Damping device of electric scooter

Abstract

The utility model relates to the technical field of electric scooters, in particular to a damping device of an electric scooter, which comprises a rear suspension used for supporting wheels and a rear damper arranged on one side of the rear suspension. The rear suspension comprises a suspension lifting lug fixedly connected with the lower vehicle body framework and a rear swing arm rotationally connected with the suspension lifting lug through a swing arm rotating shaft, one side of the rear swing arm is fixedly connected with the wheel motor mounting frame, and the bottom of the rear swing arm is rotationally connected with one end of the rear shock absorber. The connecting point between the rear swing arm and the wheel motor mounting frame, the connecting point between the rear swing arm and the rear shock absorber and the swing arm rotating shaft form a triangle, and therefore vertical vibration of the wheel motor mounting frame in the longitudinal direction is converted into axial movement of an elastic buffering component in the rear shock absorber through the rear swing arm.

Description

[0001] Priority Application

[0002] This application claims priority to Chinese Invention Patent Application No. 2024102722909, filed on March 8, 2024, entitled “

Invention Name: An Electric Scooter and Its Folding Mechanism, Shock Absorbing Device, and Sensing System

[0003] The utility model relates to electric wheelchair technical field, concretely is a shock absorbing device of electric scooter. BACKGROUND

[0004] Electric wheelchairs and electric scooters are intelligent travel tools designed specifically for people with limited mobility. They help users achieve independent movement through electric power, significantly improving the convenience of life and social participation. These devices mainly serve people with difficulty walking, taking into account medical rehabilitation and daily mobility needs.

[0005] In order to make the electric scooter more stable during driving, and thus provide a more comfortable feeling for the user, a shock absorbing mechanism is generally installed at the rear wheel position of the electric wheelchair. Most of the current rear wheel shock absorbing structures are single iron plates fixedly connected with the driving motor, and the overall weight increases after the motor is movably connected with the wheel. During driving and sitting or lying, a large gravitational force is generated, the single iron plate has poor bearing capacity and low stability, thereby causing low use safety. Therefore, various rear wheel shock absorbing devices for electric wheelchairs have been proposed in the prior art.

[0006] For example, the invention patent application with publication number CN114514009A discloses an electric mobile device. The electric mobile device has at least a pair of front wheels, a vehicle body frame supported by the pair of front wheels, and a seat unit supported by the vehicle body frame. The vehicle body frame has a pair of side beams arranged in the vehicle width direction, each front wheel is supported on the front end side of the side beam via a front wheel suspension, the front wheel suspension has an arch-shaped beam arranged on the front end side of the side beam and curved upward in a convex shape, a swing member supported on the front end side of the arch-shaped beam in a manner that can swing in the up-down direction, and a front spring that applies force to the swing member relative to the arch-shaped beam toward the lower side, and a vehicle axle supported by the swing member. The above-mentioned scheme buffers by arranging a spring in the vertical direction, thereby absorbing up-down vibration and ensuring stability during driving.

[0007] For example, the Chinese utility model patent with the publication number CN219423175U discloses a novel wheelchair rear wheel damping device, which comprises a frame body, a damping mechanism and a wheel body, the rear side of the frame body is provided with an extension part, the extension part is arranged at a certain angle with the rear side vertical rod of the frame body, a triangular mounting mechanism is arranged in the angle, the first corner of the triangular mounting mechanism is connected to the frame body at one place through the damping mechanism, the second corner of the triangular mounting mechanism is arranged at one place of the frame body, the third corner of the triangular mounting mechanism is connected to the extension part at one place through a limiting mechanism, and one place of the triangular mounting mechanism is connected with the wheel body through a motor assembly.

[0008] However, the damping devices mentioned above are all arranged on the outer side of the wheel, thereby increasing the overall width of the electric scooter, and when the electric scooter drives to some places with poor passability, for example, many obstacles or very narrow roads, the externally mounted damping device is easy to be collided, thereby affecting the damping effect and service life of the damping device.

[0009] Therefore, the damping device is proposed. Content of the utility model

[0010] The damping device of the electric scooter partially solves or alleviates the above technical problems by mounting the rear shock absorber in front of the rear wheel through a new suspension, thereby reducing the overall width of the electric scooter and improving the passability of the electric scooter to a certain extent.

[0011] In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions:

[0012] A damping device of an electric scooter, comprising: a rear suspension for supporting a wheel, and a rear shock absorber arranged on one side of a lower vehicle body framework of the electric scooter and located in front of the rear suspension, the axial direction of the rear shock absorber is parallel to the length direction of the lower vehicle body framework; wherein the rear suspension comprises:

[0013] A wheel motor mounting rack mounted on the rear wheel of the electric scooter;

[0014] A suspension lifting lug fixedly connected with the lower vehicle body framework, the suspension lifting lug comprises a lifting lug base fixedly mounted on the lower vehicle body framework, and a lifting lug body arranged in an L shape on the top of the lifting lug base;

[0015] A rear swing arm rotatably connected to one end of the lifting lug body away from the lower vehicle body framework through a swing arm rotating shaft, one side of the rear swing arm (i.e. the side away from the suspension lifting lug) is fixedly connected with the wheel motor mounting rack, and the bottom of the rear swing arm is rotatably connected with one end of the rear shock absorber close to the rear wheel,

[0016] The connecting point between the rear swing arm and the wheel motor mounting bracket, the connecting point between the rear swing arm and the rear shock absorber, and the swing arm rotation shaft form a triangle, so that the up and down vibration of the wheel motor mounting bracket in the longitudinal direction is converted into the axial movement of the elastic buffering component in the rear shock absorber through the rear swing arm. Preferably, the rear swing arm adopts a triangular structure, one of the vertices of which is the connecting point between the rear swing arm and the rear shock absorber, and the other two vertices are respectively the connecting point between the rear swing arm and the wheel motor mounting bracket and the mounting point of the swing arm rotation shaft. Preferably, the rear swing arm adopts a right-angled triangle, and the hypotenuse side is close to the rear wheel, and the vertex between the two right-angled sides is mounted with the swing arm rotation shaft.

[0017] Preferably, the axial direction of the elastic buffering component is parallel to the horizontal direction.

[0018] Preferably, the lug body comprises a first body and a second body connected vertically, wherein one end of the first body away from the second body is fixedly connected with the top of the lug base, and the second body extends from the end of the first body away from the lug base in a direction perpendicular to the axial direction of the first body and close to the lower vehicle body frame, so that an installation space for mounting the rear swing arm is formed between the inner side of the second body, the inner side of the first body and the outer side of the lug base.

[0019] Preferably, the rear shock absorber comprises a shock absorber spring as the elastic buffering component, a shock absorber inner shaft and a shock absorber outer shaft base, the shock absorber outer shaft base is arranged on the shock absorber inner shaft in a slidable manner, wherein one end of the shock absorber inner shaft is rotationally connected to the lower vehicle body frame, and the other end is rotationally connected to the rear swing arm.

[0020] The shock absorber spring is sleeved on the shock absorber inner shaft, and one end of the shock absorber spring abuts against a first base body at one end of the shock absorber outer shaft base, and the other end abuts against a second base body at the other end of the shock absorber outer shaft base.

[0021] Preferably, the first base body and the second base body are connected together by a shock absorber outer shaft pull rod.

[0022] Preferably, the shock absorbing device of the electric scooter further comprises a shock absorber front mounting seat fixed on the lower vehicle body frame, and the shock absorber front mounting seat is rotationally connected to one end of the shock absorber inner shaft away from the rear wheel through a shock absorber inner shaft connecting point.

[0023] Preferably, the axial direction of the shock absorber inner shaft connecting point is perpendicular to the axial direction of the shock absorber inner shaft.

[0024] Preferably, one end of the shock absorber inner shaft penetrates through the back of the first base body and is rotationally connected with the front mounting seat of the shock absorber; the other end is fixedly connected with a shock absorber inner shaft base, and the shock absorber inner shaft base is slidingly connected with the second base body through a first connecting rod.

[0025] Preferably, the other end of the shock absorber spring abuts against the shock absorber inner shaft base.

[0026] Preferably, the side of the second base body away from the shock absorber inner shaft is rotationally connected with the rear swing arm at a shock absorber outer shaft connecting point through a second connecting rod.

