Chassis system and vehicle

Abstract

The utility model discloses a chassis system and a vehicle. The chassis system comprises an axle. The axle extends in the width direction of the vehicle, the two ends of the axle are suitable for installing wheel structures, at least part of the axle protrudes out of one side in the length direction of the vehicle to form an avoiding space, and the avoiding space is suitable for avoiding a power structure. One side, in the second direction, of the axle protrudes or sinks to form the avoiding space, the arrangement space needed by the power structure can be effectively avoided, sufficient space is provided for arrangement of other parts in a chassis system, the space utilization rate of the chassis system and a vehicle is effectively increased, meanwhile, collision between the axle and the power structure is avoided, and the service life of the vehicle is prolonged. The jumping space of the power structure in the third direction is increased, the service life of the axle and the power structure is prolonged, and the safety and reliability of a chassis system are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle suspension technical field especially is a chassis system and vehicle. BACKGROUND

[0002] In prior art, the structure and arrangement mode of axle and the like occupy a large space of chassis system, affect the layout of other systems of vehicle, and make the space utilization rate of vehicle body chassis system lower. SUMMARY

[0003] The utility model discloses at least solve one of the prior art technical problems. Therefore, one purpose of the utility model is to propose a chassis system, which can improve the space utilization rate of vehicle.

[0004] A second purpose of the utility model is to propose a vehicle comprising the chassis system of any one of the first aspect embodiments.

[0005] According to the chassis system of the first aspect embodiment of the utility model, the axle extends along the width direction of the vehicle, and the two ends of the axle are adapted to install the wheel structure. At least part of the axle protrudes along one side of the length direction of the vehicle to form an avoiding space, and the avoiding space is adapted to avoid the power structure.

[0006] According to the chassis system of the utility model embodiment, the axle is protruded or recessed along one side of the second direction to form an avoiding space, which can effectively avoid the arrangement space required by the power structure, provide sufficient space for the arrangement of other components in the chassis system, effectively improve the space utilization rate of the chassis system and the vehicle, avoid the collision between the axle and the power structure, increase the space for the power structure to jump in the third direction, prolong the service life of the axle and the power structure, and improve the safety and reliability of the chassis system.

[0007] In some embodiments, the axle comprises: a first axle section and two second axle sections, one end of the two second axle sections is adapted to be connected with the wheel structure, the other end of the two second axle sections is connected with the first axle section, the two second axle sections are inclinedly arranged, the two second axle sections are arranged at the two ends of the first axle section along the width direction of the vehicle, and the first axle section and the second axle section define the avoiding space.

[0008] In some embodiments, in the length direction of the vehicle, the two second axle sections are located on the same side of the first axle section connection.

[0009] In some embodiments, the chassis system further comprises: a brake assembly arranged at both ends of the axle, and a center of mounting points of the axle and brake assembly is below a central axis of the brake assembly, or

[0010] A center of mounting points of the axle and brake assembly is below a central axis of the brake assembly.

[0011] In some embodiments, the chassis system further comprises: a leaf spring assembly arranged at both ends of the axle, the leaf spring assembly being arranged on the axle and adapted to be connected with a frame.

[0012] In some embodiments, the leaf spring assembly comprises: a leaf spring arranged on the axle; and a mounting bracket arranged at an end of the leaf spring in a length direction of the vehicle, one end of the mounting bracket being connected with the leaf spring, and the other end of the mounting bracket being adapted to be connected with the frame.

[0013] In some embodiments, the leaf spring assembly further comprises: a bushing arranged between the leaf spring and the mounting bracket, the leaf spring and the mounting bracket being rotatably connected through the bushing.

[0014] In some embodiments, the bushing is a metal-rubber composite bushing.

[0015] In some embodiments, the leaf spring comprises a first leaf spring section, a second leaf spring section and a third leaf spring section connected in sequence, the first leaf spring section and the third leaf spring section are both inclined and curved to extend upwards relative to the second leaf spring section.

[0016] In some embodiments, a highest point of the first leaf spring section is lower than a highest point of the third leaf spring section.

[0017] In some embodiments, a thickness of the first leaf spring section is smaller than a thickness of the second leaf spring section, a thickness of the third leaf spring section is smaller than the thickness of the second leaf spring section; and / or a width of the first leaf spring section is greater than a width of the second leaf spring section, a width of the third leaf spring section is greater than the width of the second leaf spring section.

[0018] In some embodiments, the leaf spring is a leaf spring with gradually changing stiffness.

[0019] In some embodiments, the axle further comprises: a support arranged at an end of the axle, the support extending in a length direction of the vehicle.

[0020] In some embodiments, the leaf spring assembly is connected with the support.

[0021] In some embodiments, the chassis system further comprises a pressing plate and a fastener, the pressing plate is arranged on the side of the leaf spring assembly away from the support in the height direction of the vehicle, and the fastener is arranged through the pressing plate, the leaf spring assembly and the support to fix the leaf spring between the pressing plate and the axle.

[0022] In some embodiments, the chassis system further comprises a power structure, at least part of the power structure is located in the avoiding space.

[0023] In some embodiments, the power structure comprises a driving motor and a transmission shaft, the driving motor is adapted to be connected with the frame, one end of the transmission shaft is connected with the driving motor, and the other end of the transmission shaft is connected with the wheel structure.

