High-strength buggy brake rod
By combining the inner core and outer bushing design with a limiting structure, the problem of easy bending of the brake lever in children's vehicles has been solved, achieving high strength and convenient replacement, and reducing the cost of use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2026-03-17
AI Technical Summary
Existing children's stroller brake levers are prone to lateral bending after prolonged use, resulting in low strength, which affects the braking stroke and leads to high replacement costs.
The vertical tie rod structure adopts an inner core and outer bushing combination design. The threaded groove and lower external thread facilitate the installation and disassembly of the elbow tie rod and the vertical tie rod. The fixed boss and the moving boss provide a limiting range for the spring to prevent the spring from bending and rubbing against the outer bushing.
It improves the lateral bending resistance of the brake lever, extends its service life, reduces the cost of replacing parts, increases the convenience of replacement, and protects the service life of the spring.
Smart Images
Figure CN223999705U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of brake lever technology, specifically a high-strength brake lever for children's vehicles. Background Technology
[0002] The brake lever, also known as the handbrake, is used to prevent the vehicle from rolling backward when parking. The professional name for the handbrake is the auxiliary brake. It works on a different principle than the main brake. It uses a steel cable connected to the rear brake shoes to brake the vehicle. To ensure the safety of children's strollers during use, a brake lever needs to be installed on the stroller to ensure its stability after parking.
[0003] The published patent document CN214029029U discloses a brake lever assembly. This patent document facilitates the adjustment of the effective length of the lever by setting an adjustment device, and the protective sleeve can effectively protect the external threads on the lever from rusting and locking, making the adjustment of the effective length of the lever convenient and quick, easy to maintain, and ensuring stable and reliable force transmission to guarantee safe driving. However, over a long period of time, due to the long vertical part of the lever, it is prone to lateral bending, resulting in low strength. Furthermore, the deformation of the lever bend after long-term use affects the brake stroke, requiring the replacement of the entire lever, thus increasing the cost of use. Utility Model Content
[0004] The purpose of this invention is to provide a high-strength brake lever for children's vehicles, which solves the problems mentioned in the background art.
[0005] This application provides a high-strength child bicycle brake lever, including a vertical pull rod and a curved pull rod. The vertical pull rod includes an inner core and an outer bushing. The outer wall of the inner core is integrally cast with four protrusions at equal intervals. The outer bushing is fitted onto the inner core and is thermally fused to the inner core. The lower outer wall of the outer bushing is provided with a lower external thread. The top of the curved pull rod is provided with a threaded groove. The lower end of the outer bushing is located inside the threaded groove, and the lower external thread is adapted to the threaded groove.
[0006] By adopting the above technical solution, the design of the inner core and outer bushing combined to form a vertical tie rod increases the lateral bending resistance of the vertical tie rod, ensuring the high strength of the brake rod. The threaded groove and the lower external thread facilitate the installation and disassembly between the elbow tie rod and the vertical tie rod, thereby facilitating the replacement of the elbow tie rod and making it easier to replace the elbow tie rod after it has been deformed for a long time.
[0007] Optionally, the outer bushing is fitted with a fixed boss, a movable boss, and a spring. The fixed boss is fixedly connected to the outer bushing, the movable boss is slidably connected to the outer bushing, and the spring is located between the fixed boss and the movable boss. The top of the fixed boss has a lower spring annular groove that matches the spring, and the bottom of the movable boss has an upper spring annular groove that matches the spring. The lower end of the spring is inside the lower spring annular groove, and the upper end of the spring is inside the upper spring annular groove.
[0008] By adopting the above technical solution, the lower spring annular groove of the fixed boss and the upper spring annular groove of the movable boss provide a limiting range for the two ends of the spring, preventing the spring from bending and rubbing against the outer bushing, thus ensuring the service life of the spring.
[0009] Optionally, the upper outer wall of the outer bushing is provided with an upper external thread, and a T-shaped fitting, a nut one, and a nut two are respectively fitted on the upper side of the outer bushing. The T-shaped fitting is connected to the outer bushing with a clearance fit, and the nut one and nut two are adapted to the upper external thread.
[0010] By adopting the above technical solution, the double nut design of nut one and nut two ensures the stability of the T-type kit installation.
[0011] Optionally, a matching gasket is provided between the nut and the T-shaped kit.
[0012] By adopting the above technical solution, friction between the nut and the T-shaped kit is prevented.