[0027] Beneficial effects:

[0028] 1. The utility model discloses a new suspension is designed to install the shock absorber in the front of rear wheel, not only make the width of electric scooter whole reduces, and further improve the passability of electric scooter.

[0029] 2. The utility model discloses a seat pillar is arranged, the pillar motor (i. e. driving mechanism) of folding mechanism in the seat pillar is driven to extend and shorten the upper support rod of pillar motor, the lower support rod of pillar motor, thereby driving the rear section of four connecting rod mechanism relative to the lower vehicle body skeleton, the pillar base rotates, and the pillar top connecting piece and the front section of pillar are driven by the rear section of pillar, and the folding seat moves more stably along the vertical direction and horizontal direction under the action of the four connecting rod structure, and the adjustment of seat position is realized. Compared with two connecting rod or three connecting rod mechanism, the stability and safety of the lifting device are better, and in order to adapt to the adjustment of different sitting postures in different application scenes, the four connecting rod mechanism is not adopted parallelogram structure, wherein the length of the front section of pillar is greater than the length of the rear section of pillar, so that the four connecting rod mechanism forms an irregular trapezoid, for example, the length of the edge between the fourth rotation shaft O4 and the third rotation shaft O3 is less than the length of the edge between the first rotation shaft O1 and the second rotation shaft O2, and the length of the edge between the first rotation shaft O1 and the fourth rotation shaft O4 is less than the length of the edge between the second rotation shaft O2 or the third rotation shaft O3, as shown in the figure, the design makes the axial direction of the seat cushion and the ground form a certain angle (for example, 15°-25°) when the seat cushion rises to the highest position, and the user's back is close to the backrest when sitting, and the comfort and safety are better, and when the seat cushion reaches the lowest position, the axial direction of the seat cushion is almost parallel to the ground, and the bottom of the seat cushion just abuts against the wheel (as shown in the figure), which makes the volume smaller and is convenient to store. Figure 5a Figure 3 Further, the front section of pillar and the rear section of pillar can move towards each other, so that when the seat cushion is at the highest position, the distance between the two is maximum, and when the seat cushion is at the lowest position, the distance between the two is minimum, further reducing the volume and facilitating storage. ​

[0030] 3. The electric scooter of the utility model is further provided with a sensing system, indicator lights and a screen system, so that the sound and light system can prompt during the walking process, and higher safety is achieved.

[0031] 4. The electric scooter of the utility model is further equipped with a sensing system, such as a laser radar, an ultrasonic radar and a TOF ranging sensor, which can provide automatic driving assistance in obstacle avoidance, narrow road and ramp scenarios when the driver uses it, and higher intelligence is achieved. The existing electric scooter is mostly provided with a central controller for automatic driving, therefore, the sensing system can provide reliable data for automatic driving, so as to avoid obstacles or plan a path. Specifically, the utility model is provided with ultrasonic radars and laser radars with different detection ranges and detection angles at the front end of the lower vehicle body, so that the accuracy is ensured without greatly increasing the cost of the electric scooter. For example, two ultrasonic radars are symmetrically arranged on the front side of the pedal at the front end of the lower vehicle body to realize the detection of the front short distance, and one ultrasonic radar is arranged on each side of the pedal to realize the detection of the left front and right front short distances, so that the front detection, the left front and right front detection and the detection of the vicinity of the front wheel are realized, that is, multi-directional detection is realized. For another example, since the ultrasonic radar is easily disturbed by noise and its accuracy decreases when the distance increases, a laser radar capable of detecting within a 360° range is arranged to realize multi-directional detection together with the ultrasonic radars. Furthermore, a distance sensor is arranged on the handrail to realize long-distance detection. For the rear end of the scooter, corresponding ultrasonic radars are arranged at different heights for the rear wheels and the anti-toppling mechanism, so as to avoid the blind area during reversing and ensure the safety during reversing. That is, through the combination of the ultrasonic radars, the laser radars and the distance sensor, a sensing system with controllable cost, capable of detecting different distances and multi-directionally is realized, and compared with the way of arranging a certain detection component alone, the reliability is higher, and compared with the way of using laser radars as detection components, the cost is lower.

[0032] 5. The utility model discloses a anti-toppling mechanism is set up, when the lower vehicle body is inclined, the lower vehicle body is inclined with ground, at this moment trigger gyro wheel continues to move down under the action of trigger spring, makes trigger spring drive trapezoidal block to move down, at this moment trapezoidal block no longer joint guide plate, makes guide plate pop -up under the action of compression spring, makes guide plate drive anti-toppling gyro wheel to stretch and ground and resist, makes the inclined lower vehicle body have a support point with ground, has played the effect of preventing to fall down, has improved the stability of electric scooter under the inclined state, avoided the security risk that causes because falls down. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. In all the drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, the elements or parts are not necessarily drawn according to the actual proportion. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0034] Figure 1 It is a front side structure schematic view of an embodiment of the electric scooter of the present application.

[0035] Figure 2 It is a rear side structure schematic view of an embodiment of the electric scooter of the present application.

[0036] Figure 3 It is a schematic view of folding and unfolding of the foldable seat in an embodiment of the electric scooter of the present application.

[0037] Figure 4 It is a schematic view of reflecting Figure 1 The structure schematic view of the seat support column on the lower vehicle body.

[0038] Figure 5a It is a schematic view of reflecting the folding mechanism of the seat support column of the electric scooter of the present application.

[0039] Figure 5b It is a schematic view of reflecting the folding mechanism when the foldable seat of the electric scooter of the present application is in the highest position.

[0040] Figure 5c It is a schematic view of reflecting the folding mechanism when the foldable seat of the electric scooter of the present application is in the lowest position.

[0041] Figure 6 It is a schematic view of reflecting the cooperation between the front section of the support column and the rear section of the support column when the foldable seat of the electric scooter of the present application is in the highest position.

[0042] Figure 7 It is a schematic view of reflecting the cooperation between the front section of the support column and the rear section of the support column when the foldable seat of the electric scooter of the present application is in the lowest position.

[0043] Figure 8 It is a structure schematic view of the rear shock absorber in the electric scooter of the present application.

[0044] Figure 9 It is a structure schematic view of the rear shock absorber in the electric scooter of the present application from another perspective.

[0045] Figure 10 It is the structure schematic view of the anti-toppling mechanism in the electric scooter of the utility model;

[0046] Figure 11 It is Figure 10 The enlarged structure schematic view of A in the middle.

[0047] In the figure: 1, lower vehicle body; 100, cushion; 101, lower vehicle body framework; 2, front wheel; 3, rear wheel; 303, rear wheel motor; 6, backrest; 7, headrest; 8, armrest; 9, control handle; 10, distance sensor; 11, mobile phone support; 12, armrest rotating shaft; 13, laser radar; 14, ultrasonic radar; 15, rear camera; 16, rear indicator light; 17, rear display; 19, battery; 20, seat adjustment button; 21, pedal; 22, front damping device; 23, anti-collision groove;

[0048] 4, seat support column; 103, support column front section support bracket; 1041, lug base; 1042a, first body; 1042b, second body; 105, seat support column base; 1051, first fixed plate; 1052, second fixed plate; 1053, third fixed plate; 106, support column rear section support bracket; 401, support column rear section; 402, support column front section; 401a, first feature (such as arc-shaped first side wing); 402a, second feature (such as arc-shaped second side wing); 403, support column top connecting piece; 404, support column motor; 405, support column motor upper support rod; 406, support column motor lower support rod; 407, support column motor upper support point; 102, support column motor lower support point; 410, support column rear section lower connecting point; 412, support column front section upper connecting point; 423, support column front section lower connecting point;

[0049] 5, damping device; 501, rear swing arm; 502, rear shock absorber; 503a, first base body (or shock absorber outer shaft base I); 503c, second base body (or shock absorber outer shaft base II); 503b, shock absorber outer shaft pull rod; 503d, shock absorber outer shaft connecting point; 504, shock absorber spring; 505, shock absorber inner shaft; 505a shock absorber inner shaft base; 506, swing arm rotating shaft; 507, first connecting rod; 508, second connecting rod;

[0050] 18, anti-toppling mechanism; 181, compression spring; 182, guide plate; 107, shock absorber front mounting base; 304, wheel motor mounting rack; 183, anti-toppling roller; 184, trigger spring; 185, trapezoidal block; 186, vertical rod; 187, trigger roller. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are 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 of ordinary skill in the art without creative labor fall within the scope of the present application.

