Multi-form child three-wheel cart convenient to switch
The detachable rear wheel assembly design solves the problem of complex mode switching in traditional children's tricycles, enabling quick disassembly and installation, improving the adaptability and stability of children's tricycles, reducing maintenance costs, and facilitating storage and transportation.
Patent Information
- Application Number
- CN202520461641.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-03-17
AI Technical Summary
Traditional children's tricycles have complicated mode switching operations in the rear wheel assembly design, requiring multiple joint rotations, which results in significant swaying and poor stability of the entire vehicle.
The vehicle employs detachable first and second rear wheel assemblies. Through the design of the connector and elastic plunger, it achieves quick switching of vehicle modes. The design of the connector and unlock button enables quick disassembly and installation, simplifying the disassembly and assembly process.
It improves the adaptability and flexibility of the stroller, reduces maintenance costs, facilitates storage and transportation, has strong overall stability, reduces shaking, and simplifies mode switching.
Smart Images
Figure CN223750927U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to children's pushchair technical field especially point to a kind of multi-form children's tricycle pushchair of easy switching. BACKGROUND
[0002] Children's tricycle pushchair is the toy that many children love, also is children's walking tool, children can be well exercised knee joint muscle strength when riding pushchair, improve movement ability, promote children's physical development, conducive to children's growth.
[0003] The rear wheel assembly of traditional children's tricycle needs to rotate the rear foot joint to drive the distance change of two rear wheels when switching the mode between scooter and tricycle, and the two rear wheels also need to rotate to keep parallel, which is complicated to operate, and there are many rotating positions, large gap, and the whole vehicle shakes obviously. UTILITY MODEL CONTENT
[0004] Therefore, the utility model provides a kind of multi-form children's tricycle pushchair of easy switching, which adds children's car sliding function to rear wheel assembly and is convenient to store and transport, and mode switching is simple, and the whole vehicle does not need to rotate joint, the whole vehicle shakes little, and is stable.
[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:
[0006] A kind of multi-form children's tricycle pushchair of easy switching, including frame, first rear wheel assembly and second rear wheel assembly, the first rear wheel assembly includes first rear wheel frame and two first rear tires, two first rear tires are respectively rotationally arranged at the two ends of the first rear wheel frame, and the middle part of the first rear wheel frame is detachably connected with the rear end of the frame;The second rear wheel assembly includes second rear wheel frame and second rear tire, the second rear tire is rotationally arranged on the second rear wheel frame, and the second rear wheel frame is detachably installed on the rear end of the frame or the first rear wheel frame.
[0007] As a preferred solution, the rear end of the frame is provided with a rear fork shaft, the rear fork shaft includes two symmetrically arranged first insertion pipes, the first insertion pipes extend along the rear of the vehicle body, the first rear wheel frame is provided with two second insertion pipes corresponding to the first insertion pipes, the second rear wheel frame is provided with two third insertion pipes corresponding to the first insertion pipes, and the first rear wheel frame is provided with an insertion column corresponding to the third insertion pipe.
[0008] As a preferred solution, the first plug-in pipe is provided with an avoiding through hole on the pipe wall, the first plug-in pipe is provided with an elastic plunger, the elastic plunger comprises a first limiting column and a first elastic element, the first limiting column and the first elastic element are integrally formed, the first limiting column is arranged in the avoiding through hole, and the first elastic element enables the first limiting column to have a tendency to move radially outward of the first plug-in pipe.
[0009] As a preferred solution, the plug-in column has an outer diameter not greater than an inner diameter of the third plug-in pipe, the plug-in column is provided with a second elastic element on the side wall, and the second elastic element is provided with a second limiting column corresponding to the limiting through hole.
[0010] As a preferred solution, the second plug-in pipe and the third plug-in pipe are each provided with an unlocking button, the unlocking button comprises a movable end and an unlocking end, the movable end is connected to the second plug-in pipe and the third plug-in pipe through a fastener, the unlocking end is provided with a pushing column, the pushing column is arranged outside the avoiding through hole, and the pushing column has a diameter smaller than that of the avoiding through hole.
