Lightweight rear suspension system of electric automobile

Abstract

The invention relates to the technical field of electric automobiles, in particular to a light-weight rear suspension system of an electric automobile, and provides a light-weight rear suspension system of an electric automobile aiming at solving the problems that an articulated shaft of an existing rear suspension does not have a lubricating effect, abrasion is large, the service life is shortened, and the damping effect and the comfort degree are affected when the abrasion is serious. Rear suspensions are arranged on the two sides of the frame respectively, bolts are arranged at the hinged positions of the frame and the suspension connecting rods respectively, a plurality of grease boxes are arranged on the bolts respectively, lubricating oil is contained in the grease boxes, a plurality of sections of threaded rods capable of rotating are arranged in the bolts respectively, and push plates matched with the lubricating oil are further arranged in the grease boxes respectively. When the multiple sections of threaded rods rotate, a structure that the grease box is opened and the push plate moves outwards to extrude lubricating oil can be formed; the rear suspension is further provided with damping devices hinged to the frame. The hinge shaft has a lubricating effect, abrasion is reduced, the service life is prolonged, and the driving comfort is improved.

Description

Technical Field

[0001] The invention relates to the technical field of electric vehicles, and in particular to a lightweight rear suspension system of an electric vehicle. Background Art

[0002] The suspension system is an important part that connects the car body and wheels. Its main functions are to support the car body, absorb road impact, ensure good contact between the wheels and the ground, and improve the stability, comfort and handling of the car. For the rear suspension, in addition to the aforementioned functions, it also needs to undertake some additional tasks, especially in electric vehicles, the rear suspension system must also take into account the requirements of battery weight, power transmission and body design. At present, the rear suspension of electric vehicles is usually connected to the frame by an articulated shaft. The traditional articulated shaft does not have a lubricating effect, which not only reduces the service life due to large wear, but also affects the shock absorption effect and comfort in severe cases. For this reason, a lightweight rear suspension system for electric vehicles is designed to solve the above-mentioned problems. Summary of the invention

[0003] The present invention aims at the fact that the existing rear suspension articulated shaft has no lubricating effect, which not only causes great wear and reduces the service life, but also affects the shock absorption effect and comfort in severe cases. The present invention provides a lightweight rear suspension system for an electric vehicle, in which the articulated shaft has a lubricating effect, reduces wear, prolongs the service life, improves driving comfort, etc., and effectively solves the problems mentioned in the above background technology.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is: A lightweight rear suspension system for an electric vehicle comprises a frame, wherein rear suspensions are respectively arranged on both sides of the frame, and the rear suspensions respectively comprise a plurality of suspension links, which are respectively hinged on both sides of the frame, and latches are respectively arranged at the hinges between the frame and the suspension links, and a plurality of grease boxes are respectively arranged on the latches, and the grease boxes are filled with lubricating oil, and a plurality of rotatable threaded rods are respectively arranged inside the latches, and push plates matching with the lubricating oil are also respectively arranged inside the grease boxes, and when the plurality of threaded rods are rotated, a structure in which the grease boxes are opened and the push plates are moved outward to squeeze the lubricating oil is formed; shock absorbing devices hinged to the frame are also respectively arranged on the rear suspension; a plurality of lock disks are respectively arranged on the frame, and sockets are respectively opened on the lock disks, and plugs matching with the sockets are respectively opened on the latches, and a plurality of lock pins are also arranged inside the latches, and when the plurality of threaded rods are rotated, a structure in which the lock pins are moved outward is formed.

[0005] The frame is provided with a plurality of hinged seats, the latches are respectively installed on the corresponding inner walls of the hinged seats, the locking plates are respectively fixed to the corresponding hinged seats, the end faces of one side of the latches are respectively fixed with pin caps, the multi-section threaded rods are respectively rotatably connected to the inner walls of the latches, and the outer surfaces of the multi-section threaded rods are also respectively fixed with first handles.

[0006] One side of the outer surface of the multi-section threaded rod is threadedly connected with a first threaded barrel, and two first guide plates are fixedly connected to the outer surface of the first threaded barrel on both sides. The locking pins are slidably connected to the inner walls at both ends of the plug, and the inner ends of the two locking pins are fixedly connected with first sliding pins, and the first guide plates are respectively provided with first oblique key grooves that match the first sliding pins.

[0007] The middle part of the outer surface of the multi-section threaded rod is threadedly connected to two threaded sleeves, the lubrication boxes are fixedly connected to the inner walls of the pins, and multiple leakage holes are opened on both sides of the outer end surface of the lubrication box. The inner walls on both sides of the lubrication box are slidably connected with U-shaped plugging plates matching the corresponding leakage holes, and the U-shaped plugging plates are fixedly connected to the corresponding threaded sleeves.

