A multifunctional child stroller with a closed gear box

Abstract

The utility model discloses a multifunctional children's pushchair with closed gear box, gear box sets up in the rear end of frame, both crank axle and drive shaft are rotated and are equipped on gear box, crank fixed connection is in on crank axle, and the bearing of crank and children's pushchair is connected, is provided with driving gear on drive shaft, is provided with driven gear on crank axle, and the meshing of driving gear and driven gear is provided with idle gear, seat positioning mechanism, driving gear, driven gear and idle gear limit setting are in the closed gear box. The utility model utilizes gear box to limit driving gear, driven gear, drive shaft and crank lever axle, to guarantee the stability and reliability of the heave movement of bearing, and prevent dust, rain or foreign matter from invading the gear box.

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 closed gearbox. 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, is multifunctional, featuring both horizontal movement and rocking motion. In rocking mode, 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 results in the carrier body rocking back and forth, ultimately creating a regular up-and-down and back-and-forth rocking motion. In horizontal movement mode, 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 handle prevents the carrier body from making a wavy motion.

[0004] However, the aforementioned stroller does not mention how to secure the drive gear, driven gear, drive shaft, and crankshaft, and the idler gear is only floatingly connected to the idler gear frame via a single pin. On one hand, the drive gear, driven gear, idler gear, and other transmission components are directly exposed to the external environment, making them susceptible to dust, rain, or foreign objects, leading to accelerated wear, reduced transmission efficiency, and even jamming, thus affecting the stroller's lifespan. On the other hand, the meshing center distance between the idler gear and driven gear may change with the stroller's vibrations, causing impact noise and abnormal wear on the gear teeth. Utility Model Content

[0005] In view of this, the present invention provides a multifunctional children's stroller with a closed gearbox. The gearbox limits the drive gear, driven gear, drive shaft and crank shaft to ensure the stability and reliability of the undulating movement of the load-bearing body, and to prevent dust, rain or foreign objects from entering the gearbox.

[0006] This utility model is achieved through the following technical solution:

[0007] A multi-functional children's stroller with a closed gearbox includes: a push handle, a crank, a frame, a carrier, and a rocking mechanism. The rocking mechanism is located between the front of the carrier and the frame. The upper end of the rocking mechanism is pinned to the carrier, and the lower end is pinned to the frame. A rear wheel serves as the drive wheel.

[0008] The stroller also includes: a gearbox and a seat positioning mechanism;

[0009] The gearbox is located at the rear of the frame;

[0010] Both the crankshaft and the drive shaft are rotatably mounted on the gearbox. The crank is fixedly connected to the crankshaft and pin-connected to the carrier of the stroller. The drive shaft is equipped with a drive gear, the crankshaft is equipped with a driven gear, and an idler gear meshes between the drive gear and the driven gear.

[0011] The seat positioning mechanism, drive gear, driven gear, and idler gear limit are set in a closed gearbox.

[0012] Furthermore, the gearbox includes a housing and a dust cover, with an opening at the top of the housing and the dust cover being closed and connected to the opening end of the housing.

[0013] Furthermore, a gear carrier is provided inside the gearbox for limiting the movement of the driving gear, driven gear, and idler gear, which are arranged side by side on the gear carrier for limiting the movement of the driving gear.

[0014] Furthermore, the inner bottom of the gearbox is provided with limit rib I and limit rib II in parallel, and the gearbox is locked between limit rib I and limit rib II.

[0015] Furthermore, the gear carrier includes a left gear carrier and a right gear carrier;

[0016] The left gear carrier has a shaft hole I at one end, and the right gear carrier has a shaft hole II at one end;

[0017] The driving gear includes a shoulder Ⅲ, a driving gear body, and a shoulder Ⅰ, which are coaxially connected from right to left. The driving gear body is located inside the gear carrier. The shoulder Ⅲ is engaged with the shaft hole Ⅱ of the right gear carrier, and the shoulder Ⅰ is engaged with the shaft hole Ⅰ of the left gear carrier. The driving gear is provided with a shaft hole through which the drive shaft passes.

[0018] Furthermore, a coaxial annular groove is provided on the drive shaft, the annular groove is located on the left side of the drive gear, and a retaining ring is engaged in the annular groove.

