Trolley with replaceable large wheel assembly

Abstract

The utility model discloses a cart with a replaceable large wheel assembly, which comprises a cart body, a first wheel assembly, a second wheel assembly and a dismounting structure, the dismounting structure is arranged on the cart body, the first wheel assembly and the second wheel assembly, the wheel diameter of the first wheel assembly is larger than that of the second wheel assembly, and the dismounting structure is arranged on the cart body. The first wheel assembly can be detachably installed on the vehicle body through the disassembly and assembly structure, the second wheel assembly can be detachably installed on the vehicle body through the disassembly and assembly structure, and when one of the first wheel assembly and the second wheel assembly is installed on the vehicle body, the other is not installed on the vehicle body. The first wheel assembly and the second wheel assembly can be replaced on the cart body, the first wheel assembly is large in wheel diameter, good in passing performance and more stable, the second wheel assembly is small in wheel diameter and more flexible in walking, a user can replace the cart according to needs, the cart is suitable for more scenes, different carts do not need to be purchased, and the use cost is low.

Description

Technical Field

[0001] This utility model relates to the technical field of children's vehicles, and in particular to a stroller with replaceable large wheel components. Background Technology

[0002] In the existing technology, the walking mechanism of strollers generally adopts a fixed wheel set design. This non-replaceable wheel set configuration leads to significant limitations in the application of strollers in many scenarios. For example, strollers with small wheel diameters are more flexible and easier to turn, but have poor passability, poor shock absorption, and are prone to tipping over. Strollers with large wheel diameters can improve stability and passability, but are not flexible enough. Therefore, users need to purchase different types of strollers to meet their needs, resulting in high usage costs. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a trolley with replaceable large wheel components, which can solve the problem of limited application scenarios for trolleys.

[0004] A trolley with replaceable large wheel assemblies according to a first aspect embodiment of the present invention includes: a trolley body, a first wheel assembly, a second wheel assembly, and a disassembly / assembly structure. The disassembly / assembly structure is disposed on the trolley body, the first wheel assembly, and the second wheel assembly. The wheel diameter of the first wheel assembly is larger than that of the second wheel assembly. The first wheel assembly can be detachably installed on the trolley body via the disassembly / assembly structure. The second wheel assembly can be detachably installed on the trolley body via the disassembly / assembly structure. When one of the first wheel assembly and the second wheel assembly is installed on the trolley body, the other is not installed on the trolley body.

[0005] According to an embodiment of the present invention, a trolley with replaceable large wheel assemblies has at least the following advantages: the first wheel assembly and the second wheel assembly can be replaced on the trolley body. The first wheel assembly has a larger wheel diameter, which provides better passability and greater stability. The second wheel assembly has a smaller wheel diameter, which makes walking more flexible. Users can replace the first wheel assembly as needed, making it suitable for more scenarios. Furthermore, there is no need to purchase different trolleys, resulting in low usage costs.

[0006] According to some embodiments of the present invention, a guide wheel assembly is provided at the bottom front side of the vehicle body, and the first wheel assembly or the second wheel assembly is installed at the bottom rear side of the vehicle body.

[0007] According to some embodiments of the present invention, when the first wheel assembly is installed, the distance from the bottom rear side of the vehicle body to the ground is D1, and when the second wheel assembly is installed, the distance from the bottom rear side of the vehicle body to the ground is D2, where D1 = D2.

[0008] According to some embodiments of the present invention, the disassembly and assembly structure includes a connecting column, a mounting base, and a limiting structure. The connecting column is disposed on the first wheel assembly and the second wheel assembly. The mounting base is provided with a mounting hole. The limiting structure is disposed on the mounting base. The limiting structure has an unlocked state and a locked state. In the unlocked state, the connecting column can be inserted into or disengaged from the mounting hole. In the locked state, the connecting column can be restricted from disengaging from the mounting hole.

