Seat lifting structure and scooter

Abstract

The utility model discloses a seat lifting structure and a scooter. The problems that in the prior art, in the lifting process of a seat of a scooter, the horizontal displacement amplitude is too large, and the seat is inclined are solved. The seat lifting structure comprises a framework, a bearing seat, a posture adjusting arm, a lifting arm, a displacement compensation arm and a lifting driving piece. Wherein the bearing seat is arranged above the framework, one end of the posture adjusting arm is connected with the framework, and the other end is connected with the mounting seat; one end of the lifting arm is connected with the posture adjusting arm, and the other end is connected with the bearing seat; and one end of the displacement compensation arm is hinged with the lifting arm and the other end is hinged with the framework. After the lifting driving piece is pushed out, the displacement compensation arm hinged to the lifting arm can swing, the swing direction of the displacement compensation arm is opposite to the horizontal movement direction of the lifting arm and the bearing seat, and in the reverse swing process of the displacement compensation arm, the horizontal displacement of the bearing seat can be compensated. And therefore, the horizontal movement amplitude of the bearing seat in the lifting process is reduced.

Description

Technical Field

[0001] This utility model relates to a seat lifting structure and a personal transportation vehicle. Background Technology

[0002] Personal mobility vehicles are a type of transportation designed to facilitate people's travel. They are typically characterized by ease of operation, moderate speed, and high safety. The types and functions of personal mobility vehicles vary depending on the environment and needs.

[0003] For example, mobility scooters for the elderly are a type of mobility aid designed specifically for seniors. They typically feature large seats, comfortable suspension systems, and low-speed operation to meet the safety and comfort needs of seniors when traveling.

[0004] To meet the needs of people of different heights, some mobility scooters for the elderly are equipped with seat lifting functions to facilitate users getting on and off the vehicle. In order to realize the seat lifting function, a lifting device with folding function is installed between the seat and the chassis of the mobility scooter. In actual use, this lifting device has the following problems during the seat lifting process: the available space under the seat is small, the horizontal displacement during the seat lifting process is too large, and the seat tilts. Utility Model Content

[0005] The present invention aims to provide a seat lifting structure and a personal transportation vehicle to solve the above-mentioned technical problems.

[0006] In view of this, the present invention provides a seat lifting structure, comprising:

[0007] The frame, the support base, and the lifting assembly installed between the frame and the support base;

[0008] One end of the lifting assembly is hinged to the frame, and the other end is connected to the support base;

[0009] The lifting assembly is equipped with a lifting drive component, which can drive the lifting assembly to extend and retract, so that the support seat can rise and fall relative to the frame.

[0010] When the lifting assembly moves the support seat up and down, the lifting assembly can adjust the tilt posture of the support seat during the lifting process to keep the support seat horizontal.

[0011] When the lifting assembly drives the carrier seat to rise and fall, the lifting assembly can compensate for the horizontal displacement of the carrier seat during the lifting process, so as to reduce the horizontal movement of the carrier seat.

[0012] Furthermore, the lifting assembly includes:

[0013] The attitude adjustment arm is connected to the frame at one end and to the mounting base at the other end.

[0014] The lifting arm has one end connected to the attitude adjustment arm via a mounting base, and the other end connected to the support base;

[0015] The displacement compensation arm has one end hinged to the lifting arm and the other end hinged to the frame.

[0016] The lifting drive component is installed between the displacement compensation arm and the lifting arm. When the lifting drive component drives the displacement compensation arm and the lifting arm to extend or retract relative to each other, the lifting arm drives the bearing seat to rise or fall.

[0017] When the support seat is raised and lowered, the attitude adjustment arm can adjust the tilt posture of the support seat during the lifting process, so that the support seat remains horizontal;

[0018] Meanwhile, the displacement compensation arm can compensate for the horizontal displacement of the bearing seat during the lifting process, so as to reduce the horizontal movement of the bearing seat.

[0019] Furthermore, a first fixed shaft is provided on the displacement compensation arm, and a second fixed shaft is provided on the lifting arm. One of the first and second fixed shafts is rotatably connected to the main body of the lifting drive component, and the other of the first and second fixed shafts is rotatably connected to the drive rod of the lifting drive component.

