Brake device for buggy

Abstract

The utility model belongs to the field of buggies, and provides a brake device for a buggy, which comprises a rear wheel assembly, a brake assembly and a brake assembly, the locking assembly is arranged in the rear wheel assembly, and the locking assembly can be movably inserted into a hub of the wheel so as to limit rotation of the wheel; the brake assembly is provided with a first position and a second position and is rotationally connected to the rear wheel assembly, a first locking groove and a second locking groove which are communicated with each other are formed in the brake assembly, and the locking assembly can be movably clamped in the first locking groove or the second locking groove. Compared with the prior art, the brake pedal locking device has the advantages that the clamping block can slide into the second locking groove from the first locking groove through rotating force applied to the brake pedal, the locking block is released to move in the direction parallel to the axis of the wheel and be inserted into the hub of the wheel, rotation of the wheel is limited, the overall structure is simple, and the brake pedal locking device is convenient to use. And convenience is brought to a user to rapidly achieve the brake function of the wheel, and guarantee is provided for the safety of a child during riding.

Description

Technical Field

[0001] The utility model belongs to the field of children's vehicles, and in particular relates to a brake device used for children's vehicles. Background Art

[0002] A children's stroller is a tool vehicle designed specifically to provide convenience for children's outdoor activities. With the improvement of living standards, children's strollers have become a necessary daily necessity for bringing children.

[0003] Most strollers on the market rely on adults to push and pull them. However, when children encounter some slopes or emergencies during independent riding, adults are required to quickly brake the stroller to ensure the safety of the children. However, the brake structure in existing strollers is relatively complicated, which not only increases the entire assembly process, but also increases the manufacturing cost, seriously affecting the convenience of adults in performing quick braking operations on the stroller. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a brake device for a baby carriage.

[0005] The utility model solves the technical problem by adopting a technical solution of providing a brake device for a baby carriage, comprising: a rear wheel assembly, provided with a wheel;

[0006] A locking assembly is arranged in the rear wheel assembly, and the locking assembly can be movably inserted in the wheel hub of the wheel to limit the rotation of the wheel;

[0007] A brake assembly having a first position and a second position, rotatably connected to the rear wheel assembly, wherein the brake assembly is provided with a first locking groove and a second locking groove which are interconnected, and the locking assembly can be movably engaged in the first locking groove or the second locking groove;

[0008] When the brake assembly is in the first position, the locking assembly is movably engaged in the first locking groove, so that the locking assembly is retracted into the rear wheel assembly to allow the wheel to rotate normally;

[0009] The locking assembly can be movably engaged in the second locking groove when the brake assembly is rotated and switched to the second position, so that the locking assembly can be movably inserted in the wheel hub along a direction parallel to the wheel axis to limit the rotation of the wheel.

[0010] In the above-mentioned braking device for a children's vehicle, the locking assembly includes a first elastic member and a locking block, one end of the first elastic member is connected to the locking block, and the other end is connected to the rear wheel assembly; a snap block is formed on the locking block, and the snap block can be movably snapped into the first locking groove or the second locking groove.

[0011] In the above-mentioned brake device for a children's vehicle, the openings of the first locking groove and the second locking groove are both facing away from the wheel, and the distance from the bottom of the first locking groove to the wheel is greater than the distance from the bottom of the second locking groove to the wheel.

[0012] In the above-mentioned brake device for a baby carriage, the brake assembly comprises:

[0013] A rotating tube, on which a brake pedal is detachably mounted;

[0014] A connecting tube, which is coaxially arranged with the rotating tube, a connecting cap is rotatably arranged on the rear wheel assembly, one end of the connecting tube is used to connect with the wheel, and the other end connects the connecting tube with the rotating tube through the connecting cap;

[0015] The fan-shaped block is arranged on the outer wall of the connecting tube, and the first locking groove and the second locking groove which are interconnected are both arranged on the fan-shaped block, so that when the engaging block is movably engaged with the first locking groove or the second locking groove, the locking block and the connecting tube are both arranged in parallel.

