Electric luggage case with telescopic rear wheels

Abstract

The utility model relates to the technical field of electric luggage cases, in particular to an electric luggage case with telescopic rear wheels, which comprises a case body and a telescopic rear wheel mechanism, and the telescopic rear wheel mechanism comprises a motor, a left rear wheel, a right rear wheel, a rear wheel mounting seat, a driving gear, a left wheel telescopic rod and a right wheel telescopic rod. The left wheel telescopic rod and the right wheel telescopic rod are telescopically inserted into the rear wheel mounting base to stretch out and draw back, the left wheel telescopic rod and the right wheel telescopic rod are arranged front and back, rack structures are arranged on the wheel telescopic rods, and the driving gear is located between the rack structures on the left wheel telescopic rod and the right wheel telescopic rod and meshed with the rack structures on the left wheel telescopic rod and the right wheel telescopic rod at the same time. The motor drives the driving gear to rotate so as to drive the left wheel telescopic rod and the right wheel telescopic rod to stretch out or retract synchronously. The bicycle has the advantages that the stability can be improved by adjusting the wheel distance between the rear wheels, and the occupied space can be reduced by reducing the wheel distance between the rear wheels when the bicycle is not ridden. The telescopic rear wheel mechanism is small in occupied space, convenient to maintain and smooth in folding and unfolding.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric luggage technical field, especially a rear wheel telescopic electric luggage. BACKGROUND

[0002] Electric luggage is loved by more and more people for years, the existing electric luggage includes front handle assembly and box assembly, the bottom of front handle assembly has front wheel, front handle assembly is rotatably installed at the front of box assembly, is used for the steering of front wheel, box assembly includes box, rear wheel at the bottom of box and electric telescopic mechanism in the inside of box, front handle assembly is rotatably installed at the front end of electric telescopic mechanism, electric telescopic mechanism stretches out, drives front handle assembly to be away from the box.

[0003] The defects of the existing electric luggage are that: the left and right two rear wheels of the electric luggage are fixedly installed, and in order to facilitate the storage of the electric luggage, the width of the electric luggage and the wheel spacing between the left and right two rear wheels are small, and the riding stability is poor, especially prone to rollover under turning or complex road conditions. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem that the wheel spacing of the rear wheel of the existing electric luggage is small, and the stability is poor when riding.

[0005] The utility model adopts the technical scheme that: a rear wheel telescopic electric luggage, including box and telescopic rear wheel mechanism, telescopic rear wheel mechanism is installed at the lower part of box, telescopic rear wheel mechanism includes motor, left and right two rear wheels, rear wheel mounting seat, drive gear and left and right two wheel telescopic rods, left and right two wheel telescopic rods are telescopically inserted in rear wheel mounting seat and are telescopic, left and right two rear wheels are installed at the outer end of wheel telescopic rod of the same side, left and right two wheel telescopic rods are arranged front and back, be equipped with rack structure on wheel telescopic rod, the rack structure on left and right two wheel telescopic rods is arranged front and back oppositely, drive gear is located in rear wheel mounting seat, drive gear is located between the rack structure on left and right two wheel telescopic rods and simultaneously with the rack structure on left and right two wheel telescopic rods meshing, motor drives drive gear rotation, and then drive left and right two wheel telescopic rods to stretch out or retract synchronously.

[0006] In some embodiments, optionally, the two wheel telescopic rods are inserted into the same telescopic slot in the rear wheel mounting seat, the wheel telescopic rod has a concave step structure extending outward from the inner end of the wheel telescopic rod, the step structures on the left and right wheel telescopic rods are complementary, the step structure is divided into two steps, i.e., a low first step and a high second step, the first step is located inward of the second step, the rack structure is located on the step surface of the first step, and the inner end surface of the wheel telescopic rod is matched with the step surface of the second step of the other wheel telescopic rod to limit the retraction of the wheel telescopic rod.

[0007] In some embodiments, optionally, the last section of the rack structure has a tooth missing section matched with the driving gear to limit the extension of the wheel telescopic rod.

[0008] In some embodiments, optionally, the rear wheel mounting seat is located outward of the bottom of the box body, the top of the rear wheel mounting seat has outwardly extending side wings on the front and rear sides, the rear wheel mounting seat is mounted to the bottom of the box body through the side wings, the motor is mounted to the inner side of the bottom of the box body through a support, and the driving gear is mounted on the motor shaft of the motor.

