CN210364214U - Retractable rear wheel structure of electric travelling case capable of being ridden - Google Patents

Abstract

The utility model relates to a rear wheel receive and releases the structure, especially a can ride retractable rear wheel structure of electronic travelling basket, including rear wheel support, act as go-between, spring and drive connecting rod structure, the back wheel of riding is installed on the rear wheel support, and the rear wheel support is rotatably installed on the box through the pivot, acts as go-between and packs up the rotatory to vertical open mode of state by the level through drive connecting rod drive rear wheel support, and the spring action rotates the rear wheel support that resets on rear wheel support or drive connecting rod. The beneficial effects of the utility model are that, the rear wheel is received simple structure reliably, rides the wheel after and packs up the back pulley of being convenient for and carries out, avoids the motion of unnecessary wheel to interfere.

Description

Retractable rear wheel structure of electric travelling case capable of being ridden

Technical Field

The utility model relates to a rear wheel receive and releases the structure, especially a can ride retractable rear wheel structure of electronic travelling basket.

Background

The prior Chinese patent No. CN 208550268U discloses an electric traveling case, and the disclosure describes an electric traveling case which comprises a case body, a battery, a sleeve fixed inside the case body, a telescopic rod arranged in the sleeve and capable of sliding relative to the sleeve to protrude out of the case body, and two rear wheels arranged at the bottom of the case body, wherein the front end of the telescopic rod is connected with a front handle rod and front wheels, and the case body is provided with a top for riding. However, in practical use, the problem of straight line walking is not great due to the fact that the distance between two rear wheels is too short due to the limitation of the thickness of the box body, but the rear wheels are prone to side turning during turning, particularly sharp turning, the maneuverability is poor, and potential safety hazards also exist.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the retractable rear wheel structure of the electric travelling case capable of being ridden is provided, and the movement interference of redundant wheels at the lower part of the case body is avoided.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a can ride electronic travelling basket can receive and release rear wheel structure, includes rear wheel support, acts as go-between, spring and drive connecting rod structure, and the rear wheel of riding is installed on rear wheel support, and rear wheel support rotatably installs on the box through the pivot, and the act as go-between with receive and release power device and be connected, act as go-between and drive rear wheel support and pack up the state rotation to vertical open state by the level through drive connecting rod drive rear wheel support, spring action at rear wheel support or drive connecting rod rotation rear wheel support that resets.

Preferably, the driving connecting rod structure comprises a rocker and a connecting rod, one end of the rocker is hinged to the box body, the other end of the rocker is hinged to one end of the connecting rod, the other end of the connecting rod is hinged to the rear wheel support, the rocker, the connecting rod and the rear wheel support form a rocker mechanism, one side or two sides of the rocker are provided with a protruding driving end, the pull wire and the spring respectively act on the driving end to drive the rocker to swing, the swing of the rocker drives the rear wheel support to rotate and retract and open, when the pull wire drives the rear wheel support to open to a vertical state, the rocker is limited by the limiting part, and the rocker and the connecting rod pass through collinear positions of the rocker and the connecting rod and are used for blocking.

Preferably, the number of the rear riding wheels is one, the rear riding wheel is collected and placed by the rear wheel collecting and placing device in a left-right rotating mode, the two sides of the rocker are provided with the extending driving ends, the pull wire and the spring are respectively connected with the two driving ends of the rocker, and the pull wire drives the rear wheel support to be vertically opened in a mode of upwards pulling the driving ends.

Preferably, the number of the rear riding wheels is two, the rear riding wheels are respectively positioned on two sides of the box body, the rear riding wheels are collected and placed by the rear wheel collecting and placing device in a manner of rotating towards the inner side direction of the box body, the two rear wheel collecting and placing devices are identical in structure and are symmetrically arranged, the rocker is provided with a driving end extending inwards, the pull wire and the spring act on the driving end, and the pull wire drives the rear wheel support to be vertically opened in a manner of upwards pulling the driving end.

The beneficial effects of the utility model are that, the utility model discloses a can ride electronic travelling basket's retractable rear wheel structure, the wheel of riding after adopts the side folding to receive and release, do not occupy the inner space of box, ride when folding the back that receives and releases and walk the wheel when single, can ride electronic travelling basket and be two rounds of forms, ride when folding the back that receives and releases and walk the wheel when two individual, can ride electronic travelling basket and be positive tricycle form, two rounds of forms and ordinary bicycle are the same stability and control the nature receipts very high, the rear wheel is in the both sides that link mechanism expanded the underbracing box during positive tricycle form, compare the design of two rear wheels among the prior art, its wheel interval is wideer, be difficult for turning on one's side at the turn in-process.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural view of a single rear riding wheel side folding and unfolding according to a first embodiment of the present invention.

