Hand-push type child tricycle

Abstract

The utility model discloses a hand-push type child tricycle which comprises a main beam and a rear seat tube arranged at the rear end of the main beam, a fixed upper cover is arranged at the upper end of the rear seat tube, a fixed lower cover is arranged at the lower end of the rear seat tube, a steering device is arranged on the rear seat tube, and the steering device comprises a rear push rod, a rotating upper cover, a synchronizing shaft, a rotating shaft, a linkage block and a rotating lower cover. The rotating upper cover and the rotating lower cover are fixedly connected through bolts, the rotating upper cover and the rotating lower cover clamp the fixed upper cover and the fixed lower cover at the upper end and the lower end of the rear seat pipe respectively, the rotating shaft is rotationally arranged between the rotating upper cover and the rotating lower cover, the linkage block is fixedly arranged on the outer surface of the rotating shaft, and the two ends of the linkage block are each provided with a lug plate. The synchronizing shaft is fixedly arranged at the lower end of the rear push rod; a first limiting groove is concavely formed in the upper end of the rotating shaft; during assembly, the rear push rod penetrates through the rotating upper cover to be connected with the synchronizing shaft, the synchronizing shaft is embedded into the first limiting groove, and when the rear push rod is rotated, the synchronizing shaft drives the rotating shaft to rotate.

Description

Technical Field

[0001] This utility model relates to the field of stroller technology, and in particular to a push-type children's tricycle. Background Technology

[0002] Currently, children's tricycles are designed for children to pedal and ride, and to allow adults to push the vehicle, a handlebar is installed at the rear. However, the assembly and disassembly structure between the handlebar and the frame on current children's tricycles is complex, and the steering function is poor, easily leading to problems such as jamming due to overly tight assembly and difficulty in turning. Utility Model Content

[0003] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a steering push handle that can be quickly installed with the frame, effectively solving the drawbacks of complex installation and removal of the rear push rod and poor steering function, and avoiding the problems of jamming and difficulty in turning caused by excessive tightness in assembly.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A push-type children's tricycle includes a main beam and a rear seat tube disposed at the rear end of the main beam. Both the main beam and the rear seat tube are hollow tubes. The rear end of the main beam passes through the middle of the rear seat tube. The upper end of the rear seat tube is provided with a fixed upper cover, and the lower end is provided with a fixed lower cover. A steering device is provided on the rear seat tube. The steering device includes a rear push rod, a rotating upper cover, a synchronous shaft, a rotating shaft, a linkage block, and a rotating lower cover. The rotating upper cover and the rotating lower cover are fixedly connected by bolts, and the rotating upper cover and the rotating lower cover respectively clamp the fixed upper cover and the fixed lower cover in place. The upper and lower ends of the rear seat tube are connected by a rotating shaft rotatably disposed between the upper rotating cover and the lower rotating cover. A linkage block is fixedly disposed on the outer surface of the rotating shaft. Both ends of the linkage block are provided with ear plates. A synchronous shaft is fixedly disposed at the lower end of the rear push rod. The upper end of the rotating shaft is recessed with a first limiting groove. The steering device includes a buckle assembly. During assembly, the rear push rod passes through the upper rotating cover and connects to the synchronous shaft. The synchronous shaft is embedded in the first limiting groove. When the rear push rod is rotated, the synchronous shaft drives the rotating shaft to rotate.

[0006] As a preferred embodiment, the rotating lower cover has a sleeve groove on the side near the rotating upper cover, the inner diameter of the sleeve groove is larger than the outer diameter of the rotating shaft, the bottom of the sleeve groove has a first limiting protrusion, and the lower end of the rotating shaft has a second limiting groove corresponding to the first limiting protrusion; during installation, the lower end of the rotating shaft is embedded in the sleeve groove, and the first limiting protrusion is embedded in the second limiting groove.

