A brake device

Abstract

The application relates to the technical field of brakes and discloses a brake device, which comprises a vehicle frame with a vehicle wheel, a first parking position and a second parking position, and a locking groove arranged on the vehicle wheel; a locking mechanism comprising a locking piece which can be lifted and lowered to be locked into or unlocked from the locking groove; a driving mechanism comprising a foot pedal, a push rod and a limiting turntable, the limiting turntable is movably arranged on the first parking position or the second parking position, and the foot pedal can be pressed downward to drive the limiting turntable to switch between the first parking position and the second parking position; the push rod is movably abutted with the limiting turntable, and the push rod can drive the locking piece to be locked into the locking groove; when the limiting turntable is parked at the first parking position, the locking piece is separated from the locking groove; and when the limiting turntable is parked at the second parking position, the locking piece is locked into the locking groove. The brake device has the advantages that the brake and the unbrake can be completed through the foot pedal, the vamp can be effectively prevented from being scratched or stained, and the brake device can be applied to the 360-degree rotatable vehicle wheel.

Description

Technical Field

[0001] This invention relates to the field of braking technology, and more particularly to a braking device. Background Technology

[0002] Equipping strollers with brakes allows them to stop and park. Existing brake systems typically involve pressing a foot pedal to engage a locking mechanism in the wheel's groove; to release the brake, the foot is pulled upwards to disengage the locking mechanism. However, this process can easily scratch or soil shoes.

[0003] On the other hand, existing braking devices of this type are generally designed for fixed wheels, while strollers often require wheels that can rotate 360 ​​degrees, and existing braking devices cannot effectively brake wheels that can rotate 360 ​​degrees. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by the present invention is to propose a braking device that can both brake and release the brake by stepping on a foot pedal and can be applied to 360-degree rotating wheels.

[0005] The technical solution adopted by the present invention to solve its technical problem is to propose a braking device, comprising:

[0006] A frame with wheels, the frame having a first parking position and a second parking position, and the wheels having a plurality of locking grooves;

[0007] A locking mechanism, mounted on the frame, includes a locking member that is movably and vertically mounted on the frame to lock into or unlock from the locking slot;

[0008] A drive mechanism, mounted on the frame, includes a foot pedal, a push rod, and a limiting turntable. The limiting turntable is movably disposed at the first parking position or the second parking position, and pressing down on the foot pedal can drive the limiting turntable to switch between the first parking position and the second parking position. The push rod moves against the limiting turntable and can drive the locking member to lock into the locking groove.

[0009] When the limiting turntable stops at the first stopping position, the locking member disengages from the locking groove; when the limiting turntable stops at the second stopping position, the locking member locks into the locking groove.

[0010] Furthermore, the vehicle frame has a limiting seat, and both the first parking position and the second parking position are disposed on the limiting seat;

[0011] The driving mechanism includes a pusher member, which is movably disposed on the limiting seat. The pusher member can push the limiting turntable to switch the limiting turntable between the first stopping position and the second stopping position.

[0012] Furthermore, the limiting turntable is provided with a plurality of first abutments along its circumference; the inner wall of the limiting seat is provided with a plurality of sliding grooves, and a plurality of first inclined walls near the sliding grooves;

[0013] When the limiting turntable is stopped at the second stopping position, the first abutment block abuts against the first inclined wall; when the limiting turntable is stopped at the first stopping position, the first abutment block is in the groove.

[0014] Furthermore, the groove is adjacent to the first inclined wall, and a limiting block protrudes from the first inclined wall. The first abutment can slide along the first inclined wall and abut against the limiting block.

[0015] Furthermore, the limiting block is provided with a second inclined wall, and the first abutment block can slide into the groove along the second inclined wall.

[0016] Furthermore, the pusher is provided with a plurality of sliders along its circumference, and the sliders are slidably disposed in the groove. When the first pusher is in the groove, the first pusher abuts against the slider.

[0017] Furthermore, the limiting turntable has four first abutments evenly distributed along its circumference, and the limiting turntable also has four second abutments evenly distributed along its circumference. There is a second abutment between two adjacent first abutments and a first abutment between two adjacent second abutments. The protrusion height of the first abutment is greater than the protrusion height of the second abutment. The number of the sliding grooves is four.