[0019] Furthermore, a U-shaped groove I is provided at the other end of the left gear frame, and a U-shaped groove II is provided at the other end of the right gear frame;

[0020] The driven gear includes a driven gear body and a gear shaft; the driven gear body is located inside the gear carrier, and the gear shaft is coaxially arranged at the left end of the driven gear body. The gear shaft is provided with a coaxial annular groove, and the gear shaft passes through the U-shaped groove I of the left gear carrier. The annular groove and the U-shaped groove I are engaged; the driven gear is provided with a shaft hole through which the crankshaft passes.

[0021] Furthermore, an idler wheel hole I is provided between the shaft hole I and the U-shaped groove I of the left gear carrier; an idler wheel hole II is provided between the shaft hole II and the U-shaped groove II of the right gear carrier.

[0022] One axial end of the idler gear is engaged with the shaft of idler gear hole I, and the other end is engaged with the shaft of idler gear hole II.

[0023] Furthermore, the seat positioning mechanism includes a spring, a sliding sleeve, and a lever;

[0024] The sliding sleeve is coaxially sleeved on the crankshaft and adjacent to the driven gear; the spring is coaxially limited on the side of the sliding sleeve away from the driven gear and abuts against the sliding sleeve.

[0025] The inner bottom surface of the gearbox is provided with a slide groove I, which is arranged along the crankshaft axis. A slider is provided at the bottom of the slide sleeve, and the slider is located in the slide groove.

[0026] The rear end of the gearbox is also provided with a through hole, through which the lever passes. The part of the lever inside the gearbox is hinged to the gearbox. The lever is also provided with a dial head, and the sliding sleeve is provided with a groove I. The dial head mates with the groove I. The through hole is provided with a locking groove.

[0027] When the stroller is switched to rocking function, the lever is in the locking groove, the spring is compressed, and the sliding sleeve is disengaged from the driven gear.

[0028] When the stroller seat is in position, the lever disengages from the locking groove, and the lever can rotate along the hinge point. Under the action of the spring force, the sliding sleeve engages with the driven gear.

[0029] Furthermore, this also includes the clutch sleeve;

[0030] A guide block is fixedly installed on the drive shaft, and a corresponding axial guide groove I is provided on the inner circumference of the clutch sleeve. The guide block is located in the guide groove I, so that the clutch sleeve can slide along the drive shaft.

[0031] The driving gear also includes a shoulder 2 located coaxially at the left end of shoulder 1; shoulder 2 is located outside the gear carrier, and shoulder 2 is provided with several guide bosses distributed along the circumference. The inner circumference of the clutch sleeve facing the driving gear is provided with several guide grooves 2 distributed along the circumference. The length direction of both the guide bosses and the guide grooves 2 is along the axial direction, and the guide bosses can be matched with the guide grooves 2 one by one.

[0032] The maximum diameter of the snap ring is smaller than the minimum inner diameter of the section where the clutch slide guide groove II is located;

[0033] The bottom surface of the lever is provided with a protrusion II, and the protrusion II is located on the side of the hinge point opposite to the lever head; the clutch sleeve is provided with a groove II, and the protrusion II cooperates with the groove II, so that the lever is moved to move the clutch sleeve at the same time.

[0034] When the stroller is rocking, the clutch sleeve moves away from the drive gear, and the guide boss disengages from the guide groove II.

[0035] When the stroller is in a horizontal position, the guide boss engages with the guide groove II.

[0036] Beneficial effects:

[0037] (1) This utility model provides a multi-functional children's stroller with a closed gearbox. By setting the seat positioning mechanism, driving gear, driven gear and idler gear in the gearbox, dust, rain or foreign objects can be prevented from entering the seat positioning mechanism and transmission components, preventing gear wear and jamming, and extending the service life of the stroller.

[0038] (2) The multifunctional children's stroller provided by this utility model has a gear frame in the gearbox, and the driving gear, driven gear and idler gear are arranged side by side on the gear frame; by setting the driving gear, driven gear and idler gear together on the gear frame, the positional relationship between the driving gear, driven gear and idler gear can be precisely controlled, so that the meshing between the gears is smooth, the noise is low and the stroller is more durable.

[0039] (3) This utility model utilizes the gearbox to be clamped between the limiting rib I and the limiting rib II, so that the gear frame can be pre-assembled and then placed into the gearbox as a whole, which not only ensures the positioning accuracy but also facilitates assembly.

