LT7123B - ELECTRIC SHOCK ABSORBER - Google Patents

Abstract

The invention is intended to dampen the vibrations and shocks of the electric scooter suspension, which occur when riding on various road surfaces and over obstacles, thus ensuring a smoother, more comfortable, and safer ride. The main structural elements of the electric scooter shock absorber are the piston, which is divided into two separate elements (2, 4), and a floating washer (3) installed between them, which can move freely along the piston rod (8). The diameters of the drainage holes in the floating washer (3) are smaller than the diameters of the drainage holes in the upper (2) and lower (4) parts of the piston. The shock absorber is designed for use in various micromobility vehicles, particularly electric scooters, with the possibility of installation in both the front and rear suspension of the electric scooter, in horizontal and vertical positions. Due to the specific operation of the piston inside the shock absorber and the floating washer (3), high precision of the movements of the shock absorber piston rod (8) is achieved. The floating washer (3) under inertia results in a reduced flow of hydraulic fluid between the internal chambers of the shock absorber, thus providing electric scooters with the ability to ride more smoothly, comfortably, and safely.

Description

TECHNICAL FIELD

The subject of the invention is a shock absorber for various types of electric scooters, which, due to its specific buffering effect, can dampen vibrations and impacts in vertical and horizontal directions, thus enabling electric scooters to ride smoother, more comfortably and safely. This shock absorber can also be used in other micro-mobile vehicles.

STATE OF THE ART

United Kingdom patent GB2367792A describes a scooter shock absorber mechanism consisting of a rear fork screwed to a base and supporting the rear wheel. A travel-limiting plate is attached under the base, and an elastic element is mounted on the travel-limiting plate. A threaded element, which is attached to the rear fork, contacts the travel-limiting plate and the elastic element with a locking nut screwed onto it. By adjusting the locking nut, the shock absorber properties of the mechanism are changed. The main disadvantage is that the described design is complex and can only be installed in the rear suspension of the scooter. Also, when the described shock absorber mechanism is installed horizontally, vibrations and shocks acting in other directions (for example, vibrations acting in the vertical direction) are not damped.

Chinese patent CN216269728U describes a scooter shock absorber mechanism, which consists of a fork body used in conjunction with a fixed wheel, a structural element that is connected to the main frame part and a guide element that is connected to the fork body. The shock absorber mechanism also includes a buffer element installed in the fork cylinder. The ends of the buffer element are respectively connected to the fork cylinder and the guide element so that during operation, the guide element can move in the axial direction of the fork cylinder when the buffer element is actuated. The main disadvantage is that the described structure is complex and can only be installed in the front suspension of the scooter. Also, only vertical installation of the described shock absorber mechanism is possible.

United States patent US20040124599A1 describes a shock absorber mechanism for an electric scooter, which consists of two shock absorbers mounted between the rear wheel frame and the rear frame of the scooter. Each shock absorber has an adjustment element threadedly attached to a cylinder, which is connected to the rear frame plate by a screw, installed through the internal cavity of the cylinder and a gasket, and a spring is installed around the cylinder. A protective ring and a washer are attached to the lower part of the shock absorber rod, which is installed in the cylinder, thus enabling the ends of the springs to press the adjustment element and the washer, respectively. The main disadvantage is that in the described design, only the spring is used as a shock absorber element, which does not ensure effective suspension operation. Also, the described design can only be installed in the rear suspension of a scooter and only in a two-shock absorber system.

European patent EP1006292A1 describes a shock absorber that can be used in various vehicles, including micro-mobile vehicles. The described shock absorber can be installed both vertically and horizontally. It consists of a cylinder filled with hydraulic fluid, a piston rod and a piston. The latter consists of at least two separate, primary and secondary pistons, which are arranged on the piston rod at a certain distance from each other. At least one piston, depending on its position, creates a modifiable or variable damping force. The piston rod has an internal bore that is arranged so that additional oil flow occurs through it, and also, a power source is connected to the shock absorber to pressurize the hydraulic oil inside the shock absorber chambers. The main disadvantage is that the described design is complex, and its operation when the shock absorber is installed vertically is limited. Since the drainage holes in both pistons are the same size, damping medium and high frequency vibrations in both directions of the shock absorber is problematic.

ESSENCE OF THE INVENTION

The purpose of the invention is an electric scooter shock absorber designed to dampen vibrations and shocks of the suspension of electric scooters that occur when driving on various road surfaces and over obstacles, so that the ride is smoother, more comfortable and safer. It also reduces vibrations that are transmitted to the driver of the electric scooter during driving. It also provides the possibility of using alternative designs and functions related to the previously mentioned shock absorber having two pistons, an additional oil flow function, since such a shock absorber can operate equally in both compression and extension directions. The invention solves the previously mentioned problem and offers an alternative or simplified design.

