Vehicle rear suspension method with integrated functions

Abstract

The invention provides a vehicle rear suspension method with integrated functions, which relates to the technical field of new energy trucks, and comprises the following steps: when a connecting buckle unlocking signal is received, judging whether the difference value of the buffer distance of two buffer rods is not greater than a first preset threshold value or not, and if so, working a height valve; otherwise, the operation is not executed; the height valve obtains the suspension distance between the upper beam and the lower beam in real time; when the suspension distance is larger than a second preset threshold value, the functional air bag is deflated; when the suspension distance is smaller than a second preset threshold value, the functional air bag is inflated until the distance between the upper beam and the lower beam is stable; whether the difference value of the two height valves is not larger than a third preset threshold value or not is judged, and if yes, the connecting buckle is unlocked; otherwise, the operation is not executed. Through the functional air bag and the buffer rod in the rear suspension structure, safety adjustment is effectively carried out before the carriage is lifted, the carriage safety is further guaranteed when the carriage is lifted, the cab carriage is effectively prevented from overturning, and the safety is high.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy trucks, and in particular to a vehicle rear suspension method with integrated functions. Background Art

[0002] Freight trucks are generally called trucks, also known as trucks. They are mainly used to transport goods. Sometimes they also refer to cars that can tow other vehicles. They belong to the category of commercial vehicles. Generally, they can be divided into heavy and light types according to the weight of the vehicle. Most trucks use diesel engines as their power source, but some light trucks use gasoline, LPG or natural gas. With the large-scale development of new energy technology in the country, some trucks are also driven by new energy such as electricity.

[0003] As new energy trucks have better acceleration and deceleration performance, the shock and collision resistance requirements of new energy trucks are higher. The driving cabin of new energy trucks generally adopts the structure of the suspension system for shock and collision resistance; the driving cabin suspension system includes a front suspension assembly arranged between the front lower part of the driving cabin and the frame and a rear suspension assembly arranged between the rear lower part of the driving cabin and the frame; it mainly supports, flips and resists rollover of the driving cabin, and at the same time attenuates the vibration and impact transmitted to the driving cabin by the uneven road surface during vehicle driving, guides the vertical movement of the driving cabin relative to the ground, limits the roll and deflection movement of the driving cabin, and improves ride comfort.

[0004] Current rear suspension assemblies are equipped with multiple buffer parts on the suspension assembly, which can only maintain the balance and buffer of the cab compartment after the cab compartment is lowered. However, during the process of tilting and lowering the cab compartment, the rear suspension assembly hardly plays a role. There are at least two load-bearing points on the rear suspension and are distributed on the left and right sides of the rear suspension assembly, but the lifting and lowering cylinder when the cab compartment is raised has only one supporting point. Therefore, when the cab compartment needs to be lifted for maintenance and inspection, if the center of gravity of the cab compartment deviates, once the lifting and lowering cylinder pushes the compartment to rise, after the compartment leaves the rear suspension assembly, it may cause the compartment to overturn or the lifting and lowering cylinder to be damaged, causing personal safety hazards and property losses.

[0005] Therefore, in order to solve the above problems, it is necessary for us to design a reasonable vehicle rear suspension method with integrated functions. Summary of the invention

[0006] The purpose of the present invention is to provide a vehicle rear suspension method with integrated functions. Through the functional airbag and buffer rod in the rear suspension structure, safety adjustments can be effectively made before the car body is raised, further ensuring the safety of the car body when it is raised, and effectively preventing the cab from overturning, with high safety.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A vehicle rear suspension method with integrated functions is applicable to a vehicle rear suspension structure with integrated functions, comprising an upper beam and a lower beam, wherein the upper beam and the lower beam are connected by two left-right symmetrical buffer units, wherein the buffer units comprise a functional airbag and a buffer rod; a height valve is arranged at the functional airbag, a connecting buckle for connecting with a bottom beam of a driving compartment is arranged on the upper beam, and a locking valve is arranged in the connecting buckle;

[0009] The method comprises the following steps:

[0010] S1: Determine whether a connection buckle unlocking signal is received, if yes, execute step S2; otherwise, do not execute the operation;

[0011] S2: Determine whether the difference between the buffer distances of the two buffer rods is not greater than a first predetermined threshold value, if so, execute step S3; otherwise, do not execute the operation;

[0012] S3: the height valve acquires the suspension distance between the upper beam and the lower beam in real time; when the suspension distance is greater than a second predetermined threshold, the functional airbag is deflated; and when the suspension distance is less than the second predetermined threshold, the functional airbag is inflated until the distance between the upper beam and the lower beam is stable;

[0013] S4: Determine whether the difference between the two height valves is not greater than a third predetermined threshold value, if so, the connecting buckle is unlocked; otherwise, no operation is performed.