[0040] (4) The shaft shoulder III and shaft shoulder I of the drive gear of this utility model are respectively engaged with the shaft hole II of the right gear carrier and the shaft hole I of the left gear carrier to achieve radial positioning. The drive shaft passes through the drive gear, and the snap ring at its annular groove abuts against the left side of the drive gear, which, together with the right shaft shoulder III, forms an axial double-sided lock to prevent the drive gear from moving and to ensure the installation accuracy of the drive gear.

[0041] (5) The gear shaft of the driven gear of this utility model passes through the U-shaped groove I of the left gear frame, and its annular groove is engaged with the U-shaped groove I to restrict the axial displacement of the driven gear and ensure the installation accuracy of the driven gear.

[0042] (6) The idler gear of this utility model is embedded in the idler wheel hole I of the left gear carrier and the idler wheel hole II of the right gear carrier at both ends. The axial and radial constraints are achieved through the hole-shaft fit, which ensures the installation accuracy of the idler gear. Attached Figure Description

[0043] Figure 1 This is a structural diagram of a multifunctional children's stroller with a closed gearbox according to the present invention;

[0044] Figure 2 This is an isometric view of the installation position of the gearbox of this utility model;

[0045] Figure 3 This is a diagram of the internal structure of the gearbox (including the seat positioning mechanism);

[0046] Figure 4A structural diagram showing the fit between the gearbox housing and the drive shaft;

[0047] Figure 5 For gear carrier and gear mating Figure I ;

[0048] Figure 6 For gear carrier and gear mating Figure II ;

[0049] Figure 7 This is a structural diagram of the left gear carrier;

[0050] Figure 8 This is a structural diagram of the right gear carrier;

[0051] Figure 9 This is a structural diagram of the drive shaft and the drive wheel;

[0052] Figure 10 This is a structural diagram of the driven gear;

[0053] Figure 11 Here is a structural diagram of the sliding sleeve;

[0054] Figure 12 This is a structural diagram of the lever.

[0055] Figure 13 This is a structural diagram of the through hole on the gearbox;

[0056] Figure 14 This is a structural diagram of the clutch sliding sleeve;

[0057] 1-Bearing body, 2-Push handle, 3-Gearbox, 301-Dust cover, 302-Box body, 303-Through hole, 3031-Locking groove, 3032-Protrusion I, 304-Slide groove, 4-Drive wheel, 5-Swing mechanism, 6-Frame, 7-Crankshaft, 8-Limiting component, 9-Spring, 10-Sliding sleeve, 1001-Limiting groove, 1002-Slider, 1003-Groove I, 11-Left gear bracket, 1101-U-shaped groove I, 1102-Idler wheel hole I, 1103-Groove column, 1104-Shaft hole I, 1105-Fixing hole, 12-Driven gear, 1201-Limiting boss, 1202-Ring 13-Right gear bracket, 1301-U-shaped groove II, 1302-Column with post, 1303-Idler gear hole II, 1304-Shaft hole II, 1305-Fixing post, 14-Idler gear, 15-Driving gear, 1501-Driving gear body, 1502-Shaft shoulder I, 1503-Guide boss, 1504-Shaft shoulder II, 1505-Shaft shoulder III, 16-Drive shaft, 1601-Guide block, 17-Pulley, 1701-Pulley head, 1702-Handle, 18-Clutch sleeve, 1801-Groove II, 1802-Guide groove II, 19-Limiting rib I, 20-Limiting rib II, 21-Snap ring. Detailed Implementation

[0058] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0059] Example 1:

[0060] This embodiment provides a multi-functional child stroller with a closed gearbox, see attached document. Figure 1-4 It includes: push handle 2, crank, frame 6, load-bearing body 1, rocking mechanism 5, gearbox 3 and seat positioning mechanism;

[0061] The swing mechanism 5 is located between the front of the carrier 1 and the frame 6. The upper end of the swing mechanism 5 is pinned to the carrier 1 and the lower end is pinned to the frame 6.

[0062] The gearbox 3 is located at the rear end of the frame 6, and the push handle 2 is connected to the rear end of the gearbox 3.

[0063] Both the crankshaft 7 and the drive shaft 16 are rotatably mounted on the gearbox 3. The crank is fixedly connected to the crankshaft 7 and pinned to the carrier 1 of the stroller. Two rear wheels are located at both ends of the drive shaft 16, with one of the rear wheels serving as the drive wheel.

[0064] A drive gear 15 is provided on the drive shaft 16, a driven gear 12 is provided on the crankshaft 7, and an idler gear 14 is meshed between the drive gear 15 and the driven gear 12.

