Four-wheel scooter with multi-angle turning inclined structure

Abstract

The invention relates to the technical field of scooter devices, in particular to a four-wheel scooter with a multi-angle turning inclined structure. The scooter comprises a front frame, a push rod penetrates through the inner end of the front frame, and one end away from the push rod is fixedly connected with a bottom plate. The left side and the right side of the bottom plate are each provided with two pulleys, and a rear frame is rotationally installed at the end, away from the front frame, of the bottom plate. A turnover frame is arranged above the bottom plate, and a pedal is fixedly installed on the outer surface of the turnover frame. By arranging a linkage structure of the left limiting ring, the right limiting ring and the traction rods, when the lantern rings transversely move, the limiting rings on the corresponding sides can be driven to drive the traction rods to move in the opposite directions, and therefore synchronous rotation of the guide plates is achieved; and the rear axle is driven to synchronously rotate along with the inclination angle of the pedal, so that pulleys on the rear axle are always kept in full contact with the ground, and the phenomenon that wheels are suspended or unstable is effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of scooter devices, in particular to a four-wheel scooter with a multi-angle turning and tilting structure. Background Art

[0002] As a short-distance transportation tool with a simple structure and flexible operation, scooters are widely used in fields such as children's entertainment, youth transportation, and personalized travel. Existing four-wheeled scooters generally include basic components such as pedals, wheels, steering structure, and brake device. Among them, the steering method is mainly achieved by adjusting the direction of the front wheel or the side tilt of the vehicle body. However, the steering structures in the existing technology are mostly fixed-axis or single-angle swing structures, which cannot meet the user's demand for flexible control at different speeds or different turning radii.

[0003] After searching, it was found that the prior art publication number is CN210391430U, which discloses a multifunctional four-wheeled scooter, relating to the technical field of scooters, including a four-wheeled scooter body, a handle welded at one end of the four-wheeled scooter body, and an upward arc-shaped structure at the other end, a threaded hole is provided on the upper surface of the four-wheeled scooter body, and a support rod is threadedly connected to the threaded hole, a slide groove is provided on the peripheral side of the support rod, and a support seat is connected to the peripheral side of the support rod through a sliding sleeve, a sponge pad is glued to the upper surface of the support seat, an armrest is welded at one end of the support rod, and a water gun is installed on one side of the armrest, two connecting rods are arranged on both sides of the four-wheeled scooter body, and one end of each connecting rod is provided with an auxiliary wheel. This scheme realizes a four-wheeled scooter that is safe and easy for children to use through the arrangement of armrests and support seats.

[0004] Therefore, based on the above search and in combination with existing technologies, the rear axle structure of some existing scooters is fixed or has only a single-direction rotation function, and cannot be adjusted in a linked manner according to the inclination angle of the pedal, resulting in the rear wheel may not be able to maintain sufficient contact with the ground during turning, and the wheel is prone to hanging or instability. In addition, the front axle support structure of the scooter is mostly rigidly connected and lacks a tilt compensation mechanism, resulting in the angle between the front axle pulleys being unable to automatically adjust with the posture of the vehicle body during turning, thereby affecting the ground contact of the pulleys, resulting in poor lateral support force, which can easily cause the vehicle body to slip, deflect or even roll over in sharp turns or complex terrain conditions. For this reason, the present application proposes a four-wheeled scooter with a multi-angle turning and tilting structure. Summary of the Invention

[0005] The object of the present invention is to provide a four-wheeled scooter with a multi-angle turning and tilting structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a four-wheeled scooter with a multi-angle turning and tilting structure, comprising a front frame, a push rod is passed through the inner end of the front frame, and a handle is fixedly installed on the end of the push rod away from the front frame, which is convenient for the user to control, the front frame is fixedly connected to the bottom plate at one end away from the push rod, two pulleys are provided on the left and right sides of the bottom plate, a rear frame is rotatably mounted on the end of the bottom plate away from the front frame, a flip frame is provided above the bottom plate, and a pedal is fixedly mounted on the outer surface of the flip frame for the user to step on, a rear axle is rotatably mounted on the inner end of the rear frame, and the rear axle is rotatably connected to the two pulleys located on the right side of the bottom plate, the front axle is mounted on the bottom end of the push rod, and the front axle is rotatably connected to the two pulleys located on the left side of the bottom plate.

