Wheel assembly of portable equipment and portable equipment

Abstract

The utility model relates to a wheel assembly of portable equipment and the portable equipment. When the portable equipment needs to be used on a special road surface, the first hub and the second hub are connected through the connecting piece, so that the first moving wheel is installed outside the second moving wheel, and the first moving wheel can replace the second moving wheel to drive the portable equipment to move due to the fact that the diameter of the first tire is larger than that of the second tire; due to the fact that the tread of the first tire is larger than that of the second tire, the first moving wheel can be applied to various special road surfaces, the wheel can conveniently move outdoors, meanwhile, due to the fact that the first moving wheel and the second moving wheel are detachably connected through the connecting piece, storage is convenient, and the occupied space of the portable equipment is reduced.

Description

Technical Field

[0001] This application relates to the field of portable device technology, and more particularly to a wheel assembly for a portable device and a portable device. Background Technology

[0002] Existing portable refrigerators are designed with small wheels for easy movement. The original small wheels are fine for use on flat surfaces and indoors, but when moving on special surfaces such as beaches, sandy areas, and grassy areas outdoors, the small wheels will get stuck in the sand and grass, making movement very difficult and inconvenient.

[0003] Therefore, how to facilitate the movement of wheels outdoors is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] This application provides a wheel assembly for a portable device and a portable device for facilitating outdoor movement of the wheel.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A wheel assembly for a portable device includes a first movable wheel and a second movable wheel;

[0007] The first movable wheel includes a first hub, a connector and a first tire, and the first hub is provided with at least one first mounting hole;

[0008] The second movable wheel includes a second hub and a second tire. The second tire is fitted onto the outside of the second hub. The second hub is provided with at least one second mounting hole along the axial direction. The first mounting hole and the second mounting hole are provided in a one-to-one correspondence.

[0009] The connector detachably connects the first wheel hub and the second wheel hub through the first mounting hole and the second mounting hole; when the first wheel hub and the second wheel hub are connected, the first tire is in contact with the ground; when the first wheel hub and the second wheel hub are detached, the second tire is in contact with the ground.

[0010] The first tire is fitted onto the outside of the first rim, and the diameter of the first tire is larger than the diameter of the second tire, and the tread of the first tire is larger than the tread of the second tire.

[0011] Optionally, in the wheel assembly of the portable device described above, the connector includes a captive screw, the captive screw having a threaded end and a smooth end, the sidewall of the first mounting hole having a threaded structure, the sidewall of the second mounting hole having an embedded nut, the threaded end cooperating with the threaded structure and the embedded nut, and the smooth end being connected to a handle.

[0012] Optionally, in the wheel assembly of the portable device described above, the first wheel is provided with three first mounting holes, the second hub is provided with three second mounting holes, and the connector includes three captive screws to allow the first hub and the second hub to be detachably connected.

[0013] The three first mounting holes can be connected to form an equilateral triangle, and the center of the equilateral triangle coincides with the axis of the first hub. The depth of the first mounting holes is set along the axial direction of the first hub. The three second mounting holes can form another equilateral triangle, and the center of the other equilateral triangle coincides with the axis of the second hub. The depth of the second mounting holes is set along the axial direction of the second hub.

[0014] Optionally, in the wheel assembly of the portable device described above, the hardness of the first moving wheel is less than the hardness of the second moving wheel.

[0015] Optionally, in the wheel assembly of the portable device described above, the first movable wheel is an inflatable wheel, the first tire includes an inner tube and an outer tire, the inner tube is connected to the first wheel hub, and the outer tire is fitted over the inner tube;

[0016] The first movable wheel also includes an air inflator, which is inserted into the first wheel hub, with one end of the air inflator protruding from the outer surface of the first wheel hub and the other end of the air inflator communicating with the inner tube;

[0017] Alternatively, the first movable wheel may be a one-piece molded foam wheel.

[0018] Optionally, in the wheel assembly of the portable device described above, the first wheel hub is provided with at least one first insertion part on the side near the second wheel hub, and the second wheel hub is provided with at least one second insertion part on the side near the first wheel hub, and the first insertion part and the second insertion part are connected by insertion.

