Front fork damping structure of electric vehicle

Abstract

The invention relates to the technical field of electric vehicle accessories, and discloses a front fork damping structure of an electric vehicle. The cleaning assembly is installed in the shell, and the cleaning assembly comprises a rotating disc, a driving gear and a cleaning part; the driving part comprises a fixing sleeve, a push rod and a rotating cylinder, the fixing sleeve is fixed to the periphery of the damping rod, the push rod is fixedly arranged on the fixing sleeve, the rotating cylinder is rotationally installed in the shell, the push rod penetrates through the shell and extends into the rotating cylinder, a spiral groove is formed in the rotating cylinder, and a guide block is arranged on the periphery of the push rod; the guide block moves along the spiral groove, and a driving gear is arranged on the periphery of the rotary drum; and the ash removal part is mounted at the top of the shell. Through the arrangement of the rotary cleaning assembly driven by the driving piece, an oil film attached to the surface of the damping rod can be actively and continuously removed, media attached to dust are fundamentally reduced, and the path that the dust invades into a sealing system along with the oil film is effectively blocked.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicle accessories, in particular to a front fork damping structure of an electric vehicle. BACKGROUND

[0002] The front fork damper is a key component in the suspension system of an electric vehicle, and its performance is directly related to the vehicle's handling stability, driving safety and riding comfort. Currently, the mainstream front fork damper of electric vehicles on the market mostly adopts a damping structure combining hydraulic pressure and mechanical springs. This structure usually includes a front fork frame connected to the front wheel, a damping cylinder fixed to the vehicle body, and a damping rod that can extend and retract relative to the damping cylinder. The damping cylinder is filled with hydraulic oil of a specific viscosity to provide damping force; at the same time, lubricating oil is applied to the moving pair between the damping cylinder and the damping rod to ensure smooth movement. To prevent oil leakage, an oil seal is provided at the opening of the damping cylinder for primary sealing.

[0003] In actual use, the surface of the damping rod is easily contaminated by road dust, sand and other pollutants because it is always exposed to the external environment. Although a dust seal (dust ring) for preventing dust is usually provided outside the oil seal, which can scrape off most of the attached contaminants when the damping rod is retracted, some fine dust particles can easily stick to the oil film and enter the internal space through the dust lip of the dust seal due to the fact that the dust seal is not absolutely sealed and there is often an oil film inside due to the slight leakage of oil from the oil seal or the upward movement of lubricating oil. After these invading dust mixes with the internal oil, a mixture with abrasive properties is formed, which continuously scrapes the sealing lips of the oil seal and the dust seal during the reciprocating movement of the damping rod, causing the sealing material to wear out faster. Once the sealing performance of the oil seal or the dust seal deteriorates, it will cause leakage of hydraulic oil or lubricating oil. Not only will the leakage of oil reduce the effective oil volume in the damping cylinder, change the damping characteristics, and cause the damping effect to decay and the vehicle stability to decrease, but it will also make it easier for dust to invade, forming a vicious cycle of "wear-leakage-more invasion", significantly shortening the service life and maintenance cycle of the front fork damper. SUMMARY

[0004] The present application aims to overcome the shortcomings of the prior art and provide a front fork damping structure of an electric vehicle to effectively block dust invasion, protect internal sealing components, prevent oil leakage, and thus maintain the damping performance for a long time.

[0005] The object of the present application can be achieved by the following technical solution: A front fork damping structure of an electric vehicle, comprising a front fork frame, a damping cylinder, an oil seal and a damping rod, the structure further comprising: an outer shell, the outer shell being threadedly connected to the top end of the damping cylinder, and the damping rod extending into the damping cylinder through the outer shell; The cleaning assembly is installed in the shell, and comprises a rotating disc, a driving gear and a cleaning piece. The driving piece comprises a fixing sleeve, a push rod and a rotating drum. The ash cleaning piece is installed on the top of the shell.

[0006] The cleaning piece comprises a main rotating roller, a secondary rotating roller, a wiping cloth and a protective ring.

[0007] The shell is internally fixedly provided with an internal gear ring.