[0009] The utility model discloses the beneficial effects are: through the wheel distance between the rear wheel adjustment, can improve stability, can also reduce the space occupation through reducing the wheel distance between the rear wheel when not riding, improve carrying convenience.

[0010] The telescopic rear wheel mechanism occupies small space, is convenient to maintain and is smooth in folding and unfolding. DRAWINGS

[0011] The utility model will be further explained in connection with the drawings and embodiments;

[0012] Fig. 1 It is the perspective view structural diagram of the rear wheel telescopic electric luggage case in the riding state;

[0013] Fig. 2 It is another perspective view structural diagram of the rear wheel telescopic electric luggage case in the riding state;

[0014] Fig. 3 It is the structural diagram of the box body interior;

[0015] Fig. 4 It is the perspective view structural diagram of the telescopic rear wheel mechanism;

[0016] Fig. 5 It is the front view structural diagram of the telescopic rear wheel mechanism;

[0017] Fig. 6 It is Fig. 5 A-A sectional view of;

[0018] In the diagram, 1. Box body, 2. Motor, 3. Rear wheel, 4. Rear wheel mounting base, 4-1. Side wing, 5. Drive gear, 6. Wheel telescopic rod, 7. Rack structure, 7-1. Gear notch, 8-1. First step, 8-2. Second step, 8-3. Step elevation, 9. Bracket, 10. Front handlebar assembly, 11. Front wheel. Detailed Implementation

[0019] Example 1, as Figs. 1-6 As shown, an electric luggage box with retractable rear wheels includes a box body 1 and a retractable rear wheel mechanism. The retractable rear wheel mechanism is installed at the lower part of the box body 1. The retractable rear wheel mechanism includes a motor 2, two rear wheels 3 (left and right), a rear wheel mounting seat 4, a drive gear 5, and two retractable wheel rods 6 (left and right). The two retractable wheel rods 6 are retractably inserted into the rear wheel mounting seat 4 for extension and retraction. The two rear wheels 3 are installed on the outer ends of the retractable wheel rods 6 on the same side. The two retractable wheel rods 6 are arranged front and rear. The retractable wheel rods 6 are provided with rack structures 7, which are arranged opposite to each other. The drive gear 5 is located in the rear wheel mounting seat 4 and is located between and simultaneously meshes with the rack structures 7 on the two retractable wheel rods 6. The motor 2 drives the drive gear 5 to rotate, thereby driving the two retractable wheel rods 6 to extend or retract synchronously.

[0020] Two wheel telescopic rods 6 are inserted into the same telescopic groove in the rear wheel mounting seat 4. The wheel telescopic rod 6 has a concave stepped structure extending from the inner end of the wheel telescopic rod 6 to the outside. The stepped structures on the left and right wheel telescopic rods 6 are complementary. The stepped structure is divided into two steps, one high and one low. The two steps are the lower first step 8-1 and the higher second step 8-2. The first step 8-1 is located inside the second step 8-2. The rack structure 7 is located on the step surface of the first step 8-1. The inner end face of the wheel telescopic rod 6 cooperates with the step surface 8-3 of the second step 8-2 of the opposite wheel telescopic rod 6 to limit the retraction of the wheel telescopic rod 6.

[0021] The rack structure 7 has a toothed section 7-1 at the end of its stroke. The toothed section 7-1 cooperates with the drive gear 5 to limit the extension of the wheel telescopic rod 6.

[0022] The rear wheel mounting seat 4 is located on the outer side of the bottom of the housing 1. The rear wheel mounting seat 4 has outwardly extending side wings 4-1 on the front and rear sides of the top. The rear wheel mounting seat 4 is installed to the bottom of the housing 1 through the side wings 4-1. The motor 2 is installed on the inner side of the bottom of the housing 1 through the bracket 9. The drive gear 5 is installed on the motor shaft of the motor 2.

[0023] The front wheel retractable electric luggage case further comprises a front handle assembly 10, the bottom of the front handle assembly 10 is provided with a front wheel 11 for steering, and the front handle assembly 10 is rotatably installed on the case body 1.

