Suspended rear axle mechanism for electric vehicle

Abstract

The present invention relates to the technical field of suspended rear axle mechanisms, and in particular to a suspended rear axle mechanism for an electric vehicle, comprising a rear axle reducer, a bridge housing fixedly mounted on both sides of the rear axle reducer, a brake drum fixedly mounted on the outside of each bridge housing, a wheel hub fixedly mounted on the outside of each brake drum, a suspended half-axle mechanism provided between the wheel hub and the brake drum, guide arms fixedly mounted on the upper sides of the inner walls of the two brake drums, a shock-absorbing bracket fixedly mounted on the upper ends of the guide arms, a shock-absorbing mechanism provided on the upper ends of the shock-absorbing brackets, a buffer frame provided on the upper ends of the rear axle reducer located at the upper ends of the bridge housings, and a suspension frame mechanism provided on the upper ends of the buffer frames. The present invention adopts a suspended half-axle that is easy to disassemble and maintain. Compared with traditional half-axles, it does not need to withstand the impact force from the tires, and the bridge housing is responsible for bearing all bending forces. The vehicle is damped by the cooperation of the buffer mechanism and the shock absorber mechanism, which facilitates the vehicle to unload force in multiple directions during driving, thereby achieving smoother driving.

Description

Technical Field

[0001] The present invention relates to the technical field of suspended rear axle mechanisms, and in particular to a suspended rear axle mechanism for an electric vehicle. Background Art

[0002] A suspended rear axle is a special axle structure, typically one that can float up and down. Compared to a standard rear axle, it features a lifting mechanism. When the vehicle is heavily loaded, the lifting mechanism lowers the suspended rear axle, allowing it to contact the ground and bear the weight. When the vehicle is unloaded or lightly loaded, the suspended rear axle is lifted off the ground, reducing fuel consumption and improving vehicle maneuverability.

[0003] Ordinary rear axles use steel plates for shock absorption, and their shock absorption performance is relatively weak. Due to the high rigidity of the steel plates, it is difficult to quickly and effectively buffer the ups and downs of the road when driving on bumpy roads. Since multiple leaf springs are connected by bolts, the overall weight is large, which increases the vehicle's own weight, thereby affecting the vehicle's fuel economy and power performance.

[0004] In existing technologies, due to the structural characteristics of suspended rear axles, components such as the axle housing and axle shafts may be subjected to excessive pressure when transporting heavy loads, causing deformation or damage. Furthermore, at high speeds, the suspended rear axle may oscillate or wobble due to the elastic deformation of the suspension system, resulting in reduced vehicle stability. Therefore, a suspended rear axle mechanism for electric vehicles is proposed. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a suspended rear axle mechanism for an electric vehicle.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a suspended rear axle mechanism for an electric vehicle, including a rear axle reducer, with axle housings fixedly installed on both sides of the rear axle reducer, a brake drum fixedly installed on the outside of each axle housing, a wheel hub fixedly installed on the outside of each brake drum, a tire fixedly installed on the outside of the wheel hub, a suspended half-axle mechanism provided between the wheel hub and the brake drum, guide arms fixedly installed on the upper sides of the inner walls of the two brake drums, a shock absorber bracket fixedly installed on the upper ends of the guide arms, a shock absorber mechanism provided on the upper ends of the shock absorber brackets, a leaf spring seat fixedly installed on the upper ends of both sides of the axle housing, a rotating arm fixedly installed on the upper ends of the two leaf spring seats, a buffer frame provided on the upper end of the rear axle reducer, and a suspension frame mechanism provided on the upper end of the buffer frame.

[0007] Preferably, the suspension frame mechanism includes a connecting plate fixedly mounted on the upper end of the buffer frame, two fixed brackets fixedly mounted on the inner surface of the connecting plate, connecting bases fixedly mounted on both sides of the connecting plate and the buffer frame, a turntable fixedly mounted on the upper end of each connecting base, and a limiting rod fixedly mounted on the upper end between the two turntables.

[0008] Preferably, a rotating rod is fixedly installed between each turntable located at the upper end of the buffer frame and one side of the connecting plate, a rotating seat is fixedly installed at both ends of the outer side of each rotating rod, and a buffer mechanism is provided between each rotating seat and the leaf spring seat.

[0009] Preferably, the buffer mechanism includes a rotating arm fixedly mounted on the upper end of the leaf spring seat, an upper support arm is rotatably mounted between every two of the rotating seats, and a buffer drum is rotatably mounted between the upper support arm and the rotating arm.

[0010] Preferably, a lower support arm is fixedly mounted on the lower end of each rotating arm, and the lower support arm is rotatably mounted on the lower end of the connecting base.

