CN119018276B

CN119018276B - Front fork buffer structure of electric vehicle

Info

Publication number: CN119018276B
Application number: CN202411518067.4A
Authority: CN
Inventors: 刘家磊; 顾宸康
Original assignee: Xuzhou Xingfujia Electric Vehicle Co ltd
Current assignee: Xuzhou Xingfujia Electric Vehicle Co ltd
Priority date: 2024-10-29
Filing date: 2024-10-29
Publication date: 2025-04-29
Anticipated expiration: 2044-10-29
Also published as: CN119018276A

Abstract

The invention discloses a front fork buffer structure of an electric vehicle, which belongs to the technical field of shock absorbers and comprises an outer tube, an inner tube and a damping assembly, wherein an oil storage cavity is arranged in the outer tube, the inner tube is connected to the outer tube in a sliding manner, the damping assembly is arranged at one end of the inner tube, which is positioned in the outer tube, and comprises a plurality of pistons which are arranged in the oil storage cavity in a sliding manner, the oil storage cavity is divided into a plurality of chambers by the pistons, and a damping unit is arranged in the chamber between two adjacent pistons. According to the invention, the damping component is arranged, when the inner pipe reciprocates on the outer pipe, hydraulic oil in the outer pipe passes through the first through hole on the connecting pipe and the flow regulating piece, when the inner pipe is pressed, the damping component moves downwards, the inner spring gradually pushes against the piston, so that the fluid passing capacity of the flow regulating piece is reduced, the resistance of the hydraulic oil passing through the damping component is gradually increased, the vibration energy is consumed, and the vibration reduction effect is obtained.

Description

Front fork buffer structure of electric vehicle

Technical Field

The invention relates to the technical field of shock absorbers, in particular to a front fork buffer structure of an electric vehicle.

Background

Today, the electric vehicle industry rapidly develops, and the performance and the comfort of the electric vehicle serving as an environment-friendly and convenient transportation tool become important focuses of consumer attention. The front fork of the electric vehicle is used as a key component for connecting the wheels and the vehicle body, and the buffer performance of the front fork of the electric vehicle is directly related to the stability and the comfort level in the riding process. The front fork buffer structure of the modern electric vehicle starts to adopt a more complex hydraulic damping system, and achieves more accurate and efficient damping effect through the flowing of oil and the generation of damping force. However, the existing front fork buffer structure of the electric vehicle still has some defects in design and implementation, such as limited vibration reduction effect when facing complex and changeable riding road surfaces, and is difficult to flexibly adjust according to the actual requirements of the riders, so that the buffer structure cannot meet the individual requirements of different riders.

Disclosure of Invention

Aiming at the technical defects, the invention aims to provide the front fork buffer structure of the electric vehicle, which can better damp vibration by arranging the damping component.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention provides an electric vehicle front fork buffer structure, comprising:

The outer tube is used for being connected with a rotating shaft of the tire, and an oil storage cavity is arranged in the outer tube;

the inner tube is connected to the outer tube in a sliding manner, and an end cover is arranged at one end, far away from the outer tube, of the inner tube;

the sealing cover is arranged at the end part of the outer tube and is used for sealing a gap between the outer tube and the inner tube;

The damping assembly is arranged at one end of the inner pipe, which is positioned in the outer pipe, and comprises a plurality of pistons which are slidably arranged in the oil storage cavity, the plurality of pistons divide the oil storage cavity into a plurality of chambers, damping units are arranged in the chambers between two adjacent pistons, each damping unit comprises a connecting pipe and a flow regulating piece sleeved on the connecting pipe, two ends of the connecting pipe are slidably arranged on the two adjacent pistons respectively, a first through hole is formed in the side wall of the connecting pipe, and the inner cavities of the adjacent connecting pipes are communicated;

The inner spring is arranged in the outer tube and abuts against the piston at the lowest end;

The outer spring is sleeved on the inner tube between the end cover and the sealing cover;

The damping assembly comprises a damping assembly, a first through hole formed in the side wall of the damping assembly, a second through hole formed in the side wall of the damping assembly, a first through hole formed in the damping assembly.

Preferably, the piston at the uppermost layer is an upper piston, the piston at the lowermost layer is a lower piston, the piston between the upper piston and the lower piston is a middle piston, a second through hole for communicating the chambers at the upper side and the lower side is formed in the middle piston, a third through hole for communicating the upper oil storage chamber and the lower chamber is formed in the upper piston, a fourth through hole is formed in the lower piston and the middle piston, and the connecting pipe is installed on the fourth through hole in a sliding sealing mode.