[0024] When riding is needed, the user controls the retractable rear wheel mechanism to act, so that the left and right rear wheels 3 are synchronously extended leftward and rightward and away from the case body 1, forming a stable riding posture and facilitating the user to ride.

[0025] When storage is needed, the user controls the retractable rear wheel mechanism to act reversely, so that the left and right rear wheels 3 are synchronously retracted and close to the case body 1, reducing the overall occupied space.

[0026] Embodiment 2 is a rear wheel retractable electric luggage case, which is basically the same as Embodiment 1, except that the front handle assembly 10 can also be retracted forward and backward relative to the case body 1. The rear wheel retractable electric luggage case of this embodiment 2 is provided with a handle electric retracting mechanism in the case body 1, the front handle assembly 10 is rotatably installed at the front end of the handle electric retracting mechanism, and the handle electric retracting mechanism is extended outward to drive the front handle assembly 10 away from the case body 1.

[0027] When riding is needed, the user controls the handle electric retracting mechanism and the retractable rear wheel mechanism to act, so that the front handle assembly 10 is extended forward and away from the case body 1, and the left and right rear wheels 3 are synchronously extended leftward and rightward and away from the case body 1, forming a stable riding posture and facilitating the user to ride.

[0028] When storage is needed, the user controls the handle electric retracting mechanism and the retractable rear wheel mechanism to act reversely, so that the front handle assembly 10 is retracted backward and close to the case body 1, and the left and right rear wheels 3 are synchronously retracted and close to the case body 1, reducing the overall occupied space.

Claims

1. An electric luggage box with retractable rear wheels, characterized in that: The device includes a housing (1) and a retractable rear wheel mechanism. The retractable rear wheel mechanism is installed in the lower part of the housing (1). The retractable rear wheel mechanism includes a motor (2), two rear wheels (3), a rear wheel mounting seat (4), a drive gear (5), and two wheel telescopic rods (6). The two wheel telescopic rods (6) are retractably inserted into the rear wheel mounting seat (4) for telescopic extension and retraction. The two rear wheels (3) are installed on the outer ends of the wheel telescopic rods (6) on the same side. The two wheel telescopic rods (6) are arranged front and rear. The wheel telescopic rods (6) are provided with rack structures (7). The rack structures (7) on the two wheel telescopic rods (6) are arranged front and rear opposite each other. The drive gear (5) is located in the rear wheel mounting seat (4). The drive gear (5) is located between the rack structures (7) on the two wheel telescopic rods (6) and simultaneously meshes with the rack structures (7) on the two wheel telescopic rods (6). The motor (2) drives the drive gear (5) to rotate, thereby driving the two wheel telescopic rods (6) to extend or retract synchronously.

2. The electric luggage compartment with retractable rear wheels according to claim 1, characterized in that: The two wheel telescopic rods (6) are inserted into the same telescopic groove in the rear wheel mounting seat (4). The wheel telescopic rod (6) has a concave step structure extending from the inner end of the wheel telescopic rod (6) to the outside. The step structures on the left and right wheel telescopic rods (6) are complementary. The step structure is divided into two steps, one high and one low. The two steps are the lower first step (8-1) and the higher second step (8-2). The first step (8-1) is located inside the second step (8-2). The rack structure (7) is located on the step surface of the first step (8-1). The inner end face of the wheel telescopic rod (6) cooperates with the step surface (8-3) of the second step (8-2) of the opposite wheel telescopic rod (6) to limit the retraction of the wheel telescopic rod (6).

3. The electric luggage compartment with retractable rear wheels according to claim 1, characterized in that: The rack structure (7) has a toothed section (7-1) at the end of its stroke. The toothed section (7-1) cooperates with the drive gear (5) to limit the extension of the wheel telescopic rod (6).

4. The electric luggage compartment with retractable rear wheels according to claim 1, characterized in that: The rear wheel mounting seat (4) is located on the outer side of the bottom of the housing (1). The rear wheel mounting seat (4) has outwardly extending side wings (4-1) on the front and rear sides of the top. The rear wheel mounting seat (4) is installed to the bottom of the housing (1) through the side wings (4-1). The motor (2) is installed on the inner side of the bottom of the housing (1) through the bracket (9). The drive gear (5) is installed on the motor shaft of the motor (2).

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