[0016] In the above-mentioned braking device for a children's vehicle, the rear wheel assembly further comprises:

[0017] The rear wheel bracket is provided with a mounting block, the mounting block is formed with a mounting cavity and a mounting hole which are interconnected, the connecting pipe passes through the mounting hole and is connected to the wheel;

[0018] A fixing block and a guide hole, wherein the fixing blocks are symmetrically arranged in the installation cavity and located on both sides of the guide hole, the fixing block and the inner wall of the installation cavity jointly form a guide groove opening toward the wheel, the guide groove is connected to the guide hole, and the locking block is movably arranged in the guide groove; the axis of the guide hole is arranged parallel to the axis of the installation hole, and one end of the first elastic member away from the locking block is connected to the guide hole;

[0019] The sealing cover is sleeved on the connecting pipe and connected to the mounting block. A guide groove is formed on the sealing cover. The locking block can pass through the guide groove and be movably inserted in the wheel hub of the wheel.

[0020] In the above-mentioned brake device for a baby stroller, a U-shaped locking portion is formed at the end of the locking block away from the first elastic member, so that the U-shaped locking portion can be movably inserted into the wheel hub of the wheel.

[0021] In the above-mentioned brake device for a baby stroller, an arc-shaped limit block is further provided in the installation cavity, and the two side walls of the sector block are movably pressed against the arc-shaped limit block to limit the rotation angle of the connecting tube.

[0022] In the above-mentioned brake device for a baby carriage, a locking block is movably provided on the mounting block, a clearance groove is formed on the connecting pipe, a mounting shaft movably inserted in the connecting pipe is connected to the wheel, and a third locking groove arranged in an annular shape is formed on the mounting shaft;

[0023] When the third locking groove is connected to the clearance groove, the locking block can pass through the clearance groove and extend into the third locking groove during rotation to limit the axial displacement of the installation shaft.

[0024] In the above-mentioned braking device for a children's vehicle, a limiting groove is formed on the mounting block, the locking block is rotatably arranged in the limiting groove, and one end of the locking block is rotatably connected to the mounting block, and a second elastic member is connected between the other end and the mounting block.

[0025] In the above-mentioned brake device for a baby stroller, a third elastic member and a sliding block are further provided at the end of the rear wheel bracket away from the wheel, one end of the third elastic member is connected to the rear wheel assembly, and the other end is connected to the sliding block; a mounting groove is formed on the baby stroller, and a locking groove is provided at the bottom of the mounting groove;

[0026] The sliding block can press the third elastic member when the rear wheel bracket slides into the installation groove, and push the sliding block to extend into the locking groove when the third elastic member is elastically reset.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] (1) The utility model discloses a brake device for a children's vehicle. The brake pedal is subjected to a rotational force applied by an adult, so that the engaging block can slide from a first locking groove into a second locking groove, thereby releasing the locking block to move in a direction parallel to the axis of the wheel, and finally being inserted into the wheel hub to limit the rotation of the wheel. The brake device has a simple overall structure, is easy to install, and reduces manufacturing costs. At the same time, it can quickly realize the braking function of the wheel, which brings convenience to the user's operation and also provides protection for the safety of children when riding.

[0029] (2) The locking block is matched with the second elastic member so that the locking block can pass through the clearance groove and extend into the third locking groove, thereby effectively ensuring the stability of the connection between the wheel and the rear wheel bracket during the use of the child vehicle. At the same time, the locking block can also be separated from the third locking groove when squeezed by external force, thereby realizing the rapid removal and installation of the wheel.

