Electric luggage case with universal wheels
By automatically adjusting the engagement state of the omnidirectional wheels through a gravity self-locking installation mechanism, the problem of difficulty in steering the electric luggage box when not riding is solved, achieving a balance between riding stability and ease of towing. The structure is simple and the cost is low.
Patent Information
- Application Number
- CN202423263297.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-29
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-29
AI Technical Summary
Existing electric luggage cases are difficult to pull and steer when not in riding mode, and existing solutions are either structurally complex or inconvenient and unsightly to use.
It adopts a gravity self-locking installation mechanism, including a fixed base, a rotating lifting base and an elastic reset mechanism. It automatically adjusts the engagement state of the swivel wheels through changes in gravity, directional when riding and swivel when not riding, ensuring stability and convenience.
It achieves high stability while riding, is easy to tow when not riding, has a simple structure and low cost, and improves the user experience.
Smart Images
Figure CN223489298U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric luggage technology, and in particular to an electric luggage with universal wheels. Background Technology
[0002] The wheels at the bottom of ordinary suitcases are swivel wheels, which can automatically turn according to the user's direction of dragging, making them easy to drag.
[0003] Existing electric luggage boxes typically include a box body, a front handlebar assembly on the front side of the box body, and a rear wheel at the bottom of the box body. The front handlebar assembly has a front wheel at the bottom. When riding, the user rides on the box body to drive the electric luggage box and controls the riding direction through the handlebars on the front handlebar assembly. To ensure riding stability, the rear wheel at the bottom of the box body is a fixed wheel.
[0004] The problem with this type of electric suitcase is that, when not in riding mode, because the rear wheels are fixed wheels, they cannot automatically turn in the direction the user is dragging, unlike the swivel wheels at the bottom of ordinary suitcases. This makes it difficult to turn while dragging, which is not conducive to dragging the electric suitcase when not in riding mode.
[0005] Therefore, there is an existing electric suitcase that, in addition to the directional rear wheel, also has retractable omnidirectional wheels. When riding, the omnidirectional wheels are retracted to avoid interference. When not riding, the omnidirectional wheels are released to support the suitcase body, causing the directional rear wheel to lift off the ground. The omnidirectional wheels automatically turn according to the user's dragging direction, making dragging convenient.
[0006] However, the retractable caster wheels of electric suitcases have a complex structure and high cost.
[0007] There is also an existing type of electric suitcase with casters installed on the rear side. By rotating the suitcase, the casters can be brought to the ground, making it easy for users to drag.
[0008] However, these electric suitcases are inconvenient to use and unattractive, so users don't like them. Utility Model Content
[0009] The technical problem to be solved by this utility model is that existing electric luggage is difficult to turn when being towed, which is not conducive to towing electric luggage when not riding.
[0010] The technical solution adopted by this utility model to solve its technical problem is as follows: an electric suitcase with universal wheels, including a suitcase body and universal wheels, the universal wheels being installed on the suitcase body through a gravity self-locking installation mechanism; the gravity self-locking installation mechanism includes a fixed base, a rotating lifting base, and an elastic reset mechanism, the fixed base having a lifting guide channel, the rotating lifting base being rotatably and retractably inserted into the lifting guide channel of the fixed base, the universal wheels being installed on the rotating lifting base and rotating and retracting synchronously with the rotating lifting base, the fixed base and the rotating lifting base respectively having a first annular guide tooth structure and a second annular guide tooth structure that can be aligned and meshed vertically, the first annular guide tooth structure and the second annular guide tooth structure having two teeth, used to give the second annular guide tooth structure two meshing angles, when the universal wheel rotates to both the front and rear directions, the second annular guide tooth structure is at the meshing angle, the tooth surface of the guide tooth is a guide surface, used to drive the second annular guide tooth structure to rotate during the vertical alignment and meshing process of the first annular guide tooth structure and the second annular guide tooth structure. The first and second annular guide tooth structures each have one tooth, allowing the second annular guide tooth structure to have only one engagement angle. When the omnidirectional wheel rotates to the forward or backward direction, the second annular guide tooth structure is at the engagement angle. The elastic reset mechanism acts on the rotating lifting seat and the fixed seat respectively. The elastic reset force of the elastic reset mechanism is less than the load-bearing force on the box body when riding, but greater than the load-bearing force on the box body when not riding. When riding, the load-bearing force on the box body pushes the fixed seat down against the elastic reset force of the elastic reset mechanism, causing the first annular guide tooth structure to move closer to the second annular guide tooth structure for vertical alignment until fully engaged. The engaged first and second annular guide tooth structures position the omnidirectional wheel. When not riding, the elastic reset force of the elastic reset mechanism pushes the rotating lifting seat down against the load-bearing force on the box body until the first annular guide tooth structure completely disengages from the second annular guide tooth structure, allowing the omnidirectional wheel to rotate freely when not riding.