[0052] In this document, the suffixes such as "module", "part", or "unit" used for an element are merely intended for facilitating the description of the present application, and are not intended to have a specific meaning or function. Therefore, "module", "part", or "unit" can be mixedly used.

[0053] In this document, the terms "upper", "lower", "inner", "outer", "front", "back", "one end", "the other end", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0054] In this document, unless otherwise explicitly specified and limited, the terms "mount", "provided with", "connected", and the like should be understood broadly, for example, "connected" can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be directly connected, can be indirectly connected through an intermediate medium, or can be connected inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] In this document, "and / or" includes any and all combinations of one or more listed related items.

[0056] In this document, "a plurality of" means two or more, that is, it includes two, three, four, five, etc.

[0057] Embodiment 1: see Figure 1 is a structural schematic view of an electric scooter according to an exemplary embodiment of the present application, specifically, the electric scooter comprises: a lower vehicle body 1, a foldable seat connected to the lower vehicle body 1 through a seat column (i.e. Figure 1 A folding mechanism is arranged in the seat column. The front and rear ends of the left and right sides of the lower vehicle body 1 are respectively provided with front wheels 2 and rear wheels 3, and a damping device 5 is arranged near the rear wheels 3 through a suspension.

[0058] In some embodiments, the folding mechanism adopts a four-bar linkage mechanism, which is more stable and safer than two-bar or three-bar linkage mechanisms; and in order to adapt to different sitting postures in different application scenarios (for example, when walking, the axis of the seat cushion (i.e., the seat cushion 100) is above the horizontal line and has a certain angle with the horizontal line; and when entering under a table, the axis of the seat cushion is parallel to the horizontal line), the four-bar linkage mechanism is not in a parallelogram structure.

[0059] Referring to Figure 4 The four-bar linkage mechanism includes: a first link (such as the front section of the support 402) arranged between the first rotation shaft O1 and the second rotation shaft O2, a second link (such as the seat support base 105) between the second rotation shaft O2 and the third rotation shaft O3, a third link (such as the rear section of the support 401) between the third rotation shaft O3 and the fourth rotation shaft O4, and a fourth link (such as the top support connector 403) between the fourth rotation shaft O4 and the first rotation shaft O1. The folding mechanism further includes a driving mechanism, such as a motor, for driving the four-bar linkage mechanism to rotate with the side between the second rotation shaft O2 and the third rotation shaft O3 as a fixed side. One end of the driving mechanism is fixed on the lower vehicle body framework (such as the lower vehicle body framework 101), and the free end of the support rod (such as the upper support rod 405 of the support motor) is rotatably connected to the third link through the sixth rotation shaft O6.

[0060] Referring to Figures 4 to 8 In some embodiments, the seat support 4 includes: a rear section of the support 401, a front section of the support 402, a top support connector 403, and a support motor 404. The front support 402 and the rear support 401 are connected together by the top support connector 403 through a connecting member such as a bolt, and can rotate in the axial direction thereof.

[0061] Referring to FIG. 5b and Figure 5c The seat support base 105 is fixedly connected to the lower vehicle body framework 101, and the front section support bracket 103 and the rear section support bracket 106 are fixedly connected thereto. The rear section of the support 401 and the front section of the support 402 are bolted together through the lower connection point 423 of the front section of the support and the lower connection point 410 of the rear section of the support, and can also rotate in the axial direction of the bolt. In this way, the rear section of the support 401, the front section of the support 402, the top support connector 403, and the seat support base 105 form a four-bar linkage structure. The lower end of the support motor 404 is connected to the lower vehicle body framework 101 through the lower support point 102 of the support motor, and the upper support rod 405 of the support motor is connected to the rear section of the support 401 through the upper support point 407 of the support motor. The upper support rod 405 of the support motor can slide in the axial direction of the inner diameter of the lower support rod 406 of the support motor.

[0062] Further, the rear section of the support 401 has a curved first feature 401a (such as Figure 7and Figure 8 The seat pillar 4 is composed of a front section 402 and a rear section 401, and the front section 402 is provided with a first feature 401a (such as an arc-shaped first side wing) and the rear section 401 is provided with a second feature 402a (such as an arc-shaped second side wing), and the first feature 401a and the second feature 402a have a certain overlap in the front-rear direction and a certain gap in the left-right direction. In this way, the seat pillar 4 can be visually regarded as a single column, and at the same time, the front section 402 and the rear section 401 have relative movement in the front-rear direction when the column is adjusted in height. Figure 6 and Figure 7 When the seat pillar 4 is lowered to the lowest position of the seat (as shown in the position of FIG. 8), the distance between the front section 402 and the rear section 401 of the seat pillar is the smallest, and the second feature 402a is completely accommodated in the first feature 401a, and at this moment, it is still visually regarded as a single column, and compared with the traditional four-bar linkage structure, it is more simple in appearance. In addition, the design allows the two to partially overlap, which not only reduces the volume of the column when folded, but also creates more folding space for the seat. If the front section 402 and the rear section 401 are integrated, the structure shown in FIG. 9 is maintained after folding, which leads to limited folding space and the seat cannot be folded to the position shown in FIG. 10. Figure 3 、 Figure 5c and Figure 7 When the seat pillar 4 is lowered to the lowest position of the seat (as shown in the position of FIG. 8), the distance between the front section 402 and the rear section 401 of the seat pillar is the smallest, and the second feature 402a is completely accommodated in the first feature 401a, and at this moment, it is still visually regarded as a single column, and compared with the traditional four-bar linkage structure, it is more simple in appearance. In addition, the design allows the two to partially overlap, which not only reduces the volume of the column when folded, but also creates more folding space for the seat. If the front section 402 and the rear section 401 are integrated, the structure shown in FIG. 9 is maintained after folding, which leads to limited folding space and the seat cannot be folded to the position shown in FIG. 10. Figure 5c 、 Figure 6 、 Figure 5c 、

[0063] Referring to FIG. 11 and FIG. 12, the rear wheel 3 is provided with a rear suspension, which includes a suspension hanger, a rear swing arm 501, a rear shock absorber 502, and a shock absorber front mounting seat 107. The rear swing arm 501 is connected with the rear wheel motor 303, the suspension hanger is fixedly connected to the lower vehicle body frame 101, the rear swing arm 501 is connected with the suspension hanger through a swing arm rotating shaft 506 and can rotate along the axis. The shock absorber front mounting seat 107 is fixed to the lower vehicle body frame 101. Figure 8 Figure 9 In some embodiments, the lower end of the swing arm 501 is connected with the rear shock absorber 502 through a bolt or other connecting member and a shock absorber outer shaft connecting point 503d, and can rotate along the axial direction of the bolt. The other end of the rear shock absorber 502 is connected to the shock absorber front mounting seat 107 in the same way through a shock absorber inner shaft connecting point 108.

[0064] When the vehicle is running, the up-and-down jumping of the rear wheel 3 will drive the rear wheel motor 303 to jump longitudinally, and the up-and-down jumping of the former will be converted into the front-and-back movement of the shock absorber outer shaft connecting point 503d through the swing arm rotating shaft 506, thereby driving the rear shock absorber 502 to work.

[0065] When the vehicle is running, the up-and-down jumping of the rear wheel 3 will drive the rear wheel motor 303 to jump longitudinally, and the up-and-down jumping of the former will be converted into the front-and-back movement of the shock absorber outer shaft connecting point 503d through the swing arm rotating shaft 506, thereby driving the rear shock absorber 502 to work.

[0066] ​Different from the prior art, the rear shock absorber 502 is a special type of anti-pull shock absorber. The shock absorber spring 504 is sleeved on the shock absorber inner shaft 505, one end of the shock absorber spring 504 is supported on the shock absorber outer shaft base I (i.e. the first base body 503a in the subsequent embodiment), and the other end of the shock absorber spring 504 is supported on the shock absorber outer shaft base II (i.e. the second base body 503c in the subsequent embodiment). The shock absorber outer shaft base I 503a and the shock absorber outer shaft base II 503c are fixedly connected together through the shock absorber outer shaft pull rod 503b, and the shock absorber outer shaft base II 503c is fixedly connected to the shock absorber inner shaft 505.