[0008] The protective ring is internally provided with a plurality of telescopic scrapers.

[0009] The rotating disc is provided with a plurality of groups of adjusting pieces.

[0010] The end of the activity plate and the rotating disc are provided with elastic pieces.

[0011] As a further scheme of the present application: the ash removal element comprises a gas injection cylinder, a dust seal and a gas injection cylinder, the gas injection cylinder is fixed on the top of the shell, the dust seal is arranged on the top of the gas injection cylinder, the gas injection cylinder is arranged on the top of the shell, the push rod penetrates the gas injection cylinder, and the gas injection cylinder supplies gas into the gas injection cylinder.

[0012] As a further scheme of the present application: the gas injection cylinder is symmetrically arranged with a baffle ring inside and outside, the push rod penetrates the two groups of baffle rings, the push rod is provided with a piston outside, the piston is located between the two groups of baffle rings and the piston is attached to the inner wall of the gas injection cylinder, the distance between the two groups of baffle rings is greater than the range of the shock absorbing rod moving up and down, the baffle ring and the end of the gas injection cylinder are respectively provided with an air inlet pipe and an air outlet pipe, the air outlet pipe is connected with the gas injection cylinder through a pipe, and a plurality of gas injection holes are formed on the top of the gas injection cylinder, the plurality of gas injection holes are inclined and face the top end of the dust seal.

[0013] The beneficial effects of the present application are: (1) In the present application, by arranging the rotary cleaning assembly driven by the driving element, the adhering oil film on the surface of the shock absorbing rod can be actively and continuously removed, thereby fundamentally reducing the medium for dust adhesion and effectively blocking the path of dust invading the sealing system with the oil film; (2) In the present application, the combination of the self-adaptive adjusting cleaning element and the telescopic scraper can closely fit the surface of the shock absorbing rod which may shake due to vibration, ensuring stable scraping and wiping effect under any working condition and improving the reliability of cleaning; (3) In the present application, the air blowing ash removal element driven by the reciprocating motion of the shock absorbing rod can form a dynamic air curtain around the dust seal, actively drive away the dust, and form a synergistic protection with the passive cleaning mechanism, thereby constructing a double dust prevention system of "active cleaning + air curtain protection", and significantly improving the long-term stability of the durability and shock absorbing performance of the sealing element. BRIEF DESCRIPTION OF DRAWINGS

[0014] The present application will be further described below with reference to the accompanying drawings.

[0015] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the cross-sectional structure of the present application; Figure 3 is a schematic diagram of the structure of the driving element and the ash removal element in the present application; Figure 4 is a schematic diagram of the internal structure of the shell in the present application; Figure 5 is a schematic diagram of the structure of the cleaning element in the present application; Figure 6 is a schematic diagram of the structure of the telescopic scraper in the present application; Figure 7 is a schematic diagram of the structure of the adjusting element in the present application.