[0007] As a further solution of the present invention, a guide plate is fixedly installed on the inner end of the rear frame, and the guide plate is located at the center of the rear frame, an output rod is fixedly installed on the inner end of the flip frame, a spiral groove is provided on the outer surface of the output rod, and a movable sleeve is sleeved on the outer surface of the output rod, a protrusion is fixedly installed on the inner end of the movable sleeve, the protrusion is inserted into the interior of the spiral groove, the outer surface of the movable sleeve is slidably connected to the bottom plate, and when the output rod rotates, its spiral groove drives the movable sleeve to reciprocate by cooperating with the protrusion.

[0008] As a further solution of the present invention, the bottom end of the pedal is fixedly connected to two guide cylinders, and a traction rod is passed through the interior of the guide cylinder. The traction rod is movably connected to the guide plate at one end away from the movable sleeve. The outer surface of the output rod is sleeved with a synchronous cylinder, and the synchronous cylinder is rotatably connected to the movable sleeve. Two rings are fixedly installed on the outer surface of the synchronous cylinder, and the rings are sleeved on the outer surface of the traction rod.

[0009] As a further solution of the present invention, a guide groove is provided on the outer surface of the output rod, a traction belt is passed through the inner end of the front frame, the end of the traction belt is fixedly connected to a movable cylinder, and the movable cylinder is located inside the front frame, and the end of the movable cylinder away from the traction belt is fixedly connected to a passive sleeve, and the passive sleeve is slidably connected to the inner end of the front frame.

[0010] As a further solution of the present invention, the inner end of the movable cylinder is fixedly connected with a locking sleeve, the inner end of the passive sleeve is passed through a movable tube, the end of the movable tube away from the output rod is passed through the interior of the locking sleeve, and the end of the movable tube away from the locking sleeve is fixedly connected to the passive rod, and the outer surface of the passive rod is fixedly installed with a convex rod, which is inserted into the guide groove and can slide or guide the guide groove to position. By arranging the passive rod and the convex rod structure matched with the locking sleeve, the movable tube and the guide groove, stable guiding and limiting of the passive sleeve are achieved, ensuring its smooth movement during operation and improving the reliability and service life of the device.

[0011] As a further solution of the present invention, a locking ring is provided on the outer surface of the locking sleeve, a plurality of clamping plates are provided at one end of the locking sleeve close to the movable tube, a clamping groove is provided on the outer surface of the movable tube, the clamping plates and the clamping groove are engaged with each other, a support rod is fixedly installed on the inner end of the front frame, an output pipe is fixedly installed on the outer surface of the support rod, the output pipe is located inside the support rod, a movable tube is passed through the outer surface of the output pipe, and the movable tube corresponds to the locking ring.

[0012] As a further solution of the present invention, a pressure cylinder is fixedly installed on the inner end of the push rod, the output end of the pressure cylinder is fixedly connected to a pressure tube, and the free end of the pressure tube is fixedly connected to the output tube, the inner end of the pressure cylinder is passed through a movable sleeve, and the bottom end of the movable sleeve is fixedly connected to a movable plug. By arranging the pressure cylinder, the pressure tube and the internal movable sleeve and movable plug structure, effective transmission and regulation of pressure are achieved, the stability of thrust output is enhanced, and the working efficiency and adaptability of the device are improved.

[0013] As a further solution of the present invention, two bridge frames are rotatably installed on the outer surface of the front axle, two pulleys located on the left side of the base plate are rotatably connected to the bridge frames, and a limit shell is fixedly installed on the inner end of the front axle.

