Wheel suspension structure and child carrier

Abstract

The application discloses a wheel shock-absorbing structure, which comprises an axle and a wheel seat used for being pivotally connected with a vehicle frame, the lower end of the wheel seat is used for being rotationally connected with a wheel through the axle, and the wheel shock-absorbing structure further comprises a shock-absorbing piece in an elastic structure, the upper end of the shock-absorbing piece is detachably connected with the upper end of the wheel seat, the shock-absorbing piece can rotate synchronously with the wheel seat, the lower end of the shock-absorbing piece is rotationally connected with the axle, the axle is slidably connected with the lower end of the wheel seat, the sliding of the axle drives the shock-absorbing piece to produce a recoverable elastic deformation, and the shock-absorbing piece provides shock absorption and buffering through the deformation. The application adopts the bending deformation of the shock-absorbing piece in the elastic structure and with a long effective shock-absorbing stroke to ensure that the wheel shock-absorbing structure has a better shock-absorbing effect. In addition, the application further discloses a child carrier with the wheel shock-absorbing structure.

Description

Technical Field

[0001] This invention relates to the field of children's vehicles, and more particularly to a wheel shock absorption structure for children's vehicles. Background Technology

[0002] Today, there are various types of child vehicles, among which wheeled child vehicles are particularly popular because they can reduce the burden on adults by replacing hand-carrying. It is well known that wheeled child vehicles inevitably encounter uneven terrain during travel, causing them to bounce and sway, thus affecting their safety and comfort. Therefore, existing child vehicles typically have shock-absorbing structures installed between the wheels and the wheel wells to ensure comfort. However, the shock-absorbing travel of these existing structures is relatively short, significantly impacting the shock absorption effect. When traveling on uneven surfaces, the wheels experience substantial impact forces from the ground. Even with maximum shock absorption, some force is still transmitted to the frame, affecting the safety and comfort of the child vehicle. Of course, some manufacturers have complex shock-absorbing structures between the wheel seat and the wheel to achieve a stronger shock absorption effect. However, the use of such shock-absorbing structures significantly increases the manufacturing cost of children's vehicles, and the stronger shock absorption effect also hinders the normal movement of children's vehicles to some extent.

[0003] Therefore, there is an urgent need for a wheel shock absorption structure that is simple in structure and has a better shock absorption effect. Summary of the Invention

[0004] The purpose of this invention is to provide a wheel shock absorption structure that achieves better shock absorption effect through a longer shock absorption stroke, thereby improving the safety and comfort of children's vehicles.

[0005] Another object of the present invention is to provide a child vehicle having a wheel shock absorption structure, which enables the child vehicle to have a better shock absorption effect.

[0006] To achieve the above objectives, the present invention provides a wheel shock absorption structure, including an axle and a wheel seat for pivotal connection with a vehicle frame. The lower end of the wheel seat is rotatably connected to the wheel via the axle. The invention also includes a shock absorber with an elastic structure. The upper end of the shock absorber is detachably connected to the upper end of the wheel seat, and the shock absorber can rotate synchronously with the wheel seat.