[0008] Four evenly distributed telescopic push rods are respectively hinged on the outer surface of the threaded sleeve, the push plates are respectively slidably connected to the inner wall of the grease box, and the outer ends of the telescopic push rods are respectively hinged on the corresponding push plates.

[0009] The telescopic push rods respectively include a first outer tube and a first inner rod, the first inner rods are respectively slidably connected to the inner wall of the first outer tube, one side end surface of the first inner rod is respectively fixed with an anti-drop pad slidably connected to the first outer tube, the outer surface of the first inner rod is respectively sleeved with a first tension spring, one end of the first tension spring is respectively fixed to the anti-drop pad, and the other end of the first tension spring is respectively fixed to the inner wall of the top end of the first outer tube.

[0010] The inner walls at both ends of the first handle are slidably connected to support seats, the pin caps are fixedly connected to gear rings, the support seats are provided with locking teeth matching the gear rings, and the inner walls at both ends of the first handle are also fixedly connected to first springs matching the support seats.

[0011] Extension seats are fixedly connected to the end surfaces on both sides of the support seat, and square boxes are slidably connected to the inner walls of the extension seats. Guide pins are slidably connected to the inner walls of the square boxes. Small springs matching with the guide pins are fixedly connected to the inner walls of the bottom ends of the square boxes, and the lower end surface of the first handle is respectively provided with a first transverse groove, a first oblique groove, a second transverse groove and a second oblique groove matching with the guide pins.

[0012] The shock absorbing devices include telescopic rods, which include a second outer tube and a second inner rod. The second inner rods are slidably connected to the inner wall of the second outer tube. The inner walls of the bottom ends of the second inner rods are fixedly connected with anti-drop seats slidably connected to the second outer tube. The top ends of the second outer tubes are fixedly connected with second connecting plates. The top ends of the second inner rods are fixedly connected with first connecting plates. A shock absorbing spring is provided between the first connecting plate and the second connecting plate.

[0013] The inner walls of the second inner rod are respectively provided with a rotatable outer shaft, the inner walls of the outer shaft are respectively slidably connected with the inner shaft, the first threaded rod is fixed on the inner shaft, the inner walls of the second inner rod are respectively fixed with threaded seats threadedly connected to the first threaded rod, the inner walls of the second inner rod are also respectively slidably connected with U-shaped seats rotatably connected to the first threaded rod, the inner walls on both sides of the second inner rod are respectively slidably connected with bayonet pins, the inner ends of the two bayonet pins are respectively fixed with second sliding pins, the U-shaped seats are respectively provided with second oblique key grooves matching with the second sliding pin, and the inner walls on both sides of the second outer cylinder are respectively provided with a plurality of bayonet grooves matching with the bayonet pins.

[0014] Compared with the prior art, the present invention has the following advantages: By cooperating with the provided latch and the lock plate, the rotation of the latch can be restricted when the plug is inserted into the socket. By means of the provided multi-segment threaded rod, the two lock pins can be driven to move outward when the multi-segment threaded rod rotates. When the lock pin moves outward, the plug can be prevented from being separated from the socket, thereby fixing the latch, that is, fixing the latch at a specified position. The grease box can add lubricating oil to the contact surface between the latch and the suspension link, thereby reducing friction between the two, reducing wear and tear, and increasing service life, and further improving driving comfort. When the multi-segment threaded rod rotates, the lock pin can be driven to move outward to fix the latch, and at the same time, the corresponding grease box can be driven to open and the push plate can be driven to move outward. When the grease box is opened, the lubricating oil can flow to the outside. When the push plate moves outward, the lubricating oil inside the grease box can be pushed, so that the lubricating oil flows out to the specified position. The grease box is in a closed state under normal conditions, which can prevent the lubricating oil from flowing out. Since the lubricating oil has a certain viscosity, the lubricating oil is easy to flow out under the push of the push plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a first axonometric view of a lightweight rear suspension system of an electric vehicle according to the present invention.

[0016] Figure 2 This is a second axonometric view of a lightweight rear suspension system for an electric vehicle according to the present invention.

[0017] Figure 3 The present invention is a schematic diagram of the installation of a latch of a lightweight rear suspension system of an electric vehicle.

[0018] Figure 4 The present invention is a schematic diagram of the pin cap installation of a lightweight rear suspension system of an electric vehicle.

[0019] Figure 5 The present invention is a cross-sectional view of a latch of a lightweight rear suspension system of an electric vehicle.

[0020] Figure 6 The present invention is a schematic diagram of the installation of a multi-section threaded rod of a lightweight rear suspension system of an electric vehicle.

[0021] Figure 7 The present invention is a schematic diagram of the installation of a lubrication box of a lightweight rear suspension system of an electric vehicle.

[0022] Figure 8 The present invention is a cross-sectional view of a first outer cylinder of a lightweight rear suspension system of an electric vehicle.

