Mid-wheel drive mobility scooter

Abstract

The utility model relates to the field of electric wheelchair, especially to intermediate single handle control walking aid, including car chassis, still including the car seat of installation on car chassis and the drive wheel of setting in car chassis both sides, the side fixed mounting of car chassis surface has the mounting bracket, the both ends of mounting bracket rotatory mounting have car wheel frame one and car wheel frame two respectively, and be provided with the steering wheel in car wheel frame one and car wheel frame two, the upper end of car wheel frame two is fixedly connected with connecting rod block through the stem, when connecting rod block turns to, can drive car wheel frame two to turn left or right through the stem, the sleeve pipe of stem and mounting bracket is rotatory connection, the upper end fixed connection of mounting bracket surface has the support seat, the utility model discloses through folding type structure, place single handle structure in the middle of car body, and personnel control steering wheel steering through handle, and its control mode is basically identical with existing two -wheeled vehicle, and learning adaptation is easier, and the T type structure of single handle makes steering operation more labor saving.

Description

Technical Field

[0001] This utility model relates to the field of electric wheelchairs, and more particularly to a mobility scooter with a single handlebar in the middle. Background Technology

[0002] An electric wheelchair is an electrically powered wheelchair device designed to provide independent mobility for people with mobility impairments. Powered by batteries, it is equipped with an electric motor and a control system that allows users to control the wheelchair's forward, backward, left, and right movements using simple joysticks, buttons, or other control methods, without relying on others to push it. With continuous technological advancements, the design and performance of electric wheelchairs have been significantly improved, including longer battery life, more intelligent control systems, and more comfortable seat designs. These improvements have attracted more users and increased user satisfaction. Depending on the operating method, electric wheelchairs also come in various structures, such as joystick structures and dual-handle structures. However, existing dual-handle mobility scooters require users unfamiliar with the steering mechanism to learn how to use them, especially since the handlebars are too short and require considerable strength from both hands. Although the handlebars can be folded, they still obstruct the view on both sides, making it inconvenient for disabled people to get on and off the scooter. Furthermore, most mobility scooters use a differential axle drive system for the rear wheel, where the differential axle and two trailing arms are fixed as a whole on the frame, and shock-absorbing springs are installed between the differential axle and the frame. Since the rear axle moves up and down as a whole, it is easy for one of the rear wheels to lose contact with the ground in uneven environments.

[0003] Therefore, to solve the above problems, we propose a single-handle throttle-operated mobility scooter with the throttle set in the middle position. The operation method is basically the same as that of existing two-wheeled vehicles, making it easier to learn and adapt to. Utility Model Content

[0004] In order to overcome the problems of existing dual-handle electric wheelchairs being inconvenient to operate and easily obstructing traffic, making it difficult to get on and off.

[0005] The technical solution of this utility model is as follows: a single-handle-operated mobility scooter, including a chassis, a seat mounted on the chassis, and drive wheels on both sides of the chassis. A mounting frame is fixedly installed on the side of the chassis surface. A wheel frame one and a wheel frame two are rotatably mounted on both ends of the mounting frame. A steering wheel is provided in the wheel frame one and the wheel frame two. A connecting rod block is fixedly connected to the upper end of the wheel frame two through a rod. When the connecting rod block turns, the wheel frame two can be turned to the left or right through the rod. The rod and the sleeve of the mounting frame are rotatably connected. A bracket is fixedly connected to the upper end of the mounting frame surface. A folding handle structure is rotatably mounted on the bracket. The chassis also contains a battery and other structures, which are not within the protection scope of this application and will not be described in detail. A differential axle structure is provided on the side of the lower end of the vehicle chassis. The two output ends of the differential axle structure are connected to the drive wheels respectively. A connecting crossbeam is welded and fixed on both sides of the lower end of the vehicle chassis. A trailing arm is rotatably mounted on both sides of the lower end of the connecting crossbeam. An auxiliary wheel is rotatably mounted on the end of the trailing arm away from the connecting crossbeam. A shock-absorbing structure is provided between the trailing arm and the vehicle chassis. The differential axle structure is provided with a motor and other existing drive structures. This application does not improve upon these structures and will not describe them in detail.