[0030] (3) The third elastic member is used in conjunction with the sliding block so that the sliding block can be inserted into the locking groove during installation to achieve the connection between the rear wheel bracket and the child stroller. The structure is simple and the operation is convenient and fast. While improving the installation efficiency, it also provides convenience for subsequent maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a perspective view of the brake assembly in a first position;

[0032] Figure 2 This is a view of the installation structure of the locking assembly and the rear wheel bracket;

[0033] Figure 3 It is an exploded view of the rotating tube, connecting tube, brake pedal and connecting cap;

[0034] Figure 4 yes Figure 1 Cross-sectional view of the state;

[0035] Figure 5 This is a view of the installation structure when the locking block is locked in the first locking groove;

[0036] Figure 6 This is a view of the installation structure when the engaging block is engaged in the second locking groove;

[0037] Figure 7 yes Figure 4 Sectional view at AA in the middle;

[0038] Figure 8 yes Figure 1 Cross-sectional view at the middle BB.

[0039] In the figure, 1, rear wheel assembly; 10, wheel; 100, mounting shaft; 101, third locking groove; 11, connecting cap; 12, rear wheel bracket; 120, third elastic member; 121, sliding block; 13, mounting block; 130, mounting cavity; 131, mounting hole; 132, arc-shaped limit block; 133, limit groove; 14, fixing block; 140, guide groove; 15, guide hole; 16, cover; 160, guide groove; 17, locking block; 18, second elastic member;

[0040] 2. Locking assembly; 20. First elastic member; 21. Locking block; 210. Engaging block; 211. U-shaped locking portion;

[0041] 3. Brake assembly; 30. Rotating tube; 31. Brake pedal; 32. Connecting tube; 320. Displacement groove; 33. Fan-shaped block; 330. First locking groove; 331. Second locking groove;

[0042] 40. Mounting slot; 400. Locking slot. DETAILED DESCRIPTION

[0043] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0044] like Figure 1 As shown, in this solution, the brake device used in the baby carriage is mainly described in detail, but the brake device is not limited to being used in the baby carriage, and can also be used in other places, such as a children's dining chair.

[0045] like Figures 1 to 8 As shown, the utility model is a brake device for a children's vehicle, comprising: a rear wheel assembly 1, provided with a wheel 10; a locking assembly 2, arranged in the rear wheel assembly 1, the locking assembly 2 can be movably inserted in the wheel hub of the wheel 10 to limit the rotation of the wheel 10; a brake assembly 3 having a first position and a second position, rotatably connected to the rear wheel assembly 1, the brake assembly 3 is provided with a first locking groove 330 and a second locking groove 331 that are interconnected, the locking assembly 2 can be movably engaged in the first locking groove 330 or the second locking groove 331; when the brake assembly 3 is in the first position, the locking assembly 2 is movably engaged in the first locking groove 330, so that the locking assembly 2 is retracted into the rear wheel assembly 1, so that the wheel 10 can rotate normally; the locking assembly 2 can be movably engaged in the second locking groove 331 when the brake assembly 3 is rotated and switched to the second position, so that the locking assembly 2 can be movably engaged in the wheel hub along a direction parallel to the axis of the wheel 10 to limit the rotation of the wheel 10.

[0046] This solution is mainly to achieve rapid emergency braking of the children's car. Specifically, Figure 1 , Figures 4 to 6 As shown, in Figure 1 and Figure 4 The brake assembly 3 in the state is in the first position, that is, the wheel 10 can rotate normally for the baby carriage to ride. When facing a large slope or encountering an emergency, the user can rotate the brake assembly 3 to make the locking assembly 2 slide from the first locking groove 330 of the brake assembly 3 into the second locking groove 331 (such as Figures 5 and 6state), and it is precisely because of the replacement of the locking position of the locking assembly 2 that the locking assembly 2 can be released and moved in a direction parallel to the axis of the wheel 10 when it was originally retracted into the rear wheel assembly 1, and finally inserted into the hub of the wheel 10, thereby preventing the wheel 10 from continuing to rotate. The overall structure of the brake device is simple, which effectively reduces the manufacturing cost, and can quickly realize the braking function of the wheel 10, which brings convenience to the user's operation and also provides protection for the safety of children when riding.