[0016] In the drawings: 1, front fork; 2, shock cylinder; 21, oil seal; 3, shock rod; 4, shell; 5, cleaning assembly; 51, rotating disc; 511, outer gear ring; 512, sliding groove; 52, driving gear; 53, inner gear ring; 54, cleaning piece; 541, rotating gear; 542, main rotating roller; 543, auxiliary rotating roller; 544, wiping cloth; 545, protective ring; 5451, mounting groove; 5452, movable groove; 6, driving piece; 61, fixed sleeve; 62, push rod; 621, guide block; 622, piston; 63, rotating drum; 631, spiral groove; 7, dust cleaning piece; 71, air injection cylinder; 711, air injection hole; 72, dust seal; 73, air injection cylinder; 731, blocking ring; 732, air inlet pipe; 733, air outlet pipe; 8, adjusting piece; 81, movable plate; 811, wedge-shaped block one; 812, elastic piece one; 82, sliding plate; 821, pressure roller; 822, wedge-shaped block two; 823, elastic piece two; 9, telescopic scraper. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0018] As Figures 1-7 shown, a front fork shock absorbing structure of an electric vehicle includes a front fork 1, a shock cylinder 2, an oil seal 21 and a shock rod 3. The structure further includes: a shell 4, the shell 4 is threadedly connected with a top end of the shock cylinder 2, and the shock rod 3 extends into the shock cylinder 2 through the shell 4; a cleaning assembly 5, the cleaning assembly 5 is installed in the shell 4, and the cleaning assembly 5 includes a rotating disc 51, a driving gear 52 and a cleaning piece 54. The rotating disc 51 is rotationally installed in the shell 4, the rotating disc 51 is provided with an outer gear ring 511 at the periphery thereof, and a plurality of sets of cleaning pieces 54 are installed on the rotating disc 51 and abut against the periphery of the shock rod 3; a driving piece 6, the driving piece 6 includes a fixed sleeve 61, a push rod 62 and a rotating drum 63. The fixed sleeve 61 is fixed to the periphery of the shock rod 3, the push rod 62 is fixedly arranged on the fixed sleeve 61, the rotating drum 63 is rotationally installed in the shell 4, the push rod 62 extends through the shell 4 and into the rotating drum 63, a spiral groove 631 is formed in the rotating drum 63, the push rod 62 is provided with a guide block 621 at the periphery thereof, the guide block 621 moves along the spiral groove 631, and the rotating drum 63 is provided with the driving gear 52 at the periphery thereof, the driving gear 52 and the outer gear ring 511 are in mesh with each other; a dust cleaning piece 7, the dust cleaning piece 7 is installed at the top of the shell 4.

[0019] The cleaning member 54 comprises a main rotating roller 542, a secondary rotating roller 543, a wiping cloth 544 and a protective ring 545. The main rotating roller 542 is rotatably installed on the rotating disc 51. The protective ring 545 is provided with a plurality of installation grooves 5451. The secondary rotating roller 543 is rotatably installed in the installation grooves 5451. The wiping cloth 544 is wound around the periphery of the main rotating roller 542 and the secondary rotating roller 543, and is attached to the periphery of the shock rod 3.

[0020] In one case of the embodiment, the wiping cloth 544 can be lint-free cloth, such as glasses cloth, superfine fiber cloth, etc.

[0021] In actual application of the embodiment, during use of the front fork shock absorption, when the shock rod 3 moves upward, the shock rod 3 moves the push rod 62 upward through the fixing sleeve 61. The push rod 62 moves in the rotating drum 63. Through cooperation of the guide block 621 and the spiral groove 631, the rotating drum 63 rotates when the push rod 62 moves upward. The rotating drum 63 drives the driving gear 52 to rotate. The driving gear 52 drives the rotating disc 51 to rotate through cooperation with the outer gear ring 511. After the rotating disc 51 rotates, a plurality of cleaning members 54 rotate around the shock rod 3, that is, the wiping cloth 544 rotates around the shock rod 3 and is attached to the surface of the shock rod 3. When the shock rod 3 moves upward, most of the oil can be blocked by the oil seal 21. There is still an oil film on the shock rod 3. When the oil film moves to the cleaning member 54, the oil film on the surface of the shock rod 3 can be cleaned through rotation of the wiping cloth 544, so that the surface of the shock rod 3 is free of oil film when the shock rod 3 moves out of the shock absorption cylinder 2, thereby reducing dust adhering to the surface of the shock rod 3. When the shock rod 3 moves downward, a small amount of dust adhering to the shock rod 3 is scraped off by the external dust seal. Since the dust is only adhered to the surface of the shock rod 3, compared with being adhered to the oil film, the dust is easier to be scraped off at this time, thereby effectively avoiding the dust from passing through the lip of the dust seal, and further avoiding the dust from causing abrasion of the dust seal and the oil seal 21, and ensuring the shock absorption effect of the front fork shock absorption.

[0022] Further, the inner gear ring 53 is fixedly arranged in the housing 4 and located outside the outer gear ring 511. The main rotating roller 542 is provided with a rotating gear 541, and the rotating gear 541 is engaged with the inner gear ring 53.