Fig. 2 is a schematic structural view of a single rear riding wheel according to a first embodiment of the present invention after being unfolded.

Fig. 3 is a schematic structural view of a single rear riding wheel in a folded state in a lateral direction according to a first embodiment of the present invention.

Fig. 4 is a schematic structural view of a double rear riding wheel according to a second embodiment of the present invention after being unfolded.

Fig. 5 is a schematic structural view of the embodiment of the present invention after the two rear riding wheels are folded in the lateral direction.

Fig. 6 is an enlarged view at a in fig. 5.

Fig. 7 is a real object diagram of the embodiment of the utility model after the two rear riding wheels are unfolded.

Fig. 8 is a schematic view of the structure of the suitcase with the swing arm mechanism of the present invention.

Fig. 9 is a schematic structural diagram of the swing arm mechanism of the present invention.

Fig. 10 is an exploded view of the swing arm mechanism of the present invention.

Fig. 11 is an L-shaped swing arm.

In the figure: 101. the bicycle comprises a rear riding wheel, 102, a rotating shaft, 103, a first driving lever, 104, a second driving lever, 105, a third driving lever, 106, a fourth driving lever, 107, a fifth driving lever, 108, a frame wire drawing sleeve, 109, a bicycle body, 110, a rear wheel support, 111, a fixed fulcrum, 112, a shaft sleeve, 113, a reset tension spring, 200, a swing arm mechanism, 201, a screw rod, 202, an upper cover plate, 203, elastic rubber, 204, a lower cover plate, 205, a lower nut, 206, an upper nut, 207-1, an upper bearing, 207-2, a lower bearing, 208, a wire drawing sleeve, 209-1, upper pressure-resistant rubber, 209-2, lower pressure-resistant rubber, 210, a wire power nut, 211, a wire drawing, 212, a motor, 213, a gear box, 214, a side shell, 215, a clamping groove, 216, a spiral guide mechanism, 217, a swing arm, 218, a front fork device, 219, a front wheel, 220 and a front fork.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

Example one

As shown in fig. 1 to 3, the retractable rear wheel structure of the electric suitcase capable of being ridden comprises a rear wheel support 110, a pull wire 211, a reset tension spring 113 and a driving link structure, wherein the rear riding wheel 101 is mounted on the rear wheel support 110, the rear wheel support 110 is rotatably mounted on the body 109 through a rotating shaft 102, the pull wire is connected with a retractable power device, the pull wire 211 drives the rear wheel support 110 to rotate from a horizontal retracted state to a vertical open state through the driving link, and the reset tension spring 113 acts on the rear wheel support 110 or the driving link to rotate the reset rear wheel support 110.

The driving connecting rod structure comprises a rocker 105 and a connecting rod 104, one end of the rocker 150 is hinged to a vehicle body 109, the other end of the rocker 105 is hinged to one end of the connecting rod 104, the other end of the connecting rod 104 is hinged to a rear wheel support 110, the rocker 105, the connecting rod 104 and the rear wheel support 110 form a rocker mechanism, two sides of the rocker 105 are provided with extending driving ends, a pull wire 211 and a reset tension spring 113 respectively act on the driving ends to drive the rocker 105 to swing, the swing of the rocker 105 drives the rear wheel support 110 to rotate to retract and open, when the pull wire 211 drives the rear wheel support 110 to open to a vertical state, the rocker 105 is limited by a limiting part, and the rocker 105 and the connecting rod 104 pass through collinear positions of the rocker 105 and the connecting rod 104 to form.

Specifically, the number of the rear riding wheels 101 is one, the rear wheel retraction device retracts the rear riding wheels 101 in a left-right rotating mode, two sides of the rocker 105 are provided with extending driving ends, the pull wire 211 and the reset tension spring 113 are respectively connected with the two driving ends of the rocker 105, and the pull wire 211 drives the rear wheel support 110 to be vertically opened in a mode of pulling the driving ends upwards.

The structure only comprises the pull wire 211 and the reset tension spring 113, so that the state of the rear riding wheel 101 can be changed, and the pull wire 211 can lock the riding state of the rear riding wheel 101, namely the state of the rear riding wheel 101 vertical to the ground is not changed.