Preferably, the inner tube is rotationally provided with an adjusting rod, one end of the adjusting rod, which is close to the damping component, is provided with a blind hole, a locking rod is arranged in the blind hole in a threaded manner, the locking rod penetrates through all pistons, a key slot is formed in the inner tube, a limit key matched with the key slot is arranged on the locking rod, and one end of the locking rod, which extends to the lower side of the piston at the lowest layer, is fixedly provided with a clamping plate.

Preferably, the locking rod passes through the upper piston, the connecting pipe and the fourth through hole, and a sealing ring is arranged between the locking rod and the upper piston.

Preferably, the upper piston, the middle piston and the lower piston are provided with bosses for restraining the sliding position of the connecting pipe.

Preferably, the flow rate adjusting member includes:

The connecting pipe penetrates through the fifth through hole, the first through hole is positioned between the inner rings of the two elastic pieces, and the diameter of the inner rings is larger than the outer diameter of the connecting pipe;

the damping sleeve is sleeved on the outer rings of the two elastic pieces, and a plurality of oil grooves are formed in one side, close to the inner wall of the outer tube, of the damping sleeve.

Preferably, the flow regulating member further comprises two limiting rings, the two limiting rings respectively prop against the surfaces of the two elastic members, which are away from each other, and the limiting rings are provided with a plurality of sixth through holes.

Preferably, the inner tube is arranged in the outer tube, overflow holes are formed in the side wall above the damping component, and an overflow cavity is formed in the inner tube.

The invention has the beneficial effects that:

The invention provides a damping component, when an inner pipe reciprocates on an outer pipe, hydraulic oil in the outer pipe passes through a first through hole and a flow regulating part on a connecting pipe, when the inner pipe is pressed, the damping component moves downwards, an inner spring gradually pushes against a piston, so that the fluid passing capacity of the flow regulating part is reduced, the resistance of the hydraulic oil passing through the damping component is gradually increased, the vibration energy is consumed, and the vibration reduction effect is achieved.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a perspective view of an overall structure of a front fork buffer structure of an electric vehicle according to an embodiment of the present invention.

Fig. 2 is a top view of the overall structure of the present invention.

Fig. 3 is a cross-sectional view at A-A in fig. 2.

Fig. 4 is a partial enlarged view at a in fig. 3.

Fig. 5 is a partial enlarged view at B in fig. 3.

Fig. 6 is a partial enlarged view at C in fig. 5.

Fig. 7 is a perspective view of a damping assembly of the present invention.

Fig. 8 is a perspective view of a flow regulating member of the present invention.

Reference numerals illustrate:

1. outer tube, 2, oil storage chamber, 3, inner tube, 4, end cap, 5, sealing cap, 6, chamber, 7, connecting tube, 8, flow regulator, 9, first through hole, 10, inner spring, 11, outer spring, 12, upper piston, 13, middle piston, 14, lower piston, 15, second through hole, 16, third through hole, 17, fourth through hole, 18, adjusting rod, 19, blind hole, 20, locking lever, 21, keyway, 22, limit key, 23, clamping plate, 24, sealing ring, 25, boss, 26, elastic piece, 27, fifth through hole, 28, inner ring, 29, outer ring, 30, damping sleeve, 31, oil groove, 32, limit ring, 33, sixth through hole, 34, overflow hole, 35, overflow chamber.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Embodiment one:

as shown in fig. 1 to 8, a first embodiment of the present invention provides an electric vehicle front fork buffer structure, which comprises two buffer assemblies, each buffer assembly comprises an outer tube 1, an inner tube 3, a sealing cover 5, a damping assembly, an inner spring 10 and an outer spring 11, wherein the two outer tubes 1 are fixedly connected through a bridge, top covers are arranged at the tops of the two inner tubes 3, and the two top covers are fixedly connected through a steering seat.