[0007] Compared with the prior art, the wheel shock absorption structure of the present invention includes a shock absorber with an elastic structure. The upper end of the shock absorber is detachably connected to the upper end of the wheel seat, and the shock absorber can rotate synchronously with the wheel seat. The lower end of the shock absorber is slidably connected to the lower end of the wheel seat through a wheel axle. When a child vehicle with this wheel shock absorption structure encounters an uneven road surface during forward movement, the wheel will slide relative to the wheel seat and adaptively adjust to a state that adapts to the uneven road surface due to the impact caused by the unevenness of the ground. Moreover, when the wheel passes over an uneven road surface, in addition to sliding relative to the wheel seat, the wheel will also deflect at a certain angle, thereby driving the wheel axle to slide and causing the upper and lower ends of the shock absorber to deflect synchronously in the same direction and angle. At the same time, due to the sliding of the wheel axle, the distance between the upper and lower ends of the shock absorber gradually shortens, so the entire shock absorber undergoes bending deformation. This recoverable bending deformation provides shock absorption and cushioning for the wheel, achieving a shock absorption effect and thereby improving the safety of the child vehicle. The invention offers superior shock absorption performance and comfort. Furthermore, existing shock absorbers often utilize coil springs. While the stretching or compressing deformation of coil springs can achieve significant shock absorption, the limited shock absorption stroke reduces the adaptive sensitivity to uneven road surfaces, hindering the normal movement of the child vehicle to some extent. In contrast, the shock absorber of this invention extends its shock absorption stroke throughout the entire wheel seat, employing the bending deformation of an elastic shock absorber to achieve shock absorption. Due to its longer effective shock absorption stroke, the undulations of uneven road surfaces are promptly and sensitively reflected in the bending deformation of the shock absorber, thus providing a superior shock absorption effect. This effect ensures both the safety and comfort of the child vehicle without affecting its normal movement. This invention departs from the traditional method of using coil springs for shock absorption, proposing instead a longer effective shock absorption stroke and the bending deformation of an elastic shock absorber to achieve a superior shock absorption effect. The structure is simple and practical, suitable for widespread application.

[0008] Preferably, the lower end of the shock absorber of the present invention is rotatably connected to the axle, and the axle is slidably connected to the lower end of the wheel seat. The sliding of the axle causes the shock absorber to produce a recoverable elastic deformation, thereby providing shock absorption and cushioning through the deformation of the shock absorber.

[0009] Preferably, the sliding of the wheel axle of the present invention causes the shock absorber to produce a recoverable elastic bending deformation, which provides shock absorption and cushioning; the recoverable bending deformation can provide better shock absorption effect, which can ensure the safety and comfort of the child vehicle without affecting the normal movement of the child vehicle.

[0010] Preferably, the shock absorber of the present invention has a bent structure; the bent structure is conducive to the bending deformation of the shock absorber, thereby achieving shock absorption and buffering.

[0011] Preferably, the shock absorber of the present invention has a strip-shaped bent structure; specifically, the shock absorber of the present invention is formed by bending a strip; specifically, the shock absorber may be formed by bending a strip made of thermoplastic elastomer or rubber material.

[0012] Preferably, the present invention further includes a mounting base for being rotatably connected to the vehicle frame, the upper end of the wheel seat being connected to the mounting base, and the rotation of the mounting base synchronously driving the wheel seat and the shock absorber to rotate; the synchronous rotation of the mounting base driving the wheel seat and the shock absorber to rotate can ensure that the upper and lower ends of the shock absorber deflect in the same direction and at the same angle.

[0013] Preferably, the shock absorber of the present invention includes a connecting portion that is snapped onto the mounting base, the connecting portion having an open snap ring structure.

[0014] Preferably, the mounting base of the present invention has a groove that mates with the retaining ring structure, and the retaining ring structure is engaged with the mounting base by means of the groove; the groove engagement can quickly realize the connection and disassembly between the shock absorber and the mounting base.

[0015] Preferably, the connecting portion of the present invention bends and extends toward the wheel axle to form a cantilever portion, and the lower end of the cantilever portion is rotatably connected to the wheel axle; the shock absorber in the wheel shock absorption structure provides shock absorption and cushioning for the wheel through the bending deformation of the cantilever portion.

[0016] Preferably, the bent portion of the cantilever portion of the present invention is clamped to the mounting base.

[0017] Preferably, the mounting base of the present invention protrudes to a positioning protrusion for the bend of the cantilever portion to engage with it; the engagement of the bend with the positioning protrusion enables the shock absorber to be effectively positioned on the mounting base, and allows the cantilever portion to undergo sensitive bending deformation to provide shock absorption.

[0018] Preferably, the direction of the opening in the snap ring structure of the present invention is opposite to the direction of the notch formed at the bend of the cantilever portion.

[0019] Preferably, the plane containing the retaining ring structure of the present invention is orthogonal to the plane containing the cantilever portion; this arrangement allows the shock absorber to be effectively positioned on the mounting base.

[0020] Preferably, the lower end of the cantilever portion of the present invention is curled to form a positioning ring for the axle to be inserted; the cantilever portion is slidably fitted onto the axle by means of the positioning ring.

