Adjustable rear lower protection assembly and vehicle

Abstract

The invention discloses an adjustable rear lower protection assembly and a vehicle, and relates to the field of commercial vehicle protection.The adjustable rear lower protection assembly comprises a lifting assembly, and the lifting assembly comprises a vehicle tail connecting beam and a rear protection cross beam arranged below the vehicle tail connecting beam in parallel; a cross bridging lifting unit is arranged between the vehicle tail connecting beam and the rear protective cross beam, and a self-adaptive driving unit used for adjusting the cross angle of the cross bridging lifting unit according to the ground clearance of the rear protective cross beam is arranged on the cross bridging lifting unit; and the recycling assembly comprises two recycling rotating plates connected with the two ends of the vehicle tail connecting beam correspondingly, and the free ends of the two recycling rotating plates are rotationally connected with the vehicle frame. The terrain clearance of the rear protection cross beam and the overall longitudinal length of the lifting assembly can be flexibly adjusted, and meanwhile the lifting assembly can be selectively fixed to the vehicle tail or retracted to the vehicle bottom according to use scenes.

Description

Technical Field

[0001] The invention relates to the field of commercial vehicle protection, and in particular to an adjustable rear lower protection assembly and a vehicle. Background Art

[0002] The rear lower protection device of a vehicle has a good blocking effect when a rear-end collision occurs, preventing small cars from running into and colliding with each other, effectively protecting the rear-end collision vehicle and reducing the injuries to the people inside the rear-end collision small car, thereby increasing the survival probability of the people. Common examples include the rear lower protection device of a truck, which plays a role in buffering and absorbing energy when a small passenger car rear-ends a truck, and is an efficient and easy-to-install passive safety technology device.

[0003] However, the height of the anti-collision beam of the rear lower protection from the ground is fixed. When the vehicle goes uphill or passes through a deep pit road, the rear lower protection will produce rigid impact and collision with the ground, causing damage to the rear lower protection. At the same time, different models are equipped with different tire sizes, different rear suspension types, and inconsistent cantilever lengths of the rear protection bracket, resulting in a large number of types of rear protection assemblies with poor versatility. Furthermore, some modified vehicles have a transportation method of exchange box on the upper part, which can significantly improve vehicle utilization and avoid affecting vehicle attendance due to the loading and unloading waiting process. Therefore, when the driver is alone loading and unloading the exchange box, the rear protection at the rear of the vehicle will also hinder the loading and unloading of the exchange box. Summary of the invention

[0004] The present application provides an adjustable rear lower protection assembly and a vehicle, which can solve the technical problems existing in the prior art that the rear protection assembly has low versatility and cannot adapt to changes in tire diameter and rear suspension type in different vehicle models, resulting in too many models of rear protection assemblies, and at the same time, the traditional rear protection assembly is fixed in position and will affect other rear-end operations such as loading and unloading of the exchange box.

[0005] In a first aspect, an embodiment of the present application provides an adjustable rear lower protection assembly, comprising:

[0006] A lifting assembly, the lifting assembly comprising a rear connecting beam and a rear protection beam arranged in parallel below the rear connecting beam, a scissor support lifting unit is arranged between the rear connecting beam and the rear protection beam, and the scissor support lifting unit is provided with an adaptive driving unit for adjusting the crossing angle of the scissor support lifting unit itself according to the distance of the rear protection beam from the ground;

[0007] The recovery component comprises two recovery rotating plates respectively connected to the two ends of the rear connecting beam, and the free ends of the two recovery rotating plates are rotationally connected to the vehicle frame.

[0008] In one embodiment, a distance sensor for electrically connecting to a vehicle control system is provided at the bottom of the rear protection cross beam.

[0009] In one embodiment, a first frame connecting member is provided on a side of the rear connecting beam facing the frame.

[0010] In one embodiment, the scissors support lifting unit includes two cross rods that are cross-arranged and have overlapping center points, and a first connecting shaft is provided at the overlapping point of the center points of the two cross rods.