[0011] In some embodiments, optionally, the front side of the housing has a front handlebar assembly, the bottom of the front handlebar assembly has a front wheel, and there are two casters, which are arranged on the left and right sides of the rear of the bottom of the housing; the elastic reset mechanism is specifically a spring; the first annular guide tooth structure and the second annular guide tooth structure are toothed structures or toothless structures.
[0012] In some embodiments, the first annular guide tooth structure is optionally fixed to the fixed seat by a side fixing method or an end fixing method, and the second annular guide tooth structure is fixed to the rotary lifting seat by a side fixing method or an end fixing method.
[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 stepped surface. The first annular guide tooth structure is fixed to the stepped 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. The elastic reset mechanism is specifically a spring, with the two ends of the spring acting on the rotary lifting seat and the fixed seat respectively.
[0014] In some embodiments, optionally, the first annular guide tooth structure is integrally or separately fixed to the fixed base, and the second annular guide tooth structure is integrally or separately fixed to the rotating lifting base.
[0015] In some embodiments, optionally, the upper end face of the base has a clearance hole, 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 limit mechanism is provided between the rotary lifting seat and the lifting guide channel to limit the maximum downward extension stroke of the rotary lifting seat.
[0018] In some embodiments, optionally, the casters are mounted on the rotating lifting base via axles.
[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 vertically positioned and installed in the lifting guide channel. A travel limiting mechanism is provided between the rotary lifting seat and the lifting guide channel to limit the maximum downward extension of the rotary lifting seat. The travel limiting mechanism is specifically a limiting retaining ring installed at the upper end of the shaft. The limiting retaining ring contacts the fixed seat or the fixed component in the fixed seat to limit the travel.
[0020] The beneficial effects of this utility model are: simple structure and high reliability; when the user is riding on the box, the user's weight will cause the universal wheels to change from a universal state to a directional state, ensuring the stability of riding; when not riding, the user's weight disappears, the universal wheels extend downwards and reset, changing from a directional state to a universal state, making it convenient for the user to drag the electric suitcase when not riding. Attached Figure Description
[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments;
[0022] Figure 1This is a schematic diagram of the overall structure of the electric luggage box of this utility model;
[0023] Figure 2 This is a schematic diagram of the structure of the universal wheel of this utility model, which is installed on the middle frame of the box through a gravity self-locking installation mechanism;
[0024] Figure 3 This is a three-dimensional structural diagram of the universal wheel and gravity self-locking installation mechanism of this utility model;
[0025] Figure 4 This is a side view structural diagram of the universal wheel and gravity self-locking mounting mechanism of this utility model;
[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 gimbaled state;
[0028] Figure 7 This is a schematic diagram of the structure of the base of the rotating lifting seat of this utility model;
[0029] Figure 8 This is a structural schematic diagram of the fixing base of this utility model;
[0030] Figure 9 This is a partial sectional view of another rotary lifting seat of this utility model;
[0031] In the diagram, 1. Box body, 2. Casters, 3. Fixed base, 4. Rotary lifting base, 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. Limiting ring, 16. Spacer, 17. Snap ring. Detailed Implementation
[0032] like Figures 1-8 As shown, an electric luggage case with omnidirectional wheels includes a case body 1 and omnidirectional wheels 2. The omnidirectional wheels 2 are mounted on the case body 1 by 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 omnidirectional wheels 2, which are arranged on the left and right sides at the rear of the bottom of the case body 1.
[0033] like Figure 2 As shown, the housing 1 includes a middle frame and shells on the left and right sides of the middle frame. The casters are mounted on the middle frame of the housing 1 by a gravity self-locking mounting mechanism.
[0034] The gravity self-locking installation mechanism includes a fixed base 3, a rotating lifting base 4, and an elastic reset mechanism. The fixed base 3 has a lifting guide channel 5. The rotating lifting base 4 is rotatably and retractably inserted into the lifting guide channel 5 of the fixed base 3. The universal wheel 2 is installed on the rotating lifting base 4 and rotates and retracts synchronously with the rotating lifting base 4. The fixed base 3 and the rotating lifting base 4 respectively have a first annular guide tooth structure 6 and a second annular guide tooth structure 7 that can be aligned and meshed vertically. The guide teeth 8 of the first annular guide tooth structure 6 and the second annular guide tooth structure 7 have two teeth, which are 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 in 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 vertical alignment and meshing process of the first annular guide tooth structure 6 and the second annular guide tooth structure 7. Of course, it is also possible that the number of guide teeth 8 in 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. The elastic reset force of the elastic reset mechanism is less than the load-bearing force of the box 1 when riding, but greater than the load-bearing force of the box 1 when not riding.