[0019] Optionally, in the wheel assembly of the portable device described above, the first wheel hub has a plurality of grooves on the side near the second wheel hub, at least one first insertion part is arranged inside the same groove, and the first insertion part protrudes from the bottom of the groove. The second wheel hub has a plurality of dividing ribs extending axially along the second wheel hub on the side near the first wheel hub, and the second insertion part is a cavity formed by the dividing ribs.

[0020] Optionally, in the wheel assembly of the portable device described above, the wheel assembly further includes an end cap, the end cap being provided with a snap-fit ​​portion, a first connecting portion being provided on the side of the first wheel hub away from the second wheel hub, and a second connecting portion being provided on the side of the second wheel hub close to the first wheel hub.

[0021] When the first movable wheel and the second movable wheel are assembled, the snap-fit ​​part is connected to the first connecting part so that the end cap is connected to the first movable wheel;

[0022] When the first and second movable wheels are disassembled, the snap-fit ​​part connects with the second connecting part so that the end cap connects with the two movable wheels.

[0023] The wheel assembly for portable devices provided by this utility model allows for the connection of a first wheel hub and a second wheel hub using a connector when the portable device needs to be used on special road surfaces. This allows the first movable wheel to be mounted on the outside of the second movable wheel. Because the diameter of the first tire is larger than that of the second tire, the first movable wheel can take over the movement of the portable device. Because the tread of the first tire is larger than that of the second tire, the first movable wheel can be used on various special road surfaces, facilitating outdoor movement of the wheel. Furthermore, the larger tread and diameter of the first tire allow the wheel assembly to be used on complex or bumpy roads without easily getting stuck, increasing the wheel assembly's passability on complex roads, preventing damage to the portable device, and extending its service life. Simultaneously, because the first and second movable wheels are detachably connected via the connector, they are easy to store, reducing the space occupied by the portable device.

[0024] This application also provides a portable device, including a device body and a wheel assembly as described in any of the above embodiments, wherein the first movable wheel and the second movable wheel are detachably connected, and the wheel assembly is connected to the device body to enable the device body to move.

[0025] Optionally, in the above-mentioned portable device, the portable device includes two sets of wheel assemblies; the first movable wheels of the two sets of wheel assemblies are disposed opposite to each other on one side of the portable device body, the portable device body includes two oppositely disposed connecting holes, and the two connecting holes are disposed on the side of the portable device away from the wheel assemblies, the portable device also includes a bracket, and the two ends of the bracket are respectively engaged or rotatably connected to the two connecting holes;

[0026] When the first movable wheel of the wheel assembly is connected to the second movable wheel, and the bracket is connected to the connection hole, the portable device is placed horizontally.

[0027] The portable device provided by this utility model adopts all the technical solutions of all the above embodiments, and therefore has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Attached Figure Description

[0028] The accompanying drawings, incorporated in and forming part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort. One or more embodiments are illustrated by way of example through the corresponding images in the accompanying drawings. These exemplary descriptions do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the figures in the drawings do not constitute a limitation on scale.

[0029] Figure 1 A schematic diagram of the structure of a portable device provided in an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the structure of the bracket provided in the embodiments of this application;

[0031] Figure 3 This is a schematic diagram of the structure of the first movable wheel provided in an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the structure of the polyurethane foam wheel provided in the embodiments of this application;

[0033] Figure 5 A schematic diagram illustrating the engagement of the first insertion part and the second hub in an embodiment of this application;

[0034] Figure 6 This is a schematic diagram of the structure of the second wheel hub provided in an embodiment of this application;

[0035] Figure 7 This is a schematic diagram of the end cap structure provided in an embodiment of this application;

[0036] Figure 8 This is a schematic diagram of the groove structure provided in an embodiment of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100 portable devices;

[0039] First movable wheel 200, first wheel hub 201, connector 202, first tire 203, air inflator 204, first insertion part 205, groove 206, first connecting part 207, handle 208;

[0040] Second movable wheel 300, second wheel hub 301, fixing screw 302, embedded nut 303, second plug-in part 304, second connecting part 305, dividing rib 306, second tire 307;

