Baby stroller wheel brake mechanism

Abstract

The present invention discloses a braking mechanism for a baby carriage wheel. The wheel is rotatably mounted on a wheel bracket. A brake internal gear ring is coaxially fixed on the wheel. A brake block is slidably mounted on the wheel bracket along the radial direction of the wheel. One end of the brake block is provided with a locking tooth extending along the axial direction of the wheel. The locking tooth is inserted into the brake internal gear ring and can be engaged and clamped with the brake internal gear ring. An elastic member provides an elastic force for the brake block to keep the locking tooth engaged and clamped with the brake internal gear ring. A brake guide rod is slidably mounted on the wheel bracket. One end of the brake guide rod abuts against the other end of the brake block. When the brake guide rod slides, it can press the brake block to slide along the radial direction of the wheel against the elastic force of the elastic member. A switch is mounted on the wheel bracket. The switch can drive the brake guide rod to slide reciprocally. The structure of the present invention is simple. By using one switch, the brakes of two wheels can be simultaneously applied or released, which is convenient to operate and has stable braking, avoiding the occurrence of brake failure.

Description

Technical Field

[0001] The present invention relates to a baby stroller, and particularly to a wheel braking mechanism for a baby stroller. Background Art

[0002] Baby strollers are currently very popular among parents. When traveling, the baby can be placed on the stroller and pushed, which saves effort and is convenient for traveling. Currently, the wheel braking structures of baby strollers are mostly achieved by friction, that is, eccentric friction plates are provided on the wheel seats. When braking, it is necessary to step on the eccentric friction plates on two wheels respectively to achieve wheel braking. On the one hand, the eccentric friction plates are easily worn after long-term use, resulting in brake failure. On the other hand, it is necessary to brake the two wheels separately, which is inconvenient to operate and prone to the situation that the baby stroller brakes unstably due to only braking one wheel. Summary of the Invention

[0003] In order to overcome the above defects, the present invention provides a wheel braking mechanism for a baby stroller, which has a simple structure, convenient braking operation and stable braking.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a wheel braking mechanism for a baby stroller, including a wheel, a wheel bracket, a brake block, a brake guide rod, an elastic member and a switch. The wheel is rotatably installed on the wheel bracket, and a brake internal gear ring is coaxially fixed on the wheel. The brake block is slidably installed on the wheel bracket along the radial direction of the wheel. One end of the brake block is provided with a tooth that extends along the axial direction of the wheel. The tooth is inserted into the brake internal gear ring and can be engaged and clamped with the brake internal gear ring. The elastic member provides an elastic force for the brake block to keep the tooth engaged and clamped with the brake internal gear ring. The brake guide rod is slidably installed on the wheel bracket. One end of the brake guide rod abuts against the other end of the brake block, and the sliding of the brake guide rod can press the brake block to slide along the radial direction of the wheel against the elastic force of the elastic member. The switch is installed on the wheel bracket, and the switch can drive the brake guide rod to slide back and forth.

[0005] As a further improvement of the present invention, a connecting rod is also provided. The two wheel brackets are arranged in parallel at intervals, and both ends of the connecting rod are fixedly connected to the two wheel brackets respectively. The switch is installed on the connecting rod, and the switch can drive the brake guide rods on the two wheel brackets to slide back and forth simultaneously.

[0006] As a further improvement of the present invention, the connecting rod is a tubular structure. The wheel bracket is provided with a slideway for the brake guide rod to slide. The inner side of the connecting rod intersects and communicates with the slideway on the wheel bracket. Two brake driving rods are slidably arranged in the connecting rod. The two brake driving rods are in contact with the brake guide rods in the slideways of the wheel brackets at both ends of the connecting rod through inclined surfaces respectively. The switch on the connecting rod drives the two brake driving rods to move synchronously and in opposite directions.

[0007] As a further improvement of the present invention, a strip-shaped groove structure extending along its axial direction is provided on the side wall of the brake guide rod, and a radial protrusion structure is fixedly provided on the side wall of the connecting rod. The radial protrusion structure can be slidably inserted into the strip-shaped groove structure on the side wall of the brake guide rod.

