Brake structure of a child stroller and detection device thereof

Abstract

The application relates to a brake structure of a child stroller and a detection device thereof, which comprises a body with wheels, a wheel frame rotationally connected with the body and provided with the wheels, a locking device capable of locking the wheels at any angle, a transmission device for locking or unlocking the wheels, and two pedals, one of which is used for locking and the other of which is used for unlocking. The locking device comprises locking blocks elastically arranged on the wheel frame and a plurality of locking discs arranged on the body of the wheels and coaxially arranged with the wheels. A plurality of locking grooves are equidistantly arranged on the outer wall of the locking disc, and the locking block is inserted into any one of the locking grooves to lock the wheels. The pedal, the transmission device and the locking device are used to simultaneously brake the double wheels by pressing one side of the pedal, and the effect of braking the wheels at any angle is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of baby strollers, in particular to a brake structure of a child stroller and a detection device thereof. BACKGROUND

[0002] At present, a brake device is configured on a baby stroller, so that the baby stroller has the function of stopping and parking. The existing brake device generally realizes braking by locking a locking piece into a locking groove of a wheel through a foot pedal. When it is necessary to release the brake, the locking piece is driven to separate from the locking groove by hooking the foot upward.

[0003] However, in this process, the same pedal is used in the braking and unlocking processes, so it is necessary to step down or lift up, which causes the problem of inconvenient operation. In addition, the wheel needs to be swung to the initial position, i.e. the actual 90° position, to stop, which has the defect of not being suitable for actual application. SUMMARY

[0004] In order to improve the above problems, the present application provides a brake structure of a child stroller and a detection device thereof.

[0005] The brake structure of the child stroller provided by the present application adopts the following technical scheme:

[0006] The brake structure of the child stroller comprises:

[0007] a machine body having a wheel;

[0008] a wheel frame rotatably connected to the frame body and on which the wheel is arranged;

[0009] a locking device capable of locking the wheel at any angle;

[0010] a transmission device for locking or unlocking the wheel;

[0011] a pedal arranged in two, one of which is used for locking and the other of which is used for unlocking;

[0012] The locking device comprises a locking block elastically arranged on the wheel frame and a plurality of locking discs arranged on the frame body of the wheel, and the locking discs are arranged on the same axis as the wheel. The outer wall of the locking disc is arranged with a plurality of locking grooves at equal intervals, and the locking block is inserted into any one of the locking grooves to lock the wheel.

[0013] Further, the transmission device comprises:

[0014] a rotating body fixedly connected to the wheel frame and rotatably connected to the machine body;

[0015] A lifting column is arranged in the rotating body and rotates with the rotating body, and the rotating column is slidingly arranged in the rotating body;

[0016] A transmission rod is used to connect the rotating body and the locking block, and the transmission rod is elastically arranged in the rotating body and is shaped to fit the shape of the wheel frame;

[0017] A driving mechanism is used to realize the lifting column moving along the vertical direction, and the driving mechanism is used to control the lifting column moving up and down by the power of the pedal.

[0018] Further, the driving mechanism comprises:

[0019] A driving block is in abutment with the bottom of the pedal and moves along the vertical direction;

[0020] A horizontal rod is slidingly arranged in the machine body, one end of the horizontal rod is in abutment with the side of the driving block and is pushed to move horizontally;

[0021] A limiting component is used to limit the moving direction of the horizontal rod and the lifting position of the lifting column;

[0022] A lifting frame is used to convert the horizontal movement of the horizontal rod into the vertical movement of the lifting frame;

[0023] The lifting frame is elastically arranged in the machine body, and the lifting frame is in abutment with the upper surface of the lifting column.

[0024] Further, the limiting component comprises:

[0025] A limiting piece moves horizontally and is disposed in the moving direction of the horizontal rod, and the limiting piece is elastically arranged in the machine body;

[0026] A connecting column comprises a column body and a protruding part, and the column body is used to connect the protruding part and the lifting frame;

[0027] The limiting piece is provided with a limiting groove, the width of the horizontal cross section of the limiting groove gradually decreases towards the direction of the protruding part, the protruding part is clamped above the limiting piece, and the column body is slidingly arranged in the limiting groove.

[0028] Further, the side wall of the rotating column is provided with a plurality of connecting parts connected with the rotating body, the connecting part comprises two half rings and a connecting column fixedly connected with the rotating body, the bottom end of the connecting column is connected with the top end of the transmission rod, and the connecting column and the two half rings are clamped by a stepped structure;

[0029] Two said half rings are fixedly connected with the lifting column, and two said half rings wrap the connecting column, the rotating column is provided with a connecting hole, the connecting column is matched with the connecting hole, and rotation of the rotating body together with the lifting column is realized.

