Chassis frame structure and scooter

Abstract

The utility model relates to a chassis frame structure and a scooter. The problem that in the prior art, front and rear wheels of the scooter are poor in damping stability is solved. The chassis frame structure comprises a chassis framework, a front supporting arm and a rear supporting arm, the front supporting arm is arranged at one end of the chassis framework and hinged to the chassis framework, the rear supporting arm is arranged at the other end of the chassis framework and fixedly connected with the chassis framework, and the hinged front supporting arm can rotate up and down relative to the chassis framework. The front supporting arms are connected with front wheel assemblies, and the rear supporting arms are connected with rear wheel assemblies. The supporting part of the avoiding frame of the structure is connected with the front supporting arm through the first suspension buffering assembly, the rear connecting arm is connected with the rear suspension arm through the second suspension buffering assembly, and the stability of the front supporting arm and the rear suspension arm in the damping and buffering process is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a chassis frame structure and a walking vehicle. BACKGROUND

[0002] The old walking vehicle is a walking tool specially designed for the old, which usually has a large seat, a comfortable suspension system and low-speed driving, so as to meet the safety and comfort needs of the old when going out.

[0003] The walking vehicle mainly comprises a chassis frame, wheels mounted on the chassis frame, the wheels being provided with an electric motor and a battery pack, and a damping assembly between the wheels and the chassis frame, which is crucial for the damping effect during driving. Through understanding of the related technology, a damping assembly for a walking vehicle and a walking vehicle with the same are disclosed in Chinese patent No. CN215323139U, which comprises a fork body, a damping seat, a damping guide rod and a damping elastic piece. The first end of the fork body is adapted to be connected with the wheel of the walking vehicle, the second end of the fork body is adapted to be pivotally connected with the frame of the walking vehicle, the damping seat is adapted to be pivotally connected with the frame, the damping seat has a guide hole, the first end of the damping guide rod is pivotally connected with the fork body, the second end of the damping guide rod passes through the guide hole and extends out of the guide hole, and the damping elastic piece is arranged between the second end of the damping guide rod and the damping seat.

[0004] Through understanding of the related technology, the damping assembly on the walking vehicle can achieve damping effect, but the stability of the damping of the front and rear wheels is not good enough. INVENTION CONTENTS

[0005] The utility model aims at providing a chassis frame structure and a walking vehicle to solve the above technical problems.

[0006] Therefore, the utility model provides a chassis frame structure, which comprises:

[0007] a chassis frame;

[0008] a front support arm arranged at one end of the chassis frame and hingedly connected with the chassis frame, the hingedly connected front support arm being able to rotate up and down relative to the chassis frame;

[0009] a rear support arm arranged at the other end of the chassis frame and fixedly connected with the chassis frame;

[0010] The front support arm is connected with a front wheel assembly, and the rear support arm is connected with a rear wheel assembly.

[0011] Further, the end of the chassis frame is provided with a fixed clamping plate, and the front support arm is hingedly connected with the fixed clamping plate through a pin shaft.

[0012] Further, the lifting mechanism is hinged on the chassis frame, the fixed clamping plate is fixedly provided with an avoiding frame, the avoiding frame is provided with an avoiding opening corresponding to the rotating arm of the lifting mechanism, and the avoiding opening is suitable for providing the rotating arm with an avoiding space required for rotation.

[0013] The avoiding opening is surrounded by two support portions and a fixed portion, and the fixed portion is fixed on the fixed clamping plate by a fixing piece.

[0014] Through the above technical scheme, in the process of unfolding and folding of the lifting mechanism where the rotating arm is located, the rotating arm will rotate, and in the process of large-angle swinging of the rotating arm, the end portion of the rotating arm can be introduced into the avoiding opening on the avoiding frame, and the avoiding space provided by the avoiding opening can further improve the rotation freedom of the rotating arm, so that the rotating arm is prevented from colliding with other components.

[0015] Further, the front wheel assembly comprises an electric motor arranged at the end portion of the front supporting arm and a front driving wheel connected with the electric motor.

[0016] The rear wheel assembly comprises a rear connecting arm fixedly connected with the rear supporting arm, a rear suspension arm hinged with the rear connecting arm, and a rear supporting wheel connected with the rear suspension arm through a rotating shaft.

