Electric luggage case with universal wheels

Abstract

The invention relates to an electric luggage case with universal wheels, which comprises a case body and universal wheels, and the universal wheels are mounted on the case body through a gravity self-locking mounting mechanism; the gravity self-locking mounting mechanism comprises a fixed seat, a rotary lifting seat and an elastic reset mechanism, the rotary lifting seat can rotate and can be inserted into a lifting guide channel of the fixed seat in an up-down telescopic mode, and the fixed seat and the rotary lifting seat are provided with a first annular guide tooth structure and a second annular guide tooth structure respectively. The first annular guide tooth structure and the second guide tooth structure which are meshed are used for positioning the universal wheel; and in a non-riding state, the first annular guide tooth structure is completely separated from the second annular guide tooth structure, so that the universal wheel can freely rotate. The beneficial effects are that the structure is simple and reliable; when a user rides on the suitcase body, the universal wheels are changed into a directional state, the riding stability is guaranteed, and when the user is in a non-riding state, the universal wheels are changed into a universal state, so that the user can drag the electric suitcase conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of electric luggage cases, in particular to an electric luggage case with universal wheels. Background Art

[0002] The wheels at the bottom of ordinary suitcases are universal wheels, which can automatically turn according to the direction of the user's dragging, making it convenient to drag.

[0003] Existing electric suitcases usually include a case body, a front handlebar assembly on the front side of the case body, and a rear wheel at the bottom of the case body. The bottom of the front handlebar assembly has a front wheel. When in riding state, the user rides on the case body to drive the electric suitcase and controls the riding direction by the handlebars on the front handlebar assembly. In order to ensure stable riding, the rear wheel at the bottom of the case body is a directional wheel.

[0004] The problem with this electric suitcase is that when not in the riding state, the rear wheels are directional wheels and cannot automatically turn in the direction of the user's dragging like the universal wheels at the bottom of an ordinary suitcase. It is difficult to turn when towing, which is not conducive to towing the electric suitcase when not in the riding state.

[0005] For this purpose, there is an electric suitcase in the prior art, which has retractable universal wheels in addition to directional rear wheels. When the suitcase is in a riding state, the universal wheels are retracted to avoid interference from the universal wheels. When the suitcase is not in a riding state, the universal wheels are released to prop up the suitcase body, so that the directional rear wheels are off the ground, and the universal wheels automatically turn in the towing direction of the user, making towing convenient.

[0006] However, the retractable universal wheels of the electric luggage case have a complex structure and high cost.

[0007] There is also an electric suitcase in the prior art, in which universal wheels are installed on the rear side of the electric suitcase, and the universal wheels on the rear side are placed on the ground by rotating the direction of the suitcase body, so as to facilitate the user to drag the suitcase.

[0008] However, this electric suitcase is inconvenient to use and unsightly, so users do not like it. Summary of the invention

[0009] The technical problem to be solved by the present invention is that the existing electric luggage case is difficult to turn when being towed, which is not conducive to towing the electric luggage case when not in a riding state.