[0009] According to some embodiments of this utility model, the side wall of the connecting column is provided with an annular groove, the limiting structure includes an elastic element and a locking piece, the locking piece is provided with a locking hole, the locking piece can be slidably connected to the mounting seat along the radial direction of the mounting hole, the elastic element is disposed between the mounting seat and / or the vehicle body and the locking piece, in the locked state, the elastic element can drive the locking piece to slide to the locking hole and engage in the annular groove, in the unlocked state, the locking piece can slide to the locking hole and disengage from the annular groove.

[0010] According to some embodiments of the present invention, the top of the connecting column is provided with a guide portion for inserting into the mounting hole.

[0011] According to some embodiments of the present invention, the vehicle body is provided with an operating hole communicating with the side of the locking piece away from the elastic member.

[0012] According to some embodiments of the present invention, the first wheel assembly includes a wheel bracket and two first wheels, the first wheels being rotatably mounted on both ends of the wheel bracket, and the wheel bracket being provided with the disassembly and assembly structure.

[0013] According to some embodiments of the present invention, a shock absorber for shock absorption is also provided between the wheel bracket and the vehicle body.

[0014] According to some embodiments of the present invention, the second wheel assembly includes a support and a second wheel, the support being rotatably mounted on the vehicle body in a horizontal direction, and the second wheel being rotatably mounted on the support.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of the installation of the second wheel assembly in some embodiments of the present invention;

[0018] Figure 2 This is a schematic diagram of the installation of the first wheel assembly in some embodiments of the present invention;

[0019] Figure 3 Side view of the second wheel assembly being installed;

[0020] Figure 4 A side view of the first wheel assembly being installed;

[0021] Figure 5 This is a schematic diagram of the disassembly and assembly structure;

[0022] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle.

[0023] Figure label:

[0024] Vehicle body 100, operating port 110;

[0025] First wheel assembly 200, wheel bracket 210, first wheel 220, shock absorber 230;

[0026] Second wheel assembly 300, support 310, second wheel 320;

[0027] The components include: disassembly and assembly structure 400, connecting column 410, annular groove 411, guide part 412, mounting base 420, mounting hole 421, limiting structure 430, elastic element 431, locking piece 432, and locking hole 4321.

[0028] Guide wheel assembly 500. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Reference Figures 1 to 6 A trolley with replaceable large wheel assemblies according to a first aspect embodiment of the present invention includes a trolley body 100, a first wheel assembly 200, a second wheel assembly 300, and a disassembly / assembly structure 400. The disassembly / assembly structure 400 is disposed on the trolley body 100, the first wheel assembly 200, and the second wheel assembly 300. The wheel diameter of the first wheel assembly 200 is larger than that of the second wheel assembly 300. The first wheel assembly 200 can be detachably installed on the trolley body 100 through the disassembly / assembly structure 400. The second wheel assembly 300 can be detachably installed on the trolley body 100 through the disassembly / assembly structure 400. When one of the first wheel assembly 200 and the second wheel assembly 300 is installed on the trolley body 100, the other is not installed on the trolley body 100. The first wheel assembly 200 and the second wheel assembly 300 can be replaced on the vehicle body 100. The first wheel assembly 200 has a larger wheel diameter, which provides better passability and greater stability. The second wheel assembly 300 has a smaller wheel diameter, which makes walking more flexible. Users can replace them according to their needs, making it suitable for more scenarios. There is no need to buy different strollers, resulting in low operating costs.

[0033] Specifically, the vehicle body 100 can be configured as a cart frame. The bottom of the vehicle body 100 has a disassembly structure 400, and the first wheel assembly 200 and the second wheel assembly 300 also have corresponding disassembly structures 400. Users can install the first wheel assembly 200 or the second wheel assembly 300 onto the vehicle body 100, thereby enabling the replacement of wheel assemblies with different wheel diameters. The first wheel assembly 200 can be configured as a large wheel, and the second wheel assembly 300 can be configured as a small wheel. The specific dimensions of the wheels are not described in detail here. Larger wheels have better passability and shock absorption performance. Therefore, when it is necessary to walk on uneven roads, the first wheel assembly 200 can be installed onto the vehicle body 100 through the disassembly structure 400. The smaller wheels of the second wheel assembly 300 are lighter and more flexible in steering. In daily use, the second wheel assembly 300 can be installed onto the vehicle body 100 through the disassembly structure 400. It should be noted that the number and placement of the first wheel assembly 200 and the second wheel assembly 300 are not limited here, as long as they can move.

