Integrated frame of electric vehicle

Abstract

The present invention relates to the technical field of electric vehicle frames, and in particular to an integrated frame of an electric vehicle, comprising a frame body, a primary shock-absorbing assembly arranged on the front side of the frame body, and a secondary shock-absorbing assembly arranged on the front side of the primary shock-absorbing assembly; a front fork is arranged on the front side of the frame body, a basket is installed on the front side of the front fork, a handlebar frame is commonly installed on two shock-absorbing cylinders, and the bottom two sides of the handlebar frame are respectively inserted into the two shock-absorbing cylinders; the primary shock-absorbing assembly comprises a shock absorber installed in the two shock-absorbing cylinders; the secondary shock-absorbing spring will perform a buffering through an extrusion effect, and this buffering effect is superimposed on the primary buffering effect generated by the primary shock-absorbing spring in the primary shock-absorbing assembly, and is better reflected on the handlebar frame, the two sides of the handlebar frame are used to install the handlebars, so when the vehicle is bumpy, through the above two buffering stages, the rider's arms can be more comfortable than the existing shock-absorbing by the shock absorber alone.

Description

Technical Field

[0001] The invention relates to the technical field of electric vehicle frames, and in particular to an integrated frame of an electric vehicle. Background Art

[0002] In order to improve the strength of electric vehicles and prevent them from deformation, the existing frames of electric vehicles are mostly formed in one piece, and the forming processes include cutting, bending, forming and assembly. In order to make the frame lightweight, the frame is mostly made of pipe fittings, such as carbon steel, stainless steel pipes, etc. In order to further prevent the deformation of the frame when the tires of electric vehicles pass through bumpy sections, and to reduce the vibration of the user's arms and improve the comfort of the arms, a shock absorber is often set on the front fork of the frame. The existing shock absorber consists of a shock absorber rod and a spring. A shock absorber cylinder is set on the front fork. The shock absorber rod is installed at the bottom of the handlebar frame and inserted into the shock absorber cylinder. The spring is sleeved on the shock absorber rod, and a shock absorption effect is formed between the shock absorber cylinder and the shock absorber rod. When the tire vibrates when riding on a bumpy section, the spring drives the shock absorber rod to complete the lifting action in the shock absorber cylinder, so that the handlebar frame achieves the purpose of vibration reduction and buffering. This vibration reduction method is relatively simple. Since the basket is located at the front side of the frame, when a large vibration occurs, the basket cannot buffer, which will cause damage to the items in the fence. Therefore, how to improve the buffering effect while applying the amplified buffering effect to the basket to prevent damage to the items is a problem that people in the current technical field need to solve. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides an integrated frame of an electric vehicle, the integrated frame of the electric vehicle comprises a frame body, a primary vibration reduction assembly arranged on the front side of the frame body, and a secondary vibration reduction assembly arranged on the front side of the primary vibration reduction assembly;

[0004] A front fork is provided on the front side of the frame body, a basket is installed on the front side of the front fork, a damping cylinder is provided on the left and right sides of the front fork respectively, a handlebar frame is installed on the two damping cylinders, and the bottom sides of the handlebar frame are respectively inserted into the two damping cylinders;

[0005] The primary vibration reduction assembly includes a vibration reducer installed in the two vibration reduction cylinders; the top ends of the two vibration reducers are respectively connected to the bottom ends of the left and right sides of the handlebar frame;

[0006] The bottom ends of the two shock absorbers are each installed with a rack which is respectively perpendicular to the two shock absorber cylinders; a through hole is respectively opened on the inner side of the two shock absorber cylinders, and a bearing is respectively embedded in the two through holes, and a horizontal rotating shaft is commonly installed between the two bearings, and the two ends of the rotating shaft respectively enter the two shock absorber cylinders and are respectively installed with a gear, and the two gears are respectively meshed with the two racks;

[0007] The secondary vibration damping assembly includes a carrier plate welded in the basket, a vibration damping plate located in the basket and above the carrier plate, left and right lifting rods welded to the bottom surface of the vibration damping plate, and a secondary vibration damping spring respectively sleeved on the two lifting rods, the carrier plate is provided with left and right insertion holes, the bottom ends of the two lifting rods are inserted into the two insertion holes, the top ends of the two lifting rods are connected to the vibration damping plate, and the upper and lower ends of the secondary vibration damping spring are respectively abutted between the vibration damping plate and the carrier plate;