[0008] As a further improvement of the present invention, the wheel bracket includes a wheel seat, a wheel seat joint and a front fork. A hollow rotating shaft is provided on the wheel seat joint. The hollow rotating shaft is axially stopped and circumferentially rotatable and inserted into the wheel seat. The brake guide rod can be axially slidably inserted into the hollow rotating shaft of the wheel seat joint. The upper end of the front fork is mounted on the wheel seat. The wheel can be rotatably mounted between two inserts of the front fork. The brake block can be slidably mounted on the side wall of the front fork by a set distance. The other end of the brake block forms a retaining wall extending along the axial direction of the wheel. The retaining wall extends into the space between the two inserts of the front fork. One end of the brake guide rod abuts against the upper side surface of the retaining wall at the other end of the brake block.

[0009] As a further improvement of the present invention, a connecting wall is provided between the two inserts of the front fork. A channel for inserting the retaining wall of the brake block is formed in the connecting wall. An avoidance hole communicating with the hollow rotating shaft of the wheel seat joint is also provided on the upper side wall of the connecting wall. One end of the brake guide rod is inserted into the channel of the connecting wall through the avoidance hole and abuts against the retaining wall at the other end of the brake block.

[0010] As a further improvement of the present invention, the brake block is of an inverted U-shaped structure. The connecting wall is the bottom surface of the inverted U-shaped structure. The cogs are fixedly mounted on the side walls at both ends of the opening of the inverted U-shaped structure. Sliding grooves for sliding the two side walls of the inverted U-shaped structure of the brake block are formed on the side walls of the two inserts of the front fork.

[0011] As a further improvement of the present invention, guiding protrusions are also provided on the bottom surface of the sliding grooves on the side walls of the two inserts of the front fork. A sliding groove extending along its sliding direction is also provided on the side wall of the inverted U-shaped structure of the brake block. The guiding protrusions can be relatively slidably inserted into the sliding grooves described above.

[0012] As a further improvement of the present invention, a round hole and an arc-shaped hole concentric with the round hole are provided on the wheel seat joint. Two mounting holes corresponding to the round hole and the arc-shaped hole are formed at the upper end of the front fork. The two mounting holes at the upper end of the front fork are connected to the round hole and the arc-shaped hole through connecting pieces. A buffer elastic member is also provided between the wheel seat joint and the front fork.

[0013] As a further improvement of the present invention, elastic member insertion grooves are respectively formed on the wheel seat joint and the front fork. Both ends of the buffer elastic member are respectively tightly inserted into the elastic member insertion grooves.

[0014] The beneficial effects of the present invention are as follows: By sliding the brake guide rod to press against the brake block, the brake block overcomes the elastic force to disengage the upper engaging teeth thereof from the internal gear ring on the wheel, enabling the wheel to rotate freely. When the brake guide rod moves in the reverse direction, the brake block loses the pressing action of the brake guide rod and resets under the elastic force of the elastic member to engage with the gear to achieve the braking action. This braking structure is simple. Moreover, through a switch to link two brake guide rods to drive the brake blocks on two wheels respectively, one operation can achieve simultaneous braking or cancellation of braking for the two wheels, which is convenient to operate and can avoid the situation of forgetting to brake one wheel. The baby carriage brake is stable, and the braking is achieved through the structure of the internal gear ring meshing with the engaging teeth, avoiding the wear of the friction plate and the occurrence of brake failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view of the present invention;

[0016] Figure 2 is a first exploded view of the present invention;

[0017] Figure 3 is a second exploded view of the present invention;

[0018] Figure 4 is a front view of the wheel part of the present invention;