[0024] In some embodiments, the chassis system further comprises a power structure, in the height direction of the vehicle, the transmission shaft of the power structure is arranged above the leaf spring assembly adjacent to the end of the wheel structure; and / or,

[0025] The axle is arranged below the leaf spring assembly.

[0026] In some embodiments, the axle further comprises a connecting plate arranged on the side of the support away from the axle, and the chassis system further comprises a brake assembly connected with the connecting plate.

[0027] In some embodiments, the connecting plate and the axle are integrally formed.

[0028] According to the second aspect of the utility model embodiments, the vehicle comprises the chassis system of any one of the first aspect of the utility model embodiments.

[0029] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0030] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0031] Figure 1 is a schematic view according to one perspective of the first aspect of the utility model embodiments;

[0032] Figure 2 is a schematic view of a leaf spring according to the first aspect of the utility model embodiments;

[0033] Figure 3 is a partial cross-sectional schematic view of the chassis system according to the first aspect of the utility model embodiments;

[0034] Figure 4 yes Figure 3 Enlarged schematic diagram of region P in the middle;

[0035] Figure 5 yes Figure 3 Enlarged schematic diagram of the mid-Q region;

[0036] Figure 6 This is a schematic diagram from another perspective according to the first aspect of the present invention;

[0037] Figure 7 This is a schematic diagram of the load-displacement characteristic curve of the leaf spring according to the first aspect embodiment of the present invention.

[0038] Figure label:

[0039] 100. Chassis system;

[0040] 10. Leaf spring assembly; 11. Leaf spring; 111. First leaf spring segment; 112. Second leaf spring segment; 113. Third leaf spring segment; 12. Mounting bracket; 121. Front mounting bracket; 122. Rear mounting bracket; 13. Bushing; 131. Inner shell; 132. Outer shell; 133. Flexible component;

[0041] 20. Power structure; 21. Drive shaft; 22. Drive motor;

[0042] 30. Axle; 31. First axle section; 32. Second axle section;

[0043] 40. Pressure plate; 41. Brake assembly; 42. Connecting plate; 43. Limiting block; 44. Shock absorber; 45. Fastener; 46. Support component;

[0044] A. First direction; B. Second direction; C. Third direction. Detailed Implementation

[0045] The embodiments of this utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-7 The chassis system 100 according to an embodiment of the present utility model is described. The chassis system 100 includes: an axle 30.

[0046] Specifically, such as Figure 1 and Figure 6 As shown, the axle 30 extends along the width direction of the vehicle, and both ends of the axle 30 are adapted to mount wheel structures. At least a portion of the axle 30 protrudes along one side of the length direction of the vehicle to form a clearance space, which is adapted to avoid the power structure 20. In this application, the first direction A is the width direction of the vehicle, the second direction B is the length direction of the vehicle, and the third direction C is the height direction of the vehicle.

[0047] Optionally, the axle 30 extends along a first direction A of the vehicle, the axle 30 is adapted to bear the load of the vehicle and maintain the normal driving of the vehicle on the road; at least part of the axle 30 is protruded or recessed towards one side of the second direction B of the vehicle and forms an avoiding space, the size of the avoiding space is matched with the size of the power structure 20 in the vehicle, and the first direction A and the second direction B are perpendicular. In this embodiment, the part of the axle 30 adjacent to the middle region is recessed along the second direction B towards the rear of the vehicle to form an avoiding space for avoiding the power structure 20 such as the driving motor 22. The axle 30 can be a stamping welded structure or a cast structure or a forged structure.

[0048] According to the chassis system 100 of the embodiment of the utility model, by making the axle 30 protruded or recessed towards one side of the second direction B to form an avoiding space, the arrangement space required by the power structure 20 can be effectively avoided, sufficient space is provided for the arrangement of other parts in the chassis system 100, the space utilization rate of the chassis system 100 and the vehicle is effectively improved, at the same time, the collision between the axle 30 and the power structure 20 is avoided, the space of the power structure 20 jumping in the third direction C is increased, the service life of the axle 30 and the power structure 20 is prolonged, and the safety and reliability of the chassis system 100 are improved.

[0049] According to some embodiments of the utility model, as shown in Figure 6 The axle 30 comprises: a first axle section 31 and two second axle sections 32, one end of the two second axle sections 32 is adapted to be connected with the wheel structure, the other end of the two second axle sections 32 is connected with the first axle section 31, the two second axle sections 32 are obliquely arranged, the two second axle sections 32 are arranged at both ends of the first axle section 31 along the width direction of the vehicle, and the first axle section 31 and the second axle section 32 define the avoiding space.

[0050] For example, the first axle section 31 extends along the first direction A of the vehicle, one end of the two second axle sections 32 adjacent to each other is connected with both ends of the first axle section 31 along the first direction A respectively, the other end of the two second axle sections 32 far away from each other is connected with the wheel structure respectively, the two second axle sections 32 are obliquely arranged at both ends of the first axle section 31 along the first direction A of the vehicle respectively, and the first axle section 31 and the two second axle sections 32 jointly define the avoiding space. Wherein, the oblique arrangement of the second axle section 32 refers to that one end of the second axle section 32 adjacent to the first axle section 31 extends obliquely along the first direction A of the axle 30 towards one side of the second direction B of the axle 30, and the first axle section 31 and the second axle section 32 are arranged in a staggered manner along the first direction A.