[0011] In one embodiment, a sliding groove is provided on the bottom surface of the rear connecting beam and the top surface of the rear protective beam, and sliding blocks located in the sliding grooves are respectively provided at both ends of the two cross rods.

[0012] In one embodiment, the rear protective cross beam is provided with limit pins located on both sides of the sliding block.

[0013] In one embodiment, the adaptive driving unit comprises a bidirectional telescopic cylinder which is longitudinally arranged and connected to the vehicle air tank, and two telescopic ends of the bidirectional telescopic cylinder are rotatably connected to the two cross rod bodies respectively.

[0014] In one embodiment, the recovery component also includes a second frame connector located at one end of the recovery rotating plate connecting frame, and the second frame connector includes a longitudinally arranged frame connecting plate and a rotating plate connecting plate horizontally arranged in the middle of the frame connecting plate.

[0015] In one embodiment, a fixing bolt penetrating the recovery rotating plate is provided on the rotating plate connecting plate, and a second connecting shaft penetrating transversely through the end of the recovery rotating plate is provided at the bottom of the frame connecting plate.

[0016] In a second aspect, an embodiment of the present application provides a vehicle, wherein the rear portion of the vehicle is provided with the above-mentioned rear lower protection assembly.

[0017] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0018] By providing a scissors-strut lifting unit between the rear connecting beam and the rear protective beam, the longitudinal length of the entire rear lower protection assembly structure can be freely adjusted according to different vehicle models. By providing an adaptive drive unit on the scissors-strut lifting unit, active adjustments can be made according to the distance of the rear protective beam from the ground during vehicle driving to prevent the rear protective beam from being too close to the ground and causing damage when the vehicle passes through a deep pit or goes uphill. At the same time, by providing a recovery rotating plate, the lifting assembly can be rotated as a whole and recovered to the bottom of the rear of the vehicle to prevent adverse effects on the rear operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of an adjustable rear lower protection assembly structure provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the structure of a scissor support lifting unit in an adjustable rear lower protection assembly provided in an embodiment of the present application;

[0022] Figure 3 A side view of a lifting component in an adjustable rear lower protection assembly provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of the structure of a second frame connection member in an adjustable rear lower protection assembly provided in an embodiment of the present application.

[0024] In the figure: 1. rear connecting beam; 101. first frame connecting part; 2. rear protective beam; 201. distance sensor; 202. sliding groove; 203. limit pin; 3. scissor support lifting unit; 301. cross rod; 302. first connecting shaft; 303. slider; 4. adaptive drive unit; 5. recovery rotating plate; 6. second frame connecting part; 601. frame connecting plate; 602. rotating plate connecting plate; 603. fixing bolt; 604. second connecting shaft. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] The embodiments of the present application provide an adjustable rear lower protection assembly and a vehicle, which can solve the problem in the prior art that the rear protection assembly has low versatility and cannot adapt to changes in tire diameter and rear suspension type in different vehicle models, resulting in too many models of rear protection assemblies. At the same time, the traditional rear protection assembly is fixed in position and will affect other rear-end operations such as loading and unloading of the exchange box.

[0027] On the first aspect, the present application provides an adjustable rear lower protection assembly, which includes a lifting component and a recovery component. The lifting component constitutes the main body of the lower protection structure, which can flexibly adjust its own longitudinal length according to different usage requirements. It can not only adapt to various types of vehicles and improve the overall versatility of the structure, but also can adaptively adjust according to the height of its bottom from the ground during vehicle driving to prevent the vehicle from passing through deep pits or uphill sections. Hard collisions or ground scratches may cause damage to the rear lower protection assembly, while the recovery component can achieve normal deployment and rapid recovery of the lifting component according to the usage scenario to avoid affecting the loading and unloading of the exchange box or other rear-end operations.