[0047] The locking assembly 2 includes a first elastic member 20 and a locking block 21. One end of the first elastic member 20 is connected to the locking block 21, and the other end is connected to the rear wheel assembly 1. A snap block 210 is formed on the locking block 21, and the snap block 210 can be movably snapped into the first locking groove 330 or the second locking groove 331.

[0048] like Figures 4 to 6 As shown, the locking assembly 2 in this solution is composed of a first elastic member 20 and a locking block 21. Figure 1 and Figure 4 In the state shown, the engaging block 210 on the locking block 21 is movably engaged in the first locking groove 330, and as the brake assembly 3 moves along Figure 5 Turn clockwise to Figure 6 In the state shown, due to the change in the position of the first locking groove 330 and the second locking groove 331, the first elastic member 20 gradually begins to elastically deform, thereby pushing the locking block 21 to drive the engaging block 210 to slide from the first locking groove 330 to the second locking groove 331, so as to complete the locking block 21 being actively inserted into the wheel hub of the wheel 10 during the release process, thereby realizing the emergency braking function of the children's vehicle.

[0049] Preferably, the openings of the first locking groove 330 and the second locking groove 331 in this solution are both facing away from the wheel 10 (see Figure 5 and Figure 6 ), and the distance from the bottom of the first locking groove 330 to the wheel 10 is greater than the distance from the bottom of the second locking groove 331 to the wheel 10. Because of the different positions of the first locking groove 330 and the second locking groove 331 relative to the wheel 10, when the above-mentioned engaging block 210 slides from the first locking groove 330 to the second locking groove 331, the elastic deformation of the first elastic member 20 is coordinated to complete the release of the locking block 21 in a direction perpendicular to the wheel 10. Similarly, when the wheel 10 is restored from the braking state to the normal driving state, the overall structure is simple, which also brings convenience to the user's operation.

[0050] The brake assembly 3 includes: a rotating tube 30, on which a brake pedal 31 is detachably installed; a connecting tube 32, which is coaxially arranged with the rotating tube 30, and a connecting cap 11 is rotatably provided on the rear wheel assembly 1, one end of the connecting tube 32 is used to connect the wheel 10, and the other end connects the connecting tube 32 to the rotating tube 30 through the connecting cap 11; a fan-shaped block 33, which is arranged on the outer wall of the connecting tube 32, and a first locking groove 330 and a second locking groove 331 that are interconnected are both arranged on the fan-shaped block 33, so that when the locking block 210 is movably engaged with the first locking groove 330 or the second locking groove 331, the locking block 21 and the connecting tube 32 are both in a parallel arrangement.

[0051] like Figure 3 and Figure 4 As shown, it is worth noting that the rotating tube 30 and the connecting tube 32 in this solution are not integrally formed, but are connected by the connecting cap 11 on the rear wheel assembly 1. Figure 3 It can be seen that the connection points between the connecting cap 11 and the rotating tube 30 and the connecting tube 32 are all square-shaped. The cooperation between the square hole and the square shaft ensures the synchronous rotation of the connecting cap 11, the connecting tube 32 and the rotating tube 30, thereby avoiding relative rotation among the three during emergency braking and affecting the smoothness of the locking block 21 when it is movably inserted in the wheel hub, thereby greatly improving the stability of the braking device. Of course, the connection method between the three components is not limited to the one in the present embodiment, and other structures such as spline connection can also be used to achieve a detachable installation method, which provides convenience for the disassembly and installation of the brake pedal 31. Preferably, the brake pedal 31 in this scheme is installed in a Figure 1 The position shown is conducive to adults quickly completing the emergency brake function of the children's car by pedaling and turning, which greatly improves the convenience of user operation.

[0052] Further reference Figure 3 The fan-shaped block 33 is arranged on the connecting tube 32 to ensure that when the engaging block 210 is movably engaged in the first locking groove 330 or the second locking groove 331, there will be no position interference with the connecting tube 32, and it also ensures that the locking block 21 is always in a parallel position with the connecting tube 32, so that the locking block 21 is released in a direction perpendicular to the wheel 10 as the connecting tube 32 rotates, and finally is movably inserted in the wheel hub to complete the braking function of the children's car.