[0014] As a further solution of the present invention, two traction plates are slidably installed on the inner end of the limit shell, and one end of the traction plate is rotatably connected to the bridge frame, and the connection point deviates from the rotation center of the bridge frame, and the two traction plates are connected to the traction belt through a connecting piece.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention provides a linkage structure between left and right limiting rings and the traction rod. When the collar moves laterally, it can drive the limiting ring on the corresponding side to drive the traction rod to move in the same direction, thereby achieving synchronous rotation of the guide plate, and then driving the rear axle to rotate synchronously with the inclination angle of the pedal. This ensures that the pulley on the rear axle always maintains full contact with the ground, effectively preventing the occurrence of wheel hanging or instability, and significantly improving the stability and safety of the scooter during cornering.

[0017] 2. The present invention uses a traction belt and a connecting piece to drive the two traction plates to move toward each other, causing the bridge structure to tilt around its rotational connection with the front axle, thereby adjusting the angle of the front axle pulley to achieve an adaptive fit of the pulley to the ground. This structure can provide stronger lateral support and anti-rollover performance during the scooter's steering process, thereby improving overall controllability and riding safety, and is particularly suitable for complex terrain or sharp turns. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The schematic diagram of the structure of a four-wheeled scooter with a multi-angle turning and tilting structure;

[0019] Figure 2 This is a disassembled diagram of a four-wheel scooter;

[0020] Figure 3 This is a disassembled diagram of the pedals of a four-wheel scooter;

[0021] Figure 4 This is the disassembly diagram of the rear rack and flip rack;

[0022] Figure 5 Schematic diagram of the internal structure of the flip frame;

[0023] Figure 6 Schematic diagram of the internal structure of the front frame;

[0024] Figure 7 Schematic diagram of the structure inside the passive sleeve;

[0025] Figure 8 Schematic diagram of the structure inside the movable tube;

[0026] Figure 9 Schematic diagram of the internal structure of the push rod;

[0027] Figure 10 Schematic diagram of the internal structure of the pressure cylinder;

[0028] Figure 11 This is the disassembled diagram of the front axle;

[0029] Figure 12 This is the disassembled diagram of the interior of the front axle;

[0030] Figure 13 This is a simplified diagram of the deflection state of the front axle pulley of a four-wheel scooter.

[0031] In the figure: 1, pedal; 2, push rod; 3, front frame; 4, pulley; 5, bottom plate;

[0032] 101. Pressure tube; 102. Adjustment knob; 103. Pressure cylinder; 104. Drive gear; 105. Crown gear; 106. Screw; 107. Movable sleeve; 108. Movable plug;

[0033] 201, rear frame; 202, brake plate; 203, rear axle; 204, guide plate; 205, damping spring; 206, insert;

[0034] 301, front axle; 302, traction belt; 303, movable cylinder; 304, passive sleeve; 305, movable tube; 306, support rod; 307, passive rod; 308, output tube; 309, locking ring; 310, locking sleeve; 311, return spring; 312, unlocking lever; 313, bridge frame; 314, limit housing; 315, connector; 316, traction plate;

[0035] 401. Turning frame; 402. Movable sleeve; 403. Guide cylinder; 404. Drawbar; 405. Limiting ring; 406. Synchronizing cylinder; 407. Output rod; 408. Stabilizing ring; 409. Guide groove. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Example 1: Please refer to Figure 1 -