[0041] Polyurethane foam wheel 400, end cap 500, snap-fit ​​part 501, bracket 600, connecting hole 601. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0044] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0045] See Figure 1 , Figure 3 and Figure 6 This application provides a wheel assembly for a portable device, including a first movable wheel 200 and a second movable wheel 300. The first movable wheel 200 includes a first hub 201, a connector 202, and a first tire 203. The first hub 201 has at least one first mounting hole along the axial direction. The second movable wheel 300 includes a second hub 301 and a second tire 307. The second tire 307 is fitted onto the outside of the second hub 301. The second hub 301 has at least one second mounting hole along the axial direction. The mounting holes are set one-to-one. The connector 202 detachably connects the first wheel hub 201 and the second wheel hub 301 through the first mounting hole and the second mounting hole. The diameter of the first tire 203 is larger than the diameter of the second tire 307, and the tread of the first tire 203 is larger than the tread of the second tire 307. When the first wheel hub 201 and the second wheel hub 301 are connected, the first tire 203 is in contact with the ground. When the first wheel hub 201 and the second wheel hub 301 are disconnected, the second tire 307 is in contact with the ground.

[0046] Specifically, when the ground conditions are simple, only the second moving wheel 300 with a smaller tread and smaller diameter needs to be in working condition. When the road conditions are poor and the ground conditions are complex, the first moving wheel 200 and the second moving wheel 300 are assembled together. The first moving wheel 200 with a larger diameter and wider tread directly acts on the ground and is in working condition, replacing the second moving wheel 300 to drive the equipment with the wheel assembly to move. At this time, the second moving wheel 300 is suspended above the ground.

[0047] Specifically, the first wheel hub 201 and the second wheel hub 301 can be detachably connected through the connector 202.

[0048] Specifically, the second movable wheel 300 is an original part of the portable device 100. Indoors or on flat roads, the second hub 301 and the second tire 307 can be used. When a tire with a large contact area is needed on complex outdoor roads, the first movable wheel 200 can be added on the basis of the second movable wheel 300, and the first hub 201 and the first tire 203 can be used.

[0049] Specifically, the first movable wheel 200 is installed on the second movable wheel 300, so that the second movable wheel 300 does not need to be removed to install the first movable wheel 200 separately, thereby improving the installation and removal efficiency of the first movable wheel 200.

[0050] It should be noted that the fixing screw 302 in the middle of the second hub 301 is connected to the connecting rod between the two second moving wheels 300 of the portable device 100. Preferably, there are three first mounting holes and three second mounting holes, and the second mounting holes are evenly arranged around the fixing screw 302. The positions of the first mounting holes correspond to the positions of the second mounting holes. Specifically, the three first mounting holes can be connected to form an equilateral triangle, and the center of the equilateral triangle coincides with the axis of the first hub. The depth of the first mounting holes is set along the axial direction of the first hub. The three second mounting holes can form another equilateral triangle, and the center of the other equilateral triangle coincides with the axis of the second hub. The depth of the second mounting holes is set along the axial direction of the second hub.

[0051] The wheel assembly of the portable device provided by this utility model allows the first wheel hub 201 and the second wheel hub 301 to be connected by a connector 202 when the portable device 100 needs to be used on special road surfaces. This allows the first movable wheel 200 to be mounted on the outside of the second movable wheel 300. Because the diameter of the first tire 203 is larger than the diameter of the second tire 307, the first movable wheel 200 can take over from the second movable wheel 300 to drive the portable device 100. Because the tread of the first tire 203 is larger than the tread of the second tire 307, the first movable wheel 200 can be applied to various special road surfaces, facilitating outdoor movement of the wheel. At the same time, because the first movable wheel 200 and the second movable wheel 300 are detachably connected by the connector 202, they are easy to store, reducing the space occupied by the portable device 100.

[0052] The connector 202 includes a lock-up screw, which includes a threaded end and a smooth end. The sidewall of the first mounting hole includes a threaded structure, and the sidewall of the second mounting hole includes an embedded nut 303. The threaded end mates with the threaded structure and the embedded nut, and the smooth end is connected to a handle 208.