[0028] Specifically, Figure 1 A schematic diagram of an adjustable rear lower protection assembly structure provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the lifting assembly includes a rear connecting beam 1 and a rear protective beam 2 arranged parallel to and below the rear connecting beam 1, a scissors-strut lifting unit 3 is provided between the rear connecting beam 1 and the rear protective beam 2, and the scissors-strut lifting unit 3 is provided with an adaptive driving unit 4 for adjusting the crossing angle of the scissors-strut lifting unit 3 according to the distance of the rear protective beam 2 from the ground.

[0029] The rear connecting beam 1 and the rear protective beam 2 are arranged in parallel and are spaced a certain distance apart in the vehicle height direction. The top and bottom of the scissors-strut lifting unit 3 are respectively connected to the bottom surface of the rear connecting beam 1 and the top surface of the rear protective beam 2. The scissors-strut lifting unit 3 includes two crossed struts. By changing the crossing angle of the internal struts, the overall longitudinal length of the scissors-strut lifting unit 3 can be adjusted to drive the rear protective beam 2 to move toward or away from the ground, and can also adapt to the protection height requirements of different vehicle models. The adaptive drive unit 4 is arranged on the scissors-strut lifting unit 3 to serve as a power source for adaptive adjustment of the scissors-strut lifting unit 3. In one embodiment of the present application, the adaptive drive unit 4 is electrically connected to the vehicle control system. The vehicle control system obtains the real-time ground clearance of the rear protective beam 2 and sends a lifting or lowering command to the adaptive drive unit 4. The adaptive drive unit 4 adjusts the crossing angle of the scissors-strut lifting unit 3 to drive the rear protective beam 2 to rise or fall.

[0030] Furthermore, the recovery component includes two recovery rotating plates 5 respectively connected to the two ends of the rear connecting beam 1, and the free ends of the two recovery rotating plates 5 are rotatably connected to the frame. The two recovery rotating plates 5 are spaced apart in the horizontal direction, and one end of the two recovery rotating plates 5 is respectively connected to the two ends of the rear connecting beam 1, and the other ends of the two recovery rotating plates 5 are rotatably connected to the two side surfaces of the rear end of the frame to clamp the rear end of the frame. In the unfolded state, the two recovery rotating plates 5 are horizontally locked to ensure the normal protection of the lower protection assembly. When the staff is working at the rear of the vehicle, the horizontal locking state of the recovery rotating plate 5 is released, and the recovery rotating plate 5 is rotated so that the recovery rotating plate 5 takes the frame connection end as the rotation center, driving the lifting component as a whole to move toward the rear end of the frame until the lifting component as a whole is recovered to the bottom of the rear end of the vehicle.

[0031] As an optional embodiment, the connection between the recovery rotating plate 5 and the rear connecting beam 1 can be connected using bolts or other connecting parts to fix the connection angle between the two. A rotating shaft can also be set at the connection between the two so that the recovery rotating plate 5 and the lifting assembly can rotate relative to each other to adjust the storage angle of the lifting assembly after recovery. The specific connection method depends on actual needs and is not specifically limited in this application.

[0032] The rear lower protection assembly in the present application includes two modes: a protection state and a recovery state. In the protection state, the lifting component as a whole is fixed to the rear end of the vehicle via a recovery component. The vehicle controller obtains the ground clearance position of the rear protection beam 2, and controls the adaptive drive unit 4 to perform corresponding actions on the scissors support lifting unit 3 according to the obtained numerical value, thereby realizing adaptive adjustment of the rear protection beam 2. This can prevent the rear lower protection assembly from being damaged due to bouncing impact or ground scraping when the vehicle passes through a deep pit or travels on an uphill section. At the same time, based on the structural setting, the overall versatility of the rear lower protection assembly in the present application can also be improved. When the rear lower protection assembly in the present application is assembled to different vehicle models, the longitudinal length of the lifting component itself can be adjusted according to different factors such as the tire diameter, frame height, and ground clearance requirements of the vehicle model. When performing other rear end operations such as loading and unloading of the exchange box, the lifting component as a whole can be recovered to the bottom of the rear end of the vehicle via the recovery rotating plate 5 to ensure normal operation and effectively improve operation efficiency.