[0030] Further, the driving mechanism further comprises an adjusting assembly for intermittent cooperation between the two pedals;

[0031] The adjusting assembly comprises:

[0032] An adjusting shaft is rotationally connected with the machine body;

[0033] A locking rod has one end fixedly connected with the outer wall of the adjusting shaft and the other end rotationally connected with the driving block; the locking rod is further provided with a locking protrusion, and the locking protrusion is slidingly arranged on the bottom surface of the pedal;

[0034] An unlocking rod has one end fixedly connected with the adjusting shaft and the other end fixedly connected with an unlocking protrusion, and the unlocking protrusion is slidingly arranged on the bottom surface of the other pedal;

[0035] The two pedals move and elastically slide on the machine body along the vertical direction.

[0036] Further, the upper surfaces of the traversing rods are fixedly connected with limiting blocks, the machine body is fixedly connected with a stop block, the stop block is provided with a stop groove, one end of the limiting block penetrating through the stop groove is provided with a limiting protrusion, and the limiting protrusion is used to ensure that the inclined surface of the traversing rod abuts against the inclined surface of the driving block.

[0037] A detection device of a brake structure of a child stroller, comprising:

[0038] A machine body fixing and centering module is used to position and fix the child stroller;

[0039] A wheel rotating and torque loading module is used to rotate the wheel and apply torque to the wheel;

[0040] and a central control and data acquisition system is used to coordinate control of each module and acquire and process data.

[0041] Further, the pedal servo driving module comprises at least two independent driving arms, and each driving arm is provided with a force sensor for driving the locking pedal and the unlocking pedal and measuring the driving force, respectively.

[0042] Further, the wheel rotating and torque loading module comprises a servo motor and a torque sensor, the servo motor is used to accurately position the wheel to any angle and apply torque after braking, and the torque sensor is used to measure the maximum static locking torque that the brake system can withstand.

[0043] In summary, the beneficial technical effects of the present application are:

[0044] 1. Since the two wheel frames move towards two different directions, people cannot guarantee the orientation of the two wheel frames when using the stroller. If relying on the brake structure in the prior art, the user needs to adjust the orientation of the two wheel frames to lock. The locking device in the present application can lock when the two wheel frames are at any angle. In addition, the transmission device can achieve the effect of one step and two brakes, i.e., the effect of two pedals is to be able to step and stop two wheels at the same time or unlock two wheels at the same time, greatly improving the convenience and adaptability of the child stroller.

[0045] 2. The locking protrusions on the locking rod and the unlocking protrusions on the unlocking rod will not contact the corresponding pedals. If the locking effect pedal is downwardly pressed, the driving block moves downwardly. Under the cooperation of the driving block and the inclined surface of the horizontal rod, the horizontal rod moves horizontally and moves upwardly. The protrusion and the column part limit the movement of the horizontal rod. At the same time, the inclined surface of the horizontal rod cooperates with the inclined surface of the lifting frame, and the lifting frame moves downwardly. At the same time, the rotating body and the wheel frame can swing to any angle, but in this process, the four legs of the lifting frame are always in contact with the top of the lifting column. Therefore, as the lifting frame moves downwardly, the lifting column is driven to move downwardly. Under the connection of the transmission rod, the sliding block and the locking block move downwardly. The locking block moves into the locking groove. The friction between the driving protrusion and the driving hole and the friction between the locking block and the locking groove are sufficient to overcome the elastic force of the corresponding spring, so as to ensure that the wheel is always in the locked state.

[0046] 3. By means of the servo system and the high-precision sensor, the key performance indicators such as the stepping force and the locking torque are converted from subjective feeling to accurate and repeatable physical data, greatly improving the scientificity and accuracy of detection. The 360° range of the wheel can be tested automatically, and the possible locking blind area can be completely checked, ensuring the comprehensive reliability of the "arbitrary angle locking" function. The whole detection process is automatically completed by the central system control without manual intervention, the detection speed is fast, and the quality inspection efficiency on the production line is greatly improved, and the labor cost is reduced. The detection report containing detailed data is automatically generated, which is convenient for statistical analysis, continuous improvement and problem tracing of product quality, and provides strong data support for product research and development and quality management. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0048] Figure 2 is a schematic diagram of the locking device and the transmission device in the embodiment of the present application;

[0049] Figure 3 is a schematic diagram of a transmission device in the embodiment of the present application;

[0050] Figure 4 is a schematic diagram of a driving mechanism in the embodiment of the present application;

[0051] Figure 5 is a schematic diagram of a connecting portion and a transmission rod in the embodiment of the present application.