[0013] Optionally, the elbow tie rod is provided with a mounting hole.
[0014] By adopting the above technical solution, mounting hole one makes it easy to connect the elbow tie rod to the brake of the child stroller.
[0015] Optionally, the T-shaped kit has two mounting holes.
[0016] By adopting the above technical solution, mounting hole two facilitates the connection between the vertical tie rod and the brake handle.
[0017] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:
[0018] 1. The technical solution of this application uses the design of inner core and outer bushing combined to form a vertical tie rod, which increases the lateral bending resistance of the vertical tie rod and ensures the high strength of the brake rod. The threaded groove and lower external thread facilitate the installation and disassembly between the elbow tie rod and the vertical tie rod, thereby facilitating the replacement of the elbow tie rod. This makes it easy to replace the elbow tie rod after it has been deformed for a long time, which can reduce the cost of use and increase the convenience of replacing parts.
[0019] 2. The technical solution of this application provides a limiting range for the two ends of the spring through the lower spring annular groove of the fixed boss and the upper spring annular groove of the movable boss, so as to prevent the spring from bending and rubbing against the outer bushing, and to ensure the service life of the spring. Attached Figure Description
[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0021] Figure 1 This is a schematic diagram of the structure of the present invention from the front view.
[0022] Figure 2 This is a schematic diagram of the main structure of the elbow tie rod of this utility model;
[0023] Figure 3 This utility model Figure 1 Enlarged view of point A in the middle;
[0024] Figure 4 This is a schematic diagram of the main structure of the fixed boss of this utility model;
[0025] Figure 5 This is a structural schematic diagram of the moving boss of this utility model viewed from below.
[0026] In the diagram: 1. Vertical tie rod; 11. Inner core; 12. Protrusion; 13. Outer bushing; 14. Lower external thread; 15. Upper external thread; 2. Elbow tie rod; 21. Threaded groove; 22. Mounting hole one; 3. T-shaped fitting; 31. Nut one; 32. Nut two; 33. Washer; 34. Mounting hole two; 4. Fixed boss; 41. Lower spring annular groove; 5. Moving boss; 51. Upper spring annular groove; 6. Spring. Detailed Implementation
[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0028] Please see Figure 1-2This utility model provides a high-strength children's bicycle brake lever, including a vertical pull rod 1 and a bent pull rod 2. The vertical pull rod 1 includes an inner core 11 and an outer bushing 13. The outer wall of the inner core 11 is integrally cast with four protrusions 12 at equal intervals. The outer bushing 13 is sleeved on the inner core 11 and is heat-fused to the inner core 11. The lower outer wall of the outer bushing 13 is provided with a lower external thread 14. The top of the bent pull rod 2 is provided with a threaded groove 21. The lower end of the outer bushing 13 is inside the threaded groove 21, and the lower external thread 14 is adapted to the threaded groove 21.
[0029] In this technical solution, the design of the vertical tie rod 1 formed by the inner core 11 and the outer bushing 13 increases the lateral bending resistance of the vertical tie rod 1, ensuring the high strength of the brake lever. The threaded groove 21 and the lower external thread 14 facilitate the installation and disassembly between the elbow tie rod 2 and the vertical tie rod 1, thereby facilitating the replacement of the elbow tie rod 2. This makes it easier to replace the elbow tie rod 2 after it deforms due to long-term use, reducing usage costs and increasing the convenience of replacing parts.
[0030] In some technical solutions, such as Figure 1 , Figure 4 and Figure 5 As shown, a fixed boss 4, a movable boss 5, and a spring 6 are fitted on the outer bushing 13. The fixed boss 4 is fixedly connected to the outer bushing 13, and the movable boss 5 is slidably connected to the outer bushing 13. The spring 6 is located between the fixed boss 4 and the movable boss 5. The top of the fixed boss 4 is provided with a lower spring annular groove 41 that matches the spring 6, and the bottom of the movable boss 5 is provided with an upper spring annular groove 51 that matches the spring 6. The lower end of the spring 6 is located inside the lower spring annular groove 41, and the upper end of the spring 6 is located inside the upper spring annular groove 51.
[0031] In use, the lower spring annular groove 41 of the fixed boss 4 and the upper spring annular groove 51 of the movable boss 5 provide a limiting range for the two ends of the spring 6, preventing the spring 6 from bending and rubbing against the outer bushing 13, thus ensuring the service life of the spring 6.