[0067] When the rear wheel 3 jumps upward, the shock absorber outer shaft connecting point 503d moves in the direction of the tail of the vehicle, and the shock absorber outer shaft base I (i.e. the first base body 503a), the shock absorber outer shaft pull rod 503b, and the shock absorber outer shaft base II (i.e. the second base body 503c) also move in the direction of the tail of the vehicle. At this moment, the shock absorber inner shaft 505 is connected to the shock absorber front mounting seat 107 through the shock absorber inner shaft connecting point 108 and does not move relatively. Therefore, at this moment, the spring 504 is driven to move backward and is compressed. Different from the conventional shock absorber, the distance between the shock absorber inner shaft connecting point 108 and the shock absorber outer shaft connecting point 503d increases, and the spring is compressed. Therefore, in terms of service life, this design makes the service life of the spring longer.

[0068] If a conventional compression type shock absorber is used, the length of the installation structure of the rear wheel motor can be lengthened. However, this way will increase the volume or size of the entire device. Therefore, from the perspective of space optimization, without changing the installation point of the rear wheel motor, an anti-pull type shock absorber is used, and the up and down movement of the rear wheel motor is converted into the front and back movement of the anti-pull shock absorber through the rear swing arm. Preferably, the rear shock absorber is in the same straight line as the wheel motor (i.e. considering that the shock absorber is installed in front of or behind the wheel), and therefore, when the suspension is set, the position of the wheel motor needs to be considered, so as to design the corresponding swing arm structure and select the shock absorber to fully utilize the structural space, thereby not increasing the overall size of the device (especially the length direction).

[0069] Embodiment 2: The height and position of the seat of a conventional wheelchair or electric scooter are fixed and cannot be adjusted. However, in daily life, people need to move to different application scenarios and need to adapt to different heights. For example, when a user is at a table in a coffee shop or a bookstore, some tables are relatively high, or some tables are relatively low. If the height of the seat cannot be adjusted, the user will feel uncomfortable. In addition, a user will inevitably be tired in a sitting position for a long time, which is not conducive to the health of the user's lumbar vertebrae and other body parts. Therefore, the need to adjust the seat is increasing. Therefore, various adjustable seat scooters have been proposed in the prior art.

[0070] For example, the Chinese patent application CN201347010Y discloses a seat lifting and rotating device which can conveniently adjust rotation, lifting and prevent the seat from being separated from the pipe. The device comprises a receiving seat, a lifting adjusting assembly, a rotating adjusting assembly, a limiting assembly and a receiving pipe. The receiving seat is arranged on the upper end of the seat of the electric scooter. The receiving pipe is arranged on the body of the electric scooter. The lifting adjusting assembly is combined with the limiting assembly to be arranged in the receiving pipe. When in use, the user presses one end of the press handle to press the control valve of the air pressure rod through the other end of the press handle, so that the piston rod of the air pressure rod is pulled up or pressed down by external force to be extended or retracted, so that the body of the air pressure rod and the receiving seat are lifted. However, the lifting and rotating device can only adjust the height of the seat in the vertical direction. When the user and the target such as a table have a height difference and a certain horizontal displacement difference, the height is adjusted by the above lifting structure, and then the electric scooter needs to be controlled to continue moving forward. However, if the horizontal displacement difference is small, it is difficult to adjust the distance to the appropriate distance by controlling the movement of the wheels of the electric scooter. That is, this method needs to be adjusted twice, and the horizontal position is difficult to control. Therefore, the utility model provides a new electric scooter.

[0071] Please refer to Figure 1 Figure 8 As shown in the figure, the utility model provides an electric scooter, which comprises a lower body 1, which is externally provided with a protective shell to protect the internal structure. The lower body 1 is provided with front wheels 2 and rear wheels 3. The front wheels 2 and the rear wheels 3 are provided with motors for driving (preferably, the motor is a brushless direct current motor to improve energy efficiency). The front wheels 2 and the rear wheels 3 are made of wear-resistant rubber material to improve the service life. The lower body 1 is connected with a foldable seat through a seat support 4.

[0072] In some embodiments, referring to Figure 1 The foldable seat comprises a seat cushion 100 mounted on the top of the seat support 4, a backrest 6 rotatably connected to the rear end of the seat cushion 100, a headrest 7 arranged on the backrest 6, and an armrest 8 arranged on the backrest 6 and rotatably connected to the two sides of the backrest 6 through an armrest rotating shaft 12.

[0073] In some embodiments, referring to Figure 4 The lower body 1 is provided with a lower body framework 101. Preferably, the lower body framework 101 is made of lightweight aluminum alloy material to reduce the overall weight.

[0074] ​In this embodiment, the lower car body framework 101 is fixedly connected with a seat support 4, and the top of the seat support 4 is fixedly connected with a seat cushion 100. The seat support 4 comprises a foldable mechanism and a driving mechanism for driving the foldable mechanism to fold, i.e., the foldable mechanism is driven by the driving mechanism to fold, thereby realizing seat adjustment (including height adjustment and slight displacement in the horizontal direction, and even including the included angle between the seat cushion 100 and the plane M where the lower car body framework 101 is located). Specifically, the foldable mechanism comprises:

[0075] A support base 105 (i.e., the second link of the four-bar linkage) is fixedly connected to the lower car body framework 101, one end of a support front section 402 (i.e., the first link of the four-bar linkage) is hingedly connected to the support base 105, the other end of the support front section 402 is hingedly connected with a support top connecting piece 403 (i.e., the fourth link of the four-bar linkage), the support top connecting piece 403 is hingedly connected with the support front section 402 through a support front section upper connecting point 412 (i.e., the first rotation shaft O1 is arranged at the support front section upper connecting point 412), one end of the support top connecting piece 403 away from the support front section 402 is hingedly connected with a support rear section 401 (i.e., the third link of the four-bar linkage, for example, the two are hingedly connected through a support rear section lower connecting point 411 arranged on the support rear section 401, i.e., the fourth rotation shaft O4 is arranged at the support rear section lower connecting point 411), the bottom of the support rear section 401 is hingedly connected with the support base 105, and the output end of a support motor 404 (i.e., the driving mechanism) is hingedly connected to the support rear section 401, and the other end of the support motor 404 is hingedly connected to the lower car body framework 101.

[0076] Preferably, referring to Figure 5b and Figure 5c the support motor 404 is hingedly connected to the lower car body framework 101 through a support motor lower supporting point 102 (i.e., the fifth rotation shaft O5 is arranged at the support motor lower supporting point 102) at the bottom of the support motor 404.

[0077] Preferably, referring to Figure 5a and Figure 5b both ends of the support base 105 are fixedly connected with a support front section supporting bracket 103 and a support rear section supporting bracket 106, respectively, wherein the support front section supporting bracket 103 is provided with a support front section lower connecting point 423 (i.e., the second rotation shaft O2 is arranged at the support front section lower connecting point 423), and the support rear section supporting bracket 106 is provided with a support rear section lower connecting point 410 (i.e., the third rotation shaft O3 is arranged at the support rear section lower connecting point 410), so that one end of the support front section 402 is hingedly connected with the support base 105 through the support front section lower connecting point 423, and one end of the support rear section 401 is hingedly connected with the support base 105 through the support rear section lower connecting point 410.

[0078] Preferably, referring to Figure 5aand Figure 5b The support base 105 includes a first fixing plate 1051, and a second fixing plate 1052 and a third fixing plate 1053 respectively disposed on both sides of the first fixing plate 1051 and arranged parallel to each other. Preferably, the height direction of the first fixing plate 1051 forms an acute angle with the plane M where the lower vehicle frame 101 is located (that is, the first fixing plate 1051 is not perpendicular to the plane M where the lower vehicle frame 101 is located, but is oriented towards the parking space). Figure 5b (In the Y-axis direction) tilted backward), the second fixing plate 1052 is located at the bottom of one side of the first fixing plate 1051 and is fixed to the lower body frame 101; the third fixing plate 1053 is located at the top of the other side of the first fixing plate 1051 and is fixed to the lower body frame 101, so that the second fixing plate 1052 and the third fixing plate 1053 are located on planes at different heights, thereby creating a certain height difference between the second rotating shaft O2 and the third rotating shaft O3 (e.g., in the Y-axis direction) tilted backward, the second fixing plate 1052 is located at the bottom of one side of the first fixing plate 1051 and is fixed to the lower body frame 101, so that the second fixing plate 1052 and the third fixing plate 1053 are located on planes at different heights, thereby creating a certain height difference between the second rotating shaft O2 and the third rotating shaft O3 (e.g., in the Y-axis direction) tilted backward, the second fixing plate 1052 is located at the bottom of one side of the first fixing plate 1051 and is fixed to the lower body frame 101; the third fixing plate 1053 is located at the top of the other ... Figure 5b As shown by the dashed line, or as... Figure 5a (As shown).