[0011] Preferably, the shock absorber mechanism includes a spring tray fixedly mounted on the middle end of the outer surface of the shock absorber bracket, a working cylinder is installed inside the shock absorber bracket, a piston rod is provided at the upper end of the working cylinder, a top plate is fixedly mounted on the upper end of the piston rod, a shock absorber spring is provided on the lower surface of the top plate outside the shock absorber bracket, and the lower end of the shock absorber spring is fixedly mounted on the upper surface of the spring tray.

[0012] Preferably, the suspended half-axle mechanism includes a wheel bearing fixedly mounted on the outside of the bridge housing, a rotating bearing is rotatably mounted on the outside of the wheel bearing, a plurality of mounting screws arranged at equal angles are fixedly mounted on the outer surface of the rotating bearing, a flange ring is inserted on the outside of the rotating bearing, and a shaft cover is provided on the outside of the flange ring.

[0013] Preferably, a shaft ring is fixedly installed on the outside of the shaft cover, the installation screw passes through the shaft ring, and each installation screw is rotatably installed with a fixing nut on the outside of the shaft ring, and the rear surface of the shaft ring is fixedly installed inside the bridge housing with a half shaft.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention adopts a suspended half-axle that is easy to disassemble and maintain. Compared with traditional half-axles, it does not need to bear the impact force from the tire. The bridge housing is responsible for bearing all bending forces, thereby achieving a stronger load-bearing capacity.

[0016] The present invention is provided with a buffer frame at the upper end of the rear axle reducer, and the vehicle is damped by the cooperation of the buffer mechanism and the shock absorber mechanism, so as to facilitate the unloading of force in multiple directions during the driving process of the vehicle, thereby achieving a smoother driving.

[0017] The suspended half-axle mechanism of the present invention can be quickly maintained on the half-axle by disassembling the mounting screw, and both the wheel bearing and the rotary bearing withstand the impact force generated by the wheel running, effectively increasing the service life of the half-axle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a suspended rear axle mechanism for an electric vehicle according to the present invention;

[0019] Figure 2 This is a structural schematic diagram of a suspended rear axle mechanism of an electric vehicle according to the present invention from another perspective;

[0020] Figure 3 This is a partial structural diagram of a suspended rear axle mechanism of an electric vehicle according to the present invention;

[0021] Figure 4 This is a schematic structural diagram of a suspension frame mechanism of a suspended rear axle mechanism of an electric vehicle according to the present invention;

[0022] Figure 5 This is a schematic structural diagram of a buffer mechanism of a suspended rear axle mechanism of an electric vehicle according to the present invention;

[0023] Figure 6 This is a schematic diagram of the axle housing structure of a suspended rear axle mechanism of an electric vehicle according to the present invention;

[0024] Figure 7 This is a cross-sectional view of a suspended half-axle mechanism of a suspended rear axle mechanism of an electric vehicle according to the present invention;

[0025] Figure 8 The present invention is a cross-sectional view of a shock absorber mechanism of a suspended rear axle mechanism of an electric vehicle.

[0026] 1. Axle housing; 2. Tire; 3. Brake drum; 4. Wheel hub; 5. Leaf spring seat; 6. Guide arm; 7. Rear axle reducer; 8. Buffer frame; 101. Connecting plate; 102. Connecting base; 103. Turntable; 104. Limit rod; 105. Turn rod; 106. Turning seat; 107. Turning arm; 108. Buffer drum; 109. Upper support arm; 110. Lower support arm; 111. Fixed bracket; 201. Axle cover; 202. Half shaft; 203. Shaft washer; 204. Mounting screw; 205. Flange ring; 206. Rotating bearing; 207. Fixing nut; 208. Fixing bolt; 209. Wheel bearing; 301. Shock absorber bracket; 302. Spring tray; 303. Working cylinder; 304. Piston rod; 305. Top plate; 306. Shock absorber spring. DETAILED DESCRIPTION

[0027] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0028] like Figures 1-8 The electric vehicle shown in the figure comprises a suspended rear axle mechanism, including a rear axle reducer 7, with axle housings 1 fixedly installed on both sides of the rear axle reducer 7, a brake drum 3 fixedly installed on the outside of each axle housing 1, a wheel hub 4 fixedly installed on the outside of each brake drum 3, a tire 2 fixedly installed on the outside of the wheel hub 4, a suspended half-axle mechanism provided between the wheel hub 4 and the brake drum 3, a guide arm 6 fixedly installed on the upper side of the inner wall of the two brake drums 3, a shock-absorbing bracket 301 fixedly installed on the upper end of the guide arm 6, a shock-absorbing mechanism provided on the upper end of the shock-absorbing bracket 301, a leaf spring seat 5 fixedly installed on the upper end of both sides of the axle housing 1, a rotating arm 107 fixedly installed on the upper end of the two leaf spring seats 5, a buffer frame 8 provided on the upper end of the rear axle reducer 7 located at the upper end of the axle housing 1, and a suspension frame mechanism provided on the upper end of the buffer frame 8.

