Push-pull lever shift mechanism

Abstract

This utility model relates to a push-pull rod shifting mechanism, including a foot shifting pedal and an engine. The foot shifting pedal is hinged to one end of a front pull rod and secured with a nut. A front connector mounted on the other end of the front pull rod is movably connected to one end of a brake rocker arm. The other end of the brake rocker arm is hinged to a rear connector, which is fixedly mounted on one end of a rear pull rod. The rear pull rod is fixedly connected to a rocker arm assembly. The middle part of the brake rocker arm is mounted to the vehicle frame via a pivot. This utility model, through the push-pull rod mechanism of the front pull rod, brake rocker arm, and rear pull rod, can effectively transmit push-pull forces, increasing the force on the shifting rocker arm and resulting in smooth and clear shifting. The direct connection of the push-pull rod, combined with the self-resetting of the engine shifting arm and the tension spring of the shifting rocker arm, ensures smooth and timely shifting reset. The unequal arm lever structure of the shifting rocker arm can change the shifting stroke of the foot shifting pedal. Through the design of the power arm and resistance arm of the shifting rocker arm, a reasonable design of the shifting stroke of the foot shifting pedal can be achieved.

Description

Technical Field

[0001] This utility model relates to a push-pull rod shifting mechanism, specifically a push-pull rod shifting mechanism. Background Technology

[0002] In the three-wheeled motorcycle industry, the foot shift mechanism of rear-engine three-wheeled motorcycles is commonly a cable type. The cable connects the foot shift pedal to the engine shift arm, and the cable transmits push and pull forces, causing the shift arm to swing back and forth, thus shifting gears. Due to its simple structure and ease of installation, it is widely used.

[0003] The distance between the engine and the gear shift pedal is large, resulting in a long cable. This leads to uneven force transmission during gear shifting, causing unclear shifting and downshifting, and making the pedal prone to jamming. The excessive travel of the gear shift pedal further exacerbates the problem. The cable's winding path causes friction between the core wire and the outer sheath under pressure, resulting in poor gear shift reset. Overall, the performance is unsatisfactory. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a push-pull lever gear shifting mechanism, which enables smooth and clear gear shifting and has a short shifting stroke for the foot shifting pedal, effectively improving gear shifting comfort.

[0005] To achieve the above objectives, this utility model provides a push-pull lever shifting mechanism, including a foot shifting pedal, a nut, a front tie rod, tension spring adjusting rods, a frame, and an engine. The foot shifting pedal is hinged to one end of the front tie rod and secured with a nut. A front connector mounted on the other end of the front tie rod is movably connected to one end of a brake rocker arm. The other end of the brake rocker arm is hinged to a rear connector, which is fixedly mounted on one end of a rear tie rod. The rear tie rod is fixedly connected to a swing arm assembly. The middle part of the brake rocker arm is mounted to the frame via a pivot. Two tension spring adjusting rods are mounted on the frame on the side of the brake rocker arm facing the foot shifting pedal. Tension springs at one end of each of the two adjusting rods are respectively connected to the brake rocker arm near its end. The swing arm assembly is mounted to the engine's shifting output shaft.

[0006] In addition, the push-pull rod shifting mechanism proposed in the above embodiments of this utility model may also have the following additional technical features:

[0007] As a further improvement of this utility model, the front tie rod is threaded to connect to the front connector.

[0008] As a further improvement of this utility model, the two ends of the rear pull rod are respectively threaded to the rear connector and the swing arm assembly.

[0009] As a further improvement of this utility model, the tension spring is hung on the brake rocker arm by a hook.

[0010] As a further improvement of this utility model, the frame is connected to the tension spring adjusting rod via an adjusting rod fixing plate.

[0011] By employing the above-described scheme, this utility model possesses at least the following advantages: The push-pull rod mechanism, consisting of a front pull rod, brake rocker arm, and rear pull rod, effectively transmits push-pull forces, increasing the force applied to the shift arm and resulting in smooth and clear shifting. The direct connection of the push-pull rods, combined with the self-resetting mechanism of the engine shift arm and the shift arm tension spring, ensures smooth and timely shift reset. The unequal-arm lever structure of the shift arm allows for alteration of the shifting stroke of the foot shift pedal; the design of the power arm and resistance arm of the shift arm enables a rational design of the foot shift pedal's shifting stroke. Attached Figure Description

[0012] Figure 1 This is a side view of the push-pull lever shifting mechanism;

[0013] Figure 2 This is a top view of the push-pull lever shifting mechanism;

[0014] Figure 3 This is a bottom view of the push-pull lever shifting mechanism mounted on the vehicle frame;

[0015] Figure 4 This is a side view of the push-pull lever shift mechanism mounted on the vehicle frame;

[0016] In the picture: 1. Foot shift pedal, 2. Nut, 3. Front tie rod, 4. Tension spring adjusting rod, 5. Tension spring, 6. Front connector, 7. Brake rocker arm, 8. Rear connector, 9. Rear tie rod, 10. Swing arm assembly, 11. Frame, 12. Engine. Detailed Implementation

[0017] The push-pull rod shifting mechanism of this utility model is described below with reference to the accompanying drawings.