[0017] Through the above technical scheme, the electric motor provides power for the front driving wheel, the electric motor and the front driving wheel are arranged at the end portion of the front supporting arm, and the rear supporting wheel is arranged at the end portion of the rear suspension arm. Since the front supporting arm is hinged with the chassis frame and the rear suspension arm is hinged with the rear connecting arm, when the front driving wheel and the rear supporting wheel collide with ground obstacles during driving, the front supporting arm and the rear suspension arm can freely swing up and down, so that the anti-shock free end in the up-and-down space of the front driving wheel and the rear supporting wheel is improved.

[0018] Further, the support portion of the avoiding frame is connected with the front supporting arm through a first suspension buffer assembly, and the rear connecting arm is connected with the rear suspension arm through a second suspension buffer assembly.

[0019] The first suspension buffer assembly comprises a first buffer connecting rod, a first supporting block, a first buffer spring and a first fastening sleeve. One end of the first buffer connecting rod is hinged with the support portion, and the other end thereof is hinged with the front supporting arm. The first buffer spring is sleeved on the first buffer connecting rod, one end of the first buffer spring is abutted against the first supporting block, and the other end thereof is abutted against the first fastening sleeve. The first fastening sleeve can move on the first buffer connecting rod to control the compression elastic force of the first buffer spring.

[0020] The second suspension buffer assembly includes a second buffer link, a second support block, a second buffer spring, and a second fastening sleeve. One end of the second buffer link is hinged to the rear connecting arm, and the other end is hinged to the rear suspension arm. The second buffer spring is sleeved on the second buffer link. One end of the second buffer spring abuts against the second support block, and the other end abuts against the second fastening sleeve. The second fastening sleeve can move on the second buffer link to control the compression force of the second buffer spring.

[0021] Specifically, after the first fastening sleeve is fitted onto the first buffer link, it can be connected to the first buffer link by a threaded connection. After the first fastening sleeve rotates on the first buffer link, it can control the compression of the first buffer spring, thereby achieving the purpose of adjusting the shock absorption strength of the first suspension buffer assembly. Similarly, after the second fastening sleeve is fitted onto the second buffer link, it can also be connected to the second buffer link by a threaded connection. After the second fastening sleeve rotates on the second buffer link, it can control the compression of the second buffer spring, thereby achieving the purpose of adjusting the shock absorption strength of the second suspension buffer assembly.

[0022] With the above technical solution, when the front drive wheel and the rear support wheel hit the ground obstacle during driving, the front support arm and the rear suspension arm can shake freely up and down. After the first suspension buffer component is installed, it can play a shock-absorbing role for the front support arm. Similarly, after the second suspension buffer component is installed, it can play a shock-absorbing role for the rear suspension arm.

[0023] Furthermore, the front support arm is hinged to both sides at one end of the chassis frame, and the rear support arm is fixedly connected to both sides at the other end of the chassis frame. After the front and rear support arms are connected to the chassis frame, they form an "I" shape. Although the front support arm is used to install the front drive wheel and the rear suspension arm is used to install the rear support wheel, there is still a difference in the installation method of the front support arm and the rear suspension arm. The front support arm is directly hinged to the chassis frame, while the rear suspension arm is hinged to the rear support arm fixedly installed on the chassis frame. The front support arm has a larger space for vertical vibration relative to the chassis frame. Moreover, the front support arm is provided with a mounting slot for mounting the electric motor. During the vertical vibration of the front support arm, the mounting slot can support the electric motor, which plays a greater supporting role for the electric motor and prevents the electric motor from becoming loose during vertical vibration.

[0024] Furthermore, the hinge points of the rear connecting arm and the rear suspension arm, the hinge points of the second buffer link and the rear connecting arm, and the hinge points of the second buffer link and the rear suspension arm are arranged in a triangular pattern. The triangular arrangement of the three hinge points can improve the stability of the rear suspension arm during the shock absorption process.

[0025] Similarly, the hinge point of the front support arm and the chassis frame, the hinge point of the first buffer connecting rod and the front support arm, and the hinge point of the first buffer connecting rod and the support part of the avoidance frame are arranged in a triangular arrangement, and the three hinge points are arranged in a triangular arrangement, which can improve the stability of the front support arm during the shock absorption and buffering process.

[0026] Further, the avoidance frame is provided with a support surface corresponding to the rotating arm, the support surface is located on one side of the avoidance opening, and the shape of the support surface is matched with the shape of the side surface of the rotating arm close to the avoidance opening.