[0020] Furthermore, when the lifting drive pushes the lifting arm to lift or lower, the lifting arm swings around its hinge point. The attitude adjustment arm can sense the swing angle of the lifting arm through its hinge point with the lifting arm, and adjust the attitude of the lifting arm by its own swing.

[0021] The swing direction of the attitude adjustment arm is opposite to that of the lifting arm. This reverse swing can counteract the tilting tendency of the lifting arm during the lifting process.

[0022] Furthermore, when the lifting drive pushes the lifting arm to raise or lower, the lifting arm swings around its hinge point. When the lifting arm produces a horizontal displacement, the displacement compensation arm counteracts the horizontal displacement of the lifting arm by swinging in the opposite direction.

[0023] Furthermore, the mounting base is provided with a first mounting part and a second mounting part, with a first rotating shaft passing through the first mounting part and a second rotating shaft passing through the second mounting part;

[0024] The lifting arm and attitude adjustment arm are hinged to the first rotating shaft, and the lifting arm and displacement compensation arm are hinged to the second rotating shaft.

[0025] Furthermore, the ends of the lifting arm and the attitude adjustment arm are hinged to the first rotating shaft, and the end of the displacement compensation arm is hinged to the second rotating shaft, wherein the hinge points of the first rotating shaft and the second rotating shaft do not coincide with those of the lifting arm.

[0026] Furthermore, the end of the lifting arm away from the attitude adjustment arm is hinged to the support seat, and a third rotating shaft and a fourth rotating shaft are mounted on the frame. The end of the displacement compensation arm away from the lifting arm is hinged to the third rotating shaft, and the end of the attitude adjustment arm away from the lifting arm is hinged to the fourth rotating shaft.

[0027] Furthermore, multiple sets of lifting arms are provided, and adjacent lifting arms are hinged together by a first series of rocker arms.

[0028] Multiple sets of displacement compensation arms are provided, and adjacent displacement compensation arms are hinged together by a second set of rocker arms.

[0029] Furthermore, the extension direction of the lifting arm and the extension direction of the displacement compensation arm are at an angle to each other, and the extension direction of the attitude adjustment arm and the extension direction of the lifting arm are at an angle to each other. The attitude adjustment arm is provided with a clearance part corresponding to the first fixed axis. The clearance part is configured to prevent the attitude adjustment arm from contacting the first fixed axis during rotation.

[0030] Furthermore, the lifting arms are located on both sides of the lifting drive component, and each lifting arm is equipped with a corresponding displacement compensation arm.

[0031] Furthermore, the seat lifting mechanism is located on one side below the support seat.

[0032] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0033] 1. The seat lifting structure is equipped with a displacement compensation arm. After the lifting drive component is extended, the displacement compensation arm hinged to the lifting arm will swing. The swing direction of the displacement compensation arm is opposite to the horizontal movement direction of the lifting arm and the support seat. During the reverse swing of the displacement compensation arm, the horizontal displacement of the support seat can be compensated, thereby reducing the horizontal movement amplitude of the support seat during the lifting process.

[0034] 2. The displacement compensation arm of the seat lifting structure is provided with a first fixed shaft, and the lifting arm is provided with a second fixed shaft. One of the first fixed shaft and the second fixed shaft is rotatably connected to the main body of the lifting drive component, and the other of the first fixed shaft and the second fixed shaft is rotatably connected to the drive rod of the lifting drive component. During the reverse swing of the displacement compensation arm, the lifting drive component will be driven to swing in the reverse direction through the first fixed shaft. The lifting drive component will drive the lifting arm to swing in the direction of the displacement compensation arm through the connected second fixed shaft, thereby further realizing the horizontal displacement compensation function of the bearing seat at the end of the lifting arm, thereby reducing the horizontal movement amplitude of the bearing seat during the lifting process.

