Plate spring energy storage type electric drive axle lifting system

Abstract

The application provides a plate spring energy storage type electric drive axle lifting system, which comprises a vehicle frame, a plate spring assembly, a clamping assembly and an electric drive axle, the vehicle frame has two longitudinal beams, the plate spring assembly is movably connected to the two longitudinal beams at two ends respectively, and the plate spring assembly and the electric drive axle are connected through the clamping assembly, so that the electric drive axle can be lifted or lowered relative to the vehicle frame. The plate spring energy storage type electric drive axle lifting system of the embodiment of the application has the advantages that the plate spring occupies a smaller space, can be adapted to the narrow space around the electric drive axle, the up-and-down movement of the electric drive axle can be realized without arranging a lifting air bag, and the normal use of the electric drive axle is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle suspension, in particular to a leaf spring energy storage type electric drive axle lifting system. BACKGROUND

[0002] The main load-bearing element of the air suspension is the air spring (air bag), which has the advantages of low frequency, good vehicle smoothness, constant chassis height under no load and full load, and adjustable chassis height, and is widely used in heavy trucks; for pure electric heavy trucks, electric drive axle is an important technical route, the drive motor and reducer are integrated on both sides of the electric drive axle, there is no transmission shaft between the two electric drive axles, when the vehicle is unloaded, if one of the electric drive axles can be lifted off the ground and only the other electric drive axle is used for driving, the power consumption can be effectively saved and the tire wear can be reduced, however, due to the large space occupied by the motor and the reducer on both sides of the electric drive axle, the traditional lifting air bag cannot be arranged, thereby limiting the lifting function of the electric drive axle, therefore, a structure is needed to realize the lifting of the electric drive axle without increasing the additional space requirement. SUMMARY

[0003] The present application provides a leaf spring energy storage type electric drive axle lifting system to solve the problem of limited lifting of the electric drive axle due to small installation space around the electric drive axle in the prior art, and to realize the lifting of the electric drive axle by using a small volume leaf spring.

[0004] The present application provides a leaf spring energy storage type electric drive axle lifting system, comprising:

[0005] A vehicle frame having two longitudinal beams;

[0006] A leaf spring assembly, both ends of the leaf spring assembly are movably connected with the two longitudinal beams;

[0007] A clamping assembly and an electric drive axle, the leaf spring assembly and the electric drive axle are connected through the clamping assembly, so that the electric drive axle is raised or lowered relative to the vehicle frame.

[0008] In some embodiments, the clamping assembly comprises a first clamping piece and a second clamping piece, the first clamping piece is connected with the vehicle frame, the first clamping piece has a first clamping surface, the second clamping piece is connected with the top of the electric drive axle, and the second clamping piece has a second clamping surface;

[0009] The leaf spring assembly comprises a leaf spring, the leaf spring is clamped between the first clamping surface and the second clamping surface.

[0010] In some embodiments, the first clamping surface comprises a first planar region and two first avoiding regions, the two first avoiding regions are arranged on both sides of the first planar region in the extension direction of the leaf spring;

[0011] The second clamping surface comprises a second planar region and two second relief regions, and the two second relief regions are arranged on both sides of the second planar region in the extension direction of the leaf spring;

[0012] The first planar region and the second planar region are oppositely arranged and respectively attached to two surfaces of the leaf spring, and the two first relief regions and the two second relief regions are correspondingly arranged and spaced apart from the surfaces of the leaf spring.

[0013] In some embodiments, the first relief region gradually bends away from the surface of the leaf spring in the direction away from the first planar region;

[0014] The second relief region gradually bends away from the surface of the leaf spring in the direction away from the second planar region.

[0015] In some embodiments, the leaf spring assembly comprises two connecting components, and the two connecting components are respectively arranged at two ends of the leaf spring, and the leaf spring is rotatably connected to the longitudinal beams through the connecting components.

[0016] In some embodiments, the connecting component comprises:

[0017] A bushing, an axis of the bushing is consistent with the extension direction of the longitudinal beam, the bushing comprises an outer shell and an inner shell, the inner shell is arranged in the outer shell and is rotatable relative to the outer shell, the bushing comprises an upper bushing and a lower bushing, the outer shell of the upper bushing is fixedly connected to the longitudinal beam, and the outer shell of the lower bushing is fixedly connected to the leaf spring;

[0018] A hanger plate, one end of the hanger plate is fixedly connected to the inner shell of the upper bushing, and the other end of the hanger plate is fixedly connected to the inner shell of the lower bushing.

