Electric luggage case with adjustable distance between rear wheels

Abstract

The utility model relates to an electric luggage case, in particular to an electric luggage case with an adjustable distance between rear wheels, which comprises a front handlebar assembly and a case body assembly, a front wheel is arranged at the bottom of the front handlebar assembly, the front handlebar assembly is rotatably mounted in front of the case body assembly and used for steering of the front wheel, and a left rear wheel and a right rear wheel are arranged at the bottom of the case body assembly. The left side and the right side of the bottom of the box body assembly are each provided with a telescopically-installed wheel stretching-out rod, the left rear wheel and the right rear wheel are installed at the stretching-out ends of the wheel stretching-out rods on the same side, and the wheel stretching-out rods stretch out and draw back under driving of a driving mechanism to drive the rear wheels to stretch out towards the outer side to be away from the box body or retract towards the inner side to be close to the box body. The utility model has the characteristics of simple structure, small occupied space, convenience in maintenance, smoothness in folding and unfolding and high safety.

Description

Technical Field

[0001] The utility model relates to an electric luggage case, in particular to an electric luggage case with adjustable rear wheel spacing. Background Art

[0002] Electric suitcases have been developed for several years and are loved by more and more people. The rear wheels of existing electric suitcases are mostly fixed. Since the width of the electric suitcase is fixed, the distance between the rear wheels is small when riding, which makes it easy to roll over and has poor safety, especially when turning. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to overcome the problem of poor stability when riding with a fixed rear wheel distance in the prior art, an electric luggage case with adjustable rear wheel distance is provided.

[0004] The technical solution adopted by the utility model to solve its technical problems is: an electric luggage box with adjustable rear wheel spacing, including a front handlebar assembly and a box assembly, the bottom of the front handlebar assembly is provided with a front wheel, the front handlebar assembly is rotatably mounted in front of the box assembly for front wheel steering, the bottom of the box assembly is provided with left and right rear wheels, the left and right sides of the bottom of the box assembly are respectively provided with a telescopically mounted wheel extension rod, the left and right rear wheels are mounted on the extending ends of the wheel extension rod on the same side, the wheel extension rod is extended and retracted under the drive of a driving mechanism, driving the rear wheels to extend outward away from the box or to retract inward close to the box.

[0005] Furthermore, the driving mechanism includes an electric push rod and two left and right connecting rods. The electric push rod is installed on the box assembly. The driving direction of the driving end of the electric push rod is perpendicular to the guide hole. One end of the left and right connecting rods is hingedly connected to the driving end of the electric push rod. The other end of the connecting rod is inclined toward the wheel extension rod on the same side and is hingedly connected to the wheel extension rod on the same side, so as to push the wheel extension rods on the left and right sides to extend and retract through the electric push rod.

[0006] Furthermore, the box assembly includes a box and a rear wheel mounting seat installed at the bottom of the box, the rear wheel mounting seat has a guide hole, the wheel extension rod is slidably set in the guide hole, and the wheel extension rod is retractably installed. The connecting rod is inserted into the rear wheel mounting seat and is hingedly connected to the wheel extension rod.

[0007] Furthermore, the front and rear sides of the top of the rear wheel mounting seat have side wings extending outward, and the rear wheel mounting seat is installed with the box body through the side wings.

[0008] Furthermore, the cross-sections of the guide hole and the wheel extension rod are both rectangular.

[0009] Furthermore, a guide limiting structure is provided between the guide hole and the wheel extension rod to guide and limit the extension of the wheel extension rod.

[0010] The guide limiting structure is as follows: the guide hole and the wheel extension rod are respectively provided with a plurality of limiting grooves and limiting protrusions which are embedded and matched with each other.

[0011] Furthermore, the electric push rod is arranged in a box body, and the bottom of the box body and the rear wheel mounting seat have a clearance groove for the connecting rod to pass through.

[0012] Furthermore, the electric push rod is arranged on the rear side of the box body.

[0013] Furthermore, the electric push rod is installed outside the box and is located at the bottom of the box and in front of the rear wheel mounting seat.

[0014] Furthermore, the driving end of the electric push rod has a connecting hole, the upper part of the connecting rod is provided with an upper mounting hole, and the lower part of the connecting rod is provided with a lower mounting hole. The upper mounting hole and the connecting hole are rotatably connected through a rotating shaft, and the lower mounting hole and the hinge position on the wheel extension rod are rotatably connected through a rotating shaft.

[0015] The beneficial effects of the utility model are as follows: the electric luggage box with adjustable rear wheel spacing has the characteristics of simple structure, small space occupation, easy maintenance, smooth storage and release, and high safety.

[0016] Specifically, the entire rear wheel retraction and extension mechanism (drive mechanism) mainly includes an electric push rod, two connecting rods, a rear wheel mounting seat and two wheel extension rods. When the electric push rod is extended, the connecting rod is pressed to prompt the two wheel extension rods to extend the rear wheels to the outside of the box. After the distance between the rear wheels is enlarged, it is not easy to roll over during riding, and safety is improved; conversely, when the electric push rod is retracted, the connecting rod is pulled to prompt the two wheel extension rods to retract the rear wheels to the inside of the box, the distance between the rear wheels is reduced, and the area occupied by the box is reduced; the fewer the number of overall components, the simpler the subsequent maintenance will be.