[0052] Explanation of reference signs:

[0053] 1, a body;

[0054] 2, a wheel frame;

[0055] 3, a wheel; 6, a pedal;

[0056] 4, a locking block; 41, a locking disc; 42, a locking groove; 43, a sliding block;

[0057] 5, a rotating body; 51, a lifting column; 52, a transmission rod; 53, a driving block; 531, a driving protrusion; 532, a driving hole;

[0058] 54, a horizontal moving rod; 541, a limiting block; 542, a limiting protrusion; 543, a stop block; 544, a stop groove; 545, a waist-shaped groove;

[0059] 55, a lifting frame; 551, a supporting disc; 552, a supporting leg;

[0060] 56, a limiting piece; 561, a columnar portion; 562, a protruding portion; 563, a limiting groove;

[0061] 57, a half ring; 58, a connecting column; 59, a connecting hole;

[0062] 6, an adjusting shaft; 61, a locking rod; 62, a locking protrusion; 63, an unlocking rod; 64, an unlocking protrusion. DETAILED DESCRIPTION

[0063] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0064] The embodiment of the present application discloses a brake structure of a child stroller. With reference to Figures 1-5It comprises a body 1 with wheels 3; the wheels 3 are provided with two wheel frames 2, which are rotationally connected with the frame body and the wheels 3 are arranged on the wheel frames 2; the same wheel frames 2 are provided with two wheel frames 2, which can rotate horizontally along 360° on the body 1; during pushing the stroller, the moving direction of the stroller is controlled by the person, so that the stroller can move in various directions, and the rotation directions of the two wheels 3 can be different, that is, the rotation modes of the two wheel frames 2 do not interfere with each other.

[0065] The locking device can lock the wheels 3 at any angle.

[0066] The transmission device is used for locking or unlocking the wheels 3.

[0067] The pedals 6 are provided with two, one of which is locked and the other is unlocked.

[0068] Further, since the two wheel frames 2 move in two different directions, the person using the stroller cannot guarantee the direction of the two wheel frames 2, and the person needs to adjust the direction of the two wheel frames 2 to lock it by relying on the brake structure in the prior art. The locking device in the application can lock the wheels 3 at any angle, and the transmission device can realize the effect of one pedal and two brakes, that is, the effect of the two pedals 6 can simultaneously stop or unlock the two wheels 3, greatly improving the convenience and adaptability of the child stroller.

[0069] The locking device comprises a locking block 4 elastically arranged on the wheel frame 2 and a plurality of locking discs 41 arranged on the frame body of the wheel 3, and the locking disc 41 is coaxially arranged with the wheel 3. The outer wall of the locking disc 41 is provided with a plurality of locking grooves 42 at equal intervals, the locking block is inserted into any locking groove 42 to lock the wheel 3, the side of the locking block 4 away from the locking disc 41 is fixedly connected with a sliding block 43, the wheel frame 2 is provided with a sliding groove corresponding to the sliding block 43 for sliding, of course, the side of the sliding groove facing the wheel 3 is provided with an opening, and the two ends of the sliding groove along the vertical direction are closed, of course, the cross section of the sliding block 43 and the inner wall of the sliding groove can be provided with a T-shaped cross section, so that the sliding block 43 can only slide along the length direction of the sliding groove, and the locking block 4 is vertically arranged in the wheel frame 2, the locking disc 41 is arranged on the axis of the wheel 3 and the wheel frame 2, that is, the locking disc 41 is located on the central axis of the wheel 3, the locking grooves 42 are distributed at equal intervals, and in actual use, the corners of the locking grooves 42 need to be chamfered, the upper side and the side of the locking groove 42 facing the wheel frame 2 are provided with openings, and the locking block 4 is inserted into the locking groove 42 along the vertical direction, so as to realize the locking effect of the wheel 3.

[0070] The transmission device comprises: a rotating body 5 fixedly connected with the wheel frame 2 and rotationally connected with the machine body 1; a lifting column 51 arranged in the rotating body 5 and rotating together with the rotating body 5, and the rotating column is slidingly arranged in the rotating body 5; a transmission rod 52 for connecting the lifting column 51 and the locking block 4, the transmission rod 52 being elastically arranged in the rotating body 5; the transmission rod 52 is shaped to fit the shape of the wheel frame 2; the rotating body 5 is used to connect the wheel frame 2 and the machine body 1, and realizes the effect of rotating 360° through a bearing, in addition, the rotating body 5 rotates together with the lifting column 51, that is, at any time, the lifting column 51 rotates together with the rotating body 5, and it can also be understood that the lifting column 51 rotates together with the wheel frame 2, but it does not affect the vertical movement of the lifting column 51, the transmission rod 52 connects the lifting column 51 and the locking block 4, and in the embodiment, the transmission rod 52 is connected with the top end of the sliding block 43, so as to push the lifting movement of the locking block 4.