[0033] Further, in combination with the above description, the adaptive drive unit 4 is the key to the intelligence of the scissor support lifting unit 3. It can automatically adjust the crossing angle of the scissor support lifting unit 3 according to the real-time distance from the ground of the rear protective beam 2, thereby ensuring the stability and safety of the vehicle under different road conditions. In order to achieve this function, a distance sensor 201 for electrical connection with the vehicle control system is provided at the bottom of the rear protective beam 2. The sensing end of the distance sensor 201 faces the ground and can sense the vertical distance between the rear protective beam 2 and the ground in real time. Since the rear protective beam 2 itself has a certain length, in order to ensure the accuracy of the sensing, in one embodiment of the present application, multiple distance sensors 201 are used and are arranged equidistantly along the length direction of the rear protective beam 2.

[0034] The application of multiple distance sensors 201 not only improves the accuracy and reliability of sensing, but also can more comprehensively reflect the distance of the rear protective beam 2 from the ground at different positions. In addition, through the electrical connection between the distance sensor 201 and the vehicle control system, the distance sensor 201 can also feed back real-time data to the control system to achieve intelligent monitoring and management. Once it is detected that the distance of the rear protective beam 2 from the ground exceeds the preset range, the control system will immediately start the adaptive drive unit 4 and make necessary lifting and lowering adjustments to ensure the safety and stability of the vehicle.

[0035] In the control logic of the vehicle control system, in order to ensure the stability and safety of the vehicle under various road conditions, a minimum distance threshold between the rear protection beam 2 and the ground is preset in the vehicle control system. This threshold is determined based on multiple factors such as vehicle design requirements, driving conditions, and safety standards.

[0036] When the vehicle is traveling under different road conditions, the distance sensor 201 will sense the vertical distance between the rear protective beam 2 and the ground in real time, and send this data to the vehicle control system. The control system will then compare the received actual ground distance with the preset minimum distance threshold. If the actual ground distance is lower than the preset threshold, it means that the rear protective beam 2 is too close to the ground and may collide or scratch the ground, causing damage to the vehicle. At this time, the control system will immediately trigger the adaptive drive unit 4 to raise the rear protective beam 2 by adjusting the cross angle of the scissor support lifting unit 3 to increase the safety distance between it and the ground. On the contrary, if the actual ground distance is higher than the preset threshold, it means that the rear protective beam 2 is too high from the ground, which may affect the stability and passability of the vehicle or fail to prevent small cars from entering. In this case, the vehicle control system will also control the adaptive drive unit 4 to lower the rear protective beam 2 to ensure that the vehicle can maintain the best stability and passability under different road conditions.

[0037] Through such intelligent management and control, the vehicle control system can adjust the retracted and extended state of the scissor support lifting unit 3 in real time according to the distance from the rear protective beam 2 to the ground, thereby ensuring the safety and stability of the vehicle under various road conditions. This design not only improves the intelligence level of the vehicle, but also provides the driver with a more comfortable and safe driving experience.

[0038] Furthermore, when the lifting assembly is in the protection state, the connection with the frame mainly relies on the rear connecting beam 1 and the two recovery rotating plates 5, and the support points are mainly distributed at both ends of the rear connecting beam 1. However, the middle part of the rear connecting beam 1 is suspended in the air and may not meet the structural stability requirements. Therefore, in order to improve the connection stability between the rear lower protection assembly and the frame in this application, a first frame connector 101 is provided on the side of the rear connecting beam 1 facing the frame.

