Electric luggage case with electrically telescopic rear wheels

Abstract

The utility model relates to an electric luggage case, and provides an electric luggage case with electrically telescopic rear wheels in order to solve the problems that in the prior art, the telescopic structure of the rear wheels of the electric luggage case is complex, and the effective storage space in the case body is insufficient, the electric luggage case with the electrically telescopic rear wheels comprises a front handlebar assembly and a case body assembly, the front handlebar assembly is rotatably installed in front of the box body assembly and used for steering of a front wheel, the bottom of the box body assembly is provided with a left rear wheel and a right rear wheel, the left side and the right side of the bottom of the box body assembly are each provided with a wheel extending rod which can be installed in a telescopic mode, and the left rear wheel and the right rear wheel are installed at the extending ends of the wheel extending rods on the same side; the left wheel extension rod and the right wheel extension rod are driven by the two-way electric lead screw driving mechanism to stretch out and draw back to drive the rear wheels to stretch out towards the outer side to be away from the box body or draw back towards the inner side to be close to the box body, and the bicycle has the advantages of being simple in structure, convenient to maintain, smooth in folding and unfolding, high in safety, high in space utilization rate and good in user experience.

Description

Technical Field

[0001] This utility model relates to electric luggage, and more particularly to an electric luggage with electrically retractable rear wheels. Background Technology

[0002] Electric suitcases have been developing for several years and are becoming increasingly popular. However, existing electric suitcases have the following problems:

[0003] First, the electric telescopic structure of the wheel is complex. For example, the linkage telescopic structure requires the cooperation of the electric cylinder and the linkage to achieve telescopic movement. Sometimes the linkage also adopts a multi-link structure, which is difficult to assemble and can cause jamming and seizing problems during use.

[0004] Secondly, the electric telescopic mechanism requires space inside the suitcase, resulting in insufficient effective storage space for the electric suitcase. Utility Model Content

[0005] The technical problem to be solved by this utility model is: in order to overcome the problems of complex rear wheel telescopic structure and insufficient effective storage space inside the box in the existing electric luggage box, an electric luggage box with electrically telescopic rear wheels is provided.

[0006] The technical solution adopted by this utility model to solve its technical problem is: an electric luggage box with electrically retractable rear wheels, including a front handlebar assembly and a box assembly. The bottom of the front handlebar assembly has a front wheel, and the front handlebar assembly is rotatably mounted in front of the box assembly for front wheel steering. The bottom of the box assembly has two rear wheels, left and right. There is a retractable wheel extension rod on each of the left and right sides of the bottom of the box assembly. The two rear wheels are mounted on the extension ends of the wheel extension rods on the same side. The two wheel extension rods are retracted and extended under the drive of a bidirectional electric screw drive mechanism, causing the rear wheels to extend outward away from the box or retract inward towards the box.

[0007] Furthermore, the housing assembly includes a housing and two rear wheel mounting seats installed at the bottom of the housing. The two rear wheel mounting seats are arranged on the left and right sides of the bottom of the housing. A bidirectional electric screw drive mechanism is located between the two rear wheel mounting seats. The rear wheel mounting seats have guide holes, and the wheel extension rod is slidably disposed in the guide holes for retractable installation of the wheel extension rod.

[0008] The bidirectional electric screw drive mechanism has two drive screws, left and right. The two drive screws extend into the rear wheel mounting seat and wheel extension rod on the same side. The bidirectional electric screw drive mechanism drives the wheel extension rod to extend and retract through the drive screws, and then drives the rear wheel to extend outward away from the housing or retract inward towards the housing through the wheel extension rod.

[0009] Furthermore, the bidirectional electric screw drive mechanism includes a motor, a drive box, two drive screws (left and right) and a nut. The output end of the motor is connected to the drive box, which is located between the left and right rear wheel mounting seats. The output end of the drive box is connected to the ends of the two drive screws. Nuts are fitted on the rods of the two drive screws, and the nuts are connected to the wheel extension rods. The bidirectional electric screw drive mechanism drives the nuts to extend and retract through the drive screws, and then drives the wheel extension rods to extend outward away from the box or retract inward towards the box through the nuts.

[0010] The drive box is fixedly connected to the housing.

[0011] Furthermore, the bidirectional electric screw drive mechanism includes a motor, a drive box, and two drive screws, the output end of the motor is connected to the drive box, the drive box is located between the left and right rear wheel mounting seats, the output end of the drive box is connected to the ends of the left and right drive screws, and the wheel extension rod has an internal thread that engages with the external thread of the drive screw. The bidirectional electric screw drive mechanism drives the wheel extension rod to extend and retract through the drive screw, and then drives the rear wheel to extend outward away from the box or retract inward towards the box through the wheel extension rod.