[0023] Fig. 9 The present invention is a cross-sectional view of a first handle of a lightweight rear suspension system of an electric vehicle.

[0024] Fig.10 The present invention is a square box cross-sectional view of a lightweight rear suspension system of an electric vehicle.

[0025] Fig.11 The present invention is a schematic diagram of the installation of guide pins of a lightweight rear suspension system of an electric vehicle.

[0026] Fig.12 The present invention is a schematic diagram of the installation of a first wedge block of a lightweight rear suspension system of an electric vehicle.

[0027] Fig.13 The present invention is a schematic structural diagram of a shock absorbing device of a lightweight rear suspension system of an electric vehicle.

[0028] Fig.14 The present invention is a cross-sectional view of a second outer cylinder of a lightweight rear suspension system of an electric vehicle.

[0029] Fig.15 The present invention is a cross-sectional view of a U-shaped seat of a lightweight rear suspension system of an electric vehicle.

[0030] Numbers in the figure: 1-frame, 2-suspension link, 3-hinged seat, 4-pin cap, 5-first handle, 6-multi-section threaded rod, 7-locking plate, 8-jack, 9-plug, 10-first threaded cylinder, 11-first guide plate, 12-first sliding pin, 13-first oblique keyway, 14-locking pin, 15-lubrication box, 16-push plate, 17-U-shaped plugging plate, 18-leakage hole, 19-extension tube, 20-threaded sleeve, 21-first outer cylinder, 22-first inner rod, 23-anti-slip pad, 24-first tension spring, 25-gear ring, 26-support seat, 27-locking tooth, 28-first spring, 29-first guide rod, 30-control handle, 31- Latch, 32-extension seat, 33-square box, 34-small spring, 35-guide pin, 36-first transverse groove, 37-first oblique groove, 38-second transverse groove, 39-second oblique groove, 40-first wedge block, 41-second wedge block, 42-third wedge block, 43-connecting cover, 44-second handle, 45-first connecting plate, 46-outer shaft, 47-inner shaft, 48-first threaded rod, 49-threaded seat, 50-U-shaped seat, 51-second sliding pin, 52-second oblique key groove, 53-bayonet, 54-bayonet, 55-anti-slip seat, 56-second inner rod, 57-second outer cylinder, 58-second connecting plate, 59-shock-absorbing spring. DETAILED DESCRIPTION

[0031] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0032] like Figure 1-Figure 15 As shown, the present invention provides a lightweight rear suspension system of an electric vehicle, comprising a frame 1, wherein rear suspensions are respectively arranged on both sides of the frame 1, and the rear suspensions respectively include a plurality of suspension links, which are respectively hinged on both sides of the frame 1, and latches 31 are respectively arranged at the hinges between the frame 1 and the suspension links, and a plurality of grease boxes are respectively arranged on the latches 31, and lubricating oil is filled inside the grease boxes, and a plurality of rotatable threaded rods 6 are respectively arranged inside the latches 31, and push plates 16 matching with the lubricating oil are also respectively arranged inside the grease boxes, and when the plurality of threaded rods 6 are rotated, a structure in which the grease boxes are opened and the push plates 16 move outward to squeeze the lubricating oil can be formed; a shock absorbing device hinged to the frame 1 is also respectively arranged on the rear suspension; a plurality of lock disks 7 are respectively arranged on the frame 1, and plug holes 8 are respectively opened on the lock disks 7, and plugs 9 matching with the plug holes 8 are respectively opened on the latches 31, and a plurality of lock pins 14 are also arranged inside the latches 31, and when the plurality of threaded rods 6 are rotated, a structure in which the lock pins 14 move outward can be formed.

[0033] like Figure 1-Figure 8As shown, the frame 1 is used to support and install the entire electric vehicle. The frame 1 is a prior art and will not be described in detail. The brake device, tires, etc. are installed on the rear suspension. The brake system, tires, etc. are all prior art and will not be described in detail. The rear suspension is hinged to the frame 1 through a suspension link, and then through a shock-absorbing device, the rear suspension can support the frame 1, reduce shock, and buffer. The latch 31 is equivalent to a hinge axis. Through the cooperation of the latch 31 and the lock plate 7, the rotation of the latch 31 can be limited when the plug 9 is inserted into the socket 8. Through the multi-segment threaded rod 6, the two lock pins 14 can be driven to move outward when the multi-segment threaded rod 6 rotates. When the lock pin 14 moves outward, the plug 9 can be prevented from being separated from the socket 8, thereby fixing the latch 31, that is, fixing the latch 31 at a specified position. The grease box can add lubricating oil to the contact surface between the latch 31 and the suspension link. , thereby reducing the friction between the two, reducing wear and tear and increasing service life, and further improving driving comfort; when the multi-segment threaded rod 6 rotates, it can drive the lock pin 14 to move outward to fix the latch 31, and at the same time drive the corresponding grease box to open and the push plate 16 to move outward. When the grease box is opened, the lubricating oil can flow to the outside. When the push plate 16 moves outward, it can push the lubricating oil inside the grease box, so that the lubricating oil flows out to the designated position. The grease box is in a closed state under normal conditions, which can prevent the lubricating oil from flowing out. Since the lubricating oil has a certain viscosity, it is easy for the lubricating oil to flow out under the push of the push plate 16; the rear suspension can be a carbon fiber and glass fiber composite material or an aluminum alloy material, which can effectively reduce the weight of the suspension while ensuring strong hardness, and can reduce the weight of the vehicle, thereby reducing the burden on the battery, extending the battery life, and thus improving the cruising range.