[0018] In Embodiment 1 of this application, as Figures 1 to 3As shown, this push-pull lever shifting mechanism (hereinafter referred to as "the present invention") includes a foot shifting pedal 1, a nut 2, a front pull rod 3, a tension spring adjusting rod 4, a tension spring 5, a front connector 6, a brake rocker arm 7, a rear connector 8, a rear pull rod 9, a swing arm assembly 10, a frame 11, and an engine 12. The foot shifting pedal 1 is hinged to one end of the front pull rod 3 and secured by the nut 2. The front connector 6 installed at the other end of the front pull rod 3 is movably connected to one end of the brake rocker arm 7. The other end of the brake rocker arm 7 is hinged to the rear connector 8. The rear connector 8 is fixedly installed at one end of the rear pull rod 9. The rear pull rod 9 is fixedly connected to the swing arm assembly 10. The middle part of the brake rocker arm 7 is mounted to the frame 11 via a pivot. Two tension spring adjusting rods 4 are installed on the frame on the side of the brake rocker arm 7 facing the foot shifting pedal 1. The tension springs 5 ​​at one end of the two tension spring adjusting rods 4 are respectively connected to the position of the brake rocker arm 7 near the end. The swing arm assembly 10 is mounted on the shifting output shaft of the engine 12.

[0019] To further optimize the working efficiency of this application, allow the equipment to adapt to more vehicle models, and enable timely adjustment of the overall length of the front and rear tie rods and front and rear connectors as needed, the front tie rod 3 is threadedly connected to the front connector 6. The rear tie rod 9 is threadedly connected at both ends to the rear connector 8 and the swing arm assembly 10, respectively. To reduce production costs and ensure convenient maintenance, the tension spring 5 is hung on the brake swing arm 7 via a hook. The frame 11 is connected to the tension spring adjusting rod 4 via an adjusting rod fixing plate.

[0020] In use, the push-pull lever shifting mechanism is installed, the foot shifter pedal 1 is installed at the foot shifter mounting position on the frame 11, the brake rocker arm 7 is installed on the brake rocker arm fixing shaft of the frame 11, the rocker arm assembly 10 is installed on the shifting output shaft of the engine 12, and the tension spring adjusting rod 4 is installed on the adjusting rod fixing plate of the frame 11. The tension of the tension spring 5 is adjusted by adjusting the position of the tension spring adjusting rod 4 to ensure that there is no shaking or abnormal noise at the brake rocker arm 7, while also enhancing the reset effect of the foot shifter pedal 1. By changing the installation depth of the front connector 6 and the front tie rod 3, and the installation depth of the rear connector 8 and the rear tie rod 9, the installation distance of the front tie rod 3 and the rear tie rod 9 can be adjusted, thereby adjusting the posture of the foot shifter pedal 1. Through the leverage of the foot shifter pedal 1 and the brake rocker arm 7, the action of the foot shifter pedal 1 is ensured to be consistent with the upshifting and downshifting actions of the engine 12.

[0021] When this utility model is used, its specific operation is as follows:

[0022] In use, the driver controls the Y-shaped shift pedal 1 with his foot. The shift pedal 1 swings back and forth around its central pivot. The lower end of the shift pedal 1 drives the front lever 3, which in turn drives the two ends of the brake rocker arm 7 to swing. The rear connector 8, rear lever 9, and rocker arm assembly 10, which are hinged to the end of the brake rocker arm 7, drive the shift shaft of the engine 12. Through the leverage of the shift pedal 1 and the brake rocker arm 7, the movement of the shift pedal 1 is ensured to be consistent with the upshifting and downshifting movements of the engine 12.

[0023] In summary, the push-pull lever shifting mechanism of this utility model embodiment, through the push-pull lever method of the front pull rod 3, brake rocker arm 7, and rear pull rod 9, can effectively transmit push-pull force, improve the force on the shifting rocker arm, and ensure smooth and clear shifting. The direct connection of the push-pull lever, combined with the self-resetting of the engine shifting arm and the tension spring of the shifting rocker arm, ensures smooth and timely shifting reset. The unequal arm lever structure of the shifting rocker arm can change the shifting stroke of the foot shifting pedal. Through the design of the power arm and resistance arm of the shifting rocker arm, a reasonable design of the shifting stroke of the foot shifting pedal can be achieved.

[0024] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A push-pull lever gear shifting mechanism, comprising a foot shift pedal (1), a frame (11), and an engine (12), characterized in that, The foot shift pedal (1) is hinged to one end of the front pull rod (3) and fastened with a nut (2). The front connector (6) installed at the other end of the front pull rod (3) is movably connected to one end of the brake rocker arm (7). The other end of the brake rocker arm (7) is hinged to the rear connector (8). The rear connector (8) is fixedly installed at one end of the rear pull rod (9). The rear pull rod (9) is fixedly connected to the swing arm assembly (10). The middle part of the brake rocker arm (7) is installed to the frame (11) through a pivot. Two tension spring adjusting rods (4) are installed on the frame on the side of the brake rocker arm (7) facing the foot shift pedal (1). The tension springs (5) at one end of the two tension spring adjusting rods (4) are respectively connected to the position of the brake rocker arm (7) near the end. The swing arm assembly (10) is installed on the shift output shaft of the engine (12).

2. The push-pull rod shifting mechanism according to claim 1, characterized in that, The aforementioned front tie rod (3) is threadedly connected to the front connector (6).

3. The push-pull rod shifting mechanism according to claim 2, characterized in that, The rear tie rod (9) is threaded to the rear connector (8) and the swing arm assembly (10) at both ends.

4. The push-pull rod shifting mechanism according to claim 1, characterized in that, The tension spring (5) is attached to the brake rocker arm (7) by a hook.

5. The push-pull rod shifting mechanism according to claim 4, characterized in that, The frame (11) is connected to the tension spring adjusting rod (4) via the adjusting rod fixing plate.

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