In use, the bottom of the outer tube 1 is mounted on the spindle of the tyre. An oil storage cavity 2 is arranged in the outer tube 1 and can store hydraulic oil. The top of the outer tube 1 is provided with a sealing cover 5, and the inner tube 3 is in sliding sealing fit with the sealing cover 5. The lower end of the inner tube 3 is inserted into the oil storage chamber 2. The sealing cover 5 is provided with a sealing ring 24 to prevent hydraulic oil in the oil storage cavity 2 from overflowing from a gap between the outer pipe 1 and the inner pipe 3. The damping assembly is provided at the end of the inner tube 3 inserted into the outer tube 1. The outer spring 11 is sleeved on the inner tube 3 between the end cover 4 and the sealing cover 5, and the outer spring 11 plays a supporting role. When jolting occurs during running of the vehicle, the inner tube 3 is influenced by the vehicle frame, the outer spring 11 is compressed and moves towards the outer tube 1, and then the outer spring 11 is reset, so that the inner tube 3 is jacked up. In this process, the damping assembly is lifted and lowered in the outer tube 1 along with the movement of the inner tube 3, and acts with the hydraulic oil in the oil storage chamber 2 to generate a damping effect and absorb vibration energy.

As shown in fig. 5 to 8, the damping assembly of the present invention includes four pistons slidably mounted in the oil storage chamber 2, and for convenience of distinction, the uppermost piston is referred to as an upper piston 12, the lowermost piston is referred to as a lower piston 14, and the two intermediate pistons are referred to as intermediate pistons 13. The four pistons divide the oil storage chamber 2 into three chambers 6, the upper piston 12 and the middle piston 13 form one chamber 6, one chamber 6 is formed between the two middle pistons 13, the lower piston 14 and the middle piston 13 form one chamber 6, and damping units are arranged in the three chambers 6.

As shown in fig. 5, the lower piston 14 and the middle piston 13 are provided with fourth through holes 17, and the upper piston 12 is provided with a circular groove facing the middle piston 13. The damping unit comprises a connecting pipe 7 and a flow regulating piece 8 sleeved on the connecting pipe 7. The two ends of the connecting pipe 7 between the upper piston 12 and the middle piston 13 are respectively slidably and hermetically installed in the circular groove and the fourth through hole 17. The two ends of the other two connecting pipes 7 are slidably and hermetically mounted on the adjacent fourth through holes 17. A boss 25 for restricting the sliding position of the connecting pipe 7 is provided in each of the fourth through hole 17 and the circular groove. The side wall of the connecting pipe 7 is provided with a first through hole 9, and the inner cavities of the adjacent connecting pipes 7 are communicated through a fourth through hole 17. So that when the damping assembly moves downwards, the hydraulic oil below will enter all the connecting pipes 7 above from the fourth through holes 17 of the lower piston 14 and pass through the first through holes 9 in the connecting pipes 7 into the chamber 6. The middle piston 13 is provided with a second through hole 15 for communicating the upper side chamber 6 with the lower side chamber 6, and the upper piston 12 is provided with a third through hole 16 for communicating the upper side oil storage chamber 2 with the lower side chamber 6. In this way, the hydraulic oil that enters the chamber 6 from the first through hole 9 can communicate with the upper reservoir 2 through the second through hole 15 and the third through hole 16. The inner spring 10 is disposed below the damping assembly within the outer tube 1, with the upper end of the inner spring 10 abutting the lower surface of the lower piston 14.

Through the arrangement, when the inner pipe 3 moves on the outer pipe 1, the damping component can act with hydraulic oil in the oil storage cavity 2, and when the hydraulic oil flows through the damping component from the upper part or the lower part of the damping component, the damping component is influenced by the flow limiting effect of the first through hole 9, so that the damping buffer effect is realized.

Embodiment two:

On the basis of the first embodiment, as shown in fig. 5 to 8, the flow regulator 8 of the present invention includes two circular disc-shaped elastic members 26, and a fifth through hole 27 is formed in the middle of the elastic member 26. The elastic member 26 may employ an existing disc spring. The outer rings 29 of the two elastic members 26 abut, while the inner rings 28 are distanced from each other. The connection pipe 7 passes through the fifth through hole 27, the first through hole 9 is located between the inner rings 28 of the two elastic members 26, and the diameter of the inner ring 28 is larger than the outer diameter of the connection pipe 7, so that the hydraulic oil flowing from the first through hole 9 into the connection pipe 7 between the two elastic members 26 can flow into the chamber 6 from the gap between the inner ring 28 and the outer wall of the connection pipe 7.