[0034] Reference Figures 1 to 4 In some embodiments of this utility model, a guide wheel assembly 500 is provided at the bottom front side of the vehicle body 100, and a first wheel assembly 200 or a second wheel assembly 300 is installed at the bottom rear side of the vehicle body 100. Specifically, the wheels of the vehicle body 100 can be arranged in a front-to-back configuration, and the guide wheel assembly 500 can be provided at the front side. The guide wheel assembly 500 can rotate in the horizontal direction to facilitate steering of the vehicle. The rear side of the vehicle body 100 is mainly used for carrying and passing through. Therefore, the guide wheel assembly 500 at the front side does not need to be replaced, thereby reducing the operation steps. Only the rear side of the vehicle body 100 needs to be replaced, which makes disassembly and assembly more convenient. It is conceivable that the guide wheel assembly 500 at the front side or the first wheel assembly 200 and the second wheel assembly 300 at the rear side can be one or more wheels.

[0035] Reference Figures 3 to 4 In some embodiments of this utility model, when the first wheel assembly 200 is installed, the distance from the bottom rear side of the vehicle body 100 to the ground is D1; ​​when the second wheel assembly 300 is installed, the distance from the bottom rear side of the vehicle body 100 to the ground is D2, where D1 = D2. Specifically, since the wheel diameters of the first wheel assembly 200 and the second wheel assembly 300 are different, the size of the wheel bracket used to mount the wheel on the vehicle body 100 can be adjusted. The wheel bracket of the first wheel assembly 200 can be set lower, and the wheel bracket of the second wheel assembly 300 can be set higher, so that D1 and D2 are the same. Therefore, after replacing the first wheel assembly 200 and the second wheel assembly 300, the vehicle body 100 will not tilt and can still maintain a roughly horizontal state, without affecting the comfort of riding.

[0036] Reference Figures 5 to 6In some embodiments of this utility model, the disassembly and assembly structure 400 includes a connecting post 410, a mounting base 420, and a limiting structure 430. The connecting post 410 is disposed on the first wheel assembly 200 and the second wheel assembly 300. The mounting base 420 is provided with a mounting hole 421. The limiting structure 430 is disposed on the mounting base 420. The limiting structure 430 has an unlocked state and a locked state. In the unlocked state, the connecting post 410 can be inserted into or disengaged from the mounting hole 421. In the locked state, the connecting post 410 can be restricted from disengaging from the mounting hole 421. Specifically, the bottom of the vehicle body 100 can be provided with a mounting seat 420 at a corresponding position, and the top of the first wheel assembly 200 and the second wheel assembly 300 can both be provided with a connecting post 410. When disassembling, the limiting structure 430 can be switched to the unlocked state, so that the connecting post 410 can be disengaged from the mounting hole 421, and then the wheel assembly can be replaced. The connecting post 410 can be inserted into the mounting hole 421, and then the limiting structure 430 is switched to the locked state. At this time, the connecting post 410 is locked behind the limiting structure 430 and cannot be disengaged from the mounting hole 421, thereby realizing the disassembly and replacement of the first wheel assembly 200 and the second wheel assembly 300.