[0079] like Figure 5a and Figure 5b Preferably, the height of the second pivot O2 relative to the plane of the lower body frame 101 is less than the height of the third pivot O3 relative to the plane of the lower body frame 101. Since both the second pivot O2 and the third pivot O3 are mounted on the lower body frame 101, their heights remain fixed regardless of how the seat is folded. Correspondingly, the height difference between them is also fixed, meaning the support base 105 between them serves as a fixed side. As the drive mechanism drives the rear section 401 of the support pillar to rotate around the third pivot O3, the quadrilateral formed by the four-bar linkage deforms.

[0080] For example, such as Figure 5a and Figure 5b In the initial state (i.e., when the seat is raised to its highest position), the height of the first pivot O1 relative to the plane of the lower body frame 101 is greater than the height of the fourth pivot O4 relative to the plane of the lower body frame 101, thus causing the seat cushion 100 to tilt appropriately towards the inside of the backrest 6 (i.e., the axial direction of the seat cushion 100 has a certain angle with the horizontal plane, such as...). Figure 3 As shown), when the user sits on the cushion 100, the user's back is more closely aligned with the backrest 6, ensuring the stability, comfort, and sense of security of the user's sitting posture; as Figure 5c When the seat is in its lowest position, the height of the first pivot O1 relative to the plane of the lower body frame 101 is slightly less than the height of the fourth pivot O4 relative to the plane of the lower body frame 101, making the axial direction of the seat cushion 100 almost parallel to the horizontal plane. Figure 3 As shown; while the height difference between the second rotating shaft O2 and the third rotating shaft O3 remains unchanged.

[0081] In some embodiments, referring to Figure 5b In this embodiment, the strut motor 404 includes a strut motor upper support rod 405 and a strut motor lower support rod 406, which are output ends of the strut motor 404 for driving the telescoping. The strut rear section 401 is hinged to the output ends of the strut motor 404 via a strut motor upper support point 407 (i.e., a hinged point, at which a sixth rotation shaft O6 is arranged, see Figure 5a ; preferably, the strut motor upper support point 407 between the output ends and the strut rear section 401 is close to the top or middle of the strut rear section 401 and is located on the side of the strut rear section 401 close to the strut front section 402, so that the folding angle of the seat is larger.

[0082] That is, in this embodiment, the strut rear section 401, the strut base 105, the strut top connector 403, and the strut front section 402 constitute a four-bar linkage, and the strut rear section 401, the strut top connector 403, and the strut front section 402 in the four-bar linkage can rotate relative to the strut base 105 under the driving of the strut motor 404, so as to realize the folding of the seat, and the specific folding angle can be controlled by the strut motor 404.

[0083] Further, referring to Figure 6 and Figure 7 , the two sides of the strut rear section 401 are curved in the direction close to the strut front section 402 to form first side wings 401a, and the two sides of the strut front section 402 are curved in the direction close to the strut rear section 401 to form second side wings 402a, wherein the second side wings 402a are located inside the first side wings 401a and have a gap therebetween; see Figure 6 When the foldable seat is raised to the highest position, the distance between the strut rear section 401 and the strut front section 402 in the front-rear direction (as shown by the bidirectional arrow in Figure 6 ) is the largest, and the front end of the second side wing 402a close to the strut rear section 401a is shielded by the front end of the first side wing 401a close to the strut front section 402 (i.e., the front end portions of the two overlap, but they do not contact each other), that is, when viewed from the left and right sides of the seat strut 4, the front end portion of the second side wing 402a is shielded by the front end portion of the first side wing 401a, so that the strut front section and the strut rear section appear to be an integral whole; when the foldable seat is lowered to the lowest position, the distance between the strut rear section 401 and the strut front section 402 in the front-rear direction (as shown by the bidirectional arrow in Figure 7The gap between the first side wing 401a and the second side wing 402a is the smallest, and the first side wing 401a completely covers the second side wing 402a (but the two are not in contact), that is, when viewed from the left and right sides of the seat support 4, the support front section 402 and the support rear section 401 are still an integral whole, but the second side wing 402a is almost completely covered by the first side wing 401a, see Figure 7 , so that the size of the seat support is reduced. Preferably, in order to avoid interference between the two side wings, the curvature of the first side wing 401a is greater than that of the second side wing 402a, so that when the seat is in the lowest position, the gap between the front end of the second side wing 402a and the inside of the end of the first side wing 401a (i.e., the end connected to the support rear section 401) is smaller than the gap between the end of the second side wing 402a (i.e., the end connected to the support front section 402) and the front end of the first side wing 401a, as shown in Figure 7 . Of course, further, the front end of the second side wing 402a is provided with an inclined surface close to the outside of the first side wing 401, so as to further prevent interference from occurring.

[0084] Further, in some embodiments, one side of the backrest 6 is provided with a seat adjustment button 20 for controlling the support motor 404, so that the user can control the support motor 404 through the seat adjustment button 20, thereby achieving manual adjustment of the folding angle of the seat, that is, the height of the seat. For example, when pressed continuously, the seat continuously descends or rises through the support motor 404, and when the pressing is stopped, the descending or rising is also stopped. That is, the support motor 404 is controlled through the seat adjustment button 20, and the support motor 404 drives the support motor upper strut 405 and the support motor lower strut 406 to extend and shorten, so that the support rear section 401 rotates relative to the lower vehicle body frame 101 and the support base 105, so that the support top connector 403 moves upward smoothly under the action of the four-bar linkage structure. The entire folding mode adopts a four-bar linkage mechanism, which is more stable and safer than a two-bar or three-bar mechanism; and in order to adapt to different sitting postures in different application scenarios (for example, when walking, the axis of the seat cushion is above the horizontal line and has a certain angle with the horizontal line; and when entering under a table, the axis of the seat cushion is parallel to the horizontal line), the four-bar linkage mechanism is not a parallelogram structure to adapt to the adjustment of different sitting postures.

[0085] Further, the back of the backrest 6 is provided with a rear indicator 16 and a rear display 17, and the lower vehicle body 1 is provided with a battery 19, which is electrically connected with the support motor 404 to supply power to the support motor 404. Of course, the battery 19 can also supply power to other electronic devices. For example, the rear indicator 16, the rear display 17, etc. described above. Of course, if the electric scooter is also provided with a central controller, the battery also supplies power to the central controller.

[0086] Furthermore, a control handle 9 is provided on each of the handrails 8, allowing the user to control the direction of travel of the electric mobility scooter via the control handle 9. Furthermore, a mobile phone holder 11 is provided on the other handrail 8.

[0087] Of course, the aforementioned foldable mechanism of the electric mobility scooter in this embodiment can also be applied to other devices to achieve adjustment of the height of the target object and fine adjustment of its horizontal displacement. Furthermore, the angle between the bottom of the target object and the horizontal plane (or the plane on which the device with the foldable mechanism is installed) can also be adjusted, for example, the angle between the fourth link between the first pivot O1 and the fourth pivot O4 and the plane M.

[0088] Example 3: This utility model also provides another electric mobility scooter, see [link to example]. Figure 1 and Figure 8 The electric mobility scooter also includes a shock absorption device 5, specifically comprising: a rear suspension for supporting the wheels, and a rear shock absorber 502 disposed on one side of the rear suspension; wherein,

[0089] The rear suspension includes: a suspension hanger fixedly connected to the lower body frame 101 of the electric mobility scooter; a rear control arm 501 rotatably connected to the suspension hanger via a control arm rotation shaft 506; one side of the rear control arm 501 is fixedly connected to a wheel motor mounting bracket 304 mounted on the lower body frame 101; and the bottom of the rear control arm 501 is rotatably connected to one end of a rear shock absorber 502, while the other end of the rear shock absorber 502 is rotatably mounted on the lower body frame 101, and the axis of the rear shock absorber 502 is parallel to the length direction of the electric mobility scooter (e.g., ...). Figure 8 (in the Y-axis direction); wherein, the connection point between the rear swing arm 501 and the wheel motor mounting bracket 304, the connection point between the rear swing arm 501 and the rear shock absorber 502, and the swing arm rotation axis 506 form a triangle, and the plane of the triangle is parallel to the axial direction of the rear shock absorber 502 (or the axial direction of the rear shock absorber 502 is located in the plane of the triangle), thereby converting the longitudinal up-and-down vibration of the wheel motor mounting bracket 304 into the axial movement of the elastic buffer component in the rear shock absorber 502 through the rear swing arm 501.