[0029] like Figure 4 As shown, the suspension frame mechanism includes a connecting plate 101 fixedly mounted on the upper end of the buffer frame 8, two fixed brackets 111 are fixedly mounted on the inner surface of the connecting plate 101, connecting bases 102 are fixedly mounted on both sides of the connecting plate 101 and the buffer frame 8, and a turntable 103 is fixedly mounted on the upper end of each connecting base 102. A limiting rod 104 is fixedly mounted on the upper end between the two turntables 103, and the limiting rod 104 and the fixed bracket 111 fix and limit the rear axle reducer 7, thereby realizing the installation of the rear axle reducer 7.

[0030] A rotating rod 105 is fixedly installed between each upper end of the buffer frame 8 and the turntable 103 on one side of the connecting plate 101. A rotating seat 106 is fixedly installed at both ends of the outer side of each rotating rod 105. A buffer mechanism is provided between each rotating seat 106 and the leaf spring seat 5.

[0031] like Figure 5 As shown, the buffer mechanism includes a rotating arm 107 fixedly mounted on the upper end of the leaf spring seat 5, an upper support arm 109 is rotatably mounted between every two rotating seats 106, and a buffer drum 108 is rotatably mounted between the upper support arm 109 and the rotating arm 107. The buffer drum 108 is used to buffer the impact force between the rotating rod 105 and the rotating arm 107, thereby reducing the impact force generated during the vehicle's driving.

[0032] A lower support arm 110 is fixedly mounted at the lower end of each rotating arm 107 , and the lower support arm 110 is rotatably mounted at the lower end of the connecting base 102 . The lower support arm 110 provides a buffer between the axle housing 1 and the buffer frame 8 , providing additional support force to make the force on the axle housing 1 more uniform.

[0033] like Figure 6 、 Figure 7As shown, the suspended half-axle mechanism includes a wheel bearing 209 fixedly mounted on the outside of the bridge housing 1, a rotating bearing 206 is rotatably mounted on the outside of the wheel bearing 209, a plurality of mounting screws 204 arranged at equal angles are fixedly mounted on the outer surface of the rotating bearing 206, a flange ring 205 is inserted on the outside of the rotating bearing 206, and a shaft cover 201 is provided on the outside of the flange ring 205.

[0034] A shaft ring 203 is fixedly installed on the outside of the shaft cover 201, and a mounting screw 204 passes through the shaft ring 203. Each mounting screw 204 is located on the outside of the shaft ring 203 and is rotatably installed with a fixing nut 207. The rear surface of the shaft ring 203 is located inside the bridge housing 1 and a half shaft 202 is fixedly installed. The half shaft 202 can be maintained by removing the fixing nut 207 on the outside, and does not participate in bearing the impact force but only transmits torque, which greatly increases its working life.

[0035] like Figure 8 As shown, the shock absorber mechanism includes a spring tray 302 fixedly mounted on the middle end of the outer surface of the shock absorber bracket 301, a working cylinder 303 is installed inside the shock absorber bracket 301, a piston rod 304 is provided on the upper end of the working cylinder 303, a top plate 305 is fixedly mounted on the upper end of the piston rod 304, a shock absorber spring 306 is provided on the lower surface of the top plate 305 located on the outside of the shock absorber bracket 301, the lower end of the shock absorber spring 306 is fixedly mounted on the upper surface of the spring tray 302, and the top plate 305 is fixedly mounted on the lower surface of the vehicle to provide impact force buffering at the upper and lower ends of the vehicle.

[0036] Working principle: The rear axle reducer 7 reduces the power output of the engine to provide the vehicle with greater torque, thereby effectively improving the vehicle's power performance.

[0037] A bridge housing 1 is fixedly installed on both sides of the rear axle reducer 7. The bridge housing 1 serves as the basic component for installing the rear axle reducer 7 and the wheel hub 4, and mainly plays the role of supporting and protecting the half-shaft 202. The brake drums 3 on both sides are fixedly installed on the outside of the bridge housing 1 through multiple fixing bolts 208, and a wheel hub 4 is fixedly installed on the outside of each brake drum 3.

[0038] During equipment maintenance, operators can quickly remove and clean the axle shaft 202 by removing the retaining nut 207 fixed to the outside of the mounting screw 204. Because the present invention utilizes a suspended axle shaft, a rotary bearing 206 and a wheel bearing 209 are provided on the outside of the axle housing 1 for support. The impact forces generated by the tire 2 during driving act on the flange ring 205 and the wheel bearing 209. The axle shaft 202 only transmits torque and does not need to withstand impact forces, thus reducing stress and making the axle housing 1 more reliable.