[0035] 3. The seat lifting structure is located on one side below the support seat, which increases the space between the frame and the support seat, allowing for effective use of this space;

[0036] 4. Since the seat lifting structure is installed on one side below the support seat, in order to improve its support strength during the lifting process, this application provides multiple sets of lifting arms. Adjacent lifting arms are hinged together by a first set of rocker arms. Multiple sets of displacement compensation arms are provided. Adjacent displacement compensation arms are hinged together by a second set of rocker arms. When the lifting drive controls the lifting of the support seat, the multiple sets of swinging lifting arms are synchronized through the first set of rocker arms, and the multiple sets of swinging displacement compensation arms are synchronized through the second set of rocker arms, thereby improving the overall strength of the entire seat lifting structure.

[0037] 5. The lifting arm of the seat lifting structure is hinged to a posture adjustment arm. When the lifting drive controls the lifting arm to lift or lower, the posture adjustment arm can adjust the swing posture of the lifting arm to ensure that the end of the lifting arm near the bearing seat is always in a horizontal state. In this way, when the lifting arm drives the bearing seat to lift or lower, the bearing seat is always in a horizontal state and does not tilt.

[0038] 6. The lifting drive of this seat lifting structure adopts stepless speed regulation, which ensures good continuity of seat lifting and lowering, and the lifting speed can be adjusted.

[0039] In addition, this utility model provides a personal transportation vehicle, including the aforementioned seat lifting structure.

[0040] Furthermore, the vehicle has a seat mounted on its carrier and wheels mounted on its frame, with at least one wheel equipped with an electric motor.

[0041] Compared with the prior art, the beneficial technical effects of the personal transportation vehicle with seat lifting structure provided by this utility model are as described above, and will not be repeated here. Attached Figure Description

[0042] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0043] Figure 1 : Schematic diagram of the seat lifting structure (in the raised state) of specific embodiment 1 of this utility model;

[0044] Figure 2 : A top view of the seat lifting structure of a specific embodiment of this utility model 1;

[0045] Figure 3 : Figure 2 Schematic diagram of the cross section along line AA;

[0046] Figure 4 : A partial structural diagram of the seat lifting structure in specific embodiment 1 of this utility model;

[0047] Figure 5 : A partial structural diagram (from another angle) of the seat lifting structure in specific embodiment 1 of this utility model;

[0048] Figure 6 : A schematic diagram of the seat lifting structure in a folded state in specific embodiment 1 of this utility model;

[0049] Figure 7 : A side view of the seat lifting structure in the raised state in specific embodiment 1 of this utility model;

[0050] Figure 8 : A side view of the seat lifting structure in a folded state in specific embodiment 1 of this utility model;

[0051] Figure 9 : A schematic diagram of the personal transportation vehicle of Embodiment 2 of this utility model;

[0052] Figure 10 : A side view of the mobility vehicle (wheelchair in the raised state) in specific embodiment 2 of this utility model;

[0053] Figure 11 : A side view of the mobility vehicle (wheelchair in the lowered state) in specific embodiment 2 of this utility model.

[0054] Figure 12 : Schematic diagram of the front-to-back displacement change of the wheelchair in the lifting process of the mobility vehicle in specific embodiment 2 of this utility model.

[0055] Explanation of reference numerals in the attached drawings: 100, seat lifting structure; 10, frame; 101, third pivot; 102, fourth pivot; 11, support seat; 12, posture adjustment arm; 121, clearance part; 13, lifting arm; 131, first linked rocker arm; 14, displacement compensation arm; 141, second linked rocker arm; 15, lifting drive component; 16, mounting seat; 161, first mounting part; 162, second mounting part; 163, first pivot; 164, second pivot; 17, first fixed shaft; 18, second fixed shaft; 200, mobility vehicle; 20, wheelchair; 21, wheel; 22, electric motor. Detailed Implementation

[0056] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0057] Example 1

[0058] Reference Figures 1 to 5 A seat lifting structure 100 includes a frame 10, a support seat 11, a posture adjustment arm 12, a lifting arm 13, a displacement compensation arm 14, and a lifting drive component 15. The posture adjustment arm 12, the lifting arm 13, and the displacement compensation arm 14 form a lifting assembly. The lifting drive component 15 can drive the lifting assembly to extend and retract, so that the support seat 11 can be raised or lowered relative to the frame 10.

[0059] The support seat 11 is located above the frame 10. One end of the attitude adjustment arm 12 is connected to the frame 10 and the other end is connected to the mounting base 16. The attitude adjustment arm 12 is suitable for adjusting the tilt attitude of the support seat 11 during the lifting process.