[0008] The secondary vibration damping assembly also includes a gear train transmission component, which includes a driving wheel installed on the rotating shaft and located on the inner sides of the two vibration damping cylinders, a driven wheel installed on the inner sides of the two vibration damping cylinders and respectively located above the two driving wheels, a toothed belt connected between the driving wheel and the driven wheel, and a connecting rod structure that is transmission-connected between the two driven wheels and the bottom surface of the vibration damping plate. When the primary vibration damping assembly performs a primary vibration damping action on the handlebar frame, it also drives the rotating shaft to rotate by meshing the rack with the gear, and the rotating shaft drives the gear train transmission component to move, and the connecting rod structure drives the vibration damping plate to frequently squeeze the secondary vibration damping spring to perform a secondary vibration damping action on the handlebar frame.

[0009] As a further preference, the frame body is welded in one step, a wheel axle is provided at the bottom end thereof, and the rotating shaft is parallel to the wheel axle.

[0010] As a further preferred embodiment, the shock absorber is a spring-type shock absorber, which is composed of a shock absorber rod installed at the bottom ends of both sides of the handlebar frame and a primary shock absorber spring sleeved on the shock absorber rod, the rack is connected to the bottom end of the shock absorber rod, the shock absorber cylinder is a stepped hole, and the shock absorber rod is provided with a reducing portion, and the upper and lower ends of the primary shock absorber spring are abutted between the reducing portion and the bottom end of the stepped hole. When the shock absorber is absorbing vibration, the shock absorber rod rises and falls along the shock absorber cylinder, and at the same time, the primary shock absorber spring is compressed by squeezing the reducing portion.

[0011] As a further preferred embodiment, an eccentric shaft is provided on the driven wheel, one end of the connecting rod structure is movably connected to the eccentric shaft, and the other end of the connecting rod structure is movably connected to the bottom surface of the vibration damping plate.

[0012] As further preferred, the vibration damping plate is horizontal and parallel to the bottom surface of the basket.

[0013] As a further preferred embodiment, a connecting hole is provided on the vibration damping plate, and the size of the vibration damping plate is smaller than the inner cavity of the vehicle basket, so that a gap is formed between the four sides of the vibration damping plate and the four sides of the inner cavity of the vehicle basket, and a movable opening is provided at the bottom of the vehicle basket, and the two connecting rod structures enter the vehicle basket from the movable opening at the bottom of the vehicle basket and are movably connected to the bottom surface of the vibration damping plate.

[0014] As further preferred, the rack meshes with the front tooth surface of the gear, the damper rod in the primary damping assembly moves downward, and the primary damping spring is compressed by the reducing portion. When the handlebar frame is subjected to the primary damping action, the rack meshes with the gear to rotate counterclockwise, and the gear drives the driving wheel to rotate counterclockwise through the rotating shaft, and the driving wheel drives the driven wheel to rotate counterclockwise through the toothed belt, and the driven wheel drives the connecting rod structure to drive the damping plate to rise, and at the same time, the secondary damping spring between the damping plate and the carrier plate is elastically released upward; conversely, when the damping rod rises, the rack meshes with the gear to rotate clockwise, and the gear drives the driving wheel to rotate clockwise through the rotating shaft, and the driving wheel drives the driven wheel to rotate clockwise through the toothed belt, and the driven wheel drives the connecting rod structure to drive the damping plate to rise, and at the same time, the secondary damping spring between the damping plate and the carrier plate is compressed again.