[0014] As a preferred embodiment of the present invention, a controller is further provided between the upper beam and the lower beam, and the functional airbag, the buffer rod, the height valve and the connecting buckle are all electrically connected to the controller;

[0015] When executing step S1, a connection buckle unlocking signal is received and the controller wakes up;

[0016] When executing step S2, the controller obtains the buffer distance of the two buffer rods;

[0017] When executing step S3, the height valve obtains the suspension distance between the upper beam and the lower beam in real time, and the controller controls the functional airbag to inflate and deflate after reading the height valve data;

[0018] When executing step S4, when the controller obtains that the difference between the two height valves is not greater than the third predetermined threshold, the controller controls the connecting buckle to unlock.

[0019] As a preferred embodiment of the present invention, the functional airbag is arranged between the end of the upper beam and the end of the lower beam; the number of the height valves is also two, and the height valve includes a height rod arranged at the connection between the upper beam and the functional airbag and extending toward the lower beam, and an induction valve arranged on the lower beam for obtaining the height of the height rod.

[0020] As a preferred embodiment of the present invention, before executing step S3, a distance L between the center point of the upper beam and the functional airbag is obtained;

[0021] So that when executing step S3,

[0022] The inflation and deflation volume P of the functional airbag is ΔH*L / a;

[0023] Wherein: ΔH is the difference between the suspension distance and the first predetermined threshold; a is the cargo load coefficient value of the truck.

[0024] As a preferred embodiment of the present invention, when step S3 is performed, specifically:

[0025] S31: The height valve obtains the suspension distance between the upper beam end and the lower beam end;

[0026] S32: The functional airbag calculates the inflation and deflation amount according to the suspension spacing;

[0027] S33: Determine whether the change value of the height valve measurement reading is greater than a fourth predetermined threshold value, if so, return to step S31; otherwise, the functional airbag is adjusted and step S34 is executed;

[0028] S34: After the two functional airbags are adjusted, the distance between the ends of the upper beam and the lower beam is stable.

[0029] As a preferred embodiment of the present invention, when executing steps S31 to S33, the two functional airbags are controlled and adjusted separately.

[0030] As a preferred embodiment of the present invention, the distance between the middle part of the lower beam and the upper beam is smaller than the distance between the end part of the lower beam and the upper beam, so that the left and right inclined beams of the lower beam form an inverted V-shaped member; the buffer rod is obliquely arranged between the inclined beam and the upper beam.

[0031] As a preferred embodiment of the present invention, before executing step S2, a first predetermined threshold is generated according to the model of the new energy truck.

[0032] As a preferred embodiment of the present invention, when executing step S2, when the difference between the buffer distances of the two buffer rods is greater than a first predetermined threshold, the controller issues a first-level alarm.

[0033] As a preferred embodiment of the present invention, when executing step S4, when the difference between the two height valves is greater than a third predetermined threshold, the controller issues a second-level alarm.

[0034] The vehicle rear suspension method with integrated functions of the present invention has the following beneficial effects:

[0035] Through the functional airbags and buffer rods in the rear suspension structure, safety adjustments can be effectively made before the car body is raised, further ensuring the safety of the car body when it is raised, and effectively preventing the cab from tipping over, with high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic flow chart of a vehicle rear suspension method with integrated functions according to the present invention;

[0037] Figure 2 The present invention is a schematic structural diagram of a vehicle rear suspension structure with integrated functions. DETAILED DESCRIPTION

[0038] The following are specific embodiments of the present invention, which further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0039] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of modules and structures set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0040] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0041] Technologies, methods, and systems known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and systems should be considered part of the authorization specification.