[0036] like Figure 5 As shown, when riding, the load-bearing force on the housing 1 pushes the fixed seat 3 to overcome the elastic reset force of the elastic reset mechanism and drop, causing the first annular guide tooth structure 6 to move closer to the second annular guide tooth structure 7, and perform upper and lower alignment until fully engaged. The engaged first annular guide tooth structure 6 and second guide tooth structure 7 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 load-bearing force on the housing 1 and extend downward until the first annular guide tooth structure 6 completely disengages 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 Figures 7 and 8, the first annular guide tooth structure 6 and the second annular guide tooth structure 7 are toothed structures. The first annular guide tooth structure 6 is fixed to the fixed base 3 by an end fixing method, and the second annular guide tooth structure 7 is fixed to the rotating lifting base 4 by an end fixing method. When the first annular guide tooth structure 6 and the second annular guide tooth structure 7 are toothed structures, it is also possible 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's also possible that the first annular guide tooth structure 6 and the second annular guide tooth structure 7 are rootless structures, meaning 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 rootless structures, the first annular guide tooth structure 6 and the second annular guide tooth structure 7 can be fixed by a side-fixing method. For example... Figure 9 The present invention shows another type of rotary lifting seat 4. The second annular guide tooth structure 7 of the rotary lifting seat 4 is a tooth rootless structure, that is, the second annular guide tooth structure 7 is composed of mutually independent guide teeth 8, and there is no common tooth root between the guide teeth 8. The guide teeth 8 of the second annular guide tooth structure 7 are fixed by side fixing.
[0040] The rotating 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 within the fixed seat 3 has a stepped surface. The first annular guide tooth structure 6 is integrally fixed to the stepped surface within the lifting guide channel 5 using an end-fixing method, and the second annular guide tooth structure 7 is integrally fixed to the base 4-1 using an end-fixing method. Alternatively, the first annular guide tooth structure 6 and the second annular guide tooth structure 7 may be independent components, separately fixed to the base 4-1 and the fixed seat 3 using fasteners. The elastic reset mechanism is specifically a spring 11, with both ends of the spring 11 acting on the rotating 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 via a tight fit.
[0041] The upper surface of the base 4-1 has 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.
[0042] The caster wheel 2 is mounted on the rotating lifting seat 4 via the axle 14.
[0043] A bearing 13 is provided between the rotating lifting seat 4 and the lifting guide channel 5. Specifically, the bearing 13 is located between the shaft 4-2 of the rotating lifting seat 4 and the lifting guide channel 5. The bearing 13 is vertically positioned within the lifting guide channel 5. A travel limiting mechanism is provided between the rotating lifting seat 4 and the lifting guide channel 5 to limit the maximum downward extension of the rotating lifting seat 4. Specifically, the travel limiting mechanism is a retaining ring 15 installed at the upper end of the shaft 4-2. The retaining ring 15 contacts the bearing 13 within the fixed seat 3 to limit the travel. The retaining ring 15 is specifically fixed to the upper end of the shaft 4-2 with screws. Alternatively, the retaining ring 15 may contact the fixed seat or other fixed components within the fixed seat 3 to limit the travel.
[0044] The lifting guide channel 5 contains two bearings 13, one above the other, with a spacer 16 between them. The lifting guide channel 5 also contains a retaining spring 17 and a limiting step, which are located at the upper and lower ends of the two bearings 13, respectively, for upper and lower limiting.
[0045] like Figure 5 As shown, when the user rides on the box 1, the load-bearing force on the box 1 includes the weight of the electric luggage and the user's weight. The weight of the electric luggage includes the luggage inside. At this time, the load-bearing force on the box 1 pushes the fixed seat 3 to overcome the elastic restoring force of the spring 11 and descend, causing the first annular guide tooth structure 6 to move closer to the second annular guide tooth structure 7, achieving vertical alignment until fully engaged. The engaged first annular guide tooth structure 6 and the second guide tooth structure position the omnidirectional wheel 2, changing the omnidirectional wheel 2 from an omnidirectional state to a directional state, ensuring riding stability. In addition, because the omnidirectional wheel 2 can roll back and forth, the positioning after the omnidirectional wheel 2 rotates to the front is the same as the positioning after the omnidirectional wheel 2 rotates to the rear.
[0046] like Figure 6 As shown, when not riding, the user's weight disappears, and the load-bearing force on the box 1 only includes the weight of the electric luggage. Because the elastic restoring force of the spring 11 is greater than the weight of the electric luggage, the spring 11 pushes the rotating lifting seat 4 to overcome the load-bearing force on the box 1 and extend downward until the first annular guide tooth structure 6 completely disengages from the second annular guide tooth structure 7. This causes the universal wheel 2 to change from a directional state to a universal state when not riding, making it convenient for the user to drag the electric luggage when not riding.