[0019] Figure 5 is Figure 4 a sectional view taken along the line A-A in

[0020] Figure 6 is a schematic diagram of the switch synchronous drive two-wheel brake structure of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Embodiment: An infant stroller wheel braking mechanism includes a wheel 1, a wheel bracket, a brake block 2, a brake guide rod 3, an elastic member 4, and a switch 21. The wheel 1 is rotatably mounted on the wheel bracket. A brake internal gear ring 5 is coaxially fixed on the wheel 1. The brake block 2 is slidably mounted on the wheel bracket along the radial direction of the wheel 1. One end of the brake block 2 is provided with a tooth 6 extending along the axial direction of the wheel 1. The tooth 6 is inserted into the brake internal gear ring 5 and can be engaged and clamped with the brake internal gear ring 5. The elastic member 4 provides an elastic force for the brake block 2 to keep the tooth 6 engaged and clamped with the brake internal gear ring 5. The brake guide rod 3 is slidably mounted on the wheel bracket. One end of the brake guide rod 3 abuts against the other end of the brake block 2, and the sliding of the brake guide rod 3 can press the brake block 2 to slide radially along the wheel 1 against the elastic force of the elastic member 4. The switch 21 is mounted on the wheel bracket, and the switch 21 can drive the brake guide rod 3 to slide reciprocally. In the normal state, the brake block 2 is kept in a state of being engaged and clamped with the internal gear ring on the wheel 1 under the action of the elastic member 4. When it is necessary to push the infant stroller, only need to operate the switch 21 once. The switch 21 drives the brake guide rod 3 to press down the brake block 2, so that the brake block 2 slides radially along the wheel 1 against the elastic force. The tooth 6 on the brake block 2 disengages from the internal gear ring of the wheel 1. At this time, the wheel 1 can rotate freely. This structure is simple. The braking of the wheel 1 is realized through the meshing structure of the tooth 6. The braking is firm and stable, avoiding the situation of brake failure during long-term use.

[0022] A connecting rod 7 is also provided. The two wheel brackets are arranged in parallel at intervals. Both ends of the connecting rod 7 are fixedly connected to the two wheel brackets respectively. The switch 21 is mounted on the connecting rod 7, and the switch 21 can drive the brake guide rods 3 on the two wheel brackets to slide reciprocally at the same time. By driving the braking guide rods on the two wheels 1 to move synchronously through one switch 21, the synchronous braking or synchronous cancellation of braking of the two wheels 1 is realized, avoiding the separate braking operations of the two wheels 1 and improving the braking efficiency.

[0023] The connecting rod 7 is a tubular structure. A slideway 16 for the brake guide rod 3 to slide is provided on the wheel bracket. The inner side of the connecting rod 7 intersects and communicates with the slideway 16 on the wheel bracket. Two brake guiding rods 8 that can slide are arranged inside the connecting rod 7. The two brake guiding rods 8 are respectively in inclined contact with the brake guide rods 3 in the slideways 16 of the wheel brackets at both ends of the connecting rod 7 through inclined surfaces. The switch 21 on the connecting rod 7 drives the two brake guiding rods 8 to move synchronously and in opposite directions. By driving the two brake guiding rods 8 to slide synchronously and in opposite directions through the switch 21, and then pressing the other end of the brake guide rod 3 through the inclined surface on the brake guiding rod 8, the synchronous sliding of the two brake guide rods 3 is realized to perform braking and release braking operations. The structure for driving the two brake guiding rods 8 to slide synchronously and in opposite directions by the switch 21 can be various structures. For example, the switch 21 is inserted vertically in the sliding direction of the brake guiding rod 8 and is a button structure, with symmetric inclined surfaces formed on both sides thereof. The two symmetric inclined surfaces are respectively in matching contact with the inclined surfaces on the brake guiding rod 8. By pressing the switch 21, the synchronous reverse driving of the two brake guiding rods 8 can be realized. The switch 21 can also be a knob. A gear is coaxially arranged on the knob, and racks are arranged on the two brake guiding rods 8. The two racks are respectively meshed with both sides of the gear. It can also be that two pull cords wound around the knob pull the two brake guiding rods 8, etc. These are equivalent replacement structures that can be easily thought of by those skilled in the art according to this patent and belong to the protection scope of this patent.

[0024] A long strip-shaped groove structure 9 extending along the axial direction thereof is provided on the side wall of the brake guiding rod 8. A radially protruding structure is fixedly arranged on the side wall of the connecting rod 7. The radially protruding structure can slide and be inserted into the long strip-shaped groove structure 9 on the side wall of the brake guiding rod 8. The sliding guiding of the brake guiding rod 8 is realized through the cooperation of the long strip-shaped groove structure 9 and the radially protruding structure. The guiding between the side wall of the connecting rod 7 and the brake guiding rod 8 can also be realized through the cooperation of a key and a keyway structure.