[0060] One end of the lifting arm 13 is connected to the attitude adjustment arm 12, and the other end is connected to the support seat 11; one end of the displacement compensation arm 14 is hinged to the lifting arm 13, and the other end is hinged to the frame 10. The displacement compensation arm 14 is suitable for compensating the horizontal displacement of the support seat 11 during the lifting process.

[0061] The extension direction of the lifting arm 13 intersects the extension direction of the displacement compensation arm 14 at an angle, and the extension direction of the attitude adjustment arm 12 intersects the extension direction of the lifting arm 13 at an angle.

[0062] The lifting drive component 15 is installed between the displacement compensation arm 14 and the lifting arm 13 to control the lifting arm 13 to lift the end near the bearing seat 11. The lifting drive component 15 is installed at an angle for oblique pushing. The lifting drive component 15 is preferably an electric push rod. In actual installation, the tilt angle of the electric push rod relative to the horizontal is greater than the tilt angle of the lifting arm 13 relative to the horizontal plane. In this way, the pushing force of the electric push rod can be decomposed into the lifting force of the end of the lifting arm 13.

[0063] The displacement compensation arm 14 is provided with a first fixed shaft 17, and the lifting arm 13 is provided with a second fixed shaft 18. One of the first fixed shaft 17 and the second fixed shaft 14 is rotatably connected to the main body of the lifting drive component 15, and the other of the first fixed shaft 17 and the second fixed shaft 18 is rotatably connected to the drive rod of the lifting drive component 15.

[0064] Specifically, in this embodiment, the lifting drive component 15 is preferably an electric push rod. The main body of the electric push rod is penetrated by the first fixed shaft 17, and the main body of the electric push rod can rotate relative to the first fixed shaft 17. The end of the drive rod of the electric push rod is penetrated by the second fixed shaft 18, and the drive rod of the electric push rod can rotate relative to the second fixed shaft 18.

[0065] In addition, one end of the attitude adjustment arm 12 is hinged to the frame 10, and the other end is connected to the mounting base 16 and hinged to the end of the lifting arm 13. When the lifting drive 15 controls the lifting arm 13 to lift or lower, the attitude adjustment arm 12 can adjust the swing posture of the lifting arm 13 to ensure that the end of the lifting arm 13 near the bearing seat 11 is always in a horizontal state. In this way, when the lifting arm drives the bearing seat to lift or lower, the bearing seat 11 is always in a horizontal state and does not tilt.

[0066] Furthermore, refer to Figure 1 , Figure 3 , Figure 4 The mounting base 16 is provided with a first mounting part 161 and a second mounting part 162. A first rotating shaft 163 passes through the first mounting part 161, and a second rotating shaft 164 passes through the second mounting part 162. The ends of the lifting arm 13 and the attitude adjustment arm 12 are hinged to the first rotating shaft 163, and the lifting arm 13 and the displacement compensation arm 14 are hinged to the second rotating shaft 164. The hinge points of the first rotating shaft 163 and the second rotating shaft 164 with the lifting arm 13 do not coincide. In this embodiment, the hinge point of the first rotating shaft 163 with the lifting arm 13 is located at the end of the lifting arm 13, and the hinge point of the second rotating shaft 164 with the lifting arm 13 is located between the end point and the center point of the lifting arm 13.

[0067] In addition, the end of the lifting arm 13 away from the attitude adjustment arm 12 is hinged to the support seat 11, and the frame 10 is provided with a third rotating shaft 101 and a fourth rotating shaft 102. The end of the displacement compensation arm 14 away from the lifting arm 13 is hinged to the third rotating shaft 101, and the end of the attitude adjustment arm 12 away from the lifting arm 13 is hinged to the fourth rotating shaft 102.