[0010] The technical solution adopted by the present invention to solve its technical problems is: an electric luggage case with universal wheels, comprising a case body and universal wheels, wherein the universal wheels are mounted on the case body through a gravity self-locking mounting mechanism; the gravity self-locking mounting mechanism comprises a fixed seat, a rotating lifting seat and an elastic reset mechanism, wherein the fixed seat has a lifting guide channel, wherein the rotating lifting seat can be rotatably and telescopically inserted into the lifting guide channel of the fixed seat, wherein the universal wheels are mounted on the rotating lifting seat, and can be universally rotated and telescopically retracted synchronously with the rotating lifting seat, wherein the fixed seat and the rotating lifting seat respectively have a first annular guide tooth structure and a second annular guide tooth structure which can be aligned and meshed with each other up and down, wherein the number of teeth of the guide teeth of the first annular guide tooth structure and the second annular guide tooth structure is 2, and the second annular guide tooth structure has two meshing angles, wherein the second annular guide tooth structure is at the meshing angle when the universal wheel rotates to the front and rear directions, and the tooth surface of the guide tooth is a guide surface, and is used to drive the second annular guide tooth structure to rotate during the alignment and meshing process of the first annular guide tooth structure and the second annular guide tooth structure. to the meshing angle, or the number of teeth of the guide teeth of the first annular guide tooth structure and the second annular guide tooth structure is 1, which is used to make the second annular guide tooth structure have only one meshing angle, and when the universal wheel rotates to the forward or backward direction, the second annular guide tooth structure is at the meshing angle; the elastic reset mechanism acts on the rotating lifting seat and the fixed seat respectively, and the elastic reset force of the elastic reset mechanism is less than the bearing force of the box body in the riding state, and is greater than the bearing force of the box body in the non-riding state; in the riding state, the bearing force of the box body pushes the fixed seat to overcome the elastic reset force of the elastic reset mechanism and decrease, so that the first annular guide tooth structure approaches the second annular guide tooth structure, and performs up and down alignment until it is fully meshed, and the meshed first annular guide tooth structure and the second guide tooth structure position the universal wheel; in the non-riding state, the elastic reset force of the elastic reset mechanism pushes the rotating lifting seat to overcome the bearing force of the box body and extend downward until the first annular guide tooth structure is completely separated from the second annular guide tooth structure, so that the universal wheel can rotate freely in the non-riding state.

[0011] In some embodiments, optionally, the front side of the box has a front handlebar assembly, the bottom of the front handlebar assembly has a front wheel, and there are two universal wheels, which are arranged on the left and right sides of the rear of the bottom of the box; the elastic reset mechanism is specifically a spring; the first annular guide tooth structure and the second annular guide tooth structure are tooth root structures or tooth root-free structures.

[0012] In some embodiments, optionally, the first annular guide tooth structure is fixed on the fixing seat by side fixing or end fixing, and the second annular guide tooth structure is fixed on the rotating lifting seat by side fixing or end fixing.

[0013] In some embodiments, optionally, the rotary lifting seat includes a base and a shaft extending upward from the base, the lifting guide channel in the fixed seat has a step surface, the first annular guide tooth structure is fixed to the step surface in the lifting guide channel by an end fixing method, the second annular guide tooth structure is fixed to the base by an end fixing method, and the elastic reset mechanism is specifically a spring, and the two ends of the spring act on the rotary lifting seat and the fixed seat respectively.

[0014] In some embodiments, optionally, the first annular guide tooth structure is fixed on the fixed seat in one piece or in two pieces, and the second annular guide tooth structure is fixed on the rotating lifting seat in one piece or in two pieces.

[0015] In some embodiments, optionally, a clearance hole is provided on the upper end surface of the base, the second annular guide tooth structure is located at the bottom of the clearance hole, the two ends of the spring are respectively located in the lifting guide channel and the clearance hole of the base, and the two ends of the spring are respectively located outside the first annular guide tooth structure and the second annular guide tooth structure.

[0016] In some embodiments, optionally, a bearing is provided between the rotating lifting seat and the lifting guide channel.

[0017] In some embodiments, optionally, a travel limiting mechanism is provided between the rotary lifting seat and the lifting guide channel, for limiting the maximum travel of the rotary lifting seat extending downward.

[0018] In some embodiments, optionally, the universal wheel is mounted on the rotating lifting base via a wheel axle.

[0019] In some embodiments, optionally, a bearing is provided between the rotary lifting seat and the lifting guide channel, the bearing is specifically located between the shaft of the rotary lifting seat and the lifting guide channel, the bearing is positioned up and down in the lifting guide channel, a stroke limiting mechanism is provided between the rotary lifting seat and the lifting guide channel, for limiting the maximum stroke of the rotary lifting seat extending downward, the stroke limiting mechanism is specifically a limit retaining ring installed at the upper end of the shaft, the limit retaining ring contacts the fixed seat or a fixed component in the fixed seat, for limiting the stroke.