[0039] Specifically, in one embodiment of the present application, the first frame connector 101 is a horizontally arranged connecting iron plate, the two ends of the connecting iron plate are vertically folded to form a connecting surface, the two connecting surfaces are provided with connecting holes, and the rear connecting beam 1 is provided with matching holes corresponding to the connecting holes, and then one of the connecting surfaces is connected by bolts. Similarly, the other connecting surface is used to connect the frame structure, and is also connected by bolts. No more details are given here. Various external forces are dispersed and borne by the connection point between the first frame connector 101 and the frame, so as to ensure the stability and safety of the rear lower protection assembly. At the same time, the first frame connector 101 is preferably arranged at the center point of the rear connecting beam 1 to ensure that the support point is uniformly stressed. When the lifting assembly needs to be recovered to the bottom of the rear of the vehicle, the first frame connector 101 is disassembled and the horizontal locking state of the recovery rotating plate 5 is released.

[0040] Furthermore, Figure 2 A schematic diagram of the structure of a scissor support lifting unit 3 in an adjustable rear lower protection assembly provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the scissors-strut lifting unit 3 includes two cross rods 301 which are cross-arranged and have overlapping center points. A first connecting shaft 302 is provided at the overlapping center points of the two cross rods 301. The cross rods 301 are equal in length and have overlapping centers, so that the two cross rods 301 can rotate with the first connecting shaft 302 as the center, thereby realizing axial height adjustment of the scissors-strut lifting unit 3.

[0041] Since the lengths of the two cross rods 301 are exactly the same and their center points are strictly aligned, they can rotate around the first connecting shaft 302. This rotation mechanism allows the scissor brace lifting unit 3 to easily adjust its height in the axial direction. When it is necessary to raise or lower, the angle between them can be changed by driving one or two cross rods 301 to rotate around the shaft, thereby driving the longitudinal length of the entire scissor brace lifting unit 3 to change. This design not only makes the scissor brace lifting unit 3 more compact and stable in structure, but also demonstrates excellent lifting performance and flexibility in practical applications, and can provide a stable, reliable and easy-to-operate lifting solution.

[0042] Further, in combination with the above description, the lifting mechanism of the rear protective beam 2 is another important link in the scissors support lifting unit 3, which is achieved by adjusting the cross angle between the cross rods 301. When the two cross rods 301 rotate around the first connecting shaft 302, the distance between their bottom ends or top ends will change accordingly. The change in this distance directly determines the height position of the rear protective beam 2, thereby achieving the lifting effect. Therefore, in order to ensure that the cross rod 301 can maintain smooth and accurate movement during the adjustment process, the contact point between the cross rod 301 and the rear protective beam 2 and the rear connecting beam 1 is a sliding type, which means that the contact part of the cross rod 301 with the rear protective beam 2 and the rear connecting beam 1 is not fixed, but can slide within a certain range, which not only allows the cross rod 301 to maintain flexibility and accuracy during the adjustment process, but also can effectively reduce the wear and resistance caused by friction.

[0043] Specifically, Figure 3 A side view of a lifting component in an adjustable rear lower protection assembly provided in an embodiment of the present application, such as Figure 3 As shown, a sliding groove 202 is provided on the bottom surface of the rear connecting beam 1 and the top surface of the rear protective cross beam 2 , and sliding blocks 303 located in the sliding groove 202 are respectively provided at both ends of the two cross rods 301 .

[0044] The rear connecting beam 1 and the rear protective beam 2 are the key supporting structures of the scissor support lifting unit 3, and the design of the sliding grooves 202 thereon is particularly critical. Both sliding grooves 202 are arranged along the length direction of the rear connecting beam 1 and the rear protective beam 2, providing a precise track for the smooth movement of the cross bar 301. In this design, the top and bottom of the two cross bars 301 are each fixedly connected with a slider 303, and the four sliders 303 are respectively embedded in the two sliding grooves 202, ensuring the stability and accuracy of the cross bar 301 during the adjustment process.

