Lightweight rear suspension system for an electric vehicle

Abstract

The present application relates to electric vehicle technology field, especially to a kind of lightweight rear suspension system of electric vehicle, in view of the existing rear suspension hinge shaft does not have lubricating effect, not only wear and tear greatly reduces service life, serious time will affect damping effect, comfort degree etc., provide a kind of lightweight rear suspension system of electric vehicle, including frame, the frame two sides are respectively equipped with rear suspension, hinge joint of frame and suspension connecting rod is respectively equipped with bolt, bolt is respectively equipped with multiple lubricating boxes, lubricating box is equipped with lubricating oil inside, bolt is respectively equipped with the multi-section screw rod that can rotate inside, lubricating box inside is also respectively equipped with the push plate that cooperates with lubricating oil, the multi-section screw rod can constitute lubricating box opening, push plate moves extrusion lubricating oil to outside when rotating;Rear suspension is also respectively equipped with damping device articulated with frame;Hinge shaft has lubricating effect, reduces wear and tear, prolongs service life, improves driving comfort degree etc.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicles, in particular to a lightweight rear suspension system of an electric vehicle. BACKGROUND

[0002] The suspension system is an important part of connecting the vehicle body and the wheels, mainly to support the vehicle body, absorb road impact, ensure good contact between the wheels and the ground, and improve the stability, comfort and handling of the vehicle. In addition to the above functions, the rear suspension also needs to undertake some additional tasks, especially in electric vehicles, the rear suspension system also needs to consider the requirements of battery weight, power transmission and vehicle body design. The current rear suspension of electric vehicles is usually connected with the frame by a hinge shaft. The traditional hinge shaft does not have lubrication effect, not only the wear is large, which reduces the service life, but also seriously affects the damping effect, comfort and other aspects. Therefore, a lightweight rear suspension system of an electric vehicle is designed to solve the above-mentioned problems. SUMMARY

[0003] The present application provides a lightweight rear suspension system of an electric vehicle, which has lubrication effect, reduces wear, prolongs service life, improves driving comfort, and effectively solves the problems mentioned in the background technology.

[0004] To solve the above problems, the technical scheme adopted by the present application is as follows:

[0005] A lightweight rear suspension system of an electric vehicle, comprising a frame, the frame is provided with a rear suspension on both sides, the rear suspension comprises a plurality of suspension connecting rods, the suspension connecting rods are hingedly connected to the frame on both sides, a latch is arranged at the hinge connection between the frame and the suspension connecting rod, a plurality of lubricating boxes are arranged on the latch, the lubricating boxes are filled with lubricating oil, a plurality of threaded rods capable of rotating are arranged in the latch, and a push plate matched with the lubricating oil is further arranged in the lubricating box, the threaded rods can form a structure that opens the lubricating box and moves the push plate outward to extrude the lubricating oil when the threaded rods rotate; a damping device is further arranged on the rear suspension and hingedly connected to the frame; a plurality of lock discs are arranged on the frame, a plug hole is formed in each lock disc, a plug matched with the plug hole is arranged on the latch, and a plurality of locking pins are further arranged in the latch.

[0006] A plurality of hinge seats are arranged on the frame, the latches are mounted on the inner walls of the corresponding hinge seats, the lock discs are fixedly connected to the corresponding hinge seats, a pin cap is fixedly connected to one side of the end face of each latch, the threaded rods are rotatably connected to the inner walls of the latches, and a first handle is further fixedly connected to the outer surface of each threaded rod.

[0007] The outer surface of the multi-section threaded rod is respectively threaded with a first threaded cylinder, the outer surface of the first threaded cylinder is respectively fixed with two first guide plates, the lock pin is respectively slidably connected to the inner wall of the plug, the inner side of the two lock pins is respectively fixed with a first sliding pin, and the first guide plate is respectively provided with a first inclined key groove matched with the first sliding pin.

[0008] The outer surface of the multi-section threaded rod is respectively threaded with a first threaded cylinder, the outer surface of the first threaded cylinder is respectively fixed with two first guide plates, the lock pin is respectively slidably connected to the inner wall of the plug, the inner side of the two lock pins is respectively fixed with a first sliding pin, and the first guide plate is respectively provided with a first inclined key groove matched with the first sliding pin.

[0009] The outer surface of the threaded sleeve is respectively hinged with four uniformly distributed telescopic push rods, the push plate is respectively slidably connected to the inner wall of the lubricating box, and the outer side of the telescopic push rod is respectively hinged to the corresponding push plate.

[0010] The telescopic push rod respectively comprises a first outer cylinder and a first inner rod, the first inner rod is slidably connected to the inner wall of the first outer cylinder, the first inner rod is respectively fixed with a first outer cylinder sliding connection anti-drop pad on one side of the end face, the first inner rod is respectively sleeved with a first tension spring on the outer surface, one end of the first tension spring is respectively fixed on the anti-drop pad, and the other end of the first tension spring is respectively fixed on the inner wall of the top end of the first outer cylinder.