[0011] As a preferred solution, the first rear wheel frame is provided with two fourth plug-in pipes, the two fourth plug-in pipes are arranged on the other side of the first rear wheel frame relative to the second plug-in pipe, and are parallel to the second plug-in pipe, and the fourth plug-in pipe has an outer diameter not greater than an inner diameter of the third plug-in pipe.
[0012] As a preferred solution, the second plug-in pipe and the third plug-in pipe are provided with a third elastic element, an end of the first plug-in pipe is provided with a stop block corresponding to the third elastic element, and the third elastic element and the stop block cooperate to enable the first plug-in pipe to have a tendency to move away from the second plug-in pipe or the third plug-in pipe.
[0013] As a preferred solution, the third elastic element is a spring, and the second plug-in pipe and the third plug-in pipe are provided with clamping grooves with an inner diameter same as an outer diameter of the spring.
[0014] As a preferred solution, the second plug-in pipe and the third plug-in pipe are provided with a guide groove at the opening, and the guide groove gradually decreases in depth from an inlet end to a fixed end.
[0015] The utility model discloses an improved stroller, which has obvious advantages and beneficial effects compared with the prior art.
[0016] To make the structure features and effects of the utility model clearer, the utility model will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 is the assembly structure schematic diagram of the embodiment one of the utility model.
[0018] Figure 2 is the exploded structure schematic diagram of the embodiment of the utility model.
[0019] Figure 3 is the structure schematic diagram of the first rear wheel assembly of the embodiment of the utility model.
[0020] Figure 4 is the structure schematic diagram of the second rear wheel assembly of the embodiment of the utility model.
[0021] Figure 5 is the exploded sectional view of the first rear wheel assembly and rear fork axle of the embodiment of the utility model.
[0022] Figure 6 is the structure schematic diagram of the unlocking button of the embodiment of the utility model.
[0023] Figure 7 is the assembly structure schematic diagram of the embodiment two of the utility model.
[0024] Figure 8 is the assembly structure schematic diagram of the embodiment three of the utility model.
[0025] BRIEF DESCRIPTION OF DRAWINGS
[0026] 100, frame;110, rear fork axle;111, first plug-in pipe;112, avoidance through hole;120, elastic plunger;121, first limiting column;122, first elastic piece;
[0027] 200, first rear wheel assembly; 210, first rear wheel frame; 211, second insertion pipe; 212, fourth insertion pipe; 220, first rear tire; 230, insertion column; 231, second elastic member; 232, second limiting column;
[0028] 300, second rear wheel assembly; 310, second rear wheel frame; 311, third insertion pipe; 320, second rear tire;
[0029] 400, limiting through hole; 410, third elastic member; 420, stop block; 430, guide groove;
[0030] 500, unlocking button; 510, movable end; 520, unlocking end; 521, pushing column. DETAILED DESCRIPTION
[0031] In order to make the purpose of the utility model, the technical scheme and the advantage are more clear and obvious, the following combines the drawing and the implementation example, and the utility model is further explained in detail. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.
[0032] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.
[0033] Please refer to Figures 1 to 8 The utility model embodiment provides a kind of multi-form children's tricycle of easy switching, including frame 100, first rear wheel assembly 200 and second rear wheel assembly 300, first rear wheel assembly 200 includes first rear wheel frame 210 and two first rear tires 220, two first rear tires 220 are respectively rotationally arranged in the two ends of first rear wheel frame 210, and the middle part of first rear wheel frame 210 is detachably connected with the rear end of frame 100;Second rear wheel assembly 300 includes second rear wheel frame 310 and second rear tire 320, and second rear tire 320 is rotationally arranged on second rear wheel frame 310, and second rear wheel frame 310 is detachably installed on the rear end of frame 100 or first rear wheel frame 210.
[0034] Preferably, the rear end of the frame 100 is provided with a rear axle 110, the rear axle 110 comprises two symmetrical first insertion pipes 111, the two first insertion pipes 111 are arranged symmetrically with the central axis of the stroller, the first insertion pipes 111 extend along the rear of the vehicle body, the first rear wheel frame 210 is provided with two second insertion pipes 211 corresponding to the first insertion pipes 111, the second rear wheel frame 310 is provided with two third insertion pipes 311 corresponding to the first insertion pipes 111, the insertion column 230 is arranged between the two second insertion pipes 211, the second rear tire 320 is arranged between the two third insertion pipes 311, the first rear wheel frame 210 is provided with an insertion column 230 corresponding to the third insertion pipe 311, the insertion column 230 is arranged for storing and installing the unused second rear wheel assembly 300 on the first rear wheel assembly 200, and the diameter of the second rear tire 320 is greater than that of the first rear tire 220.