[0015] As further preferred, a decorative cover is installed on the inner side of the front fork, and the decorative cover covers the rotating shaft, the driving wheel, the toothed belt and the driven wheel.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: when the wheel is bumped, the generated vibration is transmitted from the wheel axle to the frame body, and then from the frame body to the handlebar frame. At this time, the damping rods at the bottom ends of both sides of the handlebar frame will reduce vibration along the two damping cylinders, and at the same time, the reducer is used to squeeze the primary damping spring, so that the primary damping spring completes a compression action in the damping cylinder. When the primary damping spring performs the above-mentioned compression action, it is equivalent to causing the handlebar frame to complete a buffering. To achieve buffering, when the damping rod descends along the damping cylinder, it will lift and lower with the rack, and the rack meshes with the gear to rotate clockwise or counterclockwise, and the gear drives the rotating shaft to rotate clockwise or counterclockwise, and the rotating shaft drives the driving wheel to rotate clockwise or counterclockwise, and the driving wheel drives the driven wheel to rotate clockwise or counterclockwise through the toothed belt, and the driven wheel drives the eccentric shaft The eccentric shaft rotates clockwise and counterclockwise, and the connecting rod structure is driven to extend and retract by the eccentric shaft, and the vibration damping plate is driven to rise and fall through the other end of the connecting rod structure. When the vibration damping plate is raised and lowered, the lifting rod is driven to rise and fall along the jack to ensure that the vibration damping plate is lifted and lowered smoothly. Every time the vibration damping plate descends, it will squeeze the secondary vibration damping spring once, and the secondary vibration damping spring will complete an extrusion action at the bottom of the vibration damping plate, that is, the secondary vibration damping spring will perform a buffering through the extrusion effect, and this buffering effect is superimposed on the primary buffering effect generated by the primary vibration damping spring in the primary vibration damping assembly, which is better reflected on the handlebar frame. The two sides of the handlebar frame are used to install the handlebars. Therefore, when the vehicle is bumpy, through the above two buffering stages, the rider's arms can be more comfortable than the existing vibration damping by the shock absorber alone. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A bottom view schematically showing an integrated frame of an electric vehicle provided in an embodiment of the present invention;

[0018] Figure 2 The integrated frame of the electric vehicle provided by the embodiment of the present invention is composed of Figure 1 The enlarged schematic diagram of the A part is shown;

[0019] Figure 3 The integrated frame of the electric vehicle provided by the embodiment of the present invention is composed of Figure 1 The schematic diagram of the structure from the front side perspective is introduced;

[0020] Figure 4 A schematic diagram of a side plan structure of an integrated frame of an electric vehicle provided in an embodiment of the present invention;

[0021] Figure 5 A schematic diagram of an integrated frame of an electric vehicle provided in an embodiment of the present invention with the basket removed;

[0022] Figure 6 The integrated frame of the electric vehicle provided by the embodiment of the present invention is composed of Figure 5 The schematic diagram of the partial section drawn in;

[0023] Figure 7 The integrated frame of the electric vehicle provided by the embodiment of the present invention is composed of Figure 6 The enlarged schematic diagram of the B part is shown;

[0024] Figure 8 The schematic diagram of the partial structure of the vibration damping rod in the primary vibration damping assembly of the electric vehicle provided by the embodiment of the present invention. In the figure: 1, frame body; 2, primary vibration damping assembly; 3, secondary vibration damping assembly; 4, front fork; 5, basket; 6, vibration damping cylinder; 7, handlebar frame; 8, shock absorber; 9, rack; 10, through hole; 11, bearing; 12, rotating shaft; 13, gear; 14, carrier plate; 15, vibration damping plate; 16, lifting rod; 17, secondary vibration damping spring; 18, jack; 19, gear train transmission assembly; 20, driving wheel; 21, driven wheel; 22, toothed belt; 23, connecting rod structure; 24, wheel axle; 25, vibration damping rod; 26, primary vibration damping spring; 27, diameter reducing part; 28, eccentric shaft; 29, connecting hole; 30, movable port. DETAILED DESCRIPTION

[0025] The above and other embodiments and advantages of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

[0026] In one embodiment, Figure 1-Figure 8 As shown:

[0027] This embodiment provides an integrated frame of an electric vehicle, including a frame body 1, a primary vibration reduction assembly 2 arranged on the front side of the frame body 1, and a secondary vibration reduction assembly 3 arranged on the front side of the primary vibration reduction assembly 2; the frame body is made once, and the present invention only adds functions and improves the structure of the local position on the front side, so in the following description of the present invention, only the front part is used as the standard, and it is not necessary to express all the shapes of the frame body 1 in the drawings. The primary vibration reduction assembly 2 and the secondary vibration reduction assembly 3 are mainly arranged on the frame body 1, wherein the primary vibration reduction assembly 2 is based on the existing shock absorber principle, and the secondary vibration reduction assembly 3 amplifies the vibration reduction effect generated by the primary vibration reduction assembly 2, and at the same time extends the vibration reduction effect generated by the secondary vibration reduction assembly 3 to the vehicle basket 5.