[0053] Specifically, the first mounting hole is a through hole, and the non-detachable screw and threaded structure are matched to prevent it from falling off and being lost, so as to facilitate the installation of the first wheel hub 201.

[0054] Specifically, in order to reduce the weight of the second moving wheel 300, the interior of the second hub 301 is hollow, the second mounting hole is a hollow cylinder design, and the embedded nut 303 is arranged inside the second mounting hole. The embedded nut 303 and the second hub 301 are integrally formed to enhance the shear resistance of the second moving wheel 300 and improve its structural stability.

[0055] In use, the operator aligns the first hub 201 and the second hub 301, inserts the captive screw into the embedded nut 303, and rotates the captive screw to make it engage with the embedded nut 303 in the first mounting hole and the second mounting hole, thereby achieving a stable connection between the first hub 201 and the second hub 301.

[0056] By using non-detachable screws, the connector 202 is prevented from loosening or falling off during use, simplifying the installation and disassembly process and improving operational efficiency.

[0057] Furthermore, operators can design anti-loosening mechanisms, such as spring washers and locking plates, according to usage needs to further ensure that the connector 202 will not loosen due to vibration during use.

[0058] The lock-on screw includes a threaded end and a smooth end. The threaded end mates with the embedded nut 303 and the threaded structure, while the smooth end is connected to a handle 208.

[0059] Specifically, the threaded end mates with the threaded structure and the embedded nut 303 to achieve the fastening function.

[0060] In use, when installing the first movable wheel 200, the end of the smooth rod can move up and down along the threaded structure to facilitate the first movable wheel 200 to be assembled onto the second movable wheel 300. After ensuring that the first mounting hole and the second mounting hole are aligned, the operator rotates the handle 208 to loosen the screw, thereby achieving a stable connection between the first hub 201 and the second hub 301.

[0061] By arranging handle 208, it is easier for operators to rotate connector 202. By setting smooth rod end and threaded end, it is easy to align and connect the first mounting hole and the second mounting hole, making the screw more stable and less prone to loosening during use.

[0062] It should be noted that, since the first moving wheel 200 needs to replace the second moving wheel 300 for use in various complex outdoor road conditions, the material of the first tire 203 of the first moving wheel 200 needs to be more wear-resistant and tear-resistant. Preferably, the first hub 201 is made of plastic and the first tire 203 is made of rubber. When moving the portable device 100, the outer tire surface of the first moving wheel 200 is relatively soft and has a large contact area with the ground, which can produce a cushioning effect, improve the moving efficiency, and be applied to various special road surfaces.

[0063] In some embodiments, the first movable wheel 200 is an inflatable wheel, the first tire 203 includes an inner tube and an outer tire, the inner tube is connected to the first wheel hub 201, the outer tire is fitted over the inner tube, the first movable wheel 200 also includes an air inflator 204, the air inflator 204 is inserted into the first wheel hub 201, and one end of the air inflator 204 protrudes from the outer surface of the first wheel hub 201, and the other end of the air inflator 204 is connected to the inner tube, or the first movable wheel 200 is an integrally formed foam wheel.

[0064] Specifically, the first tire 203 is designed as a combination of an inner tube and an outer tire, and the air inflator 204 is used to inflate the inner tube.

[0065] Specifically, the first hub 201 is provided with a hole for installing the air inflator 204. When the air inflator 204 is inserted into the hole, it connects to the inner tube from the side of the first hub 201. The operator puts the outer tire on the inner tube and the first hub 201, squeezes and straightens the outer tire and the inner tube, and connects the connector 202 to the first hub 201.

[0066] During use, the operator first checks the tire pressure of the first tire 203. If the tire pressure is low, an air pump is used to inflate the tire using the air inflator 204 before installing the first movable wheel 200. This arrangement provides a more stable tire structure for the first movable wheel 200, enhancing the durability and load-bearing capacity of the first tire 203. The design of the air inflator 204 allows the user to easily adjust the tire pressure of the first tire 203 to adapt to different road conditions, facilitating the movement of the wheel outdoors.

[0067] Furthermore, the first tire 203 can be a tubeless tire, i.e., a fully pneumatic tire, which improves the stability and durability of the tire by strengthening the tire sidewall and sealing performance.