[0019] In some embodiments, the two ends of the leaf spring are respectively provided with annular portions, and the annular portions are fixedly connected to the outer shell of the lower bushing.

[0020] In some embodiments, the leaf spring energy storage type electric drive bridge lifting system comprises a linkage assembly, and the linkage assembly and the electric drive bridge are respectively arranged on both sides of the clamping assembly;

[0021] The linkage assembly comprises a first rod and a second rod, one end of the first rod and one end of the second rod are rotatably connected to the two longitudinal beams respectively, and the other end of the first rod and the other end of the second rod are rotatably connected to the first clamping piece.

[0022] In some embodiments, the leaf spring energy storage type electric drive axle lifting system comprises a connecting shaft, one end of the connecting shaft is fixedly connected with the first clamping piece, and the first rod and the second rod are hingedly connected with the connecting shaft.

[0023] In some embodiments, the leaf spring energy storage type electric drive axle lifting system comprises a load bearing air bag, the load bearing air bag is connected with the vehicle frame, and a plurality of load bearing air bags are arranged at intervals.

[0024] The leaf spring energy storage type electric drive axle lifting system provided by the embodiment of the present application occupies a small space, thereby being able to adapt to the narrow space around the electric drive axle, and realizing the up and down movement of the electric drive axle without arranging a lifting air bag, thereby ensuring the normal use of the electric drive axle. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0026] Figure 1 is a structural schematic view of the leaf spring energy storage type electric drive axle lifting system provided by the present application.

[0027] Figure 2 is a sectional schematic view of the leaf spring energy storage type electric drive axle lifting system provided by the present application.

[0028] Figure 3 is a structural schematic view of the bushing of the leaf spring energy storage type electric drive axle lifting system provided by the present application.

[0029] Figure 4 is a structural schematic view of the leaf spring assembly of the leaf spring energy storage type electric drive axle lifting system provided by the present application in a free state and a stressed state.

[0030] Figure 5 is a schematic view of the leaf spring energy storage type electric drive axle lifting system provided by the present application in an initial assembly state.

[0031] Figure 6 is a schematic view of the leaf spring energy storage type electric drive axle lifting system provided by the present application in an electric drive axle lifting state.

[0032] Figure 7 is a schematic view of the leaf spring energy storage type electric drive axle lifting system provided by the present application in a full load state.

[0033] Figure 8It is the structural schematic view of the connection place of the clamping assembly and the leaf spring of the leaf spring energy storage type electric drive axle lifting system provided by the application.

[0034] Figure 9 It is the cross-sectional structural schematic view of the bushing of the leaf spring energy storage type electric drive axle lifting system provided by the application.

[0035] Reference signs:

[0036] 1, frame; 11, longitudinal beam; 111, limiting block; 2, leaf spring assembly; 21, leaf spring; 211, annular part; 212, reinforcing part; 22, connecting part; 221, upper bushing; 222, lower bushing; 23, bushing; 231, outer shell; 232, inner shell; 233, rubber layer; 24, hanging plate; 3, clamping assembly; 31, first clamping part; 311, first clamping surface; 3111, first planar area; 3112, first avoiding area; 32, second clamping part; 321, second clamping surface; 3211, second planar area; 3212, second avoiding area; 4, electric drive axle; 5, connecting rod assembly; 51, first rod; 52, second rod; 6, connecting shaft; 7, load air bag. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0038] As shown in Figures 1 to 9 , the embodiments of the present application disclose a leaf spring energy storage type electric drive axle lifting system, which comprises a frame 1, a leaf spring assembly 2, a clamping assembly 3 and an electric drive axle 4.

[0039] The frame 1 has two longitudinal beams 11.

[0040] The two ends of the leaf spring assembly 2 are movably connected with the two longitudinal beams 11 respectively.