[0006] Preferably, the seat is an adjustable seat cushion and backrest, with an adjustable rotatable connection between the backrest and the seat cushion, and handrails are provided on both sides of the chassis surface on the seat, and a push handle is provided on the back of the backrest.

[0007] Preferably, both wheel frame one and wheel frame two are equipped with a braking structure, and wheel frame one and wheel frame two are connected by a transmission link. One end of the transmission link is rotatably connected to the rear end of wheel frame one, and the other end of the transmission link is rotatably connected to the rear end of wheel frame two. When wheel frame two turns, the transmission link transmits power to wheel frame one, so that wheel frame one and wheel frame two keep rotating in the same direction.

[0008] Preferably, the folding handlebar structure includes a support arm, one end of which is provided with a sleeve, the sleeve and the end of the support arm are rotatably connected, the end of the support arm is a cylindrical structure, the other end of the support arm is provided with a sleeve, a transmission rod is provided in the sleeve, the upper end of the transmission rod extends to the top of the sleeve and is fixedly installed with a handlebar, and a handbrake lever is provided at both ends of the handlebar. The handlebar should also have driving control accessories, such as horn button, light control, etc., which are conventional structural settings and will not be described in detail in this application. One side of the sleeve surface is fitted with a pin rod, and the surface of the bracket is provided with a pin hole for connecting with the pin rod. When the pin rod enters the pin hole, it limits and fixes the bracket and the bracket arm. The other side of the sleeve surface is threaded with a locking bolt. The end of the locking bolt is provided with a handle. When the locking bolt is rotated, the end of the locking bolt can fit against the bracket to fix the position of the bracket.

[0009] Preferably, the lower end of the transmission rod extends to the bottom of the sleeve and is fixedly connected to a transmission plate. One end of a fixed connecting rod is rotatably mounted on the end of the transmission plate. The other end of the fixed connecting rod is connected to the connecting rod block through a rotating component. When the handlebars are turned, the transmission plate is simultaneously driven to turn, and the power is transmitted to the connecting rod block by the fixed connecting rod.

[0010] Preferably, the rotating component includes an inner rotating block, the surfaces of the inner rotating block and the connecting rod block are rotatably connected by a connecting shaft, an outer rotating frame is provided on the outside of the inner rotating block, the outer rotating frame has a U-shaped structure, and the two ends of the outer rotating frame and the inner rotating block are rotatably connected by a shaft. When the fixed connecting rod translates, the outer rotating frame rotates outside the inner rotating block, and when the fixed connecting rod flips, the inner rotating block rotates around the connecting shaft.

[0011] Preferably, connecting plates are fixedly installed on both sides of the differential axle structure surface. A positioning shaft is provided between one end of the connecting plate surface and the trailing arm. The upper end of the positioning shaft is rotatably connected to the connecting plate, and the lower end of the positioning shaft is fixedly connected to the trailing arm. A positioning shaft is rotatably installed on the other end of the connecting plate surface. The end of the positioning shaft away from the connecting plate is rotatably connected to the surface of the connecting crossbeam. A bracket is fixedly connected to the surface of one of the trailing arms. A positioning shaft is rotatably installed on the bracket. The end of the positioning shaft away from the bracket is rotatably connected to the bottom of the vehicle chassis.

[0012] Preferably, the shock absorption structure includes a shock absorber, with protruding seats at both the upper and lower ends of the shock absorber. The two protruding seats are rotatably connected to the trailing arm and the chassis, respectively, and a shock absorption spring is fixedly installed between the two protruding seats. The shock absorption spring is fitted on the outside of the shock absorber.