[0053] The rear wheel assembly 1 further includes: a rear wheel bracket 12, equipped with a mounting block 13, on which a mounting cavity 130 and a mounting hole 131 are formed, which are interconnected, and a connecting pipe 32 passes through the mounting hole 131 and is connected to the wheel 10; a fixing block 14 and a guide hole 15, wherein the fixing block 14 is symmetrically arranged in the mounting cavity 130 and is located on both sides of the guide hole 15, and the fixing block 14 and the inner wall of the mounting cavity 130 jointly form a guide groove 14 opening toward the wheel 10 0, the guide groove 140 is connected to the guide hole 15, and the locking block 21 is movably arranged in the guide groove 140; the axis of the guide hole 15 is arranged parallel to the axis of the mounting hole 131, and the end of the first elastic member 20 away from the locking block 21 is connected to the guide hole 15; the cover 16 is sleeved on the connecting pipe 32 and connected to the mounting block 13, and a guide groove 160 is formed on the cover 16, and the locking block 21 can pass through the guide groove 160 and be movably inserted in the wheel hub of the wheel 10.

[0054] like Figure 2 and Figure 4 As shown, the locking block 21 and the connecting pipe 32 are both arranged in the mounting block 13 of the rear wheel bracket 12, wherein each fixing block 14 is arranged in an L-shape, so that the symmetrically placed fixing blocks 14 and the inner wall of the mounting cavity 130 form a guide groove 140, and the guide groove 140 can provide the locking block 21 with a certain degree of rotation. Figure 4 The guiding and limiting effects during the horizontal reciprocating movement ensure that when the engaging block 210 slides from the first locking groove 330 into the second locking groove 331, the locking block 21 can be movably inserted into the wheel hub along the opening direction of the guide groove 140 (i.e., the opening is perpendicular to the wheel 10). In addition, a guide hole 15 connected to the guide groove 140 is formed on the mounting block 13. Figure 4 As shown, one end of the first elastic member 20 is connected to the end of the locking block 21 away from the wheel 10, and the other end extends into the guide hole 15 and is connected thereto. That is to say, the guide hole 15 limits the radial displacement of the first elastic member 20, so that during the elastic deformation process, the first elastic member 20 can accurately apply a force to move the locking block 21 in a direction perpendicular to the wheel 10, thereby ensuring the smoothness and stability of the braking function of the structure.

[0055] Preferably, in this solution, the axis of the guide hole 15 is arranged parallel to the axis of the mounting hole 131. Figure 2 As shown, this design ensures that when the connecting tube 32 inserted in the mounting hole 131 rotates, the engaging block 210 can smoothly slide from the first locking groove 330 into the second locking groove 331. On the other hand, it also ensures that the installation position of the locking block 21 and the position of the connecting tube 32 are staggered and placed in parallel to each other, so as to ensure that the locking block 21 is fixed along the mounting hole 131. Figure 4During the horizontal rightward movement, it can be accurately and movably inserted into the wheel hub of the wheel 10, satisfying the user's requirement for rapid braking.