Claims
1. An electric suitcase with omnidirectional wheels, characterized in that: It includes a housing (1) and casters (2), wherein the casters (2) are mounted on the housing (1) by a gravity self-locking mounting mechanism; The gravity self-locking installation mechanism includes a fixed base (3), a rotating lifting base (4), and an elastic reset mechanism. The fixed base (3) has a lifting guide channel (5). The rotating lifting base (4) is rotatably and retractably inserted into the lifting guide channel (5) of the fixed base (3). The casters (2) are mounted on the rotating lifting base (4) and rotate and retract synchronously with the rotating lifting base (4). The fixed base (3) and the rotating lifting base (4) respectively have a first annular guide tooth structure (6) and a second annular guide tooth structure (7) that can be aligned and meshed vertically. The guide teeth (8) of the first annular guide tooth structure (6) and the second annular guide tooth structure (7) have two teeth, which are used to make the second annular guide tooth mesh. 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 in 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 and 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 1, 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 in the meshing angle. The elastic reset mechanism acts on the rotating lifting seat (4) and the fixed seat (3) respectively. The elastic reset force of the elastic reset mechanism is less than the load-bearing force of the box (1) when riding, and greater than the load-bearing force of the box (1) when not riding. When riding, the load-bearing force of the box (1) pushes the fixed seat (3) to overcome the elastic reset force of the elastic reset mechanism and drop, so that the first ring guide tooth structure (6) moves closer to the second ring guide tooth structure (7) to perform upper and lower alignment until fully engaged. The engaged first ring guide tooth structure (6) and second guide tooth structure position the universal wheel (2). When not in riding mode, the elastic reset force of the elastic reset mechanism pushes the rotating lifting seat (4) to overcome the load on the housing (1) and extend downward until the first annular guide tooth structure (6) completely disengages from the second annular guide tooth structure (7), thereby allowing the universal wheel (2) to rotate freely when not in riding mode.
2. The electric suitcase with casters according to claim 1, characterized in that: The front side of the box (1) has a front handlebar assembly (9), the bottom of the front handlebar assembly (9) has a front wheel (10), and there are two casters (2), which are arranged on the left and right sides of the rear of the bottom of the box (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 either toothed or toothless structures.
3. The electric suitcase with casters according to claim 1, characterized in that: The first annular guide tooth structure (6) is fixed to the fixed seat (3) by side fixing or end fixing, and the second annular guide tooth structure (7) is fixed to the rotating lifting seat (4) by side fixing or end fixing.
4. The electric suitcase with casters according to claim 1, characterized in that: 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) inside the fixed seat (3) has a stepped surface. The first annular guide tooth structure (6) is fixed to the stepped surface inside the lifting guide channel (5) by end fixing. The second annular guide tooth structure (7) is fixed to the base (4-1) by end fixing. The elastic reset mechanism is specifically a spring (11). The 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 casters according to claim 1, 3, or 4, characterized in that: The first annular guide tooth structure (6) is fixed integrally or separately on the fixed base (3), and the second annular guide tooth structure (7) is fixed integrally or separately on the rotating lifting base (4).
6. The electric suitcase with casters according to claim 4, characterized in that: The upper surface of the base (4-1) has 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 suitcase with casters according to claim 1, characterized in that: The rotary lifting seat (4) and the lifting guide channel (5) are provided with a bearing (13).
8. The electric suitcase with casters according to claim 1, characterized in that: The rotary lifting seat (4) and the lifting guide channel (5) are provided with a travel limit mechanism to limit the maximum downward extension of the rotary lifting seat (4).
9. The electric suitcase with casters according to claim 1, characterized in that: The caster wheel (2) is mounted on the rotating lifting seat (4) via axle (14).
10. The electric suitcase with casters according to claim 4, characterized in that: A bearing (13) is provided between the rotary lifting seat (4) and the lifting guide channel (5). The bearing (13) is specifically located between the shaft (4-2) of the rotary lifting seat (4) and the lifting guide channel (5). The bearing (13) is vertically positioned and installed in the lifting guide channel (5). A stroke limiting mechanism is provided between the rotary lifting seat (4) and the lifting guide channel (5) to limit the maximum downward stroke of the rotary lifting seat (4). The stroke limiting mechanism is specifically a limiting retaining ring (15) installed at the upper end of the shaft (4-2). The limiting retaining ring (15) contacts the fixed seat (3) or the fixed component in the fixed seat (3) to limit the stroke.