[0023] In actual application, when the plurality of cleaning members 54 are driven to rotate by the rotating disc 51, the main rotating roller 542 is driven to rotate through the cooperation of the rotating gear 541 and the inner tooth ring 53, so that the wiping cloth 544 is moved on the main rotating roller 542 and the auxiliary rotating roller 543 when rotating around the shock rod 3. In this way, the wiping cloth 544 is prevented from being always in contact with the surface of the shock rod 3 at one position, the wiping cloth 544 is continuously moved to switch the position in contact with the surface of the shock rod 3, the effect of removing the oil film is improved, dust passing through the dust-sealed lip to cause abrasion of the dust seal and the oil seal 21 is further avoided, and the shock-absorbing effect of the front fork shock absorber is ensured.

[0024] Further, a plurality of telescopic scrapers 9 are arranged inside the protective ring 545 and are attached to the periphery of the shock rod 3.

[0025] In actual application, when the rotating disc 51 rotates, the protective ring 545 also rotates, so that the telescopic scraper 9 rotates around the surface of the shock rod 3, thereby scraping the oil film on the surface of the shock rod 3. In this way, most of the oil film can be scraped, and when the wiping cloth 544 moves to this position, the wiping cloth 544 only needs to remove a small amount of oil film, thereby improving the service life of the wiping cloth 544. When the shock rod 3 is in the state of stretching up and down, the shock rod 3 may shake in the horizontal direction. The telescopic scraper 9 can be elastically stretched and contracted to ensure that the telescopic scraper 9 is always attached to the surface of the shock rod 3, thereby ensuring the oil scraping effect.

[0026] Further, a plurality of adjusting members 8 are installed on the rotating disc 51. The adjusting member 8 comprises a movable plate 81 and a sliding plate 82. A plurality of movable grooves 5452 are formed in the protective ring 545 and are located below and communicated with the mounting grooves 5451. The movable plate 81 is slidably installed in the movable grooves 5452. The auxiliary rotating roller 543 is rotatably installed on the top of the movable plate 81. A plurality of sliding grooves 512 are formed in the top of the rotating disc 51. Two groups of sliding plates 82 are symmetrically slidably installed in the sliding grooves 512. A pressure roller 821 is rotatably installed on the top of the sliding plate 82 and abuts against the outside of the wiping cloth 544.

[0027] An elastic member one 812 is arranged between the end of the movable plate 81 and the rotating disc 51. An elastic member two 823 is connected between the sliding plate 82 and the sliding groove 512. Two groups of wedge-shaped blocks one 811 are symmetrically arranged at the end of the movable plate 81. A wedge-shaped block two 822 is arranged at the end of the sliding plate 82. The inclined surface of the wedge-shaped block one 811 abuts against the inclined surface of the wedge-shaped block two 822. When the wedge-shaped block one 811 moves towards the wedge-shaped block two 822, the two groups of wedge-shaped blocks two 822 move towards each other.

[0028] In one case of the embodiment, the elastic member one 812 initially presses the movable plate 81 to make the secondary rotating roller 543 always have a tendency to move towards the damping rod 3; the elastic member two 823 initially presses the sliding plate 82 to make the pressing roller 821 always have a tendency to move towards the wiping cloth 544.

[0029] In actual application, the damping rod 3 is in a vibrating state when it is stretched up and down, so that the damping rod 3 can shake in the horizontal direction; when the damping rod 3 shakes and presses the wiping cloth 544 and the secondary rotating roller 543, the secondary rotating roller 543 moves along the movable groove 5452 through the movable plate 81, so that the elastic member one 812 is compressed, and the two groups of sliding plates 82 move towards each other through the cooperation of the wedge-shaped block one 811 and the wedge-shaped block two 822, so that the two groups of pressing rollers 821 press the wiping cloth 544, so that the wiping cloth 544 is always in a tension state between the primary rotating roller 542 and the secondary rotating roller 543, and the wiping cloth 544 is ensured to move around the primary rotating roller 542 and the secondary rotating roller 543; when the damping rod 3 shakes away from the wiping cloth 544 and the secondary rotating roller 543, the movable plate 81 drives the secondary rotating roller 543 and the wiping cloth 544 to move towards the damping rod 3 under the elastic force of the elastic member one 812, and at the same time, the two groups of pressing rollers 821 move away from each other through the cooperation of the wedge-shaped block one 811 and the wedge-shaped block two 822, so that the wiping cloth 544 relaxes and moves towards the damping rod 3, thereby ensuring that the wiping cloth 544 is always attached to the surface of the damping rod 3; in this way, the wiping cloth 544 can effectively remove the oil film, thereby ensuring the damping effect of the front fork damping.