[0013] The beneficial effects of this utility model are: 1. This single-handle-operated mobility scooter features a folding structure that places the single handlebar in the middle of the vehicle body. The user controls the steering wheel by using the handlebar, and the operation method is basically the same as that of existing two-wheeled vehicles, making it easier to learn and adapt to. Furthermore, the T-shaped structure of the single handlebar makes steering operation more effortless. 2. This single-handle-operated mobility scooter features a rotating support arm and support base that allows the handlebars to be flipped up, thus not affecting the front space of the seat. At the same time, the handlebars are located on one side, leaving the other side unobstructed, making it convenient for users to get on and off the scooter.

[0014] 3. This single-handle-operated mobility scooter connects the frame and the differential axle through multiple positioning shafts, making the differential axle and the trailing arm a separate connection structure. The wheels on both sides can move up and down independently, which improves the contact between the drive wheels and the ground in uneven environments and ensures safety. Attached Figure Description

[0015] Figure 1 The diagram shown is a schematic representation of the overall structure of the single-handle-operated mobility scooter of this utility model. Figure 1 ; Figure 2 The diagram shown is a schematic representation of the overall structure of the single-handle-operated mobility scooter of this utility model. Figure 2 ; Figure 3The diagram shown is a schematic representation of the mounting frame structure for the single-handle control mobility scooter of this utility model. Figure 1 ; Figure 4 The diagram shown is a schematic representation of the mounting frame structure for the single-handle control mobility scooter of this utility model. Figure 2 ; Figure 5 This utility model is shown Figure 4 Schematic diagram of the structure at point A in the middle; Figure 6 The diagram shown is a schematic representation of the differential bridge structure of the single-handle-operated mobility scooter of this utility model. Figure 7 The diagram shown is a schematic diagram of the positioning shaft structure of the single-handle control mobility scooter of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 1. Chassis; 2. Seat; 3. Drive wheel; 4. Mounting bracket; 5. Wheel bracket one; 6. Wheel bracket two; 61. Transmission link; 7. Steering wheel; 8. Linkage block; 9. Bracket seat; 91. Bracket arm; 911. Pin rod; 912. Pin hole; 913. Locking bolt; 92. Transmission rod; 93. Handlebar; 94. Transmission plate; 95. Fixed link; 951. Inner rotating block; 952. Outer rotating frame; 10. Connecting crossbar; 11. Trailing arm; 111. Positioning shaft three; 12. Auxiliary wheel; 13. Connecting piece; 131. Positioning shaft one; 132. Positioning shaft two; 14. Shock absorber. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Please see Figures 1-7This utility model provides an embodiment of a single-handle-operated mobility scooter, including a chassis 1, a seat 2 mounted on the chassis 1, and drive wheels 3 disposed on both sides of the chassis 1. The seat 2 is an adjustable cushion and backrest, with an adjustable rotatable connection between the backrest and the cushion. Handrails are provided on both sides of the seat 2 on the surface of the chassis 1, and a push handle is provided on the back of the backrest. A mounting bracket 4 is fixedly mounted on the side of the chassis 1. Wheel bracket 1 5 and wheel bracket 2 6 are rotatably mounted at both ends of the mounting bracket 4, and steering wheels 7 are provided in wheel bracket 1 5 and wheel bracket 2 6. A connecting rod block 8 is fixedly connected to the upper end of wheel bracket 2 6 via a rod. When the connecting rod block 8 turns, the wheel bracket 2 6 can be turned left or right via the rod. The rod and the mounting bracket 4... The sleeve is a rotatable connection. A bracket 9 is fixedly connected to the upper end of the mounting bracket 4. A folding handle structure is rotatably mounted on the bracket 9. A differential axle structure is provided on the lower side of the chassis 1. The two output ends of the differential axle structure are respectively connected to the drive wheels 3. A connecting crossbeam 10 is welded and fixed to both sides of the lower end of the chassis 1. A trailing arm 11 is rotatably mounted on both sides of the lower end of the connecting crossbeam 10. An auxiliary wheel 12 is rotatably mounted on the end of the trailing arm 11 away from the connecting crossbeam 10. A shock-absorbing structure is provided between the trailing arm 11 and the chassis 1. The single handle structure makes the steering handle located in the middle, so the operation method is more traditional and easy to learn. At the same time, the steering operation is more effortless. After the single handle is flipped, it only blocks one side, leaving the other side unblocked, which is convenient for users to get on and off the vehicle.