[0037] Reference Figures 5 to 6 In some embodiments of this utility model, the side wall of the connecting column 410 is provided with an annular groove 411, and the limiting structure 430 includes an elastic element 431 and a locking piece 432. The locking piece 432 is provided with a locking hole 4321. The locking piece 432 can be slidably connected to the mounting base 420 along the radial direction of the mounting hole 421. The elastic element 431 can be provided between the vehicle body 100 and / or the mounting base 420 and the locking piece 432. In the locked state, the elastic element 431 can drive the locking piece 432 to slide to the locking hole 4321 and engage with the annular groove 411. In the unlocked state, the locking piece 432 can slide to the locking hole 4321 and disengage from the annular groove 411. Specifically, the elastic element 431 can be a spring. Under the action of the elastic force, the locking piece 432 can be kept locked in the annular groove 411, so that the connecting post 410 cannot be pulled out of the mounting hole 421 along its axis. When disassembly is required, the locking piece 432 can be driven to move towards the elastic element 431. At this time, the elastic element 431 is compressed, and the locking hole 4321 is disengaged from the annular groove 411, so that the mounting hole 421 and the locking hole 4321 can be roughly aligned. At this time, the connecting post 410 can be pulled out of the mounting hole 421, which is more convenient to operate and makes it easier for users to replace the wheel assembly.

[0038] Reference Figures 5 to 6In some embodiments of this utility model, the top of the connecting post 410 is provided with a guide portion 412 for inserting into the mounting hole 421. Specifically, the guide portion 412 can be a round-headed structure or a conical structure, so that when the connecting post 410 is inserted into the mounting hole 421, it can be guided by the above-mentioned guide portion 412 structure, and can be more smoothly aligned with and inserted into the mounting hole 421. Furthermore, when the connecting post 410 is inserted into the mounting hole 421, the guide portion 412 can abut against and cooperate with the locking piece 432, and push the locking piece 432 to unlock, allowing the connecting post 410 to be inserted into the mounting hole 421. When inserted into the mounting hole 421, under the action of the elastic member 431, the locking hole 4321 can automatically engage with the annular groove 411 to achieve locking. The operation is more convenient.

[0039] Reference Figures 5 to 6 In some embodiments of this utility model, the vehicle body 100 is provided with an operating hole 110 communicating with the side of the locking piece 432 away from the elastic member 431. Specifically, the locking piece 432 can extend out of the operating hole 110, allowing the user to directly push the locking piece 432 to unlock. It is conceivable that the locking piece 432 may not extend out of the operating hole 110, allowing the user to insert a screwdriver or other tool into the operating hole 110 and push the locking piece 432 to unlock, which can also prevent accidental unlocking that could cause the wheel to fall off.

[0040] Reference Figure 2 In some embodiments of this utility model, the first wheel assembly 200 includes a wheel bracket 210 and two first wheels 220. The first wheels 220 are rotatably mounted on both ends of the wheel bracket 210, and the wheel bracket 210 is provided with a disassembly and assembly structure 400. Specifically, the two first wheels 220 are connected through the wheel bracket 210, which has a strong load-bearing capacity and good stability during driving. Moreover, during installation, it is not necessary to install the two wheels separately to the vehicle body 100, but only to disassemble and assemble the wheel bracket 210 from the vehicle body 100, which is convenient for operation.

[0041] Reference Figure 2 In some embodiments of this utility model, a shock absorber 230 for shock absorption is also provided between the wheel bracket 210 and the vehicle body 100. Specifically, by providing the shock absorber 230, the damping performance during driving can be improved. The specific structure of the shock absorber 230 is conventional and will not be described in detail here.

[0042] Reference Figure 1 In some embodiments of this utility model, the second wheel assembly 300 includes a support 310 and a second wheel 320. The support 310 is rotatably mounted on the vehicle body 100 in a horizontal direction, and the second wheel 320 is rotatably mounted on the support 310. Specifically, the vehicle body 100 can switch between forward and backward pushing directions. When the vehicle body 100 changes direction (with... Figure 1When the direction of propulsion is opposite, the support 310 can rotate around the horizontal direction. At this time, the second wheel assembly 300 can act as a guide wheel to facilitate switching the forward and backward propulsion directions, making it convenient for the user. The linkage structure between the support 310 and the vehicle body 100 for reversing direction will not be described in detail here.