[0065] The seat positioning mechanism, drive gear 15, driven gear 12 and idler gear 14 are limited within the enclosed gearbox 3.

[0066] This embodiment provides a multi-functional stroller with a closed gearbox. The closed gearbox 3 is provided. By limiting the seat positioning mechanism, the driving gear 15, the driven gear 12, and the idler gear 14 in the gearbox 3, dust, rainwater, or foreign objects can be prevented from entering the seat positioning mechanism and transmission components, preventing gear wear and jamming, and improving the service life of the stroller.

[0067] For further details, please see the appendix. Figure 1 and 2 The gearbox 3 includes a housing 302 and a dust cover 301. The top of the housing 302 is open, and the dust cover 301 is closed and connected to the open end of the housing 302. By providing a dust cover on the top of the housing 302, the gearbox 3 is sealed.

[0068] See appendix Figure 3The gearbox 3 is equipped with a gear carrier for limiting the position of the drive gear 15, driven gear 12 and idler gear 14. By limiting the position of the drive gear 15, driven gear 12 and idler gear 14 together on the gear carrier, the positional relationship between the drive gear 15, driven gear 12 and idler gear 14 can be precisely controlled, so that the meshing between the gears is smooth, the noise is low and the durability is greater.

[0069] See appendix Figure 4 The bottom of the gearbox 3 is provided with two parallel limiting ribs, I19 and II20. The gearbox 3 is locked between the limiting ribs I19 and II20, so that the gear frame is limited and set inside the gearbox 3. On the one hand, it can limit the gear frame. On the other hand, the gear frame and the gearbox 3 can be detachably connected. The gear frame and internal gears can be assembled externally and then assembled in the gearbox 3, which facilitates the assembly of the gear frame and internal gears.

[0070] See appendix Figure 5-8 The gear carrier includes a left gear carrier 11 and a right gear carrier 13; one end of the left gear carrier 11 is provided with a shaft hole I1104, and the other end is provided with a U-shaped groove I1101, and an idler wheel hole I1102 is provided between the shaft hole I1104 and the U-shaped groove I1101;

[0071] One end of the right gear carrier 13 is provided with a shaft hole II 1304, and the other end is provided with a U-shaped groove II 1301. An idler wheel hole II 1303 is provided between the shaft hole II 1304 and the U-shaped groove II.

[0072] See appendix Figure 5 and 6 One axial end of the idler gear 14 is engaged with the idler gear hole I 1102 shaft, and the other end is engaged with the idler gear hole II 1303 shaft;

[0073] See appendix Figure 9 The driving gear 15 includes a shoulder Ⅲ 1505, a driving gear body 1501, and a shoulder Ⅰ 1502, which are coaxially connected from right to left. The driving gear body 1501 is located inside the gear carrier. The shoulder Ⅲ 1505 is axially engaged with the shaft hole Ⅱ 1304 of the right gear carrier 13, and the shoulder Ⅰ 1502 is axially engaged with the shaft hole Ⅰ 1104 of the left gear carrier 11. A coaxial annular groove is provided on the drive shaft 16. The annular groove is located on the left side of the driving gear 15. A retaining spring 21 is installed on the annular groove. The retaining spring 21 is used to axially limit the left side of the driving gear 15. The driving gear 15 is provided with a shaft hole through which the drive shaft 16 passes.

[0074] See appendix Figure 10The driven gear 12 includes a driven gear body and a gear shaft. The driven gear body is located inside the gear carrier, and the gear shaft is coaxially disposed at the left end of the driven gear body. The gear shaft is provided with a coaxial annular groove 1202. The gear shaft passes through the U-shaped groove I 1101 of the left gear carrier 11. The annular groove 1202 cooperates with the U-shaped groove I 1101, and the U-shaped groove I 1101 axially limits the driven gear body. The driven gear 12 is provided with a shaft hole through which the crankshaft 7 passes. The crankshaft 7 coaxially passes through the U-shaped groove II 1301 of the right gear carrier 13 and the driven gear 12.

[0075] See appendix Figure 7 and 8 The left gear frame 11 is provided with two or more columns I, and the right gear frame 13 is provided with two or more columns II. The columns I and II are in a one-to-one convex-concave fit, so that the left gear frame 11 and the right gear frame 13 are combined to form a gear frame.