[0020] The beneficial effects of the present invention are: simple structure and high reliability; when a user rides on the box body, the user's weight will cause the universal wheels to change from a universal state to a directional state, thereby ensuring the stability of riding; when in a non-riding state, the user's weight disappears, the universal wheels extend downward to reset, and change from a directional state to a universal state, thereby making it convenient for the user to tow the electric suitcase when not in a riding state. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0022] Figure 1is a schematic diagram of the overall structure of the electric luggage case of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the universal wheel of the present invention being installed on the middle frame of the box body through a gravity self-locking installation mechanism;

[0024] Figure 3 It is a three-dimensional perspective structural schematic diagram of the universal wheel and the gravity self-locking installation mechanism of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the universal wheel and the gravity self-locking installation mechanism of the present invention from a side view;

[0026] Figure 5 yes Figure 4 AA section view;

[0027] Figure 6 yes Figure 5 A cross-sectional view showing the change from a directional state to a universal state;

[0028] Figure 7 It is a structural schematic diagram of the base of the rotary lifting seat of the present invention;

[0029] Figure 8 It is a schematic structural diagram of the fixing seat of the present invention;

[0030] Fig. 9 is a partial cross-sectional view of another rotary lifting seat of the present invention;

[0031] In the figure, 1. box body, 2. universal wheel, 3. fixed seat, 4. rotating lifting seat, 4-1. base, 4-2. shaft, 5. lifting guide channel, 6. first annular guide tooth structure, 7. second annular guide tooth structure, 8. guide tooth, 8-1. tooth surface, 9. front handlebar assembly, 10. front wheel, 11. spring, 12. clearance hole, 13. bearing, 14. axle, 15. limit ring, 16. spacer, 17. retaining spring. DETAILED DESCRIPTION

[0032] like Figures 1 to 8 As shown, an electric luggage case with universal wheels comprises a case body 1 and universal wheels 2, and the universal wheels 2 are mounted on the case body 1 through a gravity self-locking mounting mechanism. The front side of the case body 1 has a front handlebar assembly 9, and the bottom of the front handlebar assembly 9 has a front wheel 10. There are two universal wheels 2, which are arranged on the left and right sides of the rear of the bottom of the case body 1.

[0033] like Figure 2 As shown, the box body 1 includes a middle frame and shells on the left and right sides of the middle frame, and the universal wheel is installed on the middle frame of the box body 1 through a gravity self-locking installation mechanism.

[0034] The gravity self-locking installation mechanism includes a fixed seat 3, a rotating lifting seat 4 and an elastic reset mechanism. The fixed seat 3 has a lifting guide channel 5. The rotating lifting seat 4 can be rotatably and telescopically inserted into the lifting guide channel 5 of the fixed seat 3. The universal wheel 2 is installed on the rotating lifting seat 4 and is synchronously rotated and telescopic with the rotating lifting seat 4. The fixed seat 3 and the rotating lifting seat 4 are respectively provided with a first annular guide tooth structure 6 and a second annular guide tooth structure 7 that can be matched and engaged in an up and down position. The number of teeth of the guide teeth 8 of the first annular guide tooth structure 6 and the second annular guide tooth structure 7 is 2, which is used to make the second annular guide tooth structure 7 have two meshing angles. When the universal wheel 2 rotates to the front and rear directions, the second annular guide tooth structure 7 is at the meshing angle. The tooth surface 8-1 of the guide tooth 8 is a guide surface, which is used to drive the second annular guide tooth structure 7 to rotate to the meshing angle during the up and down alignment and meshing process of the first annular guide tooth structure 6 and the second annular guide tooth structure 7. Of course, it is not excluded that the number of teeth of the guide tooth 8 of the first annular guide tooth structure 6 and the second annular guide tooth structure 7 is 1, so that the second annular guide tooth structure 7 has only one meshing angle. When the universal wheel 2 rotates to the forward or backward direction, the second annular guide tooth structure 7 is at the meshing angle.

[0035] The elastic reset mechanism acts on the rotating lifting seat 4 and the fixed seat 3 respectively, and the elastic reset force of the elastic reset mechanism is smaller than the bearing force of the box body 1 in the riding state, and larger than the bearing force of the box body 1 in the non-riding state.