[0068] See Figure 4 In some embodiments, the hardness of the first moving wheel 200 is less than that of the second moving wheel 300. Preferably, the first moving wheel 200 is a polyurethane foam wheel 400, that is, the material of the first moving wheel 200 is polyurethane foam.

[0069] Specifically, polyurethane foam material has good elasticity and wear resistance, providing stable support and cushioning. At the same time, the polyurethane foam wheel 400 eliminates the need for tire pressure checks and inflation, thus omitting the air inflator 204 and simplifying the structure of the first tire 203.

[0070] During use, there is no need to check the tire pressure. The operator simply aligns the connector 202 of the polyurethane foam wheel 400 with the second mounting hole for installation. The use of polyurethane foam material makes the tire lighter, more durable, and adaptable to various complex road conditions, while also facilitating installation.

[0071] To optimize the above technical solution, the first wheel hub 201 and the first tire 203 are integrally formed, which can simplify the production process, reduce the number of parts, reduce production costs, and also help improve the overall performance and structural strength of the product.

[0072] It should be noted that, in order to improve the installation efficiency of the first moving wheel 200, a guide component can be set to guide the installation of the first moving wheel 200, and the specific structure is as follows.

[0073] See Figure 5 In order to optimize the above technical solution, at least one first plug-in portion 205 is provided on the side of the first wheel hub 201 near the second wheel hub 301, and at least one second plug-in portion 304 is provided on the side of the second wheel hub 301 near the first wheel hub 201. The first plug-in portion 205 and the second plug-in portion 304 are plugged into each other.

[0074] Specifically, in order to reduce the weight of the second movable wheel 300, the interior of the second hub 301 is hollow and has dividing ribs 306 inside. While supporting the second movable wheel 300, the interior of the second hub 301 can be divided into multiple cavities, each of which can be used as the second insertion part 304.

[0075] In use, the operator moves the first movable wheel 200 close to the second movable wheel 300, aligns the first insertion part 205 with the second insertion part 304, and at the same time aligns the first mounting hole with the second mounting hole, until the connector 202 mates with the second mounting hole. At this point, the first insertion part 205 is inserted into the interior of the second insertion part 304, thus completing the installation of the first movable wheel 200 and the second movable wheel 300.

[0076] By arranging the first plug-in part 205 and the second plug-in part 304, a more convenient connection method is provided for the first movable wheel 200, improving the efficiency of installation and disassembly. At the same time, the design of the first plug-in part 205 and the second plug-in part 304 makes the connection between the first movable wheel 200 and the second movable wheel 300 more stable, reducing the possibility of loosening or falling off during use, and making it more convenient for outdoor use.

[0077] Furthermore, the first plug-in portion 205 and the second plug-in portion 304 can also be magnetically connected, achieving quick connection and stable fixation of the first plug-in portion 205 and the second plug-in portion 304 through magnetic force.

[0078] See Figure 8 To optimize the above technical solution, the first hub 201 has a plurality of grooves 206 on the side near the second hub 301, and at least one first insertion part 205 is arranged inside the same groove 206, and the first insertion part 205 protrudes from the bottom of the groove 206. The second hub 301 has a plurality of dividing ribs 306 extending axially along the second hub 301 on the side near the first hub 201, and the second insertion part 304 is a cavity formed by the dividing ribs 306.

[0079] Specifically, in order to reduce the weight of the first movable wheel 200, a plurality of grooves 206 are provided on the first side of the first wheel hub 201, and the first insertion part 205 is a hollow structure. Preferably, there are three of each of the first insertion part 205 and the second insertion part 304, and they are evenly arranged around the fixing screw 302.

[0080] Specifically, one or more first insertion parts 205 may be arranged inside the groove 206, and the arrangement position and number of the first insertion parts 205 can be flexibly set according to the usage requirements.

[0081] Specifically, when the second mounting hole is designed as a hollow cylinder, the second mounting hole can be arranged on the groove wall of the groove 206, and the second mounting hole and the first insertion part 205 avoid each other. In order to ensure the structural strength of the second mounting hole and the groove 206, a reinforcing rib can be provided between the groove wall of the groove 206 where the second mounting hole is located and the groove wall of the adjacent groove 206.