[0071] The side wall of the rotating column is provided with a plurality of connecting parts connected with the rotating body 5, the connecting part comprises two half rings 57 and a connecting column 58 fixedly connected with the rotating body 5, the bottom end of the connecting column 58 is connected with the top end of the transmission rod 52, the connecting column 58 and the two half rings 57 are all connected by a stepped structure, the half rings 57 are fixedly connected with the lifting column 51, the two half rings 57 wrap the connecting column 58, the rotating column is provided with a connecting hole 59, the connecting column 58 is matched with the connecting hole 59, and the rotating body 5 and the lifting column 51 rotate together, and under the limitation of the connecting hole 59 of the connecting column 58, the lifting column 51 can only realize the lifting movement in the rotating body 5.

[0072] The angle of the cross-sectional circular arc of the two half rings 57 is less than 180°, which facilitates the connection of the two half rings 57 and the connecting column 58, but in the embodiment, the connecting column 58 drives the transmission rod 52 to move together, the inner walls of the two half rings 57 are both provided with stepped grooves, the two half rings 57 wrap the connecting column 58, and the bottom end of the connecting column 58 is arranged in the stepped groove, so that the connecting column 58 moves together with the lifting column 51, but in the embodiment, in order to ensure the elastic movement of the locking block 4, springs are arranged between the connecting column 58 and the rotating body 5 and between the sliding block 43 and the wheel frame 2 to realize elastic connection, so that when the main unlocking operation is performed, the connecting column 58 moves upward in the rotating body 5 and the sliding block 43 also moves upward in the wheel frame 2, the effect of rapid unlocking is realized, and the lifting column 51 is ensured to return to the initial position, so that the next locking operation is normally performed.

[0073] The driving mechanism is used to realize the movement of the lifting column 51 along the vertical direction, and is used to control the lifting movement of the lifting column 51 by the power of the pedal 6; in the embodiment, the driving mechanism is used to control the movement of the lifting column 51 towards, but since the rotating body 5 rotates together with the lifting column 51, but during the rotation, the cooperation between the driving mechanism and the lifting column 51 is not affected, and the driving mechanism can still control the movement of the lifting column 51 along the vertical direction, and then can still control the movement of the locking block 4 along the vertical direction, and the wheel 3 can be locked, and finally the wheel 3 can be locked when the wheel 3 swings at any angle.

[0074] The driving mechanism comprises a driving block 53 which abuts against the bottom of the pedal 6 and moves along the vertical direction; the cross section of the driving block 53 is triangular, and the vertex of the cross section of the driving block 53 faces downward, and the horizontal surface of the driving block 53 faces upward, i.e. the position facing the pedal 6; a horizontal moving rod 54 which is slidingly arranged in the machine body 1; one end of the horizontal moving rod 54 abuts against the side surface of the driving block 53 and is pushed to move horizontally; the end of the horizontal moving rod 54 close to the driving block 53 is provided with an inclined surface, and the inclined surface of the horizontal moving rod 54 is in contact with the inclined surface of the driving block 53, i.e. the inclination angle of the horizontal moving rod 54 is consistent with the inclination angle of the inclined surface of the driving block 53, and during the movement of the driving block 53 towards the bottom, the driving block 53 extrudes the horizontal moving rod 54 towards both sides, so as to realize the rotation of the driving block 53 towards the bottom to the horizontal direction of the horizontal moving rod 54.

[0075] The lifting frame 55 is used to convert the horizontal movement of the horizontal moving rod 54 into the vertical movement of the lifting frame 55; the lifting frame 55 is elastically arranged in the machine body 1, and the lifting frame 55 abuts against the upper surface of the lifting column 51; the machine body 1 is fixedly connected with a supporting disc 551 which is arranged in line with the central axis of the rotating body 5, and the supporting disc 551 is connected with the lifting frame 55 through a spring, so as to realize the automatic lifting effect of the lifting frame 55; the lifting frame 55 comprises a head disc and four supporting legs 552 which are slidingly arranged in the machine body 1, and the bottom ends of the four supporting legs 552 abut against the upper surface of the lifting column 51; since the lifting column 51 rotates together with the rotating body 5, but during the rotation of the rotating body 5, the four supporting legs 552 are always in the position abutting against the upper surface of the lifting column 51, so that the movement of the locking block 4 along the vertical direction can be controlled when the rotating body 5 rotates at any angle, and finally the wheel 3 can be locked when the wheel 3 swings at any angle.