[0042] Embodiment 1: Figure 1 , 2 The figure is only one of the embodiments of the present invention, a vehicle rear suspension method with integrated functions, applicable to a vehicle rear suspension structure with integrated functions, including an upper beam 1 and a lower beam 2, wherein the upper beam and the lower beam are connected by two buffer units that are symmetrical on both sides, and the buffer unit includes a functional airbag 3 and a buffer rod 4; a height valve 5 is arranged at the functional airbag 3, and a connecting buckle 6 for connecting with the bottom beam of the driving compartment is arranged on the upper beam 1, and a locking valve is arranged in the connecting buckle;

[0043] The method comprises the following steps:

[0044] S1: Determine whether a connection buckle unlocking signal is received, if yes, execute step S2; otherwise, do not execute the operation;

[0045] S2: Determine whether the difference between the buffer distances of the two buffer rods is not greater than a first predetermined threshold value, if so, execute step S3; otherwise, do not execute the operation;

[0046] S3: the height valve acquires the suspension distance between the upper beam and the lower beam in real time; when the suspension distance is greater than a second predetermined threshold, the functional airbag is deflated; and when the suspension distance is less than the second predetermined threshold, the functional airbag is inflated until the distance between the upper beam and the lower beam is stable;

[0047] S4: Determine whether the difference between the two height valves is not greater than a third predetermined threshold value, if so, the connecting buckle is unlocked; otherwise, no operation is performed.

[0048] In the present invention, when the new energy truck is started, that is, when the new energy truck needs to be used, if the driving compartment needs to be raised for maintenance and inspection, a driving compartment raising signal needs to be sent first.

[0049] Moreover, when the car body is not raised, the bottom beam of the cab is stuck in the connecting buckle and locked by the locking valve in the connecting buckle. The locking valve is a hydraulic valve, which ensures the stable connection between the bottom beam of the cab and the rear suspension assembly. The signal for raising the cab body is also a signal for unlocking the hydraulic valve in the connecting buckle. Then, when executing step S1, it can be understood that receiving the unlocking signal of the connecting buckle is a signal that the car body needs to be raised.

[0050] Then comes step S2: if the difference in the buffer distances of the two buffer bars is not greater than the second predetermined threshold value, the center of gravity offset distance of the bottom beam of the cab of the new energy truck is small, the center of gravity offset is controllable, the cab compartment is raised, and the compartment will not overturn, and the next step of safety assessment can be carried out at this time; on the contrary, if the difference in the buffer distances of the two buffer bars is greater than the second predetermined threshold value, the center of gravity offset distance of the bottom beam of the cab of the new energy truck is large, the center of gravity offset is uncontrollable, and if the lifting cylinder is started, there is a risk of overturning of the compartment, and the connecting buckle unlocking task is directly terminated at this time, and an alarm is issued at this time to notify the safety staff to confirm the safety of the compartment.

[0051] Then comes step S3: when the center of gravity offset distance of the bottom beam of the driving compartment of the new energy truck is small and the center of gravity offset is controllable, the suspension heights on both sides of the car body mounted on the rear suspension assembly are obtained to determine whether the weight on both sides of the car body is controllable.

[0052] The second predetermined threshold refers to: when the new energy truck is stationary on horizontal ground and the car body is in the lowered state, the distance between the upper beam and the lower beam. At this time, the gravity on the upper beam can also be considered to be the standard gravity value.

[0053] Once the height valve obtains the suspension distance between the upper beam and the lower beam to be less than the second predetermined threshold value, it means that the gravity on the upper beam here is greater than the standard gravity value, and the functional airbag needs to be inflated to push the upper beam up; conversely, if the height valve obtains the suspension distance between the upper beam and the lower beam to be greater than the second predetermined threshold value, it means that the gravity on the upper beam here is less than the standard gravity value, and the functional airbag needs to be deflated and the upper beam naturally drops.

[0054] Of course, if the height valve obtains that the suspension distance between the upper beam and the lower beam is equal to the second predetermined threshold, it means that the gravity on the upper beam here is the standard gravity value, and the functional airbag does not need to be inflated or deflated.

[0055] In addition, the inflation and deflation of the functional airbag is not intended to completely make the suspension distance between the upper beam and the lower beam equal to the second predetermined threshold, but only to make the suspension distance close to the second predetermined threshold to ensure that the upper beam and the lower beam maintain balance.

[0056] It can be understood that step S3 is to perform buffering and leveling before the carriage is raised.