[0051] Therefore, the axle 30 comprises the first axle section 31 and two second axle sections 32, the two second axle sections 32 are respectively connected to two ends of the first axle section 31 in an inclined manner, and the first axle section 31 and the two second axle sections 32 jointly define the avoiding space, effectively improving the space utilization of the chassis system 100, and the bent axle 30 has high torsional stiffness, improving the reliability of the axle 30.

[0052] Optionally, the axle 30 can adopt a segmented design, effectively improving the torsional performance of the axle 30 and improving the overall structural strength of the axle 30.

[0053] According to some embodiments of the present application, as shown in Figure 1 In the length direction of the vehicle, the two second axle sections 32 are located on the same side of the first axle section 31.

[0054] In the embodiment, the two second axle sections 32 are arranged on the same side of the first axle section 31 along the second direction B of the vehicle, and the first axle section 31 and the two second axle sections 32 are aligned along the third direction C, so that the first axle section 31 and the two second axle sections 32 are located on the same horizontal plane, avoiding the bending or breaking of the axle 30 during the driving of the vehicle, improving the safety and reliability of the axle 30, reducing the maintenance cost of the axle 30, improving the carrying capacity of the vehicle, and ensuring the normal driving of the vehicle. At the same time, it is convenient to form the avoiding space.

[0055] According to some embodiments of the present application, as shown in Figure 1 The chassis system 100 further comprises a brake assembly 41, the brake assembly 41 is arranged at two ends of the axle 30, and the center of the mounting point of the axle 30 and the brake assembly 41 is located below the central axis of the brake assembly 41.

[0056] Optionally, the brake assembly 41 is arranged at two ends of the axle 30 along the first direction A of the vehicle, and the height of the center of the mounting point of the axle 30 and the brake assembly 41 along the third direction C of the vehicle is lower than the height of the central axis of the brake assembly 41 along the third direction C of the vehicle. For example, during the installation of the wheel structure, the brake assembly 41 and the axle 30, the brake assembly 41 is connected with the axle 30, the power structure 20 is adapted to be connected with the wheel structure to drive the movement of the wheel, and the brake assembly 41 is used to control the movement state of the wheel structure, such as the brake assembly 41 is adapted to control the wheel structure to make the vehicle decelerate or stop moving, etc.

[0057] Therefore, the brake assembly 41 is arranged at two ends of the axle 30, and the mounting points of the axle 30 and the brake assembly 41 are below the central axis of the brake assembly 41, so that the gravity center of the chassis system 100 can be lowered, the overall height of the vehicle can be lowered, and the stability of the vehicle during movement can be improved. At the same time, the mounting structure of the brake assembly 41 can be simplified to facilitate the mounting of the brake assembly 41 on the axle 30, increase the support of the brake assembly 41, and improve the reliability of the mounting.

[0058] In another optional embodiment, the center of the mounting points of the axle 30 and the brake assembly 41 is located on the central axis of the brake assembly 41. For example, after the axle 30 and the brake assembly 41 are assembled, when the axle 30 and the brake assembly 41 are mounted through one mounting point, the center of the mounting point is on the central axis of the brake assembly 41 along the first direction A; when there are multiple mounting points, the geometric center of the multiple mounting points is on the central axis of the brake assembly 41 along the first direction A. For example, when the connecting lines of the multiple mounting points form a triangle, the center of the triangle is on the central axis of the brake assembly 41. Therefore, the center of the mounting points is located on the central axis of the brake assembly 41, which can facilitate the mounting of the brake assembly 41 and the axle 30, improve the stability of the mounting, and improve the structural strength.

[0059] According to some embodiments of the present application, as shown in Figure 1 The chassis system 100 further comprises a leaf spring assembly 10, the leaf spring assembly 10 is arranged at two ends of the axle 30, and the leaf spring assembly 10 is arranged on the axle 30 and is adapted to be connected with the vehicle frame.

[0060] That is, the leaf spring assembly 10 is arranged at two ends of the axle 30 along the first direction A of the vehicle, and the leaf spring assembly 10 is arranged above the axle 30 along the third direction C of the vehicle, wherein the leaf spring assembly 10 is adapted to connect the axle 30 and the vehicle frame in a suspended manner.

[0061] Therefore, the leaf spring assembly 10 is arranged at two ends of the axle 30, and the leaf spring assembly 10 is arranged on the axle 30, which can effectively improve the space utilization between the leaf spring assembly 10 and the vehicle frame, facilitate the deflection of the vehicle frame following the jumping of the leaf spring assembly 10 during vehicle driving, provide damping effect for the chassis system 100, and improve the driving comfort.

[0062] According to some embodiments of the present application, as shown in Figure 3 The leaf spring assembly 10 comprises a leaf spring 11 and a mounting bracket 12, the leaf spring 11 is arranged on the axle 30; the mounting bracket 12 is arranged at an end of the leaf spring 11 along the length direction of the vehicle, one end of the mounting bracket 12 is connected with the leaf spring 11, and the other end of the mounting bracket 12 is adapted to be connected with the vehicle frame.

[0063] In combination with Figure 3, the leaf spring 11 of the leaf spring assembly 10 extends along the second direction B and is arranged at intervals along the first direction A, the leaf spring 11 is arranged above the axle 30 along the third direction C of the vehicle, in the embodiment, the mounting bracket 12 comprises a front mounting bracket 121 and a rear mounting bracket 122, the front mounting bracket 121 and the rear mounting bracket 122 are arranged at two ends of the leaf spring 11 along the second direction B respectively, and the leaf spring 11 and the mounting bracket 12 are flexibly connected through the connecting piece. The flexible connection is a connection form that the center point of the connecting piece cannot be displaced and slid, and allows torsion, deflection and radial elastic deformation to occur.