[0041] The leaf spring assembly 2 and the electric drive axle 4 are connected through the clamping assembly 3, so that the electric drive axle 4 can be raised or lowered relative to the frame 1.

[0042] For the convenience of description, the up-down direction, the left-right direction and the front-rear direction are shown as Figure 1 .

[0043] The frame 1 has two longitudinal beams 11 arranged in the left-right direction, the extension direction of the longitudinal beams 11 is consistent with the front-rear direction, the leaf spring assembly 2 has a leaf spring 21, the extension direction of the leaf spring 21 is consistent with the left-right direction, both ends of the leaf spring 21 are connected with the two longitudinal beams 11 respectively, and the leaf spring 21 is movably connected with the longitudinal beams 11, so that the leaf spring 21 can move in the up-down direction relative to the longitudinal beams 11. The electric drive axle 4 is arranged below the frame 1, the leaf spring 21 and the electric drive axle 4 are connected through the clamping assembly 3, and the leaf spring 21 can arch upward or arch downward, so as to adapt to the lifting of the electric drive axle 4.

[0044] In the related art, because the motors and the transmissions on both sides of the electric drive axle occupy a large space, the traditional lifting air bag cannot be arranged, thereby limiting the lifting function of the electric drive axle.

[0045] The leaf spring energy storage type electric drive axle lifting system of the embodiment of the present application has a small space occupied by the leaf spring 21, so as to adapt to the narrow space around the electric drive axle 4, so that the electric drive axle 4 can move up and down, thereby realizing the lifting of the electric drive axle 4. The up and down movement of the electric drive axle 4 can be realized without arranging the lifting air bag, thereby ensuring the normal use of the electric drive axle 4.

[0046] In some embodiments, the clamping assembly 3 includes a first clamping piece 31 and a second clamping piece 32, the first clamping piece 31 is connected with the frame 1, the first clamping piece 31 has a first clamping surface 311, and the second clamping piece 32 is connected with the top of the electric drive axle 4, and the second clamping piece 32 has a second clamping surface 321.

[0047] The leaf spring assembly 2 includes the leaf spring 21, and the leaf spring 21 is clamped between the first clamping surface 311 and the second clamping surface 321.

[0048] For example, as shown in Figure 2 The first clamping piece 31 is arranged above the second clamping piece 32, the first clamping surface 311 of the first clamping piece 31 is arranged downward, and the second clamping surface 321 of the second clamping piece 32 is arranged upward.

[0049] The leaf spring 21 is clamped between the first clamping surface 311 and the second clamping surface 321, for example, threaded holes are arranged on the first clamping surface 311, the leaf spring 21 and the second clamping surface 321, and the first clamping surface 311, the leaf spring 21 and the second clamping surface 321 are fixed together by using bolts, so that the leaf spring 21 and the electric drive axle 4 can be closely connected together.

[0050] Optionally, in order to ensure the structural strength, the first clamping surface 311 is provided with a first abutting surface on both sides thereof, and the first clamping surface 311 is higher than the first abutting surface. The second clamping surface 321 is provided with a second abutting surface on both sides thereof, and the second clamping surface 321 is lower than the second abutting surface. The first abutting surface and the second abutting surface can be closely abutted. For example, a plurality of threaded holes are arranged on the first abutting surface and the second abutting surface, and the first abutting surface and the second abutting surface are connected by bolts.

[0051] In some embodiments, the first clamping surface 311 comprises a first planar region 3111 and a first avoiding region 3112, and two first avoiding regions 3112 are arranged on both sides of the first planar region 3111 in the extension direction of the leaf spring 21.

[0052] The second clamping surface 321 comprises a second planar region 3211 and a second avoiding region 3212, and two second avoiding regions 3212 are arranged on both sides of the second planar region 3211 in the extension direction of the leaf spring 21.

[0053] The first planar region 3111 and the second planar region 3211 are oppositely arranged and respectively abut the two surfaces of the leaf spring 21, and the two first avoiding regions 3112 and the two second avoiding regions 3212 correspond to each other and are both arranged in a spaced manner with the surfaces of the leaf spring 21.

