A multifunctional child stroller with a dustproof transmission case

Abstract

The utility model discloses a multifunctional children's pushchair with dustproof transmission case, include: carrier, push handle, crank, frame, rocker, transmission mechanism and transmission case, the rocker sets up between the carrier front part and frame, and the upper end of rocker is connected with the carrier pin, and the lower end is connected with the frame pin, push handle is opposite fixedly connected with the frame, the crank axle and drive shaft are driven through transmission mechanism, and the drive wheel is established in the drive shaft, and the crank is fixedly connected on the crank axle, transmission mechanism includes driving wheel, transmission part and driven wheel, and the driving wheel coaxial sleeve is established on the drive shaft, and the driven wheel coaxial sleeve is established on the crank axle, and the driving wheel and driven wheel are driven through transmission part, transmission case sets up at the rear end of frame, and the crank axle and drive shaft all rotate and are arranged on transmission case, and the carrier is provided with seat, and the crank axle is located below seat, and the crank is connected with the lateral wall pin of carrier, the top of transmission case is provided with dustproof cover, the utility model discloses can improve the service life and safety of child's car.

Description

Technical Field

[0001] This utility model belongs to the field of children's stroller technology, specifically relating to a multifunctional children's stroller with a dustproof transmission box. Background Technology

[0002] Rocking horses can make undulating movements, which makes children who sit on them feel fun and excited, increasing their enjoyment of playing.

[0003] A rocking horse, as described in patent publication CN101492066A, has multiple functions: a horizontal movement function and a rocking function. In the rocking function, pushing the handle rotates the rear drive wheel, which in turn rotates the drive shaft, which is directly connected to it. The drive shaft then rotates the drive gear, which in turn rotates the driven gear via an idler gear, causing the crank shaft and crank to rotate synchronously. The crank, through a connecting rod, causes the carrier body to undulate. Combined with the front rocking mechanism, this causes the carrier body to rock back and forth, ultimately resulting in a regular up-and-down and back-and-forth rocking motion. In the horizontal movement function, axially moving the idler gear frame, opening the idler gear frame, or operating the clutch mechanism disengages the transmission mechanism. In this state, pushing the handlebars prevents the carrier body from making a wavy motion.

[0004] However, the aforementioned drive gears, driven gears, idler gears, and other transmission components are directly exposed to the external environment, making them susceptible to dust, rain, or foreign objects, leading to increased wear, decreased transmission efficiency, and even jamming, thus affecting the lifespan of the stroller. Furthermore, directly installing rectangular dustproof housings on these transmission components, combined with the design of the carrier's shape and its movement, may cause interference between the dustproof housing and the carrier. Utility Model Content

[0005] In view of this, the present invention provides a multifunctional children's stroller with a dustproof transmission box, which not only protects the transmission components inside the gearbox from dust but also prevents interference between the transmission components and the load-bearing body.

[0006] This utility model is achieved through the following technical solution: A multi-functional children's stroller with a dustproof transmission box includes: a carrier, a push handle, a crank, a frame, a rocker arm, and a transmission mechanism; The rocker arm is positioned between the front of the carrier and the frame, with its upper end pinned to the carrier and its lower end pinned to the frame. The push handle is fixedly connected to the frame. The crankshaft and drive shaft are driven by a transmission mechanism, with the drive wheel mounted on the drive shaft. The crank is fixedly connected to the crankshaft. The transmission mechanism includes a drive wheel, a transmission component, and a driven wheel. The drive wheel is coaxially mounted on the drive shaft, and the driven wheel is coaxially mounted on the crankshaft. The drive wheel and driven wheel are driven by a transmission component. The stroller also includes a transmission box; The transmission case is located at the rear end of the frame. The crankshaft and drive shaft are both rotatably mounted on the transmission case. A seat is mounted on the carrier, and the crankshaft is located below the seat. The crankshaft is pinned to the side wall of the carrier. The top of the transmission box is equipped with a dust cover.

[0007] Furthermore, the top front end of the dust cover is provided with an arched part, and the driven wheel is located below the arched part; the rear end of the carrier body is bent downwards, and the top rear end of the dust cover is horizontal.