[0045] Taking the rear connecting beam 1 as an example, when the rear protective beam 2 needs to be raised, the sliders 303 at the top of the two cross bars 301 will move away from each other along the sliding groove 202. This action causes the angle between the cross bars 301 to increase, thereby shortening the overall longitudinal length of the scissor support lifting unit 3. This change directly drives the rise of the rear protective beam 2 and achieves the desired lifting effect. On the contrary, when the rear protective beam 2 needs to be lowered, the sliders 303 at the top of the two cross bars 301 will move closer to each other along the sliding groove 202, and the angle between the cross bars 301 will decrease accordingly, and the overall longitudinal length of the scissor support lifting unit 3 will increase accordingly. This reverse movement ensures that the rear protective beam 2 can be smoothly and accurately lowered to the desired position.

[0046] It is worth noting that the bottom and top of the two cross bars 301 move synchronously during the adjustment process, which ensures the stability and consistency of the lifting process. At the same time, the sliding groove 202 on the rear protective cross beam 2 and the sliding groove 202 on the rear connecting beam 1 adopt the same design method, ensuring the coordination and reliability of the entire lifting system. This design not only simplifies the structure of the lifting mechanism, but also improves its overall performance and service life, which will not be described in detail here.

[0047] Furthermore, the rear protective beam 2 is provided with limit pins 203 located on both sides of the slider 303. In combination with the above description, the bottoms of the two cross bars 301 are located on the rear protective beam 2. Limit pins 203 are provided on both sides of each slider 303 fixedly connected to the bottom of the cross bar 301. Therefore, there are four limit pins 203 arranged along the length direction of the rear protective beam 2 on the rear protective beam 2. Each limit pin 203 penetrates the rear protective beam 2 along the thickness direction of the rear protective beam 2, forming a stable boundary frame. Such a design ensures that each slider 303 can only move within the range defined by the two relative limit pins 203. The existence of such a limit mechanism effectively prevents the over-adjustment of the scissor support lifting unit 3 during the adjustment process. When the slider 303 moves in the sliding groove 202, once the slider 303 attempts to exceed its set range of motion, the limit pin 203 will immediately prevent it from moving further, thereby ensuring the stability and safety of the lifting system.

[0048] Furthermore, the adaptive drive unit 4 includes a bidirectional telescopic cylinder longitudinally arranged and connected to the vehicle air tank, and the two telescopic ends of the bidirectional telescopic cylinder are respectively rotatably connected to the two cross rods 301. In the present application, the adaptive drive unit 4 is the power core in the scissors-strut lifting unit 3, which integrates pneumatic technology and mechanical structure to achieve efficient lifting function.

[0049] In order to further optimize the parts arrangement and improve the system efficiency, the two-way telescopic cylinder in the present application adopts an air drive mode. This means that the telescopic action of the cylinder is completely dependent on the air pressure power provided by the vehicle's air tank. Through this design, not only the structure of the system is simplified, but also the stability and reliability of the lifting process are improved. At the same time, in order to ensure that the two-way telescopic cylinder can be extended and retracted normally, the present application also sets a solenoid valve electrically connected to the vehicle control system between the air tank and the two-way telescopic cylinder. This solenoid valve is set to a long-pass state, which means that under normal circumstances, the solenoid valve always keeps the air pressure flow path between the two-way telescopic cylinder and the vehicle's air tank unobstructed. Such a design ensures that the cylinder can receive the air pressure power from the air tank at any time, thereby achieving a fast and stable telescopic action.

[0050] Furthermore, the recovery assembly also includes a second frame connecting member 6 located at one end of the recovery rotating plate 5 connected to the frame. Figure 4 A schematic diagram of the structure of a second frame connecting member 6 in an adjustable rear lower protection assembly provided in an embodiment of the present application, as shown in FIG. Figure 4 As shown, the second frame connecting member 6 includes a frame connecting plate 601 arranged longitudinally and a rotating plate connecting plate 602 arranged horizontally in the middle of the frame connecting plate 601 .