In order to more stably maintain the positional relationship between the two elastic members 26, as shown in fig. 8, a damping sleeve 30 is sleeved on the outer rings 29 of the two elastic members 26, a groove is formed on one side of the damping sleeve 30 facing the elastic members 26, and the outer rings 29 of the elastic members 26 are abutted in the groove. A plurality of oil grooves 31 are formed in one side of the damping sleeve 30, which is close to the inner wall of the outer tube 1. As the inner tube 3 moves downwards, the damping assembly gradually abuts against the inner spring 10, which causes the resilient member 26 to deform under pressure. When the disc-shaped elastic member 26 is deformed by compression, the diameter of the outer ring 29 increases, while the diameter of the inner ring 28 decreases. Therefore, the gap between the inner ring 28 and the outer wall of the connection pipe 7 is further narrowed, which increases the resistance when the hydraulic oil passes therethrough, thereby increasing the damping. Meanwhile, the damping sleeve 30 can be formed by splicing two half sleeves, when the diameter of the outer ring 29 is increased, the two half sleeves can be spread, so that the damping sleeve 30 abuts against the inner wall of the outer tube 1, the damping force of mechanical friction is further increased, and the vibration energy is consumed.

Considering that the inner ring 28 of the elastic member 26 directly abuts against the piston surface, the hydraulic oil passing ability may be greatly reduced. Therefore, the limiting rings 32 are arranged on the surfaces of the two elastic pieces 26, which are away from each other, the elastic pieces 26 are propped against the limiting rings 32, the limiting rings 32 are propped against the piston, and a plurality of sixth through holes 33 are formed in the limiting rings 32. In this way, hydraulic oil passing through a gap between the inner ring 28 of the elastic member 26 and the outer wall of the connection pipe 7 can enter the chamber 6 through the sixth through hole 33.

As shown in fig. 4, it is considered that the space of the liquid storage chamber is reduced when the inner tube 3 moves into the outer tube 1. In order to allow the hydraulic oil to flow, an overflow hole 34 is provided in the side wall of the inner tube 3 located in the outer tube 1 above the damping assembly, and an overflow chamber 35 is provided in the inner tube 3. Thus, the hydraulic oil extruded from the liquid storage cavity due to the movement of the inner pipe 3 into the outer pipe 1 can enter the overflow cavity 35 from the overflow hole 34, so that the clamping is avoided.

Embodiment III:

On the basis of the first embodiment and the second embodiment, in order to enable a user to actively adjust the damping. The invention is provided with an adjusting rod 18 rotatably arranged in the inner tube 3, and one end of the adjusting rod 18 extends out from the top of the inner tube 3 after penetrating through the end cover 4. One end of the adjusting rod 18, which is close to the damping component, is provided with a blind hole 19, a locking rod 20 is installed in the blind hole 19 through threads, the inner tube 3 is provided with a key groove 21, the locking rod 20 is provided with a limit key 22 matched with the key groove 21, when the top of the adjusting rod 18 is rotated, the adjusting rod 18 rotates, and the locking rod 20 can move up and down in the inner tube 3 under the action of the threads because the locking rod 20 is limited to rotate by the limit key 22 and the key groove 21.

As shown in fig. 3 and 5, the locking rod 20 passes through all the pistons, the bottom of the locking rod 20 extends below the lower piston 14 and is fixed with a clamping plate 23, and the clamping plate 23 is also provided with a through hole, so that the clamping plate 23 is prevented from influencing the hydraulic oil to enter and exit the fourth through hole 17.

Since the locking lever 20 passes through the upper piston 12, the connection pipe 7 and the fourth through hole 17, a sealing ring 24 is provided between the locking lever 20 and the upper piston 12 in order to prevent hydraulic oil from flowing through a gap between the locking lever 20 and the upper piston 12.