[0064] Therefore, the leaf spring 11 is arranged above the axle 30 along the third direction C of the vehicle, and the mounting bracket 12 is connected with the leaf spring 11 and the frame respectively, so that the axle 30 can be connected with the frame through the leaf spring 11 and the mounting bracket 12, the attenuation of the body vibration is promoted, the stability of the vehicle operation is maintained, the comfort of the vehicle is improved, meanwhile, the wear between the leaf spring 11 and the mounting bracket 12 is reduced, the service life of the leaf spring assembly 10 is prolonged, and the assembly efficiency and reliability of the leaf spring assembly 10 are improved.

[0065] According to some embodiments of the utility model, as shown in Figure 3 and Figure 4 The leaf spring assembly 10 further comprises a bushing 13 arranged between the leaf spring 11 and the mounting bracket 12, and the leaf spring 11 and the mounting bracket 12 are rotatably connected through the bushing 13.

[0066] In the embodiment, the bushing 13 comprises an outer shell 132, an inner shell 131 and a flexible piece 133 arranged between the outer shell 132 and the inner shell 131, wherein the inner shell 131 extends along the first direction A, and one end of the inner shell 131 adjacent to the mounting bracket 12 is fixedly connected with the mounting bracket 12 through the connecting piece, the cross-sectional shape of the inner shell 131 is a circular ring, and the connecting piece is a pin or a bolt, which is arranged in the inner shell 131 along the first direction A and fixed on the mounting bracket 12; the outer shell 132 is arranged at intervals with the inner shell 131, and the flexible piece 133 such as vulcanized rubber is arranged between the outer shell 132 and the inner shell 131, the outer shell 132 is sleeved on the outer side of the inner shell 131, the outer shell 132 is connected with one end of the leaf spring 11 adjacent to the mounting bracket 12 through the auxiliary adhesive, and the outer shell 132 and the inner shell 131 can rotate relative to each other.

[0067] Therefore, by arranging the bushing 13 between the leaf spring 11 and the mounting bracket 12, the wear between the leaf spring 11 and the mounting bracket 12 can be reduced, the possibility of noise and abnormal sound generated by friction between the leaf spring 11 and the mounting bracket 12 can be reduced, the flexible piece 133 arranged between the inner shell 131 and the outer shell 132 can avoid wear between the inner shell 131 and the outer shell 132, the service life of the bushing 13 can be prolonged, the connection strength between the leaf spring 11 and the mounting bracket 12 can be improved, and therefore the service life of the chassis system 100 can be prolonged, and the safety and reliability of the chassis system 100 can be improved.

[0068] Secondly, the leaf spring 11 and the mounting bracket 12 are flexibly connected only through the bushing 13, so that the rigidity of the leaf spring assembly 10 can realize linear rigidity characteristics in a small range, the space utilization of the chassis system 100 is ensured, and the comfort of the whole vehicle when being unloaded is ensured. When the load borne by the leaf spring 11 reaches a certain load, the rigidity of the leaf spring 11 presents a trend of smooth and gradual rigidity.

[0069] In combination Figure 7 When the load of the whole vehicle gradually increases in the range of 0-32500N, the deformation of the leaf spring 11 changes in the range of -10mm-220mm, and although the deformation of the leaf spring 11 gradually increases with the increase of the load, the change amount of the deformation of the leaf spring 11 per unit load gradually decreases, the slope of the formed curve gradually increases, and the hardness of the leaf spring 11 increases. Therefore, the whole vehicle basically presents equal frequency characteristics in the case of loading different loads, the comfort and the carrying capacity can be considered, and the lateral control performance of the vehicle in turning can be effectively improved. Moreover, the rigidity requirement can be realized by adapting the length, width and thickness of the leaf spring 11 according to the design load tonnage of the vehicle, and the adjustment point of the gradual rigidity change in a certain range can be realized by adjusting the internal structure of the leaf spring 11, and the size or rigidity of the end bushing 13 can be selected according to the actual dynamic performance and NVH performance target, so as to realize the optimal adaptive performance.

[0070] According to some embodiments of the utility model, the bushing 13 is a metal-rubber composite bushing.

[0071] In the embodiment, the inner shell 131 and the outer shell 132 in the bushing 13 are metal pieces, the flexible piece 133 between the inner shell 131 and the outer shell 132 is a rubber piece, and the inner shell 131, the outer shell 132 and the flexible piece 133 between the inner shell 131 and the outer shell 132 jointly constitute a metal-rubber composite bushing. The size and rigidity of the bushing 13 can be selected according to the actual dynamic performance and NVH performance target, so as to realize the optimal adaptive performance.

[0072] Therefore, the bushing 13 is a metal-rubber composite bushing, which facilitates maintenance and replacement of the bushing 13, reduces production cost of the bushing 13, is easy to process, improves processing efficiency of the bushing 13, is low in price, and realizes economization, thereby effectively improving adaptability and practicality of the bushing 13.

[0073] According to some embodiments of the present application, Figure 2 As shown in the drawings, the leaf spring 11 comprises a first leaf spring segment 111, a second leaf spring segment 112 and a third leaf spring segment 113 connected in sequence, and the first leaf spring segment 111 and the third leaf spring segment 113 are both inclined and curved to extend upward relative to the second leaf spring segment 112.