[0054] For example, as shown in Figs. 1 and 2, the two sides in the extension direction of the leaf spring 21 are the left side and the right side. The left side and the right side of the first planar region 3111 are both the first avoiding region 3112, and the left side and the right side of the second planar region 3211 are both the second avoiding region 3212. Figure 2 Figure 8 For example, as shown in Figs. 1 and 2, the two sides in the extension direction of the leaf spring 21 are the left side and the right side. The left side and the right side of the first planar region 3111 are both the first avoiding region 3112, and the left side and the right side of the second planar region 3211 are both the second avoiding region 3212.

[0055] The first planar region 3111 and the second planar region 3211 are oppositely arranged in the up-down direction, so as to clamp the leaf spring 21 between the first planar region 3111 and the second planar region 3211. Since the surfaces of the first planar region 3111 and the second planar region 3211 are both planar, the surfaces of the first planar region 3111 and the second planar region 3211 can be closely abutted with the surfaces of the leaf spring 21, which not only ensures the stability of the leaf spring 21 when bearing the load, but also reduces the stress concentration and unnecessary wear caused by uneven surfaces.

[0056] ​The first left avoidance area 3112 corresponds to the second left avoidance area 3212, the first right avoidance area 3112 corresponds to the second right avoidance area 3212, and the first avoidance area 3112 and the second avoidance area 3212 are both arranged away from the surface of the leaf spring 21. On the one hand, such arrangement ensures that the leaf spring 21 can move flexibly within the normal working range without being hindered or limited by the first avoidance area 3112 or the second avoidance area 3212. When the vehicle encounters different road conditions and load changes during driving, the leaf spring 21 can deform rapidly as needed to absorb shocks and transmit power, thereby ensuring the smooth up-and-down movement of the electric drive axle 4. On the other hand, when the moving amplitude of the leaf spring 21 is large, such as significant bending under extreme load conditions, the first avoidance area 3112 and the second avoidance area 3212 can function as a limit to effectively limit the bending amplitude of the leaf spring 21, preventing it from deforming excessively or even bending, thereby protecting the leaf spring 21 from permanent damage.

[0057] Optionally, the leaf spring 21 is provided with two reinforcing members 212 corresponding to the first planar area 3111 and the second planar area 3211, thereby strengthening the structural strength of the leaf spring 21.

[0058] In some embodiments, the first avoidance area 3112 gradually bends away from the surface of the leaf spring 21 in a direction away from the first planar area 3111.

[0059] The second avoidance area 3212 gradually bends away from the surface of the leaf spring 21 in a direction away from the second planar area 3211.

[0060] For example, as shown in FIG. 3, the surface of the first avoidance area 3112 and the surface of the second avoidance area 3212 are both arc surfaces. Figure 2 Thus, the arc shape of the first avoidance area 3112 and the second avoidance area 3212 ensures that they do not come into unnecessary contact or friction with the leaf spring 21, thereby avoiding wear and damage caused by excessive constraint on the leaf spring 21. This not only improves the smoothness of the movement of the leaf spring 21, but also reduces noise and vibration, thereby improving the overall performance of the leaf spring energy storage type electric drive axle lifting system.

[0061] In some embodiments, the leaf spring assembly 2 includes two connecting members 22, which are respectively arranged at the two ends of the leaf spring 21, and the leaf spring 21 is rotatably connected to the longitudinal beam 11 through the connecting members 22.

[0062] For example, as shown in FIG. 2, the connecting member 22 is a pin, and the leaf spring 21 is rotatably connected to the longitudinal beam 11 through the pin. Figure 2As shown, the leaf spring 21 can be rotatably connected with the longitudinal beam 11 of the frame 1 through the connecting components 22. Each connecting component 22 is designed with appropriate structure, such as a lug or a hinge point, to ensure that the leaf spring 21 can rotate relative to the longitudinal beam 11 to adapt to different load changes and road conditions. This rotatable connection not only allows the leaf spring 21 to deform flexibly as needed, but also reduces stress concentration and structural damage that may occur due to rigid connection.

[0063] In some embodiments, the connecting component 22 includes a bushing 23 and a hanger plate 24.