[0076] The limiting assembly is used to limit the moving direction of the traversing rod 54 and the lifting position of the lifting column 51. The limiting assembly comprises a limiting piece 56 horizontally moving and limiting the moving direction of the traversing rod 54, the limiting piece 56 being elastically arranged in the machine body 1; a connecting column 58 comprising a column body 561 and a protruding part 562, the column body 561 being used to connect the protruding part 562 and the lifting frame 55; the limiting piece 56 is arranged with a limiting groove 563, the width of the horizontal section of the limiting groove 563 gradually decreasing towards the protruding part 562, and the protruding part 562 being clamped above the limiting piece 56, and the column body 561 being slidingly arranged in the limiting groove 563; the part with small angle of the limiting groove 563 in the limiting piece 56 is connected by a spring with the machine body 1, because the upper surface of the limiting piece 56 is in abutment with the bottom surface of the protruding part 562 in the initial position, and the protruding part 562 is always above the upper surface of the position with the smallest angle of the limiting groove 563 under the elastic action between the limiting piece 56 and the machine body 1, finally realizing the limiting of the lifting position of the lifting column 51 by the connecting column 58, and the end of the traversing rod 54 away from the driving block 53 is arranged with an open waist-shaped groove 545, the connecting column 58 sliding in the waist-shaped groove 545, thereby achieving the effect of limiting the horizontal movement of the traversing rod 54.

[0077] The driving mechanism further comprises an adjusting assembly for intermittent cooperation between the two pedals 6; the adjusting assembly comprises an adjusting shaft 6 rotationally connected with the machine body 1; the axis direction of the adjusting shaft 6 is arranged along the direction perpendicular to the moving direction of the traversing rod 54, and the two pedals 6 are also symmetrically arranged relative to the axis direction of the adjusting shaft 6, but because the machine body 1 is arranged with a vertical hole for the sliding of the pedals 6, the pedals 6 can only move along the vertical direction;

[0078] A locking rod 61 is fixedly connected at one end with the outer wall of the adjusting shaft 6 and rotationally connected at the other end with the driving block 53; the locking rod 61 is further arranged with a locking protrusion 62 slidingly arranged with the bottom surface of the pedal 6; an unlocking rod 63 is fixedly connected at one end with the adjusting shaft 6 and fixedly connected at the other end with an unlocking protrusion slidingly arranged with the bottom surface of the other pedal 6; the two pedals 6 move and elastically slide on the machine body 1 along the vertical direction, first, the bottom of the pedal 6 is arranged with four moving blocks, and the machine body 1 is arranged on the inner wall of the vertical hole with moving grooves for the sliding of the moving blocks, the moving grooves being slidingly adapted with the moving blocks, further guiding the pedals 6 in the vertical direction, and the bottom of the pedal 6 and the machine body 1 are further arranged with four springs, thereby enabling the pedals 6 to realize the effect of automatic reset.

[0079] In the initial state, the locking protrusion 62 on the locking rod 61 and the unlocking protrusion on the unlocking rod 63 do not contact the corresponding pedal 6. When the locking pedal 6 is stepped down, the driving block 53 moves downward. Under the cooperation of the inclined surface on the driving block 53 and the transverse rod 54, the transverse rod 54 moves along the transverse direction and moves upward. The protrusion 562 and the column 561 limit the movement of the transverse rod 54, and the inclined surface of the transverse rod 54 cooperates with the inclined surface of the lifting frame 55, so that the lifting frame 55 moves downward. At the same time, the rotating body 5 and the wheel frame 2 can swing to any angle, but in this process, the four feet 552 of the lifting frame 55 are always in contact with the top of the lifting column 51, so as the lifting frame 55 moves downward, the lifting column 51 is driven to move downward. Under the connection of the transmission rod 52, the sliding block 43 and the locking block 4 move downward, and the locking block 4 moves into the locking groove 42. In this embodiment, the body 1 is also provided with a driving hole 532 for inserting the driving block 53. The end of the driving block 53 is provided with a driving protrusion 531. When the driving protrusion 531 is inserted into the driving hole 532, the friction between the driving protrusion 531 and the driving hole 532 and the friction between the locking block and the locking groove are sufficient to overcome the elastic force of the corresponding spring, so that the wheel 3 is always in the locked state.