[0007] As a preferred embodiment, the outer side wall of the rotating lower cover is provided with a first flange, the inner side wall of the fixed lower cover is provided with a second flange, the diameter of the first flange is larger than the diameter of the second flange, the inner side wall of the fixed upper cover is provided with a third flange, and the rotating upper cover is provided with an abutting portion adapted to the third flange; during assembly, the upper end face of the first flange abuts against the lower end face of the second flange, thereby fixing the fixed lower cover to the lower end of the rear seat tube, and the lower end of the abutting portion abuts against the upper end face of the third flange, thereby fixing the fixed upper cover to the upper end of the rear seat tube.

[0008] As a preferred embodiment, the outer side of the fixed upper cover is provided with a first positioning groove with an opening facing the fixed lower cover, and the outer side of the fixed lower cover is provided with a second positioning groove with an opening facing the fixed upper cover; during assembly, the upper edge of the rear seat tube is embedded in the first positioning groove, and the lower edge of the rear seat tube is embedded in the second positioning groove.

[0009] As a preferred embodiment, both the first positioning groove and the second positioning groove are provided with limiting protrusions, and the upper and lower ends of the rear seat tube are respectively provided with third limiting grooves corresponding to the limiting protrusions.

[0010] As a preferred embodiment, the lower end of the rear push rod is provided with a mounting block, and the synchronous shaft is fixedly mounted on the mounting block; during installation, the outer side wall of the mounting block is interference-fitted with the inner side wall of the rear push rod, and the inner side wall of the mounting block is interference-fitted with the outer side wall of the rotating shaft.

[0011] As a preferred embodiment, the latching assembly includes a latching block, an elastic element, and a pushing block. The lower end of the rear push rod is provided with a first through hole, and the pushing block passes through the first through hole. The rotating upper cover is provided with a second through hole corresponding to the first through hole, and the pushing block is disposed in the second through hole. The pushing block abuts against the latching block. The elastic element is disposed in the rear push rod, and the elastic element causes the latching block to have a tendency to move away from the axis of the rear push rod.

[0012] As a preferred embodiment, the outer wall of the push block is provided with an elastic hook, and the second through hole is provided with a fourth limiting groove corresponding to the elastic hook.

[0013] As a preferred embodiment, the push block includes a pushing part and a pressing part. The pushing part is disposed on the side close to the first through hole, and the diameter of the pushing part is not greater than the diameter of the first through hole, while the cross-sectional area of ​​the pressing part is greater than the diameter of the second through hole.

[0014] As a preferred embodiment, the end of the card block near the push block is hemispherical.

[0015] As a preferred embodiment, the elastic element is a spring sheet, one end of which is connected to the locking block, and the other end of which abuts against the inner wall of the rear push rod. The locking block and the elastic element are integrally formed.

[0016] Compared with the prior art, this utility model has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly features a rotatable upper cover and a lower cover at the upper and lower ends of the rear seat tube. A rotating shaft is provided between the upper and lower covers, and a first limiting groove is provided at the upper end of the rotating shaft. When the rear push rod is inserted into the rear seat tube, the synchronous shaft at the lower end of the rear push rod is embedded in the first limiting groove. Rotating the rear push rod will cause the synchronous shaft to drive the rotating shaft and the linkage block to rotate, thereby turning the front wheel of the push-type children's tricycle. The rear push rod has a synchronous shaft installed on it. When the rear push rod is inserted into the rear seat tube, the synchronous shaft engages with the first limiting groove on the rotating shaft to fix the rear push rod. The installation is quick and convenient, achieving a rapid installation effect. The rotating shaft can move a certain height axially, avoiding the problem of jamming and steering difficulty caused by excessive locking of the rotating shaft by the upper and lower covers, thereby improving the reliability of steering. The rear push rod can be quickly disassembled or installed on the rear seat tube through the buckle assembly, improving the efficiency of disassembly and assembly.