[0051] There are two second frame connecting members 6, which are respectively located at one end of the two recovery rotating plates 5 connecting the frame, and are used to realize the horizontal locking state and the rotation state of the recovery rotating plates. Specifically, the frame connecting plate 601 is longitudinally arranged and a plurality of threaded holes for connecting the rear end of the frame are opened on the frame connecting plate 601. The rotating plate connecting plate 602 is integrated with the frame connecting plate 601 and extends horizontally in the direction away from the frame. When the assembly is completed, the recovery rotating plate 5 is located at the bottom of the rotating plate connecting plate 602.

[0052] Furthermore, a fixing bolt 603 penetrating the recovery rotating plate 5 is provided on the rotating plate connecting plate 602. The fixing bolt 603 is mainly used to lock the horizontal state of the recovery rotating plate 5 in a protective state. When the lifting assembly needs to be recovered, the fixing bolt 603 can be removed.

[0053] A second connecting shaft 604 is provided at the bottom of the frame connecting plate 601 and passes horizontally through the end of the recovery rotating plate 5. The rotating plate connecting plate 602 is located in the middle of the frame connecting plate 601. The second connecting shaft 604 is provided at the bottom of the frame connecting plate 601, and the second connecting shaft 604 is in the same direction as the rotating plate connecting plate 602. When the fixing bolt 603 is removed, the recovery rotating plate 5 drives the lifting assembly to rotate around the second connecting shaft 604 until the lifting assembly is recovered to the bottom of the parking space.

[0054] The rear lower protection assembly in the present application is used as follows: in the protection state, the lifting assembly is located at the rear of the vehicle, the fixing bolts 603 in the second frame connector 6 lock the horizontal state of the recovery rotating plate 5, and the first frame connector 101 on the rear connecting beam 1 is connected and reinforced. When it is necessary to adjust the distance from the ground of the rear connecting beam 1, the adaptive drive unit 4 can be manually controlled, or the vehicle control system can control the adaptive drive unit 4 to perform corresponding actions. When working at the rear of the vehicle, the fixing bolts 603 in the second frame connector 6 and the first frame connector 101 are removed to enter the recovery state, and then the recovery rotating plate 5 is rotated until the lifting assembly moves to the bottom of the parking space.

[0055] The rear lower protection assembly in the present application can freely adjust the longitudinal length of the entire rear lower protection assembly structure according to different vehicle models by setting a scissor-strut lifting unit 3 between the rear connecting beam 1 and the rear protection beam 2. By setting an adaptive drive unit 4 on the scissor-strut lifting unit 3, the axial height of the entire rear lower protection assembly structure can be actively adjusted according to the distance of the rear protection beam 2 from the ground during vehicle driving, so as to prevent the rear protection beam 2 from being too close to the ground and causing damage when the vehicle passes through a deep pit or goes uphill. At the same time, by setting a recovery rotating plate 5, the lifting assembly can be rotated as a whole and recovered to the bottom of the rear of the vehicle, so as to prevent adverse effects on the rear operation.

[0056] Furthermore, the rear lower protection assembly in the present application can have manual trigger adjustment and automatic trigger adjustment, and the trigger mode can be switched in the operating room, that is, under automatic trigger adjustment, the distance sensor 201 participates in the adjustment work, and the normal ground clearance and the allowable variable distance range of the rear protection beam 2 are preset in the vehicle control system. When the variation range of the normal ground clearance is within the allowable variable distance range, no action is taken or adaptive fine adjustment is performed. When the variation range of the normal ground clearance exceeds the allowable variable distance range, the vehicle control system controls the adaptive drive unit 4 to perform lifting and lowering actions.