[0030] As shown in Figure 3 and Figure 4 , the dust removal member 7 includes the air injection cylinder 71, the dust seal 72 and the gas injection cylinder 73, the air injection cylinder 71 is fixed on the top of the shell 4, the dust seal 72 is arranged on the top of the air injection cylinder 71, the gas injection cylinder 73 is arranged on the top of the shell 4, the push rod 62 penetrates through the gas injection cylinder 73, and the gas injection cylinder 73 supplies gas into the air injection cylinder 71.

[0031] The gas injection cylinder 73 is symmetrically provided with the retaining rings 731 inside up and down, the push rod 62 penetrates through the two groups of retaining rings 731, the push rod 62 is provided with the piston 622 on the periphery, the piston 622 is located between the two groups of retaining rings 731 and is attached to the inner wall of the gas injection cylinder 73, the distance between the two groups of retaining rings 731 is greater than the range of the damping rod 3 moving up and down, the gas inlet pipe 732 and the gas outlet pipe 733 are arranged between the retaining rings 731 and the end of the gas injection cylinder 73 respectively, the gas outlet pipe 733 is connected with the air injection cylinder 71 through the conduit, and a plurality of air injection holes 711 are formed on the top of the air injection cylinder 71.

[0032] In one case of the embodiment, a filter screen is arranged at the gas inlet pipe 732, and a one-way valve is arranged at the gas inlet pipe 732 and the gas outlet pipe 733.

[0033] When the damping rod 3 moves up in actual application, the push rod 62 drives the piston 622 to move up, the piston 622 extrudes the air in the upper half of the air injection cylinder 73, the air in the air injection cylinder 73 is injected into the air injection cylinder 71 through another air outlet pipe 733 and a guide pipe, and finally is sprayed out through a plurality of air injection holes 711, thereby avoiding dust from approaching the damping rod 3 and reducing the amount of dust adhering to the damping rod 3; when the damping rod 3 moves down, the push rod 62 drives the piston 622 to move down, the piston 622 extrudes the air in the lower half of the air injection cylinder 73, the air in the air injection cylinder 73 is injected into the air injection cylinder 71 through the air outlet pipe 733 and the guide pipe, and finally is sprayed out through a plurality of air injection holes 711, which can avoid dust from approaching the damping rod 3 on the one hand and the dust seal 72 on the other hand, and blows away the dust scraped off by the dust seal 72, so that the dust can effectively avoid passing through the lip of the dust seal, thereby avoiding the dust from causing the dust seal and the oil seal 21 to wear, and ensuring the damping effect of the front fork damping; When the piston 622 extrudes the air in the air injection cylinder 73, the piston 622 and the air injection cylinder 73 form an auxiliary damping system, which cooperates with the damping rod 3 along the damping cylinder 2, thereby improving the damping effect.