[0034] The frame 1 is provided with a plurality of articulated seats 3, the latches 31 are respectively installed on the inner walls of the corresponding articulated seats 3, the locking plates 7 are respectively fixed to the corresponding articulated seats 3, the end faces of one side of the latches 31 are respectively fixed with pin caps 4, the multi-section threaded rods 6 are respectively rotatably connected to the inner walls of the latches 31, and the outer surfaces of the multi-section threaded rods 6 are also respectively fixed with first handles 5.

[0035] like Figure 3-Figure 5 As shown, the pin cap 4 can prevent the pin 31 from being separated from the hinge seat 3; Figure 5 As shown, through the mutual cooperation of the lock disk 7, the socket 8, and the plug 9, when the plug 9 is inserted into the inner wall of the socket 8, the rotation of the pin 31 can be restricted; the multi-section 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, the multi-section threaded rod 6 can be driven to rotate.

[0036] One side of the outer surface of the multi-section threaded rod 6 is threadedly connected with a first threaded barrel 10, and two first guide plates 11 are fixedly connected to the outer surface of the first threaded barrel 10 on both sides. The locking pins 14 are slidably connected to the inner walls at both ends of the plug 9, and the inner ends of the two locking pins 14 are fixedly connected with first sliding pins 12, and the first guide plates 11 are respectively provided with first oblique key grooves 13 that match the first sliding pins 12.

[0037] like Figure 5-Figure 6 As shown, the locking pin 14 can slide inward or outward on the inner wall of the plug 9, and the inner wall of the plug 9 is respectively provided with a mounting groove, which limits the first threaded cylinder 10 and the first guide plate 11 to move forward and backward. The outer surface of the multi-section threaded rod 6 is respectively provided with multiple sections of threads, which are respectively threadedly connected with the corresponding first threaded cylinder 10 and the threaded sleeve 20. When the multi-section threaded rod 6 rotates, it can drive the corresponding first threaded cylinder 10 and the first guide plate 11 to move forward or backward. When the first guide plate 11 moves forward, the first oblique keyway 13 and the first sliding pin are connected. 12 is engaged, the locking pin 14 can be driven to move outward. When the first threaded cylinder 10 and the first guide plate 11 move backward, the locking pin 14 can be driven to move inward through the engagement of the first oblique keyway 13 and the first sliding pin 12, thereby controlling the sliding pin to move outward or inward, and has a self-locking function under the threaded connection between the multi-segment threaded rod 6 and the first threaded cylinder 10, that is, when the multi-segment threaded rod 6 does not rotate, the corresponding position of the locking pin 14 is fixed, and when the locking pin 14 is at the outer end, it can prevent it from being separated from the latch pin 31 and the lock disk 7.

[0038] Two threaded sleeves 20 are respectively threadedly connected to the middle part of the outer surface of the multi-section threaded rod 6, and the lubrication box 15 is respectively fixed to the inner wall of the pin 31. A plurality of leakage holes 18 are respectively opened on both sides of the outer end surface of the lubrication box 15. The inner walls on both sides of the lubrication box 15 are respectively slidably connected with U-shaped plugging plates 17 matching the corresponding leakage holes 18, and the U-shaped plugging plates 17 are respectively fixed to the corresponding threaded sleeves 20.

[0039] like Figure 6-Figure 7 As shown, the U-shaped plugging plate 17 is slidably connected to the inner wall of the pin 31, and the limit pin 31 and the threaded sleeve 20 can only move forward and backward. Two sections of threads with the same pitch and different rotation directions are provided in the middle of the outer surface of the multi-segment threaded rod 6. When the multi-segment threaded rod 6 rotates, the two threaded sleeves 20 can be driven to move synchronously inward or outward; when the multi-segment threaded rod 6 rotates, the threaded sleeves 20 can be driven to move inward or outward. When the threaded sleeves 20 move inward, the corresponding U-shaped plugging plate 17 can be driven to move inward. When the U-shaped plugging plate 17 moves inward until it meets the leakage hole 18, it can block the leakage hole 18, that is, the corresponding grease box is in a closed state. When the U-shaped plugging plate 17 moves outward, it can stay away from the leakage hole 18, that is, the corresponding grease box is in an open state.