[0028] A front fork 4 is provided at the front side of the frame body 1, a basket 5 is provided at the front side of the front fork 4, a damping cylinder 6 is provided at the left and right sides of the front fork 4, a handlebar frame 7 is installed on the two damping cylinders 6, and the bottom sides of the handlebar frame 7 are respectively inserted into the two damping cylinders 6;

[0029] The primary vibration reduction assembly 2 includes a vibration reduction device 8 installed in two vibration reduction cylinders 6; the top ends of the two vibration reduction devices 8 are respectively connected to the bottom ends of the left and right sides of the handlebar frame 7;

[0030] The bottom ends of the two shock absorbers 8 are each provided with a rack 9 which is respectively vertical in the two shock absorber cylinders 6; a through hole 10 is respectively opened on the inner side of the two shock absorber cylinders 6, and a bearing 11 is respectively embedded in the two through holes 10, and a horizontal rotating shaft 12 is commonly installed between the two bearings 11, and the two ends of the rotating shaft 12 respectively enter the two shock absorber cylinders 6 and are respectively provided with a gear 13, and the two gears 13 are respectively meshed on the two racks 9;

[0031] The secondary vibration damping assembly 3 includes a carrier plate 14 welded in the vehicle basket 5, a vibration damping plate 15 located in the vehicle basket 5 and above the carrier plate 14, left and right lifting rods 16 welded to the bottom surface of the vibration damping plate 15, and a secondary vibration damping spring 17 respectively sleeved on the two lifting rods 16. The carrier plate 14 is provided with left and right insertion holes 18. The bottom ends of the two lifting rods 16 are inserted into the two insertion holes 18. The top ends of the two lifting rods 16 are connected to the vibration damping plate 15. The upper and lower ends of the secondary vibration damping spring 17 are respectively pressed between the vibration damping plate 15 and the carrier plate 14.

[0032] The secondary vibration reduction assembly 3 also includes a gear train transmission component 19, which includes a driving wheel 20 installed on the rotating shaft 12 and located on the inner side of the two vibration reduction cylinders 6, a driven wheel 21 installed on the inner side of the two vibration reduction cylinders 6 and respectively located above the two driving wheels 20, a toothed belt 22 connected between the driving wheel 20 and the driven wheel 21, and a connecting rod structure 23 that is transmission-connected between the two driven wheels 21 and the bottom surface of the vibration reduction plate 15. When the primary vibration reduction assembly 2 performs the primary vibration reduction action on the handlebar frame 7, it also drives the rotating shaft 12 to rotate by engaging the rack 9 with the gear 13, and the rotating shaft 12 drives the gear train transmission component 19 to move, and the connecting rod structure 23 drives the vibration reduction plate 15 to frequently squeeze the secondary vibration reduction spring 17, so as to perform the secondary vibration reduction action on the handlebar frame 7; the frame body 1 is welded once, and a wheel axle 24 is provided at its bottom end, and the rotating shaft 12 is parallel to the wheel axle 24.

[0033] The shock absorber 8 is a spring type shock absorber 8, which is composed of a shock absorber rod 25 installed at the bottom ends of both sides of the handlebar frame 7 and a primary shock absorber spring 26 sleeved on the shock absorber rod 25. The rack 9 is connected to the bottom end of the shock absorber rod 25. The shock absorber cylinder 6 is a stepped hole. The shock absorber rod 25 is provided with a reducing portion 27. The upper and lower ends of the primary shock absorber spring 26 are pressed between the reducing portion 27 and the bottom end of the stepped hole. When the shock absorber 8 is damping vibration, the shock absorber rod 25 rises and falls along the shock absorber cylinder 6, and at the same time, the reducing portion 27 squeezes the primary shock absorber spring 26 to compress the action.

[0034] An eccentric shaft 28 is disposed on the driven wheel 21 , one end of the connecting rod structure 23 is movably connected to the eccentric shaft 28 , and the other end of the connecting rod structure 23 is movably connected to the bottom surface of the vibration damping plate 15 .