[0008] Furthermore, the transmission case also includes a side frame; the crankshaft is located at the top front end of the side frame.

[0009] Furthermore, the drive shaft is located at the bottom rear end of the side frame; The transmission box also includes a base plate; The bottom outer side of the base plate is provided with protrusion I and protrusion II. The inner side of the base plate corresponding to protrusion I forms groove I, and the inner side of the base plate corresponding to protrusion II forms groove II. The drive shaft passes through groove I and groove II in sequence; The width of groove I is greater than the width of groove II, and the depth of groove I is greater than the depth of groove II; the drive wheel is located inside groove I.

[0010] Furthermore, support grooves are provided on the two side walls of the transmission box.

[0011] Furthermore, the bent portion at the rear end of the carrier is integrally formed with the side wall of the carrier.

[0012] Furthermore, the driving wheel is a driving gear, the driven wheel is a driven gear, and the transmission components are an idler gear carrier and an idler gear. The outer diameter of the driving gear is smaller than the outer diameter of the driven gear.

[0013] Furthermore, the driving wheel is a driving pulley or sprocket, the driven wheel is a driven pulley or sprocket, the transmission component is a belt or chain, and the outer diameter of the driving pulley or sprocket is smaller than the outer diameter of the driven pulley or sprocket.

[0014] Furthermore, when the crank pin axis is at its highest point, the vertical distance H between the top and bottom pin axes of the rocker arm is greater than or equal to the crank's eccentricity. The crank eccentricity ranges from 20mm to 60mm, and the maximum pitch angle θ of the seat surface ranges from 0° to 30°.

[0015] Furthermore, the horizontal distance D between the bottom pin axis of the rocker arm and the axis of the crankshaft ranges from 200mm to 400mm, and the vertical distance H between the top pin axis and the bottom pin axis of the rocker arm 4 ranges from 20mm to 340mm.

[0016] Beneficial effects: (1) The present invention provides a multifunctional children's stroller with a dustproof transmission box. The top of the transmission box is provided with a dustproof cover to prevent dust, rain or foreign objects from entering the transmission mechanism, prevent the transmission mechanism from being worn and jammed, and improve the service life and safety of the stroller.

[0017] (2) The horizontal rear end of the transmission mechanism can make way for the movement of the carrier when the carrier makes wave motion, so as to prevent interference between the carrier and the dust cover.

[0018] (3) The crankshaft of this utility model is set at the top front end of the side frame; since the crank will drive the carrier to move downward when it rotates, the crankshaft is set at the top front end of the side frame to make room for the rotation of the crank, prevent the carrier from interfering with the ground, or the crank from interfering with the drive shaft.

[0019] (4) By setting protrusion I and protrusion II at the bottom of the base plate, the drive shaft can be installed. On the one hand, it can meet the low-position installation requirements of the drive shaft (because if the installation is too high, the diameter of the rear wheel will be too large and may interfere with the crank). On the other hand, it can save the material of the transmission box.

[0020] (5) The bent part at the rear end of the carrier body of this utility model is integrally formed with the side wall of the carrier body, which can increase the support strength of the seat and hide part of the frame and transmission box at the bottom of the carrier body, ensuring the aesthetic appearance of the stroller.

[0021] (6) By simultaneously limiting the eccentricity of the crank and the pitch angle of the carrier, this utility model ensures that the movement range of the stroller is moderate and prevents excessive swaying. It can produce obvious undulations, enhance the fun, and not be too violent, thus ensuring the safety and comfort of infants and young children.