[0068] The specific principle of the seat lifting structure in this application during actual use is as follows:

[0069] Reference Figure 1 , Figures 6 to 8When the support seat 11 rises, the drive rod of the lifting drive component 15 extends, controlling the lifting arm 13 to lift the end near the support seat 11. The displacement compensation arm 14 and attitude adjustment arm 12, which are hinged to it, also swing together. During operation, the support seat 11 is lifted continuously and gradually. Since the lifting drive component 15 uses an oblique pushing method, from a mechanical point of view, the pushing force of the lifting drive component 15 can be decomposed into horizontal thrust and longitudinal thrust. After the horizontal thrust is applied to the lifting arm 13, the lifting arm 13 will produce a horizontal extension displacement, which will inevitably cause the support seat 11 at the end of the lifting arm 13 to produce a horizontal displacement. At the same time, after the longitudinal thrust is applied to the lifting arm 13, the lifting arm 13 will produce a longitudinal lifting displacement, which will cause the lifting arm to move. The support seat 11 at the end of 13 generates a lifting displacement, thereby realizing the lifting action of the support seat 11. During the lifting process of the support seat 11, in order to reduce the horizontal movement of the support seat 11, a displacement compensation arm 14 is hinged between the frame 10 and the lifting arm 13. After the lifting drive 15 is pushed out, the displacement compensation arm 14 hinged with the lifting arm 13 will swing. The swing direction of the displacement compensation arm 14 is opposite to the horizontal movement direction of the lifting arm 13 and the support seat 11. During the swing of the displacement compensation arm 14 in the opposite direction, it can compensate for the horizontal displacement of the support seat 11, thereby reducing the horizontal movement of the support seat 11 during the lifting process. Similarly, when the lifting drive 15 drives the support seat 11 to descend, the displacement compensation arm 14 can also play the role of horizontal displacement compensation.

[0070] In addition, a first fixed shaft 17 is threaded through the displacement compensation arm 14, and a second fixed shaft 18 is threaded through the lifting arm 13. One of the first fixed shaft 17 and the second fixed shaft 14 is rotatably connected to the main body of the lifting drive component 15, and the other of the first fixed shaft 17 and the second fixed shaft 18 is rotatably connected to the drive rod of the lifting drive component 15. The first fixed shaft 17 and the second fixed shaft 18 are mainly used for the installation of the lifting drive component 15 (an electric push rod is used in this embodiment, which will not be described in detail below). After the first fixed shaft 17 and the second fixed shaft 18 are connected to both ends of the lifting drive component 15, the linkage between the displacement compensation arm 14 and the lifting arm 13 can be realized. Since both ends of the lifting drive component 15 are respectively connected to the first fixed shaft 17 and the second fixed shaft 18, the linkage between the displacement compensation arm 14 and the lifting arm 13 can be realized. The fixed shaft 18 is rotatably connected, which facilitates the lifting drive component 15 to adjust its own installation angle. Specifically, after the lifting drive component 15 is extended, the displacement compensation arm 14, which is hinged to the lifting arm 13, will swing. The swing direction of the displacement compensation arm 14 is opposite to the horizontal movement direction of the lifting arm 13 and the bearing seat 11. During the reverse swing of the displacement compensation arm 14, it will drive the lifting drive component 15 to swing in the opposite direction through the first fixed shaft 17. The lifting drive component 15 drives the lifting arm 13 to swing in the direction of the displacement compensation arm 14 through the connected second fixed shaft 18, thereby further realizing the horizontal displacement compensation function of the bearing seat 11 at the end of the lifting arm 13, thereby reducing the horizontal movement amplitude of the bearing seat 11 during the lifting process.

[0071] In this embodiment, the attitude adjustment arm 12, through its unique connection method and structural design, ensures that the lifting arm 13 maintains a stable swing posture during lifting, thereby keeping the support base 11 in a horizontal state at all times. Specifically, one end of the attitude adjustment arm 12 is hinged to the frame 10, the other end is hinged to the mounting base 16, and it is also hinged to the end of the lifting arm 13. This multi-hinge design allows the attitude adjustment arm 12 to fine-tune the swing posture of the lifting arm 13 during lifting.

[0072] When the lifting drive 15 pushes the lifting arm 13 to rise or fall, the lifting arm 13 will swing around its hinge point. The attitude adjustment arm 12 can sense the swing angle of the lifting arm 13 through its hinge point with the lifting arm 13, and adjust the attitude of the lifting arm 13 by its own swing.