[0027] Through the above technical solution, the lifting mechanism needs to be generally installed on the chassis frame, and the lifting mechanism is used to control the lifting of the upper bearing seat. During the large-angle swinging of the rotating arm of the lifting mechanism, when the end of the rotating arm is introduced into the avoidance opening, the support surface located on one side of the avoidance opening can support the side surface of the rotating arm. In the design, the shape of the support surface is matched with the shape of the side surface of the rotating arm, so that the support surface can stably support the rotating arm. In actual design, the smaller the angle of the support surface relative to the horizontal plane, the larger the angle at which the rotating arm can rotate. The angle of the support surface relative to the horizontal plane can be determined according to the angle of the actual stroke position of the rotating arm.

[0028] Further, the chassis frame is provided with a battery pack mounting part, one side of the battery pack mounting part is provided with a limiting piece, and the battery pack is installed in the battery pack mounting part. When the limiting piece is in the unfolded state, the disassembly path of the battery pack can be limited. When the limiting piece is in the folded or semi-folded state, the limiting state of the disassembly path of the battery pack is released.

[0029] Through the above technical solution, the battery pack is generally installed in the battery pack mounting part by the plug-in mode, preferably by the horizontal or inclined plug-in mode, which can reduce the risk of battery pack falling due to the loosening of the buckle to a certain extent. The advantage of the present application is that the limiting piece is arranged at the end of the battery pack mounting part. When the limiting piece is in the unfolded state, it is in the use state. When the limiting piece is in use, it blocks the disassembly path of the battery pack. Even if the fastening state of the battery pack is released, the battery pack cannot be pulled out of the battery pack mounting part. When the limiting piece is in the folded or semi-folded state, the limiting piece is basically in the idle state. The limiting piece does not block the disassembly path of the battery pack. At this time, the battery pack can be pulled out of the battery pack mounting part.

[0030] Further, the port of the battery pack mounting part is provided with a protective cover, and the limiting piece can limit the disassembly path of the protective cover when the limiting piece is in the unfolded state. When the limiting piece is in the folded or semi-folded state, the limiting state of the disassembly path of the protective cover is released.

[0031] Through the technical scheme, the protection cover can protect and limit the battery pack at the port of the battery pack mounting portion, and the limiting effect of the limiting member on the protection cover is the same as the limiting effect on the battery pack.

[0032] Further, the limiting member is a rotating pedal, which comprises a pedal body, a hinged arm connected to the pedal body, and an end of the hinged arm hinged to the battery pack mounting portion.

[0033] Through the technical scheme, the limiting member can be designed as a rotating pedal structure according to the actual use scene, the pedal body of the rotating pedal structure can rotate at the end of the battery pack mounting portion, the pedal body is in a horizontal state when the pedal body is in a use state, and the pedal body is in a vertical state when the pedal body is idle.

[0034] Further, when the pedal body is in an unfolded state, the surface of the pedal body is perpendicular to the side surface of the protection cover, and the disassembly path of the protection cover is limited, and the battery pack mounting portion or the battery pack is provided with a positioning buckle.

[0035] Further, when the pedal body is in a folded or half-folded state, the surface of the pedal body is parallel or intersects with the side surface of the protection cover, the hollow part on the pedal body forms an avoiding space on the disassembly path of the protection cover or the battery pack, and the limiting state of the disassembly path of the protection cover or the battery pack is released.

[0036] Compared with the prior art, the beneficial technical effects of the technical scheme of the utility model are as follows: 1. The chassis framework of the structure is hinged to the front support arm on one side and fixedly connected to the rear support arm on the other side, the support part of the avoiding frame is connected to the front support arm through the first suspension buffer assembly, the rear connecting arm is connected to the rear suspension arm through the second suspension buffer assembly, the first fastening sleeve of the first suspension buffer assembly is sleeved on the first buffer connecting rod, and can be connected with the first buffer connecting rod in a threaded manner, and after the first fastening sleeve rotates on the first buffer connecting rod, the compression amount of the first buffer spring can be controlled, so that the purpose of adjusting the shock absorption strength of the first suspension buffer assembly is achieved, and the second fastening sleeve of the second suspension buffer assembly is also sleeved on the second buffer connecting rod, and can be connected with the second buffer connecting rod in a threaded manner, and after the second fastening sleeve rotates on the second buffer connecting rod, the compression amount of the second buffer spring can be controlled, so that the purpose of adjusting the shock absorption strength of the second suspension buffer assembly is achieved.