[0080] In the locking process, the locking protrusion 62 contacts the bottom surface of the corresponding locking pedal 6, but in this process, the unlocking protrusion also starts to move upward under the transmission of the adjusting shaft 6, but it still does not contact or just contacts the bottom surface of the corresponding pedal 6. Therefore, when unlocking is needed, the unlocking pedal 6 is stepped down. In this embodiment, the pedal 6 can be marked with an unlocking or locking icon, so as to remind the user of the function of the corresponding pedal 6. When the unlocking pedal 6 is stepped down, the unlocking protrusion drives the unlocking rod 63 to move downward, and at this time the locking rod 61 moves upward, and the driving protrusion 531 is pulled out of the driving hole 532. At this time, the locking pedal 6 moves to a position away from the unlocking protrusion, and under the elastic force of the corresponding spring, the lifting column 51 and the locking block 4 return to the initial position, and the locking of the wheel 3 is released. At this time, the unlocking pedal 6 also returns to the initial position without external force of the worker, so as to facilitate the next locking and unlocking work.

[0081] Meanwhile, the position of the traversing rods 54 needs to be limited, the upper surfaces of the traversing rods 54 are fixedly connected with limiting blocks, the machine body 1 is fixedly connected with a stop block 543, the stop block 543 is provided with a stop groove 544, one end of the limiting block 541 penetrating through the stop groove 544 is provided with a limiting protrusion, the limiting protrusion is used for ensuring that the inclined surfaces of the traversing rods 54 abut against the inclined surface of the driving block 53, similarly, the limiting block 541 is also provided with a stepped groove, so that the limiting block 541 can limit the movement distance of the traversing rods 54; when the limiting protrusion 542 is clamped on the side surface of the stop block 543, the main role is that the traversing rods 54 can return to the initial position during unlocking, if the position of the traversing rods 54 is not limited, the distance between the traversing rods 54 close to each other is reduced, and even the driving block 53 is squeezed out of the gap between the two traversing rods 54, so that the driving work of the traversing rods 54 cannot be realized next time, that is, the locking work is affected; similarly, under the action of the stepped groove of the limiting block 541, when the locking block 4 is inserted into the locking groove 42, the transmission rod 52 is always in a stressed state, the service life of the transmission rod 52 is affected, the normal locking work of the wheel 3 is affected, and the driving block 53 and the traversing rods 54 can always be in the abutting state during the locking work, and the unlocking work of the wheel 3 is also affected.

[0082] In another embodiment, a detection device for a brake structure of a child stroller includes a machine body fixing and centering module for positioning and fixing the child stroller. In this embodiment, the machine body fixing and centering module uses a plurality of clamps to fix and center the child stroller. The child stroller is kept absolutely stationary, thereby eliminating measurement errors caused by movement of the stroller.

[0083] The wheel rotation and torque loading module includes a servo motor, a chuck, and a high-precision torque sensor. The chuck is used to clamp the wheel or tire. The chuck and the servo motor are connected through the high-precision torque sensor. The pedal servo drive module uses a locking drive arm and an unlocking drive arm to align with the locking pedal and the unlocking pedal, respectively. In this embodiment, a force sensor is installed at the end of each drive arm. In this embodiment, a central control and data acquisition system is used to start a preset detection program, and the steps are as follows:

[0084] Step A: Preparation and positioning. The stroller is fixed, and the modules are connected to the corresponding parts of the stroller.

[0085] Step B: Wheel angle positioning. The central control system sends a command to control the servo motor in the wheel rotation and torque loading module to rotate the wheel to the first test angle, for example, 0°. The servo motor can achieve high-precision angle positioning through the built-in encoder.

[0086] Step C: Perform locking operation, pedal servo drive module, control locking drive arm to descend, to set the speed and pressure down the locking pedal, in the process, force sensor real-time monitoring of the force, record the minimum force F required to make the brake structure completely engaged lock _min and the final peak force F peak .

[0087] Step D: Load torque and measurement, after confirming that the brake has been locked, the servo motor starts to apply a reverse or positive torque to the wheel, the torque starts from 0, increases linearly at a smooth rate (for example 1 N·m / s), at the same time, the torque sensor will feedback the real-time torque value to the central control system 40.

[0088] Step E: Determine brake failure, during the process of loading torque, by monitoring the encoder of the servo motor, determine whether the wheel has a small angular displacement, once the detection of the wheel starts to rotate, it indicates that the locking device of the brake system has been damaged, the brake failure.

[0089] Step F: Record data and cycle, at the moment of detecting brake failure, record the reading of the torque sensor at this time, this value is the "maximum static locking torque T _max " at the current angle, then the unlock drive arm down the unlock pedal, to confirm that the brake can be normally released. After that, the system determines whether all the preset angles have been tested. If not, return to step B, control the servo motor to rotate the wheel to the next test angle (for example 1°, or 5°), and repeat steps C to F. If yes, the test is over, integrate all the test data (pedal force, maximum locking torque, etc.) to generate a complete test report, and determine whether the brake system is qualified.