[0073] The swing direction of the attitude adjustment arm 12 is opposite to that of the swing direction of the lifting arm 13. This reverse swing can counteract the tilting tendency of the lifting arm 13 during the lifting process, thereby ensuring that the end of the lifting arm 13 near the support seat 11 is always in a horizontal state.

[0074] In the design of this application, the length and angle of the attitude adjustment arm 12 were precisely calculated to ensure that during the lifting process, regardless of how the lifting arm 13 swings, the attitude adjustment arm 12 can compensate for the tilt angle of the lifting arm 13 through its own swing, so that the support seat 11 always remains horizontal. For example, when the lifting arm 13 tilts at a certain angle during the lifting process, the attitude adjustment arm 12 will adjust the end position of the lifting arm 13 through its swing, so that it returns to a horizontal state.

[0075] In addition, the attitude adjustment arm 12 is provided with a clearance part 121 to avoid collisions with other components (such as the first fixed shaft 17) during the swinging process, so as to ensure that the attitude adjustment arm 12 can swing smoothly.

[0076] Furthermore, the lifting drive component 15 (such as an electric push rod) drives the lifting arm 13 and the displacement compensation arm 14 in a diagonal pushing manner, and the specific principle is as follows:

[0077] Decomposition of oblique thrust: The pushing force of the lifting drive component 15 can be decomposed into horizontal thrust and longitudinal thrust. The horizontal thrust pushes the lifting arm 13 to produce horizontal displacement, and the longitudinal thrust pushes the lifting arm 13 to produce longitudinal lifting displacement.

[0078] Linkage mechanism: The two ends of the lifting drive component 15 are hinged to the displacement compensation arm 14 and the lifting arm 13, respectively. When the lifting drive component 15 is extended, the displacement compensation arm 14 and the lifting arm 13 swing simultaneously, realizing the lifting and horizontal displacement compensation of the bearing seat 11.

[0079] The displacement compensation arm 14 compensates for the horizontal displacement of the bearing seat 11 by swinging in the opposite direction to the lifting arm 13. The specific principle is as follows:

[0080] Swing compensation: When the lifting arm 13 produces horizontal displacement, the displacement compensation arm 14 offsets the horizontal displacement of the lifting arm 13 by swinging in the opposite direction, thereby reducing the horizontal movement amplitude of the bearing seat 11, or even controlling the horizontal movement amplitude of the bearing seat 11 to approach zero.

[0081] In addition, the displacement compensation arm 14 and the lifting arm 13 are hinged through the second pivot 164 to ensure that the two swing synchronously during the lifting process, thereby improving the stability of the seat lifting structure.

[0082] Furthermore, refer to Figure 4 , Figure 5Multiple sets of lifting arms 13 are provided, and adjacent lifting arms 13 are hinged together by a first connecting rocker arm 131; multiple sets of displacement compensation arms 14 are provided, and adjacent displacement compensation arms 14 are hinged together by a second connecting rocker arm 141. When the lifting drive component 15 controls the lifting of the support seat 11, the lifting arms 13 and their hinged displacement compensation arms 14 will also swing. Multiple sets of swinging lifting arms 13 are synchronized through the first connecting rocker arm 131, and multiple sets of swinging displacement compensation arms 14 are synchronized through the second connecting rocker arm 141. This can improve the overall strength of the entire seat lifting structure.

[0083] It should be noted that in this embodiment, there are two sets of lifting arms 13 and displacement compensation arms 14 on one side below the support seat 11. One lifting arm 13 and displacement compensation arm 14 are hinged together by the second rotating shaft 164, and the free end of the other lifting arm 13 and displacement compensation arm 14 is freely hinged together. This hinge point can be separated from the second rotating shaft 164. The advantage of this design is that the other lifting arm 13 and displacement compensation arm 14, which are hinged together after being separated from the second rotating shaft 164, have a large degree of rotational freedom.

[0084] Furthermore, the posture adjustment arm 12 is provided with a clearance part 121 corresponding to the first fixed shaft 17. The clearance part 121 is configured to prevent the posture adjustment arm 12 from contacting the first fixed shaft 17 during rotation. In this embodiment, the clearance part 121 is designed as an arc-shaped opening structure. During the lifting and lowering process of the entire seat lifting structure, the displacement compensation arm 14 swings, and the first fixed shaft 17 also swings along with it. The arc-shaped opening structure of the clearance part 121 can form a clearance space for the first fixed shaft 17, preventing the swinging first fixed shaft 17 from contacting the posture adjustment arm 12.