[0039] A guide arm 6 for support is fixedly installed on the inner surface of the brake drum 3. A shock-absorbing bracket 301 is fixedly installed on the upper end of the guide arm 6. The working cylinder 303 cooperates with the shock-absorbing spring 306 to buffer the top plate 305 at the upper end, thereby providing a downward buffering effect for the vehicle.

[0040] A rotating arm 107 is fixedly installed on the upper end of the leaf spring seat 5 at the upper end of the bridge housing 1, and a buffer drum 108 is rotatably installed between the rotating arm 107 and the rotating rod 105. The buffer drum 108 reduces the impact force by shrinking between the rotating rod 105 and the bridge housing 1, and cooperates with the lower support arm 110 to disperse the force generated during the vehicle driving process, thereby providing more stable driving.

[0041] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A suspended rear axle mechanism for an electric vehicle, comprising a rear axle reducer (7), characterized in that: A bridge housing (1) is fixedly mounted on both sides of the rear axle reducer (7), a brake drum (3) is fixedly mounted on the outer side of each bridge housing (1), a wheel hub (4) is fixedly mounted on the outer side of each brake drum (3), a tire (2) is fixedly mounted on the outer side of the wheel hub (4), a suspension half-axle mechanism is provided between the wheel hub (4) and the brake drum (3), a guide arm (6) is fixedly mounted on the upper side of the inner wall of the two brake drums (3), a shock absorber bracket (301) is fixedly mounted on the upper end of the guide arm (6), a shock absorber mechanism is provided on the upper end of the shock absorber bracket (301), a leaf spring seat (5) is fixedly mounted on the upper end of both sides of the bridge housing (1), a rotating arm (107) is fixedly mounted on the upper end of the two leaf spring seats (5), a buffer frame (8) is provided on the upper end of the rear axle reducer (7) located at the upper end of the bridge housing (1), and a suspension frame mechanism is provided on the upper end of the buffer frame (8); The suspension frame mechanism comprises a connecting plate (101) fixedly mounted on the upper end of the buffer frame (8), two fixing brackets (111) fixedly mounted on the inner surface of the connecting plate (101), connecting bases (102) fixedly mounted on both sides of the connecting plate (101) and the buffer frame (8), a turntable (103) fixedly mounted on the upper end of each connecting base (102), and a limiting rod (104) fixedly mounted on the upper end between the two turntables (103); A rotating rod (105) is fixedly installed between each upper end of the buffer frame (8) and the turntable (103) on one side of the connecting plate (101), a rotating seat (106) is fixedly installed at both ends of the outer side of each rotating rod (105), and a buffer mechanism is provided between each rotating seat (106) and the leaf spring seat (5); The buffer mechanism comprises a rotating arm (107) fixedly mounted on the upper end of the leaf spring seat (5), an upper support arm (109) is rotatably mounted between every two rotating seats (106), and a buffer drum (108) is rotatably mounted between the upper support arm (109) and the rotating arm (107); A lower support arm (110) is fixedly mounted on the lower end of each rotating arm (107), and the lower support arm (110) is rotatably mounted on the lower end of the connecting base (102).

2. The electric vehicle suspended rear axle mechanism according to claim 1, characterized in that: The shock absorber mechanism comprises a spring tray (302) fixedly mounted on the middle end of the outer surface of a shock absorber bracket (301); a working cylinder (303) is mounted inside the shock absorber bracket (301); a piston rod (304) is provided at the upper end of the working cylinder (303); a top plate (305) is fixedly mounted on the upper end of the piston rod (304); a shock absorber spring (306) is provided on the lower surface of the top plate (305) outside the shock absorber bracket (301); and the lower end of the shock absorber spring (306) is fixedly mounted on the upper surface of the spring tray (302).

3. The electric vehicle suspended rear axle mechanism according to claim 1, characterized in that: The suspended half-axle mechanism comprises a wheel bearing (209) fixedly mounted on the outside of the bridge housing (1); a rotating bearing (206) is rotatably mounted on the outside of the wheel bearing (209); a plurality of mounting screws (204) arranged at equal angles are fixedly mounted on the outer surface of the rotating bearing (206); a flange ring (205) is inserted on the outside of the rotating bearing (206); and a shaft cover (201) is provided on the outside of the flange ring (205).

4. The electric vehicle suspended rear axle mechanism according to claim 3, characterized in that: A shaft ring (203) is fixedly installed on the outside of the shaft cover (201), the mounting screw (204) passes through the shaft ring (203), and each mounting screw (204) is rotatably mounted on the outside of the shaft ring (203) with a fixing nut (207), and a half shaft (202) is fixedly installed on the rear surface of the shaft ring (203) inside the axle housing (1).

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