Rear swing-arm structure for electric scooter

Abstract

A rear swing-arm structure for an electric scooter. The rear swing-arm structure comprises a footboard rear-side portion, a telescopic shock-absorption unit, two swing arm units, two first connecting rods and a second connecting rod, wherein one end of each swing arm unit is pivoted to the footboard rear-side portion, one end of each first connecting rod is movably pivoted to the telescopic shock-absorption unit, the other end of the first connecting rod is movably pivoted to a second assembling seat of the footboard rear-side portion, and two ends of the second connecting rod are respectively pivoted to the swing arm units and the first connecting rods. When a rear wheel is subjected to a vibration impact force, the swing distance of one end of each first connecting rod automatically correspondingly matches the swing distance of a rear wheel assembling portion of the swing arm unit, that is, the length of stroke of the shock absorption action of the telescopic shock-absorption unit automatically correspondingly matches the magnitude of vibration of the rear wheel for the scooter riding in various states and on different road surfaces, thereby achieving the balance of shock absorption and buffering force, preventing from drifting and slipping during riding, increasing a road-holding force during turning and lateral turning, and therefore improving the operation and control smoothness of the scooter and the safety of riding on a road on the whole.

Description

Electric scooter rear swing arm structure

Technical field

[0001] The present invention relates to the technical field of electric scooters, and more particularly to a method for adjusting the shock-absorbing travel of a telescopic shock-absorbing unit to automatically adjust the vibration level of the rear wheel in response to the scooter's various sliding conditions and on different road surfaces, thereby achieving a balanced shock-absorbing and buffering force and avoiding a rear swing arm structure that is too hard or too soft. [Background Technology]

[0002] Because electric scooters are heavy, when riding on bumpy and uneven roads or encountering potholes, they are subjected to greater vibration and impact force, which will make people feel uncomfortable when riding and the riding stability is insufficient, affecting riding safety.

[0003] Therefore, electric scooters, especially large electric scooters, are usually equipped with shock absorbers. In addition to improving riding comfort and stability, the shock absorbers also improve safety performance.

[0004] To reduce the impact of significant bumps and vibrations caused by the vehicle's large size, large electric scooters currently typically have shock absorbers installed on the front and rear wheels. The conventional rear wheel shock absorber structure of an electric scooter typically includes a rear pedal portion, a rear swing arm, and a shock absorber. One end of the rear swing arm is movably pivoted to the rear pedal portion, and the rear wheel is connected to the other end of the rear swing arm. The shock absorber typically comprises a telescopic cylinder and a shock absorber spring, with the upper end of the cylinder connected to the rear pedal portion and the lower end connected to the rear swing arm. However, this type of shock absorber has at least the following disadvantages:

[0005] Because the upper and lower sides of the shock absorber are arranged between the rear side of the pedal and the rear swing arm, due to space constraints, the length of its shock absorbing stroke is limited, and the shock absorber is closer to the pivot point of one end of the rear swing arm at the rear side of the pedal, that is, the common swing fulcrum of the shock absorber and the rear swing arm, while the upper and lower sides of the rear wheel at the other end of the rear swing arm can swing up and down arbitrarily. Therefore, when the rear wheel is subjected to a vibration impact force, the magnitude of the vibration generated by the rear wheel is always greater than the shock absorbing stroke of the shock absorber, that is, the shock absorbing force generated by the shock absorber and the vibration impact force of the rear wheel can never be effectively balanced. Once the electric scooter is in various sliding states and on different road surfaces, the shock absorber often produces a shock absorbing force that is too hard or too soft, which affects the shock absorption comfort of the electric scooter, and makes it easy to spin and slip during sliding, and the rear wheel has poor grip, which affects the smoothness of the electric scooter's control and the safety of sliding on the road.

[0006] In summary, the rear wheel shock absorber structure and function of conventional electric scooters are still not ideal and need to be improved.

[0007] The inventor, based on the concept of continuous product improvement and innovation, conducted research and development, and after countless actual design experiments, came up with this invention.

[0008] [Summary of the invention]

[0009] The purpose of the present invention is to provide a telescopic shock-absorbing unit with a shock-absorbing stroke length that can automatically adapt to the vibration level of the rear wheel in various sliding states and on different road surfaces of the electric scooter, thereby achieving a balanced shock-absorbing and buffering force and avoiding a rear swing arm structure of the scooter that is too hard or too soft.