[0057] For example, assuming that the normal ground clearance is 1000 mm, the allowable variable distance interval is 200 mm, and the distance sensor 201 senses the real-time ground clearance of the rear protective beam 2, the vehicle control system determines:

[0058] When the real-time ground clearance is within 800 mm to 1200 mm, the vehicle control system may not act, or may adjust itself so that the rear protection beam 2 always maintains a normal ground clearance;

[0059] When the real-time ground clearance is greater than 1200 mm, it is judged that a deep pit is encountered, or when the real-time ground clearance is less than 800 mm, it is judged that the vehicle is going uphill. In the above two situations, rigid collision or ground scratch may occur, and the vehicle control system controls the adaptive drive unit 4 to perform corresponding lifting actions;

[0060] When loading and unloading the exchange box on the upper part, the driver can manually trigger the adjustment to raise the rear protective beam 2 and reduce the longitudinal length of the lifting component to the minimum to facilitate the recovery of the lifting component.

[0061] In a second aspect, an embodiment of the present application further provides a vehicle, the rear portion of the vehicle being provided with the above-mentioned rear lower protection assembly.

[0062] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0063] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0064] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. An adjustable rear lower protection assembly, characterized in that: include: A lifting assembly, the lifting assembly comprising a rear connecting beam (1) and a rear protective beam (2) arranged parallel to and below the rear connecting beam (1), a scissor brace lifting unit (3) being arranged between the rear connecting beam (1) and the rear protective beam (2), the scissor brace lifting unit (3) being provided with an adaptive driving unit (4) for adjusting the crossing angle of the scissor brace lifting unit (3) according to the distance of the rear protective beam (2) from the ground; A recovery component comprises two recovery rotating plates (5) respectively connected to the two ends of the vehicle rear connection beam (1), and the free ends of the two recovery rotating plates (5) are rotationally connected to the vehicle frame.

2. An adjustable rear lower protection assembly as claimed in claim 1, characterized in that: A distance sensor (201) for electrically connecting to a vehicle control system is provided at the bottom of the rear protection cross beam (2).

3. An adjustable rear lower protection assembly as claimed in claim 2, characterized in that: A first frame connecting member (101) is provided on a side of the rear connecting beam (1) facing the frame.

4. The adjustable rear lower protection assembly according to claim 1, characterized in that: The scissor support lifting unit (3) comprises two cross rods (301) which are arranged crosswise and whose center points coincide with each other. A first connecting shaft (302) is provided at the point where the center points of the two cross rods (301) coincide with each other.

5. An adjustable rear lower protection assembly as claimed in claim 4, characterized in that: The bottom surface of the rear connecting beam (1) and the top surface of the rear protective beam (2) are both provided with a sliding groove (202), and the two ends of the two cross rods (301) are respectively provided with a sliding block (303) located in the sliding groove (202).

6. An adjustable rear lower protection assembly as claimed in claim 5, characterized in that: The rear protective cross beam (2) is provided with limit pins (203) located on both sides of the sliding block (303).

7. An adjustable rear lower protection assembly as claimed in claim 4, characterized in that: The adaptive drive unit (4) comprises a bidirectional telescopic cylinder which is longitudinally arranged and connected to the vehicle air storage cylinder, and the two telescopic ends of the bidirectional telescopic cylinder are respectively rotatably connected to the rod bodies of the two cross rods (301).

8. The adjustable rear lower protection assembly according to claim 1, characterized in that: The recovery component also includes a second frame connecting member (6) located at one end of the recovery rotating plate (5) connected to the frame, and the second frame connecting member (6) includes a longitudinally arranged frame connecting plate (601) and a rotating plate connecting plate (602) horizontally arranged in the middle of the frame connecting plate (601).

9. An adjustable rear lower protection assembly as claimed in claim 8, characterized in that: The rotating plate connecting plate (602) is provided with a fixing bolt (603) penetrating the recovery rotating plate (5), and the bottom of the frame connecting plate (601) is provided with a second connecting shaft (604) penetrating laterally through the end of the recovery rotating plate (5).

10. A vehicle, characterized in that: The rear part of the vehicle is provided with a rear lower protection assembly as described in any one of claims 1 to 9.

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