[0012] The drive box is fixedly connected to the housing.

[0013] Furthermore, the bidirectional electric screw drive mechanism, wheel extension rod, and rear wheel mounting seat are located on the outer side of the bottom of the housing.

[0014] Furthermore, the rear wheel mounting base has outwardly extending side wings on the front and rear sides of its top, and the rear wheel mounting base is installed to the bottom of the housing through the side wings.

[0015] Furthermore, the cross-sections of both the guide hole and the wheel extension rod are rectangular.

[0016] Furthermore, a guide limiting structure is provided between the guide hole and the wheel extension rod to guide and limit the extension and retraction of the wheel extension rod.

[0017] The guide limiting structure has several mutually interlocking limiting grooves and limiting protrusions on the guide hole and the wheel extension rod.

[0018] Furthermore, the housing includes an annular middle frame, a bidirectional electric screw drive mechanism, and a rear wheel mounting base mounted on the annular middle frame.

[0019] Furthermore, the motor is also provided with an outer protective cover, which is directly or indirectly fixedly connected to the bottom of the housing.

[0020] The beneficial effects of this utility model are: This utility model provides an electric luggage box with electrically retractable rear wheels, ensuring that the distance between the rear wheels of the electric luggage box is adjustable.

[0021] The original linkage telescopic mechanism was replaced with a two-way electric screw drive mechanism, which makes the drive more direct and efficient, the extension and retraction smoother, the structure simpler, easier to maintain, and safer.

[0022] Furthermore, the drive mechanism, which was originally installed inside the enclosure, is now located on the outside of the enclosure, eliminating any additional space occupation and increasing the efficient use of space inside the enclosure, thus enhancing the user experience. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 This is a schematic diagram of the structure of the present invention when the rear wheel is in the retracted state;

[0027] Figure 4 This is a structural schematic diagram of the rear wheel of this utility model in the deployed state;

[0028] Figure 5 This is a schematic diagram of the bottom structure of the box body of this utility model;

[0029] Figure 6 This is a side view of the structure of this utility model;

[0030] Figure 7 yes Figure 6 Sectional view at point AA;

[0031] Figure 8 yes Figure 7 Enlarged view of point B in the middle;

[0032] Figure 9 yes Figure 6 A structural diagram after removing the side panels of the enclosure;

[0033] Figure 10 This is a schematic diagram of the structure of the rear wheel, rear wheel mounting seat, bidirectional electric screw drive mechanism, outer cover and liner after assembly of this utility model.

[0034] Figure 11 This is a schematic diagram of the structure of the rear wheel, rear wheel mounting seat, bidirectional electric screw drive mechanism and outer cover after assembly of this utility model;

[0035] Figure 12 This is a schematic diagram of the structure of the wheel extension rod and the rear wheel mounting seat after the present invention is unfolded and separated.

[0036] In the diagram: 1. Front handlebar assembly, 2. Rear wheel, 3. Wheel extension rod, 4. Housing, 5. Rear wheel mounting base, 6. Guide hole, 7. Drive screw, 8. Motor, 9. Drive box, 10. Nut, 11. Outer cover, 12. Side wing, 13. Annular frame, 14. Liner, 15. Limiting groove, 16. Limiting protrusion, 17. Mounting hole, 18. Wheel mounting hole. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0038] Figures 1 to 12 An electric luggage box with electrically retractable rear wheels is shown, comprising a front handlebar assembly 1 and a box assembly. The front handlebar assembly 1 has a front wheel at its bottom and is rotatably mounted in front of the box assembly for front wheel steering. The bottom of the box assembly has two rear wheels 2, one on the left and one on the right. There is a retractable wheel extension rod 3 on each side of the bottom of the box assembly. The wheel extension rod 3 has a wheel mounting hole 18 machined at its extended end. The two rear wheels 2 are bolted to the wheel mounting holes 18 at the extended ends of the wheel extension rods 3 on the same side. The two wheel extension rods 3 extend and retract under the drive of a bidirectional electric screw drive mechanism, causing the rear wheels 2 to extend outward away from the box 4 or retract inward towards the box 4.