More specifically, the rear wheel bracket 110 is fixed to the rotating shaft 102 by electric welding; the shaft sleeve 112 is fixed with the vehicle body 109 by electric welding; the sleeve 112 is sleeved outside the rotating shaft 102, so that the rotating shaft 102 can only rotate around the sleeve 112 and cannot move back and forth, left and right and up and down. The rotating shaft 102 is provided with a first pulling rod 103, and the first pulling rod 103 is fixed with the rotating shaft 102; the first shifting lever 103 is connected with the connecting rod 104 through a pin and can only rotate around the corresponding pin, and the first shifting lever 103 is used for realizing indirect hinge joint of the connecting rod 104 and the rear wheel bracket 110 and is equal to direct hinge joint of the connecting rod 104 and the rear wheel bracket 110; the connecting rod 104 is connected with the rocker 105 through a pin and can only rotate around the corresponding pin; the middle parts of the rocker 105 and the fourth shift lever 106 are fixed by electric welding, so that the fourth shift lever 106 becomes the driving ends of two sides of the rocker 105, a hole is formed at the electric welding joint, and the hole is connected with the fixed pivot 111 through a pin, so that the rocker 105 and the fourth shift lever 106 rotate around the fixed pivot 111 simultaneously; one end of the fourth shift lever 106 is fixed with a pull wire 211 through a screw, the other end of the fourth shift lever 106 is fixed with a reset tension spring 113, and the pull wire 211 can freely turn through the frame pull wire sleeve 108 to achieve force transmission.

The motion principle of the mechanism is as follows: when the riding state is switched, the power take-up and pay-off device works, the pull wire 211 is pulled upwards to cause the fourth shift lever 106 to move upwards, the rocker 105 rotates clockwise by taking the fixed fulcrum 111 as a fulcrum, the connecting rod 104 moves upwards, the first shift lever 103, the rotating shaft 102, the rear wheel support 110 and the rear riding wheel 101 rotate anticlockwise by taking the shaft sleeve 112 as a fulcrum, when the rocker 105 and the connecting rod 104 rotate slightly to pass through collinear positions of the rocker 105 and the connecting rod 104, the fourth shift lever 106 touches the limiting structure 114, the fourth shift lever 106 is forced to stop moving due to the tightening of the pull wire 211 and blocks the connecting rod 104 in the state, the rear riding wheel 101 is just vertical to the ground, the driving connecting rod structure forms a blocking effect on the rear wheel support 110, at the moment, the first shift lever 103 cannot move clockwise or anticlockwise, and the rear riding wheel 101 is stable and immovable in the standing state.

When the bicycle is not ridden, the power device is retracted, the pull wire 211 is in a loose state, the reset tension spring 113 is tightened, so that the rocker 105 rotates anticlockwise by taking the fixed fulcrum 111 as a fulcrum to drive the connecting rod 104 to move downwards, the first shift lever 103, the rotating shaft 102, the rear wheel support 110 and the rear riding wheel 101 simultaneously rotate clockwise by taking the shaft sleeve 112 as the fulcrum, and the rear riding wheel 101 is vertically changed into a lying state, namely the wheel is folded.

The structure of the retractable rear wheel is further explained below by taking a riding electric suitcase with the retractable rear wheel structure as an example.

A riding electric travel suitcase is characterized in that a swing arm mechanism 200 is fixedly arranged on the outer wall of a suitcase body 100, a side shell 214 of the swing arm mechanism 200 is fixedly connected with the suitcase body 100, the swing arm mechanism 200 drives a front fork device 218 to swing horizontally, the front fork device 218 can be lifted or put down while swinging, a front wheel 219 is arranged on a front fork 220 of the front fork device 218, and a handrail 408 is arranged at the top end of the front fork device 218.

The front wheel 219 is the action wheel, adopts brushless motor drive, and front wheel 219 is connected through the wire and controller electricity, installs the electric door on the car handrail 408, and the electric door is connected through the wire and controller electricity to through twisting or loosening the mode of electric door, send the signal for the controller, control the battery by the controller again and give the size of front wheel delivery current, thereby realize the speed governing, do not have the demonstration of electric door in the picture.