[0025] The wheel bracket includes a wheel seat 10, a wheel seat joint 11 and a front fork 12. A hollow rotating shaft 13 is provided on the wheel seat joint 11. The hollow rotating shaft 13 is axially stopped and can rotate circumferentially and is inserted into the wheel seat 10. The brake guide rod 3 can slide axially and is inserted into the hollow rotating shaft 13 of the wheel seat joint 11. The upper end of the front fork 12 is installed on the wheel seat 10. The wheel 1 can rotate and is installed between the two inserts of the front fork 12. The brake block 2 can slide a set distance and is installed on the side wall of the front fork 12. A stop wall 14 extending along the axial direction of the wheel 1 is formed at the other end of the brake block 2. The stop wall 14 extends into the space between the two inserts of the front fork 12. One end of the brake guide rod 3 abuts against the upper side surface of the stop wall 14 at the other end of the brake block 2. This structure realizes that while the wheel 1 rotates around its axle, the wheel seat joint 11 can rotate around the vertical axis on the wheel seat 10 to realize the steering of the baby carriage. External threads can be provided at the end of the hollow rotating shaft 13 on the wheel seat joint 11, and a nut is screwed on the external threads to realize the axial stop connection with the wheel seat 10.

[0026] A connecting wall 15 is provided between the two inserts of the front fork 12. A channel for inserting the retaining wall 14 of the brake block 2 is formed in the connecting wall 15. An avoidance hole communicating with the hollow rotating shaft 13 of the wheel seat joint 11 is also provided on the upper side wall of the connecting wall 15. One end of the brake guide rod 3 is inserted into the channel of the connecting wall 15 through the avoidance hole and abuts against the retaining wall 14 at the other end of the brake block 2. This structure can achieve the positioning and guiding of one end of the brake guide rod 3, as well as the accommodation, limitation and guiding of the retaining wall 14 on the brake block 2.

[0027] The brake block 2 has an inverted U-shaped structure, and the connecting wall 15 is the bottom surface of the inverted U-shaped structure. The teeth 6 are fixedly installed on the side walls at both ends of the opening of the inverted U-shaped structure. Sliding grooves 16 for the side walls of the inverted U-shaped structure of the brake block 2 to slide are formed on the side walls of the two inserts of the front fork 12. For the convenience of assembly, the bottom surface of the U-shaped structure can be a split plug-in structure. The brake block 2 is symmetrically arranged in an inverted U-shaped structure, which can improve the braking stability and avoid jamming with the wheel 1.

[0028] Guide protrusions 17 are also provided on the bottom surface of the sliding grooves 16 on the side walls of the two inserts of the front fork 12, and sliding grooves extending along its sliding direction are also provided on the side walls of the inverted U-shaped structure of the brake block 2. The guide protrusions 17 can be relatively slidably inserted into the aforementioned sliding grooves. The cooperation between the guide protrusions 17 and the sliding grooves realizes the guiding of the brake block 2 and the limitation of the sliding distance.

[0029] A round hole 18 and an arc hole 19 concentric with the round hole 18 are provided on the wheel seat joint 11. Two mounting holes opposite to the round hole 18 and the arc hole 19 are formed at the upper end of the front fork 12. The two mounting holes at the upper end of the front fork 12 are connected to the round hole 18 and the arc hole 19 through connecting pieces. A buffer elastic member 4 is also provided between the wheel seat joint 11 and the front fork 12. This structure can achieve elastic relative rotation between the front fork 12 and the wheel seat joint 11 within a certain range, realize the buffering of the vibration of the wheel 1, and improve the comfort of the baby's ride.

[0030] Elastic member insertion grooves 20 are respectively formed on the wheel seat joint 11 and the front fork 12, and both ends of the buffer elastic member 4 are respectively tightly inserted into the elastic member insertion grooves 20.