[0038] Figure 4 , a four-wheeled scooter with a multi-angle turning and tilting structure, including a front frame 3, a push rod 2 is passed through the inner end of the front frame 3, and a handle is fixedly installed on the end of the push rod 2 away from the front frame 3 by bolts, so that the user can better control it. The end of the front frame 3 away from the push rod 2 is fixedly connected to the bottom plate 5 by bolts, and two pulleys 4 are provided on the left and right sides of the bottom plate 5. The two pulleys 4 on the left are located below the front frame 3, and the two pulleys 4 on the right are located on the right side of the bottom plate 5. The end of the bottom plate 5 away from the front frame 3 is rotatably mounted with a rear frame 201 through a rotating shaft. A turnover frame 401 is provided above the bottom plate 5, and a pedal 1 is fixedly installed on the outer surface of the turnover frame 401 by bolts for the convenience of the user to step on it. The inner end of the rear frame 201 is rotatably mounted with a rear axle 203 via a rotating shaft, and the rear axle 203 is rotatably connected to the two pulleys 4 located on the right side of the bottom plate 5 via a rotating shaft. The bottom end of the push rod 2 is rotatably mounted with a front axle 301 via a rotating shaft, and the front axle 301 is rotatably connected to the two pulleys 4 located on the left side of the bottom plate 5. A brake plate 202 is rotatably mounted on the outer surface of the rear axle 203, and the brake plate 202 and the rear axle 203 are connected by a torsion spring.

[0039] Specifically, the front axle 301 and the rear axle 203 can rotate independently relative to the pedal 1. When the user performs a turning operation, the pedal 1 can be driven to tilt synchronously by tilting the body, thereby driving the front axle 301 and the rear axle 203 to deflect in a coordinated manner. During the entire turning process, the four pulleys 4 always maintain full contact with the ground, effectively preventing the wheels from hanging in the air or becoming unstable, thereby significantly improving the balance and control stability of the scooter during driving.

[0040] like Figure 3 、 Figure 4 、 Figure 6 As shown, more specifically, stabilizing rings 408 are provided at both ends of the flip frame 401. The stabilizing ring 408 on the right side is fixedly welded to the flip frame 401, while the stabilizing ring 408 on the left side is fixedly welded to the inside of the front frame 3. An insert block 206 is fixedly welded to one end of the rear frame 201 close to the flip frame 401. The insert block 206 is inserted into the inside of the stabilizing ring 408 on the right side of the flip frame 401. Two limit plates are fixedly installed on the outer surface of the insert block 206 and the inside of the stabilizing ring 408. The limit plates at the two locations are staggered with each other. A plurality of damping springs 205 are sleeved on the outer surface of the insert block 206. The plurality of damping springs 205 are respectively located between two adjacent limit plates. When the rear frame 201 rotates in any direction (maximum rotation angle 52°) and compresses the damping spring 205, the elastic force is then released by the damping spring 205, and the rear frame 201 is driven to return to its initial state through the limit plate.

[0041] Example 2: Please refer to Figure 3 -

[0042] Figure 5 , a four-wheeled scooter with a multi-angle turning and tilting structure, based on Example 1, the inner end of the rear frame 201 is fixedly installed with a guide plate 204 by bolts, and the guide plate 204 is located at the center of the rear frame 201, the inner end of the flip frame 401 is fixedly welded with an output rod 407, the outer surface of the output rod 407 is provided with a spiral groove, and the outer surface of the output rod 407 is sleeved with a movable sleeve 402, the inner end of the movable sleeve 402 is fixedly installed with a protrusion, the protrusion is inserted into the interior of the spiral groove, the outer surface of the movable sleeve 402 is slidably connected to the bottom plate 5, and when the output rod 407 rotates, its spiral groove drives the movable sleeve 402 to reciprocate by cooperating with the protrusion;

[0043] The bottom end of the pedal 1 is fixedly connected to two guide cylinders 403 by bolts. The guide cylinders 403 are respectively located on the front and rear sides of the base plate 5. A traction rod 404 is passed through the interior of each guide cylinder 403. The inner diameter of the guide cylinder 403 is larger than that of the traction rod 404. The end of the traction rod 404 away from the movable sleeve 402 is movably connected to the guide plate 204 via a universal joint. The outer surface of the output rod 407 is sleeved with a synchronous cylinder 406, and the synchronous cylinder 406 is rotatably connected to the movable sleeve 402. The outer surface of the synchronous cylinder 406 is fixedly mounted with two collars, which are sleeved on the outer surface of the traction rod 404.