[0011] The inner wall of the two ends of the first handle is respectively slidably connected with a support seat, the pin cap is respectively fixed with a gear ring, the support seat is respectively provided with a lock tooth matched with the gear ring, and the inner wall of the two ends of the first handle is respectively fixed with a first spring matched with the support seat.

[0012] The two side end faces of the support seat are respectively fixed with an extension seat, the inner wall of the extension seat is respectively slidably connected with a square box, the inner wall of the square box is respectively slidably connected with a guide pin, the bottom end inner wall of the square box is respectively fixed with a small spring matched with the guide pin, and the lower end surface of the first handle is respectively provided with a first horizontal groove, a first inclined groove, a second horizontal groove and a second inclined groove matched with the guide pin.

[0013] The damping device respectively comprises a telescopic rod, the telescopic rod respectively comprises a second outer cylinder and a second inner rod, the second inner rod is slidably connected to the inner wall of the second outer cylinder, the bottom end inner wall of the second inner rod is respectively fixed with an anti-drop seat slidably connected with the second outer cylinder, the top end of the second outer cylinder is respectively fixed with a second connecting plate, the top end of the second inner rod is respectively fixed with a first connecting plate, and a damping spring is respectively arranged between the first connecting plate and the second connecting plate.

[0014] The second inner rod inner wall is respectively provided with an outer shaft capable of rotating, the inner wall of the outer shaft is respectively connected with an inner shaft in a sliding mode, the inner shaft is respectively fixed with a first threaded rod, the second inner rod inner wall is respectively fixed with a threaded seat in threaded connection with the first threaded rod, and the second inner rod inner wall is respectively connected with a U-shaped seat in a sliding mode and in rotational connection with the first threaded rod.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] Through the cooperation of the plug pin and the lock disc, the rotation of the plug pin can be limited when the plug is inserted into the socket. The multi-section threaded rod can drive the two lock pins to move outward when the multi-section threaded rod rotates, which can prevent the plug from being separated from the socket, thereby fixing the plug pin, i.e., fixing the plug pin at a specified position. The lubricating box can add lubricating oil to the contact surface between the plug pin and the suspension connecting rod, thereby reducing friction and wear and improving service life and driving comfort. When the multi-section threaded rod rotates, the lock pin can be driven to move outward to fix the plug pin, and the corresponding lubricating box can be opened and the push plate can be moved outward, so that the lubricating oil can flow to the outside when the lubricating box is opened, and the lubricating oil in the lubricating box can be pushed out when the push plate moves outward, thereby making the lubricating oil flow to the specified position. The lubricating box is in a closed state in a normal state, which can prevent the lubricating oil from flowing out. Since the lubricating oil has a certain consistency, it is easy to flow out under the pushing of the push plate. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a first axis measurement diagram of the lightweight rear suspension system of the electric vehicle.

[0018] Figure 2 It is a second axis measurement diagram of the lightweight rear suspension system of the electric vehicle.

[0019] Figure 3 It is a plug pin installation schematic diagram of the lightweight rear suspension system of the electric vehicle.

[0020] Figure 4 It is a pin cap installation schematic diagram of the lightweight rear suspension system of the electric vehicle.

[0021] Figure 5 It is a plug pin sectional view of the lightweight rear suspension system of the electric vehicle.

[0022] Figure 6A multi-section threaded rod installation schematic diagram of a lightweight rear suspension system of an electric vehicle according to the present application.

[0023] Figure 7 A lubricating box installation schematic diagram of a lightweight rear suspension system of an electric vehicle according to the present application.

[0024] Figure 8 A first outer cylinder sectional view of a lightweight rear suspension system of an electric vehicle according to the present application.

[0025] Figure 9 A first handle sectional view of a lightweight rear suspension system of an electric vehicle according to the present application.

[0026] Figure 10 A square box sectional view of a lightweight rear suspension system of an electric vehicle according to the present application.

[0027] Figure 11 A guide pin installation schematic diagram of a lightweight rear suspension system of an electric vehicle according to the present application.

[0028] Figure 12 A first wedge block installation schematic diagram of a lightweight rear suspension system of an electric vehicle according to the present application.

[0029] Figure 13 A shock absorbing device structure schematic diagram of a lightweight rear suspension system of an electric vehicle according to the present application.

[0030] Figure 14 A second outer cylinder sectional view of a lightweight rear suspension system of an electric vehicle according to the present application.

[0031] Figure 15 A U-shaped seat sectional view of a lightweight rear suspension system of an electric vehicle according to the present application.