[0082] Specifically, the first insertion part 205 and the groove 206 are designed as a single unit.

[0083] Specifically, the position of the groove 206 corresponds to the position of the cavity mentioned above, so as to further improve the insertion effect of the first moving wheel 200 and the second moving wheel 300.

[0084] This arrangement makes the connection between the first insertion part 205 and the second insertion part 304 more concealed, improving the overall aesthetics of the first moving wheel 200, while also providing additional support and stability, and enhancing the connection strength between the first wheel hub 201 and the second wheel hub 301.

[0085] See Figure 7To optimize the above technical solution, the wheel assembly also includes an end cap 500, which is provided with a snap-fit ​​part 501. A first connecting part 207 is provided on the side of the first wheel hub 201 opposite to the second wheel hub 301, and a second connecting part 305 is provided on the side of the second wheel hub 301 close to the first wheel hub 201. When the first moving wheel 200 and the second moving wheel 300 are assembled, the snap-fit ​​part 501 is connected to the first connecting part 207. When the first moving wheel 200 and the second moving wheel 300 are disassembled, the snap-fit ​​part 501 is connected to the second connecting part 305.

[0086] It should be noted that the end cap 500 is a shared end cap 500 for the first moving wheel 200 and the second moving wheel 300. Initially, the end cap 500 is connected to the second hub 301 of the second moving wheel 300, that is, the snap-fit ​​part 501 is connected to the second connecting part 305. When the first moving wheel 200 needs to be added, the operator prys the end cap 500 off the second moving wheel 300, installs the first moving wheel 200 on the second moving wheel 300, and then connects the end cap 500 to the first hub 201, that is, the snap-fit ​​part 501 is switched to be connected to the first connecting part 207.

[0087] Specifically, the snap-fit ​​part 501 is a plug-in rod, which is arranged in a direction perpendicular to the end cover 500. Its first end is connected to the end cover 500, and its second end extends in a direction close to the first hub 201, and its second end hooks back for snapping into the first connecting part 207 or the second connecting part 305.

[0088] Specifically, the number of plug rods is preferably three, the number of grooves 206 is preferably six, the number of cavities is preferably six, the number of first connecting parts 207 is preferably three, and the number of second connecting parts 305 is preferably three.

[0089] Specifically, it is preferable that the first connecting part 207 and the first plug-in part 205 are spaced apart between multiple grooves 206, and it is preferable that the second connecting part 305 and the second plug-in part 304 are spaced apart between multiple cavities, so as to ensure that the first hub 201 and the second hub 301 are subjected to uniform force and to ensure their structural strength.

[0090] Specifically, a support rib is provided between the plug rod and the end cap 500. The support rib is used to ensure the stability of the plug rod's insertion with the first connecting part 207 or the second connecting part 305.

[0091] Specifically, the first connecting part 207 and the second connecting part 305 have the same structure. The second connecting part 305 includes a guide plate for inserting the plug rod and guiding the plug rod, and a snap-fit ​​plate for snapping the second end (hook-back part) of the plug rod.

[0092] The design of the end cap 500 makes the structure of the first moving wheel 200 more complete and aesthetically pleasing, while providing additional support and stability. The engagement of the snap-fit ​​part 501 with the first connecting part 207 or the second connecting part 305 also ensures a secure connection between the end cap 500 and the first wheel hub 201 and the second wheel hub 301.

[0093] In summary, by arranging detachable first movable wheels 200, this application enables the portable device 100 to move flexibly and be stably supported under different road conditions, while reducing the space occupied by the wheels indoors or in vehicles, thus improving the practicality of the product and the user experience.

[0094] This application also provides a portable device 100, including a device body and a wheel assembly as described in any of the preceding embodiments of the portable device, wherein a first movable wheel 200 and a second movable wheel 300 are detachably connected, and the wheel assembly is connected to the device body to enable the device body of the portable device 100 to move.

[0095] The portable device 100 can be a mobile energy storage device or an outdoor mobile device such as an outdoor refrigerator.