[0037] 2. The hinge point of the rear connecting arm and the rear suspension arm, the hinge point of the second buffer connecting rod and the rear connecting arm, and the hinge point of the second buffer connecting rod and the rear suspension arm are arranged in a triangular arrangement; after the three hinge points are arranged in a triangular manner, the stability of the rear suspension arm during the shock absorption and buffering process can be improved; the hinge point of the front support arm and the chassis frame, the hinge point of the first buffer connecting rod and the front support arm, and the hinge point of the first buffer connecting rod and the support part of the avoidance frame are arranged in a triangular arrangement; after the three hinge points are arranged in a triangular manner, the stability of the front support arm during the shock absorption and buffering process can be improved;

[0038] 3. The end of the chassis frame is provided with a fixed clamping plate, the lifting mechanism is hinged on the chassis frame, the avoidance frame is fixedly installed on the fixed clamping plate, the avoidance frame is provided with an avoidance opening corresponding to the rotating arm of the lifting mechanism, the avoidance opening is suitable for providing the rotating arm with an avoidance space required for rotation, the avoidance space provided by the avoidance opening can further improve the rotation freedom of the rotating arm, and contact between the rotating arm and other components is avoided;

[0039] 4. The chassis frame is provided with a battery pack mounting portion, one side of the battery pack mounting portion is provided with a limiting piece, and the limiting piece can be designed as a rotating pedal structure according to an actual use scene; when the pedal main body is in a use state, the limiting piece is in a deployed state and can limit the disassembly path of the battery pack; when the limiting piece is in a folded or half-folded state, the limiting state of the disassembly path of the battery pack is released; under normal circumstances, the installed battery pack is positioned by a positioning buckle; on the basis of the positioning buckle, the limiting piece is designed; when the limiting piece is in a use state, even if the positioning buckle fails or loosens, the installed battery pack cannot be taken out from the battery pack mounting portion; the application plays a double-limiting role on the installed battery pack through the positioning buckle and the limiting piece, and the problem that the battery pack is accidentally dropped due to failure or loosening of the positioning buckle is well avoided.

[0040] In addition, the utility model provides a scooter, including above -mentioned chassis frame structure;

[0041] Further, the top of the lifting mechanism of the scooter is provided with a seat.

[0042] Compared with the prior art, the beneficial technical effects of the scooter with the chassis frame structure provided by the utility model are as described above, and will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0044] Figure 1 It is a schematic view of the chassis frame structure of the specific embodiment 1 of the present application.

[0045] Figure 2 It is a schematic view of the chassis frame structure of the specific embodiment 1 of the present application.

[0046] Figure 3 It is a schematic view of the chassis frame structure of the specific embodiment 1 of the present application.

[0047] Figure 4 It is a schematic view of the chassis frame structure of the specific embodiment 1 of the present application.

[0048] Figure 5 It is a schematic view of the chassis frame structure of the specific embodiment 1 of the present application. Figure 4 It is a sectional view along the line A-A.

[0049] Figure 6 It is a sectional view along the line B-B. Figure 4 It is a sectional view along the line B-B.

[0050] Figure 7 It is a sectional view along the line C-C. Figure 4 It is a sectional view along the line C-C.

[0051] Figure 8 It is a schematic view of the specific embodiment 1 of the present application after the limiting piece is folded.

[0052] Figure 9 It is a schematic view of the specific embodiment 1 of the present application after the limiting piece is folded.

[0053] The figure mark explanation: 100, chassis frame structure; 10, chassis skeleton; 11, front support arm; 12, rear support arm; 13, fixed clamping plate; 14, guide support wheel; 15, avoiding frame; 150, support surface; 16, avoiding port; 17, support part; 18, fixed part; 19, placement station slot;

[0054] 101, battery pack mounting part; 102, limiting piece; 1021, pedal main body; 1022, hinged arm; 1023, hollow part; 103, battery pack; 104, positioning buckle; 105, protection cover;

[0055] 200, front wheel assembly; 20, electric motor; 21, front drive wheel;

[0056] 300. Rear wheel assembly; 30. Rear connecting arm; 31. Rear suspension arm; 32. Rear support wheel;

[0057] 400. Lifting mechanism; 40. Rotating arm;

[0058] 500. First suspension buffer assembly; 50. First buffer link; 51. First support block; 52. First buffer spring; 53. First fastening sleeve;

[0059] 600. Second suspension buffer assembly; 60. Second buffer link; 61. Second support block; 62. Second buffer spring; 63. Second fastening sleeve.

[0060] 1000, transportation vehicles; 700, seats. Detailed Implementation

[0061] 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.

[0062] Example 1

[0063] Reference Figure 1 , Figure 2 A chassis frame structure 100 includes a chassis frame 10, a front support arm 11 disposed at one end of the chassis frame 10 and hinged to the chassis frame 10, and a rear support arm 12 disposed at the other end of the chassis frame 10 and fixedly connected to the chassis frame 10. The hinged front support arm 11 can rotate up and down relative to the chassis frame 10. The front support arm 10 is connected to the front wheel assembly 200, and the rear support arm 12 is connected to the rear wheel assembly 300.