[0036] like Figure 5 As shown, in the riding state, the bearing force of the box body 1 pushes the fixing seat 3 to overcome the elastic reset force of the elastic reset mechanism, so that the first annular guide tooth structure 6 approaches the second annular guide tooth structure 7, and the upper and lower positions are performed until they are fully meshed. The meshed first annular guide tooth structure 6 and the second guide tooth structure position the universal wheel 2;

[0037] like Figure 6 As shown, in the non-riding state, the elastic reset force of the elastic reset mechanism pushes the rotating lifting seat 4 to overcome the bearing force of the box body 1 and extend downward until the first annular guide tooth structure 6 is completely separated from the second annular guide tooth structure 7, thereby allowing the universal wheel 2 to rotate freely in the non-riding state.

[0038] like Figure 5 , 6 As shown in , 7 and 8, the first annular guide tooth structure 6 and the second annular guide tooth structure 7 are structures with tooth roots, the first annular guide tooth structure 6 is fixed to the fixing seat 3 by an end fixing method, and the second annular guide tooth structure 7 is fixed to the rotating lifting seat 4 by an end fixing method. When the first annular guide tooth structure 6 and the second annular guide tooth structure 7 are structures with tooth roots, it is not excluded that the first annular guide tooth structure 6 and the second annular guide tooth structure 7 can be fixed by a side fixing method.

[0039] Of course, it is not excluded that the first annular guide tooth structure 6 and the second annular guide tooth structure 7 are structures without tooth roots, that is, the guide teeth of the first annular guide tooth structure 6 and the second annular guide tooth structure 7 are independent of each other, and there is no common tooth root between the guide teeth. When the first annular guide tooth structure 6 and the second annular guide tooth structure 7 are structures without tooth roots, the first annular guide tooth structure 6 and the second annular guide tooth structure 7 can be fixed by side fixing. Fig. 9 Another rotary lifting seat 4 of the present invention is shown, in which the second annular guide tooth structure 7 of the rotary lifting seat 4 is a tooth root-free structure, that is, the second annular guide tooth structure 7 is composed of mutually independent guide teeth 8, and the guide teeth 8 have no common tooth root. The guide teeth 8 of the second annular guide tooth structure 7 are fixed by side fixing.

[0040] The rotary lifting seat 4 includes a base 4-1 and a shaft 4-2 extending upward from the base 4-1. The lifting guide channel 5 in the fixed seat 3 has a step surface. The first annular guide tooth structure 6 is fixed to the step surface in the lifting guide channel 5 in an end-fixed manner. The second annular guide tooth structure 7 is fixed to the base 4-1 in an end-fixed manner. Of course, it is not excluded that the first annular guide tooth structure 6 and the second annular guide tooth structure 7 are independent components, which are separately fixed to the base 4-1 and the fixed seat 3 by fasteners. The elastic reset mechanism is specifically a spring 11, and the two ends of the spring 11 act on the rotary lifting seat 4 and the fixed seat 3 respectively. Specifically, the lower end of the shaft 4-2 is connected to the base 4-1 by a tight fit.

[0041] A clearance hole 12 is provided on the upper end surface of the base 4-1, and the second annular guide tooth structure 7 is located at the bottom of the clearance hole 12. The two ends of the spring 11 are respectively located in the lifting guide channel 5 and the clearance hole 12 of the base 4-1, and the two ends of the spring 11 are respectively located outside the first annular guide tooth structure 6 and the second annular guide tooth structure 7.

[0042] The universal wheel 2 is installed on the rotary lifting seat 4 through the wheel axle 14.

[0043] There is a bearing 13 between the rotating lifting seat 4 and the lifting guide channel 5. The bearing 13 is specifically located between the shaft 4-2 of the rotating lifting seat 4 and the lifting guide channel 5. The bearing 13 is positioned and installed in the lifting guide channel 5 in an up-and-down manner. There is a travel limit mechanism between the rotating lifting seat 4 and the lifting guide channel 5, which is used to limit the maximum travel of the rotating lifting seat 4 extending downward. The travel limit mechanism is specifically a limit retaining ring 15 installed at the upper end of the shaft 4-2. The limit retaining ring 15 contacts the bearing 13 in the fixed seat 3 to limit the travel. The limit retaining ring 15 is specifically fixed to the upper end of the shaft 4-2 by screws. Of course, it is not ruled out that the limit retaining ring 15 contacts the fixed seat or other fixed components in the fixed seat 3 to limit the travel.