[0043] It is understandable that both the first wheel assembly 200 and the second wheel assembly 300 may be equipped with a braking structure to lock the wheels and prevent the vehicle from rolling away.

[0044] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A trolley with replaceable large wheel assembly, characterized in that, include: Vehicle body (100); First wheel assembly (200); Second wheel assembly (300); A disassembly and assembly structure (400) is provided on the vehicle body (100), the first wheel assembly (200) and the second wheel assembly (300); Wherein, the diameter of the first wheel assembly (200) is larger than that of the second wheel assembly (300), the first wheel assembly (200) can be detachably installed on the vehicle body (100) through the disassembly structure (400), the second wheel assembly (300) can be detachably installed on the vehicle body (100) through the disassembly structure (400), and when one of the first wheel assembly (200) and the second wheel assembly (300) is installed on the vehicle body (100), the other is not installed on the vehicle body (100).

2. The trolley with replaceable large wheel assembly according to claim 1, characterized in that, The vehicle body (100) has a guide wheel assembly (500) at the bottom front side, and the first wheel assembly (200) or the second wheel assembly (300) is installed at the bottom rear side of the vehicle body (100).

3. A trolley with replaceable large wheel assembly according to claim 2, characterized in that, When the first wheel assembly (200) is installed, the distance from the bottom rear side of the vehicle body (100) to the ground is D1. When the second wheel assembly (300) is installed, the distance from the bottom rear side of the vehicle body (100) to the ground is D2, where D1 = D2.

4. A trolley with replaceable large wheel assembly according to claim 1, characterized in that, The disassembly and assembly structure (400) includes a connecting post (410), a mounting base (420), and a limiting structure (430). The connecting post (410) is disposed on the first wheel assembly (200) and the second wheel assembly (300). The mounting base (420) is provided with a mounting hole (421). The limiting structure (430) is disposed on the mounting base (420). The limiting structure (430) has an unlocked state and a locked state. In the unlocked state, the connecting post (410) can be inserted into or disengaged from the mounting hole (421). In the locked state, the connecting post (410) can be restricted from disengaging from the mounting hole (421).

5. A trolley with replaceable large wheel assembly according to claim 4, characterized in that, The connecting column (410) has an annular groove (411) on its side wall. The limiting structure (430) includes an elastic element (431) and a locking piece (432). The locking piece (432) has a locking hole (4321). The locking piece (432) can slide radially to the mounting base (420) along the mounting hole (421). The elastic element (431) is located between the mounting base (420) and / or the vehicle body (100) and the locking piece (432). In the locked state, the elastic element (431) can drive the locking piece (432) to slide to the locking hole (4321) and engage with the annular groove (411). In the unlocked state, the locking piece (432) can slide to the locking hole (4321) and disengage from the annular groove (411).

6. A trolley with replaceable large wheel assembly according to claim 4, characterized in that, The top of the connecting post (410) is provided with a guide (412) for inserting into the mounting hole (421).

7. A trolley with replaceable large wheel assembly according to claim 5, characterized in that, The vehicle body (100) is provided with an operating hole (110) that communicates with the side of the locking piece (432) away from the elastic member (431).

8. A trolley with replaceable large wheel assembly according to claim 1, characterized in that, The first wheel assembly (200) includes a wheel bracket (210) and two first wheels (220), the first wheels (220) being rotatably mounted on both ends of the wheel bracket (210), and the wheel bracket (210) being provided with the disassembly and assembly structure (400).

9. A trolley with replaceable large wheel assembly according to claim 8, characterized in that, A shock absorber (230) for shock absorption is also provided between the wheel bracket (210) and the vehicle body (100).

10. A trolley with replaceable large wheel assembly according to claim 1, characterized in that, The second wheel assembly (300) includes a support (310) and a second wheel (320). The support (310) is rotatably mounted on the vehicle body (100) in a horizontal direction, and the second wheel (320) is rotatably mounted on the support (310).

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