The specific structure of the swing arm mechanism 200 shown in fig. 8 to 10 is as follows: an output shaft of a motor 212 is fixedly connected with an input end of a gear box 213 and drives the gear box 213 to rotate when rotating, the gear box 213 is screwed on an upper cover plate 202 through screws, the upper cover plate 202 belongs to one part of a shell, the shell consists of a side shell 214, and an upper cover plate 202 and a lower cover plate 204 which are fixedly installed at two ends of the side shell 214, an output end of the gear box 213 is fixedly connected with a screw rod 201, the screw rod 201 is sequentially downwards arranged with the direction of the gear box 213 as a starting point, and one to two upper nuts 206, an upper bearing 207-1, the upper cover plate 202, upper pressure-resistant rubber 209-1, a pull wire power nut 210, elastic rubber 203, a swing arm 217, lower pressure-resistant rubber 209-2, a lower cover plate 204, a lower bearing 207-2 and one; the screw rod 201 is externally provided with external threads and is respectively pressed into the upper cover plate 202 and the lower cover plate 204 and the side shell 214 through the upper bearing 207-1 and the lower bearing 207-2 for fixing and supporting, can do continuous circular rotation motion, the side shell 214 is cylindrical and is fixedly arranged between the upper cover plate 202 and the lower cover plate 204 in a welding, clamping or bolt fixing mode, the side shell 214 and the box body 100 are fixedly connected in a welding, gluing or clamping mode and the like, the side shell 214 is provided with a spiral guide mechanism 216 with a spiral angle of 180 degrees, the rear section of the swing arm 217 extends into the spiral guide mechanism 216, and is matched with a screw rod and a nut of the screw rod 201, the spiral guide mechanism 216 is an arc chute, the arc angle is 180 degrees, the rear section of the swing arm 217 is clamped in the chute of the spiral guide mechanism 216 of the side shell 214, when the screw rod 201 rotates, the swing arm 217 moves up and down, and meanwhile, the swing arm 217 slowly swings horizontally for 180 degrees; the inner wall of the side shell 214 is provided with a clamping groove 215, the length of the clamping groove 215 is the same as the height of the side shell 214, a protruding part of a pull-wire power nut 210 is arranged in the clamping groove 215 in a sliding mode, a pull wire 211 is fixedly installed in the protruding part of the pull-wire power nut 210, in order to enable a swing arm 217 to smoothly swing for 180 degrees and tighten or loosen the pull wire 211 during swinging, a copper nut is embedded in one end of the swing arm 217 and is matched with the thread on the lead screw 201 in a positive fit mode, an inner thread matched with the lead screw 201 is arranged in the middle of the pull-wire power nut 210, the pull-wire power nut 210 is matched with the lead screw 201 through the lead screw and the nut, the protruding part of the pull-wire power nut 210 is clamped in the clamping groove 215 of the side shell 214 at the same time, the pull-wire power nut 210 can only vertically move vertically and vertically when the lead screw 201 is matched with the thread 215 and rotates, the pull wire 211 is fixed on, the wire 211 is forced to follow the up-and-down movement.

The function of each part is further described, wherein:

the screw 201 and the swing arm 217 are matched to convert the rotary power source of the motor 212 into the up-and-down motion and horizontal swing of the swing arm 217.

The upper cover plate 202, the lower cover plate 204 and the side casing 214 together form a housing, and the upper cover plate 202 and the lower cover plate 204 are used for positioning the screw rod 201 in the side casing 214 and transmitting all bearing force to the side casing 214.

The elastic rubber 203 is arranged between the swing arm 217 and the wire power nut 210 and is compressed for eliminating abnormal sound generated by the gap.

The lower nut 205 and the upper nut 206 are used for fixing the screw 201 between the upper cover plate 202 and the lower cover plate 204, and the axial relative positions of the lower nut 205 and the upper nut 206 are adjusted by rotating the three.

The upper bearing 207-1 and the lower bearing 207-2 eliminate the friction resistance of the swing arm 217 and the lead screw 201 when rotating relative to the shell 214, and the pull wire sleeve 208 can bend the pull wire 211 at any angle and transmit the force to the movable part.

The upper pressure-resistant rubber 209-1 and the lower pressure-resistant rubber 209-2 are made of high-density pressure-resistant and wear-resistant materials, and are extruded and deformed to generate large reaction force and large friction force when the mechanism moves, so that the current of the motor 212 is amplified, a controller obtains a signal, when the swing arm 217 presses the upper pressure-resistant rubber 209-1 or the lower pressure-resistant rubber 209-2, the upper pressure-resistant rubber 209-1 or the lower pressure-resistant rubber 209-2 also provides the swing arm 217 with large reaction force and large friction force, at the moment, the reaction force is transmitted to the motor 212 to amplify the current of the motor 212, the controller responds after induction, the power supply is cut off to stop moving, so that the swing arm 217 enters a specified position and is threaded in place, the elastic rubber 203 is arranged between the swing arm 217 and the wire drawing power nut 210, the elastic rubber 203 has enough compression stroke, and the elastic rubber 203 cannot be damaged or stop the swing of the swing arm 217 when the swing, and generates an elastic force of about 50 n for eliminating noise and vibration generated from the gap between the wire pulling power nut 210 and the swing arm 217.