[0039] The housing assembly includes a housing 4 and two rear wheel mounting seats 5 installed on the bottom outer side of the housing 4. The two rear wheel mounting seats 5 are arranged on the left and right sides of the bottom of the housing 4. A bidirectional electric screw drive mechanism is located between the two rear wheel mounting seats 5. The rear wheel mounting seats 5 have guide holes 6. The wheel extension rod 3 is slidably installed in the guide holes 6 for telescopic installation. Both the guide holes 6 and the wheel extension rod 3 have rectangular cross sections. A guide limiting structure is designed between the guide holes 6 and the wheel extension rod 3 to guide and limit the extension and retraction of the wheel extension rod 3, making the extension and retraction of the wheel extension rod 3 smoother. Specifically, the guide limiting structure has several mutually interlocking limiting grooves 15 and limiting protrusions 16 on the guide holes 6 and the wheel extension rod 3, such as... Figure 12 The limiting groove 15 shown is an arc-shaped groove, located at the four corners of the guide hole 6. The limiting protrusion 16 is an arc-shaped protrusion at the four long sides of the wheel extension rod 3. Of course, it is also possible that the cross-sections of the guide hole 6 and the wheel extension rod 3 are other shapes. For example, if the cross-section of the guide hole 6 is triangular, the cross-section of the wheel extension rod 3 is also triangular. The limiting groove 15 and the limiting protrusion 16 are opened at their respective three corner positions.

[0040] The bidirectional electric screw drive mechanism has two drive screws 7, one on the left and one on the right. The two drive screws 7 extend into the rear wheel mounting seat 5 and the wheel extension rod 3 on the same side. The bidirectional electric screw drive mechanism drives the wheel extension rod 3 to extend and retract through the drive screws 7, and then drives the rear wheel 2 to extend outward away from the housing 4 or to retract inward towards the housing 4 through the wheel extension rod 3.

[0041] To further improve the space utilization inside the housing 4, the bidirectional electric screw drive mechanism, wheel extension rod 3, and rear wheel mounting seat 5 are all installed on the outer side of the bottom of the housing 4. Of course, it is also possible that the bidirectional electric screw drive mechanism, wheel extension rod 3, and rear wheel mounting seat 5 are installed at the bottom of the inner cavity of the housing, with the wheel extension rod 3 extending out through an opening on the housing 4.

[0042] As shown in Embodiment 1, the bidirectional electric screw drive mechanism includes a motor 8, a drive box 9, two drive screws 7 (left and right), and a nut 10. The output end of the motor 8 is connected to the input end of the drive box 9. The drive box 9 is located between the two rear wheel mounting seats 5. The output end of the drive box 9 is connected to the ends of the two drive screws 7. Nuts 10 are fitted on the rods of the two drive screws 7. The nuts 10 and the inner ends of the wheel extension rods 3 are fixedly connected by screws. The inside of the wheel extension rods 3 is a smooth hole wall. The bidirectional electric screw drive mechanism drives the nuts 10 to extend and retract through the drive screws 7, and then drives the wheel extension rods 3 to extend outward away from the box 4 or retract inward towards the box 4 through the nuts 10.

[0043] The rear wheel mounting base 5 has outwardly extending side wings 12 on the front and rear sides of the top, and the side wings 12 have mounting holes 17. The rear wheel mounting base 5 is fixed to the bottom of the housing 1 or housing 4 through the mounting holes 17 and screws, rivets or other fasteners passing through the mounting holes 17.

[0044] The bidirectional electric screw drive mechanism is fixedly connected to the housing 4 via a drive box 9. Specifically, the drive box 9 and the bottom of the housing 4 are fixedly installed, and the motor 8 is fixedly installed on the drive box 9. The motor 8 has an outer protective cover 11, the front end of which is located below the side wing 12. The outer protective cover 11 and the rear wheel mounting seat 5 are simultaneously fixed to the bottom of the housing 4 with screws. The specific installation position is the bottom of the annular frame 13 of the housing 4. Since the surface of the annular frame 13 has unevenness, a liner 14 is also provided on the bottom of the outer side of the annular frame 13 to facilitate installation and ensure the strength after installation. The bidirectional electric screw drive mechanism, the wheel extension rod 3, and the rear wheel mounting seat 5 are connected to the outer side of the bottom of the housing 4 via the liner 14. Of course, it is also possible that the front end of the outer protective cover 11 is directly fixedly connected to the annular frame 13.