[0044] Specifically, a limiting ring 405 is fixedly provided on the outer surface of the traction rod 404. The size of the limiting ring 405 is larger than the inner diameter of the collar, so that when the synchronous cylinder 406 moves, the collar can push the limiting ring 405, thereby driving the traction rod 404 to move. More specifically, the limiting rings 405 on the outer surfaces of the two traction rods 404 are staggered and respectively located on the left and right sides of the collar.

[0045] When the collar moves to the left, it pushes the left limit ring 405 to drive the traction rod 404 to move. When it moves to the right, it pushes the right limit ring 405 to drive the traction rod 404 to move. The two traction rods 404 move towards each other to realize the rotation drive of the guide plate 204. The length design of the traction rod 404 ensures that the collar always keeps in contact with the traction rod 404 during the entire movement.

[0046] like Figure 5 -

[0047] Figure 7 , a guide groove 409 is provided on the outer surface of the output rod 407, and the guide groove 409 is located on the left side of the stabilizing ring 408 on the left side of the flip frame 401, wherein the structure and working principle of the interior of the stabilizing ring 408 and the output rod 407 are the same as those of the stabilizing ring 408 on the right side of the flip frame 401, and no further details are given here. A traction belt 302 is passed through the inner end of the front frame 3, and the traction belt 302 is made of elastic metal material, which has both elasticity and rigidity, and has excellent anti-fracture performance while ensuring deformation ability. A movable cylinder 303 is fixedly welded to the end of the traction belt 302, and the movable cylinder 303 is located inside the front frame 3, and a passive sleeve 304 is fixedly welded to the end of the movable cylinder 303 away from the traction belt 302, and the passive sleeve 304 is slidably connected to the inner end of the front frame 3;

[0048] A locking sleeve 310 is fixedly welded to the inner end of the movable cylinder 303, and a movable tube 305 is passed through the inner end of the passive sleeve 304. The end of the movable tube 305 away from the output rod 407 is passed through the interior of the locking sleeve 310, and the end of the movable tube 305 away from the locking sleeve 310 is fixedly welded to the passive rod 307, and a convex rod is fixedly welded to the outer surface of the passive rod 307. The convex rod is passed through the interior of the guide groove 409, and the guide groove 409 is arc-shaped. When the output rod 407 rotates in any direction, the convex rod can be driven to move in the direction away from the movable tube 305 through the arc-shaped guide groove 409, and then the convex rod also drives the passive rod 307 to move.

[0049] The outer surface of the locking sleeve 310 is covered with a locking ring 309. The end of the locking sleeve 310 near the movable tube 305 is provided with multiple retaining plates. The outer surface of the movable tube 305 has retaining grooves, and the retaining plates and the retaining grooves engage with each other. When the locking ring 309 moves toward the movable tube 305, the locking ring 309 corresponds to the retaining grooves, and the retaining plates cannot be disengaged from the retaining grooves. The locking ring 309 is connected to the movable tube 303 via a return spring 311. Specifically, the movable tube 305 passes through the interior of the locking sleeve 310. Even if the retaining plates are disengaged from the retaining grooves, the locking sleeve 310 remains mounted on the outer surface of the movable tube 305. The maximum displacement range of the movable tube 305 is limited within the locking sleeve 310, ensuring that the two will never completely disengage.

[0050] A support rod 306 is fixedly installed on the inner end of the front frame 3, and an output pipe 308 is fixedly installed on the outer surface of the support rod 306. The output pipe 308 is located inside the support rod 306. A movable tube 305 is passed through the outer surface of the output pipe 308, and the movable tube 305 corresponds to the locking ring 309.

[0051] like Figure 8 -

[0052] Figure 10 As shown, a pressure cylinder 103 is fixedly installed at the inner end of the push rod 2, and a pressure tube 101 is fixedly connected to the output end of the pressure cylinder 103, and the free end of the pressure tube 101 is fixedly connected to the output tube 308. A movable sleeve 107 is passed through the inner end of the pressure cylinder 103, and a movable plug 108 is fixedly welded to the bottom end of the movable sleeve 107. The outer surface of the movable plug 108 is covered with a sealing rubber ring and fits with the inner wall of the pressure cylinder 103 to improve the sealing performance. The interior of the pressure cylinder 103 is filled with hydraulic oil.