[0085] Furthermore, the lifting arms 13 are located on both sides of the lifting drive component 15, and each lifting arm 13 is equipped with a corresponding displacement compensation arm 14, which can improve the stability during the lifting process.

[0086] Furthermore, the seat lifting structure of this application is located on one side below the support seat 11, which can increase the space between the frame 10 and the support seat 11, and this space can be effectively utilized.

[0087] Example 2

[0088] Reference Figures 9 to 11 Based on the same technical concept, this application provides a personal transportation vehicle 200. Similar to existing personal transportation vehicles, the personal transportation vehicle 200 of this embodiment includes the seat lifting structure 100, seat 20 and wheel 21 in the above embodiment 1. At least one wheel 21 is equipped with an electric motor 22. The seat 20 is mounted on the support seat 11 of the seat lifting structure 100, and the wheel 21 is mounted on the frame 10 of the seat lifting structure 100.

[0089] The personal mobility vehicle 200 in this embodiment, due to the configuration of the aforementioned seat lifting structure 100, has the corresponding technical effects of the aforementioned seat lifting structure 100. When the seat lifting structure 100 controls the lifting of the seat 20 of the personal mobility vehicle 200, it can achieve stepless speed regulation, and the lifting is smooth without any jamming. In addition, during the lifting process of the seat 20, the personal mobility vehicle 200 has a front-to-back displacement compensation function and a seat tilt posture adjustment function. Moreover, the seat lifting structure 100 is installed on one side under the seat 20, and the usable space under the seat 20 is relatively large.

[0090] Reference Figure 12 When the seat 20 of the personal transportation vehicle 200 is raised by the seat lifting structure 100, the central axis of the seat 20 is S1. When the seat 20 is lowered by the seat lifting structure 100, the central axis of the seat 20 is S2. By comparison, it is found that the distance Δd between the central axis S1 and the central axis S2 is very small, indicating that the seat lifting structure 100 plays a good role in horizontal displacement compensation during the process of controlling the raising and lowering of the seat 20. The difference in front and back displacement of the seat 20 during the raising and lowering process is very small, resulting in a good user experience.

[0091] In summary, this application ensures that the bearing seat 11 remains horizontal during the lifting and lowering process by adjusting the posture adjustment arm 12 in real time; and reduces the horizontal movement of the bearing seat 11 during the lifting and lowering process by swinging the displacement compensation arm 14 in the opposite direction.

[0092] Multiple sets of lifting arms 13 and displacement compensation arms 14 achieve synchronous linkage through linked rocker arms, thereby improving the overall strength of the seat lifting structure.

[0093] The seat lifting structure 100 is located on one side below the support seat 11, increasing the available space between the frame 10 and the support seat 11; the lifting drive component 15 adopts stepless speed regulation, and the lifting process is smooth and continuous.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A seat lifting structure, comprising a frame (10), a support seat (11), and a lifting assembly installed between the frame (10) and the support seat (11); Its features are, One end of the lifting assembly is hinged to the frame (10), and the other end is connected to the support seat (11); The lifting assembly is equipped with a lifting drive (15), which can drive the lifting assembly to extend and retract, so that the support seat (11) can rise and fall relative to the frame (10). When the lifting assembly drives the support seat (11) to rise and fall, the lifting assembly can adjust the tilt posture of the support seat (11) during the lifting process so that the support seat (11) remains horizontal. When the lifting assembly drives the support seat (11) to rise and fall, the lifting assembly can compensate for the horizontal displacement of the support seat (11) during the lifting process, so as to reduce the horizontal movement of the support seat (11).