[0076] Furthermore, the column I of the left gear frame 11 is a grooved column 1103, and the end of the grooved column 1103 is provided with a groove. The column II of the right gear frame 13 is a column 1302, and the end of the column 1302 is provided with a protruding column, which fits into the groove.

[0077] In one specific embodiment, a fixing post 1305 is provided on the right gear carrier 13, and a fixing hole 1105 is provided on the left gear carrier 11. The fixing post 1305 and the fixing hole 1105 are engaged to further improve the connection strength of the gear carrier.

[0078] The seat positioning mechanism is used to limit and fix the seat in place when the vehicle is in flat-walking mode or when children are getting in and out of the vehicle. See appendix. Figure 3 , 10 -12 The seat positioning mechanism includes a spring 9, a sliding sleeve 10 and a lever 17; the sliding sleeve 10 is coaxially sleeved on the crankshaft 7 and adjacent to the driven gear 12; the spring 9 is coaxially limited on the side of the sliding sleeve 10 away from the driven gear 12 and abuts against the sliding sleeve 10.

[0079] The inner bottom surface of the gearbox 3 is provided with a sliding groove I 304, which is arranged along the axial direction of the crankshaft 7. The bottom of the sliding sleeve 10 is provided with a slider 1002, which is located in the sliding groove.

[0080] The rear end of the gearbox 3 is also provided with a through hole 303, through which the lever 17 passes. The part of the lever 17 located inside the gearbox 3 is hinged to the gearbox 3. The lever 17 is also provided with a dial head 1701, and the sliding sleeve 10 is provided with a groove I 1003. The dial head 1701 cooperates with the groove I 1003. The through hole 15 is provided with a locking groove 3031.

[0081] When the stroller is switched to rocking function, the lever 17 is located in the locking groove 3031, the spring 9 is in a compressed state, and the sliding sleeve 10 is disengaged from the driven gear 12.

[0082] When the stroller seat is in position, the lever 17 disengages from the locking groove 3031, and the lever 17 can rotate along the hinge point. Under the action of the spring 9, the sliding sleeve 10 engages with the driven gear 12.

[0083] The driven gear 12 also includes a limiting boss 1201; the limiting boss 1201 is located at the left end of the gear shaft, and the right end of the sliding sleeve 10 is provided with a limiting groove 1001, allowing the seat to be positioned during rocking. Furthermore, the driven gear 12 has a limiting boss 1201, and the sliding sleeve 10 has a limiting groove 1001, ensuring the seat is positioned only at specific locations during rocking. Furthermore, when the limiting groove 1001 and the limiting boss 1201 engage under the action of the spring 9, the seat is horizontal. Additionally, the seat can be positioned at other angles. Furthermore, a limiting groove 1001 can be provided on the driven gear 12, and a limiting boss 1201 can be provided on the sliding sleeve 10.

[0084] The groove I1003 can be an annular groove coaxial with the sliding sleeve 10, or it can be a coaxial arc groove, a circular groove extending radially, a square groove, or other polygonal grooves.

[0085] A limiting member 8 is also coaxially fixedly connected to the crankshaft 7. One end of the spring 9 abuts against the limiting member 8, and the other end abuts against the sliding sleeve 10. The limiting member 8 can be connected to the crankshaft 7 by screws, bolts, snap-fit, or rotation.

[0086] See appendix Figure 13 The through hole 3035 includes a first hole segment and a second hole segment that are connected. The height of the second hole segment is greater than the height of the first hole segment, so that a corner is formed between the first hole segment and the second hole segment. A protrusion I 3032 extending towards the end of the second hole segment is provided at the corner. The protrusion I 3032 and the adjacent sidewall of the second hole segment form the aforementioned locking groove 3031.

[0087] The first end of the lever 17 located inside the housing 17 is designated as the first end, and the second end located outside the housing 17 is designated as the second end, which is the handle 1702. The hinge point of the lever 17 is adjacent to the dial head 1701 (adjacent means that the center distance between the hinge point and the dial head 1701 is less than the net distance between the hinge point and the side wall of the gearbox 3 where the through hole 3035 is located), and the thickness at the hinge point of the lever 17 is greater than the thickness of the handle 1702. In this embodiment, the hinge point of the lever 17 is adjacent to the dial head 1701, so that when the dial head 1701 is turned by the lever 17, the dial head 1701 does not deform significantly, and the sliding sleeve 10 can be turned smoothly; moreover, the lever arm is longer when turning, which saves more effort; secondly, the handle 1702 is thinner and can deform in the vertical direction, making it smoother when the handle 1702 is engaged in or removed from the locking groove.