[0035] When the wheel is bumped during riding, the vibration generated is transmitted from the wheel axle 24 to the frame body 1, and then from the frame body 1 to the handlebar frame 7. At this time, the damping rods 25 at the bottom ends of both sides of the handlebar frame 7 will reduce vibration along the two damping tubes 6, and at the same time, the reducer 27 is used to squeeze the primary damping spring 26, so that the primary damping spring 26 completes a compression action in the damping tube 6. When the primary damping spring 26 performs the above-mentioned compression action, it is equivalent to causing the handlebar frame 7 to complete a buffering. In order to achieve the buffering, when the damping rod 25 descends along the damping tube 6, it will lift and lower with the rack 9, and the rack 9 meshes with the gear 13 to rotate clockwise or counterclockwise, and the gear 13 drives the rotating shaft 12 to rotate clockwise or counterclockwise, and the rotating shaft 12 drives the driving wheel 20 to rotate clockwise or counterclockwise, and the driving wheel 20 drives the driven wheel 21 to rotate clockwise or counterclockwise through the toothed belt 22, and the driven wheel 21 drives the eccentric shaft 28 The eccentric shaft 28 rotates clockwise and counterclockwise, and the connecting rod structure 23 is driven to extend and retract by the eccentric shaft 28, and the vibration damping plate 15 is driven to rise and fall through the other end of the connecting rod structure 23. When the vibration damping plate 15 is raised and lowered, the lifting rod 16 is driven to rise and fall along the insertion hole 18 to ensure that the vibration damping plate 15 is raised and lowered smoothly. Every time the vibration damping plate 15 descends, the secondary vibration damping spring 17 is squeezed once, and the secondary vibration damping spring 17 completes a squeezing action at the bottom of the vibration damping plate 15, that is, the secondary vibration damping spring 17 performs a buffering through the squeezing effect, and this buffering effect is superimposed on the primary buffering effect generated by the primary vibration damping spring 26 in the primary vibration damping assembly 2, which is better reflected on the handlebar frame 7. The two sides of the handlebar frame 7 are used to install the handlebars. Therefore, when the vehicle is bumpy, through the above two buffering stages, the rider's arms can be more comfortable than the existing vibration damping by the shock absorber alone.

[0036] like Figure 4 , Figure 5 As shown, the vibration damping plate 15 is a horizontal plate, and the vibration damping plate 15 is parallel to the bottom surface of the basket 5. It can be seen that the vibration damping plate 15 is located in the basket 5 and is parallel to the bottom surface of the inner cavity of the basket 5. A connecting hole 29 is opened on the vibration damping plate 15. A thin plate or a mesh plate is connected to the vibration damping plate 15 through the connecting hole 29, which serves as a load-bearing structure at the bottom of the inner cavity of the basket 5. When an object is placed in the basket 5, its bottom surface falls on the thin plate or the mesh plate, and the vibration damping plate 15 provides support. During riding

[0037] The size of the vibration damping plate 15 is smaller than the inner cavity of the vehicle basket 5, so that a gap is formed between the four sides of the vibration damping plate 15 and the four sides of the inner cavity of the vehicle basket 5. A movable opening 30 is opened at the bottom of the vehicle basket 5, and the two connecting rod structures 23 enter the vehicle basket 5 from the movable opening 30 at the bottom of the vehicle basket 5 and are movably connected to the bottom surface of the vibration damping plate 15. During riding, the wheel is bumped and the vibration is transmitted from the wheel axle 24 to the frame body 1, and then from the frame body 1 to the handlebar frame 7. In addition to completing double buffering through the above-mentioned primary damping assembly 2 and secondary damping assembly 3, the secondary damping spring 17 in the secondary damping assembly 3 will also transmit this buffering force to the damping plate 15 when performing the above-mentioned buffering action, and then from the damping plate 15 to the thin plate or mesh plate, and then from the thin plate or mesh plate to the objects. When the objects are in the basket 5 and travel with it, they will also be buffered and protected. The initial force of this protective effect comes from the damping rod 25 in the primary damping assembly 2 descending along the damping cylinder 6 and the rack 9 at the bottom of the damping cylinder 6 meshing with the gear 13 when rotating. The primary damping assembly 2 is the front damping inherent in the existing frame, so in order to make the secondary damping spring 17 perform the secondary buffering action, no additional power is required.