[0064] Specifically, the front support arm 11 is hinged to both sides of one end of the chassis frame 10, and the rear support arm 12 is fixedly connected to both sides of the other end of the chassis frame 10. After the front support arm 11 and the rear support arm 12 are connected to the chassis frame 10, they form an "I" shape.

[0065] Furthermore, the end of the chassis frame 10 is provided with a fixed clamping plate 13, and the front support arm 11 is hinged to the fixed clamping plate 13 by a pin 14. A guide support wheel 14 is provided on one side of the fixed clamping plate 13. The main function of the guide support wheel 14 is to provide stable support and guidance during the movement of the front wheel assembly 200 and the rear wheel assembly 300.

[0066] Reference Figures 4-7The front wheel assembly 200 comprises an electric motor 20 arranged at the end of the front support arm 10, and a front driving wheel 21 connected with the electric motor 20.

[0067] The rear wheel assembly 300 comprises a rear connecting arm 30 fixedly connected with the rear support arm 12, a rear suspension arm 31 hingedly connected with the rear connecting arm 30, and a rear support wheel 32 connected with the rear suspension arm 31 through a rotating shaft.

[0068] The electric motor 20 provides power for the front driving wheel 21, the electric motor 20 and the front driving wheel 21 are installed at the end of the front support arm 11, and the rear support wheel 32 is installed at the end of the rear suspension arm 31. Since the front support arm 11 is hingedly connected with the chassis frame 10, and the rear suspension arm 31 is hingedly connected with the rear connecting arm 30, when the front driving wheel 21 and the rear support wheel 32 touch the ground obstacles during driving, the front support arm 11 and the rear suspension arm 31 can freely swing up and down, so as to improve the anti-shock free end in the up-and-down space of the front driving wheel 21 and the rear support wheel 32.

[0069] Further, referring to Figure 3 The chassis frame 10 is hingedly connected with a lifting mechanism 400, and the fixed clamping plate 13 is fixedly installed with an avoiding frame 15, the avoiding frame 15 is provided with an avoiding opening 16 corresponding to a rotating arm 40 of the lifting mechanism 400, and the avoiding opening 16 is adapted to provide the rotating arm 40 with an avoiding space required for rotation.

[0070] The avoiding opening 16 is surrounded by two support portions 17 and a fixed portion 18, and the fixed portion 18 is fixed on the fixed clamping plate 13 by a fixing member, wherein the support portion 17 and the fixed portion 18 can be integrally formed.

[0071] During the unfolding and folding of the lifting mechanism 400 where the rotating arm 40 is located, the rotating arm 40 will rotate, and during the large-angle swinging of the rotating arm 40, the end of the rotating arm 40 can be introduced into the avoiding opening 16 of the avoiding frame 15, and the avoiding space provided by the avoiding opening 16 can further improve the rotation freedom of the rotating arm 40, so as to avoid the rotating arm 40 from colliding with other components.

[0072] Referring to Figure 1 , Figure 2 The support portion 17 of the avoiding frame 15 is connected with the front support arm 11 through a first suspension buffer assembly 500, and the rear connecting arm 30 is connected with the rear suspension arm 31 through a second suspension buffer assembly 600.

[0073] When the front driving wheel 21 and the rear supporting wheel 32 touch the ground obstacles during driving, the front supporting arm 11 and the rear suspension arm 31 can freely shake up and down, after the first suspension buffer assembly 500 is installed, the first suspension buffer assembly 500 can play a role of shock absorption for the front supporting arm 11, and the second suspension buffer assembly 600 can play a role of shock absorption for the rear suspension arm 31 in the same way.

[0074] The first suspension buffer assembly 500 includes a first buffer connecting rod 50, a first supporting block 51, a first buffer spring 52 and a first fastening sleeve 53, one end of the first buffer connecting rod 50 is hinged with the supporting part 17, the other end is hinged with the front supporting arm 11, the first buffer spring 52 is sleeved on the first buffer connecting rod 50, one end of the first buffer spring 52 is in contact with the first supporting block 51, the other end is in contact with the first fastening sleeve 53, the first fastening sleeve 53 can move on the first buffer connecting rod 50 to control the compression elastic force of the first buffer spring 52;