[0032] The figure mark: 1-frame, 2-suspension connecting rod, 3-hinge seat, 4-pin cap, 5-first handle, 6-multistage threaded rod, 7-lock disc, 8-socket, 9-plug, 10-first threaded cylinder, 11-first guide plate, 12-first sliding pin, 13-first inclined key groove, 14-lock pin, 15-lubricating box, 16-push plate, 17-U-shaped baffle, 18-leakage hole, 19-extended pipe, 20-threaded sleeve, 21-first outer cylinder, 22-first inner rod, 23-anti-drop pad, 24-first tension spring, 25-tooth ring, 26-support seat, 27-lock tooth, 28-first spring, 29-first guide rod, 30-control handle, 31-extended seat, 32-extended seat, 33-square box, 34-small spring, 35-guide pin, 36-first transverse groove, 37-first inclined groove, 38-second transverse groove, 39-second inclined groove, 40-first wedge-shaped block, 41-second wedge-shaped block, 42-third wedge-shaped block, 43-connection cover, 44-second handle, 45-first connection plate, 46-outer shaft, 47-inner shaft, 48-first threaded rod, 49-threaded seat, 50-U-shaped seat, 51-second sliding pin, 52-second inclined key groove, 53-clip pin, 54-clip slot, 55-anti-drop seat, 56-second inner rod, 57-second outer cylinder, 58-second connection plate, 59-damping spring. DETAILED DESCRIPTION

[0033] The following is a specific embodiment of the present application, and the technical solutions of the present application are further described in conjunction with the drawings, but the present application is not limited to these embodiments.

[0034] As Figures 1-15 shown, the present application provides a lightweight rear suspension system of an electric vehicle, comprising a frame 1, the frame 1 is provided with a rear suspension on both sides, the rear suspension comprises a plurality of suspension connecting rods, the suspension connecting rods are hingedly connected on both sides of the frame 1, the hinge connection between the frame 1 and the suspension connecting rods is respectively provided with a plug 31, the plug 31 is respectively provided with a plurality of lubricating boxes 15, the lubricating boxes 15 are filled with lubricating oil, the plug 31 is respectively provided with a rotatable multistage threaded rod 6, the lubricating boxes 15 are respectively provided with a push plate 16 matched with the lubricating oil, the multistage threaded rod 6 can constitute a structure that the lubricating boxes 15 are opened and the push plate 16 moves outward to extrude the lubricating oil when the multistage threaded rod 6 rotates; the rear suspension is further respectively provided with a damping device hingedly connected with the frame 1; the frame 1 is provided with a plurality of lock discs 7, the lock discs 7 are respectively provided with sockets 8, the plug 31 is respectively provided with plugs 9 matched with the sockets 8, the plug 31 is further provided with a plurality of lock pins 14, the multistage threaded rod 6 can further constitute a structure that the lock pins 14 move outward when the multistage threaded rod 6 rotates.

[0035] As Figures 1-8As shown, the frame 1 is used to support and mount the entire electric vehicle. The frame 1 is existing technology and will not be described further. The braking system, tires, etc., are mounted on the rear suspension. The braking system, tires, etc., are also existing technology and will not be described further. The rear suspension is hinged to the frame 1 via suspension links, and through the shock absorption device, it provides support and shock absorption for the frame 1. The pin 31 acts as a hinge shaft. Through the cooperation of the pin 31 and the locking disc 7, the pin 31 can be restricted from rotating when the plug 9 is inserted into the socket 8. The multi-segment threaded rod 6, when rotating, drives the two locking pins 14 to move outwards. When the locking pins 14 move outwards, they prevent the plug 9 from dislodging from the socket 8, thus fixing the pin 31 in a designated position. The lubrication box 15 adds lubricating oil to the contact surface between the pin 31 and the suspension link, thereby... Reducing friction between the two components lowers wear and extends service life, further improving driving comfort. When the multi-segment threaded rod 6 rotates, it drives the locking pin 14 to move outward, fixing the pin 31. Simultaneously, it drives the corresponding lubrication box 15 to open and the push plate 16 to move outward. When the lubrication box 15 is open, the lubricating oil can flow to the outside. When the push plate 16 moves outward, it pushes the lubricating oil inside the lubrication box 15, allowing the lubricating oil to flow out to a designated position. The lubrication box 15 is normally closed to prevent lubricating oil from flowing out. Due to the certain viscosity of the lubricating oil, it is easy for the lubricating oil to flow out under the push of the push plate 16. The rear suspension can be made of carbon fiber and glass fiber composite materials or aluminum alloy materials. While ensuring high rigidity, it can effectively reduce the weight of the suspension, thereby reducing the overall vehicle weight, reducing the burden on the battery, extending the battery's service life, and thus improving the driving range.

[0036] The frame 1 is provided with multiple hinge seats 3, and the pins 31 are respectively installed on the inner wall of the corresponding hinge seats 3. The locking discs 7 are respectively fixed to the corresponding hinge seats 3. The pin caps 4 are respectively fixed to one end face of the pins 31. The multi-segment threaded rods 6 are respectively rotatably connected to the inner wall of the pins 31. The first handles 5 are also respectively fixed to the outer surface of the multi-segment threaded rods 6.