[0034] Working principle: when the front fork damping structure starts to work, that is, when the damping rod 3 reciprocates up and down relative to the damping cylinder 2, the driving part 6 is first started, when the damping rod 3 moves up, the fixed sleeve 61 fixed thereon drives the push rod 62 to move up together, the guide block 621 on the push rod 62 slides in the spiral groove 631 in the rotating cylinder 63, forcing the rotating cylinder 63 to rotate, and the rotation of the rotating cylinder 63 is transmitted to the cleaning assembly 5 through the driving gear 52 on the periphery thereof; The driving gear 52 is engaged with the outer gear ring 511 on the periphery of the rotating disc 51, thereby driving the rotating disc 51 to rotate in the outer shell 4, and a plurality of sets of cleaning parts 54 installed on the rotating disc 51 revolve around the damping rod 3, in the revolving process, since the rotating gear 541 on the main rotating roller 542 is engaged with the inner gear ring 53 fixed in the outer shell 4, the main rotating roller 542 also rotates, driving the wiping cloth 544 around it to move circularly between the main rotating roller 542 and the auxiliary rotating roller 543, at the same time, the telescopic scraper 9 inside the protective ring 545 also rotates with the rotating disc 51, so that the oil film carried by the damping rod 3 in the upward movement process is first scraped off by the rotating telescopic scraper 9, and the remaining trace of oil stains is wiped clean by the wiping cloth 544 which moves circularly and closely adheres to the damping rod 3, so that the segment of the damping rod 3 extending out of the damping cylinder 2 remains clean and dry, greatly reducing the adhesion of dust; Meanwhile, the dust cleaning member 7 works synchronously, the up-and-down movement of the push rod 62 drives the piston 622 on it to reciprocate in the air injection cylinder 73, when the piston 622 moves up, the gas in the upper chamber of the air injection cylinder 73 is compressed, the gas is pressed into the air injection cylinder 71 through the gas outlet pipe 733 and the conduit, and finally sprayed out from the air injection hole 711 which is inclined to the top of the dust seal 72, forming a gas flow which blows to the external area of the dust seal 72, the gas flow can form a gas curtain around the exposed section of the shock rod 3, blow away the dust which tries to approach, and blow away the dust which falls off from the dust seal 72 in time, when the piston 622 moves down, the gas in the lower chamber is compressed to achieve the same air injection effect, the air injection process is synchronized with the shock absorbing movement, and dynamic dustproof protection is continuously provided; In addition, when the shock rod 3 shakes laterally, the adjusting member 8 works, if the shock rod 3 extrudes the wiping cloth 544 and the secondary rotating roller 543 on one side, the secondary rotating roller 543 retreats after compressing the elastic member one 812 through the movable plate 81, the wedge-shaped block one 811 at the end of the movable plate 81 pushes the wedge-shaped block two 822 on the two slide plates 82, so that the two groups of slide plates 82 move towards each other with the pressing roller 821, thereby tensioning the wiping cloth 544 and preventing it from loosening, when the shock rod 3 shakes reversely, the movable plate 81 is pushed forward under the resetting action of the elastic member one 812, the wedge-shaped block one 811 and the wedge-shaped block two 822 are disengaged, the slide plate 82 is reset by the elastic member two 823, and the pressure of the pressing roller 821 on the wiping cloth 544 is reduced, so that the wiping cloth 544 can tightly adhere to the surface of the shock rod 3 together with the secondary rotating roller 543, and the elasticity of the telescopic scraper 9 also ensures its continuous contact with the surface of the shock rod 3.

Claims

1. A front fork damping structure of an electric vehicle, comprising a front fork bracket (1), a damping cylinder (2), an oil seal (21), and a damping rod (3), characterized in that, The structure further comprises: a shell (4) which is threadedly connected with the top end of the damping cylinder (2), and the damping rod (3) extends into the damping cylinder (2) through the shell (4); a cleaning assembly (5) which is installed in the shell (4) and comprises a rotating disc (51), a driving gear (52) and cleaning pieces (54), the rotating disc (51) is rotatably installed in the shell (4), the outer periphery of the rotating disc (51) is provided with an outer gear ring (511), and a plurality of groups of cleaning pieces (54) are installed on the rotating disc (51) and abut against the outer periphery of the damping rod (3); a driving piece (6) which comprises a fixing sleeve (61), a push rod (62) and a rotating drum (63), the fixing sleeve (61) is fixed on the outer periphery of the damping rod (3), the push rod (62) is fixedly arranged on the fixing sleeve (61), the rotating drum (63) is rotatably installed in the shell (4), the push rod (62) extends through the shell (4) and into the rotating drum (63), a spiral groove (631) is formed in the rotating drum (63), the outer periphery of the push rod (62) is provided with a guide block (621), the guide block (621) moves along the spiral groove (631), the outer periphery of the rotating drum (63) is provided with the driving gear (52), and the driving gear (52) and the outer gear ring (511) are in meshing engagement; an ash removal piece (7) which is installed on the top of the shell (4).