[0010] To achieve the above-mentioned purpose, the present invention includes a pedal rear side portion, a telescopic shock absorber unit, two swing arm units, two first connecting rods and a second connecting rod, wherein the pedal rear side portion is provided with a first assembly seat and two second assembly seats; one end of the telescopic shock absorber unit is movably pivoted to the first assembly seat; one end of the swing arm unit is movably pivoted to the first position of the second assembly seat, and the other end of the swing arm unit is provided with a rear wheel body assembly portion for assembling a rear wheel; one end of the first connecting rod is movably pivoted to the other end of the telescopic shock absorber unit, and the other end of the first connecting rod is movably pivoted to the second position of the second assembly seat; one end of the second connecting rod is movably pivoted to the swing arm unit, and the other end of the second connecting rod is movably pivoted to the first connecting rod.

[0011] The effective benefit of the present invention lies in that when the rear wheel is subjected to a vibration impact force, the swing distance of one end of the first connecting rod can automatically correspond to the swing distance of the rear wheel connection portion of the swing arm unit, that is, the shock absorbing stroke length of the telescopic shock absorber unit. In various sliding states and on different road surfaces of the scooter, the vibration of the rear wheel is automatically matched to achieve a balanced shock absorption and buffering force, avoiding too hard or too soft. In addition to improving the shock absorption comfort, it can also prevent tail swinging and slipping during sliding, and can enhance grip when turning and bending. Overall, it can enhance the smoothness of the scooter's control and the safety of sliding on the road.

[0012] Other features and specific embodiments of the present invention will be further understood from the following detailed description with reference to the accompanying drawings.

Brief Description of the Drawings

[0013] FIG1 is a perspective view of the present invention.

[0014] FIG2 is an exploded perspective view of the present invention.

[0015] FIG3 is a partial cross-sectional perspective view of the present invention.

[0016] FIG4 is a cross-sectional view of the present invention.

[0017] FIG5 is a cross-sectional view of a first example of use of the present invention.

[0018] FIG6 is a second cross-sectional view of an example of use of the present invention.

[0019] FIG7 is a diagram illustrating an example of a method in which the swing distance of one end of the first connecting rod of the present invention automatically corresponds to the swing distance of the rear wheel connection portion of the swing arm unit.

[0020] Marking Description

[0021] 1. Scooter rear swing arm structure 2. Scooter

[0022] 10..Back side of pedal 11..First set of sockets

[0023] 12..Second set of seats 13..Shaft

[0024] 14. Shaft 15. Screw

[0025] 16..Screws

[0026] 20. Telescopic shock absorber unit

[0027] 30. Swing arm unit 31. Rear wheel connection

[0028] 32..Shaft 33..Locking cover

[0029] 34..Sleeve 35..Shaft

[0030] 36..Positioning sleeve

[0031] 40..First connecting rod 41..Shaft rod

[0032] 42..Bearing 43..Sleeve

[0033] 44..Shaft

[0034] 50..Second connecting rod

[0035] 60..Rear wheel [Specific implementation method]

[0036] Referring to Figures 1 to 5 , the rear swing arm structure 1 of an electric scooter according to the present invention is disposed at the rear wheel position of the scooter 2 in this embodiment, but the present invention is not limited thereto. The rear swing arm structure 1 includes a pedal rear portion 10, a telescopic shock absorbing unit 20, two swing arm units 30, two first connecting rods 40, and a second connecting rod 50. A detailed description thereof is as follows:

[0037] The pedal rear portion 10 is provided with a first connecting seat 11 and two second connecting seats 12 .

[0038] One end of the telescopic shock-absorbing unit 20 is movably pivoted to the first connecting seat 11 .

[0039] The swing arm unit 30 has one end movably pivoted to the first position of the second assembly seat 12 , and the other end is provided with a rear wheel assembly portion 31 for assembly with a rear wheel 60 .

[0040] One end of the first connecting rod 40 is movably pivoted to the lower end of the telescopic shock absorbing unit 20 , and the other end is movably pivoted to the second position of the second assembly seat 12 .

[0041] The second connecting rod 50 has one end movably pivoted to the swing arm unit 30 and the other end movably pivoted to the first connecting rod 40 .