[0018] The first abutment block is provided with a third inclined wall, the second abutment block is provided with a fourth inclined wall, and the slider is provided with a fifth inclined wall. The third inclined wall can slide along the fifth inclined wall, and the fourth inclined wall can slide along the fifth inclined wall.

[0019] Furthermore, the frame includes a frame body and wheel seats, the wheels are mounted on the wheel seats, and the wheel seats are rotatable 360 ​​degrees relative to the frame body;

[0020] The locking mechanism further includes an upper abutment and a lower abutment. The upper abutment is disposed in the frame and abuts against the push rod. The lower abutment is disposed in the wheel seat and abuts against the upper abutment. The push rod can drive the locking member to move up and down through the upper abutment and the lower abutment.

[0021] Furthermore, the upper abutment is provided with a sixth inclined wall, and the push rod is provided with a seventh inclined wall, the sixth inclined wall being slidable along the seventh inclined wall;

[0022] The locking member is provided with a tension spring at the end away from the locking groove; the wheel seat is provided with an unlocking spring. When the limiting turntable switches from the second parking position to the first parking position, the unlocking spring can drive the locking member to disengage from the locking groove.

[0023] Furthermore, the drive mechanism includes a drive block, the foot pedal is hinged to the frame and movably abuts against the drive block; the drive block is vertically and vertically mounted on the frame and movably abuts against the pushing member;

[0024] The foot pedal is provided with a first return spring, the drive block is provided with a second return spring, and the push rod is provided with a third return spring.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] In this invention, a limiting turntable is incorporated into the drive mechanism. The locking and unlocking of the locking components, i.e., the braking and de-braking of the braking device, are achieved by adjusting the position of the limiting turntable. When the limiting turntable is at the first stopping position, the braking device is in the de-braking state; when the limiting turntable is at the second stopping position, the braking device is in the braking state. Regardless of whether the limiting turntable switches from the first stopping position to the second stopping position or vice versa, this can be achieved by stepping on a foot pedal, eliminating the need to hook the foot pedal when de-braking, thus preventing scratches or dirt from being applied to the shoe surface. Each time the foot pedal is pressed down, the limiting turntable can only rotate in one direction (such as clockwise), realizing the switching between the braking and releasing states of the braking device. Four first abutment blocks and four second abutment blocks are evenly distributed along the circumference of the limiting turntable. Therefore, each time the limiting turntable rotates about 45 degrees, it can complete the switching between the braking and releasing states. Moreover, each time the switch is made, the fifth inclined wall on the slider pushes against the third or fourth inclined wall on the limiting turntable, ensuring that there will be no accidental braking or mis-braking.

[0027] In this invention, the wheel is mounted on a wheel seat. Since the wheel can rotate 360 ​​degrees along the frame, essentially functioning as a swivel wheel, the locking mechanism includes a separate upper and lower abutment arranged from top to bottom. The upper abutment is located in the frame, and the lower abutment is located in the wheel seat, ensuring that the 360-degree rotation of the wheel is not interfered with. Furthermore, the upper and lower abutments drive the locking element into the locking groove, achieving braking. If a single abutment were used to pass through the wheel seat from top to bottom, it would shear the abutment during the 360-degree rotation of the wheel, causing motion interference and preventing the wheel from rotating 360 degrees. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the braking device of the present invention;

[0029] Figure 2 for Figure 1 An exploded view (the wheels on the other side are omitted);

[0030] Figure 3 This is a cross-sectional view of the braking device in the released state;

[0031] Figure 4 This is a cross-sectional view of the braking device in braking mode;

[0032] Figure 5 A cross-sectional view of the brake release process;

[0033] Figure 6 A schematic diagram showing the locking element being engaged with the locking groove on the wheel;

[0034] Figure 7 A schematic diagram showing the locking element disengaging from the locking groove on the wheel;

[0035] Figure 8 This is an assembly diagram of the pedals, drive blocks, and frame.