[0088] Dustproof and waterproof principle: The seat positioning mechanism, drive gear 15, driven gear 12, and idler gear 14 are limited in the closed gearbox 3, which can prevent dust, rain or foreign objects from entering the seat positioning mechanism and transmission components, prevent gear wear and jamming, and improve the service life of the stroller.

[0089] Gear position limiting principle: First, the gear carrier is fixed by the limiting ribs I19 and II20 at the bottom of the gearbox 3, limiting its displacement within the gearbox 3. This allows the gear carrier to be pre-assembled and then placed into the gearbox 3 as a whole, ensuring both positioning accuracy and ease of assembly. Second, the shaft shoulders III1505 and I1502 of the driving gear 15 respectively engage with the shaft holes II1304 of the right gear carrier 13 and I1104 of the left gear carrier 11 to achieve radial positioning. The drive shaft 16 passes through the driving gear 15, and the retaining ring 21 at its annular groove abuts against the left side of the driving gear 15, forming an axial double-sided lock with the right shaft shoulder III1505 to prevent the driving gear 15 from moving. Third, the gear shaft of the driven gear 12 passes through the U-shaped groove I1101 of the left gear carrier 11, and its annular groove 1202 engages with the U-shaped groove I1101, limiting the axial displacement of the driven gear. The crankshaft 7 passes through the gear shaft, providing radial support and ensuring the gear body remains in a stable meshing position within the gear carrier. Finally, the idler gear 14 is respectively inserted into the idler wheel hole I 1102 of the left gear carrier 11 and the idler wheel hole II 1303 of the right gear carrier 13, achieving radial constraint through the hole-shaft fit. In summary, the positions of all gears in three-dimensional space are precisely fixed, ensuring the gears always maintain optimal meshing, effectively reducing vibration and wear, and achieving the transmission goal of low noise and high durability.

[0090] Seat positioning principle: When the stroller is stationary or switched to the leveling function, and the seat needs to be positioned horizontally, first use the handle 1702 to move the lever 17 from the locking groove 3031 towards the end of the second hole (i.e., on the right in the figure), then move the lever 17 upwards until it is flush with the first hole, releasing the locking groove 3031 from limiting the lever 17; continue pushing the stroller to rotate the driven gear 12 until it rotates until the limiting boss 1201 on the driven gear 12 aligns with the limiting groove 1001 of the sliding sleeve 10. Yes, under the action of the spring 9, the slider 1002 of the sliding sleeve 10 moves along the groove 304 of the gearbox 3 towards the driven gear 12. At the same time, the limiting boss 1201 and the limiting groove 1001 are engaged, and the lever 17 is located at the first hole section of the through hole 15 under the action of the groove I 1003 of the sliding sleeve 10 on the lever head 1701. Since the groove 304 restricts the rotation of the sliding sleeve 10, the driven gear 12 that is engaged with the sliding sleeve 10 is also unable to rotate, thus realizing the positioning of the crank.

[0091] When switching the stroller to the rocking function, to release the seat restriction, first move the lever 17 towards the end of the second hole section using the toggle handle 1702, then press down on the lever 17. The lever 17 can rotate around its hinge point with the gearbox 3, causing the dial 1701 on the lever 17 to move away from the driven gear 12. Since the dial 1701 cooperates with the groove I1003 on the sliding sleeve 10, the dial 1701 drives the sliding sleeve 10 away from the driven gear 12, causing the driven gear 12 and the sliding sleeve 10 to disengage from each other. The driven gear 12 can resume rotation, releasing the restriction on the seat movement. At the same time, under the elastic force of the spring 9, the lever 17 enters the locking groove 3031, locking the lever 17.

[0092] Example 2:

[0093] This embodiment is based on Embodiment 1, see Appendix Figure 4 and 14 The multi-functional stroller also includes a clutch sleeve 18, which is used to engage and disengage between the drive shaft 16 and the drive gear 15, thereby enabling the multi-functional stroller to switch between flat walking and rocking functions.

[0094] A guide block 1601 is fixedly installed on the drive shaft 16. A corresponding axial guide groove I is provided on the inner circumference of the clutch sleeve 18. The guide block 1601 is located in the guide groove I, so that the clutch sleeve 18 can slide along the drive shaft 16.