[0017] In order to ensure the smooth retraction and extension of the rear wheels, a guide limit structure is designed between the guide hole and the wheel extension rod, making the extension and retraction movement of the wheel extension rod smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of the utility model when the rear wheels are in a retracted state;

[0020] Figure 2 This is a schematic structural diagram of the utility model when the rear wheel is in an unfolded state;

[0021] Figure 3 It is a cross-sectional view of the utility model when the rear wheel is in a retracted state;

[0022] Figure 4 This is a schematic diagram of the structure of the utility model after the wheel extension rod is connected to the drive mechanism;

[0023] Figure 5 It is a structural schematic diagram of the utility model after the wheel extension rod and the rear wheel mounting seat are unfolded and separated.

[0024] In the figure: 1. Box, 2. Guide hole, 3. Wheel extension rod, 4. Electric push rod, 5. Connecting rod, 6. Rear wheel, 7. Wheel mounting hole, 8. Articulation position, 9. Clearance slot, 10. Limiting slot, 11. Limiting protrusion, 12. Rear wheel mounting seat, 13. Connecting hole. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are 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.

[0026] Figures 1 to 5 The electric luggage case with adjustable rear wheel spacing shown in the figure includes a front handlebar assembly and a box assembly. The bottom of the front handlebar assembly has a front wheel, which is rotatably mounted in front of the box assembly for front wheel steering. The bottom of the box assembly has two left and right rear wheels 6. The left and right sides of the bottom of the box assembly each have a telescopically mounted wheel extension rod 3. The end of the extended end of the wheel extension rod 3 is machined with a wheel mounting hole 7. The left and right rear wheels 6 are bolted to the wheel mounting holes 7 at the extended end of the wheel extension rod 3 on the same side. The wheel extension rod 3 is retracted and extended under the drive of the driving mechanism, driving the rear wheels 6 to extend outward away from the box 1 or to retract inward toward the box 1. Specifically:

[0027] The box assembly includes a box 1 and a rear wheel mounting base 12 installed at the bottom of the box 1. The front and rear sides of the top of the rear wheel mounting base 12 have side wings extending outward, and the rear wheel mounting base 12 is installed with the box 1 through the side wings. Specifically, there are mounting holes on the side wings, and the rear wheel mounting base 12 is fixed to the bottom of the box 1 through the mounting holes and screws or rivets or other fasteners passing through the mounting holes; of course, it is not ruled out that the rear wheel mounting base 12 or a similar structure is arranged in the box 1, and the wheel extension rod 3 extends to the outside of the box 1.

[0028] A guide hole 2 is provided on the rear wheel mounting seat 12, and the wheel extension rod 3 is slidably installed in the guide hole 2 for retractable installation of the wheel extension rod 3. The cross sections of the guide hole 2 and the wheel extension rod 3 are both rectangular. In order to ensure the smoothness of the retraction and extension of the rear wheel 6, a guide limiting structure is designed between the guide hole 2 and the wheel extension rod 3 to guide and limit the extension and extension of the wheel extension rod 3, so that the extension and extension action of the wheel extension rod 3 is smoother. Specifically, the guide limiting structure is as follows: the guide hole 2 and the wheel extension rod 3 respectively have a plurality of limiting grooves 10 and limiting protrusions 11 that are embedded in and matched with each other. Specifically, the cross sections of the guide hole 2 and the wheel extension rod 3 are both rectangular, such as Figure 5 The limiting groove 10 shown is an arc-shaped groove, which is located at the four corners of the guide hole 2. The limiting protrusions 11 are arc-shaped protrusions at the four long sides of the wheel extension rod 3. Of course, it is not ruled out that the cross-sections of the guide hole 2 and the wheel extension rod 3 are other shapes. For example, when the cross-section of the guide hole 2 is triangular, the cross-section of the wheel extension rod 3 is also triangular, and the limiting groove 10 and the limiting protrusion 11 are opened at their respective three corner positions.

[0029] The driving mechanism includes an electric push rod 4 and two left and right connecting rods 5. The electric push rod 4 is arranged in the box body 1 and is specifically installed on the rear side of the box body 1. The bottom of the box body 1 and the rear wheel mounting seat 12 have a makeshift groove 9 for the connecting rod 5 to pass through. The driving direction of the driving end of the electric push rod 4 is perpendicular to the guide hole 2. One end of the left and right connecting rods 5 is hingedly connected to the driving end of the electric push rod 4, and the other end of the connecting rod 5 is inclined toward the wheel extension rod 3 on the same side, and is inserted into the rear wheel mounting seat 12 and hingedly connected to the wheel extension rod 3 on the same side, and is used to push the wheel extension rods 3 on the left and right sides to extend and retract through the electric push rod 4. When the driving end of the electric push rod 4 is extended or retracted, the two connecting rods 5 and the guide hole 2 form a triangle with a wider bottom and a narrower top, that is, the angle between the two connecting rods 5 is always greater than 0°.