The pull-wire power nut 210 is a power source of the pull wire 211, and converts the power of the motor 212 into the up-down pulling force through the lead screw 201 and transmits the up-down pulling force to the pull wire 211.

The outside package of acting as go-between 211 has the sleeve pipe of acting as go-between 208, and the sleeve pipe of acting as go-between 208 plays the strength transmission effect, and the acting as go-between 211 can be the steel wire product of no protective sheath, or take the protective sheath and have the cover of oil emollient in the protective sheath to act as go-between, and both are the market purchase, adopt the acting as go-between 211 that does not have the protective sheath in the picture, so set up the sleeve pipe in the junction and play the effect of protection acting as go-between 211, the sleeve pipe can be omitted when selecting the acting as.

The motor 212 is the power source of the entire mechanism.

The housing 214 is the carrier of the entire mechanism.

The clamping groove 215 and the spiral guide mechanism 216 play a guiding role, so that the wire pulling power nut 210 and the swing arm 217 move in a specified track, and when the wire pulling power nut 210 moves to the stroke end point, the swing arm 217 swings 180 degrees.

Fig. 11 shows a ridable electric traveling case, wherein a swinging arm 217 is connected with a front fork device 218, the swinging arm 217 is in an L shape, the swinging arm 217 comprises a long vertical section and a short vertical section, the rear end of the short vertical section is matched with a screw rod 201, and the front end of the long vertical section is connected with the front fork device 218.

The vehicle body 109 in the figure is a bearing frame in the box body, the box body which can be used for placing articles can be formed by sleeving the vehicle body 109 with an outer sleeve or processing a shell, and the box body can be used for people to ride

The rear riding wheel retracting device is rotatably mounted on the lower portion of the box body 100, the retracting and releasing power device of the rear riding wheel retracting device is a swing arm mechanism 200, a pull wire 211 is connected with a pull wire power nut 210 of the swing arm mechanism 200, the pull wire 211 pulls the rear riding wheel retracting device, the rear riding wheel 101 is put down, and the rear riding wheel and a front wheel 219 which is put down simultaneously form a two-wheeled electric vehicle to realize electric driving.

In the electric travelling case capable of being ridden, the power device for retracting and releasing the pull wire is the swing arm mechanism 200, and the power device for retracting and releasing the pull wire is an independent device relative to the swing arm mechanism 200, such as an electric push rod and the like which are independently arranged is not excluded.

Example two

A retractable rear wheel structure of a ridable electric suitcase shown in fig. 4 to 7 is different from the first embodiment in that: the number of the rear riding wheels 101 is two, the two rear riding wheels are respectively positioned at two sides of the box body 100, the rear riding wheels 101 are collected and placed by the rear wheel collecting and placing device in a mode of rotating towards the inner side direction of the box body 100, the two rear wheel collecting and placing devices are identical in structure and are symmetrically arranged, the rocker 105 is provided with a driving end extending towards the inner side, and the pull wire 211 and the reset tension spring 113 act on the driving end.

The structure only comprises the pull wire 211 and the reset tension spring 113, so that the state of the rear riding wheel 101 can be changed, and the pull wire 211 can lock the riding state of the rear riding wheel 101, namely the state of the rear riding wheel 101 vertical to the ground is not changed.

More specifically, the rear wheel bracket 110 is fixed to the rotating shaft 102 by electric welding; the shaft sleeve 112 is fixed with the vehicle body 109 by electric welding; the sleeve 112 is sleeved outside the rotating shaft 102, so that the rotating shaft 102 can only rotate around the sleeve 112 and cannot move back and forth, left and right and up and down. The first shift lever 103 is fixed with the rotating shaft 102; the first shift lever 103 is connected with the connecting rod 104 through a pin and can only rotate around the corresponding pin; the connecting rod 104 is connected with the rocker 105 through a pin and can only rotate around the corresponding pin; the rocker 105 and the fourth shift lever 106 are fixed by electric welding, so that the fourth shift lever 106 becomes a driving end of the rocker 105 extending inwards, a hole is formed at the electric welding joint, and the hole is connected with the fixed pivot 111 through a pin, so that the rocker 105 and the fourth shift lever 106 rotate around the fixed pivot 111 simultaneously; the pull wire 211 acts on the fourth driving lever 106 through the fifth connecting rod 107, and the fourth driving lever 106 is connected with the fifth connecting rod 107 through pins and can only rotate around the corresponding pins; the non-hinged ends of the fifth connecting rods 107 of the rear wheel retraction devices on the left side and the right side are combined together to be fixed with the pull wire 211 through screws, the hinged ends of the fifth connecting rods 107 are respectively fixed with the respective return tension springs 113, and the pull wire 211 can freely turn through the frame pull wire sleeve 108 to achieve force transmission.