[0035] Preferably, the pipe wall of the first insertion pipe 111 is provided with a avoiding through hole 112, the avoiding through hole 112 penetrates the pipe wall of the first insertion pipe 111, the first insertion pipe 111 is provided with an elastic plunger 120, the elastic plunger 120 comprises a first limiting column 121 and a first elastic element 122, the first limiting column 121 and the first elastic element 122 are integrally formed, the first limiting column 121 is arranged in the avoiding through hole 112, the first elastic element 122 makes the first limiting column 121 have a tendency to move radially outward along the first insertion pipe 111, the inner diameters of the second insertion pipe 211 and the third insertion pipe 311 are not less than the outer diameter of the first insertion pipe 111, and the pipe walls of the second insertion pipe 211 and the third insertion pipe 311 are both provided with a limiting through hole 400 corresponding to the avoiding through hole 112, the limiting through hole 400 penetrates the pipe walls of the second insertion pipe 211 and the third insertion pipe 311. During insertion assembly, the elastic plunger 120 is clamped into the limiting through hole 400, thereby fixing the first rear wheel assembly 200 or the second rear wheel assembly 300 on the rear axle 110, realizing quick installation.
[0036] Preferably, the outer diameter of the insertion column 230 is not greater than the inner diameter of the third insertion pipe 311, the side wall of the insertion column 230 is provided with a second elastic element 231, and the outer side of the second elastic element 231 is provided with a second limiting column 232 corresponding to the limiting through hole 400. The second elastic element 231 is arranged on the side edge of the insertion column 230, and the second limiting column 232 on the second elastic element 231 is buckled with the limiting through hole 400, so that the third insertion pipe 311 is not easy to fall off after being sleeved on the insertion column 230, thereby the second rear wheel assembly 300 can be fixed on the first rear wheel assembly 200, at this time, the second rear wheel assembly 300 is carried, and the second rear wheel assembly 300 can be replaced at any time.
[0037] Preferably, the second plug pipe 211 and the third plug pipe 311 are provided with an unlocking button 500, the unlocking button 500 comprises a movable end 510 and an unlocking end 520, the movable end 510 is connected to the second plug pipe 211 and the third plug pipe 311 by a fastener, the unlocking end 520 is provided with a push column 521, the push column 521 is arranged outside the avoiding through hole 112, and the diameter of the push column 521 is smaller than the diameter of the avoiding through hole 112. By pressing the unlocking end 520, the push column 521 is extended into the limiting through hole 400, and the first limiting column 121 is pushed out of the limiting through hole 400, so that the first rear wheel assembly 200 or the second rear wheel assembly 300 can be unlocked from the rear fork shaft 110. The unlocking button 500 is convenient for pushing the first limiting column 121 out of the limiting through hole 400, so as to facilitate the disassembly of the first rear wheel assembly 200 and the second rear wheel assembly 300.
[0038] Preferably, the first rear wheel frame 210 is provided with two fourth plug pipes 212, the two fourth plug pipes 212 are arranged on the other side of the first rear wheel frame 210 opposite to the second plug pipe 211, and are parallel to the second plug pipe 211, the outer diameter of the fourth plug pipe 212 is not greater than the inner diameter of the third plug pipe 311, so that the second rear wheel assembly 300 can be directly installed behind the first rear wheel assembly 200 without disassembling the first rear wheel assembly 200, thereby forming a balance car. Similarly, the fourth plug pipe 212 is also provided with an avoiding through hole 112, and the fourth plug pipe 212 is provided with an elastic plunger 120.