[0017] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the assembly structure of an embodiment of the present utility model;

[0019] Figure 2 This is an exploded structural diagram of the steering device according to an embodiment of the present utility model;

[0020] Figure 3 This is an exploded cross-sectional view of the steering device according to an embodiment of the present invention;

[0021] Figure 4 This is a cross-sectional view of the steering device according to an embodiment of the present utility model;

[0022] Figure 5 This is a cross-sectional view of the steering device according to an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the rotating top cover according to an embodiment of the present utility model;

[0024] Figure 7 This is a schematic diagram of the structure of the push block according to an embodiment of the present invention;

[0025] Figure 8 yes Figure 3 Enlarged diagram of point A in the middle.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100. Main beam;

[0028] 200, Rear seat tube; 210, Third limiting groove;

[0029] 300. Fixed top cover; 310. Third flange; 320. First positioning groove;

[0030] 400. Fixed lower cover; 410. Second flange; 420. Second positioning groove; 430. Limiting protrusion;

[0031] 500. Steering device; 510. Rear push rod; 511. First through hole; 520. Rotating upper cover; 521. Contact part; 522. Second through hole; 523. Fourth limiting groove; 530. Synchronous shaft; 540. Rotating shaft; 541. First limiting groove; 542. Second limiting groove; 550. Linkage block; 551. Ear plate; 560. Rotating lower cover; 561. Sleeve groove; 562. First limiting protrusion; 563. First flange; 570. Mounting block;

[0032] 600, Snap-fit ​​assembly; 610, Snap-fit ​​block; 620, Elastic element; 630, Push block; 631, Elastic hook; 632, Pushing part; 633, Pressing part. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0034] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0035] Please see Figures 1 to 8This utility model provides a push-type children's tricycle, including a main beam 100 and a rear seat tube 200 disposed at the rear end of the main beam 100. Both the main beam 100 and the rear seat tube 200 are hollow tubes. The rear end of the main beam 100 passes through the middle of the rear seat tube 200. The upper end of the rear seat tube 200 is provided with a fixed upper cover 300, and the lower end is provided with a fixed lower cover 400. A steering device 500 is provided on the rear seat tube 200. The steering device 500 includes a rear push rod 510, a rotating upper cover 520, a synchronous shaft 530, a rotating shaft 540, a linkage block 550, and a rotating lower cover 560. The rotating upper cover 520 and the rotating lower cover 560 are fixedly connected by bolts, and the rotating upper cover 520 and the rotating lower cover 560 respectively clamp the fixed upper cover 300 and the fixed lower cover 400 at the upper and lower ends of the rear seat tube 200. The rotating shaft 540 is rotatably disposed between the rotating upper cover 520 and the rotating lower cover 560. Between the movable lower cover 560, the linkage block 550 is fixedly installed on the outer surface of the rotating shaft 540. Both ends of the linkage block 550 away from the axis of the rotating shaft 540 are provided with ear plates 551. Steel cables are fixed on the ear plates 551. The steel cables are connected to the steering mechanism of the front wheel. The linkage block 550 drives the ear plates 551 to rotate, thereby causing the steel cables to drive the steering mechanism of the front wheel to rotate. The synchronous shaft 530 is fixedly installed at the lower end of the rear push rod 510. The upper end of the rotating shaft 540 is recessed with a first limiting groove 541. The steering device 500 includes a buckle assembly 600. During assembly, the rear push rod 510 passes through the rotating upper cover 520 and connects to the synchronous shaft 530. The synchronous shaft 530 is embedded in the first limiting groove 541. When the rear push rod 510 is rotated, the synchronous shaft 530 drives the rotating shaft 540 to rotate, thereby allowing the front wheel of the push-type children's tricycle to be steered.