[0042] The telescopic shock absorbing unit 20 is movably pivoted to the first assembly seat 11 via a shaft 13 that passes through the first assembly seat 11 and one end of the telescopic shock absorbing unit 20 . Both ends of the shaft 13 are locked by screws 15 .

[0043] The swing arm unit 30 is movably pivoted to the first position of the second assembly seat 12 via a shaft 32 passing through the first position of the second assembly seat 12 and one end of the swing arm unit 30 . Both ends of the shaft 32 are locked by two locking covers 33 and screws.

[0044] The shaft 32 is further sleeved with a sleeve 34 , and the two side end surfaces of the sleeve 34 abut against the corresponding surfaces of the swing arm unit 30 , thereby defining a space between the swing arm units 30 to avoid interference with the movement of the telescopic shock absorber unit 20 , the first connecting rod 40 , and the second connecting rod 50 .

[0045] The first connecting rod 40 is pivotally connected to the other end of the telescopic shock absorbing unit 20 via a shaft 41 that passes through the bottom end of the telescopic shock absorbing unit 20 and one end of the first connecting rod 40 . Both ends of the shaft 41 are locked by screws.

[0046] The first connecting rod 40 is movably pivoted to the second position of the second connecting seat 12 at the other end of the telescopic shock absorbing unit 20 via a shaft 14 passing through the second position of the second connecting seat 12 and the other end of the first connecting rod 40. The two ends of the shaft 14 are locked by screws 16. Two bearings 42 are further provided at the pivotal connection of the other end of the first connecting rod 40.

[0047] The shaft 14 is further sleeved with a sleeve 43 , and the two side end surfaces of the sleeve 43 stop the corresponding surfaces of the first connecting rod 40 , so that a space is defined between the first connecting rod 40 to avoid interference with the movement of the telescopic shock absorbing unit 20 .

[0048] The first link 40 has a V-shape.

[0049] The second connecting rod 50 is movably pivoted to the swing arm unit 30 via a shaft 35 that passes through the swing arm unit 30 and one end of the second connecting rod 50 . Both ends of the shaft 35 are locked by screws.

[0050] The surface of the shaft 35 is further covered with two positioning sleeves 36. One side of the positioning sleeve 36 is screwed and stopped on the corresponding surface of the swing arm unit 30. The two positioning sleeves 36 stop one end of the second connecting rod 50 between them to position one end of the second connecting rod 50 and prevent it from sliding improperly on the shaft 35.

[0051] The second connecting rod 50 is movably pivoted to the first connecting rod 40 via a shaft 44 that passes through the first connecting rod 40 and the other end of the second connecting rod 50 . Both ends of the shaft 44 are locked by screws.

[0052] The above is an introduction to the components and their composition of the present invention. Next, the usage characteristics and effects are introduced as follows:

[0053] 5 , 6 , and 7 , when the electric scooter 2 is ridden on a bumpy or uneven road surface or encounters a pothole, the rear wheel 60 is subjected to the impact of the bump and vibration, causing it to swing upward along with the swing arm unit 30. The upward swing of the swing arm unit 30 activates the second link 50, causing the second link 50 to push the first link 40 to swing upward. This, in turn, causes one end of the first link 40 to compress the telescopic shock absorbing unit 20 for a shock-absorbing stroke. Due to the damping effect of the telescopic shock absorbing unit 20, a shock-absorbing force can be generated.

[0054] It is particularly important to emphasize that the swing distance A of one end of the first link 40 automatically corresponds to the swing distance B of the rear wheel connection portion 31 of the swing arm unit 30. In this embodiment, the swing distance A of one end of the first link 40 is equal to the swing distance B of the rear wheel connection portion 31. In other words, through the linkage and interaction between the swing arm unit 30, the second link 50, and the first link 40, the shock absorbing stroke of the telescopic shock absorber unit 20 is longer than conventional ones. The length of the shock absorbing stroke automatically corresponds to the vibration level of the rear wheel 60 in various sliding conditions and on different road surfaces of the scooter 2, achieving a balanced shock absorption force and avoiding excessive hardness or softness. In addition to improving the shock absorption comfort, it also prevents tail swinging and slipping during sliding, improves grip during cornering and side bending, and overall improves the smoothness of control and safety of the scooter 2 on the road.