Claims

1. A braking mechanism for a baby carriage wheel, characterized in that: It includes a wheel (1), a wheel bracket, a brake block (2), a brake guide rod (3), an elastic member (4) and a switch (21). The wheel is rotatably mounted on the wheel bracket. A brake internal gear ring (5) is coaxially fixed on the wheel. The brake block is slidably mounted on the wheel bracket along the radial direction of the wheel. A tooth (6) extending along the axial direction of the wheel is provided at one end of the brake block. The tooth is inserted into the brake internal gear ring and can be engaged and clamped with the brake internal gear ring. The elastic member provides an elastic force for the brake block to keep the tooth engaged and clamped with the brake internal gear ring. The brake guide rod is slidably mounted on the wheel bracket. One end of the brake guide rod abuts against the other end of the brake block. And the sliding of the brake guide rod can press the brake block to slide along the radial direction of the wheel against the elastic force of the elastic member. The switch can drive the brake guide rod to slide reciprocally. The wheel bracket includes a wheel seat (10), a wheel seat joint (11) and a front fork (12). A hollow rotating shaft (13) is provided on the wheel seat joint. The hollow rotating shaft is axially stopped and rotatably inserted into the wheel seat in the circumferential direction. The brake guide rod is slidably inserted into the hollow rotating shaft of the wheel seat joint along the axial direction. The upper end of the front fork is mounted on the wheel seat. The wheel is rotatably mounted between two inserts of the front fork. The brake block is slidably mounted on the side wall of the front fork by a set distance. A retaining wall (14) extending along the axial direction of the wheel is formed at the other end of the brake block. The retaining wall extends into the space between the two inserts of the front fork. One end of the brake guide rod abuts against the upper side surface of the retaining wall at the other end of the brake block. A round hole (18) and an arc-shaped hole (19) concentric with the round hole are provided on the wheel seat joint. Two mounting holes opposite to the round hole and the arc-shaped hole are formed at the upper end of the front fork. The two mounting holes at the upper end of the front fork are connected to the round hole and the arc-shaped hole through connecting members. A buffer elastic member is further provided between the wheel seat joint and the front fork. A connecting rod (7) is also provided. The two wheel brackets are arranged in parallel at intervals. Both ends of the connecting rod are fixedly connected to the two wheel brackets respectively. The switch is mounted on the connecting rod. The switch can drive the brake guide rods on the two wheel brackets to slide reciprocally at the same time. The connecting rod is of a tubular structure. A slideway for the brake guide rod to slide is provided on the wheel bracket. The inner side of the connecting rod intersects and communicates with the slideway on the wheel bracket. Two brake driving rods (8) are slidably arranged in the connecting rod. The two brake driving rods are in contact with the brake guide rods in the slideways of the wheel brackets at both ends of the connecting rod through inclined surfaces respectively. The switch on the connecting rod drives the two brake driving rods to move synchronously and in opposite directions. A long groove structure (9) extending along the axial direction of the brake driving rod is provided on the side wall of the brake driving rod. A radial protrusion structure is fixedly provided on the side wall of the connecting rod. The radial protrusion structure can be slidably inserted into the long groove structure on the side wall of the brake driving rod.

2. The braking mechanism for a baby carriage wheel according to claim 1, characterized in that: A connecting wall (15) is provided between the two inserts of the front fork. A channel for inserting the retaining wall of the brake block is formed in the connecting wall. An avoidance hole communicating with the hollow rotating shaft of the wheel seat joint is further provided on the upper side wall of the connecting wall. One end of the brake guide rod is inserted into the channel of the connecting wall through the avoidance hole and abuts against the retaining wall at the other end of the brake block.

3. The braking mechanism for a baby carriage wheel according to claim 1, characterized in that: The brake block has an inverted U-shaped structure, the connecting wall is the bottom surface of the inverted U-shaped structure, the locking teeth are fixedly installed on both side walls at the open end of the inverted U-shaped structure, and sliding grooves (16) for the sliding of both side walls of the inverted U-shaped structure of the brake block are formed on the side walls of the two inserting pieces of the front fork.

4. The braking mechanism for a baby carriage wheel according to claim 3, characterized in that: Guide protrusions (17) are further provided on the bottom surfaces of the sliding grooves on the side walls of the two inserting pieces of the front fork, and sliding grooves extending along the sliding direction are further provided on the side walls of the inverted U-shaped structure of the brake block, and the guide protrusions can be inserted into the aforementioned sliding grooves in a relatively sliding manner.

5. The braking mechanism for a baby carriage wheel according to claim 1, characterized in that: Elastic member insertion grooves (20) are respectively formed on the wheel seat joint and the front fork, and both ends of the buffer elastic member are respectively tightly inserted into the elastic member insertion grooves.

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