[0075] The second suspension buffer assembly 600 includes a second buffer connecting rod 60, a second supporting block 61, a second buffer spring 62 and a second fastening sleeve 63, one end of the second buffer connecting rod 60 is hinged with the rear connecting arm 30, the other end is hinged with the rear suspension arm 31, the second buffer spring 62 is sleeved on the second buffer connecting rod 60, one end of the second buffer spring 62 is in contact with the second supporting block 61, the other end is in contact with the second fastening sleeve 63, the second fastening sleeve 63 can move on the second buffer connecting rod 60 to control the compression elastic force of the second buffer spring 62;

[0076] Specifically, after the first fastening sleeve 53 is sleeved on the first buffer connecting rod 50, the first fastening sleeve 53 can be connected with the first buffer connecting rod 50 in a threaded manner, after the first fastening sleeve 53 rotates on the first buffer connecting rod 50, the compression amount of the first buffer spring 52 can be controlled, so as to achieve the purpose of adjusting the shock absorption strength of the first suspension buffer assembly 500, in the same way, after the second fastening sleeve 63 is sleeved on the second buffer connecting rod 60, the second fastening sleeve 63 can also be connected with the second buffer connecting rod 60 in a threaded manner, after the second fastening sleeve 63 rotates on the second buffer connecting rod 60, the compression amount of the second buffer spring 62 can be controlled, so as to achieve the purpose of adjusting the shock absorption strength of the second suspension buffer assembly 600.

[0077] It should be noted that although the front support arm 11 is used to install the front drive wheel 21, and the rear suspension arm 31 is used to install the rear support wheel 32, the mounting methods of the front support arm 11 and the rear suspension arm 31 are different. The front support arm 11 is directly hinged with the chassis frame 10, and the rear suspension arm 31 is hinged with the rear support arm 12 fixedly installed on the chassis frame 10. The space for the front support arm 11 to shake up and down relative to the chassis frame 10 is larger. Moreover, the front support arm 10 is provided with a mounting station groove 19 for accommodating the electric motor 20. During the shaking process of the front support arm 11, the mounting station groove 19 can hold the electric motor 20, which can greatly support the electric motor 20 and prevent the electric motor 20 from loosening during the shaking process.

[0078] Further, in some embodiments, the hinging points of the rear connecting arm 30 and the rear suspension arm 31, the hinging points of the second buffer connecting rod 60 and the rear connecting arm 30, and the hinging points of the second buffer connecting rod 60 and the rear suspension arm 31 are arranged in a triangular manner. After the three hinging points are arranged in a triangular manner, the stability of the rear suspension arm 31 during the shock absorption process can be improved.

[0079] Similarly, the hinging points of the front support arm 11 and the chassis frame 10, the hinging points of the first buffer connecting rod 50 and the front support arm 11, and the hinging points of the first buffer connecting rod 50 and the support part 17 of the avoidance frame are arranged in a triangular manner. After the three hinging points are arranged in a triangular manner, the stability of the front support arm 11 during the shock absorption process can be improved.

[0080] Further, referring to Figure 2 , the avoidance frame 15 is provided with a support surface 150 corresponding to the rotating arm 40. The support surface 150 is located on one side of the avoidance opening 16, and the shape of the support surface 150 is adapted to the shape of the side surface of the rotating arm 40 close to the avoidance opening 16.

[0081] The chassis frame 10 generally needs to be installed with a lifting mechanism 400 for controlling the lifting of the upper bearing seat 41. During the large-angle swinging process of the rotating arm 40 of the lifting mechanism 400, when the end part of the rotating arm 40 is introduced into the avoidance opening 16, the support surface 150 located on one side of the avoidance opening 16 can support the side surface of the rotating arm 40. In the design, the shape of the support surface 150 is adapted to the shape of the side surface of the rotating arm 40, which can ensure that the support surface 150 can stably support the rotating arm 40. In actual design, the smaller the angle of the support surface 150 relative to the horizontal plane, the larger the angle at which the rotating arm 40 can rotate. The angle of the support surface 150 relative to the horizontal plane can be determined according to the angle of the key position of the actual stroke of the rotating arm 40.

[0082] Further, referring to Figure 2 , Figure 5 , Figure 8The chassis frame 10 is provided with a battery pack mounting portion 101, one side of the battery pack mounting portion 101 is provided with a limiting piece 102, the battery pack mounting portion 101 is mounted with a battery pack 103, when the limiting piece 102 is in an unfolded state, the disassembly path of the battery pack 103 can be limited, when the limiting piece 102 is in a folded or semi-folded state, the limiting state of the disassembly path of the battery pack 103 is released; and the battery pack mounting portion 101 or the battery pack 103 is provided with a positioning buckle 104.