[0021] Preferably, the upper end of the wheel seat of the present invention partially encloses the mounting base, and the upper end of the shock absorber is clamped between the wheel seat and the mounting base; the partial enclosure of the wheel seat can ensure the stability of the shock absorber clamped between the wheel seat and the mounting base.

[0022] Preferably, the upper end of the wheel seat of the present invention protrudes to provide a locking protrusion for the bending portion of the cantilever to bear the load; the locking protrusion can ensure the stability of the shock absorber during use.

[0023] Preferably, the lower end of the wheel seat of the present invention is provided with an oblong hole for the wheel axle to slide; the wheel axle can slide through the oblong hole and drive the shock absorber to slide synchronously in the same direction.

[0024] Specifically, the waist-shaped hole of the present invention is inclined relative to the wheel seat; the wheel axle slides on the inclined waist-shaped hole, which can shorten the distance between the upper and lower ends of the shock absorber, thereby causing the shock absorber to bend and deform to achieve a better shock absorption effect.

[0025] The child vehicle provided by the present invention includes a frame and wheels mounted on the frame, and also includes a wheel shock absorption structure as mentioned above connecting the frame and the wheels. The upper end of the wheel seat of the wheel shock absorption structure is pivotally connected to the frame, and the lower end of the wheel and the wheel seat are slidably connected through a wheel axle.

[0026] Compared with the prior art, the child vehicle of the present invention includes a wheel shock-absorbing structure with better shock absorption effect. When the child vehicle equipped with this wheel shock-absorbing structure encounters uneven ground during travel, the wheel, due to the impact caused by the uneven ground, will slide relative to the wheel seat and adaptively adjust to a state that adapts to the uneven road surface. Moreover, when the wheel passes over the uneven road surface, in addition to sliding relative to the wheel seat, the wheel will also deflect at a certain angle, thereby driving the axle to slide and causing the upper and lower ends of the shock absorber to deflect synchronously in the same direction and angle. At the same time, due to the sliding of the axle, the distance between the upper and lower ends of the shock absorber gradually shortens, so the entire shock absorber undergoes bending deformation. This recoverable bending deformation provides shock absorption and cushioning for the wheel, achieving a shock absorption effect, thereby improving the safety and comfort performance of the child vehicle. In addition, the shock absorbers in the prior art of child vehicles often use coil springs, although... While the stretching or compression deformation of a coil spring can achieve a significant shock absorption effect, a small shock absorption stroke reduces the adaptive sensitivity to uneven road surfaces, hindering the normal movement of the child vehicle to some extent. In contrast, the shock absorber in this invention extends its stroke throughout the entire wheel seat, and utilizes the bending deformation of an elastic shock absorber to achieve shock absorption. Due to its long effective shock absorption stroke, the undulations of uneven road surfaces are promptly and sensitively reflected in the bending deformation of the shock absorber, thus providing a superior shock absorption effect. This effect ensures both the safety and comfort of the child vehicle without affecting its normal movement. Therefore, this invention employs the bending deformation of an elastic shock absorber with a long effective shock absorption stroke to ensure a superior shock absorption effect on the wheel shock absorption structure of the child vehicle. Furthermore, the child vehicle of this invention is simple and practical, suitable for widespread use.

[0027] Preferably, the frame of the present invention is a child's bed frame or a child's stroller frame. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the child vehicle with wheel shock absorption structure of the present invention.

[0029] Figure 2 This is a schematic diagram of the wheel shock absorption structure of the present invention.

[0030] Figure 3 yes Figure 2 A schematic diagram of the disassembled structure after the wheels have been removed.

[0031] Figure 4 This is a schematic diagram of the shock absorber component of the wheel shock absorber structure of the present invention.

[0032] Figure 5 This is a schematic diagram of the mounting base for the wheel shock absorber structure of the present invention. Detailed Implementation

[0033] To illustrate the technical content, structural features, and effects of the present invention in detail, the following description is provided in conjunction with specific embodiments and accompanying drawings.