[0074] In combination with Figure 2 The two ends of the second leaf spring segment 112 along the second direction B are connected to the ends of the first leaf spring segment 111 and the third leaf spring segment 113 adjacent to each other, and the ends of the first leaf spring segment 111 and the third leaf spring segment 113 away from each other along the second direction B are connected to the bushings 13 on the front mounting bracket 121 and the rear mounting bracket 122 respectively. In this embodiment, the first leaf spring segment 111 and the third leaf spring segment 113 are both curved upward and then downward along the third direction C of the vehicle, so that the leaf spring 11 presents a structure similar to an "S shape". In this application, the first leaf spring segment 111 is located in front of the second leaf spring segment 112, the third leaf spring segment 113 is located behind the second leaf spring segment 112, and the overall height of the third leaf spring segment 113 along the third direction C is greater than the overall height of the first leaf spring segment 111, so as to provide greater load at the position opposite to the third leaf spring segment 113 of the whole vehicle, and increase the supporting performance and rigidity of the leaf spring 11.

[0075] Therefore, the first leaf spring segment 111 and the third leaf spring segment 113 are both inclined and curved to extend upward relative to the second leaf spring segment 112, so that the leaf spring 11 presents a structure similar to an "S shape", and the leaf spring 11 can realize different amplitude of deflection according to different loading load. In the process of driving the vehicle, the axle 30 can fully utilize the space between the vehicle body and the leaf spring 11 for up and down jumping, thereby improving the vehicle body arrangement space.

[0076] Further, as shown in the drawings, Figure 2 The highest point of the first leaf spring segment 111 is lower than the highest point of the third leaf spring segment 113.

[0077] That is, the highest point of the first leaf spring segment 111 along the third direction C of the vehicle is lower than the highest point of the third leaf spring segment 113 along the third direction C of the vehicle, and the inclination angle of the third leaf spring segment 113 relative to the second leaf spring segment 112 is greater than the inclination angle of the first leaf spring segment 111 relative to the second leaf spring segment 112. In this embodiment, the curvature radius of the first leaf spring segment 111 and the third leaf spring segment 113 can be adjusted according to actual needs, so as to improve the stability of driving the vehicle, the riding comfort and the carrying capacity.

[0078] Therefore, the highest point of the first leaf spring section 111 is lower than the highest point of the third leaf spring section 113, and when the third leaf spring section 113 of the axle 30 is stressed, the third leaf spring section 113 can provide a larger elastic deformation space, thereby achieving a better buffering effect, improving the comfort and carrying capacity of the vehicle, prolonging the service life of the chassis system 100, and improving the reliability and stability of the chassis system 100. At the same time, considering the weight difference between the front and rear of the vehicle, the highest point of the rear third leaf spring section 113 is set high to balance the height of the front and rear of the vehicle and increase the stability of the vehicle.

[0079] According to some embodiments of the present application, the thickness of the first leaf spring section 111 is less than the thickness of the second leaf spring section 112, and the thickness of the third leaf spring section 113 is less than the thickness of the second leaf spring section 112; or the width of the first leaf spring section 111 is greater than the width of the second leaf spring section 112, and the width of the third leaf spring section 113 is greater than the width of the second leaf spring section 112; or, the thickness of the first leaf spring section 111 is less than the thickness of the second leaf spring section 112, and the thickness of the third leaf spring section 113 is less than the thickness of the second leaf spring section 112, and at the same time, the width of the first leaf spring section 111 is greater than the width of the second leaf spring section 112, and the width of the third leaf spring section 113 is greater than the width of the second leaf spring section 112.

[0080] For example, the thickness of the second leaf spring section 112 in the third direction C of the chassis system 100 is greater than the thickness of the first leaf spring section 111 and the third leaf spring section 113 in the third direction C of the chassis system 100.

[0081] In this embodiment, the thickness of the first leaf spring section 111 is less than the thickness of the second leaf spring section 112, and the thickness of the third leaf spring section 113 is less than the thickness of the second leaf spring section 112, and at the same time, the width of the first leaf spring section 111 is greater than the width of the second leaf spring section 112, and the width of the third leaf spring section 113 is greater than the width of the second leaf spring section 112, which can adjust the length, width and thickness of the leaf spring 11 according to the tonnage requirement of the vehicle load.

[0082] Therefore, the width of the second leaf spring section 112 is less than the width of the first leaf spring section 111 and the third leaf spring section 113, facilitating the connection of the second leaf spring section 112 and the axle 30, and the thickness of the second leaf spring section 112 is greater than the thickness of the first leaf spring section 111 and the third leaf spring section 113, so that the second leaf spring section 112 has a higher structural strength, increasing the ability of the leaf spring 11 to resist deformation and torsion in the third direction C, and at the same time, due to the larger thickness design of the second leaf spring section 112, the first leaf spring section 111 and the third leaf spring section 113 can be combined to form a non-equal-width and variable-section structure of the leaf spring 11, thereby achieving an optimal stress level of the leaf spring 11, and at the same time, the leaf spring 11 can adapt to different loading loads of the vehicle, prolonging the service life of the leaf spring 11.

[0083] According to some embodiments of the present application, the leaf spring 11 is a gradually changing stiffness leaf spring.