[0090] The implementation principle of the brake structure of the child stroller and the detection device thereof is as follows: in the initial state, the locking protrusion 62 on the locking rod 61 and the unlocking protrusion on the unlocking rod 63 do not contact the corresponding pedal 6. If the locking effect pedal 6 is downwardly pressed, the driving block 53 moves downwardly. Under the cooperation of the driving block 53 and the inclined surface of the horizontal rod 54, the horizontal rod 54 moves horizontally and moves toward the lifting direction. The protruding part 562 and the column part 561 limit the movement of the horizontal rod 54, and the inclined surface of the horizontal rod 54 cooperates with the inclined surface of the lifting frame 55, so that the lifting frame 55 moves downwardly. At the same time, the rotating body 5 and the wheel frame 2 can swing to any angle, but in this process, the four supporting legs 552 of the lifting frame 55 are always in abutment with the top of the lifting column 51, so that as the lifting frame 55 moves downwardly, the lifting column 51 is driven to move downwardly. Under the connection of the transmission rod 52, the sliding block 43 and the locking block 4 move downwardly, and the locking block 4 moves into the locking groove 42. In this embodiment, the body 1 is also provided with a driving hole 532 for inserting the driving block 53. The end of the driving block 53 is provided with a driving protrusion 531. When the driving protrusion 531 is inserted into the driving hole 532, the friction between the driving protrusion 531 and the driving hole 532 and the friction between the locking block and the locking groove are sufficient to overcome the elastic force of the corresponding spring, so that the wheel 3 is always in the locked state.

[0091] Therefore, when unlocking is needed, the unlocking pedal 6 is pressed downwardly. When the unlocking pedal 6 is pressed downwardly, the unlocking protrusion abuts against the unlocking rod 63, and the unlocking rod 63 moves downwardly. At this time, the locking rod 61 moves upwardly, and the driving protrusion 531 is pulled out of the driving hole 532. At this time, the locking pedal 6 moves to a position separated from the unlocking protrusion. Under the elastic force of the corresponding spring, the lifting column 51 and the locking block 4 return to the initial position, the locking of the wheel 3 is released, and at this time, the unlocking pedal 6 also returns to the initial position without external force of the worker, so as to facilitate the next locking and unlocking work.

[0092] Through the servo system and the high-precision sensor, the key performance indicators such as the stepping force and the locking torque are converted from subjective feeling to accurate and repeatable physical data, which greatly improves the scientificity and accuracy of detection. The 360° range of the wheel can be tested automatically, and the possible locking blind area is completely checked, so that the “arbitrary angle locking” function is fully reliable. The whole detection process is automatically completed by the central system control without manual intervention, the detection speed is fast, the quality inspection efficiency on the production line is greatly improved, and the labor cost is reduced. The detection report containing detailed data is automatically generated, which is convenient for statistical analysis, continuous improvement and problem tracing of product quality, and provides strong data support for product research and development and quality management.

[0093] Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein and the claims section will be interpreted as being consistent with the intended meaning as set forth herein. For example, "first", "second", "third", and similar terms are used only to distinguish one element from another and are not intended to denote a physical, chronological or hierarchical order or importance. Also, the terms "a" and "an" are used only to denote "at least one" of an element. The terms "comprises", "comprising", "includes", "including" and the like can mean "including but not limited to". The terms "coupled", "connected" and the like can mean either an indirect or direct connection in which the components so connected allow the flow of current between them. The terms "upper", "lower", "left", "right", and the like are used only to denote relative positions for ease of description and can change when the absolute position of the described object changes.

[0094] The above are only preferred embodiments of the present application, not intended to limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A brake structure of a child's cart, characterized by, The utility model relates to a kind of vehicle, including: Machine body (1) with wheel (3); Wheel frame (2), with frame body rotation connection and the wheel (3) is arranged on the wheel frame (2); Locking device, wheel (3) can be locked at any angle; Transmission, for locking or unlocking wheel (3); Pedal (6), set to two, one is locked, the other is unlocked; The locking device includes locking block (4) elastically arranged on the wheel frame (2) and multiple locking discs (41), the locking disc (41) is arranged on the frame body of the wheel (3), and the locking disc (41) is coaxially arranged with the wheel (3), the outer wall of the locking disc (41) is equidistantly provided with multiple locking grooves (42), and the locking block is inserted into any one of the locking grooves (42) to lock the wheel (3).