[0037] like Figures 3-5 As shown, the pin cap 4 prevents the pin 31 from disengaging from the hinge seat 3; as Figure 5 As shown, through the cooperation of the locking disc 7, the socket 8, and the plug 9, the plug 9 is inserted into the inner wall of the socket 8, which can restrict the rotation of the pin 31; the multi-segment threaded rod 6 is rotatably connected to the inner wall at the center of the pin 31, and when the first handle 5 is driven to rotate, it can drive the multi-segment threaded rod 6 to rotate.

[0038] The outer surface of the multi-section threaded rod 6 is threadedly connected with a first threaded cylinder 10 on one side, the outer surface of the first threaded cylinder 10 is fixedly connected with two first guide plates 11 on both sides, the lock pin 14 is slidably connected to the inner wall of the plug 9 at both ends, the inner side of the two lock pins 14 is fixedly connected with a first sliding pin 12, and the first guide plate 11 is provided with a first inclined key groove 13 matched with the first sliding pin 12.

[0039] As shown in Figures 5-6 , the lock pin 14 can slide inward or outward in the inner wall of the plug 9, the inner wall of the plug 9 is provided with a mounting groove, the first threaded cylinder 10 and the first guide plate 11 can only move forward and backward, the outer surface of the multi-section threaded rod 6 is provided with a plurality of threads, which are threadedly connected with the corresponding first threaded cylinder 10 and threaded sleeve 20, when the multi-section threaded rod 6 rotates, it can drive the corresponding first threaded cylinder 10 and first guide plate 11 to move forward or backward, when the first guide plate 11 moves forward, the first inclined key groove 13 and the first sliding pin 12 are engaged, which can drive the lock pin 14 to move outward, when the first threaded cylinder 10 and the first guide plate 11 move backward, the first inclined key groove 13 and the first sliding pin 12 are engaged, which can drive the lock pin 14 to move inward, thereby controlling the sliding pin to move outward or inward, and having a self-locking function under the threaded connection of the multi-section threaded rod 6 and the first threaded cylinder 10, that is, when the multi-section threaded rod 6 does not rotate, the position of the corresponding lock pin 14 is fixed, and when the lock pin 14 is at the outer end, it can prevent the plug 31 and the lock disc 7 from being separated.

[0040] The outer surface of the multi-section threaded rod 6 is threadedly connected with two threaded sleeves 20 in the middle, the lubricating box 15 is fixedly connected to the inner wall of the plug 31, a plurality of leakage holes 18 are formed on both sides of the outer side of the lubricating box 15, and the U-shaped blocking plate 17 matched with the corresponding leakage hole 18 is slidably connected to the inner wall of the lubricating box 15 on both sides, and the U-shaped blocking plate 17 is fixedly connected to the corresponding threaded sleeve 20.

[0041] As shown in Figures 6-7 , the U-shaped blocking plate 17 is slidably connected to the inner wall of the plug 31, the plug 31 and the threaded sleeve 20 can only move forward and backward, and the outer surface of the multi-section threaded rod 6 is provided with two threads with the same pitch and different rotation directions in the middle, which can drive the two threaded sleeves 20 to move inward or outward synchronously when the multi-section threaded rod 6 rotates; when the multi-section threaded rod 6 rotates, it can drive the threaded sleeve 20 to move inward or outward, when the threaded sleeve 20 moves inward, it can also drive the corresponding U-shaped blocking plate 17 to move inward, and when the U-shaped blocking plate 17 meets the leakage hole 18 by moving inward, it can block the leakage hole 18, that is, the corresponding lubricating box 15 is in a closed state, and when the U-shaped blocking plate 17 moves outward, it can move away from the leakage hole 18, that is, the corresponding lubricating box 15 is in an open state.

[0042] Four evenly distributed telescopic push rods are hinged to the outer surface of the threaded sleeve 20. The push plates 16 are slidably connected to the inner wall of the lubrication box 15, and the outer ends of the telescopic push rods are respectively hinged to the corresponding push plates 16.

[0043] like Figure 7 As shown, the push plate 16 can slide on the inner wall of the lubrication box 15. The telescopic push rod is telescopic and has an outward driving force when compressed, that is, it drives the push plate 16 to push the lubricating oil. When the two threaded sleeves 20 move inward, they can drive the inner end of the telescopic push rod to move inward, and the outer end of the telescopic push rod will drive the corresponding push plate 16 to move inward. When the push plate 16 moves inward to the top, the push plate 16 no longer squeezes the lubricating oil. When the two threaded sleeves 20 move outward, they can drive the telescopic push rod to move outward. When the telescopic push rod moves outward, it can squeeze the push plate 16 to move outward. At this time, the push plate 16 can push the lubricating oil out of the drain hole 18.

[0044] The telescopic push rod includes a first outer cylinder 21 and a first inner rod 22. The first inner rod 22 is slidably connected to the inner wall of the first outer cylinder 21. Anti-detachment pads 23 that are slidably connected to the first outer cylinder 21 are fixedly attached to one end face of the first inner rod 22. A first tension spring 24 is sleeved on the outer surface of the first inner rod 22. One end of the first tension spring 24 is fixedly attached to the anti-detachment pad 23, and the other end of the first tension spring 24 is fixedly attached to the inner wall of the top of the first outer cylinder 21.