[0064] The axial direction of the bushing 23 is consistent with the extension direction of the longitudinal beam 11. The bushing 23 includes an outer shell 231 and an inner shell 232, the inner shell 232 is arranged in the outer shell 231 and can rotate relative to the outer shell 231. The bushing 23 includes an upper bushing 221 and a lower bushing 222. The outer shell 231 of the upper bushing 221 is fixedly connected with the longitudinal beam 11, and the outer shell 231 of the lower bushing 222 is fixedly connected with the leaf spring 21.

[0065] One end of the hanger plate 24 is fixedly connected with the inner shell 232 of the upper bushing 221, and the other end of the hanger plate 24 is fixedly connected with the inner shell 232 of the lower bushing 222.

[0066] As shown in Figure 2 and Figure 3 The axial direction of the bushing 23 is consistent with the front-rear direction, and the upper bushing 221 and the longitudinal beam 11 are fixed together by welding, clamping or bolt connection. For example, the upper bushing 221 includes a fixed seat, the outer shell 231 is welded or clamped on the fixed seat, and the fixed seat is connected with the longitudinal beam 11 by bolts.

[0067] The lower bushing 222 is arranged below the upper bushing 221 and is spaced apart from the upper bushing 221. The outer shell 231 of the lower bushing 222 is fixedly connected with the leaf spring 21, and the inner shell 232 of the upper bushing 221 and the inner shell 232 of the lower bushing 222 are fixedly connected through the hanger plate 24.

[0068] Therefore, when the leaf spring 21 moves slightly, the outer shell 231 of the lower bushing 222 moves with the leaf spring 21, and since the inner shell 232 of the lower bushing 222 can rotate relative to the outer shell 231, the inner shell 232 of the lower bushing 222 does not move, and the hanger plate 24 and the upper bushing 221 also do not move.

[0069] When the leaf spring 21 moves greatly, the outer shell 231 of the lower bushing 222 moves with the leaf spring 21, and the inner shell 232 of the lower bushing 222 can rotate relative to the outer shell 231, but the inner shell 232 of the lower bushing 222 is also affected to some extent due to the large movement of the leaf spring 21, and thus moves, at this time, the hanging plate 24 moves with the inner shell 232 of the lower bushing 222, and then drives the inner shell 232 of the upper bushing 221 to rotate relative to the outer shell 231 of the upper bushing 221, thereby offsetting the movement transmitted through the hanging plate 24.

[0070] In some embodiments, the two ends of the leaf spring 21 are each provided with an annular portion 211, and the annular portion 211 is fixedly connected with the outer shell 231 of the lower bushing 222.

[0071] For example, as shown in Figure 2 the two ends of the leaf spring 21 are each provided with an annular portion 211, and the annular portion 211 is fixedly connected with the outer shell 231 of the lower bushing 222, and the annular portion 211 is used to facilitate the installation of the lower bushing 222.

[0072] In other embodiments, a rubber layer 233 is arranged between the inner shell 232 and the outer shell 231, and the inner shell 232 and the outer shell 231 are fixedly connected with the rubber layer 233.

[0073] For example, as shown in Figure 3 In order to further improve the shock absorption performance and durability of the connecting component 22, a rubber layer 233 is arranged between the inner shell 232 and the outer shell 231, and the inner shell 232 and the outer shell 231 are fixedly connected with the rubber layer 233. The presence of the rubber layer 233 not only provides good shock absorption effect, but also has a certain elasticity and can be twisted and deformed, so that the inner shell 232 can rotate relative to the outer shell 231, and after deformation, it can also restore to the original shape, so that the inner shell 232 can be reset.

[0074] In some embodiments, the leaf spring energy storage type electric drive axle lifting system comprises a linkage assembly 5, and the linkage assembly 5 and the electric drive axle 4 are arranged on the two sides of the clamping assembly 3.

[0075] The linkage assembly 5 comprises a first rod 51 and a second rod 52, one end of the first rod 51 and one end of the second rod 52 are rotatably connected with the two longitudinal beams 11 respectively, and the other end of the first rod 51 and the other end of the second rod 52 are rotatably connected with the first clamping piece 31.