[0034] Please refer to Figure 1The child vehicle 100 of the present invention includes a frame 11 and wheels 12 mounted on the frame 11, and also includes a wheel shock absorber structure 13 connecting the frame 11 and the wheels 12. The upper end of the wheel seat 131 of the wheel shock absorber structure 13 is pivotally connected to the frame 11, and the lower end of the wheel 12 and the wheel seat 131 are slidably connected through a wheel axle 132. Specifically, the frame 11 in the present invention can be a child bed frame or a child stroller frame. When the child vehicle 100 equipped with the wheel shock absorber structure 13 encounters an uneven road surface during travel, the wheels 12 are subjected to shock from... The impact caused by the unevenness of the ground causes the wheel 12 to slide relative to the wheel seat 131 and adaptively adjust to the uneven road surface. Furthermore, when the wheel 12 passes over the uneven road surface, in addition to sliding relative to the wheel seat 131, it also deflects at a certain angle, which in turn drives the axle 132 to slide and causes the upper and lower ends of the shock absorber 133 to deflect synchronously in the same direction and angle. Simultaneously, due to the sliding of the axle 132, the distance between the upper and lower ends of the shock absorber 133 gradually shortens, thus causing the shock absorber to extend along the entire length of the wheel seat 131. The upward-facing shock absorber 133 undergoes bending deformation, and this recoverable bending deformation provides shock absorption and cushioning for the wheel 12, thereby improving the safety and comfort of the child vehicle 100. Compared with the shock absorbers in existing child vehicles that often use the tension or compression deformation of coil springs to achieve shock absorption, the shock absorber 133 on the child vehicle 100 of this invention has a shock absorption stroke that extends through the entire wheel seat 131 supporting the wheel 12, and uses the bending deformation of the elastic shock absorber 133 to achieve the shock absorption function. Due to its longer effective shock absorption stroke, the shock absorption effect is significantly enhanced. This allows the uneven road surface undulations to be promptly and sensitively reflected in the bending deformation of the shock absorber 133, thus providing a better shock absorption effect. This shock absorption effect ensures both the safety and comfort of the child vehicle 100 without affecting its normal movement. Therefore, the present invention uses the bending deformation of the shock absorber 133, which has a long effective shock absorption stroke and an elastic structure, to ensure that the wheel shock absorption structure 13 on the child vehicle 100 has a better shock absorption effect. At the same time, the child vehicle 100 of the present invention has a simple and practical structure, and is suitable for widespread use.

[0035] refer to Figure 2 The wheel shock absorber structure 13 of the present invention includes an axle 132, a wheel seat 131 for pivotal connection with the vehicle frame, and an elastic shock absorber 133; to more clearly illustrate the wheel shock absorber structure 13 of the present invention, the following is provided: Figure 2 The wheel shock absorber structure 13 is disassembled, and the exploded view of the wheel shock absorber structure 13 after removing the wheel 12 is shown below. Figure 3As shown, specifically, the wheel shock absorber structure 13 of the present invention also includes a mounting base 134. The upper end of the mounting base 134 is rotatably connected to the frame 11 of the child vehicle 100. The upper end of the wheel seat 131 is connected to the lower end of the mounting base 134, and the upper end of the wheel seat 131 is connected to the upper end of the shock absorber 133. At the same time, the wheel axle 132 is slidably connected to the lower end of the wheel seat 131, and the lower end of the wheel seat 131 and the lower end of the shock absorber 133 are rotatably connected through the wheel axle 132. The shock absorber 133 can rotate synchronously with the wheel seat 131. Therefore, the rotation of the mounting base 134 can drive the wheel seat 131 and the shock absorber 133 to rotate synchronously. This synchronous rotation can ensure that the upper and lower ends of the shock absorber 133 deflect in the same direction and at the same angle, effectively avoiding the twisting of the shock absorber 133 due to the deflection of the wheel 12, and ensuring the normal steering of the wheel 12. When the wheel 12 travels on an uneven road surface, the wheel 12 is impacted by the unevenness of the ground, causing the axle 132 to slide relative to the wheel seat 131. The sliding of the axle 132 causes the wheel 12 to adaptively adjust to the uneven road surface. The adaptive adjustment of the wheel 12 causes the distance between the upper and lower ends of the shock absorber 133 to gradually shorten, resulting in the bending deformation of the shock absorber 133 running through the entire length of the wheel seat 131. This bending deformation effectively provides shock absorption and cushioning for the wheel 12, achieving a better shock absorption effect, thereby improving the safety and comfort performance of the child vehicle 100. Therefore, the wheel shock absorption structure 13 of the present invention effectively ensures the safety, comfort, and normal travel of the child vehicle 100, while also providing a better shock absorption effect.