[0084] Since the two ends of the leaf spring 11 are connected with the bushing 13 along the second direction B, and the leaf spring 11 is a gradually changing stiffness leaf spring, the stiffness of the leaf spring 11 can realize linear stiffness characteristics in a small range. When the load of the leaf spring 11 reaches a certain load, the stiffness of the leaf spring 11 can present a smooth gradually changing stiffness trend. In this embodiment, the gradually changing stiffness is variable, but nonlinearly changes, mostly changes in a curve rule, and can present an equal stiffness rule performance in a small range.

[0085] Therefore, the leaf spring 11 is a gradually changing stiffness leaf spring, the structure is relatively simple, the vehicle can basically present equal frequency characteristics in the case of loading different loads, the comfort of the vehicle when unloaded is improved, the carrying capacity of the vehicle is improved, the turning lateral control performance of the vehicle is effectively improved, and the safety and reliability of the chassis system 100 are improved.

[0086] According to some embodiments of the present application, as shown in Figure 6 The axle 30 further comprises a support piece 46, the support piece 46 is arranged at the end of the axle 30, and the support piece 46 extends along the length direction of the vehicle. Further, the leaf spring assembly 10 is connected with the support piece 46.

[0087] That is, the support piece 46 is arranged at one end of the two second axle sections 32 away from the first axle section 31, the support piece 46 extends along the second direction B of the vehicle, and the support piece 46 is suitable for supporting the leaf spring 11. Therefore, arranging the support piece 46 at one end of the second axle section 32 away from the first axle section 31 can facilitate increasing the area of the contact between the axle 30 and the leaf spring 11, improving the stability of the installation of the leaf spring 11 and the connection strength between the leaf spring assembly 10 and the axle 30. At the same time, increasing the support of the support piece 46 to the leaf spring 11 can further increase the ability of the leaf spring 11 to resist deformation under stress.

[0088] In this embodiment, the second leaf spring section 112 is arranged above the support piece 46 along the third direction C of the vehicle and is connected with the support piece 46, which can improve the structural strength of the second leaf spring section 112, prolong the service life of the second leaf spring section 112, and improve the connection strength between the second leaf spring section 112 and the axle 30.

[0089] According to some embodiments of the present application, as shown in Figure 5 The chassis system 100 further comprises a pressing plate 40 and a fastener 45, the pressing plate 40 is arranged at one side of the leaf spring assembly 10 away from the support piece 46 along the third direction C of the vehicle; and the fastener 45 penetrates the pressing plate 40, the leaf spring assembly 10 and the support piece 46 to fix the leaf spring 11 between the pressing plate 40 and the axle 30.

[0090] Optionally, the pressing plate 40 is arranged on the second side of the second leaf spring section 112 away from the support 46 along the third direction C of the vehicle, the second leaf spring section 112 is arranged between the pressing plate 40 and the support 46, and the fastener 45 is adapted to pass through the pressing plate 40, the second leaf spring section 112 and the support 46 in sequence to connect the leaf spring assembly 11 and the axle 30. In the embodiment, the fastener 45 can be a U-shaped bolt, also known as a horse bolt.

[0091] Therefore, the fastener 45 passes through the pressing plate 40, the leaf spring assembly 10 and the support 46, which can avoid relative movement between the leaf spring assembly 10 and the axle 30, improve the connection strength of the leaf spring assembly 10 and the axle 30, improve the reliability of the chassis system 100, avoid wear between the leaf spring assembly 10 and the axle 30, prolong the service life of the leaf spring assembly 10, and facilitate assembly and disassembly of the leaf spring assembly 10 and the axle 30, thereby improving the assembly efficiency of the chassis system 100.

[0092] According to some embodiments of the present application, as shown in Figure 1 The chassis system 100 further comprises a power structure 20, at least part of the power structure 20 is located in the avoiding space.

[0093] In the embodiment, at least part of the power structure 20 is arranged in the avoiding space defined by the first axle section 31 and the two second axle sections 32, and the power structure 20 is spaced apart from the first axle section 31 along the second direction B of the vehicle, and the power structure 20 is adapted to provide power for vehicle driving. Therefore, at least part of the power structure 20 is located in the avoiding space, which can avoid collision between the power structure 20 and the axle 30, improve the safety and reliability of the chassis system 100, and at the same time, can fully utilize the arrangement space between the frame and the axle 30, effectively improve the space utilization rate of the chassis system 100.

[0094] According to some embodiments of the present application, as shown in Figure 1 and Figure 6 The power structure 20 comprises a driving motor 22 and a transmission shaft 21, the driving motor 22 is adapted to be connected with the frame, one end of the transmission shaft 21 is connected with the driving motor 22, and the other end of the transmission shaft 21 is connected with the wheel structure.

[0095] Optionally, the transmission shaft 21 is arranged on both sides of the driving motor 22 along the first direction A, and extends away from the driving motor 22 along the first direction A and passes through the brake assembly 41 and the wheels included in the wheel structure, wherein the driving motor 22 is connected with the transmission shaft 21 and the frame respectively, the driving motor 22 is adapted to provide driving force for the transmission shaft 21, and the transmission shaft 21 is adapted to transmit the driving force generated by the driving motor 22 to the wheels to drive the vehicle to run. In the embodiment, the transmission shaft 21 is multi-sectioned, and the transmission shaft 21 can move together with the leaf spring assembly 10.

[0096] Thus, one end of the transmission shaft 21 is connected with the driving motor 22, and the other end of the transmission shaft 21 is connected with the wheel structure, and in the process of driving the vehicle, the transmission shaft 21 can be conveniently deflected and rotated with the jumping of the leaf spring assembly 10, the shock absorption effect of the chassis system 100 is provided, and the driving comfort can be improved.