[0032] In some technical solutions, such as Figure 1 and Figure 3 As shown, the upper outer wall of the outer bushing 13 is provided with an upper external thread 15, and the upper side of the outer bushing 13 is respectively fitted with a T-shaped kit 3, a nut 1 31 and a nut 2 32. The T-shaped kit 3 is connected to the outer bushing 13 with a clearance fit, and the nut 1 31 and the nut 2 32 are adapted to the upper external thread 15.
[0033] When in use, the double nut design of nut 31 and nut 32 ensures the stability of the T-type kit 3 during installation.
[0034] In some technical solutions, such as Figure 3As shown, a matching washer 33 is provided between the nut 31 and the T-shaped kit 3.
[0035] During use, the gasket 33 prevents friction between the nut 31 and the T-shaped kit 3.
[0036] In some technical solutions, such as Figure 1 As shown, the elbow tie rod 2 has a mounting hole 22.
[0037] When in use, the elbow rod 2 can be easily connected to the brake of the stroller through mounting hole 22.
[0038] In some technical solutions, such as Figure 1 As shown, the T-shaped kit 3 has two mounting holes 34.
[0039] In use, the vertical tie rod 1 can be easily connected to the brake handle through mounting hole 2 34.
[0040] Working principle: The inner core 11 and the outer bushing 13 are combined to form the vertical tie rod 1, which increases the lateral bending resistance of the vertical tie rod 1. The threaded groove 21 and the lower external thread 14 facilitate the installation and disassembly of the elbow tie rod 2 and the vertical tie rod 1, thereby facilitating the replacement of the elbow tie rod 2. This makes it easy to replace the elbow tie rod 2 after it has been deformed due to long-term use. The lower spring annular groove 41 of the fixed boss 4 and the upper spring annular groove 51 of the moving boss 5 provide a limiting range for the two ends of the spring 6, preventing the spring 6 from bending and rubbing against the outer bushing 13.
[0041] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. High-strength brake lever for children's vehicles, comprising a vertical pull rod (1) and an elbow pull rod (2), characterized in that: The vertical pull rod (1) comprises an inner core (11) and an outer sleeve (13), four protrusions (12) are integrally formed on the outer wall of the inner core (11) at equal intervals, the outer sleeve (13) is sleeved on the inner core (11), and the outer sleeve (13) is hot-melt connected with the inner core (11), the lower outer wall of the outer sleeve (13) is provided with a lower outer thread (14), the top of the elbow pull rod (2) is provided with a threaded groove (21), the lower end of the outer sleeve (13) is located in the threaded groove (21), and the lower outer thread (14) is matched with the threaded groove (21).
2. The high strength child vehicle brake lever of claim 1, wherein, The outer sleeve (13) is sleeved with a fixed boss (4), a movable boss (5) and a spring (6), the fixed boss (4) is fixedly connected with the outer sleeve (13), the movable boss (5) is slidably connected with the outer sleeve (13), the spring (6) is located between the fixed boss (4) and the movable boss (5), the top of the fixed boss (4) is provided with a lower spring annular groove (41) matched with the spring (6), the bottom of the movable boss (5) is provided with an upper spring annular groove (51) matched with the spring (6), the lower end of the spring (6) is located in the lower spring annular groove (41), and the upper end of the spring (6) is located in the upper spring annular groove (51).
3. The high strength child vehicle brake lever of claim 1, wherein, The upper outer wall of the outer sleeve (13) is provided with an upper outer thread (15), and the upper side of the outer sleeve (13) is respectively sleeved with a T-shaped sleeve (3), a cap one (31) and a cap two (32), the T-shaped sleeve (3) is connected with the outer sleeve (13) in a clearance fit, and the cap one (31) and the cap two (32) are matched with the upper outer thread (15).
4. The high strength child vehicle brake lever of claim 3, wherein, A matching gasket (33) is arranged between the cap one (31) and the T-shaped sleeve (3).
5. The high strength child vehicle brake lever of claim 1, wherein, The elbow pull rod (2) is provided with a mounting hole one (22).
6. The high strength child vehicle brake lever of claim 3, wherein, The T-shaped sleeve (3) is provided with two mounting hole twos (34). The T-shaped sleeve (3) is provided with two mounting hole twos (34).