[0019] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 In this embodiment, both wheel frame 5 and wheel frame 6 are equipped with brake structures, and wheel frame 5 and wheel frame 6 are connected by a transmission link 61. One end of the transmission link 61 is rotatably connected to the rear end of wheel frame 5, and the other end of the transmission link 61 is rotatably connected to the rear end of wheel frame 6. When wheel frame 6 turns, the transmission link 61 transmits power to wheel frame 5, so that wheel frame 5 and wheel frame 6 rotate in the same direction. The transmission link 61 connects the two wheel frames, so that when wheel frame 6 rotates, the wheels on both sides turn synchronously, realizing the single-handle operation requirement.

[0020] Please see Figure 3 , Figure 4 and Figure 5In this embodiment, the folding handle structure includes a support arm 91. One end of the support arm 91 is provided with a sleeve, and the sleeve and the end of the support base 91 are rotatably connected. The end of the support base 91 is a cylindrical structure. The other end of the support arm 91 is provided with a sleeve, and a transmission rod 92 is provided in the sleeve. The upper end of the transmission rod 92 extends to the top of the sleeve and is fixedly installed with a handlebar 93. Handbrake levers are provided at both ends of the handlebar 93. A pin rod 911 is installed on one side of the surface of the sleeve. The surface of the support base 9... A pin hole 912 is provided for connection with the pin 911. When the pin 911 enters the pin hole 912, it limits and fixes the bracket base 9 and the bracket arm 91. A locking bolt 913 is threaded on the other side of the sleeve surface. The end of the locking bolt 913 is provided with a handle. When the locking bolt 913 is rotated, the end of the locking bolt 913 can fit against the bracket base 9 to fix the position of the bracket base 9. The lower end of the transmission rod 92 extends to the bottom of the sleeve and is fixed. A transmission plate 94 is connected, and one end of a fixed connecting rod 95 is rotatably mounted on the end of the transmission plate 94. The other end of the fixed connecting rod 95 is connected to the connecting rod block 8 via a rotating component. When the handlebar 93 rotates, it synchronously drives the transmission plate 94 to steer, and the fixed connecting rod 95 transmits power to the connecting rod block 8. The rotating component includes an inner rotating block 951, and the surfaces of the inner rotating block 951 and the connecting rod block 8 are rotatably connected via a connecting shaft. An outer rotating frame 952 is provided on the outer side of the inner rotating block 951. The moving frame 952 has a U-shaped structure. The two ends of the outer rotating frame 952 and the inner rotating block 951 are rotatably connected by a shaft. When the fixed connecting rod 95 moves, the outer rotating frame 952 rotates outside the inner rotating block 951. When the fixed connecting rod 95 flips, the inner rotating block 951 rotates around the connecting shaft. The pin rod 911 is used for limiting and fixing the handlebar 93 when it is laid flat, while the locking bolt 913 is used for limiting and fixing after flipping. It can adapt to different fixing requirements and facilitate the folding of the handlebar 93.

[0021] Please see Figure 2 , Figure 6 and Figure 7In this embodiment, connecting plates 13 are fixedly installed on both sides of the differential axle structure surface. A positioning shaft 131 is provided between one end of the connecting plate 13 and the trailing arm 11. The upper end of the positioning shaft 131 is rotatably connected to the connecting plate 13, and the lower end of the positioning shaft 131 is fixedly connected to the trailing arm 11. A positioning shaft 132 is rotatably installed on the other end of the connecting plate 13. The end of the positioning shaft 132 away from the connecting plate 13 is rotatably connected to the surface of the connecting crossbeam 10. A bracket is fixedly connected to the surface of one of the trailing arms 11, and a positioning shaft is rotatably installed on the bracket. The third positioning shaft 111, the end of which is away from the bracket, is rotatably connected to the bottom of the chassis 1. The shock absorption structure includes a shock absorber 14. Both the upper and lower ends of the shock absorber 14 are provided with protruding seats. The two protruding seats are rotatably connected to the trailing arm 11 and the chassis 1, respectively. A shock-absorbing spring is fixedly installed between the two protruding seats. The shock-absorbing spring is sleeved on the outside of the shock absorber 14. The movable connection formed by multiple positioning shafts makes the differential bridge and the trailing arm 11 a separate connection structure. The wheels on both sides can jump up and down separately. In uneven environments, this makes the drive wheel 3 better fit with the ground.