[0055] In summary, the present invention achieves its intended purpose by providing a device that adjusts the shock-absorbing travel of the telescopic shock-absorbing unit to automatically adjust to the vibration level of the rear wheel in various gliding states and on different road surfaces of the electric scooter, thereby achieving a balanced shock-absorbing and buffering force and avoiding a rear swing arm structure that is too hard or too soft.

[0056] The above description is only a preferred embodiment of the present invention and should not be used to limit the scope of implementation of the present invention; simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the invention description should still fall within the scope covered by the patent of the present invention.

Claims

1. A rear swing arm structure of an electric scooter, comprising a pedal rear side portion, a telescopic shock absorbing unit, two swing arm units, two first connecting rods, and a second connecting rod, characterized in that: The rear side of the pedal is provided with a first set of receiving seats and two second sets of receiving seats; The telescopic shock-absorbing unit has one end movably pivoted to the first set of seats; The swing arm unit, one end of which is movably pivoted to the first position of the second assembly seat, and the other end of which is provided with a rear wheel assembly portion for assembly with a rear wheel; The first connecting rod has one end movably pivoted to the other end of the telescopic shock absorbing unit, and the other end of the first connecting rod is movably pivoted to the second position of the second assembly seat; One end of the second connecting rod is movably pivoted to the swing arm unit, and the other end of the second connecting rod is movably pivoted to the first connecting rod.

2. The rear swing arm structure of the electric scooter according to claim 1, characterized in that: The telescopic shock-absorbing unit is movably pivoted to the first assembly seat through a shaft rod penetrating the first assembly seat and one end of the telescopic shock-absorbing unit, and the two ends of the shaft rod are locked by screws.

3. The rear swing arm structure of the electric scooter according to claim 1, characterized in that: The swing arm unit is movably pivoted to the first position of the second assembly seat by a shaft rod penetrating the first position of the second assembly seat and one end of the swing arm unit. The two ends of the shaft rod are locked by two locking covers and screws.

4. The rear swing arm structure of the electric scooter according to claim 3, characterized in that: The surface of the shaft rod is further sleeved with a shaft sleeve, and the two side end surfaces of the shaft sleeve are stopped at the corresponding surfaces of the swing arm unit, so that a space is defined between the swing arm units to avoid interfering with the movements of the telescopic shock absorbing unit, the first connecting rod and the second connecting rod.

5. The rear swing arm structure of the electric scooter according to claim 1, characterized in that: The first connecting rod passes through the telescopic shock absorbing unit and one end of the first connecting rod through an axle rod, and is movably pivoted to the other end of the telescopic shock absorbing unit. The two ends of the axle rod are locked by screws.

6. The rear swing arm structure of the electric scooter according to claim 1, characterized in that: The first connecting rod is movably pivoted to the second position of the second assembly seat by an axle rod passing through the second position of the second assembly seat and the other end of the first connecting rod. The two ends of the axle rod are locked by screws. Two bearings are further arranged at the pivot point of the other end of the first connecting rod.

7. The rear swing arm structure of the electric scooter according to claim 6, characterized in that: The surface of the shaft rod is further sleeved with a shaft sleeve, and the two side end surfaces of the shaft sleeve are stopped at the corresponding surfaces of the first connecting rod, so that a space is defined between the first connecting rods to avoid interfering with the movement of the telescopic shock-absorbing unit.

8. The rear swing arm structure of the electric scooter according to claim 1, characterized in that: The second connecting rod is movably pivoted to the swing arm unit through an axle rod penetrating the swing arm unit and one end of the second connecting rod, and the two ends of the axle rod are locked by screws.

9. The rear swing arm structure of the electric scooter according to claim 8, characterized in that: The surface of the shaft is further sleeved with two positioning sleeves, one side of which is screwed and stopped on the corresponding surface of the swing arm unit, and the space between the two positioning sleeves stops one end of the second connecting rod to position one end of the second connecting rod to prevent it from sliding improperly on the shaft.

10. The rear swing arm structure of the electric scooter according to claim 1, characterized in that: The second connecting rod is movably pivoted to the first connecting rod through an axle rod passing through the first connecting rod and the other end of the second connecting rod. The two ends of the axle rod are locked by screws.

Images