[0036] Furthermore, the rotating upper cover 520 and rotating lower cover 560 clamp the fixed upper cover 300 and fixed lower cover 400 respectively at the upper and lower ends of the rear seat tube 200. The rotating lower cover 560 has a sleeve groove 561 on the side near the rotating upper cover 520. The inner diameter of the sleeve groove 561 is slightly larger than the outer diameter of the rotating shaft 540. A first limiting protrusion 562 is provided at the bottom of the sleeve groove 561. The lower end of the rotating shaft 540 has a second limiting groove 542 corresponding to the first limiting protrusion 562. During installation, the lower end of the rotating shaft 540 is embedded in the sleeve groove 561, and the first limiting protrusion 562 is embedded in the second limiting groove 542. Thus, the rotating shaft 540 can drive the rotating upper cover 520 and the rotating lower cover 560 to rotate together, avoiding the problem of difficulty in steering caused by the rotating shaft being over-locked by the rotating upper cover and the rotating lower cover.

[0037] Furthermore, the outer wall of the rotating lower cover 560 is provided with an annular first flange 563, and the inner wall of the fixed lower cover 400 is provided with an annular second flange 410. The outer diameter of the first flange 563 is larger than the inner diameter of the second flange 410. The inner wall of the fixed upper cover 300 is provided with an annular third flange 310, and the rotating upper cover 520 is provided with a contact portion 521 that is adapted to the third flange 310. During assembly, the upper end face of the first flange 563 presses against the lower end face of the second flange 410, thereby fixing the fixed lower cover 400 to the lower end of the rear seat tube 200, and the lower end of the contact portion 521 presses against the upper end face of the third flange 310, thereby fixing the fixed upper cover 300 to the upper end of the rear seat tube 200.

[0038] Furthermore, the outer periphery of the fixed upper cover 300 is provided with a first positioning groove 320 with an opening facing the fixed lower cover 400, and the outer periphery of the fixed lower cover 400 is provided with a second positioning groove 420 with an opening facing the fixed upper cover 300; during assembly, the upper edge of the rear seat tube 200 is embedded in the first positioning groove 320, and the lower edge of the rear seat tube 200 is embedded in the second positioning groove 420.

[0039] Furthermore, both the first positioning groove 320 and the second positioning groove 420 are provided with limiting protrusions 430, and the upper and lower ends of the rear seat tube 200 are respectively provided with third limiting grooves 210 corresponding to the limiting protrusions 430, thereby preventing the fixed upper cover 300 and the fixed lower cover 400 from rotating together with the rotating upper cover 520 and the rotating lower cover 560.

[0040] Furthermore, a mounting block 570 is provided inside the lower end of the rear push rod 510, and the synchronous shaft 530 is fixedly mounted on the mounting block 570. During installation, the outer wall of the mounting block 570 is interference-fitted with the inner wall of the rear push rod 510, and the inner wall of the mounting block 570 is interference-fitted with the outer wall of the rotating shaft 540. Through the cooperation of the mounting block 570 and the sleeve groove 561, the rotating shaft 540 can only rotate around its axis.

[0041] Furthermore, the latching assembly 600 is used to detachably install the lower end of the rear push rod 510 into the rear seat tube 200. The latching assembly 600 includes a latching block 610, an elastic element 620, and a pushing block 630. The lower end of the rear push rod 510 is provided with a first through hole 511, and the pushing block 630 passes through the first through hole 511. The rotating upper cover 520 is provided with a second through hole 522 corresponding to the first through hole 511, and the pushing block 630 is disposed in the second through hole 522. The pushing block 630 abuts against the latching block 610. The elastic element 620 is disposed in the rear push rod 510, and the elastic element 620 causes the latching block 610 to have a tendency to move away from the axis of the rear push rod 510. The first through hole 511 is round, and the locking block 610 is cylindrical. The diameter of the first through hole 511 matches the diameter of the locking block 610. When engaged, the locking block 610 passes between the first through hole 511 and the second through hole 522, thereby preventing the rear push rod 510 from moving up and down and fixing the position of the rear push rod 510.