[0053] Specifically, a slide groove is provided on the outer surface of the movable sleeve 107, and a slider is fixedly installed on the upper end of the pressure cylinder 103. The slider is inserted into the slide groove, so that the movable sleeve 107 will not rotate when moving upward or downward. A screw 106 is threaded through the inner end of the movable sleeve 107, and a crown gear 105 is fixedly installed on the upper end of the screw 106. An adjusting knob 102 is rotatably installed on the outer surface of the push rod 2, and a driving gear 104 is fixedly welded to the end of the adjusting knob 102 close to the screw 106. The driving gear 104 is meshed with the crown gear 105, and the driving gear 104 is driven to rotate by the adjusting knob 102. Then the driving gear 104 drives the screw 106 to rotate under the action of meshing with the crown gear 105, thereby driving the movable sleeve 107 to move upward or downward.

[0054] like Figure 11 -

[0055] Figure 13 As shown, two bridge frames 313 are rotatably mounted on the outer surface of the front bridge 301, and the two pulleys 4 located on the left side of the bottom plate 5 are rotatably connected to the bridge frames 313 via a rotating shaft. A limit housing 314 is fixedly mounted on the inner end of the front bridge 301, and two traction plates 316 are slidably mounted on the inner end of the limit housing 314. One end of the traction plate 316 is rotatably connected to the bridge frame 313, and the connection point deviates from the rotation center of the bridge frame 313. The two traction plates 316 are connected to the traction belt 302 via a connecting piece 315.

[0056] When the traction plates 316 move toward each other, the bridge 313 can be driven to rotate around the rotation connection between the bridge 313 and the front bridge 301, so that the bridge 313 is tilted toward the direction close to the pedal 1 (such as Figure 13 As shown in FIG3 , the rotation angle of the bridge 313 can be adjusted between 0° and 21°. The specific angle is automatically adjusted according to the user's operating force and steering requirements. As the bridge 313 rotates, the two pulleys 4 provided thereon also rotate relative to each other, increasing the angle between the two pulleys 4, thereby ensuring that the pulleys 4 always maintain good contact with the ground. During the scooter's turning process, this structure helps to improve the lateral support force and overall stability of the scooter, preventing the risk of slipping or rollover due to wheel offset or insufficient inclination, and significantly enhancing the vehicle's safety and controllability during steering.

[0057] Damping sleeves (not shown in the figure) are fixedly installed on the outer surface of the passive sleeve 304 and the inner end of the front frame 3. The two dampers are in contact with each other to increase friction. The bridge frame 313 and the front axle 301 are connected by a torsion spring. The elastic force of the torsion spring is smaller than the friction between the passive sleeve 304 and the front frame 3.

[0058] Light strips are installed on both sides of the outer periphery of the pedal 1. The light strips are arranged on both sides of the pedal and can provide certain lighting for the user at night.

[0059] The working principle of the present invention is:

[0060] During use, the adjusting knob 102 drives the driving gear 104 to rotate, and then the driving gear 104 drives the screw 106 to rotate under the action of meshing with the crown gear 105, thereby driving the movable sleeve 107 to move upward, and the hydraulic oil inside the unlocking rod 312 is pumped back into the pressure cylinder 103 through the pressure pipe 101. The hydraulic oil inside the unlocking rod 312 is reduced and moves in the direction away from the locking sleeve 310. The angle of the adjusting knob 102 is rotated according to the user's habit;

[0061] When using a skateboard, especially when turning, the body tilts to varying degrees depending on the angle of the turn. Therefore, the pedal 1 deflects along with the body's tilt. At this time, the tilt frame 401 drives the output rod 407 to rotate, and the movable sleeve 402 drives the synchronous cylinder 406 to move. At this time, the collar moves along with the synchronous cylinder 406.