[0040] Four evenly distributed telescopic push rods are hinged on the outer surface of the threaded sleeve 20 , and the push plates 16 are slidably connected to the inner wall of the grease box. The outer ends of the telescopic push rods are hinged on the corresponding push plates 16 .

[0041] like Figure 7 As shown, the push plate 16 can slide on the inner wall of the grease box, the telescopic push rod is retractable, and has an outward driving force when compressed, that is, the push plate 16 is driven to have an outward driving force, so that the push plate 16 pushes the lubricating oil. When the two threaded sleeves 20 move inward, the inner end of the telescopic push rod can be driven 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 end, the push plate 16 no longer squeezes the lubricating oil; when the two threaded sleeves 20 move outward, the telescopic push rod can be driven to move outward, and 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 leak hole 18.

[0042] The telescopic push rods include a first outer tube 21 and a first inner rod 22. The first inner rod 22 is slidably connected to the inner wall of the first outer tube 21. An anti-slip pad 23 slidably connected to the first outer tube 21 is fixedly connected to one end surface 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 connected to the anti-slip pad 23, and the other end of the first tension spring 24 is fixedly connected to the inner wall of the top end of the first outer tube 21.

[0043] 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 on the push plate 16, and the first outer cylinder 21 is hinged on the threaded sleeve 20. The function of the anti-slip pad 23 is to prevent the first inner rod 22 from being separated from the first outer cylinder 21. The first tension spring 24 always has an outward pulling force on the anti-slip pad 23, so that the telescopic push rod is in the 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 to 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 sideways, the telescopic push rod will be squeezed and shortened, that is, the first tension spring 24 is extended. 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 thrust on the lubricating oil. When the lubricating oil in the cavity of the suspension connecting rod 2 is reduced, the lubricating oil will continue to flow out under the thrust of the push plate 16, so that the cavity of the suspension connecting rod 2 is always full of lubricating oil, which has a sufficient lubrication effect; the grease box is also provided with an extension tube 19, and the other end of the extension tube 19 passes through the pin cap 4. Through the set extension tube 19, it is convenient to regularly replenish the lubricating oil into the lubrication box 15. The extension tube 19 is also provided with a one-way valve to prevent the lubricating oil from flowing out of the extension tube 19.

[0044] The inner walls at both ends of the first handle 5 are slidably connected to support seats 26, the pin cap 4 is fixedly connected to gear rings 25, the support seats 26 are provided with locking teeth 27 matching the gear rings 25, and the inner walls at both ends of the first handle 5 are also fixedly connected to first springs 28 matching the support seats 26.

[0045] like Figure 9-11 As shown, the support seat 26 can slide inward or outward on the inner wall of the first handle 5, and the first spring 28 always has 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 mesh with the gear ring 25, that is, the first handle 5 and the multi-section threaded rod 6 can be restricted from rotating at this time. By cooperating with the gear ring 25 and the locking teeth 27, the multi-section threaded rod 6 can be prevented from accidentally rotating, thereby further fixing the position of the locking pin 14 and the threaded sleeve 20; the first guide rods 29 are respectively fixedly connected to the outer end surfaces of the two support seats 26, and the outer ends of the first guide rods 29 are respectively fixedly connected to the control handles 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 are moved inward to the specified position, that is, the locking teeth 27 are disengaged from the gear ring 25, the first handle 5 and the multi-section threaded rod 6 can be rotated at this time, that is, the position of the locking pin 14 and the threaded sleeve 20 is adjusted.

[0046] Extension seats 32 are fixedly connected to the end surfaces on both sides of the support seat 26, and square boxes 33 are slidably connected to the inner walls of the extension seats 32. Guide pins 35 are slidably connected to the inner walls of the square boxes 33. Small springs 34 matching with the guide pins 35 are fixedly connected to the inner walls of the bottom ends of the square boxes 33, and the lower end surfaces of the first handle 5 are respectively provided with a first transverse groove 36, a first oblique groove 37, a second transverse groove 38 and a second oblique groove 39 matching with the guide pins 35.