[0096] See Figure 2 To optimize the above technical solution, the portable device 100 includes two sets of wheel assemblies; the second movable wheels 300 of the two sets of wheel assemblies are disposed opposite each other on one side of the device body of the portable device. The portable device body includes two oppositely disposed connection holes 601, and the two connection holes 601 are disposed on the side of the portable device 100 body away from the wheel assemblies. The wheel assembly also includes a bracket 600, the two ends of the bracket 600 being engaged or rotatably connected to the two connection holes 601 respectively. The first movable wheel 200 of the wheel assembly is connected to the second movable wheel 300. When the bracket 600 is connected to the connection hole 601, the portable device is placed horizontally.

[0097] Specifically, when the portable device 100 includes two sets of wheel assemblies, the two sets of second moving wheels 300 can be connected by a pivot, or they can be disconnected; this is not limited here.

[0098] Specifically, the support can be a U-shaped design.

[0099] Specifically, the two ends of the bracket 600 are respectively engaged with the two connection holes 601 through structures including but not limited to slots, buckles, etc. The two ends of the bracket 600 are respectively engaged with the two connection holes 601 through structures such as shafts. In addition to engaging and rotating methods, the connection between the bracket 600 and the connection holes 601 of the portable device 100 can also be telescopic or hinged. The specific structure can be adjusted according to the usage requirements, which will not be elaborated here.

[0100] Specifically, after the bracket 600 is connected to the connection hole 601, the distance from the bottom of the bracket 600 to the top of the portable device 100 is equal to the distance from the bottom of the first moving wheel 200 to the top of the portable device 100, so that the portable device 100 remains horizontal when placed.

[0101] Specifically, the connection hole 601 of the portable device 100 is designed to accommodate a plug-in handle 208, and the two ends of the bracket 600 are respectively fastened inside the two plug-in handles 208 to form a stable connection.

[0102] When in use, when the portable device 100 reaches the preset position, the operator will fasten one end of the bracket 600 into the inside of a connection hole 601, and then press and deform the other end to fasten it into the inside of another connection hole 601, thus completing the quick installation of the bracket 600.

[0103] By arranging the bracket 600, the portable device 100 is provided with additional support and stability, ensuring the safety and stability of the portable device 100 when placed; the U-shaped design of the bracket 600 allows it to easily engage with the connection hole 601 of the portable device 100, improving the ease of installation.

[0104] To optimize the above technical solution, the wheel assembly also includes a support frame, which is square in shape and whose top is connected to the bottom of the portable device 100.

[0105] Specifically, the support frame is used to support the portable device 100 and keep it stable when placed. It can be used in conjunction with the bracket 600. The support frame can be a hollow square column design, with one end face connected to the bottom of the portable device 100, which can reduce the total weight of the portable device 100.

[0106] In some embodiments, the support frame and the portable device 100 are fixedly connected to improve the connection stability between the support frame and the portable device 100.

[0107] In other embodiments, the support frame is rotatably connected to the portable device 100. When the support frame is folded up, it can be stored at the bottom of the portable device 100 (a storage space is provided at the bottom of the portable device 100). When the support frame is extended, it can support the portable device 100.

[0108] By arranging a support frame, the portable device 100 is provided with additional support and stability, ensuring the safety and stability of the portable device 100 when placed.

[0109] The specific structure of the wheel assembly of the portable device is as described in the above embodiments. Since the portable device 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described in detail here.

[0110] It should be noted that the wheel assembly and portable device provided by this utility model can be used in the field of portable device technology or other fields. Other fields refer to any field other than the field of portable device technology. The above are merely examples and do not limit the application areas of the wheel assembly and portable device provided by this utility model.

[0111] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0112] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0113] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A wheel assembly for a portable device, characterized in that, Includes the first moving wheel and the second moving wheel; The first movable wheel includes a first hub, a connector and a first tire, and the first hub is provided with at least one first mounting hole; The second movable wheel includes a second hub and a second tire. The second tire is fitted onto the outside of the second hub. The second hub is provided with at least one second mounting hole, and the first mounting hole and the second mounting hole are provided in a one-to-one correspondence. The connector detachably connects the first wheel hub and the second wheel hub through the first mounting hole and the second mounting hole; when the first wheel hub and the second wheel hub are connected, the first tire is in contact with the ground; when the first wheel hub and the second wheel hub are detached, the second tire is in contact with the ground. The first tire is fitted onto the outside of the first rim, and the diameter of the first tire is larger than the diameter of the second tire, and the tread of the first tire is larger than the tread of the second tire.

