Gear shifting mechanism with CVT engine

Abstract

A gear shifting mechanism matched with a CVT engine comprises a gear shifting arm, a gear shifting head is connected to the top of the gear shifting arm, a first wheel disc is fixed to the bottom of the gear shifting arm, a reset structure is arranged at the outer side end of the first wheel disc, and a second wheel disc is wound around the outer ring of the first wheel disc. The gear shifting arm controls the first wheel disc to drive the second wheel disc to synchronously axially move and radially rotate to form a gear shifting control structure for controlling the gear selecting and shifting shaft to axially move and radially rotate, and the diameter of the first wheel disc is larger than that of the second wheel disc. The connecting rod mechanism is reasonable and compact in structure, and the problem that a connecting rod mechanism for gear shifting of a traditional engine is difficult to arrange is effectively solved through the transmission design of transmission of the large wheel disc, the small wheel disc and the flexible shaft; excellent compatibility and wide applicability are achieved, and the complex, diverse and extremely strict gear shifting requirements of common CVT engines in the market can be met; by means of the length-adjustable flexible shaft conduction design, the gear shifting comfort level is remarkably improved, meanwhile, the use requirements of spaces of different sizes are effectively met, and the excellent structure and performance advantages are shown.

Description

Technical Field

[0001] The utility model relates to the technical field of power, in particular to an engine, specifically a shift mechanism equipped with a CVT engine. Background Art

[0002] Currently, traditional ATV engine shift mechanisms mostly utilize connecting rods and foot-operated levers. Connecting rod shift mechanisms are often uncomfortable to use, and foot-operated levers require more space and installation angles, taking up additional space and increasing the difficulty of structural layout. Furthermore, while ATV engines can enhance the driving experience, the complex structure of the shift mechanism and other components makes subsequent maintenance more difficult.

[0003] The CVT engine can achieve stepless power transmission, making the acceleration process smoother and improving fuel utilization. The CVT engine is suitable for drivers who focus on economy and comfort. Compared with the ATV engine and its shifting mechanism, the CVT engine can be combined with a new shifting mechanism to achieve the purpose of meeting comfort requirements while reducing structural complexity and streamlining space. Utility Model Content

[0004] The present invention aims to solve the problems existing in the above-mentioned prior art and provide a shift mechanism equipped with a CVT engine to solve the problems that the current traditional ATV engine shift mechanism has poor comfort in use and has relatively high requirements for space and installation angle, and meet the needs of easy control of the shift mechanism and streamlined space.

[0005] The utility model adopts a technical solution to solve its technical problems: this shift mechanism equipped with a CVT engine includes a shift arm, a shift head is connected to the top of the shift arm, a first wheel that can rotate and move axially is fixed to the bottom of the shift arm, the outer end of the first wheel is provided with a reset structure to return the first wheel to an initial position, the outer ring of the first wheel is wrapped with a soft shaft and is connected to a second wheel fixedly connected to the outer end of the engine's gear selection and shift shaft through the soft shaft transmission, the shift arm controls the first wheel to drive the second wheel to synchronously move axially and rotate radially to form a shift control structure in which the shift arm controls the axial movement and radial rotation of the gear selection and shift shaft, and the diameter of the first wheel is larger than that of the second wheel. After this arrangement, when the shift head is operated, the shift arm synchronously drives the first wheel to rotate or move axially, and the first wheel uses the flexible shaft to synchronously drive the second wheel to rotate or move axially again, forming a structure for the shift head to control the movement of the second wheel. Since the second wheel and the gear selection and shift shaft are fixed, the shift arm finally achieves the control effect of controlling the axial movement and radial rotation of the gear selection and shift shaft. Compared with the connecting rod mechanism, the overall structure effectively improves the flexibility and adaptability of the first and second wheels with the adjustable length of the flexible shaft, effectively meets the diverse usage needs of spaces of different sizes, solves the problem of difficult gear shifting layout of traditional engines, and has good use effect.

[0006] As a further improvement to the present invention, the first and second discs are respectively secured to the engine via a mounting plate and a mounting bracket. An optical axis is secured to the mounting plate, and the first disc is mounted on the optical axis. A reset mechanism includes a return spring sleeved around the optical axis, with a return spring pressure plate connected to the outer end of the optical axis. One end of the return spring presses against the first disc, positioning it in its initial position against the mounting plate, while the other end of the return spring presses against the return spring pressure plate. The return spring serves to reset the shift arm after movement. Regardless of the shift arm's position, the return spring allows the shift arm to readily shift to the next gear, ensuring fast and accurate shifting.