2. The seat lifting structure according to claim 1, characterized in that, The lifting assembly includes: An attitude adjustment arm (12) is connected at one end to the frame (10) and at the other end to the mounting base (16); The lifting arm (13) has one end connected to the attitude adjustment arm (12) via the mounting base (16) and the other end connected to the bearing base (11); The displacement compensation arm (14) is hinged at one end to the lifting arm (13) and at the other end to the frame (10); The lifting drive component (15) is installed between the displacement compensation arm (14) and the lifting arm (13). When the lifting drive component (15) drives the displacement compensation arm (14) and the lifting arm (13) to extend or retract relative to each other, the lifting arm (13) drives the support seat (11) to rise or fall. When the support seat (11) is raised and lowered, the attitude adjustment arm (12) can adjust the tilt attitude of the support seat (11) during the lifting and lowering process, so that the support seat (11) remains horizontal; Meanwhile, the displacement compensation arm (14) can compensate for the horizontal displacement of the bearing seat (11) during the lifting process, so as to reduce the horizontal movement of the bearing seat (11).

3. The seat lifting structure according to claim 2, characterized in that, The displacement compensation arm (14) is provided with a first fixed shaft (17), and the lifting arm (13) is provided with a second fixed shaft (18). One of the first fixed shaft (17) and the second fixed shaft (18) is rotatably connected to the main body of the lifting drive (15), and the other of the first fixed shaft (17) and the second fixed shaft (18) is rotatably connected to the drive rod of the lifting drive (15).

4. The seat lifting structure according to claim 3, characterized in that, When the lifting drive (15) pushes the lifting arm (13) to lift or lower, the lifting arm (13) swings around its hinge point. The attitude adjustment arm (12) can sense the swing angle of the lifting arm (13) through its hinge point with the lifting arm (13) and adjust the attitude of the lifting arm (13) by its own swing. The swing direction of the attitude adjustment arm (12) is opposite to that of the swing direction of the lifting arm (13). This reverse swing can counteract the tilting tendency of the lifting arm (13) during the lifting process. When the lifting drive (15) pushes the lifting arm (13) to lift or lower, the lifting arm (13) swings around its hinge point. When the lifting arm (13) generates a horizontal displacement, the displacement compensation arm (14) counteracts the horizontal displacement of the lifting arm (13) by swinging in the opposite direction.

5. The seat lifting structure according to claim 2, characterized in that, The mounting base (16) is provided with a first mounting part (161) and a second mounting part (162). A first rotating shaft (163) passes through the first mounting part (161), and a second rotating shaft (164) passes through the second mounting part (162). The lifting arm (13) and the attitude adjustment arm (12) are hinged to the first rotating shaft (163), and the lifting arm (13) and the displacement compensation arm (14) are hinged to the second rotating shaft (164); The ends of the lifting arm (13) and the attitude adjustment arm (12) are hinged to the first rotating shaft (163), and the end of the displacement compensation arm (14) is hinged to the second rotating shaft (164). The hinge points of the first rotating shaft (163) and the second rotating shaft (164) do not coincide with those of the lifting arm (13).

6. The seat lifting structure according to claim 5, characterized in that, The end of the lifting arm (13) away from the attitude adjustment arm (12) is hinged to the support seat (11). A third rotating shaft (101) and a fourth rotating shaft (102) are provided on the frame (10). The end of the displacement compensation arm (14) away from the lifting arm (13) is hinged to the third rotating shaft (101). The end of the attitude adjustment arm (12) away from the lifting arm (13) is hinged to the fourth rotating shaft (102).

7. The seat lifting structure according to claim 2, characterized in that, The lifting arm (13) is provided in multiple sets, and adjacent lifting arms (13) are hinged to each other by a first connecting rocker arm (131); Multiple sets of displacement compensation arms (14) are provided, and adjacent displacement compensation arms (14) are hinged together by a second linkage rocker arm (141).

8. The seat lifting structure according to claim 3, characterized in that, The attitude adjustment arm (12) is provided with a clearance part (121) corresponding to the first fixed shaft (17). The clearance part (121) is configured to prevent the attitude adjustment arm (12) from contacting the first fixed shaft (17) during rotation.

9. A personal transportation vehicle, characterized in that, Includes the seat lifting structure according to any one of claims 1-8.

10. The personal transportation vehicle according to claim 9, characterized in that, A seat (20) is mounted on the support (11), and a wheel (21) is mounted on the frame (10), at least one of the wheels (21) being equipped with an electric motor (22).

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