[0022] When in operation, the handlebar 93 can be flipped up to one side to avoid affecting the front space of the seat. With the handlebar 93 on one side, the other side is unobstructed, making it convenient for users to get on and off the vehicle. After the user gets on the vehicle, the handlebar 93 is flipped up to the flat position. The pin is connected to the pin of the pin rod 911 and the pin hole 912 to achieve the limit. During driving, the user can turn the handlebar 93 to achieve steering operation. The operation method is basically the same as that of existing two-wheeled vehicles, which is easier to learn and adapt to and requires less effort. The rotation of the handlebar 93 drives the bottom transmission plate 94 to rotate synchronously. Under the connection of the fixed connecting rod 95, the power is transmitted to the second wheel frame 6. In the connection of the transmission connecting rod 61, the first wheel frame 5 and the second wheel frame 6 keep synchronous steering to achieve vehicle steering operation. At the same time, the movable connection formed by multiple positioning shafts at the bottom makes the differential bridge and the trailing arm 11 a separate connection structure, and the two wheels can jump up and down separately. In uneven environments, the drive wheel 3 has better contact with the ground.

[0023] Through the above steps, the single-handle structure places the steering handle in the middle, making the operation more traditional and easier to learn. At the same time, steering is less strenuous. When the single handle is flipped, it only obstructs one side, leaving the other side unobstructed, making it easier for users to get on and off the vehicle. This solves the problem that existing dual-handle electric wheelchairs are inconvenient to operate and easily obstruct, making it difficult to get on and off.

Claims

1. A single-handle-operated mobility scooter, comprising a chassis (1), characterized in that: It also includes a seat (2) mounted on the chassis (1) and drive wheels (3) set on both sides of the chassis (1). A mounting bracket (4) is fixedly installed on the side of the surface of the chassis (1). A wheel frame one (5) and a wheel frame two (6) are rotatably mounted on both ends of the mounting bracket (4). A steering wheel (7) is provided in the wheel frame one (5) and the wheel frame two (6). A connecting rod block (8) is fixedly connected to the upper end of the wheel frame two (6) through a rod. When the connecting rod block (8) turns, the wheel frame two (6) can be turned to the left or right through the rod. The rod and the sleeve of the mounting bracket (4) are rotatably connected. A bracket seat (9) is fixedly connected to the upper end of the surface of the mounting bracket (4). A folding handle structure is rotatably mounted on the bracket seat (9). A differential bridge structure is provided on the side of the lower end of the chassis (1). The two output ends of the differential bridge structure are connected to the drive wheels (3) respectively. A connecting crossbeam (10) is welded and fixed on both sides of the lower end of the chassis (1). A trailing arm (11) is rotatably installed on both sides of the lower end of the connecting crossbeam (10). An auxiliary wheel (12) is rotatably installed on the end of the trailing arm (11) away from the connecting crossbeam (10). A shock-absorbing structure is provided between the trailing arm (11) and the chassis (1).

2. The single-handle-operated mobility scooter according to claim 1, characterized in that: The seat (2) is an adjustable seat cushion and backrest. The backrest and seat cushion are connected by an adjustable rotatable connection. The surface of the chassis (1) is provided with handrails on both sides of the seat (2), and a push handle is provided on the back of the backrest.