[0036] Figure 9 A schematic diagram showing the pushing component driving the limiting turntable to abut against the first inclined wall of the limiting seat;

[0037] Figure 10 Exploded view of the limit seat, limit turntable, and pusher component;

[0038] Figure 11 A schematic diagram of the limit turntable and limit seat during braking;

[0039] Figure 12 This is a schematic diagram of the limit turntable and limit seat during braking;

[0040] Figure 13 A schematic diagram of the limit turntable and the pusher component during brake release;

[0041] Figure 14 This is a schematic diagram of the limit turntable and the pushing component during braking.

[0042] Figure 15 This is a schematic diagram of the limit turntable and the pushing component during the brake release process.

[0043] In the picture:

[0044] 1. Frame; 10. Wheel; 101. Lock groove; 11. Limiting seat; 111. Slide groove; 112. First inclined wall; 113. Limiting block; 113A. Second inclined wall; 12. Frame body; 13. Wheel seat;

[0045] 2. Locking mechanism; 20. Locking element; 21. Upper abutment; 211. Sixth inclined wall; 22. Lower abutment; 23. Tension spring; 24. Unlocking spring;

[0046] 3. Drive mechanism; 30. Foot pedal; 31. Push rod; 311. Seventh inclined wall; 32. Limiting turntable; 321. First abutment block; 321A. Third inclined wall; 322. Second abutment block; 322A. Fourth inclined wall; 33. Pushing component; 331. Slider; 331A. Fifth inclined wall; 34. Drive block; 35. First return spring; 36. Second return spring; 37. Third return spring. Detailed Implementation

[0047] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0048] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0049] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0052] The braking device in this embodiment is mainly used in many children's daily necessities. This embodiment describes its use in a children's stroller in detail.

[0053] like Figures 1-5 As shown, a braking device includes: a frame 1, a locking mechanism 2, and a driving mechanism 3.

[0054] A frame 1 with wheels 10 has a first parking position and a second parking position. The wheels 10 have several locking grooves 101. Specifically, the frame 1 has a limiting seat 11, which is detachable for ease of manufacturing. Both the first and second parking positions are located on the limiting seat 11. As shown in the diagram, the first parking position is to the right of the second parking position. The two parking positions allow the limiting turntable 32 to stop, facilitating switching between braking and de-braking states for the braking device. A brake gear is located on the wheel 10 and is linked to it. Multiple locking grooves 101 are evenly distributed around the circumference of the brake gear to allow the locking member 20 to be inserted into the locking grooves 101 in a timely manner, locking the wheel 10 and thus braking the device.

[0055] The locking mechanism 2 is mounted on the frame 1 and includes a locking member 20. The locking member 20 is movably mounted on the frame 1 to lock into or unlock from the locking groove 101. When the locking member 20 is locked into the locking groove 101, the wheel 10 is locked and the braking device is in a braking state. When the locking member 20 is unlocked from the locking groove 101, the wheel 10 is unlocked and can rotate freely. Specifically, the frame 1 includes a frame body 12 and a wheel seat 13. The wheel 10 is mounted on the wheel seat 13, and the wheel seat 13 can rotate 360 ​​degrees relative to the frame body 12, that is, the wheel 10 can rotate 360 ​​degrees relative to the frame body, which is equivalent to the wheel 10 being a swivel wheel. The locking mechanism 2 further includes an upper abutment 21 and a lower abutment 22. The upper abutment 21 is disposed in the frame 12 and abuts against the push rod 31. The lower abutment 22 is disposed in the wheel seat 13 and abuts against the upper abutment 21. The contact surfaces of the upper abutment 21 and the lower abutment 22 are flush with the interface between the wheel seat 13 and the frame 12. When the wheel seat 13 rotates 360 degrees relative to the frame, neither the upper abutment 21 nor the lower abutment 22 will interfere with the movement of the wheel seat 13, that is, neither the upper abutment 21 nor the lower abutment 22 will be subjected to shearing force. The push rod 31 can drive the locking member 20 to move up and down through the upper abutment 21 and the lower abutment 22. The locking member 20 includes a brake sleeve (not shown in the figure) and a locking pin. The locking pin is tensioned on the brake sleeve by a tension spring 23.