[0047] like Figure 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 has a forward driving force on the guide pin 35, even if the guide pin 35 is in an extended state under normal conditions, even if the guide pin 35 can be stably engaged 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 shown in FIG. Fig.11As shown, a first wedge-shaped block 40 is fixedly connected to the middle of the inner wall at the bottom end of the first transverse groove 36, a second wedge-shaped block 41 is fixedly connected to the inner wall of the first inclined groove 37, and a third wedge-shaped block 42 is fixedly connected to the inner wall of the second inclined groove 39. The first wedge-shaped block 40, the second wedge-shaped block 41 and the third wedge-shaped block 42 are respectively provided with inclined surfaces and straight surfaces. When the driving control handle 30, the support seat 26, the locking tooth 27, etc. are moved inwardly, that is, when the guide pin 35 moves inwardly on the inner wall of the first transverse groove 36, it can meet the inclined surface of the first wedge-shaped block 40. Under the engagement with the inclined surface of the first wedge-shaped block 40, a part of the guide pin 35 can enter the inner wall of the square box 33 and compress the small spring 34. When the guide pin 35 continues to move inwardly until it is out of contact with the first wedge-shaped block 40, this When the guide pin 35 is pushed outward by the elastic force of the small spring 34, the top of the guide pin 35 contacts the inner wall of the bottom end of the first transverse groove 36 again, and the locking tooth 27 is completely disengaged from the gear ring 25. After the control handle 30 is released, the guide pin 35 moves outward from the inner wall of the first transverse 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, it blocks the guide pin 35 from moving outward and resetting, that is, the locking tooth 27 is completely disengaged from the gear ring 25 and is in a stable state. At this time, the first handle 5 can be driven to operate. When the locking tooth 27 needs to move outward to mesh with the gear ring 25 again, the two control handles 30 are continuously driven to move inward, which makes the guide pin 35 5 continues to move inwardly and enters the inner wall of the first inclined groove 37. When it reaches the inner wall of the first inclined groove 37, it will meet the second wedge-shaped block 41. Similarly, under the action of the inclined surface and the straight surface of the second wedge-shaped block 41, the guide pin 35 can enter the inner wall of the second transverse groove 38 from the first inclined groove 37. At this time, the control handle 30 is released. Under the elastic force of the first spring 28, the support seat 26, the locking tooth 27, the guide pin 35, etc. can move outward. When the guide pin 35 moves outwardly from the inner wall of the second transverse groove 38, under the action of the straight surface of the second wedge-shaped block 41, the guide pin 35 can be prevented from entering the inner wall of the first inclined groove 37. Even if the guide pin 35 can only move along the inner wall of the second transverse groove 38, when the guide pin 35 continues to move outwardly and enters the second inclined groove 38, 9, by providing the third wedge block 42, the guide pin 35 can enter the inner wall of the first transverse groove 36 from the inner wall of the second inclined groove 39, and under the direct action of the third wedge block 42, the guide pin 35 can be prevented from entering the inner wall of the second inclined groove 39 from the inner wall of the first transverse groove 36. By providing the first wedge block 40, the second wedge block 41 and the third wedge block 42, the guide pin 35 can be moved along a specified path, that is, in the order of the first transverse groove 36, the first inclined groove 37, the second transverse 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 transverse groove 36, the locking tooth 27 and the gear ring 25 will mesh again, thereby fixing the first handle 5 again.

[0048] The shock absorbing devices include telescopic rods, which include a second outer tube 57 and a second inner rod 56. The second inner rod 56 is slidably connected to the inner wall of the second outer tube 57. The inner wall of the bottom end of the second inner rod 56 is fixedly connected with an anti-slip seat 55 slidably connected to the second outer tube 57. The top end of the second outer tube 57 is fixedly connected with a second connecting plate 58. The top end of the second inner rod 56 is fixedly connected with a first connecting plate 45. A shock absorbing spring 59 is provided between the first connecting plate 45 and the second connecting plate 58.

[0049] like Figure 2 or Figure 13-Figure 14 As shown, the anti-slip seat 55 and the second inner rod 56 can slide up and down on the inner wall of the second outer tube 57, the anti-slip pad 23 can prevent the second inner rod 56 from being separated from the second outer tube 57, the first connecting plates 45 are respectively hinged on the rear suspension, and the first connecting plates 45 are respectively hinged on the frame 1. When encountering oscillations on bumpy roads, the lengths of the telescopic rod and the shock-absorbing spring 59 can change, and the shock-absorbing effect is achieved through the buffering of the shock-absorbing spring 59.

[0050] The inner walls of the second inner rod 56 are respectively provided with rotatable outer shafts 46, and the inner walls of the outer shafts 46 are respectively slidably connected with inner shafts 47, and the first threaded rods 48 are respectively fixed on the inner shafts 47; the inner walls of the second inner rod 56 are respectively fixed with threaded seats 49 threadedly connected to the first threaded rod 48; the inner walls of the second inner rod 56 are also respectively slidably connected with U-shaped seats 50 rotatably connected to the first threaded rod 48; the inner walls on both sides of the second inner rod 56 are respectively slidably connected with bayonet pins 53, and the inner ends of the two bayonet pins 53 are respectively fixed with second sliding pins 51; the U-shaped seats 50 are respectively provided with second oblique key grooves 52 matching with the second sliding pins 51; the inner walls on both sides of the second outer cylinder 57 are respectively provided with a plurality of bayonet grooves 54 matching with the bayonet pins 53.