[0036] The shock absorber 133 of the wheel shock absorber structure 13 of the present invention has a bent structure, and is a strip-shaped bent structure. This bent structure is conducive to the bending deformation of the shock absorber 133, thereby achieving shock absorption and buffering. Specifically, it can be formed by bending a strip, which can be made of thermoplastic elastomer or rubber material; combined with Figures 3-5 The shock absorber 133 of the present invention will be described in further detail.

[0037] refer to Figures 3-5The shock absorber 133 of the present invention includes a connecting portion 1331 that is engaged with a mounting base 134. The connecting portion 1331 has an open retaining ring structure. The mounting base 134 has a groove 1341 that mates with the retaining ring structure of the connecting portion 1331. The connecting portion 1331 is engaged with the mounting base 134 through the groove 1341. The groove 1341 allows for quick connection and disassembly between the shock absorber 133 and the mounting base 134. Furthermore, the connecting portion 1331 of the shock absorber 133 of the present invention is bent toward the axle 132. The cantilever portion 1332 is extended to form a lower end of the cantilever portion 1332, which is coiled to form a positioning ring 1333 for the axle 132 to insert into. The positioning ring 1333 is rotatably fitted onto the axle 132. The sliding of the axle 132 causes the positioning ring 1333 to slide synchronously, thereby causing the cantilever portion 1332 to bend and deform, thus achieving a shock absorption and buffering effect. Specifically, in order to effectively position the shock absorber 133 on the mounting base 134, the mounting base 134 protrudes a positioning protrusion 1342 for the bend of the cantilever portion 1332 to engage with. The bend 1334 is clamped onto the mounting base 134 by the positioning protrusion 1342; at the same time, in this invention, the direction of the opening 1331a of the retaining ring structure of the connecting part 1331 is opposite to the direction of the notch 1334a formed by the bend 1334 of the cantilever part 1332, and the plane of the retaining ring structure of the connecting part 1331 is orthogonal to the plane of the cantilever part 1332. Since the opening 1331a and the notch 1334a are opposite in direction and the plane of the retaining ring structure is orthogonal to the plane of the cantilever part 1332, thus avoiding The shock absorber 133 can be effectively positioned on the mounting base 134, and the cantilever portion 1332 can be flexibly bent and deformed to provide shock absorption when subjected to force from the wheel axle 132. More specifically, the upper end of the wheel seat 131 is partially enclosed on the mounting base 134, and the upper end of the wheel seat 131 is also provided with a protruding locking protrusion 1312 for the bending portion 1334 of the cantilever portion 1332 to bear the load. The upper end of the shock absorber 133 is precisely clamped between the wheel seat 131 and the mounting base 134. This arrangement can ensure the stability of the shock absorber 133 in use.

[0038] Continue to refer to Figure 3 In order to enable the axle 132 to slide and drive the shock absorber 133 to bend, the lower end of the wheel seat 131 of the present invention is provided with a waist-shaped hole 1311 for the axle 132 to slide, and the waist-shaped hole 1311 is inclined relative to the wheel seat 131. When the wheel 12 is impacted from the ground and moves upward relative to the wheel seat 131, the axle 132 slides on the inclined waist-shaped hole 1311, which can shorten the distance between the upper and lower ends of the shock absorber 133, thereby causing the shock absorber 133 to bend and deform to achieve a better shock absorption effect.