[0056] Further, if Figures 4 to 6 As shown, the cover 16 in the present solution can be connected to the mounting block 13 by means of screws or other connecting members, and the mounting cavity 130 on the mounting block 13 is mostly sealed by the cover 16 to prevent dirt or water from splashing into the mounting cavity 130 when the wheel 10 rotates, thereby extending the service life of the brake device; at the same time, in order to ensure the stability of the locking block 21 when it is movably inserted in the wheel hub, a guide groove 160 is provided on the cover 16. It is worth noting that when the engaging block 210 is at Figure 5 When the wheel 10 is in the first locking groove 330 as shown (at this time the wheel 10 can travel normally), the end of the locking block 21 away from the first elastic member 20 is in a flush posture with the end of the guide groove 160 close to the wheel 10, and the engaging block 210 is movably engaged with the first elastic member 20. Figure 6 The locking block 21 is then inserted into the wheel hub when the locking block 21 is in the second locking groove 331 as shown. The locking block 21 can be quickly extended into the direction of the guide groove 160 and inserted into the wheel hub. It can be seen that the guide groove 160 effectively prevents the end of the locking block 21 away from the first elastic member 20 from shaking during movement, thereby improving the smoothness and stability of the locking block 21 when it is movably inserted into the wheel hub; and the end of the locking block 21 away from the first elastic member 20 is in a flush posture with the end of the guide groove 160 close to the wheel 10, which also effectively ensures that when the locking block 210 slides from the first locking groove 330 into the second locking groove 331, the cover 16 can be extended out and inserted into the wheel hub at the first time when the locking block 21 moves, thereby realizing the fast and stable emergency braking function required for the children's car.

[0057] A U-shaped locking portion 211 is formed at the end of the locking block 21 away from the first elastic member 20 , so that the U-shaped locking portion 211 can be movably inserted into the hub of the wheel 10 .

[0058] Continue to refer Figure 5 and Figure 6 The U-shaped locking portion 211 is formed at the end of the locking block 21 away from the first elastic member 20. Since the wheel hub of the wheel 10 is mostly discontinuous grooves (not shown in the figure), the U-shaped locking portion 211 can be accurately inserted into two adjacent grooves on the wheel hub as the locking block 21 moves, so as to ensure the stability of the locking block 21 when the wheel 10 is braked suddenly, and also provide protection for the safety of the children's car when riding.

[0059] Preferably, if Figure 2As shown, an arc-shaped limit block 132 is also provided in the installation cavity 130. When the connecting tube 32 drives the fan-shaped block 33 to rotate, the two side walls of the fan-shaped block 33 can be movably pressed against the arc-shaped limit block 132. This structure is used to effectively limit the rotation angle of the connecting tube 32, thereby preventing the locking block 210 from being separated from the fan-shaped block 33 and unable to be accurately movably engaged in the first locking groove 330 or the second locking groove 331, thereby improving the stability of the brake device.

[0060] A locking block 17 is also movably provided on the mounting block 13, a clearance groove 320 is formed on the connecting tube 32, and a mounting shaft 100 movably inserted in the connecting tube 32 is connected to the wheel 10, and a third locking groove 101 arranged in an annular shape is formed on the mounting shaft 100; when the third locking groove 101 is connected to the clearance groove 320, the locking block 17 can pass through the clearance groove 320 and extend into the third locking groove 101 during rotation to limit the axial displacement of the mounting shaft 100.

[0061] like Figure 4 and 7 As shown, the locking block 17 in the present embodiment is rotatably arranged in the mounting block 13. When the wheel 10 drives the mounting shaft 100 to be inserted in the connecting tube 32, the locking block 17 can pass through the clearance groove 320 and extend into the locking groove on the mounting shaft 100 during the rotation of its rotation center, thereby effectively preventing the mounting shaft 100 from generating axial displacement or even detaching from the rear wheel bracket 12 during the rotation of the wheel 10, thereby greatly improving the stability of the brake device structure.

[0062] Preferably, the length of the clearance groove 320 in this solution is just enough for the connecting tube 32 to drive the rotation of the sector block 33, that is, the clearance groove 320 does not affect the smoothness and stability of the engaging block 210 when it is engaged and slidable in the first locking groove 330 and the second locking groove 331. Similarly, the locking groove in this solution is annularly arranged on the mounting shaft 100 (not shown in the figure), so that when the locking block 17 is Figure 7 When the locking block 17 is deeply inserted into the locking groove in the state shown, the normal rotation of the wheel 10 is not affected. The locking block 17 is only extended into the locking groove to ensure the stability of the wheel 10 relative to the rear wheel bracket 12 during the rotation process.