In known analogous designs of electric scooter shock absorber systems, a spring is usually used as the main vibration damping element, which does not ensure effective damping of vibrations of different spectra. Also, shock absorbers can be installed only in the front and rear suspensions. A shock absorber for electric scooters has been developed, which can be installed in both vertical and horizontal directions. Based on the previously described designs, there is a known problem related to the possibility of clearly separating the functions of the first and second pistons, since the first piston cannot perform the damping function without the influence of the second piston. Another known problem is related to the possibility of using the inner part of the piston rod to mount fastening and positioning elements that can affect the additional oil flow inside the piston rod. The flow of hydraulic fluid between the internal chambers of the shock absorber would become unstable, which would affect the inefficient operation of the shock absorber.

Based on this invention, a scooter shock absorber has been created to reduce undesirable phenomena during its operation. Vibration while driving should be reduced by about 30% compared to an analogous scooter suspension. Vibration while driving should be reduced by about 10% compared to an analogous scooter shock absorber.

The shock absorber is designed for use in various micro-mobile vehicles and especially in electric scooters to absorb vibrations and shocks in vertical and horizontal directions, using a specific buffering action, thus enabling electric scooters to ride smoother, more comfortable and safer. Due to the specific action of the piston and floating washer inside the shock absorber, high precision of the shock absorber rod movements is achieved.

The main advantage of the electric scooter shock absorber is that the shock absorber operates more smoothly in the event of external vibrations in any direction. This is achieved by dividing the piston into two parts and installing a floating washer with smaller drainage holes between them to make the shock absorber operate more smoothly. An additional advantage of the design of the electric scooter shock absorber is that it can be installed in the front and rear suspension, in horizontal and vertical directions, because it works and dampens well in both directions equally, and the flow of hydraulic fluid between the shock absorber chambers is stable.

DESCRIPTION OF DRAWINGS Fig. Electric scooter shock absorber diagram:

1- shock absorber cylinder

- upper part of the piston

- floating washer

- lower part of the piston

- filling connection

- piston mounting nut

- lower welded shock absorber mounting element

- piston rod

- cap

- screws

- spring

- union nut

- upper welded shock absorber mounting element

STRUCTURE AND OPERATING PRINCIPLE

The shock absorber consists of a shock absorber cylinder (1), which is filled with hydraulic fluid. Inside the shock absorber cylinder (1), there is a piston, which consists of two separate parts: the upper piston part (2) and the lower piston part (4). Between the upper piston part (2) and the lower piston part (4) there is a floating washer (3). The piston rod (8) passes through the centers of the upper piston part (2), the lower piston part (4) and the floating washer (3). The upper (2) and lower (4) piston parts, between which there is a floating washer (3), are fixed to the piston rod (8) through their centers, using a piston fixing nut (6). The floating washer (3) moves freely on the piston rod (8) between the upper piston part (2) and the lower piston part (4). To throttle the oil flow, the floating washer (3) has two symmetrical semicircular drainage holes. The diameters of the drainage holes in the floating washer (3) are smaller than the diameters of the drainage holes in the upper piston part (2) and the lower piston part (3), so that the flow of hydraulic fluid can be reduced. A cover (9) is screwed to the shock absorber cylinder (1) with screws (10), through which the piston rod (8) passes. A union nut (12) is screwed onto the top of the piston rod (8). A spring (11) is installed on the piston rod (8) between the screwed cover (9) and the union nut (12). The shock absorber cylinder (1) has an additional connection (5) for filling the shock absorber with hydraulic fluid. In addition, a lower mounting element (7) is welded to the shock absorber cylinder (1), and an upper mounting element (13) is welded to the connecting nut (12). Using the lower and upper mounting elements, the shock absorber is installed in the suspension of the electric scooter.

The shock absorber dampens vibrations and shocks in the suspension of electric scooters due to the specific movement of the free-floating washer (3) between the upper piston part (2) and the lower piston part (3) during inertia, reducing the flow of hydraulic fluid between the shock absorber chambers, thus enabling electric scooters to ride smoother, more comfortably and safely.

Claims (4)

1. A shock absorber for various types of electric scooters, comprising a cylinder, inside of which is a piston consisting of upper and lower parts with a piston rod, also comprising a spring, characterized in that a floating washer is installed between the upper and lower parts of the piston. 2. The shock absorber according to claim 1, characterized in that a floating washer installed between the upper and lower parts of the piston moves freely along the piston rod. 3. The shock absorber according to claim 1, characterized in that the diameters of the drainage holes in the floating washer are smaller than the diameters of the drainage holes in the upper and lower parts of the piston, therefore, due to the inertia of the floating washer, a smaller flow of hydraulic fluid is achieved in the shock absorber cylinder. 4. The shock absorber according to claims 1-3 is characterized in that it is mounted in both the front and rear suspension of the electric scooter, in horizontal and vertical positions.