[0007] As a further improvement to the present invention, the flexible shaft begins at the top of the first disc, closely adhering to the outer ring, and exits from the bottom, forming a cross-shaped structure on the outside of the first disc. This arrangement allows for a tighter and more secure winding between the flexible shaft and the first disc, further enhancing transmission efficiency.

[0008] As a further improvement to the present invention, a second wheel disc is detachably fixedly connected to the outer end of the gear select and shift shaft. The center hole of the second wheel disc meshes with the outer end of the gear select and shift shaft. The second wheel disc is provided with a V-shaped opening groove that runs through the front and back and communicates with the center hole. The second wheel disc is connected to the left and right sides of the V-shaped opening groove and tightened to the outer end of the gear select and shift shaft using screws. With this arrangement, the second wheel disc can adapt to gear select and shift shafts of different diameters using the V-shaped opening groove. After the second wheel disc is connected to the end of the gear select and shift shaft, the left and right sides of the V-shaped opening groove are connected and tightened using screws to achieve a connection effect. Furthermore, the meshing connection between the center hole of the second wheel disc and the outer end of the gear select and shift shaft ensures a transmission connection effect between the two. Since the meshing connection does not generate friction, the purpose of synchronous transmission is achieved, ensuring a transmission connection effect.

[0009] As a further improvement to the present invention, grooves are provided at the outer ends of the first and second discs to accommodate the flexible shaft. This arrangement provides for more stable and reliable transmission between the first and second discs via the flexible shaft, as the flexible shaft moves only within the groove without deflection, resulting in a more accurate and timely transmission relationship between the first and second discs.

[0010] As a further improvement to the present invention, both the mounting plate and the mounting bracket are provided with clips. The clips on the mounting plate are arranged vertically so that the flexible shaft intersects vertically and interlocks within the clips, forming a cross-shaped structure on the outside of the first wheel. The clips on the mounting bracket are arranged horizontally and parallel to each other so that the flexible shaft passes parallel to the second wheel. The clips are used to fix the flexible shaft in a cross-shaped structure on the outside of the first wheel, while the clips on the second wheel parallelize the flexible shaft. This tightens the flexible shaft and improves the transmission effect. Most importantly, directly fixing the flexible shaft to the wheel does not require additional space or structure to fix the flexible shaft, effectively streamlining the structure and space.

[0011] The beneficial effects of the present invention are: the structure of the present invention is reasonable and compact, and the transmission design of large and small wheels and flexible shaft transmission is adopted, which effectively solves the problem of difficult layout caused by the angle and space limitations of the connecting rod mechanism of traditional engine shifting; the large and small wheel design has excellent compatibility and wide applicability and can meet the complex, diverse and extremely stringent shifting requirements of common CVT engines on the market; the flexible shaft transmission design with adjustable length, while significantly improving the shifting comfort, effectively meets the diverse usage requirements of spaces of different sizes with its excellent flexibility and adaptability, and demonstrates excellent structural and performance advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 It is a right side view of the utility model;

[0014] Figure 3 It is a front view of the utility model.

[0015] Explanation of the reference numerals: shift arm 1 , shift head 2 , first wheel disc 3 , flexible shaft 4 , gear selection and shift shaft 5 , second wheel disc 6 , mounting plate 7 , mounting bracket 8 , return spring 9 , return spring pressure plate 10 , screw 11 , buckle 12 . DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings:

[0017] Referring to the accompanying drawings: the shift mechanism equipped with a CVT engine in this embodiment includes a shift arm 1, a shift head 2 is connected to the top of the shift arm 1, a first wheel 3 that can rotate and move axially is fixed to the bottom of the shift arm 1, and the outer end of the first wheel 3 is provided with a reset structure to return the first wheel 3 to the initial position. The outer ring of the first wheel 3 is wrapped with a soft shaft 4 and is connected to the second wheel 6 fixedly connected to the outer end of the engine's gear selection and shift shaft 5 through the soft shaft 4. The shift arm 1 controls the first wheel 3 to drive the second wheel 6 to synchronously move axially and rotate radially to form a shift control structure in which the shift arm 1 controls the axial movement and radial rotation of the gear selection and shift shaft 5. The diameter of the first wheel 3 is larger than that of the second wheel 6.

[0018] The first wheel disc 3 and the second wheel disc 6 are fixed to the engine through the mounting plate 7 and the mounting bracket 8 respectively. The mounting plate 7 is fixed with an optical axis, and the first wheel disc 3 is mounted on the optical axis. The reset structure includes a reset spring 9 sleeved on the optical axis, and the outer end of the optical axis is connected to the reset spring pressure plate 10. One end of the reset spring 9 presses on the first wheel disc 3 to make it located in the initial position close to the mounting plate 7, and the other end of the reset spring 9 presses on the reset spring pressure plate 10.