[0045] like Figure 8 As shown, the first inner rod 22 can slide on the inner wall of the first outer cylinder 21, that is, move inward or outward. The first inner rod 22 is hinged to the push plate 16, and the first outer cylinder 21 is hinged to the threaded sleeve 20. The function of the anti-detachment pad 23 is to prevent the first inner rod 22 from detaching from the first outer cylinder 21. The first tension spring 24 always exerts an outward pulling force on the anti-detachment pad 23, so that the telescopic push rod is in its longest state under normal conditions. When the two threaded sleeves 20 move outward, the telescopic push rod can drive the push plate 16 to move outward and squeeze the lubricating oil. When the cavity in the suspension link 2 is filled with lubricating oil, the lubricating oil no longer flows out. When the two threaded sleeves 20 continue to move outward... When moving, the telescopic push rod is compressed and shortened, that is, the first tension spring 24 extends. At this time, the telescopic push rod has an outward driving force on the push plate 16, that is, the push plate 16 has a pushing force on the lubricating oil. When the lubricating oil in the cavity of the suspension link 2 decreases, the lubricating oil will continue to flow out under the pushing force of the push plate 16, so that the cavity of the suspension link 2 is always full of lubricating oil, achieving a sufficient lubrication effect. The lubrication box 15 is also provided with extension tubes 19, and the other end of the extension tube 19 passes through the pin cap 4. The extension tubes 19 facilitate the periodic replenishment of lubricating oil into the lubrication box 15. The extension tubes 19 are also provided with one-way valves to prevent lubricating oil from flowing out of the extension tubes 19.

[0046] The inner walls of both ends of the first handle 5 are slidably connected to support seats 26, and the pin cap 4 is fixedly connected to a toothed ring 25. The support seats 26 are respectively provided with locking teeth 27 that cooperate with the toothed ring 25. The inner walls of both ends of the first handle 5 are also fixedly connected to a first spring 28 that cooperates with the support seat 26.

[0047] like Figures 9-11 As shown, the support seat 26 can slide inward or outward on the inner wall of the first handle 5. The first spring 28 always exerts an outward driving force on the two support seats 26. When the support seat 26 is at the outermost end, the two locking teeth 27 can engage with the gear ring 25, which restricts the rotation of the first handle 5 and the multi-segment threaded rod 6. With the cooperation of the gear ring 25 and the locking teeth 27, the multi-segment threaded rod 6 can be prevented from rotating accidentally, thereby further fixing the position of the locking pin 14 and the threaded sleeve 20. The outer end faces of the two support seats 26 are respectively fixed with the first guide rod 29, and the outer ends of the first guide rod 29 are respectively fixed with the control handle 30. By driving the two control handles 30, the two first guide rods 29 and the support seat 26 can be driven to move inward. When the support seat 26 and the locking teeth 27 move inward to the designated position, that is, after the locking teeth 27 disengage from the gear ring 25, the first handle 5 and the multi-segment threaded rod 6 can rotate, that is, adjust the position of the locking pin 14 and the threaded sleeve 20.

[0048] An extension seat 32 is fixedly connected to each of the two end faces of the support seat 26. A square box 33 is slidably connected to the inner wall of the extension seat 32. A guide pin 35 is slidably connected to the inner wall of the square box 33. A small spring 34 that cooperates with the guide pin 35 is fixedly connected to the inner wall of the bottom end of the square box 33. A first horizontal groove 36, a first inclined groove 37, a second horizontal groove 38, and a second inclined groove 39 that cooperate with the guide pin 35 are respectively opened on the lower surface of the first handle 5.