[0045] Example 2

[0046] The difference from Embodiment 1 is that the bidirectional electric screw drive mechanism does not have a nut 10. Specifically, the bidirectional electric screw drive mechanism includes a motor 8, a drive box 9, and two drive screws 7 on the left and right. The output end of the motor 8 is connected to the input end of the drive box 9. The drive box 9 is located between the left and right rear wheel mounting seats 5. The output end of the drive box 9 is connected to the ends of the left and right drive screws 7. The wheel extension rod 3 has an internal thread that engages with the external thread of the drive screw 7. The bidirectional electric screw drive mechanism drives the wheel extension rod 3 to extend and retract through the drive screw 7, thereby driving the rear wheel 2 to extend outward away from the housing 4 or to retract inward towards the housing 4 through the wheel extension rod 3.

[0047] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An electric luggage box with electrically retractable rear wheels, comprising a front handlebar assembly and a box assembly, wherein the bottom of the front handlebar assembly has a front wheel, and the front handlebar assembly is rotatably mounted in front of the box assembly for front wheel steering, characterized in that: The bottom of the box assembly has two rear wheels, left and right. There is a retractable wheel extension rod on each side of the bottom of the box assembly. The two rear wheels are mounted on the extended ends of the wheel extension rods on the same side. The two wheel extension rods extend and retract under the drive of the bidirectional electric screw drive mechanism, causing the rear wheels to extend outward away from the box or retract inward towards the box.

2. The electric luggage box with electrically retractable rear wheels according to claim 1, characterized in that: The housing assembly includes a housing and two rear wheel mounting seats installed at the bottom of the housing. The two rear wheel mounting seats are arranged on the left and right sides of the bottom of the housing. A bidirectional electric screw drive mechanism is located between the two rear wheel mounting seats. The rear wheel mounting seats have guide holes, and the wheel extension rods are slidably disposed in the guide holes for retractable installation of the wheel extension rods. The bidirectional electric screw drive mechanism has two drive screws, left and right. The two drive screws extend into the rear wheel mounting seat and wheel extension rod on the same side. The bidirectional electric screw drive mechanism drives the wheel extension rod to extend and retract through the drive screws, and then drives the rear wheel to extend outward away from the housing or retract inward towards the housing through the wheel extension rod.

3. An electric luggage box with electrically retractable rear wheels according to claim 2, characterized in that: The bidirectional electric screw drive mechanism includes a motor, a drive box, two drive screws (left and right) and a nut. The output end of the motor is connected to the drive box, which is located between the left and right rear wheel mounting seats. The output end of the drive box is connected to the ends of the two drive screws. Nuts are fitted on the rods of the two drive screws, and the nuts are connected to the wheel extension rods. The bidirectional electric screw drive mechanism drives the nuts to extend and retract through the drive screws, and then drives the wheel extension rods to extend outward away from the box or retract inward towards the box through the nuts. The drive box is fixedly connected to the housing.

4. An electric luggage box with electrically retractable rear wheels according to claim 2, characterized in that: The bidirectional electric screw drive mechanism includes a motor, a drive box, and two drive screws (left and right). The output end of the motor is connected to the drive box, which is located between the left and right rear wheel mounting seats. The output end of the drive box is connected to the ends of the two drive screws. The wheel extension rod has an internal thread that engages with the external thread of the drive screw. The bidirectional electric screw drive mechanism drives the wheel extension rod to extend and retract through the drive screw, thereby driving the rear wheel to extend outward away from the box or retract inward towards the box through the wheel extension rod. The drive box is fixedly connected to the housing.

5. An electric luggage box with electrically retractable rear wheels according to claim 2, characterized in that: The bidirectional electric screw drive mechanism, wheel extension rod, and rear wheel mounting seat are located on the outer side of the bottom of the housing.

6. An electric luggage box with electrically retractable rear wheels according to claim 2 or 5, characterized in that: The rear wheel mounting base has outwardly extending side wings on the front and rear sides of its top, and the rear wheel mounting base is installed to the bottom of the housing through the side wings.

7. An electric luggage box with electrically retractable rear wheels according to claim 2, characterized in that: Both the guide hole and the wheel extension rod have rectangular cross-sections.

8. An electric luggage box with electrically retractable rear wheels according to claim 2, characterized in that: A guide and limiting structure is provided between the guide hole and the wheel extension rod to guide and limit the extension and retraction of the wheel extension rod. The guide limiting structure has several mutually interlocking limiting grooves and limiting protrusions on the guide hole and the wheel extension rod.

9. An electric luggage box with electrically retractable rear wheels according to claim 2, characterized in that: The housing includes an annular middle frame, and a bidirectional electric screw drive mechanism and a rear wheel mounting base are mounted on the annular middle frame.

10. An electric luggage box with electrically retractable rear wheels according to claim 3 or 4, characterized in that: The motor is also equipped with an outer protective cover, which is directly or indirectly fixedly connected to the bottom of the housing.

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