[0083] The battery pack 103 is generally installed in the battery pack mounting portion 101 by plugging and pulling, preferably by horizontal or inclined plugging and pulling, which can reduce the risk of the battery pack 103 falling due to the buckle loosening to a certain extent, and the advantage of the application is that the battery pack mounting portion end 101 is provided with a limiting piece 102, when the limiting piece 102 is in an unfolded state, it is in a use state, and when the limiting piece 102 is in use, it blocks the disassembly path of the battery pack 103, so that the battery pack 103 cannot be pulled out from the battery pack mounting portion 101 even if the engagement state of the positioning buckle 104 is released, and when the limiting piece 102 is in a folded or semi-folded state, the limiting piece 102 is basically in an idle state, and the limiting piece 102 does not block the disassembly path of the battery pack 103, so that the battery pack 103 can be pulled out from the battery pack mounting portion 101.

[0084] Further, the port of the battery pack mounting portion 101 is provided with a protective cover 105, when the limiting piece 102 is in an unfolded state, the disassembly path of the protective cover 105 can be limited, when the limiting piece 102 is in a folded or semi-folded state, the limiting state of the disassembly path of the protective cover 105 is released, wherein the protective cover 105 can protect and limit the battery pack 103 at the port of the battery pack mounting portion 101, and the limiting effect of the limiting piece 102 on the protective cover 105 is the same as the limiting effect on the battery pack.

[0085] The limiting piece 102 can be designed as a rotating pedal structure according to the actual use scene, the rotating pedal structure includes a pedal body 1021, a hinged arm 1022 connected with the pedal body 1021, and an end of the hinged arm 1022 is hinged with the battery pack mounting portion 101, wherein the pedal body 1021 is provided with a hollow portion 1023, when the pedal body 1021 is in a use state, the pedal body 1021 is rotated and in a horizontal state, and when the pedal body 1021 is idle, the pedal body 1021 is rotated and in a vertical state.

[0086] Specifically, when the pedal body 1021 is in the unfolded state, the surface of the pedal body 1021 is perpendicular to the side of the protective cover 105, and at the same time, the disassembly path of the protective cover 105 is limited; when the pedal body 1021 is in the folded or semi-folded state, the surface of the pedal body 1021 is parallel or intersects with the side of the protective cover 105, the hollow part 1023 on the pedal body 1021 forms an avoidance space on the disassembly path of the protective cover 105 or the battery pack 103, and the limiting state of the disassembly path of the protective cover 105 or the battery pack 103 is released.

[0087] For the design of the limiting piece 102 at the end of the battery pack 103, under normal circumstances, the installed battery pack 103 is positioned by the positioning buckle 104, and the limiting piece 102 is designed on the basis of the positioning buckle 104 in the application. Even if the positioning buckle 104 fails or loosens, the installed battery pack 103 cannot be taken out from the battery pack mounting part 101 when the limiting piece 102 is in use. The application is equivalent to playing a double limiting role on the installed battery pack 103 through the positioning buckle 104 and the limiting piece 102, which well avoids the problem of accidental falling of the battery pack caused by the failure and loosening of the positioning buckle.

[0088] Embodiment 2

[0089] Reference Figure 9 Based on the same technical concept, the application embodiment provides a scooter 1000, which includes the chassis frame structure 100, the front wheel assembly 200, the rear wheel assembly 300, the lifting mechanism 400, the first suspension buffer assembly 500, the second suspension buffer assembly 600, and the related installation structure of the battery pack 103 in the above-mentioned embodiment 1. Moreover, it also includes a seat 700 arranged on the top of the lifting mechanism 400. The scooter 1000 has the related functions of the chassis frame structure 100, the first suspension buffer assembly 500, and the second suspension buffer assembly 600 in the above-mentioned embodiment 1. At the same time, the installed battery pack 103 also has the double limiting functions of the positioning buckle 104 and the limiting piece 102.

[0090] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A chassis frame structure, characterized by, The utility model relates to a kind of electric wheelchairs, including: Chassis frame (10); Front support arm (11) is arranged at one end of the chassis frame (10) and is connected with the chassis frame (10); Rear support arm (12) is arranged at the other end of the chassis frame (10) and is fixedly connected with the chassis frame (10); Wherein, the front support arm (11) connects front wheel assembly (200), and the rear support arm (12) connects rear wheel assembly (300).

2. The chassis frame structure of claim 1, wherein, The end of the chassis frame (10) is provided with a fixed clamping plate (13), and the front support arm (11) is hinged with the fixed clamping plate (13) through a pin shaft.