[0057] Finally, step S4: after the functional airbag has cushioned and leveled the car body, if the difference between the two height valves is not greater than the third predetermined threshold value, the center of gravity offset distance of the bottom beam of the cab of the new energy truck is small, the center of gravity offset is controllable, the lifting cylinder is opened, and the car body will not overturn. At this time, the connecting buckle is unlocked by the hydraulic valve, and the cab lifting cylinder is opened; on the contrary, if the difference between the two height valves is greater than the third predetermined threshold value, the weight on both sides of the cab of the new energy truck is unbalanced, and the center of gravity offset is uncontrollable. If the lifting cylinder is opened, there is a risk of overturning of the car body. At this time, the hydraulic valve is not unlocked, the lifting cylinder is not opened, and the car body still needs the support of the rear suspension assembly, and an alarm is sounded at this time to notify the safety staff to confirm the safety of the car body.

[0058] In the present invention, a controller is further provided between the upper beam and the lower beam, and the functional airbag, the buffer rod, the height valve and the connecting buckle are all electrically connected to the controller;

[0059] When executing step S1, a connection buckle unlocking signal is received and the controller wakes up;

[0060] When executing step S2, the controller obtains the buffer distance of the two buffer rods;

[0061] When executing step S3, the height valve obtains the suspension distance between the upper beam and the lower beam in real time, and the controller controls the functional airbag to inflate and deflate after reading the height valve data;

[0062] When executing step S4, when the controller obtains that the difference between the two height valves is not greater than the third predetermined threshold, the controller controls the connecting buckle to unlock.

[0063] The integrated function vehicle rear suspension method of the present invention uses the functional airbag and buffer rod in the rear suspension structure to effectively make safety adjustments before the car body is raised, further ensure the safety of the car body when it is raised, effectively prevent the driver's cabin from overturning, and has high safety.

[0064] Embodiment 2: Still as Figure 1 , 2 The figure shown is only one of the embodiments of the present invention. On the basis of the first embodiment, in a vehicle rear suspension method with integrated functions of the present invention, the functional airbag 3 is arranged between the end of the upper beam 1 and the end of the lower beam 2; the number of the height valves 5 is also two, and the height valve 5 includes a height rod arranged at the connection between the upper beam 1 and the functional airbag 3 and extending toward the lower beam 2, and a sensing valve arranged on the lower beam 2 for obtaining the height of the height rod.

[0065] Furthermore, before executing step S3, a distance L between the center point of the upper beam and the functional airbag is obtained;

[0066] So that when executing step S3,

[0067] The inflation and deflation volume P of the functional airbag is ΔH*L / a;

[0068] Wherein: ΔH is the difference between the suspension distance and the first predetermined threshold; a is the cargo load coefficient value of the truck.

[0069] In the present invention, when executing step S3, specifically:

[0070] S31: The height valve obtains the suspension distance between the upper beam end and the lower beam end;

[0071] S32: The functional airbag calculates the inflation and deflation amount according to the suspension spacing;

[0072] S33: Determine whether the change value of the height valve measurement reading is greater than a fourth predetermined threshold value, if so, return to step S31; otherwise, the functional airbag is adjusted and step S34 is executed;

[0073] S34: After the two functional airbags are adjusted, the distance between the ends of the upper beam and the lower beam is stable.

[0074] Of course, when executing steps S31 to S33, the two functional airbags are controlled and adjusted separately.

[0075] Embodiment 3: Still as Figure 1 , 2The figure shown is only one of the embodiments of the present invention. Based on any of the above embodiments, in an integrated function vehicle rear suspension method of the present invention, the distance between the middle part of the lower beam 2 and the upper beam 1 is smaller than the distance between the end part of the lower beam 2 and the upper beam 1, so that the left and right inclined beams of the lower beam 2 form an inverted V-shaped member; the buffer rod 4 is obliquely arranged between the inclined beam and the upper beam 1.

[0076] Furthermore, before executing step S3, a first predetermined threshold is generated according to the model of the new energy truck.

[0077] Finally, when executing step S2, when the difference between the buffer distances of the two buffer rods is greater than a first predetermined threshold, the controller issues a first-level alarm;

[0078] When executing step S4, when the difference between the two height valves is greater than the third predetermined threshold, the controller issues a second-level alarm.

[0079] The integrated function vehicle rear suspension method of the present invention uses the functional airbag and buffer rod in the rear suspension structure to effectively make safety adjustments before the car body is raised, further ensure the safety of the car body when it is raised, effectively prevent the driver's cabin from overturning, and has high safety.