[0095] The driving gear 15 also includes a shoulder 1504 coaxially located at the left end of shoulder 1502; shoulder 1504 is located outside the gear carrier, and a number of guide bosses 1503 distributed along the circumference are provided on shoulder 1504. A number of guide grooves 1802 distributed along the circumference are provided on the inner circumference of the end of the clutch sleeve 18 facing the driving gear 15. The length direction of both the guide bosses 1503 and the guide grooves 1802 is along the axial direction, and the guide bosses 1503 can be matched with the guide grooves 1802 one by one.

[0096] The bottom surface of the middle part of the lever 17 is provided with a protrusion II, and the protrusion II is located on the side of the hinge point opposite to the lever head 1701; the clutch sleeve 18 is provided with a groove II 1801, and the protrusion II cooperates with the groove II 1801. Moving the lever 17 simultaneously moves the clutch sleeve 18.

[0097] When the stroller is rocking, the clutch sleeve 18 moves away from the drive gear 15, and the guide boss 1503 disengages from the guide groove 1802.

[0098] When the stroller is in a horizontal position, the guide boss 1503 engages with the guide groove Ⅱ1802.

[0099] Furthermore, the groove II1801 can be an annular groove coaxial with the clutch sleeve 18, or it can be a coaxial arc groove, a circular groove extending radially, a square groove, or other polygonal grooves.

[0100] The maximum diameter of the snap ring 21 is smaller than the minimum inner diameter of the section where the clutch sleeve 18 guide groove II 1802 is located, so that the clutch sleeve 18 can cooperate smoothly with the guide boss 1503.

[0101] Clutch principle:

[0102] When the stroller is stationary or moving horizontally, and the seat needs to be limited, the protrusion II simultaneously moves the clutch sleeve 18 along with the lever 17, causing the clutch sleeve 18 to move away from the drive gear 15. The guide groove II 1802 of the clutch sleeve 18 disengages from the guide boss 1503 on the drive gear 15. The guide block 1601 rotates with the drive shaft 16, thereby driving the clutch sleeve 18 to rotate. Since the guide groove II 1802 of the clutch sleeve 18 disengages from the guide boss 1503 on the drive gear 15, the drive gear 15 is rotatably connected to the drive shaft 16, so the drive gear 15 does not rotate. Consequently, there is no transmission between the drive gear 15 and the driven gear 12.

[0103] When the child stroller is rocking and the seat needs to be released, the protrusion II moves the clutch sleeve 18 along with the lever 17, causing the clutch sleeve 18 to move in the direction of the drive gear 15. The guide groove II 1802 of the clutch sleeve 18 engages with the guide boss 1503 on the drive gear 15. The guide block 1601 rotates with the drive shaft 16, which in turn drives the clutch sleeve 18 to rotate. Since the guide groove II 1802 of the clutch sleeve 18 engages with the guide boss 1503 on the drive gear 15, the drive gear 15 and the clutch sleeve 18 rotate synchronously, which in turn drives the driven gear 12 to rotate, causing the crank to rotate and the carrier 1 to rock.

[0104] 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 stroller with a closed gearbox, comprising: The bicycle includes a push handle, crank, frame, carrier, and rocker mechanism. The rocker mechanism is located between the front of the carrier and the frame. The upper end of the rocker mechanism is pinned to the carrier, and the lower end is pinned to the frame. A rear wheel serves as the drive wheel. The stroller is characterized by further including: a gearbox and a seat positioning mechanism; The gearbox is located at the rear of the frame; Both the crankshaft and the drive shaft are rotatably mounted on the gearbox. The crank is fixedly connected to the crankshaft and pin-connected to the carrier of the stroller. The drive shaft is equipped with a drive gear, the crankshaft is equipped with a driven gear, and an idler gear meshes between the drive gear and the driven gear. The seat positioning mechanism, drive gear, driven gear, and idler gear limit are set in a closed gearbox.

2. The multi-functional stroller with a closed gearbox as described in claim 1, characterized in that, The gearbox includes a housing and a dust cover. The top of the housing is open, and the dust cover is closed and connected to the open end of the housing.

3. A multi-functional stroller with a closed gearbox as described in claim 1 or 2, characterized in that, The gearbox is equipped with a gear carrier for limiting the movement of the driving gear, driven gear, and idler gear, which are arranged side by side on the gear carrier for limiting the movement.

4. The multi-functional stroller with a closed gearbox as described in claim 3, characterized in that, Limiting ribs I and II are arranged side by side at the bottom of the gearbox, and the gearbox is locked between limiting ribs I and II.