[0056] like Figures 6-7As shown, a tension spring 23 is provided at one end of the locking member 20 away from the locking groove 101; an unlocking spring 24 is provided in the wheel seat 13. When the limiting turntable 32 switches from the second parking position to the first parking position, the unlocking spring 24 can drive the locking member 20 to disengage from the locking groove 101. Specifically, one end of the tension spring 23 abuts against the locking pin, and the other end abuts against the brake sleeve, making the locking member 20 similar to a floating pin structure. When the locking member 20 is not aligned with the locking groove 101 on the wheel 10, the tension spring 23 in the locking member 20 will be compressed, and the locking member 20 will not rigidly squeeze the wheel 10. After the wheel 10 rotates, when the locking member 20 is aligned with the locking groove 101, the elastic force of the tension spring 23 can ensure that the locking member 20 is locked into the locking groove 101 and the wheel 10 is locked. The tension spring 23 can both avoid rigid collision with the wheel 10 and ensure the service life of the braking device, and ensure that the locking member 20 can be locked into the locking groove 101 in time. A protrusion (not shown in the figure) protrudes from the wheel seat 13. One end of the unlocking spring 24 rests against the protrusion, and the other end of the unlocking spring 24 rests against the brake sleeve of the locking member 20. When the locking member 20 is locked into the locking groove 101, the locking member 20 moves downward, causing the unlocking spring 24 to be compressed. When the upper end of the locking member 20 is not limited, that is, when the brake is released, the elastic force of the unlocking spring 24 causes the locking member 20 to move upward, and the locking member 20 disengages from the locking groove 101.

[0057] The upper abutment 21 is provided with a sixth inclined wall 211, and the push rod 31 is provided with a seventh inclined wall 311. The sixth inclined wall 211 can slide along the seventh inclined wall 311. In actual operation, the seventh inclined wall 311 on the push rod 31 and the sixth inclined wall 211 on the upper abutment 21 move against each other. When the push rod 31 moves to the left, the seventh inclined wall 311 can squeeze the sixth inclined wall 211, causing the upper abutment 21 to move downward, thereby causing the locking member 20 to move downward. When the push rod 31 moves to the right until the seventh inclined wall 311 slowly moves away from the sixth inclined wall 211, the upper abutment 21 moves upward, and the locking member 20 also moves upward.

[0058] In actual use, the wheel 10 of this embodiment is mounted on the wheel seat 13. Since the wheel 10 can rotate 360 ​​degrees along the frame 12, that is, the wheel 10 is equivalent to a caster wheel, the locking mechanism 2 is provided with separate upper abutment 21 and lower abutment 22 from top to bottom. The upper abutment 21 is located in the frame 12, and the lower abutment 22 is located in the wheel seat 13, ensuring that it will not interfere with the 360-degree rotation of the wheel 10, and can drive the locking member 20 to lock into the locking groove 101 through the upper abutment 21 and the lower abutment 22 to achieve braking. However, if a single abutment is provided that passes through the wheel seat 13 from top to bottom, it will shear the abutment when the wheel rotates 360 degrees, causing motion interference and making it impossible for the wheel 10 to rotate 360 ​​degrees.

[0059] like Figures 2-5 As shown, the drive mechanism 3 is mounted on the frame 1 and includes a foot pedal 30, a push rod 31, and a limiting turntable 32. The limiting turntable 32 is movably disposed at the first parking position or the second parking position, and pressing down on the foot pedal 30 can drive the limiting turntable 32 to switch between the first parking position and the second parking position; the push rod 31 moves against the limiting turntable 32, and the push rod 31 can drive the locking member 20 to lock into the locking groove 101; when the limiting turntable 32 is stopped at the first parking position (e.g., ...), the vehicle is in a safe position. Figure 3 When the locking member 20 disengages from the locking groove 101 (as shown), the limiting turntable 32 stops at the second stopping position (as shown). Figure 4 When (as shown), the locking member 20 is locked into the locking groove 101. From Figure 3 Location switch to Figure 4 The position, that is, the stopping position of the limit turntable 32, has shifted to the left, which in turn causes the position of the push rod 31 to shift to the left, causing the push rod 31 to drive the locking member 20 downward into the locking groove 101. Therefore, the first stopping position is to the right of the second stopping position.