[0049] like Figures 10-12 As shown, the square box 33 can slide up and down on the inner wall of the extension seat 32, and the guide pin 35 can slide back and forth on the inner wall of the square box 33. The small spring 34 always exerts a forward driving force on the guide pin 35, even when the guide pin 35 is in the extended state under normal conditions, and even when the guide pin 35 can stably engage with the first transverse groove 36, the first inclined groove 37, the second transverse groove 38, and the second inclined groove 39 under normal conditions. The installation and shape of the first transverse groove 36, the first inclined groove 37, the second transverse groove 38, and the second inclined groove 39 are as follows. Figure 11As shown, the first wedge block 40 is fixedly connected to the middle of the inner wall of the bottom end of the first horizontal groove 36, the second wedge block 41 is fixedly connected to the inner wall of the first inclined groove 37, and the third wedge block 42 is fixedly connected to the inner wall of the second inclined groove 39. The first wedge block 40, the second wedge block 41, and the third wedge block 42 are respectively provided with inclined surfaces and straight surfaces. When the driving control handle 30, the support seat 26, the lock tooth 27, and the like move inward, that is, when the guide pin 35 moves inward in the inner wall of the first horizontal groove 36, the guide pin 35 can meet the inclined surface of the first wedge block 40. A part of the guide pin 35 can enter the inner wall of the square box 33 under the meshing of the inclined surface of the first wedge block 40, and the small spring 34 is compressed. When the guide pin 35 continues to move inward to be out of contact with the first wedge block 40, the guide pin 35 can pop out under the elastic force of the small spring 34, that is, the top end of the guide pin 35 again contacts the inner wall of the bottom end of the first horizontal groove 36. At this time, the lock tooth 27 is completely out of engagement with the gear ring 25. After the control handle 30 is loosened, the guide pin 35 moves outward in the inner wall of the first horizontal groove 36 under the elastic force of the first spring 28. At this time, the straight surface of the first wedge block 40 blocks the guide pin 35, that is, the guide pin 35 is blocked from moving outward to reset. At this time, the lock tooth 27 can be completely out of engagement with the gear ring 25 and be in a stable state. At this time, the first handle 5 can be driven to operate. When the lock tooth 27 needs to move outward to be engaged with the gear ring 25 again, the two control handles 30 are continuously driven to move inward, that is, the guide pin 35 continues to move inward to enter the inner wall of the first inclined groove 37. The guide pin 35 can enter the inner wall of the second horizontal groove 38 from the first inclined groove 37 under the action of the inclined surface and the straight surface of the second wedge block 41. At this time, the control handle 30 is loosened, and the support seat 26, the lock tooth 27, the guide pin 35, and the like can move outward under the elastic force of the first spring 28. When the guide pin 35 moves outward in the inner wall of the second horizontal groove 38, the guide pin 35 can be prevented from entering the inner wall of the first inclined groove 37 under the action of the straight surface of the second wedge block 41, that is, the guide pin 35 can only move along the inner wall of the second horizontal groove 38. When the guide pin 35 continues to move outward to enter the inner wall of the second inclined groove 39, the guide pin 35 can enter the inner wall of the first horizontal groove 36 from the inner wall of the second inclined groove 39 under the action of the third wedge block 42, and the guide pin 35 can be prevented from entering the inner wall of the first horizontal groove 36 from the inner wall of the second inclined groove 39 under the action of the straight surface of the third wedge block 42. The first wedge block 40, the second wedge block 41, and the third wedge block 42 can make the guide pin 35 move along the specified path, that is, sequentially move along the first horizontal groove 36, the first inclined groove 37, the second horizontal groove 38, and the second inclined groove 39. When the guide pin 35 moves outward to the top end, that is, enters the inner wall of the first horizontal groove 36, the lock tooth 27 can be engaged with the gear ring 25 again, so as to fix the first handle 5 again.

[0050] The damping device respectively comprises a telescopic rod, the telescopic rod respectively comprises a second outer cylinder 57 and a second inner rod 56, the second inner rod 56 is respectively slidably connected to the inner wall of the second outer cylinder 57, the inner wall of the bottom end of the second inner rod 56 is respectively fixedly connected with the anti-disengagement seat 55 slidably connected with the second outer cylinder 57, the top end of the second outer cylinder 57 is respectively fixedly connected with the second connecting plate 58, the top end of the second inner rod 56 is respectively fixedly connected with the first connecting plate 45, and one damping spring 59 is respectively arranged between the first connecting plate 45 and the second connecting plate 58.

[0051] As shown in the drawings, Figure 2 Or Figures 13-14 The anti-disengagement seat 55 and the second inner rod 56 can slide up and down on the inner wall of the second outer cylinder 57, the anti-disengagement pad 23 can prevent the second inner rod 56 from disengaging from the second outer cylinder 57, the first connecting plate 45 is respectively hinged to the rear suspension, the first connecting plate 45 is respectively hinged to the vehicle frame 1, when encountering a bumpy road oscillation, the length of the telescopic rod and the damping spring 59 can change, and the damping effect is achieved through the buffering of the damping spring 59.

[0052] The inner wall of the second inner rod 56 is respectively provided with an outer shaft 46 capable of rotating, the inner wall of the outer shaft 46 is respectively slidably connected with an inner shaft 47, the first threaded rod 48 is respectively fixed on the inner shaft 47, the second inner rod 56 is respectively fixedly connected with a threaded seat 49 threadedly connected with the first threaded rod 48, the second inner rod 56 is respectively slidably connected with a U-shaped seat 50 rotationally connected with the first threaded rod 48, the inner wall of the second inner rod 56 is respectively slidably connected with a locking pin 53, the inner side end of the two locking pins 53 is respectively fixedly connected with a second sliding pin 51, the U-shaped seat 50 is respectively provided with a second inclined key groove 52 matched with the second sliding pin 51, and the inner wall of the second outer cylinder 57 is respectively provided with a plurality of clamping grooves 54 matched with the locking pin 53.