[0090] Preferably, the rear control arm 501 adopts a triangular structure, with one vertex serving as the connection point between the rear control arm 501 and the rear shock absorber 502, and the other two vertices serving as the connection point between the rear control arm 501 and the wheel motor mounting bracket 304, and the mounting point for mounting the control arm rotation shaft 506, respectively. Preferably, the rear control arm 501 adopts a right-angled triangle, with the hypotenuse side close to the rear wheel 3, and the control arm rotation shaft 506 is mounted at the vertex between the two right-angled sides.

[0091] In some embodiments, the axial direction of the elastic buffer member is parallel to the horizontal direction (e.g., Figure 8The rear shock absorber 502 is preferably a reverse-pull type shock absorber.

[0092] Referring to Figure 8 and Figure 9 The rear shock absorber specifically includes a shock absorber spring 504 (i.e., an elastic buffering component), a shock absorber inner shaft 505, and a shock absorber outer shaft base, which is installed on the shock absorber inner shaft 505 in a slidable manner, wherein

[0093] One end of the shock absorber inner shaft 505 is rotationally connected to the lower vehicle body frame 101 (specifically, see Figure 8 and Figure 9 A shock absorber front mounting seat 107 is fixedly arranged on the lower vehicle body frame 101, and is rotationally connected to one end of the shock absorber inner shaft 505 through a shock absorber inner shaft connecting point 108. Preferably, the shock absorber inner shaft connecting point 108 adopts a connecting shaft (e.g., a bolt), and the axial direction of the connecting shaft is perpendicular to the axial direction of the shock absorber inner shaft 505. The other end is rotationally connected to the rear swing arm 501.

[0094] The shock absorber spring 504 is sleeved on the shock absorber inner shaft 505, and one end of the shock absorber spring 504 abuts against a first base body 503a at one end of the shock absorber outer shaft base, and the other end abuts against a second base body 503c at the other end of the shock absorber outer shaft base. Referring to Figure 9 The first base body 503a and the second base body 503c are fixedly connected together through a shock absorber outer shaft pull rod 503b.

[0095] Referring to Figure 8 and Figure 9 In some embodiments, one end of the shock absorber inner shaft 505 penetrates through the first base body 503a and is rotationally connected to the shock absorber inner shaft connecting point 108 at the shock absorber front mounting seat 107; the other end is fixedly connected with a shock absorber inner shaft base 505a, which is slidingly connected with the second base body 503c through a first connecting rod 507. The first connecting rod 507 is fixedly connected with the second base body 503c and can slide along the axial direction of the shock absorber inner shaft 505. Preferably, referring to Figure 8 and Figure 9 The other end of the shock absorber spring 504 abuts against the shock absorber inner shaft base 505a. The side of the second base body 503c away from the shock absorber inner shaft 505 is rotationally connected to the shock absorber outer shaft connecting point 503d with the rear swing arm 501 through a second connecting rod 508 (which is fixedly connected with the second base body 503c). Preferably, the first connecting rod 507 and the second connecting rod 508 are coaxially arranged (i.e., the axial directions of the two coincide), or they are one component.

[0096] Preferably, referring to Figure 1 and Figure 1 The rear shock absorber 502 is arranged on one side of the lower vehicle body frame 101 of the electric scooter and in front of the rear suspension, and the axial direction of the rear shock absorber 502 is parallel to the length direction of the lower vehicle body frame 101 (i.e., the Y-axis direction in the figure).

[0097] Preferably, the suspension hanger includes a hanger base 1041 fixedly installed on the lower vehicle body frame 101, and a hanger body arranged in an L shape at the top of the hanger base 1041. Specifically, the hanger body includes a first body 1042a and a second body 1042b connected vertically, wherein the first body 1042a is fixedly connected to the top of the hanger base 1041 at an end thereof away from the second body 1042b, and the second body 1042b extends from the end of the first body 1042a away from the hanger base 1041 in a direction perpendicular to the axial direction of the first body 1042a and close to the lower vehicle body frame 101, so that an installation space for installing the rear swing arm 501 is formed between the inner side of the second body 1042b, the inner side of the first body 1042a, and the outer side of the hanger base 1041. The wheel motor mounting bracket 304 is installed on the rear wheel 3 and fixedly connected to the rear swing arm 501 at one end thereof. Thus, the connection point between the rear swing arm 501 and the wheel motor mounting bracket 304, the connection point between the rear swing arm 501 and the rear shock absorber 502, and the swing arm rotation axis 506 form a triangle, and the plane of the triangle is parallel to the axial direction of the rear shock absorber 502 (or the axial direction of the rear shock absorber 502 is in the plane of the triangle). The distance between the plane of the triangle and the lower vehicle body frame is smaller than the distance between the outermost side of the rear wheel 3 and the lower vehicle body frame, so that not only the vertical vibration of the wheel motor mounting bracket 304 along the longitudinal direction is converted into the axial movement of the elastic buffering component in the rear shock absorber 502 through the rear swing arm 501, but also the overall width of the electric scooter is reduced, and the passability of the electric scooter is improved to some extent.

[0098] Embodiment 4: Since the user group of the electric scooter is the elderly, the disabled and the like who are not able to move, most of the elderly and the disabled are slow in response, and sometimes cannot release the speed control lever in time, which will hit pedestrians or obstacles, causing damage to personal safety of themselves and others, especially when the scooter is running on uneven road surface, it is difficult to keep the speed at a comfortable state. In addition, during the running process, since the user is in a sitting position, the view is limited, and some obstacles or special road conditions (for example, potholes, etc.) cannot be discovered in time, so that the running process cannot be in a comfortable state. Moreover, with the intelligentization of the electric scooter, some high-end scooters are also equipped with path planning and obstacle avoidance auxiliary intelligent systems and the like. And these all need to collect the road conditions or the surrounding environment through sensors and other sensing devices, so as to make better decisions. Therefore, people in the prior art continue to put forward various sensors, radars and other devices in the electric scooter to sense the road conditions.

[0099] For example, the Chinese patent application for invention with publication number CN106542029A discloses an old intelligent scooter, which is provided with a detector electrically connected with a controller, the detector includes a first detector and a second detector, which are respectively used to collect pedestrians and obstacles in front of and behind the driver, the scooter is also provided with a first camera device electrically connected with the controller, which is used to collect the road surface conditions in front of the driver and transmit the collected signals to the controller, the controller is embedded with a road speed module, and the controller selects the corresponding road speed through the road speed module according to the collected road conditions and instructs to control the running speed of the motor.

[0100] For example, the Chinese utility model patent with publication number CN203652012U discloses an electric scooter detection device, which is provided with radar detection members (such as automobile reversing radar or ultrasonic wave, infrared ray and the like detection members) at the front and rear edges of the frame, and is provided with vibration detection members and balance detection members at appropriate positions of the frame, so that when the radar detection members detect road obstacles or the vibration detection members detect uneven ground, the balance detection members are cooperated to drive the transmission unit to drive the clamping arms of the fork wheel unit to rotate, so that the electric scooter can climb slopes or stairs.

[0101] However, the above-mentioned electric scooters only consider the detection of the front and rear ends of the vehicle, and ignore other directions, for example, the left front and right front, and different detection heights. That is, the detection device or sensing system of the existing electric scooters still needs to be improved. In view of this, see Figure 2The electric scooter comprises a lower vehicle body 1, a pedal 21 arranged at the front end of the lower vehicle body 1, an anti-tilting mechanism 18 arranged at the rear end of the lower vehicle body 1 (the specific structure of the anti-tilting mechanism 18 is described in Embodiment 5 and will not be repeated here), and a sensing system arranged on the electric scooter. Specifically, the sensing system comprises: an ultrasonic sensing module and a laser radar module arranged at the front end of the pedal 21; and a distance sensor 10 arranged on the armrest 8 of the foldable seat, so that obstacles and other targets in front of the electric scooter during travel can be obtained from different heights or different detection ranges.