[0060] like Figures 9-15 As shown, the driving mechanism 3 includes a pushing member 33, which is movably disposed on the limiting seat 11. The pushing member 33 can push the limiting turntable 32 to switch the limiting turntable 32 between the first stopping position and the second stopping position. Specifically, the limiting turntable 32 is provided with a plurality of first abutments 321 along its circumference, specifically four first abutments 321 evenly distributed; the inner wall of the limiting seat 11 is provided with a plurality of sliding grooves 111 and a plurality of first inclined walls 112 near the sliding grooves 111, the number of sliding grooves 111 and the number of first inclined walls 112 are both four and evenly distributed on the limiting seat 11; when the limiting turntable 32 is stopped at the second stopping position, the first abutments 321 abut against the first inclined walls 112; when the limiting turntable 32 is stopped at the first stopping position, the first abutments 321 are in the sliding grooves 111. Furthermore, the slide groove 111 is adjacent to the first inclined wall 112 to facilitate the smooth sliding of the first abutment block 321 from the slide groove 111 onto the first inclined wall 112. A limiting block 113 protrudes from the first inclined wall 112, and the first abutment block 321 can slide along the first inclined wall 112 and abut against the limiting block 113 to realize the switching from the first stopping position to the second stopping position. A second inclined wall 113A is provided on the limiting block 113, and the first abutment block 321 can slide along the second inclined wall 113A into the slide groove 111 to facilitate the switching of the limiting turntable 32 from the second stopping position to the first stopping position.

[0061] The limiting turntable 32 is further provided with four second abutment blocks 322 evenly distributed along its circumference. A second abutment block 322 is located between two adjacent first abutment blocks 321, and a first abutment block 321 is located between two adjacent second abutment blocks 322. The protrusion height of the first abutment block 321 is greater than that of the second abutment block 322. A third inclined wall 321A is provided on the first abutment block 321, a fourth inclined wall 322A is provided on the second abutment block 322, and a fifth inclined wall 331A is provided on the slider 331. The third inclined wall 321A and the fourth inclined wall 322A can slide along the fifth inclined wall 331A. When the braking device is in the braking state, the first abutment block 321 abuts against the first inclined wall 112, and the second abutment block 322 is aligned with the slide groove 111. When the braking device is in the de-braking state, the first abutment block 321 is in the slide groove 111. The pusher 33 is provided with four sliders 331 along its circumference, and the sliders 331 are slidably disposed in the groove 111. When the first abutment 321 is in the groove 111, the first abutment 321 abuts against the slider 331. When the pusher 33 is pushed to the left, the sliders 331 directly press the limiting turntable 32 to the left. When the first abutment 321 on the limiting turntable 32 disengages from the groove 111, the fifth inclined wall 331A on the slider 331 cooperates with the third inclined wall 321A on the first abutment 321, causing the limiting turntable 32 to rotate.

[0062] like Figure 8 As shown, the drive mechanism 3 includes a drive block 34. The foot pedal 30 is hinged to the frame 1 and movably abuts against the drive block 34. The drive block 34 is vertically detachable on the frame 1 and movably abuts against the pusher 33. The drive block 34 has an inclined surface, and the pusher 33 has another inclined surface, with the two inclined surfaces movably abutting against each other. The foot pedal 30 is provided with a first return spring 35 to ensure that the foot pedal 30 can quickly return to its original position. The drive block 34 is provided with a second return spring 36 to ensure that the drive block 34 can quickly return to its original position. The push rod 31 is provided with a third return spring 37 to ensure that the push rod 31 can quickly return to its initial state.