[0063] A limiting groove 133 is formed on the mounting block 13 , and the locking block 17 is rotatably disposed in the limiting groove 133 . One end of the locking block 17 is rotatably connected to the mounting block 13 , and a second elastic member 18 is connected between the other end and the mounting block 13 .

[0064] It should be noted that, when the wheel 10 is in a normal driving state, the elastic force of the second elastic member 18 pushes the locking block 17 to rotate around the rotation center of the locking block 17, thereby always pressing the locking block 17 against the locking groove. Figure 7 As shown, the thrust exerted by the second elastic member 18 on the locking block 17 is not in the same straight line as the rotation center of the locking block 17 itself. Figure 4 and Figure 6 The limiting groove 133 shown can provide the locking block 17 with a limiting and guiding effect when the locking block 17 rotates, and the elastic force of the second elastic member 18 is applied to the locking block 17. Figure 7 When the end shown in FIG. 1 is aligned with the second elastic member 18 , it can effectively ensure that the other end of the locking block 17 away from the second elastic member 18 can smoothly pass through the clearance groove 320 and be inserted into the locking groove.

[0065] When the wheel 10 needs to be disassembled for repair or replacement, since a small part of the end of the locking block 17 close to the second elastic member 18 extends out of the mounting block 13, it can achieve a hidden design and facilitate the user to push the locking block 17 and squeeze the second elastic member 18, so that the locking block 17 rotates and disengages from the locking groove, and then the wheel 10 and the mounting shaft 100 are removed from the rear wheel bracket 12 together, which provides convenience for subsequent repairs and replacements.

[0066] A third elastic member 120 and a sliding block 121 are also provided at the end of the rear wheel bracket 12 away from the wheel 10. One end of the third elastic member 120 is connected to the rear wheel assembly 1, and the other end is connected to the sliding block 121. A mounting groove 40 is formed on the baby carriage, and a locking groove 400 is provided at the bottom of the mounting groove 40. The sliding block 121 can squeeze the third elastic member 120 when the rear wheel bracket 12 slides into the mounting groove 40, and when the third elastic member 120 is elastically reset, the sliding block 121 is pushed into the locking groove 400.

[0067] like Figure 8 As shown, a mounting groove 40 is formed at the bottom of the child vehicle seat. During the installation process, the rear wheel bracket 12 can drive the sliding block 121 to extend into the mounting groove 40, which also makes the sliding block 121 originally extending out of the rear wheel bracket 12 be squeezed by the inner wall of the mounting groove 40, and squeezed in the direction of the third elastic member 120 and contracted into the rear wheel bracket 12. When the rear wheel bracket 12 is in the mounting groove 40, the locking groove 400 is just flush with the sliding block 121. Relying on the elastic reset of the third elastic member 120, the sliding block 121 extends out of the rear wheel bracket 12 again and is inserted in Figure 8 The locking groove 400 shown in the figure thus realizes the connection between the rear wheel bracket 12 and the baby stroller. The overall structure is relatively simple, which provides convenience for the user in installation and disassembly, and also reduces the space occupied by the baby stroller when it is stored when not in use.

[0068] It should be noted that the first elastic member 20, the second elastic member 18 and the third elastic member 120 in this solution can be compression springs, return springs or other return devices.

[0069] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0070] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0071] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A brake device for a baby carriage, characterized in that: include: A rear wheel assembly, configured with a wheel; A locking assembly is arranged in the rear wheel assembly, and the locking assembly can be movably inserted in the wheel hub of the wheel to limit the rotation of the wheel; A brake assembly having a first position and a second position, rotatably connected to the rear wheel assembly, wherein the brake assembly is provided with a first locking groove and a second locking groove which are interconnected, and the locking assembly can be movably engaged in the first locking groove or the second locking groove; When the brake assembly is in the first position, the locking assembly is movably engaged in the first locking groove, so that the locking assembly is retracted into the rear wheel assembly to allow the wheel to rotate normally; The locking assembly can be movably engaged in the second locking groove when the brake assembly is rotated and switched to the second position, so that the locking assembly can be movably inserted in the wheel hub along a direction parallel to the wheel axis to limit the rotation of the wheel.