[0022] (7) In this utility model, the crankshaft, chassis, rocker arm, and carrier form a crank-rocker structure or a double-crank structure. After the eccentricity of the crank is relatively determined, the horizontal distance D between the axis of the bottom pin shaft of the rocker arm and the axis of the crankshaft has a significant impact on the pitch angle. This invention sets the range of the above-mentioned horizontal distance D to 200mm~400mm to facilitate the design of the pitch angle. At the same time, the range of the vertical distance H of the rocker arm in the vertical direction is 20mm~340mm, which quantifies the geometric constraints formed between the crankshaft, chassis, rocker arm, and carrier, and facilitates the overall design of the trolley. Attached Figure Description

[0023] Figure 1 The present invention relates to the structure of a multifunctional children's stroller with a dustproof transmission box. Figure I ; Figure 2The installation position and structure of the dustproof transmission box of this utility model Figure I ; Figure 3 This is a structural diagram of the dust cover of this utility model; Figure 4 The installation position and structure of the dustproof transmission box of this utility model Figure II ; Figure 5 The base plate structure of the dust cover of this utility model Figure I Figure 6 The dust cover base plate structure of this utility model Figure II ; Figure 7 This is a side view of a utility model dustproof transmission box; Figure 8 The structure of a multi-functional children's stroller with a dustproof transmission box Figure II (No carrier); Figure 9 This is a simplified diagram of the crank-rocker structure of this utility model.

[0024] Among them, 1-carrier, 2-crank, 3-frame, 4-rocker, 5-seat, 501-part of seat, 6-drive wheel, 7-transmission mechanism, 8-drive shaft, 9-crankshaft, 10-buffer spring, 11-sliding sleeve, 12-guide block, 13-guide boss, 14-transmission box, 15-dust cover, 151-arched part, 152-horizontal part, 16-base plate, 161-protrusion I, 162-protrusion II, 163-groove I, 164-groove II, 165-support groove, 17-side frame, 18-push handle. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] This embodiment provides a multi-functional children's stroller with a dustproof transmission box; see attached document. Figure 1-3 8, including: a load-bearing body 1, a push handle 18, a crank 2, a frame 3, a rocker arm 4, a transmission box 14, and a transmission mechanism 7; The rocker arm 4 is located between the front of the carrier 1 and the frame 3. The upper end of the rocker arm 4 is pinned to the side wall of the carrier 1, and the lower end is pinned to the frame 3. The push handle 18 is fixedly connected to the frame 3. The transmission box 14 is located at the rear end of the frame 3. The crankshaft 9 and the drive shaft 8 are both rotatably mounted on the transmission box 14. The crank 2 is fixedly connected to the crankshaft 9 and is pin-connected to the carrier 1. The two rear wheels are located at both ends of the drive shaft 8, with one of the rear wheels serving as the drive wheel. The crankshaft 9 and the drive shaft 8 are driven by a transmission mechanism 7, which is located inside the transmission box 14. A seat 5 is mounted on the carrier 1; a crankshaft 9 is located below the seat 5; the rear end of the carrier 1 is bent downwards; the bent part is integrally formed with the side wall of the carrier. The crankshaft 9 is located at the front end of the transmission housing 14; a dust cover 15 is provided on the top of the transmission housing 14, and an arched part 151 is provided at the front end of the top of the dust cover 15, which is coaxial with the crankshaft 9; the rear end of the top of the dust cover 15 is horizontal, forming a horizontal part 152.

[0027] This embodiment provides a multi-functional children's stroller with a dustproof transmission box. The top of the transmission box 14 is provided with a dustproof cover 15, which can prevent dust, rainwater or foreign objects from entering the transmission mechanism 7, prevent wear and jamming of the transmission mechanism, and improve the service life of the stroller. At the same time, the horizontal rear end of the dustproof cover 15 can make way for the movement of the carrier 1 when the carrier 1 is in a wave-like motion, and prevent interference between the carrier 1 and the dustproof cover 15.

[0028] For further details, please see the appendix. Figure 4-7 The transmission box 14 also includes a side frame 17 and a base plate 16; The crankshaft 9 is located at the top front end of the side frame 17. Since the crank 2 will drive the carrier to move downward when it rotates, the crankshaft 9 is located at the top front end of the side frame 17 to make room for the rotation of the crank 2 and prevent the carrier from interfering with the ground or the crank from interfering with the drive shaft 8.