[0038] like Figures 6 to 8 As shown, in another embodiment, the rack 9 meshes with the front tooth surface of the gear 13 instead of the rear tooth surface of the gear 13. It can be seen from this meshing mode that when the rack 9 descends, it will mesh with the gear 13 to rotate counterclockwise, and the gear 13 drives the rotating shaft 12 to rotate counterclockwise, and the rotating shaft 12 drives the driving wheel 20 to rotate counterclockwise, and the driving wheel 20 drives the driven wheel 21 to rotate counterclockwise through the toothed belt 22, and the driven wheel 21 drives the connecting rod structure 23 to drive the vibration damping plate 15 to rise, and at the same time, the secondary vibration damping spring 17 between the vibration damping plate 15 and the carrier plate 14 releases its length upward. In summary, when the rack 9 descends, it is actually the primary vibration damping action that descends and causes the primary vibration damping spring 26 to buffer and compress. At this time, the secondary vibration damping spring 17 releases its elastic force upward, which is exactly opposite to the compression of the primary vibration damping spring 26, that is, when the first buffer descends, the second buffer rises, and the two buffer directions are exactly opposite, thereby further improving the buffering effect. On the contrary, when the damping rod 25 rises during the buffering process, the rack 9 meshes with the gear 13 to rotate clockwise, and the gear 13 drives the driving wheel 20 to rotate clockwise through the rotating shaft 12, and the driving wheel 20 drives the driven wheel 21 to rotate clockwise through the toothed belt 22, and the driven wheel 21 drives the connecting rod structure 23 to drive the damping plate 15 to rise, and at the same time, the secondary damping spring 17 between the damping plate 15 and the carrier plate 14 is compressed again, that is, when the first buffer rises, the second buffer falls, and the two buffer directions are opposite again, and the further improvement of the buffering effect is reflected again.

[0039] A decorative cover is installed on the inner side of the front fork 4, and the decorative cover covers the rotating shaft 12, the driving wheel 20, the toothed belt 22 and the driven wheel 21 to form protection, avoid external impact, and increase the service life.

[0040] The above orientation designations do not represent the specific orientations of the components in this embodiment. This embodiment is only for the convenience of describing the scheme, and the orientation is described relatively with reference to the figure. The essence is that the specific orientations of the components are described according to their actual installation and actual use, as well as the customary orientations of those skilled in the art. This is hereby explained. The specific implementation methods described above further describe the invention objectives, technical solutions, and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An integrated frame of an electric vehicle, characterized in that: It comprises a frame body (1), a primary vibration reduction assembly (2) arranged on the front side of the frame body (1), and a secondary vibration reduction assembly (3) arranged on the front side of the primary vibration reduction assembly (2); A front fork (4) is provided on the front side of the frame body (1), a basket (5) is installed on the front side of the front fork (4), a damping cylinder (6) is provided on the left and right sides of the front fork (4), a handlebar frame (7) is installed on the two damping cylinders (6), and the bottom sides of the handlebar frame (7) are respectively inserted into the two damping cylinders (6); The primary vibration reduction assembly (2) comprises a vibration reduction device (8) installed in the two vibration reduction cylinders (6); the top ends of the two vibration reduction devices (8) are respectively connected to the bottom ends of the left and right sides of the handlebar frame (7); The bottom ends of the two vibration dampers (8) are each provided with a rack (9) respectively vertically mounted in the two vibration damping cylinders (6); a through hole (10) is respectively opened on the inner side of the two vibration damping cylinders (6); a bearing (11) is respectively embedded in the two through holes (10); a horizontal rotating shaft (12) is commonly mounted between the two bearings (11); the two ends of the rotating shaft (12) respectively enter the two vibration damping cylinders (6) and are each provided with a gear (13); the two gears (13) are respectively meshed with the two racks (9); The secondary vibration damping assembly (3) comprises a carrier plate (14) welded inside the vehicle basket (5), a vibration damping plate (15) located inside the vehicle basket (5) and above the carrier plate (14), left and right lifting rods (16) welded to the bottom surface of the vibration damping plate (15), and a secondary vibration damping spring (17) respectively sleeved on the two lifting rods (16); the carrier plate (14) is provided with left and right insertion holes (18); the bottom ends of the two lifting rods (16) are inserted into the two insertion holes (18); the top ends of the two lifting rods (16) are connected to the vibration damping plate (15); and the upper and lower ends of the secondary vibration damping spring (17) are respectively abutted between the vibration damping plate (15) and the carrier plate (14); The two-stage vibration damping assembly (3) further comprises a gear train transmission assembly (19), wherein the gear train transmission assembly (19) comprises a driving wheel (20) mounted on the rotating shaft (12) and located inside the two vibration damping cylinders (6), a driven wheel (21) mounted inside the two vibration damping cylinders (6) and located above the two driving wheels (20), a toothed belt (22) connected between the driving wheel (20) and the driven wheel (21), and a toothed belt (22) drivingly connected between the two driven wheels (21) and the vibration damping plate ( 15) bottom surface, when the primary vibration reduction assembly (2) performs the primary vibration reduction action on the handlebar frame (7), the rack (9) is also engaged with the gear (13) to drive the rotating shaft (12) to rotate, and the rotating shaft (12) drives the gear train transmission assembly (19) to move, and the connecting rod structure (23) drives the vibration reduction plate (15) to frequently squeeze the secondary vibration reduction spring (17), thereby performing the secondary vibration reduction action on the handlebar frame (7).