2. The brake structure of a child's stroller according to claim 1, wherein The transmission includes: Rotary body (5), fixedly connected with the wheel frame (2) and rotationally connected with the machine body (1); Lifting column (51), arranged in the rotary body (5) and rotated with the rotary body (5), and the rotating column is slidingly arranged in the rotary body (5); Transmission rod (52), for connecting the rotation and the locking block (4), the transmission rod (52) is elastically arranged in the rotary body (5);The shape of the transmission rod (52) is adapted to the shape of the wheel frame (2); Driving mechanism, for realizing the lifting column (51) along the vertical direction movement, the driving mechanism is used to control the lifting column (51) lifting movement by the power of the pedal (6).

3. The brake structure of a child's stroller according to claim 2, wherein The driving mechanism includes: Driving block (53), abutting with the bottom of the pedal (6) and moving along the vertical direction; Crossing rod (54), slidingly arranged in the machine body (1);One end abuts with the side surface of the driving block (53) and is pushed to move horizontally; Limiting component, for limiting the movement direction of the crossing rod (54) and the lifting position of the lifting column (51); Lifting frame (55), for converting the horizontal movement of the crossing rod (54) into the vertical movement of the lifting frame (55); The lifting frame (55) is elastically arranged in the machine body (1), and the lifting frame (55) abuts with the upper surface of the lifting column (51).

4. The brake structure of a child's stroller according to claim 3, wherein The limiting component includes: Limiting sheet (56), moving horizontally and being disposed in the movement direction of the crossing rod (54), the limiting sheet (56) is elastically arranged in the machine body (1); Connecting column (58), including column body (561) and protruding part (562), the column body (561) is used for connecting the protruding part (562) and the lifting frame (55); The limiting sheet (56) is provided with a limiting groove (563), the width dimension of the horizontal section of the limiting groove (563) gradually decreases towards the protruding part (562), and the protruding part (562) is clamped above the limiting sheet (56), and the column body (561) is slidingly arranged in the limiting groove (563).

5. The brake structure of a child's stroller according to claim 4, wherein The rotating column side wall is provided with a plurality of connecting parts connected with the rotating body (5), the connecting parts include two half rings (57) and a connecting column (58) fixedly connected with the rotating body (5), the bottom end of the connecting column (58) is connected with the top end of the transmission rod (52), and the connecting column (58) and the two half rings (57) are all clamped in a stepped structure; Both of the two half rings (57) are fixedly connected with the lifting column (51), the two half rings (57) wrap the connecting column (58), the rotating column is provided with a connecting hole (59), the connecting column (58) is matched with the connecting hole (59), and the rotating body (5) and the lifting column (51) are rotated together.

6. The brake structure of a child's vehicle according to claim 5, wherein The driving mechanism further comprises an adjusting assembly for intermittent cooperation between the two footboards (6); The adjusting assembly comprises: An adjusting shaft (6) is rotationally connected with the machine body (1); A locking rod (61) is fixedly connected with the outer wall of the adjusting shaft (6) at one end and rotationally connected with the driving block (53) at the other end; the locking rod (61) is further provided with a locking protrusion (62), and the locking protrusion (62) is slidably arranged on the bottom surface of the footboard (6); An unlocking rod (63) is fixedly connected with the adjusting shaft (6) at one end and fixedly connected with an unlocking protrusion at the other end, and the unlocking protrusion is slidably arranged on the bottom surface of the other footboard (6); The two footboards (6) move and elastically slide on the machine body (1) along the vertical direction.

7. The brake structure of a child's vehicle according to claim 6, wherein The upper surfaces of the traversing rods (54) are fixedly connected with limiting blocks, the machine body (1) is fixedly connected with a stop block (543), the stop block (543) is provided with a stop groove (544), one end of the limiting block (541) penetrating through the stop groove (544) is provided with a limiting protrusion, and the limiting protrusion is used for ensuring that the inclined surface of the traversing rod (54) abuts against the inclined surface of the driving block (53).

8. A detection device for detecting the performance of the brake structure of a child stroller according to any one of claims 1-7, characterized in that, It comprises: A machine body fixing and centering module is used for positioning and fixing the child stroller; A wheel rotating and torque loading module is used for rotating the wheels and applying torque to the wheels; And a central control and data acquisition system is used for coordinating the control of the modules and acquiring and processing data.

9. The detection device of a brake structure of a child stroller according to claim 8, characterized in that, It comprises: The footboard servo driving module comprises at least two independent driving arms, each of which is provided with a force sensor, and is used for driving the locking footboard and the unlocking footboard respectively and measuring the driving force.

10. The detection device of a brake structure of a child stroller according to claim 9, wherein, It comprises: The wheel rotating and torque loading module comprises a servo motor and a torque sensor, the servo motor is used for accurately positioning the wheels to any angle and applying torque after braking, and the torque sensor is used for measuring the maximum static locking torque that can be borne by the brake system.

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