[0039] Preferably, the second plug pipe 211 and the third plug pipe 311 are provided with a third elastic member 410, and the end of the first plug pipe 111 is provided with a stop block 420 corresponding to the third elastic member 410, the third elastic member 410 and the stop block 420 cooperate to make the first plug pipe 111 have a tendency to move away from the second plug pipe 211 or the third plug pipe 311. Similarly, the end of the fourth plug pipe 212 is also provided with a stop block 420; when the unlocking buttons 500 on both sides are pressed, the first limiting column 121 is pushed out of the limiting through hole 400, and the second plug pipe 211 or the third plug pipe 311 is separated from the first plug pipe 111 under the action of the third elastic member 410 and the stop block 420, thereby realizing quick disassembly.
[0040] Preferably, the third elastic member 410 is a spring, the second plug pipe 211 and the third plug pipe 311 are provided with clamping grooves 411, the inner diameter of the clamping grooves 411 is the same as the outer diameter of the spring, and the spring is fixed in the second plug pipe 211 and the third plug pipe 311 by interference fit with the clamping grooves 411.
[0041] Preferably, the openings of the second insertion tube 211 and the third insertion tube 311 are provided with guide grooves 430, the depth of which gradually decreases from the inlet end to the fixed end. The guide grooves 430 are provided to guide the entry angle and direction of the second insertion tube 211 and the third insertion tube 311, so that the first limiting post 121 and the second limiting post 232 can be smoothly engaged into the corresponding limiting through hole 400.
[0042] The installation and disassembly process of the rear wheel assembly of this utility model:
[0043] During installation, the second insertion tube 211 or the third insertion tube 311 is inserted into the first insertion tube 111. The first limiting post 121 retracts under the guidance of the guide groove 430. When the second insertion tube 211 or the third insertion tube 311 moves to the position where the clearance through hole 112 is opposite to the limiting through hole 400, the first limiting post 121 moves outward and snaps into the limiting through hole 400, thereby completing the locking.
[0044] During disassembly, press the unlocking buttons 500 on both sides to push the first limiting post 121 out of the limiting through hole 400 to unlock it. Through the cooperation of the third elastic element 410 and the stop block 420, the second insertion tube 211 or the third insertion tube 311 is ejected and separated from the first insertion tube 111 under the force of the third elastic element 410, thereby achieving quick disassembly.
[0045] This utility model has three installation and usage methods:
[0046] Example 1, as Figure 1 As shown, the second connector 211 of the first rear wheel assembly 200 is connected to the rear fork axle 110, and the third connector 311 of the second rear wheel assembly 300 is inserted into the connector 230 of the first rear wheel assembly 200, thereby completing the assembly of the children's tricycle. At this time, the second rear wheel assembly 300 is carried for easy replacement at any time.
[0047] Example 2, as Figure 7 As shown, the second rear wheel assembly 300 in the first embodiment is removed from the plug post 230, and the third plug tube 311 on the second rear wheel frame 310 is plugged into the fourth plug tube 212 of the first rear wheel assembly 200, thereby transforming it into a balance vehicle. At this time, the two first rear tires 220 are equivalent to auxiliary anti-fall wheels, which can further improve the anti-fall effect in this state.
[0048] Example 3, as Figure 8 As shown, the first rear wheel assembly 200 is removed from the rear fork axle 110, and the third connector 311 of the second rear wheel assembly 300 is then connected to the rear fork axle 110, thus transforming it into a two-wheeled self-balancing vehicle.
[0049] From the above technical scheme can know, the child tricycle of the present application, on the first rear wheel assembly and on the second rear wheel assembly are provided with the plug-in pipe corresponding to the rear fork shaft connection, so that the first rear wheel assembly or the second rear wheel assembly can be quickly disassembled on the rear end of the frame, the quick installation is realized through the plug-in buckle mode, and the quick disassembly is realized through the cooperation of the unlocking key, the third elastic member and the stop block, the sliding function of the child car is increased by changing the form, and the storage and transportation are convenient, the mode switching is simple, meanwhile, the whole vehicle does not need to rotate, has the effect of small shaking, strong stability, and has multiple assembly forms, meets the riding needs of children of different age groups.
[0050] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement within the principles of the present application shall be included in the protection scope of the present application.