[0029] The drive shaft 8 is located at the bottom rear end of the side frame 17; the base plate 16 is connected to the bottom of the side frame 17; the bottom outer side of the base plate 16 is provided with protrusion I 161 and protrusion II 162, the inner side of the base plate 16 corresponding to protrusion I 161 forms groove I 163, and the inner side of the base plate 16 corresponding to protrusion II 162 forms groove II 164; the drive shaft 8 passes through groove I 163 and groove II 164 in sequence; The transmission mechanism 7 includes a driving wheel, a transmission component, and a driven wheel. The driving wheel is coaxially mounted on the drive shaft 8, and the driven wheel is coaxially mounted on the crankshaft 9. The driving wheel and the driven wheel are driven by the transmission component. The width of groove I 163 is greater than the width of groove II 164, and the depth of groove I 163 is greater than the depth of groove II 164. The driving wheel is located inside groove I 163. The driven wheel is located below the arched part 151. By setting protrusions I 161 and II 162 at the bottom of the base plate 16 to install the drive shaft 8, the low-position installation requirement of the drive shaft can be met (because if the installation is too high, the diameter of the rear wheel will be too large and may interfere with the crank). On the other hand, the material of the transmission box 14 can be saved.

[0030] The two side walls of the transmission box 14 are also provided with support grooves 165, which cooperate with the side frame 17 to provide limiting support for the drive shaft 8.

[0031] In one specific embodiment, the driving pulley is a driving belt pulley, the driven pulley is a driven belt pulley, the transmission component is a belt, and the outer diameter of the driving belt pulley is smaller than the outer diameter of the driven belt pulley; Alternatively, the driving gear is the driving gear, the driven gear is the driven gear, and the transmission components are an idler gear carrier and an idler gear, with the outer diameter of the driving gear being smaller than the outer diameter of the driven gear.

[0032] Alternatively, the driving sprocket is the driving sprocket, the driven sprocket is the driven sprocket, the transmission component is the chain, and the outer diameter of the driving sprocket is smaller than the outer diameter of the driven sprocket.

[0033] Furthermore, when the pin joint axis of crank 2 is at its highest, the vertical distance H between the top pin joint axis and the bottom pin joint axis of rocker 4 is greater than or equal to the eccentricity of crank 2. The eccentricity of crank 2 ranges from 20mm to 60mm, and the maximum pitch angle θ of seat 5 ranges from 0° to 30°. This ensures that the stroller's range of motion is moderate and prevents excessive swaying, producing a noticeable undulating sensation to enhance enjoyment without being too violent, thus guaranteeing the safety and comfort of infants and toddlers.

[0034] It should be noted that the maximum pitch angle θ of the seat 5 is the angle between the extreme position of the seat tilting forward and the extreme position of the seat tilting backward when the stroller is rocking. Let the horizontal plane where the top pin joint axis of the rocker 4 is located be horizontal plane I, and the horizontal plane where the bottom pin joint axis of the rocker is located be horizontal plane II. The distance between horizontal plane I and horizontal plane II is the aforementioned vertical distance H.

[0035] The eccentricity is the distance between the pin connection axis of crank 2 and bearing 1 and the axis of crankshaft 9; Appendix Figure 9 The horizontal line located on the carrier 1 is not the simplified entire seat 5, but a portion of the seat 501. The horizontal distance D between the bottom pin axis of the rocker arm 4 and the axis of the crankshaft 9 ranges from 200mm to 400mm, and the vertical distance H between the top pin axis and the bottom pin axis of the rocker arm 4 ranges from 20mm to 340mm. By determining D and H within the above ranges, the geometric constraints formed between the crankshaft 9, the chassis 3, the rocker arm 4, and the carrier 1 are quantified.