[0053] As shown in the drawings, Figures 14-15As shown, through the cooperation of the set card pin 53 and the card slot 54, the length of the telescopic rod can be locked, that is, it can adapt to the disassembly of various scenes, that is, after the length of the telescopic rod is fixed, the shock absorbing spring 59 no longer works at this time, so that the telescopic rod is in a stable length, facilitating installation and disassembly; the outer shaft 46 is rotatably connected to the inner wall of the second outer cylinder 57, and the second handle 44 is fixedly connected to one side end face of the outer shaft 46; the second handle 44 is rotatably connected to the lower end of the connecting cover 43, and the connecting cover 43 is hinged to the rear suspension; it is equivalent to that the second inner rod 56 is hinged to the rear suspension; through the setting of the second handle 44, the outer shaft 46 is conveniently driven to rotate; the inner shaft 47 and the outer shaft 46 are spline-connected, and when the outer shaft 46 rotates, the inner shaft 47 can be driven to rotate, and the inner shaft 47 can slide up and down on the inner wall of the outer shaft 46; through the setting of the first threaded rod 48, the threaded seat 49 and the U-shaped seat 50, when the inner shaft 47 rotates, the first threaded rod 48 can be driven to rotate, and when the first threaded rod 48 rotates, the first threaded rod 48, the inner shaft 47 and the U-shaped seat 50 can move upward or downward through the threaded connection with the threaded seat 49; the two card pins 53 can move inward or outward on the inner wall of the second inner rod 56; when the U-shaped seat 50 moves upward or downward, the two card pins 53 can be driven to move inward or outward through the engagement of the second sliding pin 51 and the second inclined key groove 52; when the card pin 53 moves outward, it can be engaged with the card slot 54, so as to lock the length of the telescopic rod; when the card pin 53 moves inward, it can be disengaged from the card slot 54, and at this time the telescopic rod can be telescoped up and down, that is, the shock absorbing device can work normally.

[0054] In use, the plug 9 is inserted into the socket 8, the plug 31 is limited to rotate through the cooperation of the plug 31 and the lock disc 7, the two locking pins 14 are driven to move outward through the rotation of the multi-section threaded rod 6, and the plug 9 is prevented from being separated from the socket 8 when the locking pins 14 move outward, so as to fix the plug 31, that is, the plug 31 is fixed at a specified position; the lubricating box 15 can add lubricating oil to the contact surface between the plug 31 and the suspension connecting rod, so as to reduce the friction and wear between them, prolong the service life, and further improve the driving comfort; when the multi-section threaded rod 6 rotates, the plug 31 is fixed by driving the locking pins 14 to move outward, and the corresponding lubricating box 15 is opened and the push plate 16 moves outward, so that the lubricating oil flows out to a specified position when the lubricating box 15 is opened, and the lubricating oil is pushed out of the lubricating box 15 when the push plate 16 moves outward; the lubricating box 15 is in a closed state in a normal state, which can prevent the lubricating oil from flowing out.

Claims

1. A lightweight rear suspension system of an electric vehicle comprising a vehicle frame (1), characterized in that: The frame (1) is provided with rear suspensions on both sides, each of which comprises a plurality of suspension connecting rods hingedly connected to the frame (1), and each of the hinged portions of the frame (1) and the suspension connecting rods is provided with a latch (31), and a plurality of lubricating boxes (15) are arranged on the latch (31), and the lubricating boxes (15) are filled with lubricating oil, and a plurality of rotatable multi-section threaded rods (6) are arranged in the latches (31), and the lubricating boxes (15) are further provided with push plates (16) matched with the lubricating oil, and the multi-section threaded rods (6) can form a structure of opening the lubricating boxes (15) and moving the push plates (16) outward to extrude the lubricating oil when the multi-section threaded rods (6) are rotated; and each of the rear suspensions is further provided with a damping device hingedly connected to the frame (1); and a plurality of lock discs (7) are arranged on the frame (1), and each of the lock discs (7) is provided with a jack (8), and each of the latches (31) is provided with a plug (9) matched with the jack (8), and a plurality of lock pins (14) are further arranged in the latches (31), and the multi-section threaded rods (6) can further form a structure of moving the lock pins (14) outward when the multi-section threaded rods (6) are rotated; and first handles (5) are further fixedly connected to the outer surfaces of the multi-section threaded rods (6). The first handles (5) are slidably connected with support seats (26) on the inner walls of both ends thereof, and the latches (31) are further fixedly connected with gear rings (25) on the pin caps (4), and the support seats (26) are further provided with lock teeth (27) matched with the gear rings (25), and the first handles (5) are further fixedly connected with first springs (28) matched with the support seats (26) on the inner walls of both ends thereof. The support seats (26) are further fixedly connected with extension seats (32) on both side end faces thereof, and the extension seats (32) are slidably connected with square boxes (33) on the inner walls thereof, and the square boxes (33) are slidably connected with guide pins (35) on the inner walls thereof, and the inner walls of the bottom ends of the square boxes (33) are further fixedly connected with small springs (34) matched with the guide pins (35), and the lower end surfaces of the first handles (5) are further provided with a first horizontal groove (36), a first inclined groove (37), a second horizontal groove (38) and a second inclined groove (39) matched with the guide pins (35), and the middle portions of the inner walls of the bottom ends of the first horizontal grooves (36) are further fixedly connected with first wedge-shaped blocks (40), and the inner walls of the first inclined grooves (37) are further fixedly connected with second wedge-shaped blocks (41), and the inner walls of the second inclined grooves (39) are further fixedly connected with third wedge-shaped blocks (42), and the first wedge-shaped blocks (40), the second wedge-shaped blocks (41) and the third wedge-shaped blocks (42) can make the guide pins (35) move along the specified path.