[0051] like Figure 14-15As shown, by the cooperation of the provided bayonet 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 scenarios, that is, after the length of the telescopic rod is fixed, the shock-absorbing spring 59 no longer works, so that the telescopic rod is at a stable length, which is convenient for installation and disassembly; the outer shaft 46 is rotatably connected to the inner wall of the second outer cylinder 57, and a second handle 44 is fixedly connected to the end surface of one side of the outer shaft 46, and a connecting cover 43 is rotatably connected to the lower end of the second handle 44, and the connecting cover 43 is hinged on the rear suspension, which is equivalent to the second inner rod 56 being hinged on the rear suspension; the second handle 44 is provided to facilitate the rotation of the outer shaft 46, and the inner shaft 47 and the outer shaft 46 are splined. When the outer shaft 46 rotates, it can drive the inner shaft 47 to rotate, and the inner shaft 47 can slide up and down on the inner wall of the outer shaft 46; A threaded rod 48, a threaded seat 49, and a U-shaped seat 50. When the inner shaft 47 rotates, the first threaded rod 48 can be driven to rotate. When the first threaded rod 48 rotates, the first threaded rod 48, the inner shaft 47, and the U-shaped seat 50 can be moved upward or downward through the threaded connection with the threaded seat 49. The two bayonet pins 53 can move inward or outward along the inner wall of the second inner rod 56. When the U-shaped seat 50 moves upward or downward, the two bayonet pins 53 can be driven to move inward or outward through the engagement of the second sliding pin 51 and the second oblique key groove 52. When the bayonet pin 53 moves outward, it can engage with the slot 54, thereby locking the length of the telescopic rod. When the bayonet pin 53 moves inward, it can disengage from the slot 54. At this time, the telescopic rod can be telescoped up and down, that is, the shock absorbing device can work normally.

[0052] When the present invention is in use, the provided latch 31 and the lock plate 7 cooperate with each other, so that when the plug 9 is inserted into the socket 8, the latch 31 can be restricted from rotating. When the multi-segment threaded rod 6 rotates, the two lock pins 14 can be driven to move outwards, and when the lock pins 14 move outwards, the plug 9 can be prevented from being separated from the socket 8, thereby fixing the latch 31, that is, fixing the latch 31 at a specified position; the grease box can add lubricating oil to the contact surface between the latch 31 and the suspension link, thereby reducing friction between the two and reducing wear. The service life is improved and the driving comfort is further improved; when the multi-section threaded rod 6 rotates, the locking pin 14 can be driven to move outward to fix the latch pin 31, and at the same time, the corresponding grease box can be driven to open and the push plate 16 can be driven to move outward. When the grease box is opened, the lubricating oil can flow to the outside. When the push plate 16 moves outward, the lubricating oil inside the grease box can be pushed, so that the lubricating oil flows out to the specified position. The grease box is in a closed state under normal circumstances, which can prevent the lubricating oil from flowing out. Since the lubricating oil has a certain viscosity, the push of the push plate 16 facilitates the lubricating oil to flow out.

Claims

1. A lightweight rear suspension system for an electric vehicle, comprising a frame (1), characterized in that: The vehicle frame (1) is provided with a rear suspension on both sides, each of which includes a plurality of suspension links, each of which is hinged to the vehicle frame (1). A latch (31) is provided at the hinge between the vehicle frame (1) and the suspension links, each of which is provided with a plurality of grease boxes, each of which contains lubricating oil. A rotatable multi-section threaded rod (6) is provided inside the latch (31), each of which is provided with a push plate (16) that matches the lubricating oil. When the multi-section threaded rod (6) rotates, The invention can form a structure in which a grease box is opened and a push plate (16) is moved outward to squeeze lubricating oil; the rear suspension is also provided with a shock absorbing device hinged to the frame (1); the frame (1) is provided with a plurality of lock plates (7), each of which is provided with a plug hole (8); the latch (31) is provided with a plug (9) matching the plug hole (8); the latch (31) is also provided with a plurality of lock pins (14); and when the multi-section threaded rod (6) is rotated, the lock pin (14) can form a structure in which the lock pin (14) moves outward.

2. A lightweight rear suspension system for an electric vehicle as claimed in claim 1, characterized in that: The frame (1) is provided with a plurality of hinged seats (3), the latch pins (31) are respectively mounted on the inner walls of the corresponding hinged seats (3), the lock plates (7) are respectively fixedly connected to the corresponding hinged seats (3), the end surfaces of one side of the latch pins (31) are respectively fixedly connected with pin caps (4), the multi-section threaded rods (6) are respectively rotatably connected to the inner walls of the latch pins (31), and the outer surfaces of the multi-section threaded rods (6) are also respectively fixedly connected with first handles (5).