[0097] According to some embodiments of the utility model, the chassis system 100 further includes a power structure 20, and in the height direction of the vehicle, the transmission shaft 21 of the power structure 20 is arranged above the leaf spring assembly 10 at the end adjacent to the wheel structure.

[0098] In the embodiment, the transmission shaft 21 includes a first transmission shaft segment and a second transmission shaft segment, the first transmission shaft segment is arranged adjacent to the wheel structure, and the second transmission shaft segment is arranged adjacent to the power structure 20. When the vehicle is in a static state, the leaf spring assembly 10 is in a static state, and the first transmission shaft segment and the second transmission shaft segment are both above the leaf spring assembly 10 along the third direction C of the vehicle; when the vehicle is in a driving state, the leaf spring assembly 10 dynamically jumps, the first transmission shaft segment adjacent to the wheel structure jumps up and down with the leaf spring 11 and is still above the leaf spring assembly 10, and the second transmission shaft segment adjacent to the power structure 20 can jump below the leaf spring assembly 10 or the axle 30.

[0099] Thus, by arranging the end of the transmission shaft 21 adjacent to the wheel structure above the leaf spring assembly 10, in the process of driving the vehicle, due to the segmented design of the transmission shaft 21, the end of the transmission shaft 21 adjacent to the power structure 20 can jump below the leaf spring assembly 10, the transmission shaft 21 jumps up and down with the leaf spring 11, the space utilization between the leaf spring 11 and the vehicle frame can be improved, the vehicle body posture and the overall height can be reduced, the flexibility of the transmission shaft 21 can be improved, and the stability of the chassis system 100 can be improved.

[0100] In another optional embodiment, the axle 30 is arranged below the leaf spring assembly 10. The axle 30 is arranged below the leaf spring 11 along the third direction C of the vehicle, which facilitates to provide support for the installation of the leaf spring 11, the height and the gravity center of the vehicle can be further reduced, and the stability of the vehicle can be improved.

[0101] According to some embodiments of the utility model, as shown in Figure 1 The axle 30 further includes a connecting plate 42, the connecting plate 42 is arranged on the side of the support 46 away from the axle 30, and the chassis system 100 further includes a brake assembly 41, and the brake assembly 41 is connected with the connecting plate 42.

[0102] That is, the connecting plate 42 is arranged on the side of the support 46 away from the second axle section 32 along the first direction A, and the brake assembly 41 is sleeved on the end of the transmission shaft 21 away from the driving motor along the first direction A, and the connecting plate 42 and the brake assembly 41 are connected by bolts, so that the brake assembly 41 is connected with the connecting plate 42 by arranging the connecting plate 42 on the side of the support 46 away from the second axle section 32, and the arrangement of the connecting plate 42 facilitates the installation of the brake assembly 41, and improves the installation precision and reliability of the brake assembly 41.

[0103] In the embodiment, the chassis system 100 further comprises a limiting block 43, which can be arranged on the vehicle body or the axle 30, and the limiting block 43 is suitable for buffering and limiting the leaf spring assembly 10, wherein the limiting block 43 can be a rubber piece.

[0104] In addition, the chassis system 100 further comprises a shock absorber 44, which is arranged on both ends of the axle 30 along the first direction A and inclined towards the direction away from the axle 30 along the second direction B, and the shock absorber 44 is suitable for reducing the vibration of the axle 30, wherein the shock absorber 44 can be a double-cylinder hydraulic shock absorber 44 or a CDC adjustable damping shock absorber 44.

[0105] According to some embodiments of the present application, the connecting plate 42 and the axle 30 are integrally formed.

[0106] In the embodiment, the connecting plate 42 and the axle 30 are integrally formed by a processing technology, which can improve the structural strength of the connecting plate 42 and the axle 30, and improve the processing efficiency of the connecting plate 42 and the axle 30, effectively improve the processing precision and production quality of the connecting plate 42 and the axle 30, prolong the service life of the chassis system 100, reduce the processing cost of the connecting plate 42 and the axle 30, and meet the mass production demand of the connecting plate 42 and the axle 30.

[0107] According to the vehicle of the second aspect of the present application, the chassis system 100 of any one of the first aspect of the present application is included.

[0108] In the embodiment, the avoidance space is defined by the first axle section 31 and the two second axle sections 32, at least part of the driving motor 22 is arranged in the avoidance space, and the leaf spring 11 is arranged between the transmission shaft 21 and the axle 30, so that the space utilization between the leaf spring assembly 10 and the vehicle body can be effectively improved, the space utilization of the vehicle is improved, and the cargo carrying capacity of the vehicle is improved; the bushings 13 are arranged on the two ends of the leaf spring 11 along the second direction B and the mounting bracket 12, so that the wear of the leaf spring assembly 10 can be reduced, the noise can be reduced, and the NVH performance of the vehicle is improved; by adopting the gradually changing stiffness type leaf spring 11, the loading performance of the vehicle is improved, the comfort of the vehicle is improved, and the control performance of the vehicle in the lateral direction is improved; meanwhile, the lightweight design of the vehicle can be realized, the assembly of the structural parts is simplified, the production efficiency of the vehicle is improved, the production cost of the vehicle is reduced, the service life of the vehicle is prolonged, the safety of the vehicle is improved, the maintenance cost and the energy consumption are reduced.