[0019] The flexible shaft 4 starts from the upper side of the first wheel disc 3 and is closely attached to the outer ring and passes through the lower side to form a cross-shaped structure of the flexible shaft 4 outside the first wheel disc 3.

[0020] The second wheel disc 6 is detachably fixedly connected to the outer end of the gear selection and shift shaft 5. The center hole of the second wheel disc 6 is engaged with the outer end of the gear selection and shift shaft 5. The second wheel disc 6 is provided with a V-shaped opening groove that passes through the front and back and is connected to the center hole. The second wheel disc 6 uses screws 11 to connect the left and right sides of the V-shaped opening groove and tighten it to the outer end of the gear selection and shift shaft 5.

[0021] The outer ends of the first wheel disc 3 and the second wheel disc 6 are provided with grooves for accommodating the flexible shaft 4.

[0022] Both the mounting plate 7 and the mounting bracket 8 are provided with clips 12. The clips on the mounting plate 7 are distributed up and down so that the flexible shaft 4 is cross-clamped in the clips 12 up and down to form a cross-shaped structure of the flexible shaft on the outside of the first wheel disc 3. The clips 12 on the mounting bracket 8 are arranged in parallel left and right so that the flexible shaft can pass parallel to the second wheel disc 6.

[0023] While the present invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A shift mechanism for a CVT engine, comprising a shift arm (1), a shift head (2) connected to the top of the shift arm (1), and characterized by: A first wheel disc (3) that is self-rotatable and axially movable is fixed at the bottom of the shift arm (1); a reset structure for returning the first wheel disc (3) to an initial position is provided at the outer end of the first wheel disc (3); a flexible shaft (4) is wound around the outer ring of the first wheel disc (3) and is connected to a second wheel disc (6) fixedly connected to the outer end of the engine's gear selection and shift shaft (5) through the flexible shaft (4); the shift arm (1) controls the first wheel disc (3) to drive the second wheel disc (6) to synchronously move axially and rotate radially to form a shift control structure in which the shift arm (1) controls the axial movement and radial rotation of the gear selection and shift shaft (5); the diameter of the first wheel disc (3) is larger than that of the second wheel disc (6).

2. The shift mechanism for a CVT engine according to claim 1, characterized in that: The first wheel disc (3) and the second wheel disc (6) are fixed to the engine via a mounting plate (7) and a mounting bracket (8), respectively; an optical axis is fixed to the mounting plate (7); the first wheel disc (3) is mounted on the optical axis; the reset structure comprises a reset spring (9) sleeved on the optical axis; the outer end of the optical axis is connected to a reset spring pressure plate (10); one end of the reset spring (9) presses against the first wheel disc (3) to position it in an initial position close to the mounting plate (7), while the other end of the reset spring (9) presses against the reset spring pressure plate (10).

3. The shift mechanism for a CVT engine according to claim 2, characterized in that: The flexible shaft (4) starts from the upper side of the first wheel disc (3) and is closely attached to the outer ring and passes through the lower side to form a cross-shaped structure of the flexible shaft (4) outside the first wheel disc (3).

4. The shift mechanism for a CVT engine according to claim 1, characterized in that: The second wheel disc (6) is detachably fixedly connected to the outer end of the gear selection and shift shaft (5); the center hole of the second wheel disc (6) is meshedly connected to the outer end of the gear selection and shift shaft (5); a V-shaped opening groove is provided on the second wheel disc (6) and is connected to the center hole; the second wheel disc (6) is connected to the left and right sides of the V-shaped opening groove by screws (11) and is clamped to the outer end of the gear selection and shift shaft (5).

5. The shift mechanism for a CVT engine according to claim 1, characterized in that: The outer ends of the first wheel disc (3) and the second wheel disc (6) are provided with grooves for accommodating the flexible shaft (4).

6. The shift mechanism for a CVT engine according to claim 3, characterized in that: The mounting plate (7) and the mounting bracket (8) are both provided with buckles (12). The buckles on the mounting plate (7) are distributed up and down so that the flexible shaft (4) is cross-clamped in the buckles (12) up and down to form a cross-shaped structure of the flexible shaft outside the first wheel disc (3). The buckles (12) on the mounting bracket (8) are arranged in parallel on the left and right so that the flexible shaft passes around the second wheel disc (6) in parallel.

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