[0063] The braking process of this braking device (i.e., switching from the release state to the braking state) is as follows: The foot pedal 30 is pressed down, causing the foot pedal 30 to press down on the drive block 34. Simultaneously, the foot pedal 30 compresses the first return spring 35 downwards, and the drive block 34 compresses the second return spring 36 downwards. When the drive block 34 presses down, the inclined surface on the drive block 34 presses against the inclined surface on the pusher 33, causing the pusher 33 to move to the left. The pusher 33 slides to the left along the slide groove 111, thereby pushing the limiting turntable 32 to the left; the limiting turntable 32 pushes the push rod 31 to the left, and simultaneously, the third return spring 37 on the push rod 31 is compressed. The push rod 31 moves to the left, and the seventh inclined wall 311 on the push rod 31 presses against the sixth inclined wall 211 on the upper abutment 21, causing the upper abutment 21 to move downwards (the upper abutment 21 stops moving downwards when its top touches the bottom of the push rod 31). The upper abutment 21 drives the lower abutment 22 to move downward; the lower abutment 22 drives the locking member 20 to move downward and lock into the locking groove 101, while the unlocking spring 24 is compressed. When the foot pedal 30 is released, the foot pedal 30 and the drive block 34 are reset. Under the action of the third reset spring 37 and the push rod 31, the limiting turntable 32 slides along the first inclined wall 112 on the limiting seat 11 and abuts against the limiting block 113, no longer moving. That is, at this time the limiting turntable 32 stops at the second stopping position, and the braking is completed.

[0064] The braking process of this braking device (i.e., switching from the braking state to the braking state) is as follows: The foot pedal 30 is pressed down, causing the foot pedal 30 to press down on the drive block 34. Simultaneously, the foot pedal 30 compresses the first return spring 35 downwards, and the drive block 34 compresses the second return spring 36 downwards. When the drive block 34 presses down, the inclined surface on the drive block 34 presses against the inclined surface on the pusher 33, causing the pusher 33 to move to the left. The pusher 33 slides to the left along the slide groove 111, thereby pushing the limiting turntable 32 to the left. The limiting turntable 32 disengages from the first inclined wall 112 on the limiting seat 11, and pushes the push rod 31 to the left. Simultaneously, the third return spring 37 on the push rod 31 is compressed. The upper abutment 21, the lower abutment 22, and the locking member 20 are in a stationary state, with the locking member 20 locked in the locking groove 101. When the foot pedal 30 is released, the foot pedal 30 and drive block 34 reset. Under the action of push rod 31 and third reset spring 37, the first abutment 321 on the limiting turntable 32 slides into the slide groove 111 on the limiting seat 11 and slides to the left along the slide groove 111. The pusher 33 also slides to the left until the limiting turntable 32 stops at the first stopping position of the limiting seat 11. Push rod 31 moves to the right under the action of third reset spring 37. The sixth inclined wall 211 on the upper abutment 21 abuts against the seventh inclined wall 311 on the push rod 31. Under the action of unlocking spring 24, the upper abutment 21, lower abutment 22 and locking member 20 move upward. The locking member 20 disengages from the locking groove 101, completing the release of the brake.

[0065] In general, the braking device in this embodiment includes a limiting turntable 32 in the drive mechanism 3. The locking and unlocking of the locking member 20, i.e., the braking and de-braking of the braking device, are achieved by the position of the limiting turntable 32. When the limiting turntable 32 is stopped at the first stopping position, the braking device is in the de-braking state; when the limiting turntable 32 is stopped at the second stopping position, the braking device is in the braking state. Whether the limiting turntable 32 switches from the first stopping position to the second stopping position or vice versa, it can be done by stepping on the foot pedal 30, without needing to hook the foot pedal 30 with the foot when de-braking, thus preventing the shoe surface from being scratched or soiled. Each time the foot pedal 30 is pressed down, the limiting turntable 32 can only rotate in one direction (such as clockwise), realizing the switching between the braking and releasing states of the braking device. Four first abutment blocks 321 and four second abutment blocks 322 are evenly distributed around the circumference of the limiting turntable 32. Therefore, the limiting turntable 32 only needs to rotate about 45 degrees each time to complete the switching between the braking and releasing states. Moreover, each time the switching occurs, the fifth inclined wall 331A on the slider 331 pushes the third inclined wall 321A or the fourth inclined wall 322A on the limiting turntable 32, ensuring that there will be no accidental braking or mis-braking.