[0039] refer to Figure 3 and Figure 5It is worth noting that the shock absorber 133 in the wheel shock absorber structure 13 of the present invention can be detachably configured. Specifically, mounting holes 1313 are provided at the upper end of the wheel seat 131 and at the corresponding positions of the mounting base 134. The upper end of the wheel seat 131 can be disassembled by rotating the pin, thereby disassembling the upper end of the shock absorber 133. Similarly, the wheel axle 132 can be a detachable bolt to disassemble the lower end of the wheel seat 131 from the lower end of the shock absorber 133. When the shock absorber 133 ages or wears as the service time increases, the shock absorber 133 can be replaced quickly and conveniently. This detachable configuration is well known to those skilled in the art.

[0040] It is worth noting that the specific structure and function of the frame 11 involved in this invention are known to those skilled in the art, and will not be described in detail here.

[0041] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A wheel shock absorption structure, comprising an axle and a wheel seat for pivotal connection with a vehicle frame, wherein the lower end of the wheel seat is rotatably connected to a wheel via the axle, wherein, The wheel shock absorption structure also includes a shock absorber with an elastic structure. The upper end of the shock absorber is connected to the upper end of the wheel seat, and the wheel axle is slidably connected to the lower end of the wheel seat. The shock absorber can rotate synchronously with the wheel seat, and the shock absorption stroke of the shock absorber extends through the wheel seat. The lower end of the shock absorber is rotatably connected to the axle. The sliding of the axle causes the shock absorber to undergo a recoverable, elastic deformation, which provides shock absorption and cushioning. The sliding of the axle causes the shock absorber to undergo a recoverable, elastic bending deformation, which provides shock absorption and cushioning. The wheel shock absorber structure further includes a mounting base for rotatably connecting to the vehicle frame. The upper end of the wheel seat is connected to the mounting base. The rotation of the mounting base synchronously drives the wheel seat and the shock absorber to rotate. The shock absorber includes a connecting part that is snapped onto the mounting base. The connecting part is a snap ring structure with an opening. The mounting base has a groove that cooperates with the snap ring structure. The snap ring structure is snapped onto the mounting base by means of the groove.

2. The wheel shock absorption structure as described in claim 1, characterized in that, The shock absorber has a bent structure.

3. The wheel shock absorption structure as described in claim 2, characterized in that, The shock absorber is formed by bending a strip.

4. The wheel shock absorption structure as described in claim 1, characterized in that, The connecting part bends and extends toward the wheel axle to form a cantilever, and the lower end of the cantilever is rotatably connected to the wheel axle.

5. The wheel shock absorption structure as described in claim 4, characterized in that, The bent portion of the cantilever is clamped to the mounting base.

6. The wheel shock absorption structure as described in claim 5, characterized in that, The mounting base protrudes to form a positioning protrusion that is engaged with the bend of the cantilever.

7. The wheel shock absorption structure as described in claim 4, characterized in that, The opening direction of the retaining ring structure is opposite to the direction of the notch formed at the bend of the cantilever.

8. The wheel shock absorption structure as described in claim 4, characterized in that, The plane containing the retaining ring structure is orthogonal to the plane containing the cantilever.

9. The wheel shock absorption structure as described in claim 4, characterized in that, The lower end of the cantilever is curled to form a positioning ring for the axle to be inserted.

10. The wheel shock absorption structure as described in claim 1, characterized in that, The upper end of the wheel seat partially hugs the mounting base, and the upper end of the shock absorber is clamped between the wheel seat and the mounting base.

11. The wheel shock absorption structure as described in claim 4, characterized in that, The upper end of the wheel seat protrudes to provide support for the bend in the cantilever section.

12. The wheel shock absorption structure as described in claim 1, characterized in that, The lower end of the wheel seat has a waist-shaped hole for the wheel axle to slide.

13. The wheel shock absorption structure as described in claim 12, characterized in that, The waist-shaped hole is inclined relative to the wheel seat.

14. A child vehicle comprising a frame and wheels mounted on the frame, wherein, The child vehicle further includes a wheel shock absorption structure as described in any one of claims 1-13, connected between the frame and the wheel, wherein the upper end of the wheel seat of the wheel shock absorption structure is pivotally connected to the frame, and the wheel and the lower end of the wheel seat are slidably connected via the wheel axle.

15. The child vehicle as claimed in claim 14, characterized in that, The frame is a children's bed frame or a children's stroller frame.

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