[0102] Referring to Figure 1 and Figure 2 The ultrasonic sensing module comprises: two ultrasonic radars 14 arranged symmetrically on the front side of the pedal 21, ultrasonic radars 14 arranged on the left and right sides of the pedal 21 respectively, and at least two ultrasonic radars 14 arranged on the protective cover 30 of the rear wheels 3. Preferably, the protective cover 30 is provided with one ultrasonic radar 14 corresponding to the position of each of the two rear wheels 3; and the middle part of the protective cover 30, i.e., the position corresponding to the anti-tilting mechanism 18, is also provided with one ultrasonic radar 14, and the height of the ultrasonic radar 14 in the middle part of the protective cover 30 is lower than that of the ultrasonic radars 14 on both sides.

[0103] Referring to Figure 1 The laser radar module adopts a laser radar 13 arranged between the two ultrasonic radars 14 on the front side of the pedal 21.

[0104] In order to avoid obstacles and other requirements, detection components such as ultrasonic radars and laser radars are usually arranged on the front and rear sides of the scooter to detect the distance, provide data reference for obstacle avoidance systems or path planning, or timely remind the user. However, in the prior art, on the one hand, only the front and rear directions are considered for detection, and other directions (for example, the left front or right front, especially when turning, the detection of the left front or right front is very important) are ignored. On the other hand, considering the cost, it is not necessarily better to have more detection components, and there are many types of detection components. Therefore, it is very important to reasonably utilize the cooperation between multiple detectors and the installation position on the basis of limited detection components, so as to cover most of the sensing directions required during the travel of the scooter without greatly increasing the cost, which will seriously affect the product promotion and consumer acceptance. If too much emphasis is placed on high detection accuracy and more detection components or high-cost detection components are used, the cost will be too high, the consumer acceptance will be too low, and the product promotion will be difficult. If the cost is too low, the detection accuracy will not meet the requirements, which will reduce the user experience, thereby reducing the consumer acceptance and making the product promotion very difficult.

[0105] In the prior art, a detection component is usually arranged at the middle of the front end or the rear end of the scooter, which is sufficient for a scooter with a narrow width, but the detection range is very limited for a four-wheeled scooter with a certain width, and even the situation near the wheels on both sides cannot be detected. Therefore, in the embodiment, two ultrasonic radars 14 are arranged on the front side of the pedal 21 to realize short-distance detection at a first height, and the detection range between the two ultrasonic radars 14 almost covers the detection range in front of the wheels on both sides.

[0106] In addition, during the driving of the electric scooter, the driving direction is frequently changed, such as turning. If only one detection component is arranged at the middle of the front end of the scooter to detect the front area, the situation near the vehicle or the wheels cannot be detected during the turning, and the situation near the obstacle can be detected only when the turning reaches a certain angle or even expands. This greatly reduces the user experience. Therefore, in the embodiment, one ultrasonic radar 14 is arranged on each of the left and right sides of the pedal 21 to detect the road conditions in the left front detection area and the right front detection area.

[0107] Further, the two front wheels 2 are installed on the front end of the lower vehicle body frame 101, and the pedal 21 is also installed on the front end of the lower vehicle body frame 101. The connecting axis between the pedal 21 and the front end of the lower vehicle body frame 101 is almost tangent to the front wheels 2, so that the front wheels 2 are also within the detection range of the ultrasonic radar 14.

[0108] More preferably, the ultrasonic radar 14 is arranged at the middle of each of the left and right sides of the pedal 21. That is, the distance between the ultrasonic radar 14 and the front end of the pedal 21 is the same as the distance between the ultrasonic radar 14 and the front wheels 2, so that the ultrasonic radars 14 on the left and right sides and the two ultrasonic radars 14 at the front end of the pedal 21 realize multi-directional detection in front of the pedal, left front and right front. If the installation position of the ultrasonic radar 14 is closer to the front end of the pedal 21, the road conditions around the front wheels 2 cannot be detected. If it is too close to the front wheels 2, it may not be able to work cooperatively with the ultrasonic radar 14 at the front end to realize seamless connection between the front and left front / right front. Therefore, in the embodiment, the ultrasonic radar 14 is arranged at the middle of each of the left and right sides of the pedal 21, so that its detection range can be connected with (that is, partially overlapped or adjacent to) the detection range of the ultrasonic radar 14 at the front end, and at the same time, it can cover the detection range near the front wheels 2.

[0109] However, it is not enough to only set the ultrasonic radar 14 at the front end, on the one hand, the detection distance of the ultrasonic radar 14 is limited, on the other hand, its accuracy is low and is easily disturbed by noise, therefore, in order to increase the detection accuracy, a laser radar 13 is also set at the middle part of the pedal 21 in this embodiment as an auxiliary, so as to realize detection in cooperation with the ultrasonic radar 14. If multiple laser radars 13 are all set at the front end of the pedal 21 in order to pursue accuracy and detection distance, the cost will inevitably be greatly increased, and the detection data of a single type of detection component is less reliable once the environment changes. Therefore, in this embodiment, different types of detection components are set at the front end to detect, and the data between the two types of detection components can be verified with each other once the environment changes. Of course, another detection component that is more suitable for the current environment can also be started alone.

[0110] Compared with the front end of the electric scooter, the road conditions at the rear end of the electric scooter are usually only needed to be paid close attention to when reversing, and only the conditions within a short distance range need to be paid attention to, therefore, if the same detection component layout as the front end is set at the rear end, not only the cost is increased, but also the detection components are not effectively utilized, which causes resource waste. Therefore, in this embodiment, three ultrasonic radars 14 are set on the protective cover 30 of the rear wheel 3, and among them, two ultrasonic radars 14 correspond to the upper rear of the rear wheel 3 respectively, and the third ultrasonic radar 14 is located between the two, and its height is lower than that of the two ultrasonic radars 14, so as to realize detection at different heights.

[0111] In this embodiment, since the rear wheel 3 is higher than the front wheel, in order to facilitate reversing, the ultrasonic radars 14 are set on the protective cover 30 to detect the positions corresponding to the two rear wheels 3, so as to realize obstacle avoidance of the rear wheel 3 and the like.

[0112] At the same time, since the rear end of the electric scooter is also provided with the anti-toppling mechanism 18 between the two rear wheels 3, and the length of the anti-toppling mechanism 18 is relatively long and the position is relatively low, if only the ultrasonic radars 14 are set on the protective cover 30 at positions corresponding to the two rear wheels 3, due to the high position, the anti-toppling mechanism 18 is in the blind area of the two ultrasonic radars 14, which causes inconvenience to the reversing process, and even cannot avoid obstacles and the like. And since the anti-toppling mechanism 18 has a certain width, in this embodiment, on the basis of setting the ultrasonic radars 14 corresponding to the two rear wheels 3, an ultrasonic radar 14 is also set on the middle part of the protective cover 30 (i.e. the distance between the ultrasonic radars 14 on both sides is the same), that is, above the anti-toppling mechanism 18, so as to ensure the safety and smoothness of the electric scooter during reversing.

[0113] In the process of driving, in addition to considering the short distance detection, the long distance detection also needs to be considered, on the one hand, so that the road conditions in front can be known in advance, thereby making corresponding decisions in advance, for example, switching paths or turning, etc. Therefore, in the embodiment, a distance sensor 10 is arranged at the front end of any armrest 8 of the foldable seat. Preferably, the distance sensor 10 adopts a TOF distance sensor.

[0114] Compared with the short distance detection, the long distance detection usually only needs to know the situation within a certain range in front of the driving direction, without considering the situation in a large range (for example, the surrounding), therefore, the TOF distance sensor with limited detection angle but long detection distance is arranged. And the distance sensor is directly arranged on the armrest 8, so that a separate mounting bracket is not needed for installation, not only reducing the cost, but also making the distance sensor can be folded together with the armrest to be protected.

[0115] Further, the pedal 21 is rotatably arranged at the front end of the lower body frame 101 of the lower body 1, so that the ultrasonic radar and the laser radar can also be folded and stored according to the pedal 21, and further protected, avoiding external collision, etc.