Through the setting, the user rotates the regulation pole 18, can adjust the height of splint 23 for splint 23 cooperation inner tube 3 presss from both sides tight piston, thereby compression elastic component 26, plays the effect of adjusting the clearance size between elastic component 26 inner circle 28 and the connecting pipe 7 outer wall, adjusts hydraulic oil throughput, and then adjusts the damping size.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. An electric vehicle front fork buffer structure, characterized by comprising:

the outer tube (1), the said outer tube (1) is used for connecting the spindle of the tire, there are oil storage chambers (2) in the said outer tube (1);

The inner tube (3) is in sliding connection with the outer tube (1), and an end cover (4) is arranged at one end, far away from the outer tube (1), of the inner tube (3);

The sealing cover (5) is arranged at the end part of the outer tube (1) and is used for sealing a gap between the outer tube (1) and the inner tube (3);

the damping assembly is arranged at one end of the inner pipe (3) positioned in the outer pipe (1), the damping assembly comprises a plurality of pistons which are slidably arranged in the oil storage cavity (2), the plurality of pistons divide the oil storage cavity (2) into a plurality of chambers (6), damping units are arranged in the chambers (6) between two adjacent pistons, each damping unit comprises a connecting pipe (7) and a flow regulating piece (8) sleeved on the connecting pipe (7), two ends of the connecting pipe (7) are slidably arranged on two adjacent pistons respectively, a first through hole (9) is formed in the side wall of the connecting pipe (7), and the inner cavities of the adjacent connecting pipes (7) are communicated;

an inner spring (10), wherein the inner spring (10) is arranged in the outer tube (1) and is propped against the piston at the lowest end;

The outer spring (11) is sleeved on the inner tube (3) between the end cover (4) and the sealing cover (5);

The oil storage cavities (2) below the damping components are communicated with all connecting pipes (7), first through holes (9) formed in the side walls of the connecting pipes (7) are communicated with the cavities (6) through flow adjusting pieces (8), all the cavities (6) are communicated, and the cavity (6) at the uppermost layer is communicated with the oil storage cavities (2) above the damping components;

The flow rate regulating member (8) includes:

The connecting pipe (7) passes through the fifth through hole (27), the first through hole (9) is positioned between the inner rings (28) of the two elastic pieces (26), and the diameter of the inner rings (28) is larger than the outer diameter of the connecting pipe (7);

the damping sleeve (30) is sleeved on the outer rings (29) of the two elastic pieces (26), a plurality of oil through grooves (31) are formed in one side, close to the inner wall of the outer tube (1), of the damping sleeve (30), the damping sleeve (30) is formed by splicing two half sleeves, and when the diameter of the outer ring (29) is increased, the two half sleeves are propped against the inner wall of the outer tube (1);

The flow regulating part (8) further comprises two limiting rings (32), the two limiting rings (32) respectively abut against the surfaces of the two elastic parts (26) which face away from each other, and a plurality of sixth through holes (33) are formed in the limiting rings (32).

2. The front fork buffer structure of the electric vehicle according to claim 1, characterized in that the piston at the uppermost layer is an upper piston (12), the piston at the lowermost layer is a lower piston (14), the piston between the upper piston (12) and the lower piston (14) is an intermediate piston (13), a second through hole (15) for communicating the upper and lower side chambers (6) is formed in the intermediate piston (13), a third through hole (16) for communicating the upper side oil storage chamber (2) with the lower side chamber (6) is formed in the upper piston (12), a fourth through hole (17) is formed in the lower piston (14) and the intermediate piston (13), and the connecting pipe (7) is mounted on the fourth through hole (17) in a sliding sealing manner.

3. An electric vehicle front fork buffer structure as claimed in claim 2, characterized in that the inner tube (3) is rotatably provided with an adjusting rod (18), one end of the adjusting rod (18) close to the damping component is provided with a blind hole (19), a locking rod (20) is arranged in the blind hole (19) in a threaded manner, the locking rod (20) penetrates through all pistons, the inner tube (3) is provided with a key slot (21), the locking rod (20) is provided with a limit key (22) matched with the key slot (21), and one end of the locking rod (20) extending to the lower part of the piston of the lowest layer is fixedly provided with a clamping plate (23).

4. A front fork buffer structure of an electric vehicle according to claim 3, characterized in that the locking lever (20) passes through the upper piston (12), the connecting pipe (7) and the fourth through hole (17), and a sealing ring (24) is arranged between the locking lever (20) and the upper piston (12).

5. An electric vehicle front fork buffer structure as claimed in claim 2, characterized in that the upper piston (12), the middle piston (13) and the lower piston (14) are provided with bosses (25) for restricting the sliding position of the connecting tube (7).

6. An electric vehicle front fork buffer structure as claimed in claim 1, characterized in that the inner tube (3) is arranged in the outer tube (1) and provided with overflow holes (34) on the side wall above the damping assembly, and an overflow cavity (35) is arranged in the inner tube (3).