[0030] The specific installation structure of the electric push rod 4 and the left and right connecting rods 5 is as follows: the driving end of the electric push rod 4 has a connecting hole 13, the upper part of the left and right connecting rods 5 is provided with an upper mounting hole, and the lower part of the left and right connecting rods 5 is provided with a lower mounting hole. The upper mounting hole and the connecting hole 13 are rotatably connected through a rotating shaft, and the lower mounting hole and the hinge position 8 on the wheel extension rod 3 are rotatably connected through a rotating shaft. In order to further reduce the space occupied by the driving mechanism inside the box 1, the connecting rod 5 is preferably made of a metal sheet with a certain thickness.

[0031] In actual use

[0032] When the electric push rod 4 is extended, it presses the connecting rod 5 downward to prompt the wheel extension rod 3 to extend the rear wheel 6 to the outside of the box body 1. After the distance between the rear wheels 6 is expanded, it is not easy to roll over during riding, and safety is improved;

[0033] When the electric push rod 4 is retracted, the wheel extension rod 3 is urged upward by the lifting connecting rod 5 to retract the rear wheels 6 toward the inside of the box 1, and the distance between the rear wheels 6 is shortened, thereby reducing the area occupied by the box 1 outside.

[0034] Of course, the electric push rod 4 can also be installed outside the box body 1 to reduce the occupation of the internal space of the box body 1. The electric push rod 4 is specifically located at the bottom of the box body 1 and in front of the rear wheel mounting seat 12.

[0035] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electric luggage case with adjustable rear wheel spacing, comprising a front handlebar assembly and a case assembly, wherein the front handlebar assembly has a front wheel at the bottom thereof, the front handlebar assembly being rotatably mounted in front of the case assembly for front wheel steering, and the case assembly has two left and right rear wheels at the bottom thereof, characterized in that: There is a telescopic wheel extension rod on each side of the left and right sides of the bottom of the box assembly, and the left and right rear wheels are installed on the extending ends of the wheel extension rod on the same side. The wheel extension rod is extended and retracted under the drive of the driving mechanism, driving the rear wheels to extend outward away from the box or retract inward close to the box.

2. The electric luggage case with adjustable rear wheel spacing according to claim 1, characterized in that: The driving mechanism includes an electric push rod and two left and right connecting rods. The electric push rod is installed on the box assembly. The driving direction of the driving end of the electric push rod is perpendicular to the guide hole. One end of the left and right connecting rods is hingedly connected to the driving end of the electric push rod. The other end of the connecting rod is inclined toward the wheel extension rod on the same side and is hingedly connected to the wheel extension rod on the same side, so as to push the wheel extension rods on the left and right sides to extend and retract through the electric push rod.

3. The electric luggage case with adjustable rear wheel spacing according to claim 2, characterized in that: The box assembly includes a box and a rear wheel mounting seat installed at the bottom of the box. The rear wheel mounting seat has a guide hole. The wheel extension rod is slidably set in the guide hole to perform telescopic installation of the wheel extension rod. The connecting rod is inserted into the rear wheel mounting seat and is hingedly connected to the wheel extension rod.

4. The electric luggage case with adjustable rear wheel spacing according to claim 3, characterized in that: The front and rear sides of the top of the rear wheel mounting seat are provided with side wings extending outwards, and the rear wheel mounting seat is mounted on the box body through the side wings.

5. The electric luggage case with adjustable rear wheel spacing according to claim 3, characterized in that: The cross sections of the guide hole and the wheel extension rod are both rectangular.

6. The electric luggage case with adjustable rear wheel spacing according to claim 3, characterized in that: There is a guide limiting structure between the guide hole and the wheel extension rod to guide and limit the extension of the wheel extension rod. The guide limiting structure is as follows: the guide hole and the wheel extension rod are respectively provided with a plurality of limiting grooves and limiting protrusions which are embedded and matched with each other.

7. The electric luggage case with adjustable rear wheel spacing according to claim 3, characterized in that: The electric push rod is arranged in a box body, and a bottom of the box body and a rear wheel mounting seat are provided with a clearance groove for the connecting rod to pass through.

8. The electric luggage case with adjustable rear wheel spacing according to claim 7, characterized in that: The electric push rod is arranged on the rear side of the box body.

9. The electric luggage case with adjustable rear wheel spacing according to claim 3, characterized in that: The electric push rod is installed outside the box body and is located at the bottom of the box body and in front of the rear wheel mounting seat.

10. The electric luggage case with adjustable rear wheel spacing according to claim 2, characterized in that: The driving end of the electric push rod has a connecting hole, the upper part of the connecting rod is provided with an upper mounting hole, the lower part of the connecting rod is provided with a lower mounting hole, the upper mounting hole and the connecting hole are rotatably connected through a rotating shaft, and the lower mounting hole and the hinge position on the wheel extension rod are rotatably connected through a rotating shaft.

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