[0036] The eccentricity of crank 2 is 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm or 60mm; In one specific embodiment, the crank 2 eccentricity is 20mm, the horizontal distance D is 400mm, the vertical distance H is 20mm, and the maximum pitch angle θ of the seat surface is 0°. In another specific embodiment, the crank 2 eccentricity is 20mm, the horizontal distance D is 400mm, the vertical distance H is 300mm, and the maximum pitch angle θ of the seat surface is 5.7°. In another specific embodiment, the crank 2 eccentricity is 20mm, the horizontal distance D is 200mm, the vertical distance H is 168mm, and the maximum pitch angle θ of the seat surface is 11.3°. In another specific embodiment, the crank 2 eccentricity is 30mm, the horizontal distance D is 400mm, the vertical distance H is 310mm, and the maximum pitch angle θ of the seat surface is 8.7°. In another specific embodiment, the crank 2 eccentricity is 30mm, the horizontal distance D is 386mm, the vertical distance H is 320mm, and the maximum pitch angle θ of the seat surface is 8.8°. In another specific embodiment, the crank 2 eccentricity is 30mm, the horizontal distance D is 294mm, the vertical distance H is 204mm, and the maximum pitch angle θ of the seat surface is 11.6°. In another specific embodiment, the crank 2 eccentricity is 30mm, the horizontal distance D is 200mm, the vertical distance H is 120mm, and the maximum pitch angle θ of the seat surface is 17°. In another specific embodiment, the crank 2 eccentricity is 50mm, the horizontal distance D is 400mm, the vertical distance H is 330mm, and the maximum pitch angle θ of the seat surface is 14.5°. In another specific embodiment, the crank 2 eccentricity is 50mm, the horizontal distance D is 230mm, the vertical distance H is 120mm, and the maximum pitch angle θ of the seat surface is 25°. In another specific embodiment, the crank 2 eccentricity is 50mm, the horizontal distance D is 200mm, the vertical distance H is 198mm, and the maximum pitch angle θ of the seat surface is 30°. In another specific embodiment, the crank 2 eccentricity is 60mm, the horizontal distance D is 400mm, the vertical distance H is 340mm, and the maximum pitch angle θ of the seat surface is 17.5°. In another specific embodiment, the crank 2 eccentricity is 60mm, the horizontal distance D is 350mm, the vertical distance H is 140mm, and the maximum pitch angle θ of the seat surface is 20°.

[0037] In another specific embodiment, the crank 2 eccentricity is 60mm, the horizontal distance D is 280mm, the vertical distance H is 132mm, and the maximum pitch angle θ of the seat surface is 25°.

[0038] In another specific embodiment, the crank 2 eccentricity is 60mm, the horizontal distance D is 230mm, the vertical distance H is 132mm, and the maximum pitch angle θ of the seat surface is 30°.

[0039] Crank 2 can be a rod-shaped crank, a fan-shaped crank, or a circular crank; When the pin shaft of crank 2 is at its highest point, rocker arm 4 can be set at an angle or vertically; rocker arm 4 can be a straight rod, a curved rod, or an irregularly shaped rod.

[0040] A buffer spring 10 is installed between the carrier 1 and the chassis 3 to buffer the descent of the carrier 1.

[0041] The seats can be equipped with guardrails and backrests to ensure children's safety.

[0042] Dustproof box design principle: The top of the transmission box 14 is equipped with a dust cover 15 to prevent dust, rainwater, or foreign objects from entering the transmission mechanism 7, thus preventing wear and jamming and extending the lifespan of the stroller. Meanwhile, the rear end of the carrier 1 bends downwards to increase the support strength for the seat 5 and to conceal part of the frame and transmission box at the bottom of the carrier, ensuring the stroller's aesthetic appearance. The front end of the transmission mechanism has an arched section 151 for coaxial dust protection with the crankshaft 9, while the horizontal rear end provides space for the carrier 1 to move during wave-like motion, preventing interference between the carrier 1 and the dust cover 15.

[0043] Crank rocker arm design principle: Based on the World Health Organization (WHO) child growth standards, the stroller seat height should not be too high and should be adapted to the child's height. Therefore, when the pin axis of crank 2 is at its highest point, the distance between the highest point of the seat 5 and the ground is between 370mm and 420mm. Since the crank shaft is located under the seat, the crank size needs to be designed based on this data to ensure that the crank does not interfere with the ground or other components when rotating.