3. The single-handle-operated mobility scooter according to claim 1, characterized in that: Both wheel frame one (5) and wheel frame two (6) are equipped with brake structures, and wheel frame one (5) and wheel frame two (6) are connected by a transmission link (61). One end of the transmission link (61) is rotatably connected to the rear end of wheel frame one (5), and the other end of the transmission link (61) is rotatably connected to the rear end of wheel frame two (6). When wheel frame two (6) turns, the transmission link (61) transmits power to wheel frame one (5), so that wheel frame one (5) and wheel frame two (6) keep rotating in the same direction.

4. The single-handle-operated mobility scooter according to claim 1, characterized in that: The folding handle structure includes a support arm (91), one end of the support arm (91) is provided with a sleeve, the sleeve and the end of the support base (9) are rotatably connected, the end of the support base (9) is a cylindrical structure, the other end of the support arm (91) is provided with a sleeve, a transmission rod (92) is provided in the sleeve, the upper end of the transmission rod (92) extends to the top of the sleeve and is fixedly installed with a handlebar (93), and the two ends of the handlebar (93) are respectively provided with handbrake levers; A pin rod (911) is installed on one side of the sleeve surface. The surface of the bracket (9) is provided with a pin hole (912) for connecting with the pin rod (911). When the pin rod (911) enters the pin hole (912), the bracket (9) and the bracket arm (91) are limited and fixed. A locking bolt (913) is threaded on the other side of the sleeve surface. The end of the locking bolt (913) is provided with a handle. When the locking bolt (913) is rotated, the end of the locking bolt (913) can fit with the bracket (9) to fix the position of the bracket (9).

5. The single-handle-operated mobility scooter according to claim 4, characterized in that: The lower end of the transmission rod (92) extends to the lower part of the sleeve and is fixedly connected to the transmission plate (94). The end of the transmission plate (94) is rotatably mounted with one end of the fixed connecting rod (95). The other end of the fixed connecting rod (95) is connected to the connecting rod block (8) through a rotating part. When the handlebar (93) rotates, it synchronously drives the transmission plate (94) to turn, and the fixed connecting rod (95) transmits the power to the connecting rod block (8).

6. The single-handle-operated mobility scooter according to claim 5, characterized in that: The rotating component includes an inner rotating block (951), and the surfaces of the inner rotating block (951) and the connecting rod block (8) are rotatably connected by a connecting shaft. An outer rotating frame (952) is provided on the outside of the inner rotating block (951). The outer rotating frame (952) has a U-shaped structure. The two ends of the outer rotating frame (952) and the inner rotating block (951) are rotatably connected by a shaft. When the fixed connecting rod (95) moves, the outer rotating frame (952) rotates on the outside of the inner rotating block (951). When the fixed connecting rod (95) flips, the inner rotating block (951) rotates around the connecting shaft.

7. The single-handle-operated mobility scooter according to claim 1, characterized in that: Connecting plates (13) are fixedly installed on both sides of the differential axle structure surface. A positioning shaft rod (131) is provided between one end of the connecting plate (13) surface and the trailing arm (11). The upper end of the positioning shaft rod (131) is rotatably connected to the connecting plate (13), and the lower end of the positioning shaft rod (131) is fixedly connected to the trailing arm (11). A positioning shaft rod (132) is rotatably installed on the other end of the connecting plate (13). The end of the positioning shaft rod (132) away from the connecting plate (13) is rotatably connected to the surface of the connecting crossbeam (10). A bracket is fixedly connected to the surface of one of the trailing arms (11). A positioning shaft rod (111) is rotatably installed on the bracket. The end of the positioning shaft rod (111) away from the bracket is rotatably connected to the bottom of the chassis (1).

8. The single-handle-operated mobility scooter according to claim 1, characterized in that: The shock absorption structure includes a shock absorber (14). Both the upper and lower ends of the shock absorber (14) are provided with protruding seats. The two protruding seats are rotatably connected to the trailing arm (11) and the chassis (1) respectively. A shock-absorbing spring is fixedly installed between the two protruding seats. The shock-absorbing spring is sleeved on the outside of the shock absorber (14).

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