2. The lightweight rear suspension system of an electric vehicle as claimed in claim 1, wherein: The frame (1) is further provided with a plurality of hinged seats (3), and the latches (31) are arranged in the inner walls of the corresponding hinged seats (3), and the lock discs (7) are fixedly connected to the corresponding hinged seats (3), and the latches (31) are further fixedly connected with pin caps (4) on one side end face thereof, and the multi-section threaded rods (6) are rotatably connected to the inner walls of the latches (31).

3. The lightweight rear suspension system of an electric vehicle as claimed in claim 1, wherein: The outer surface of the multi-section threaded rod (6) is respectively threaded with a first threaded cylinder (10), the outer surface of the first threaded cylinder (10) is respectively fixed with two first guide plates (11), the lock pin (14) is respectively connected to the inner wall of the plug (9), the inner side of the two lock pins (14) is respectively fixed with a first sliding pin (12), and the first guide plate (11) is respectively provided with a first inclined key groove (13) matched with the first sliding pin (12).

4. The lightweight rear suspension system of an electric vehicle of claim 1, wherein: The outer surface of the multi-section threaded rod (6) is respectively threaded with two threaded sleeves (20), the lubricating box (15) is respectively fixed to the inner wall of the plug (31), the outer side of the lubricating box (15) is respectively provided with a plurality of leakage holes (18), the inner wall of the lubricating box (15) is respectively connected with a U-shaped blocking plate (17) matched with the corresponding leakage hole (18), and the U-shaped blocking plate (17) is respectively fixed to the corresponding threaded sleeve (20).

5. The lightweight rear suspension system of an electric vehicle as claimed in claim 4, wherein: The outer surface of the threaded sleeve (20) is respectively hinged with four evenly distributed telescopic push rods, the push plate (16) is respectively connected to the inner wall of the lubricating box (15), and the outer side of the telescopic push rod is respectively hinged to the corresponding push plate (16).

6. The lightweight rear suspension system of an electric vehicle as claimed in claim 5, wherein: The telescopic push rod respectively comprises a first outer cylinder (21) and a first inner rod (22), the first inner rod (22) is respectively connected to the inner wall of the first outer cylinder (21), the first inner rod (22) is respectively fixed with a anti-loose pad (23) matched with the first outer cylinder (21) on one side of the end face, the first inner rod (22) is respectively sleeved with a first tension spring (24) on the outer surface, one end of the first tension spring (24) is respectively fixed to the anti-loose pad (23), and the other end of the first tension spring (24) is respectively fixed to the inner wall of the top end of the first outer cylinder (21).

7. The lightweight rear suspension system of an electric vehicle as claimed in claim 1, wherein: The shock-absorbing device respectively comprises a telescopic rod, the telescopic rod respectively comprises a second outer cylinder (57) and a second inner rod (56), the second inner rod (56) is respectively connected to the inner wall of the second outer cylinder (57), the bottom end of the second inner rod (56) is respectively fixed with an anti-loose seat (55) matched with the second outer cylinder (57), the top end of the second outer cylinder (57) is respectively fixed with a second connecting plate (58), the top end of the second inner rod (56) is respectively fixed with a first connecting plate (45), and a shock-absorbing spring (59) is respectively arranged between the first connecting plate (45) and the second connecting plate (58).

8. The lightweight rear suspension system of an electric vehicle as claimed in claim 7, wherein: The inner wall of the second inner rod (56) is respectively provided with an outer shaft (46) capable of rotating, the inner wall of the outer shaft (46) is respectively and slidably connected with an inner shaft (47), the inner shaft (47) is respectively and fixedly provided with a first threaded rod (48), the inner wall of the second inner rod (56) is respectively and fixedly connected with a threaded seat (49) threadedly connected with the first threaded rod (48), the inner wall of the second inner rod (56) is also respectively and slidably connected with a U-shaped seat (50) rotationally connected with the first threaded rod (48), the inner wall of the second inner rod (56) is respectively and slidably connected with a pin (53), the inner side end of the two pins (53) is respectively and fixedly provided with a second sliding pin (51), the U-shaped seat (50) is respectively and provided with a second inclined key groove (52) matched with the second sliding pin (51), and the inner wall of the second outer cylinder (57) is respectively and provided with a plurality of clamping grooves (54) matched with the pin (53).

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