[0109] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0110] In the description of the utility model, "first feature" and "second feature" can include one or more features.In the description of the utility model, "multiple" means two or more.In the description of the utility model, "above" or "below" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them.In the description of the utility model, "above", "above" and "above" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height.

[0111] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model.In the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example.

[0112] Although the embodiments of the utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A chassis system (100), characterized in that, include: The axle (30) extends along the width direction of the vehicle, and both ends of the axle (30) are adapted to mount wheel structures. At least a portion of the axle (30) protrudes along one side of the length direction of the vehicle to form a clearance space, which is adapted to avoid the power structure (20).

2. The chassis system (100) according to claim 1, characterized in that, The axle (30) includes: First section of the bridge (31); Two second axle sections (32), one end of which is adapted to be connected to the wheel structure, and the other end of which is connected to the first axle section (31). The two second axle sections (32) are inclined and located at both ends of the first axle section (31) along the vehicle width direction. The first axle section (31) and the second axle sections (32) define the clearance space.

3. The chassis system (100) according to claim 2, characterized in that, Along the length of the vehicle, the two second axle segments (32) are located on the same side where the first axle segment (31) is connected.

4. The chassis system (100) according to claim 2, characterized in that, Also includes: A brake assembly (41) is located at both ends of the axle (30), and the center of the mounting point between the axle (30) and the brake assembly (41) is located below the central axis of the brake assembly (41); or, The center of the mounting point of the axle (30) and the brake assembly (41) is located on the central axis of the brake assembly (41).

5. The chassis system (100) according to claim 1, characterized in that, Also includes: Leaf spring assembly (10), the leaf spring assembly (10) is disposed at both ends of the axle (30), the leaf spring assembly (10) is disposed on the axle (30) and is adapted to be connected to the frame.

6. The chassis system (100) according to claim 5, characterized in that, The leaf spring assembly (10) includes: Leaf spring (11), the leaf spring (11) is disposed on the axle (30); Mounting bracket (12) is located at the end of the leaf spring (11) along the length direction of the vehicle. One end of the mounting bracket (12) is connected to the leaf spring (11), and the other end of the mounting bracket (12) is adapted to be connected to the vehicle frame.

7. The chassis system (100) according to claim 6, characterized in that, The leaf spring assembly (10) further includes: A bushing (13) is disposed between the leaf spring (11) and the mounting bracket (12), and the leaf spring (11) and the mounting bracket (12) are rotatably connected by the bushing (13).

8. The chassis system (100) according to claim 7, characterized in that, The bushing (13) is a metal-rubber composite bushing.

9. The chassis system (100) according to claim 6, characterized in that, The leaf spring (11) includes a first leaf spring segment (111), a second leaf spring segment (112) and a third leaf spring segment (113) connected in sequence. The first leaf spring segment (111) and the third leaf spring segment (113) are both inclined and bent upward relative to the second leaf spring segment (112).

10. The chassis system (100) according to claim 9, characterized in that, The highest point of the first leaf spring segment (111) is lower than the highest point of the third leaf spring segment (113).

11. The chassis system (100) according to claim 9, characterized in that, The thickness of the first leaf spring segment (111) is less than the thickness of the second leaf spring segment (112), and the thickness of the third leaf spring segment (113) is less than the thickness of the second leaf spring segment (112); and / or The width of the first leaf spring segment (111) is greater than the width of the second leaf spring segment (112), and the width of the third leaf spring segment (113) is greater than the width of the second leaf spring segment (112).

12. The chassis system (100) according to claim 6, characterized in that, The leaf spring (11) is a gradually changing stiffness leaf spring.

13. The chassis system (100) according to any one of claims 5-12, characterized in that, The axle (30) also includes: Support member (46) is provided at the end of the axle (30) and extends along the length of the vehicle.

14. The chassis system (100) according to claim 13, characterized in that, The leaf spring assembly (10) is connected to the support member (46).

15. The chassis system (100) according to claim 13, characterized in that, Also includes: Pressure plate (40), the pressure plate (40) is disposed along the height direction of the vehicle on the side of the leaf spring assembly (10) away from the support member (46); Fastener (45) passes through the pressure plate (40), the leaf spring assembly (10) and the support member (46) to fix the leaf spring (11) between the pressure plate (40) and the axle (30).

16. The chassis system (100) according to claim 5, characterized in that, Also includes: The power structure (20) is located at least part of the clearance space.

17. The chassis system (100) according to claim 16, characterized in that, The power structure (20) includes: A drive motor (22) adapted to be connected to the vehicle frame; A drive shaft (21) is provided, one end of which is connected to the drive motor (22), and the other end of which is connected to the wheel structure.

18. The chassis system (100) according to claim 5, characterized in that, Also includes: In the height direction of the vehicle, the drive shaft (21) of the power structure (20) is located above the leaf spring assembly (10) near the end of the wheel structure; and / or, The axle (30) is located below the leaf spring assembly (10).

19. The chassis system (100) according to claim 13, characterized in that, The axle further includes a connecting plate (42), which is disposed on the side of the support member (46) away from the axle (30); The chassis system also includes a brake assembly (41) which is connected to the connecting plate (42).

20. The chassis system (100) according to claim 19, characterized in that, The connecting plate (42) and the axle (30) are integrally formed.

21. A vehicle, characterized in that, Includes the chassis system (100) according to any one of claims 1-20.

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