3. The lightweight rear suspension system of an electric vehicle as claimed in claim 1, characterized in that: One side of the outer surface of the multi-section threaded rod (6) is threadedly connected to a first threaded barrel (10), and two first guide plates (11) are fixedly connected to the outer surface of the first threaded barrel (10) on both sides. The locking pins (14) are slidably connected to the inner walls at both ends of the plug (9), and the inner ends of the two locking pins (14) are fixedly connected to first sliding pins (12), and the first guide plates (11) are respectively provided with first oblique key slots (13) that match the first sliding pins (12).

4. The lightweight rear suspension system of an electric vehicle as claimed in claim 1, characterized in that: Two threaded sleeves (20) are respectively threadedly connected to the middle of the outer surface of the multi-section threaded rod (6); the lubrication box (15) is respectively fixed to the inner wall of the latch (31); a plurality of leakage holes (18) are respectively opened on both sides of the outer end surface of the lubrication box (15); U-shaped plugging plates (17) matching the corresponding leakage holes (18) are respectively slidably connected to the inner walls of both sides of the lubrication box (15); and the U-shaped plugging plates (17) are respectively fixed to the corresponding threaded sleeves (20).

5. A lightweight rear suspension system for an electric vehicle as claimed in claim 4, characterized in that: Four evenly distributed telescopic push rods are respectively hinged on the outer surface of the threaded sleeve (20), the push plates (16) are respectively slidably connected to the inner wall of the grease box, and the outer ends of the telescopic push rods are respectively hinged on the corresponding push plates (16).

6. A lightweight rear suspension system for an electric vehicle as claimed in claim 5, characterized in that: The telescopic push rods respectively comprise a first outer tube (21) and a first inner rod (22); the first inner rod (22) is slidably connected to the inner wall of the first outer tube (21); an anti-slip pad (23) slidably connected to the first outer tube (21) is fixedly connected to one end surface 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 connected to the anti-slip pad (23); and the other end of the first tension spring (24) is fixedly connected to the inner wall of the top end of the first outer tube (21).

7. A lightweight rear suspension system for an electric vehicle as claimed in claim 2, characterized in that: The inner walls at both ends of the first handle (5) are slidably connected to support seats (26), the pin cap (4) is fixedly connected to a gear ring (25), the support seat (26) is provided with a locking tooth (27) matching with the gear ring (25), and the inner walls at both ends of the first handle (5) are also fixedly connected to first springs (28) matching with the support seat (26).

8. A lightweight rear suspension system for an electric vehicle as claimed in claim 7, characterized in that: The support seat (26) is fixedly connected to the end surfaces on both sides thereof, and the inner walls of the extension seats (32) are slidably connected to square boxes (33), and the inner walls of the square boxes (33) are slidably connected to guide pins (35). The inner walls of the bottom ends of the square boxes (33) are fixedly connected to small springs (34) that match the guide pins (35). The lower end surface of the first handle (5) is respectively provided with a first transverse groove (36), a first oblique groove (37), a second transverse groove (38) and a second oblique groove (39) that match the guide pins (35).

9. The lightweight rear suspension system of an electric vehicle as claimed in claim 1, characterized in that: The shock absorbing device comprises a telescopic rod, which comprises a second outer tube (57) and a second inner rod (56). The second inner rod (56) is slidably connected to the inner wall of the second outer tube (57). The inner wall of the bottom end of the second inner rod (56) is fixedly connected to an anti-drop seat (55) slidably connected to the second outer tube (57). The top end of the second outer tube (57) is fixedly connected to a second connecting plate (58). The top end of the second inner rod (56) is fixedly connected to a first connecting plate (45). A shock absorbing spring (59) is provided between the first connecting plate (45) and the second connecting plate (58).

10. A lightweight rear suspension system for an electric vehicle as claimed in claim 9, characterized in that: The inner walls of the second inner rod (56) are respectively provided with rotatable outer shafts (46), the inner walls of the outer shafts (46) are respectively slidably connected with inner shafts (47), the inner shafts (47) are respectively fixed with first threaded rods (48), the inner walls of the second inner rod (56) are respectively fixed with threaded seats (49) threadedly connected to the first threaded rods (48), the inner walls of the second inner rod (56) are also respectively slidably connected with U-shaped seats (50) rotatably connected to the first threaded rods (48), the inner walls of the second inner rod (56) are respectively slidably connected with bayonet pins (53), the inner side ends of the two bayonet pins (53) are respectively fixedly connected with second sliding pins (51), the U-shaped seats (50) are respectively provided with second oblique key slots (52) matched with the second sliding pins (51), and the inner walls of the second outer cylinder (57) are respectively provided with a plurality of bayonet slots (54) matched with the bayonet pins (53).

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