2. The integrated frame of an electric vehicle according to claim 1, characterized in that: The frame body (1) is welded in one step, and a wheel axle (24) is provided at the bottom end thereof, and the rotating shaft (12) is parallel to the wheel axle (24).

3. The integrated frame of the electric vehicle according to claim 2, characterized in that: The shock absorber (8) is a spring type shock absorber (8), which is composed of a shock absorber rod (25) mounted at the bottom ends of both sides of the handlebar frame (7) and a primary shock absorber spring (26) sleeved on the shock absorber rod (25); the rack (9) is connected to the bottom end of the shock absorber rod (25); the shock absorber cylinder (6) is a stepped hole; the shock absorber rod (25) is provided with a reducing portion (27); the upper and lower ends of the primary shock absorber spring (26) are pressed between the reducing portion (27) and the bottom end of the stepped hole; when the shock absorber (8) is damping vibration, the shock absorber rod (25) rises and falls along the shock absorber cylinder (6), and at the same time, the primary shock absorber spring (26) is compressed by the reducing portion (27).

4. The integrated frame of the electric vehicle according to claim 3, characterized in that: An eccentric shaft (28) is provided on the driven wheel (21), one end of the connecting rod structure (23) is movably connected to the eccentric shaft (28), and the other end of the connecting rod structure (23) is movably connected to the bottom surface of the vibration damping plate (15).

5. The integrated frame of the electric vehicle according to claim 4, characterized in that: The vibration damping plate (15) is horizontal, and the vibration damping plate (15) is parallel to the bottom surface of the basket (5).

6. The integrated frame of the electric vehicle according to claim 5, characterized in that: The vibration damping plate (15) is provided with a connection hole (29). The size of the vibration damping plate (15) is smaller than the inner cavity of the vehicle basket (5), so that a gap is formed between the four sides of the vibration damping plate (15) and the four sides of the inner cavity of the vehicle basket (5). The bottom of the vehicle basket (5) is provided with a movable opening (30). The two connecting rod structures (23) enter the vehicle basket (5) from the movable opening (30) at the bottom of the vehicle basket (5) and are movably connected to the bottom surface of the vibration damping plate (15).

7. The integrated frame of an electric vehicle according to claim 6, characterized in that: When the rack (9) meshes with the front tooth surface of the gear (13), the damping rod (25) in the primary damping assembly (2) moves downward, and the primary damping spring (26) is compressed by the diameter reducing portion (27). When the handlebar frame (7) is subjected to the primary damping action, the rack (9) meshes with the gear (13) to rotate counterclockwise, and the gear (13) drives the driving wheel (20) to rotate counterclockwise through the rotating shaft (12). The driving wheel (20) drives the driven wheel (21) to rotate counterclockwise through the toothed belt (22), and the driven wheel (21) drives the connecting rod structure (23) to drive the damping plate (15) to rise. The secondary vibration damping spring (17) between the vibration damping plate (15) and the carrier plate (14) is elastically released upwardly; conversely, when the vibration damping rod (25) rises, the rack (9) engages with the gear (13) to rotate clockwise, and the gear (13) drives the driving wheel (20) to rotate clockwise through the rotating shaft (12), and the driving wheel (20) drives the driven wheel (21) to rotate clockwise through the toothed belt (22), and the driven wheel (21) drives the connecting rod structure (23) to drive the vibration damping plate (15) to rise downward, and at the same time, the secondary vibration damping spring (17) between the vibration damping plate (15) and the carrier plate (14) is compressed again.

8. The integrated frame of an electric vehicle according to claim 7, characterized in that: A decorative cover is installed on the inner side of the front fork (4), and the decorative cover covers the rotating shaft (12), the driving wheel (20), the toothed belt (22) and the driven wheel (21).

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