The motion principle of the mechanism is as follows: when the riding state is switched, the retraction power device works, so that the pull wire 211 is pulled upwards, the fifth connecting rod 107 moves upwards, the rocker levers 105 of the rear wheel retraction devices on the left side and the right side respectively rotate clockwise and anticlockwise by taking the fixed fulcrum 111 as a fulcrum, and the connecting rod 104 moves downwards; when the rocker 105 and the connecting rod 104 slightly rotate to the collinear position of the rocker 105 and the connecting rod 104, the fourth shifting rod 106 touches the limiting structure 114, the fourth shifting rod 106 is forced to stop moving due to the tightening of the pull wire 211 and blocks the connecting rod 104 in the state, the rear riding wheel 101 is just vertical to the ground, the driving connecting rod structure forms a blocking effect on the rear wheel support 110, and the first shifting rod 103 cannot move clockwise or anticlockwise at the moment, namely the rear riding wheel 101 is stably erected.

When the power device is retracted in the non-riding state, and the pull wire 211 is in the loose state, the reset tension spring 113 is tightened, so that the fourth shift lever 106 and the rocker 105-1 rotate by taking the fixed fulcrum 111 as a fulcrum to drive the connecting rod 104 to move upwards, and the first shift lever 103, the rotating shaft 102, the rear wheel bracket 110 and the rear riding wheel 101 simultaneously rotate by taking the shaft sleeve 112 as the fulcrum, so that the two rear riding wheels 101 are changed from the vertical state to the lying state, namely the rear wheel 110 is retracted.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (4)

1. The utility model provides a can ride retractable rear wheel structure of electronic travelling basket, characterized by: including rear wheel support, act as go-between, spring and drive connecting rod structure, the rear wheel of riding is installed on rear wheel support, and rear wheel support rotatably installs on the box through the pivot, acts as go-between and receive and release power device and be connected, acts as go-between and packs up the state rotation to vertical open state by the level through drive connecting rod drive rear wheel support, and the spring action rotates the rear wheel support that resets on rear wheel support or drive connecting rod.

2. The retractable rear wheel structure of the ridable electric suitcase according to claim 1, characterized in that: the driving connecting rod structure comprises a rocker and a connecting rod, one end of the rocker is hinged to the box body, the other end of the rocker is hinged to one end of the connecting rod, the other end of the connecting rod is hinged to the rear wheel support, the rocker, the connecting rod and the rear wheel support form a rocker mechanism, one side or two sides of the rocker are provided with extending driving ends, the pull wire and the spring respectively act on the driving ends, the driving rocker swings, the swinging of the rocker drives the rear wheel support to rotate and retract and open, when the pull wire drives the rear wheel support to open to a vertical state, the rocker is limited by the limiting part, and the rocker and the connecting rod pass through collinear positions of the rocker and the connecting rod and are used for blocking.

3. The retractable rear wheel structure of the ridable electric suitcase according to claim 2, characterized in that: the rear riding device comprises a rear riding wheel, a rear wheel folding device, a pull wire and a spring, wherein the rear riding wheel is one in number, the rear riding wheel folding device folds and folds the rear riding wheel in a left-right rotating mode, the two sides of the rocker are provided with extending driving ends, the pull wire and the spring are respectively connected with the two driving ends of the rocker, and the pull wire drives the rear wheel support to be vertically opened in a mode of upwards pulling.

4. The retractable rear wheel structure of the ridable electric suitcase according to claim 2, characterized in that: the rear riding wheel is two in number and is respectively positioned on two sides of the box body, the rear riding wheel is collected and placed by the rear wheel collecting and placing device in a rotating mode towards the direction of the inner side of the box body, the two rear wheel collecting and placing devices are identical in structure and are symmetrically arranged, the rocker is provided with a driving end extending towards the inner side, the pull wire and the spring act on the driving end, and the pull wire drives the rear wheel support to be vertically opened in a mode of upwards pulling the driving end.

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