2. The wheel assembly of the portable device according to claim 1, characterized in that, The connector includes a captive screw, which has a threaded end and a smooth end. The sidewall of the first mounting hole has a threaded structure, and the sidewall of the second mounting hole has an embedded nut. The threaded end mates with the threaded structure and the embedded nut, and the smooth end is connected to a handle.

3. The wheel assembly of the portable device according to claim 2, characterized in that, The first wheel is provided with three first mounting holes, the second wheel hub is provided with three second mounting holes, and the connector includes three captive screws to allow the first wheel hub and the second wheel hub to be detachably connected; The three first mounting holes can be connected to form an equilateral triangle, and the center of the equilateral triangle coincides with the axis of the first hub. The depth of the first mounting holes is set along the axial direction of the first hub. The three second mounting holes can form another equilateral triangle, and the center of the other equilateral triangle coincides with the axis of the second hub. The depth of the second mounting holes is set along the axial direction of the second hub.

4. The wheel assembly of the portable device according to claim 1, characterized in that, The hardness of the first moving wheel is less than that of the second moving wheel.

5. The wheel assembly of the portable device according to claim 1, characterized in that, The first movable wheel is an inflatable wheel, and the first tire includes an inner tube and an outer tire. The inner tube is connected to the first wheel hub, and the outer tire is fitted over the inner tube. The first movable wheel also includes an air inflator, which is inserted into the first wheel hub, with one end of the air inflator protruding from the outer surface of the first wheel hub and the other end of the air inflator communicating with the inner tube; Alternatively, the first movable wheel may be a one-piece molded foam wheel.

6. The wheel assembly of the portable device according to claim 1, characterized in that, The first wheel hub has at least one first insertion part on the side near the second wheel hub, and the second wheel hub has at least one second insertion part on the side near the first wheel hub, and the first insertion part and the second insertion part are connected by insertion.

7. The wheel assembly of the portable device according to claim 6, characterized in that, The first wheel hub has multiple grooves on the side near the second wheel hub, at least one first insertion part is arranged inside the same groove, and the first insertion part protrudes from the bottom of the groove. The second wheel hub has multiple dividing ribs extending along the axial direction of the second wheel hub on the side near the first wheel hub, and the second insertion part is a cavity formed by the dividing ribs.

8. The wheel assembly of the portable device according to claim 1, characterized in that, The wheel assembly also includes an end cap, which is provided with a snap-fit ​​portion. A first connecting portion is provided on the side of the first wheel hub away from the second wheel hub, and a second connecting portion is provided on the side of the second wheel hub close to the first wheel hub. When the first movable wheel and the second movable wheel are assembled, the snap-fit ​​part is connected to the first connecting part so that the end cap is connected to the first movable wheel; When the first movable wheel and the second movable wheel are disassembled, the snap-fit ​​part is connected to the second connecting part so that the end cap is connected to the second movable wheel.

9. A portable device, characterized in that, The device includes a device body and a wheel assembly for a portable device as described in any one of claims 1 to 8, wherein the first movable wheel and the second movable wheel are detachably connected, and the wheel assembly is connected to the device body to enable movement of the device body.

10. The portable device according to claim 9, characterized in that, The portable device includes two sets of wheel assemblies; the second movable wheels of the two sets of wheel assemblies are disposed opposite to each other on one side of the device body of the portable device, the device body of the portable device includes two oppositely disposed connection holes, and the two connection holes are disposed on the side of the portable device away from the wheel assemblies, the portable device also includes a bracket, the two ends of the bracket being respectively engaged or rotatably connected to the two connection holes; When the first movable wheel of the wheel assembly is connected to the second movable wheel, and the bracket is connected to the connection hole, the portable device is placed horizontally.

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