[0042] Furthermore, the outer wall of the push block 630 is provided with an elastic hook 631, and the second through hole 522 is provided with a fourth limiting groove 523 corresponding to the elastic hook 631. The elastic hook 631 and the fourth limiting groove 523 cooperate to prevent the push block 630 from falling out of the second through hole 522 under the push of the locking block 610. There are two elastic hooks 631, which are respectively provided on the corresponding sides of the push block 630. The two elastic hooks 631 tend to move away from each other so that the elastic hooks 631 can be engaged in the fourth limiting groove 523.

[0043] Furthermore, the push block 630 includes a pushing part 632 and a pressing part 633. The pushing part 632 is disposed on the side near the first through hole 511 and abuts against the locking block 610. The diameter of the pushing part 632 is not greater than the diameter of the first through hole 511, and the cross-sectional area of ​​the pressing part 633 is greater than the diameter of the second through hole 522, so as to push the locking block 610 into the rear push rod 510, while restricting the push block 630 from entering the rear push rod 510.

[0044] Furthermore, the end of the locking block 610 near the push block 630 is hemispherical, which facilitates the smooth sliding of the locking block 610 into or out of the second through hole 522 when installing or removing the push rod 510.

[0045] Furthermore, the elastic element 620 is a spring sheet, one end of which is connected to the locking block 610, and the other end is pressed against the inner side wall of the rear push rod 510. The locking block 610 and the elastic element 620 are integrally formed.

[0046] The rear push rod 510 is engaged and fixed with the rotating upper cover 520 by the locking block 610. The rotating upper cover 520 is equipped with a push block 630. The push block 630 achieves quick disassembly of the rear push rod 510 by squeezing the locking block 610 and the elastic element 620.

[0047] As can be seen from the above technical solution, the linkage block 550 on the rotating shaft 540 is synchronously rotated and linked with the front handlebar via a steel cable. The rotating lower cover 560 is engaged and fixed with the rotating shaft 540 through the second limiting groove 542 at the bottom of the rotating shaft 540. The rotating lower cover 560 is fixed with the rotating upper cover 520 by screws, so that the rotating upper cover 520, the rotating shaft 540, and the rotating lower cover 560 can rotate synchronously. The rear push rod 510 is engaged and fixed with the rotating upper cover 520 through the locking block 610. The rotating upper cover 520 contains... There is a push block 630, which can quickly disassemble or install the rear push rod 510 on the rear seat tube 200 by pressing the clamping block 610 and the elastic element 620, thereby improving the disassembly and assembly efficiency; a synchronous shaft 530 is installed on the rear push rod 510, which engages and is fixed with the first limiting groove 541 at the upper end of the rotating shaft 540, but does not restrict the axial movement of the rotating shaft 540, so as to prevent abnormal rotation caused by excessive tightening of the screws of the rotating upper cover 520 and the rotating lower cover 560.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hand-push type children's tricycle, characterized in that: The device includes a main beam (100) and a rear seat tube (200) located at the rear end of the main beam (100). One end of the main beam (100) passes through the middle of the rear seat tube (200). The upper end of the rear seat tube (200) is provided with a fixed upper cover (300), and the lower end is provided with a fixed lower cover (400). The rear seat tube (200) is provided with a steering device (500). The steering device (500) includes a rear push rod (510), a rotating upper cover (520), a synchronous shaft (530), a rotating shaft (540), and a rotating lower cover (560). The rotating upper cover (520) and the rotating lower cover (560) are fixedly connected. The rotating shaft (540) is located at the upper end of the rotating lower cover (560). The outer surface of the rotating shaft (540) is provided with a linkage block (550), and both ends of the linkage block (550) are provided with ear plates (551). The synchronous shaft (530) is fixedly installed at the lower end of the rear push rod (510). The upper end of the rotating shaft (540) is recessed with a first limiting groove (541). The steering device (500) includes a buckle assembly (600). During assembly, the rear push rod (510) passes through the rotating upper cover (520) and connects to the synchronous shaft (530). The synchronous shaft (530) is embedded in the first limiting groove (541). When the rear push rod (510) is rotated, the synchronous shaft (530) drives the rotating shaft (540) to rotate.