[0076] For example, as shown in Figure 1As shown, the first rod 51 and the second rod 52 form a V shape, the rear end of the first rod 51 is hingedly connected to the longitudinal beam 11, the rear end of the second rod 52 is hingedly connected to the longitudinal beam 11, and the front end of the first rod 51 and the front end of the second rod 52 are hingedly connected to the first clamping piece 31. In this way, the connecting rod assembly 5 can provide a certain supporting force for the first clamping piece 31, thereby providing a certain supporting force for the leaf spring 21, and further assisting the movement of the electric drive axle 4.

[0077] Alternatively, the front end of the first rod 51 and the front end of the second rod 52 are fixedly connected, and the first rod 51 and the second rod 52 are integrally formed.

[0078] In some embodiments, the leaf spring energy storage type electric drive axle lifting system comprises a connecting shaft 6, one end of the connecting shaft 6 is fixedly connected to the first clamping piece 31, and the first rod 51 and the second rod 52 are hingedly connected to the connecting shaft 6.

[0079] For example, as shown in the figure, Figure 2 The connecting shaft 6 extends in the up-down direction, the bottom of the connecting shaft 6 is fixedly connected to the first clamping piece 31, and the top of the connecting shaft 6 is provided with an end cover, which can prevent the first rod 51 and the second rod 52 from slipping off.

[0080] In some embodiments, the leaf spring energy storage type electric drive axle lifting system comprises a plurality of load-bearing air bags 7, which are connected to the vehicle frame 1, and the plurality of load-bearing air bags 7 are arranged at intervals.

[0081] For example, as shown in the figure, Figure 1 Each longitudinal beam 11 is provided with two air bags arranged at intervals in the front-rear direction, and the electric drive axle 4 is arranged between the two air bags. In this way, when the vehicle is fully loaded, the air bags are inflated to increase the supporting force; while when the vehicle is empty, the air bags are deflated. The design of multiple air bags allows each air bag to be adjusted independently, thereby better adapting to different load distributions and road conditions, and ensuring that the vehicle can maintain stable driving performance under various working conditions.

[0082] Alternatively, a limiting block 111 is arranged on the outer side of the longitudinal beam 11 to limit the movement of the electric drive axle 4.

[0083] As shown in the figure, Figures 5 to 7 The leaf spring energy storage type electric drive axle lifting system has three working states. The first state is the initial assembly state, at this time the leaf spring 21 is in a zero-load free state, and the electric drive axle 4 has a certain gap with the limiting block 111, which ensures that the leaf spring 21 can be smoothly assembled.

[0084] The second state is the electric drive axle 4 lifting state, when the vehicle is empty, the load-bearing air bags 7 are not inflated, and the gravity of the electric drive axle 4 deforms the leaf spring 21 in a free state until the elastic force of the leaf spring 21 balances with the gravity of the electric drive axle 4, at this time the leaf spring 21 is approximately in a flat state.

[0085] The third state is the full load driving state, the electric drive axle 4 is not allowed to lift when the vehicle is full load, at this time the air suspension control system (EC leaf spring energy storage type electric drive axle lifting system S) inflates the load bearing air bag 7, the generated air bag pressure acts on the electric drive axle 4, forces the leaf spring 21 to reverse the arch, makes the electric drive axle 4 contact with the ground, with the increase of the air supply pressure, the force generated by the load bearing air bag 7 is mostly used to bear in addition to offsetting the reverse arch elastic force of the leaf spring 21. When the load bearing air bag 7 is deflated, the elastic potential energy stored by the reverse arch deformation of the leaf spring 21 lifts the electric drive axle 4, so that the electric drive axle 4 reenters the lifting state.

[0086] The air pressure of the load bearing air bag 7 is used to force the leaf spring 21 to deform when the vehicle is full load, and the air pressure of the load bearing air bag 7 is released when the electric drive axle 4 needs to be lifted when the vehicle is empty. The elastic potential energy of the leaf spring 21 is used to lift the electric drive axle 4. When the vehicle is full load driving, the suspension height (i.e. the distance between the center line of the electric drive axle 4 and the lower wing surface of the vehicle frame 1) is H, the liftable amount is H1, and the suspension height after the electric drive axle 4 is lifted is (H-H1). The deformation amount of the leaf spring 21 to overcome the gravity of the electric drive axle 4 is H2, so in the initial assembly state, there is no effect of the gravity of the electric drive axle 4, at this time the suspension height is (H-H1-H2).