[0044] Under the above constraints, the length of crank 2 mainly determines the vertical undulation and swaying amplitude (i.e., pitch angle) of the carrier 1, and the horizontal distance D between the bottom pin of rocker arm 4 and crank shaft 9 mainly controls the swaying amplitude. In this invention, whether the eccentricity is 60mm and the horizontal distance D is 230mm, or the eccentricity is 50mm and the horizontal distance D is 200mm, or the distance D is 20mm and the distance is 400mm, the stroller can achieve undulation and swaying within a safe and reasonable range, increasing the fun of children riding.

[0045] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A multi-functional children's stroller with a dustproof transmission box, comprising: The load-bearing body, push handle, crank, frame, rocker arm, and transmission mechanism; The rocker arm is positioned between the front of the carrier and the frame, with its upper end pinned to the carrier and its lower end pinned to the frame. The push handle is fixedly connected to the frame. The crankshaft and drive shaft are driven by a transmission mechanism, with the drive wheel mounted on the drive shaft. The crank is fixedly connected to the crankshaft. The transmission mechanism includes a drive wheel, a transmission component, and a driven wheel. The drive wheel is coaxially mounted on the drive shaft, and the driven wheel is coaxially mounted on the crankshaft. The drive wheel and driven wheel are driven by a transmission component. The stroller is characterized in that it further includes a transmission box; The transmission case is located at the rear end of the frame. The crankshaft and drive shaft are both rotatably mounted on the transmission case. A seat is mounted on the carrier, and the crankshaft is located below the seat. The crankshaft is pinned to the side wall of the carrier. The top of the transmission box is equipped with a dust cover.

2. The multifunctional child stroller with a dustproof transmission box as described in claim 1, characterized in that, The top front end of the dust cover is provided with an arched part, and the driven wheel is located below the arched part; the rear end of the carrier body is bent downwards, and the top rear end of the dust cover is horizontal.

3. The multifunctional child stroller with a dustproof transmission box as described in claim 2, characterized in that, The transmission case also includes a side frame; the crankshaft is located at the top front end of the side frame.

4. The multifunctional children's stroller with a dustproof transmission box as described in claim 3, characterized in that, The drive shaft is located at the bottom rear end of the side frame; The transmission box also includes a base plate; The bottom outer side of the base plate is provided with protrusion I and protrusion II. The inner side of the base plate corresponding to protrusion I forms groove I, and the inner side of the base plate corresponding to protrusion II forms groove II. The drive shaft passes through groove I and groove II in sequence; The width of groove I is greater than the width of groove II, and the depth of groove I is greater than the depth of groove II; the drive wheel is located inside groove I.

5. A multi-functional children's stroller with a dustproof transmission box as described in claim 4, characterized in that, Support grooves are also provided on the two side walls of the transmission box.

6. A multi-functional children's stroller with a dustproof transmission box as described in any one of claims 2-5, characterized in that, The bent portion at the rear end of the carrier is integrally formed with the side wall of the carrier.

7. The multifunctional child stroller with a dustproof transmission box as described in any one of claims 1-5, characterized in that, The driving gear is the driving gear, the driven gear is the driven gear, and the transmission components are the idler gear carrier and the idler gear. The outer diameter of the driving gear is smaller than the outer diameter of the driven gear.

8. The multifunctional child stroller with a dustproof transmission box as described in any one of claims 1-5, characterized in that, The driving pulley is a driving belt pulley or sprocket, the driven pulley is a driven belt pulley or sprocket, and the transmission component is a belt or chain. The outer diameter of the driving belt pulley or sprocket is smaller than the outer diameter of the driven belt pulley or sprocket.

9. A multi-functional children's stroller with a dustproof transmission box as described in any one of claims 1-5, characterized in that, When the crank pin axis is at its highest point, the vertical distance H between the top and bottom pin axes of the rocker arm is greater than or equal to the crank's eccentricity. The crank eccentricity ranges from 20mm to 60mm, and the maximum pitch angle θ of the seat surface ranges from 0° to 30°.

10. A multifunctional child stroller with a dustproof transmission box as described in claim 9, characterized in that, The horizontal distance D between the bottom pin joint axis of the rocker arm and the axis of the crank shaft ranges from 200mm to 400mm, and the vertical distance H between the top pin joint axis and the bottom pin joint axis of the rocker arm ranges from 20mm to 340mm.

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