[0066] In this design, braking and releasing can be accomplished by stepping on the pedal 30, which can effectively prevent the shoe surface from being scratched or dirty; and the braking device can be applied to the 360-degree rotatable wheel 10.

Claims

1. A braking device, characterized in that, include: A frame with wheels, the frame having a first parking position and a second parking position, and the wheels having a plurality of locking grooves; A locking mechanism, mounted on the frame, includes a locking member that is movably and vertically mounted on the frame to lock into or unlock from the locking slot; A drive mechanism, mounted on the frame, includes a foot pedal, a push rod, and a limiting turntable. The limiting turntable is movably disposed at the first parking position or the second parking position, and pressing down on the foot pedal can drive the limiting turntable to switch between the first parking position and the second parking position. The push rod moves against the limiting turntable and can drive the locking member to lock into the locking groove. When the limiting turntable stops at the first stopping position, the locking member disengages from the locking groove; when the limiting turntable stops at the second stopping position, the locking member locks into the locking groove. The frame has a limiting seat, and the first parking position and the second parking position are both set on the limiting seat; the drive mechanism includes a pushing member, which is movably set on the limiting seat, and the pushing member can push the limiting turntable so that the limiting turntable switches between the first parking position and the second parking position; The limiting turntable is provided with a plurality of first abutments along its circumference; the inner wall of the limiting seat is provided with a plurality of sliding grooves and a plurality of first inclined walls near the sliding grooves; when the limiting turntable is stopped at the second stopping position, the first abutments abut against the first inclined walls; when the limiting turntable is stopped at the first stopping position, the first abutments are in the sliding grooves. The frame includes a frame body and wheel seats, the wheels are mounted on the wheel seats, and the wheel seats can rotate 360 ​​degrees relative to the frame body; the locking mechanism also includes an upper abutment and a lower abutment, the upper abutment is disposed in the frame body and abuts against the push rod; the lower abutment is disposed in the wheel seat and abuts against the upper abutment; the push rod can drive the locking member to move up and down through the upper abutment and the lower abutment.

2. The braking device according to claim 1, characterized in that, The groove is adjacent to the first inclined wall, and a limiting block protrudes from the first inclined wall. The first abutment can slide along the first inclined wall and abut against the limiting block.

3. The braking device according to claim 2, characterized in that, The limiting block is provided with a second inclined wall, and the first abutment block can slide into the groove along the second inclined wall.

4. The braking device according to claim 2, characterized in that, The pusher is provided with a plurality of sliders along its circumference, and the sliders are slidably disposed in the groove. When the first abutment is in the groove, the first abutment abuts against the slider.

5. The braking device according to claim 4, characterized in that, The limiting turntable has four first abutments evenly distributed along its circumference, and the limiting turntable also has four second abutments evenly distributed along its circumference. There is a second abutment between two adjacent first abutments and a first abutment between two adjacent second abutments. The protrusion height of the first abutment is greater than the protrusion height of the second abutment. The number of the sliding grooves is four. The first abutment block is provided with a third inclined wall, the second abutment block is provided with a fourth inclined wall, and the slider is provided with a fifth inclined wall. The third inclined wall can slide along the fifth inclined wall, and the fourth inclined wall can slide along the fifth inclined wall.

6. The braking device according to claim 1, characterized in that, The upper abutment is provided with a sixth inclined wall, and the push rod is provided with a seventh inclined wall. The sixth inclined wall can slide along the seventh inclined wall. The locking member is provided with a tension spring at the end away from the locking groove; the wheel seat is provided with an unlocking spring. When the limiting turntable switches from the second parking position to the first parking position, the unlocking spring can drive the locking member to disengage from the locking groove.

7. The braking device according to claim 1, characterized in that, The drive mechanism includes a drive block, the foot pedal is hinged to the frame and moves against the drive block; the drive block is vertically and vertically mounted on the frame and moves against the pushing member. The foot pedal is provided with a first return spring, the drive block is provided with a second return spring, and the push rod is provided with a third return spring.

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