[0087] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A leaf spring energy storage electric drive axle lift system characterized by, The utility model relates to a kind of plate spring energy storage type electric drive axle lifting system, including: Frame, the frame has two longitudinal beams; Leaf spring assembly, two ends of the leaf spring assembly are respectively connected with two longitudinal beams, and the leaf spring assembly includes leaf spring; Clamping assembly and electric drive axle, the leaf spring assembly and the electric drive axle are connected by the clamping assembly, so that the electric drive axle is raised or lowered relative to the frame; The plate spring energy storage type electric drive axle lifting system includes load-bearing air bag, the load-bearing air bag is connected with the frame, and the load-bearing air bag is provided with multiple, multiple load-bearing air bags are arranged at intervals; Vehicle full load uses the air pressure of the load-bearing air bag to force the leaf spring to deform, vehicle empty and the electric drive axle needs to be lifted, the air pressure of the load-bearing air bag is released, and the electric drive axle is lifted using the elastic potential energy of the leaf spring.

2. The plate spring energy storage electric drive axle lift system of claim 1, wherein, The clamping assembly includes first clamping piece and second clamping piece, the first clamping piece is connected with the frame, and the first clamping piece has first clamping surface, and the second clamping piece is connected with the top of the electric drive axle, and the second clamping piece has second clamping surface; The leaf spring is clamped between the first clamping surface and the second clamping surface.

3. The plate spring energy storage electric drive axle lift system of claim 2, wherein, The first clamping surface includes first flat area and first avoiding area, and two first avoiding areas are arranged on the two sides of the first flat area in the extension direction of the leaf spring; The second clamping surface includes second flat area and second avoiding area, and two second avoiding areas are arranged on the two sides of the second flat area in the extension direction of the leaf spring; The first flat area and the second flat area are oppositely arranged and respectively fit two surfaces of the leaf spring, and two first avoiding areas and two second avoiding areas correspond one by one and are arranged at intervals with the surface of the leaf spring.

4. The plate spring energy storage electrically driven axle lift system of claim 3, wherein, The first avoiding area gradually bends away from the surface of the leaf spring in the direction away from the first flat area; The second avoiding area gradually bends away from the surface of the leaf spring in the direction away from the second flat area.

5. The plate spring energy storage electrically driven axle lift system according to any one of claims 2-4, characterized in that, The leaf spring assembly includes two connecting components, two connecting components are respectively arranged at two ends of the leaf spring, and the leaf spring is rotatably connected with the longitudinal beam through the connecting component.

6. The plate spring energy storage electrically driven bridge lifting system according to claim 5, characterized in that, The connecting component includes: Bushing, the axial direction of the bushing is consistent with the extension direction of the longitudinal beam, the bushing includes outer shell and inner shell, the inner shell is arranged in the outer shell and can rotate relative to the outer shell, the bushing includes upper bushing and lower bushing, the outer shell of the upper bushing is fixedly connected with the longitudinal beam, and the outer shell of the lower bushing is fixedly connected with the leaf spring; Hanging plate, one end of the hanging plate is fixedly connected with the inner shell of the upper bushing, and the other end of the hanging plate is fixedly connected with the inner shell of the lower bushing.

7. The plate spring energy storage electrically driven bridge lifting system according to claim 6, characterized in that, Two ends of the leaf spring are provided with annular part, and the annular part is fixedly connected with the outer shell of the lower bushing.

8. The plate spring energy storage electrically driven axle lift system according to any one of claims 2-4, characterized in that, The plate spring energy storage type electric drive axle lifting system includes connecting rod assembly, and the connecting rod assembly is arranged on the two sides of the clamping assembly respectively. The connecting rod assembly comprises a first rod and a second rod, one end of the first rod and one end of the second rod are rotatably connected with two longitudinal beams respectively, and the other end of the first rod and the other end of the second rod are rotatably connected with the first clamping piece.

9. The plate spring energy storage electric drive axle lift system of claim 8, wherein, The plate spring energy storage type electric drive bridge lifting system comprises a connecting shaft, one end of the connecting shaft is fixedly connected with the first clamping piece, and the first rod and the second rod are hingedly connected with the connecting shaft.

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