5. A multi-functional child stroller with a closed gearbox as described in claim 4, characterized in that, The gear carrier includes a left gear carrier and a right gear carrier; The left gear carrier has a shaft hole I at one end, and the right gear carrier has a shaft hole II at one end; The driving gear includes a shoulder Ⅲ, a driving gear body, and a shoulder Ⅰ, which are coaxially connected from right to left. The driving gear body is located inside the gear carrier. The shoulder Ⅲ is engaged with the shaft hole Ⅱ of the right gear carrier, and the shoulder Ⅰ is engaged with the shaft hole Ⅰ of the left gear carrier. The driving gear is provided with a shaft hole through which the drive shaft passes.

6. A multi-functional child stroller with a closed gearbox as described in claim 5, characterized in that, The drive shaft is provided with a coaxial annular groove, which is located on the left side of the drive gear, and a retaining ring is engaged in the annular groove.

7. A multi-functional stroller with a closed gearbox as described in claim 6, characterized in that, The other end of the left gear frame is provided with U-shaped groove I, and the other end of the right gear frame is provided with U-shaped groove II; The driven gear includes a driven gear body and a gear shaft; the driven gear body is located inside the gear carrier, and the gear shaft is coaxially arranged at the left end of the driven gear body. The gear shaft is provided with a coaxial annular groove, and the gear shaft passes through the U-shaped groove I of the left gear carrier. The annular groove and the U-shaped groove I are engaged; the driven gear is provided with a shaft hole through which the crankshaft passes.

8. A multi-functional stroller with a closed gearbox as described in claim 7, characterized in that, An idler gear hole I is provided between the shaft hole I and the U-shaped groove I of the left gear carrier; an idler gear hole II is provided between the shaft hole II and the U-shaped groove II of the right gear carrier. One axial end of the idler gear is engaged with the shaft of idler gear hole I, and the other end is engaged with the shaft of idler gear hole II.

9. A multi-functional stroller with a closed gearbox as described in claim 8, characterized in that, The seat positioning mechanism includes a spring, a sliding sleeve, and a lever; The sliding sleeve is coaxially sleeved on the crankshaft and adjacent to the driven gear; the spring is coaxially limited on the side of the sliding sleeve away from the driven gear and abuts against the sliding sleeve. The inner bottom surface of the gearbox is provided with a slide groove I, which is arranged along the crankshaft axis. A slider is provided at the bottom of the slide sleeve, and the slider is located in the slide groove. The rear end of the gearbox is also provided with a through hole, through which the lever passes. The part of the lever inside the gearbox is hinged to the gearbox. The lever is also provided with a dial head, and the sliding sleeve is provided with a groove I. The dial head mates with the groove I. The through hole is provided with a locking groove. When the stroller is switched to rocking function, the lever is in the locking groove, the spring is compressed, and the sliding sleeve is disengaged from the driven gear. When the stroller seat is in position, the lever disengages from the locking groove, and the lever can rotate along the hinge point. Under the action of the spring force, the sliding sleeve engages with the driven gear.

10. A multi-functional stroller with a closed gearbox as described in claim 9, characterized in that, It also includes the clutch sleeve; A guide block is fixedly installed on the drive shaft, and a corresponding axial guide groove I is provided on the inner circumference of the clutch sleeve. The guide block is located in the guide groove I, so that the clutch sleeve can slide along the drive shaft. The driving gear also includes a shoulder 2 located coaxially at the left end of shoulder 1; shoulder 2 is located outside the gear carrier, and shoulder 2 is provided with several guide bosses distributed along the circumference. The inner circumference of the clutch sleeve facing the driving gear is provided with several guide grooves 2 distributed along the circumference. The length direction of both the guide bosses and the guide grooves 2 is along the axial direction, and the guide bosses can be matched with the guide grooves 2 one by one. The maximum diameter of the snap ring is smaller than the minimum inner diameter of the section where the clutch slide guide groove II is located; The bottom surface of the lever is provided with a protrusion II, and the protrusion II is located on the side of the hinge point opposite to the lever head; the clutch sleeve is provided with a groove II, and the protrusion II cooperates with the groove II, so that the lever is moved to move the clutch sleeve at the same time. When the stroller is rocking, the clutch sleeve moves away from the drive gear, and the guide boss disengages from the guide groove II. When the stroller is in a horizontal position, the guide boss engages with the guide groove II.

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