[0062] When the collar moves, it pushes the left limiting ring 405 to drive the traction rod 404 to move. When it moves to the right, it pushes the right limiting ring 405 to drive the traction rod 404 to move. The two traction rods 404 move toward each other, and the guide plate 204 is driven to rotate. Then the guide plate 204 drives the rear axle 203 to rotate. The rotation angle follows the tilt angle of the pedal 1. At this time, the rotation of the rear axle 203 drives the pulley 4 to deflect, so that the pulley 4 can maintain full contact with the ground, effectively avoiding the occurrence of wheel hanging or instability.

[0063] At the same time, when the output rod 407 rotates, it drives the passive rod 307 to move through the guide groove 409. The passive rod 307 drags the locking sleeve 310 to move through the support rod 306. During the movement of the locking sleeve 310, the traction belt 302 is pulled to move through the movable cylinder 303. Then, the traction belt 302 drives the two traction plates 316 to move toward each other through the connecting piece 315, so that the bridge frame 313 rotates around its rotation connection with the front bridge 301, causing the bridge frame 313 to tilt in the direction close to the pedal 1, thereby increasing the angle between the two pulleys 4, so that the pulley 4 always maintains good contact with the ground. During the turning process of the scooter, this structure helps to improve the lateral support force and overall stability of the scooter, prevents the risk of slipping or rollover due to wheel offset or insufficient inclination, and significantly enhances the safety and controllability of the vehicle in the turning state;

[0064] The locking sleeve 310 moves synchronously with the movable tube 305. When the locking ring 309 contacts the unlocking lever 312, the unlocking lever 312 pushes the locking ring 309 in the opposite direction of the movement of the locking sleeve 310. At this time, no matter how the pedal 1 deflects, the traction belt 302 remains stationary due to the contact between the damping sleeve between the outer surface of the passive sleeve 304 and the inner end of the front frame 3.

[0065] When the pedal 1 returns to a balanced state, the movable tube 305 pushes back the locking sleeve 310, so that the movable cylinder 303 returns to its initial state, and the bridge 313 also returns to its initial state under the action of the torsion spring, and the pulley 4 on the bridge 313 also returns to its initial state, and then it can continue to drive in a straight line.

[0066] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A four-wheeled scooter with a multi-angle turning and tilting structure, comprising a front frame (3), characterized in that: A push rod (2) is passed through the inner end of the front frame (3), and a handle for easy grasping is fixedly installed on the end of the push rod (2) away from the front frame (3), so that the user can better control it. The end of the front frame (3) away from the push rod (2) is fixedly connected to a bottom plate (5), and two pulleys (4) are provided on the left and right sides of the bottom plate (5). A rear frame (201) is rotatably installed on the end of the bottom plate (5) away from the front frame (3), and a flip-up handle is provided above the bottom plate (5). A rotating frame (401) is provided, and a pedal (1) is fixedly installed on the outer surface of the turning frame (401) for the convenience of a user to step on. A rear axle (203) is rotatably installed on the inner end of the rear frame (201), and the rear axle (203) is rotatably connected to two pulleys (4) located on the right side of the bottom plate (5). A front axle (301) is installed on the bottom end of the push rod (2), and the front axle (301) is rotatably connected to two pulleys (4) located on the left side of the bottom plate (5).

2. The four-wheeled scooter with a multi-angle turning and tilting structure according to claim 1, characterized in that: A guide plate (204) is fixedly mounted on the inner end of the rear frame (201), and the guide plate (204) is located at the center of the rear frame (201). An output rod (407) is fixedly mounted on the inner end of the flip frame (401). A spiral groove is formed on the outer surface of the output rod (407), and a movable sleeve (402) is sleeved on the outer surface of the output rod (407). A protrusion is fixedly mounted on the inner end of the movable sleeve (402), and the protrusion is inserted into the inner portion of the spiral groove. The outer surface of the movable sleeve (402) is slidably connected to the bottom plate (5), and when the output rod (407) rotates, the spiral groove drives the movable sleeve (402) to reciprocate by cooperating with the protrusion.