[0116] Further, an anti-collision groove 23 protruding in the driving direction is arranged at the front end of the pedal 21, so that the laser radar 13 can be installed in the anti-collision groove 23. By arranging the anti-collision groove 23, on the one hand, the laser radar 13 can be protected, and on the other hand, even if there is an obstacle in front, once the anti-collision groove 23 collides with the obstacle, the user can be informed in advance, so as to avoid further driving forward to cause the ultrasonic radar 14 to be collided. Preferably, the anti-collision groove 23 is located on the central axis of the pedal 21, that is, in the middle of the front side of the pedal 21, and the distance between the anti-collision groove 23 and any ultrasonic radar on the front side of the pedal 21 is equal to half the distance between the anti-collision groove 23 and any end of the front side of the pedal 21. That is, the laser radar and the ultrasonic radar divide the front side of the pedal 21 into four equal parts.

[0117] Further, referring to Figure 2 The sensing system further comprises an image acquisition module arranged at the rear side of the foldable seat. Preferably, the image acquisition module comprises a rear camera 15 arranged at the bottom of the backrest 6 at the rear side of the electric scooter.

[0118] Further, referring to Figure 10 The distance sensor 10 adopts a Tof distance sensor.

[0119] Embodiment 5: The utility model also provides another electric scooter, referring to Figure 11 The electric scooter further comprises an anti-toppling mechanism 18 arranged at the rear side. Specifically, referring to ​ and ​The anti-toppling mechanism 18 comprises:

[0120] The compression spring 181 (and the first elastic component) is coated with a rust-proof coating on the surface to prolong the service life, one end of the compression spring 181 is fixedly connected to the inner wall of the lower vehicle body 1, the other end of the compression spring 181 is fixedly connected with a guide plate 182 made of high-strength alloy material to improve the durability, the outer wall of the guide plate 182 is slidingly connected with the inner wall of the lower vehicle body 1, and the outer wall of the guide plate 182 is rotatably connected with an anti-toppling roller 183; the trigger spring 184 (i.e. the second elastic component) is made of high-elasticity alloy material to improve the resilience, one end of the trigger spring 184 is fixedly connected to the inner wall of the lower vehicle body 1, the other end of the trigger spring 184 is fixedly connected with a trapezoidal block 185 provided with a wear-resistant coating on the surface, the outer wall of the trapezoidal block 185 is slidingly connected with the inner wall of the lower vehicle body 1, and the bottom of the trapezoidal block 185 is fixedly connected with a vertical rod 186, and the bottom of the vertical rod 186 is rotatably connected with a trigger roller 187 provided with a sealed lubricated bearing part.

[0121] The electric scooter of the utility model can be driven by the rear wheel 3 through the control handle 9 in use, at this time, the trigger roller 187 is in contact with the ground under the action of the trigger spring 184, when the lower vehicle body 1 is inclined, the lower vehicle body 1 is inclined with the ground, at this time, the trigger roller 187 continues to move downwards under the action of the trigger spring 184, so that the trigger spring 184 drives the trapezoidal block 185 to move downwards, at this time, the trapezoidal block 185 is no longer clamped with the guide plate 182, so that the guide plate 182 is popped out under the action of the compression spring 181, so that the guide plate 182 drives the anti-toppling roller 183 to extend and be in contact with the ground, so that the inclined lower vehicle body 1 has an additional supporting point with the ground, which prevents the electric scooter from being overturned, improves the stability of the electric scooter in the inclined state, and avoids the safety hazard caused by overturning.

[0122] The damping device, the sensing system and the foldable mechanism of the electric scooter can be combined arbitrarily, that is, any one of them can be applied to the electric scooter alone, two of them can be combined and applied to the electric scooter, and all of them can be applied to the same electric scooter.

[0123] It should be noted that in this document, the terms "comprise", "comprising", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0124] The embodiments of the present application are described above with reference to the drawings; however, the present application is not limited to the specific embodiments described above, but the specific embodiments described above are merely illustrative rather than restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, and these all belong to the protection of the present application.

Claims

1. A shock absorbing device for a motorized scooter, characterized in that, The utility model relates to an electric scooter, and particularly relates to a rear suspension for supporting a rear wheel and a rear shock absorber arranged on one side of a lower vehicle body frame (101) of the electric scooter and located in front of the rear suspension, an axial direction of the rear shock absorber (502) being parallel to a length direction of the lower vehicle body frame (101). The rear suspension comprises: a wheel motor mounting bracket (304) mounted on a rear wheel (3) of the electric scooter; a suspension hanger fixedly connected to the lower vehicle body frame (101), the suspension hanger comprising a hanger base (1041) fixedly mounted on the lower vehicle body frame (101) and a hanger body arranged in an L shape on a top of the hanger base (1041); a rear swing arm (501) rotatably connected to one end of the hanger body away from the lower vehicle body frame (101) through a swing arm rotation shaft (506), one side of the rear swing arm (501) being fixedly connected to the wheel motor mounting bracket (304), and a bottom of the rear swing arm (501) being rotatably connected to one end of the rear shock absorber (502) close to the rear wheel (3), a connecting point between the rear swing arm (501) and the wheel motor mounting bracket (304), a connecting point between the rear swing arm (501) and the rear shock absorber (502), and the swing arm rotation shaft (506) forming a triangle, so that the rear swing arm (501) converts up-and-down vibration of the wheel motor mounting bracket (304) in a longitudinal direction into axial movement of an elastic buffering component in the rear shock absorber (502).

2. The shock absorbing device of claim 1, wherein, The axial direction of the elastic buffering component is parallel to a horizontal direction.

3. The shock absorbing device of claim 1, wherein the shock absorbing device is a shock absorbing device for an electric scooter. The hanger body comprises a first body (1042a) and a second body (1042b) connected vertically, wherein one end of the first body (1042a) away from the second body (1042b) is fixedly connected to a top of the hanger base (1041), and the second body (1042b) extends from one end of the first body (1042a) away from the hanger base (1041) in a direction perpendicular to an axial direction of the first body (1042a) and close to the lower vehicle body frame (101), so that an inner side of the second body (1042b), an inner side of the first body (1042a), and an outer side of the hanger base (1041) form a mounting space for mounting the rear swing arm (501).

4. The shock absorbing device of claim 1, wherein the shock absorbing device is a shock absorbing device for an electric scooter. The rear shock absorber (502) comprises a shock absorber spring (504) as the elastic buffering component, a shock absorber inner shaft (505), and a shock absorber outer shaft base, the shock absorber outer shaft base being mounted on the shock absorber inner shaft (505) in a slidable manner, one end of the shock absorber inner shaft (505) being rotatably connected to the lower vehicle body frame (101), and the other end being rotatably connected to the rear swing arm (501). The shock absorber spring (504) is sleeved on the shock absorber inner shaft (505), and one end of the shock absorber spring (504) abuts against the first base body (503a) at one end of the shock absorber outer shaft base, and the other end abuts against the second base body (503c) at the other end of the shock absorber outer shaft base.

5. The shock absorbing device of claim 4, wherein the shock absorbing device is a shock absorbing device for a motorized scooter. The first base body (503a) and the second base body (503c) are connected together through the shock absorber outer shaft pull rod (503b).

6. The shock absorbing device of claim 4, wherein the shock absorbing device is a shock absorbing device for a motorized scooter. Further comprising: The shock absorber front mounting seat (107) is rotatably connected with the shock absorber inner shaft (505) through the shock absorber inner shaft connecting point (108) away from the rear wheel (3).

7. The shock absorbing device of claim 6, wherein the shock absorbing device is a shock absorbing device for a motorized scooter. The axial direction of the shock absorber inner shaft connecting point (108) is perpendicular to the axial direction of the shock absorber inner shaft (505).

8. The shock absorbing device of claim 6, wherein the shock absorbing device is a shock absorbing device for a motorized scooter. One end of the shock absorber inner shaft (505) penetrates through the first base body (503a) and is rotatably connected with the shock absorber inner shaft connecting point (108) mounted on the shock absorber front mounting seat (107); the other end is fixedly connected with the shock absorber inner shaft base (505a), and the shock absorber inner shaft base (505a) is slidably connected with the second base body (503c) through the first connecting rod (507).

9. The shock absorbing device of claim 8, wherein the shock absorbing device is a shock absorbing device for a motorized scooter. The other end of the shock absorber spring (504) abuts against the shock absorber inner shaft base (505a).

10. The shock absorbing device of claim 8, wherein the shock absorbing device is a shock absorbing device for a motorized scooter. The second base body (503c) is rotatably connected with the rear swing arm (501) through the second connecting rod (508) at the shock absorber outer shaft connecting point (503d) away from the shock absorber inner shaft (505).

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