[0044] Specifically, there are two upper and lower bearings 13 in the lifting guide channel 5, with a spacer sleeve 16 between the two bearings 13. The lifting guide channel 5 is provided with a retaining spring 17 and a limit step, which are respectively located at the upper and lower ends of the two bearings 13 for upper and lower limit.

[0045] like Figure 5 As shown, when the user rides on the box 1, the bearing force of the box 1 includes the weight of the electric luggage and the weight of the user. The weight of the electric luggage includes the luggage inside. At this time, the bearing force of the box 1 pushes the fixing seat 3 to overcome the elastic reset force of the spring 11, so that the first annular guide tooth structure 6 approaches the second annular guide tooth structure 7, and performs up and down alignment until it is fully meshed. The meshed first annular guide tooth structure 6 and the second guide tooth structure position the universal wheel 2, so that the universal wheel 2 changes from a universal state to a directional state, ensuring the stability of riding. In addition, because the universal wheel 2 can roll forward and backward, the positioning after the universal wheel 2 rotates to the front is the same as the positioning after the universal wheel 2 rotates to the back.

[0046] like Figure 6 As shown, in the non-riding state, the user's weight disappears, and the bearing force on the box body 1 only includes the dead weight of the electric suitcase. Because the elastic restoring force of the spring 11 is greater than the dead weight of the electric suitcase, the spring 11 pushes the rotating lifting seat 4 to overcome the bearing force on the box body 1 and extend downward until the first annular guide tooth structure 6 is completely separated from the second annular guide tooth structure 7, thereby making the universal wheel 2 change from a directional state to a universal state in the non-riding state, making it convenient for the user to drag the electric suitcase in the non-riding state.

Claims

1. An electric suitcase with universal wheels, characterized by: It comprises a box body (1) and a universal wheel (2), wherein the universal wheel (2) is mounted on the box body (1) via a gravity self-locking mounting mechanism; The gravity self-locking installation mechanism comprises a fixed seat (3), a rotating lifting seat (4) and an elastic reset mechanism. The fixed seat (3) has a lifting guide channel (5). The rotating lifting seat (4) is inserted into the lifting guide channel (5) of the fixed seat (3) in a rotatable and telescopic manner. The universal wheel (2) is installed on the rotating lifting seat (4) and is synchronously universally rotated and telescopic with the rotating lifting seat (4). The fixed seat (3) and the rotating lifting seat (4) are respectively provided with a first annular guide tooth structure (6) and a second annular guide tooth structure (7) which can be matched and meshed in an upward and downward manner. The number of teeth of the guide teeth (8) of the first annular guide tooth structure (6) and the second annular guide tooth structure (7) is two, and the second annular guide tooth structure (8) is used to make the second annular guide tooth structure (2) rotate in a vertical direction. The structure (7) has two meshing angles. When the universal wheel (2) rotates to the front and rear directions, the second annular guide tooth structure (7) is at the meshing angle. The tooth surface (8-1) of the guide tooth (8) is a guide surface, which is used to drive the second annular guide tooth structure (7) to rotate to the meshing angle during the upper and lower alignment meshing process of the first annular guide tooth structure (6) and the second annular guide tooth structure (7). Alternatively, the number of teeth of the guide tooth (8) of the first annular guide tooth structure (6) and the second annular guide tooth structure (7) is one, which is used to make the second annular guide tooth structure (7) have only one meshing angle. When the universal wheel (2) rotates to the forward or backward direction, the second annular guide tooth structure (7) is at the meshing angle. The elastic reset mechanism acts on the rotating lifting seat (4) and the fixed seat (3) respectively, and the elastic reset force of the elastic reset mechanism is smaller than the bearing force of the box body (1) in the riding state, and larger than the bearing force of the box body (1) in the non-riding state; When in riding state, the bearing force of the box body (1) pushes the fixing seat (3) to overcome the elastic reset force of the elastic reset mechanism, so that the first annular guide tooth structure (6) approaches the second annular guide tooth structure (7), and performs up and down alignment until it is fully meshed. The meshed first annular guide tooth structure (6) and the second guide tooth structure position the universal wheel (2); In the non-riding state, the elastic reset force of the elastic reset mechanism pushes the rotating lifting seat (4) to overcome the bearing force of the box body (1) and extend downward until the first annular guide tooth structure (6) is completely separated from the second annular guide tooth structure (7), thereby allowing the universal wheel (2) to rotate freely in the non-riding state.