3. The four-wheeled scooter with a multi-angle turning and tilting structure according to claim 2, characterized in that: The bottom end of the pedal (1) is fixedly connected to two guide cylinders (403), and a traction rod (404) is inserted into the interior of each guide cylinder (403). The traction rod (404) is movably connected to the guide plate (204) at one end away from the movable sleeve (402). The outer surface of the output rod (407) is sleeved with a synchronous cylinder (406), and the synchronous cylinder (406) is rotatably connected to the movable sleeve (402). Two rings are fixedly installed on the outer surface of the synchronous cylinder (406), and the rings are sleeved on the outer surface of the traction rod (404).

4. The four-wheeled scooter with a multi-angle turning and tilting structure according to claim 3, characterized in that: A guide groove (409) is provided on the outer surface of the output rod (407), a traction belt (302) is passed through the inner end of the front frame (3), the end of the traction belt (302) is fixedly connected to a movable cylinder (303), and the movable cylinder (303) is located inside the front frame (3), and one end of the movable cylinder (303) away from the traction belt (302) is fixedly connected to a passive sleeve (304), and the passive sleeve (304) is slidably connected to the inner end of the front frame (3).

5. The four-wheeled scooter with a multi-angle turning and tilting structure according to claim 4, characterized in that: The inner end of the movable cylinder (303) is fixedly connected to a locking sleeve (310), the inner end of the passive sleeve (304) is penetrated by a movable tube (305), one end of the movable tube (305) away from the output rod (407) is penetrated inside the locking sleeve (310), and the end of the movable tube (305) away from the locking sleeve (310) is fixedly connected to the passive rod (307), and a protruding rod is fixedly installed on the outer surface of the passive rod (307), and the protruding rod is penetrated inside the guide groove (409).

6. The four-wheeled scooter with a multi-angle turning and tilting structure according to claim 5, characterized in that: The outer surface of the locking sleeve (310) is sleeved with a locking ring (309); a plurality of clamping plates are provided at one end of the locking sleeve (310) close to the movable tube (305); a clamping groove is provided on the outer surface of the movable tube (305); the clamping plates and the clamping groove are engaged with each other; a support rod (306) is fixedly installed at the inner end of the front frame (3); an output tube (308) is fixedly installed on the outer surface of the support rod (306); the output tube (308) is located inside the support rod (306); a movable tube (305) is passed through the outer surface of the output tube (308), and the movable tube (305) corresponds to the locking ring (309).

7. The four-wheeled scooter with a multi-angle turning and tilting structure according to claim 1, characterized in that: A pressure cylinder (103) is fixedly mounted on the inner end of the push rod (2); the output end of the pressure cylinder (103) is fixedly connected to a pressure pipe (101), and the free end of the pressure pipe (101) is fixedly connected to an output pipe (308); a movable sleeve (107) is passed through the inner end of the pressure cylinder (103); and a movable plug (108) is fixedly connected to the bottom end of the movable sleeve (107).

8. The four-wheeled scooter with a multi-angle turning and tilting structure according to claim 1, characterized in that: Two bridge frames (313) are rotatably mounted on the outer surface of the front axle (301), two pulleys (4) located on the left side of the bottom plate (5) are rotatably connected to the bridge frames (313), and a limiting shell (314) is fixedly mounted on the inner end of the front axle (301).

9. The four-wheeled scooter with a multi-angle turning and tilting structure according to claim 8, characterized in that: Two traction plates (316) are slidably mounted on the inner end of the limiting shell (314), and one end of the traction plate (316) is rotatably connected to the bridge frame (313), and the connection point deviates from the rotation center of the bridge frame (313). The two traction plates (316) are connected to the traction belt (302) via a connecting piece (315).

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