Claims
1. A multi-configuration child's three-wheeled stroller that facilitates switching, characterized by: The utility model relates to a bicycle frame structure, which comprises a frame (100), a first rear wheel assembly (200) and a second rear wheel assembly (300), The first rear wheel assembly (200) comprises a first rear wheel frame (210) and two first rear tires (220), which are respectively rotatably arranged at two ends of the first rear wheel frame (210), and the middle part of the first rear wheel frame (210) is detachably connected with the rear end of the frame (100). The second rear wheel assembly (300) comprises a second rear wheel frame (310) and a second rear tire (320), which is rotatably arranged on the second rear wheel frame (310), and the second rear wheel frame (310) is detachably mounted on the rear end of the frame (100) or the first rear wheel frame (210).
2. The multi-configurable child tricycle of claim 1, wherein: The rear end of the frame (100) is provided with a rear fork shaft (110), which comprises two symmetrically arranged first plug-in pipes (111) extending along the rear of the vehicle body, the first rear wheel frame (210) is provided with two second plug-in pipes (211) corresponding to the first plug-in pipes (111), the second rear wheel frame (310) is provided with two third plug-in pipes (311) corresponding to the first plug-in pipes (111), and the first rear wheel frame (210) is provided with a plug-in column (230) corresponding to the third plug-in pipes (311).
3. The multi-configurable child tricycle of claim 2, wherein: The pipe wall of the first plug-in pipe (111) is provided with an avoiding through hole (112), the first plug-in pipe (111) is provided with an elastic plunger (120) inside, the elastic plunger (120) comprises a first limiting column (121) and a first elastic member (122), the first limiting column (121) and the first elastic member (122) are integrally formed, the first limiting column (121) is arranged in the avoiding through hole (112), the first elastic member (122) makes the first limiting column (121) have a tendency to move radially outward along the first plug-in pipe (111), the inner diameters of the second plug-in pipe (211) and the third plug-in pipe (311) are not less than the outer diameter of the first plug-in pipe (111), and the pipe walls of the second plug-in pipe (211) and the third plug-in pipe (311) are both provided with limiting through holes (400) corresponding to the avoiding through hole (112).
4. The multi-configurable child tricycle of claim 3, wherein: The outer diameter of the plug-in column (230) is not greater than the inner diameter of the third plug-in pipe (311), the side wall of the plug-in column (230) is provided with a second elastic member (231), and the outer side of the second elastic member (231) is provided with a second limiting column (232) corresponding to the limiting through hole (400).
5. The multi-configurable child tricycle of claim 3, wherein: The second plug pipe (211) and the third plug pipe (311) are provided with an unlocking button (500), the unlocking button (500) comprises a movable end (510) and an unlocking end (520), the movable end (510) is connected on the second plug pipe (211) and the third plug pipe (311) by a fastener, the unlocking end (520) is provided with a push column (521), the push column (521) is arranged outside the avoiding through hole (112), and the diameter of the push column (521) is smaller than the diameter of the avoiding through hole (112).
6. The multi-configurable child tricycle of claim 3, wherein: The first rear wheel frame (210) is provided with two fourth plug pipes (212), the two fourth plug pipes (212) are arranged on the other side of the first rear wheel frame (210) relative to the second plug pipe (211), and are parallel to the second plug pipe (211), and the outer diameter of the fourth plug pipe (212) is not greater than the inner diameter of the third plug pipe (311).
7. The multi-configurable child tricycle of claim 3, wherein: The second plug pipe (211) and the third plug pipe (311) are provided with a third elastic member (410), the end of the first plug pipe (111) is provided with a stop block (420) corresponding to the third elastic member (410), the third elastic member (410) and the stop block (420) are matched, so that the first plug pipe (111) has a tendency to move away from the second plug pipe (211) or the third plug pipe (311) respectively.
8. The multi-configurable child tricycle of claim 7, wherein: The third elastic member (410) is a spring, and the second plug pipe (211) and the third plug pipe (311) are provided with a clamping groove (411), and the inner diameter of the clamping groove (411) is the same as the outer diameter of the spring.
9. The multi-configurable child tricycle of claim 3, wherein: The second plug pipe (211) and the third plug pipe (311) are provided with a guide groove (430) at the opening, and the depth of the guide groove (430) gradually decreases from the inlet end to the fixed end.