2. The hand-push children's tricycle according to claim 1, characterized in that: The rotating lower cover (560) has a sleeve groove (561) on the side near the rotating upper cover (520). The inner diameter of the sleeve groove (561) is larger than the outer diameter of the rotating shaft (540). A first limiting protrusion (562) is provided at the bottom of the sleeve groove (561). The lower end of the rotating shaft (540) is provided with a second limiting groove (542) corresponding to the first limiting protrusion (562). During installation, the lower end of the rotating shaft (540) is embedded in the sleeve groove (561), and the first limiting protrusion (562) is embedded in the second limiting groove (542).

3. The hand-push children's tricycle according to claim 1, characterized in that: The outer side wall of the rotating lower cover (560) is provided with a first flange (563), the inner side wall of the fixed lower cover (400) is provided with a second flange (410), the outer diameter of the first flange (563) is larger than the inner diameter of the second flange (410), the inner side wall of the fixed upper cover (300) is provided with a third flange (310), and the rotating upper cover (520) is provided with an abutting part (521) adapted to the third flange (310).

4. The hand-push children's tricycle according to claim 1, characterized in that: The outer side of the fixed upper cover (300) is provided with a first positioning groove (320) with an opening facing the fixed lower cover (400), and the outer side of the fixed lower cover (400) is provided with a second positioning groove (420) with an opening facing the fixed upper cover (300); during assembly, the upper edge of the rear seat tube (200) is embedded in the first positioning groove (320), and the lower edge of the rear seat tube (200) is embedded in the second positioning groove (420).

5. The hand-push children's tricycle according to claim 4, characterized in that: Both the first positioning groove (320) and the second positioning groove (420) are provided with limiting protrusions (430), and the upper and lower ends of the rear seat tube (200) are respectively provided with third limiting grooves (210) corresponding to the limiting protrusions (430).

6. The hand-push children's tricycle according to claim 1, characterized in that: The lower end of the rear push rod (510) is provided with a mounting block (570), and the synchronous shaft (530) is fixedly mounted on the mounting block (570).

7. The hand-push children's tricycle according to claim 1, characterized in that: The latching assembly (600) includes a latching block (610), an elastic element (620), and a pushing block (630). The lower end of the rear push rod (510) is provided with a first through hole (511). The pushing block (630) passes through the first through hole (511). The rotating upper cover (520) is provided with a second through hole (522) corresponding to the first through hole (511). The pushing block (630) is disposed in the second through hole (522). The pushing block (630) is in contact with the latching block (610). The elastic element (620) is disposed in the rear push rod (510), and the elastic element (620) causes the latching block (610) to have a tendency to move away from the axis of the rear push rod (510).

8. The hand-push children's tricycle according to claim 7, characterized in that: The outer wall of the push block (630) is provided with an elastic hook (631), and the second through hole (522) is provided with a fourth limiting groove (523) corresponding to the elastic hook (631).

9. The hand-push children's tricycle according to claim 7, characterized in that: The push block (630) includes a pushing part (632) and a pressing part (633). The pushing part (632) is disposed on the side close to the first through hole (511), and the diameter of the pushing part (632) is not greater than the diameter of the first through hole (511). The cross-sectional area of ​​the pressing part (633) is greater than the diameter of the second through hole (522).

10. The hand-push children's tricycle according to claim 7, characterized in that: The locking block (610) is hemispherical at one end near the pushing block (630). The elastic element (620) is a spring sheet. One end of the spring sheet is connected to the locking block (610), and the other end presses against the inner wall of the rear push rod (510). The locking block (610) and the elastic element (620) are integrally formed.

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