[0080] The present invention is not limited to the above specific implementations, and the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made to the above implementations based on the technical essence of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vehicle rear suspension method with integrated functions, characterized in that: A vehicle rear suspension structure with integrated functions, comprising an upper beam (1) connected to a bottom beam of a driving compartment and a lower beam (2) connected to the upper beam (1), wherein the upper beam (1) is connected to the bottom beam of the driving compartment via a connecting buckle (6), and the lower beam is connected to the upper beam (1) via two buffer units, wherein the two buffer units are symmetrically arranged at two ends of the lower beam (2), and the buffer units comprise a functional airbag (3) and a buffer rod (4); a height valve (5) is arranged on the functional airbag (3), and a locking valve is arranged in the connecting buckle; The method comprises the following steps: S1: Determine whether a connection buckle unlocking signal is received, if yes, execute step S2; otherwise, do not execute the operation; S2: Determine whether the difference between the buffer distances of the two buffer rods is not greater than a first predetermined threshold value, if so, execute step S3; otherwise, do not execute the operation; S3: the height valve acquires the suspension distance between the upper beam and the lower beam in real time; when the suspension distance is greater than a second predetermined threshold, the functional airbag is deflated; and when the suspension distance is less than the second predetermined threshold, the functional airbag is inflated until the distance between the upper beam and the lower beam is stable; S4: Determine whether the difference between the two height valves is not greater than a third predetermined threshold value, if so, the connecting buckle is unlocked; otherwise, no operation is performed.

2. The method for rear suspension of a vehicle with integrated functions according to claim 1, characterized in that: A controller is also provided between the upper beam and the lower beam, and the functional airbag (3), the buffer rod (4), the height valve (5) and the connecting buckle (6) are all electrically connected to the controller; When executing step S1, a connection buckle unlocking signal is received and the controller wakes up; When executing step S2, the controller obtains the buffer distance of the two buffer rods; When executing step S3, the height valve obtains the suspension distance between the upper beam and the lower beam in real time, and the controller controls the functional airbag to inflate and deflate after reading the height valve data; When executing step S4, when the controller obtains that the difference between the two height valves is not greater than the third predetermined threshold, the controller controls the connecting buckle to unlock.

3. The method for integrated vehicle rear suspension according to claim 1, characterized in that: The functional airbag (3) is arranged between the end of the upper beam (1) and the end of the lower beam (2); the number of the height valves (5) is also two, and the height valve (5) comprises a height rod arranged at the connection between the upper beam (1) and the functional airbag (3) and extending toward the lower beam (2), and a sensing valve arranged on the lower beam (2) for obtaining the height of the height rod.

4. The method for rear suspension of a vehicle with integrated functions according to claim 3, characterized in that: Before executing step S3, obtaining a distance L between the center point of the upper beam and the functional airbag; So that when executing step S3, The inflation and deflation volume P of the functional airbag is ΔH*L / a; Wherein: ΔH is the difference between the suspension distance and the first predetermined threshold; a is the cargo load coefficient value of the truck.

5. The method for integrated vehicle rear suspension according to claim 4, characterized in that: When executing step S3, specifically: S31: The height valve obtains the suspension distance between the upper beam end and the lower beam end; S32: The functional airbag calculates the inflation and deflation amount according to the suspension spacing; S33: Determine whether the change value of the height valve measurement reading is greater than a fourth predetermined threshold value, if so, return to step S31; otherwise, the functional airbag is adjusted and step S34 is executed; S34: After the two functional airbags are adjusted, the distance between the ends of the upper beam and the lower beam is stable.

6. The method for integrated vehicle rear suspension according to claim 5, characterized in that: When executing steps S31 to S33, the two functional airbags are controlled and adjusted separately.

7. The method for integrated vehicle rear suspension according to claim 3, characterized in that: The distance between the middle of the lower beam (2) and the upper beam (1) is smaller than the distance between the end of the lower beam (2) and the upper beam (1), so that the left and right inclined beams of the lower beam (2) form an inverted V-shaped member; the buffer rod (4) is obliquely arranged between the inclined beam and the upper beam (1).

8. The method for integrated vehicle rear suspension according to claim 7, characterized in that: Before executing step S2, a first predetermined threshold is generated according to the model of the new energy truck.

9. The method for integrated vehicle rear suspension according to claim 2, characterized in that: When executing step S2, when the difference between the buffer distances of the two buffer rods is greater than a first predetermined threshold, the controller issues a first-level alarm.

10. The method for integrated vehicle rear suspension according to claim 2, characterized in that: When executing step S4, when the difference between the two height valves is greater than the third predetermined threshold, the controller issues a second-level alarm.

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