2. The electric luggage case with universal wheels according to claim 1, characterized in that: The front side of the box body (1) is provided with a front handlebar assembly (9), the bottom of the front handlebar assembly (9) is provided with a front wheel (10), and there are two universal wheels (2) which are arranged on the left and right sides of the rear of the bottom of the box body (1); The elastic reset mechanism is specifically a spring (11); The first annular guide tooth structure (6) and the second annular guide tooth structure (7) are structures with tooth roots or structures without tooth roots.

3. The electric luggage case with universal wheels according to claim 1, characterized in that: The first annular guide tooth structure (6) is fixed on the fixed seat (3) by a side fixing method or an end fixing method, and the second annular guide tooth structure (7) is fixed on the rotating lifting seat (4) by a side fixing method or an end fixing method.

4. The electric luggage case with universal wheels according to claim 1, characterized in that: The rotary lifting seat (4) comprises a base (4-1) and a shaft (4-2) extending upward from the base (4-1); a lifting guide channel (5) in the fixed seat (3) has a step surface; a first annular guide tooth structure (6) is fixed to the step surface in the lifting guide channel (5) in an end-fixing manner; a second annular guide tooth structure (7) is fixed to the base (4-1) in an end-fixing manner; and the elastic reset mechanism is specifically a spring (11); two ends of the spring (11) act on the rotary lifting seat (4) and the fixed seat (3) respectively.

5. The electric luggage case with universal wheels according to claim 1, 3 or 4, characterized in that: The first annular guide tooth structure (6) is fixed on the fixed seat (3) in one piece or in two pieces, and the second annular guide tooth structure (7) is fixed on the rotating lifting seat (4) in one piece or in two pieces.

6. The electric luggage case with universal wheels according to claim 4, characterized in that: The upper end surface of the base (4-1) is provided with a clearance hole (12), the second annular guide tooth structure (7) is located at the bottom of the clearance hole (12), the two ends of the spring (11) are respectively located in the lifting guide channel (5) and the clearance hole (12) of the base (4-1), and the two ends of the spring (11) are respectively located outside the first annular guide tooth structure (6) and the second annular guide tooth structure (7).

7. The electric luggage case with universal wheels according to claim 1, characterized in that: A bearing (13) is provided between the rotary lifting seat (4) and the lifting guide channel (5).

8. The electric luggage case with universal wheels according to claim 1, characterized in that: A travel limiting mechanism is provided between the rotary lifting seat (4) and the lifting guide channel (5), which is used to limit the maximum travel of the rotary lifting seat (4) extending downward.

9. The electric luggage case with universal wheels according to claim 1, characterized in that: The universal wheel (2) is installed on the rotating lifting seat (4) via a wheel axle (14).

10. The electric luggage case with universal wheels according to claim 4, characterized in that: A bearing (13) is provided between the rotating lifting seat (4) and the lifting guide channel (5). The bearing (13) is specifically located between the shaft (4-2) of the rotating lifting seat (4) and the lifting guide channel (5). The bearing (13) is positioned and installed in the lifting guide channel (5) in an up-and-down manner. A stroke limiting mechanism is provided between the rotating lifting seat (4) and the lifting guide channel (5) for limiting the maximum stroke of the rotating lifting seat (4) extending downward. The stroke limiting mechanism is specifically a limit retaining ring (15) installed at the upper end of the shaft (4-2). The limit retaining ring (15) contacts the fixed seat (3) or a fixed component in the fixed seat (3) to limit the stroke.

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