3. The chassis frame structure of claim 2, wherein, The lifting mechanism (400) is hinged on the chassis frame (10), the fixed clamping plate (13) is fixedly installed with an avoidance frame (15), the avoidance frame (15) is provided with an avoidance opening (16) corresponding to the rotating arm (40) of the lifting mechanism (400), and the avoidance opening (16) is suitable for providing the avoidance space required for rotation of the rotating arm (40); The avoidance opening (16) is surrounded by two support parts (17) and a fixed part (18), and the fixed part (18) is fixed on the fixed clamping plate (13) by a fixing member.

4. The chassis frame structure of claim 3, wherein The front wheel assembly (200) includes an electric motor (20) arranged at the end of the front support arm (11), and a front drive wheel (21) connected with the electric motor (20); The rear wheel assembly (300) includes a rear connecting arm (30) fixedly connected with the rear support arm (12), a rear suspension arm (31) hinged with the rear connecting arm (30), and a rear support wheel (32) connected with the rear suspension arm (31) through a rotating shaft.

5. The chassis frame structure of claim 4, wherein, The support part (17) of the avoidance frame (15) is connected with the front support arm (11) through a first suspension buffer assembly (500), and the rear connecting arm (30) is connected with the rear suspension arm (31) through a second suspension buffer assembly (600); Wherein, the first suspension buffer assembly (500) includes a first buffer connecting rod (50), a first support block (51), a first buffer spring (52) and a first fastening sleeve (53), one end of the first buffer connecting rod (50) is hinged with the support part (17), the other end is hinged with the front support arm (11), the first buffer spring (52) is sleeved on the first buffer connecting rod (50), one end of the first buffer spring (52) is in contact with the first support block (51), and the other end is in contact with the first fastening sleeve (53), and the first fastening sleeve (53) can move on the first buffer connecting rod (50) to control the compression elastic force of the first buffer spring (52); The second suspension buffer assembly (600) comprises a second buffer connecting rod (60), a second support block (61), a second buffer spring (62) and a second fastening sleeve (63), one end of the second buffer connecting rod (60) is hinged with the rear connecting arm (30), the other end is hinged with the rear suspension arm (31), the second buffer spring (62) is sleeved on the second buffer connecting rod (60), one end of the second buffer spring (62) is in contact with the second support block (61), the other end is in contact with the second fastening sleeve (63), and the second fastening sleeve (63) can move on the second buffer connecting rod (60) to control the compression elastic force of the second buffer spring (62).

6. The chassis frame structure of claim 3, wherein The avoiding frame (15) is provided with a supporting surface (150) corresponding to the rotating arm (40), the supporting surface (150) is located on one side of the avoiding opening (16), and the shape of the supporting surface (150) is matched with the shape of the side surface of the rotating arm (40) close to the avoiding opening (16).

7. The chassis frame structure of claim 3, wherein The bottom plate framework (10) is provided with a battery pack (103) mounting portion (101), one side of the battery pack (103) mounting portion (101) is provided with a limiting piece (102), the battery pack (103) is mounted in the battery pack (103) mounting portion (101), when the limiting piece (102) is in an unfolded state, the disassembly path of the battery pack (103) can be limited, and when the limiting piece (102) is in a folded or semi-folded state, the limiting state of the disassembly path of the battery pack (103) is released.

8. The chassis frame structure of claim 7, wherein, The port of the battery pack (103) mounting portion (101) is provided with a protective cover (105), when the limiting piece (102) is in an unfolded state, the disassembly path of the protective cover (105) can be limited, and when the limiting piece (102) is in a folded or semi-folded state, the limiting state of the disassembly path of the protective cover (105) is released.

9. The chassis frame structure of claim 8, wherein, The limiting piece (102) is a rotating pedal, the rotating pedal comprises a pedal main body (1021) and a hinged arm (1022) connected with the pedal main body (1021), the end of the hinged arm (1022) is hinged with the battery pack (103) mounting portion (101), wherein the pedal main body (1021) is provided with a hollow portion (1023).

10. The chassis frame structure of claim 9, wherein, When the pedal main body (1021) is in an unfolded state, the surface of the pedal main body (1021) is perpendicular to the side surface of the protective cover (105), and the disassembly path of the protective cover (105) is limited; the battery pack (103) mounting portion (101) or the battery pack (103) is provided with a positioning buckle (104).

11. A mobility vehicle characterized by, The bottom plate frame structure of any one of claims 1-10 is included. The bottom plate frame structure of any one of claims 1-10 is included.

Images