2. A brake device for a baby carriage according to claim 1, characterized in that: The locking assembly includes a first elastic member and a locking block, one end of the first elastic member is connected to the locking block, and the other end is connected to the rear wheel assembly; a snap block is formed on the locking block, and the snap block can be movably snapped into the first locking groove or the second locking groove.

3. A brake device for a children's vehicle according to claim 1, characterized in that: The openings of the first locking groove and the second locking groove are both facing away from the wheel, and the distance from the bottom of the first locking groove to the wheel is greater than the distance from the bottom of the second locking groove to the wheel.

4. A brake device for a children's vehicle according to claim 2, characterized in that: The brake assembly comprises: A rotating tube, on which a brake pedal is detachably mounted; A connecting tube, which is coaxially arranged with the rotating tube, a connecting cap is rotatably arranged on the rear wheel assembly, one end of the connecting tube is used to connect with the wheel, and the other end connects the connecting tube with the rotating tube through the connecting cap; The fan-shaped block is arranged on the outer wall of the connecting tube, and the first locking groove and the second locking groove which are interconnected are both arranged on the fan-shaped block, so that when the engaging block is movably engaged with the first locking groove or the second locking groove, the locking block and the connecting tube are both arranged in parallel.

5. A brake device for a children's vehicle according to claim 4, characterized in that: The rear wheel assembly also includes: The rear wheel bracket is provided with a mounting block, the mounting block is formed with a mounting cavity and a mounting hole which are interconnected, the connecting pipe passes through the mounting hole and is connected to the wheel; A fixing block and a guide hole, wherein the fixing blocks are symmetrically arranged in the installation cavity and located on both sides of the guide hole, the fixing block and the inner wall of the installation cavity jointly form a guide groove opening toward the wheel, the guide groove is connected to the guide hole, and the locking block is movably arranged in the guide groove; the axis of the guide hole is arranged parallel to the axis of the installation hole, and one end of the first elastic member away from the locking block is connected to the guide hole; The sealing cover is sleeved on the connecting pipe and connected to the mounting block. A guide groove is formed on the sealing cover. The locking block can pass through the guide groove and be movably inserted in the wheel hub of the wheel.

6. A brake device for a children's vehicle according to claim 2, characterized in that: A U-shaped locking portion is formed at the end of the locking block away from the first elastic member, so that the U-shaped locking portion can be movably inserted into the wheel hub of the wheel.

7. A brake device for a children's vehicle according to claim 5, characterized in that: An arc-shaped limiting block is also arranged in the installation cavity, and the two side walls of the sector block are movably pressed against the arc-shaped limiting block to limit the rotation angle of the connecting pipe.

8. The brake device for a children's vehicle according to claim 5, characterized in that: The mounting block is also movably provided with a locking block, the connecting pipe is formed with a clearance groove, the wheel is connected with a mounting shaft movably inserted in the connecting pipe, and the mounting shaft is formed with a third locking groove arranged in an annular shape; When the third locking groove is connected to the clearance groove, the locking block can pass through the clearance groove and extend into the third locking groove during rotation to limit the axial displacement of the installation shaft.

9. A brake device for a children's vehicle according to claim 8, characterized in that: A limiting groove is formed on the mounting block, the locking block is rotatably disposed in the limiting groove, one end of the locking block is rotatably connected to the mounting block, and a second elastic member is connected between the other end and the mounting block.

10. A brake device for a baby carriage according to claim 5, characterized in that: The end of the rear wheel bracket away from the wheel is also provided with a third elastic member and a sliding block, one end of the third elastic member is connected to the rear wheel assembly, and the other end is connected to the sliding block; a mounting groove is formed on the baby carriage, and a locking groove is provided at the bottom of the mounting groove; The sliding block can press the third elastic member when the rear wheel bracket slides into the installation groove, and push the sliding block to extend into the locking groove when the third elastic member is elastically reset.

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