2. The front fork damping structure of an electrically driven vehicle according to claim 1, characterized by The cleaning piece (54) comprises a main rotating roller (542), an auxiliary rotating roller (543), a wiping cloth (544) and a protective ring (545), the main rotating roller (542) is rotatably installed on the rotating disc (51), a plurality of installation grooves (5451) are formed in the protective ring (545), the auxiliary rotating roller (543) is rotatably installed in the installation groove (5451), and the wiping cloth (544) is wound around the outer peripheries of the main rotating roller (542) and the auxiliary rotating roller (543) and abuts against the outer periphery of the damping rod (3).

3. The front fork damping structure of the electrically driven vehicle according to claim 2, characterized by An inner gear ring (53) is fixedly arranged in the shell (4), the inner gear ring (53) is located outside the outer gear ring (511), a rotating gear (541) is arranged on the main rotating roller (542), and the rotating gear (541) and the inner gear ring (53) are in meshing engagement.

4. The front fork damping structure of the electrically driven vehicle according to claim 3, characterized by A plurality of telescopic scrapers (9) are arranged on the inner side of the protective ring (545) and abut against the outer periphery of the damping rod (3).

5. The front fork damping structure of the electrically driven vehicle according to claim 3, characterized by A plurality of adjusting pieces (8) are installed on the rotating disc (51), the adjusting piece (8) comprises a movable plate (81) and a sliding plate (82), a plurality of movable grooves (5452) are formed in the protective ring (545), the movable grooves (5452) are below the mounting grooves (5451) and communicate with the mounting grooves (5451), the movable plate (81) is slidably installed in the movable grooves (5452), the sub-rotating roller (543) is rotatably installed on the top of the movable plate (81), a plurality of sliding grooves (512) are formed in the top of the rotating disc (51), two groups of sliding plates (82) are symmetrically slidably installed in the sliding grooves (512), the pressure roller (821) is rotatably installed on the top of the sliding plate (82), and the pressure roller (821) abuts against the outer side of the wiping cloth (544).

6. The front fork damping structure of the electrically driven vehicle according to claim 5, characterized by The elastic member one (812) is installed between the end of the movable plate (81) and the rotating disc (51), the elastic member two (823) is connected between the sliding plate (82) and the sliding groove (512), the two groups of wedge-shaped blocks one (811) are symmetrically arranged on the end of the movable plate (81), the wedge-shaped block two (822) is arranged on the end of the sliding plate (82), the inclined surface on the wedge-shaped block one (811) abuts against the inclined surface on the wedge-shaped block two (822), and when the wedge-shaped block one (811) moves towards the wedge-shaped block two (822), the two groups of wedge-shaped block two (822) move towards each other.

7. The shock absorbing structure of a front fork of an electric vehicle according to claim 1, characterized by, The ash removal piece (7) comprises a gas injection cylinder (71), a dust cover (72) and a gas injection cylinder (73), the gas injection cylinder (71) is fixed on the top of the shell (4), the dust cover (72) is arranged on the top of the gas injection cylinder (71), the gas injection cylinder (73) is arranged on the top of the shell (4), the push rod (62) penetrates through the gas injection cylinder (73), and the gas injection cylinder (73) supplies gas into the gas injection cylinder (71).

8. The front fork damping structure of the electrically driven vehicle according to claim 7, characterized by The stop ring (731) is symmetrically arranged in the gas injection cylinder (73), the push rod (62) penetrates through the two groups of stop rings (731), the piston (622) is arranged on the periphery of the push rod (62), the piston (622) is located between the two groups of stop rings (731) and abuts against the inner wall of the gas injection cylinder (73), the distance between the two groups of stop rings (731) is greater than the moving range of the shock-absorbing rod (3) in the up-down direction, the air inlet pipe (732) and the air outlet pipe (733) are arranged between the stop ring (731) and the end of the gas injection cylinder (73) respectively, the air outlet pipe (733) is connected with the gas injection cylinder (71) through a pipeline, a plurality of gas injection holes (711) are formed in the top of the gas injection cylinder (71), and the plurality of gas injection holes (711) are inclined and arranged towards the top end of the dust cover (72).

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