Mechanical gear shifting mechanism with multi-gear switching function

Abstract

The utility model relates to the technical field of transmission control, in particular to a mechanical gear shifting mechanism with a multi-gear switching function, which comprises a main body frame, a rotary shifting block assembly is arranged on the main body frame, a shifting fork linkage assembly is arranged on the rotary shifting block assembly, a positioning assembly is arranged in the shifting fork linkage assembly, and the positioning assembly is arranged on the main body frame. And a power output assembly is arranged on the shifting fork linkage assembly. The rotary shifting block assembly is arranged, the shifting block body is of an asymmetric multi-curved-surface structure, and a high-gear curved-surface groove, a first neutral-gear curved-surface groove, a low-gear curved-surface groove, a second neutral-gear curved-surface groove, a middle-gear curved-surface groove and a third neutral-gear curved-surface groove form a composite guide groove, so that a user is allowed to complete multi-gear switching in single rotation operation; an efficient and flexible power transmission and guide mechanism is provided for gear shifting operation, the convenience of gear shifting operation is greatly improved, and the gear shifting process is smoother and more natural.

Description

TECHNICAL FIELD

[0001] The utility model relates to transmission control technical field especially relates to a mechanical gear shifting mechanism with multiple gear switching functions. BACKGROUND

[0002] Tractor is a kind of self-propelled power machinery used for traction or driving various farm implements to carry out agricultural operations such as ploughing, sowing and harvesting, and can be adapted to other equipment for transportation, engineering and other scenes.

[0003] However, the gear shifting mechanism of the traditional tractor often needs to follow a series of complex steps and processes to complete the switching between multiple gears when shifting gears, not only brings great operation burden to the user, but also is prone to unstable shifting, lag and other phenomena, secondly, the gear shifting mechanism of the traditional tractor lacks effective self-locking function, leading to misoperation after the completion of gear shifting, and further adversely affecting the stability of tractor running, in addition, the gear shifting mechanism of the traditional tractor is not accurate in power transmission and separation link, and is prone to generate great impact in the gear shifting process, not only reduces the transmission efficiency of engine power, but also makes the tractor unable to obtain reliable and stable power support. SUMMARY

[0004] The utility model aims at providing a mechanical gear shifting mechanism with multiple gear switching functions to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: it includes main body frame, is provided with rotating knob assembly on the main body frame, is provided with shift fork linkage assembly on rotating knob assembly, is provided with positioning assembly in shift fork linkage assembly, is provided with power output assembly on shift fork linkage assembly.

[0006] As preferred in the utility model, the rotating knob assembly includes an end cover arranged on the main body frame, a control power transmission shaft is arranged in the middle of the end cover, a control rocker arm is arranged at one end of the control power transmission shaft, and a knob main body is arranged at the end of the control power transmission shaft away from the control rocker arm.

[0007] As preferred in the utility model, a high gear curved groove is formed in one side of the knob main body, a first idle gear curved groove is formed in the knob main body at the bottom of the high gear curved groove, a resistance curved groove is formed in the knob main body at the bottom of the first idle gear curved groove, a high gear shifting point one is arranged at one end of the high gear curved groove, an idle shifting point one is arranged at the connection between the high gear curved groove and the first idle gear curved groove, a middle gear shifting point one is arranged in the middle of the first idle gear curved groove, an idle shifting point two is arranged at the connection between the first idle gear curved groove and a low gear curved groove, and a low gear shifting point one is arranged at one end of the low gear curved groove.

[0008] As the utility model is preferred, the operating power transmission shaft is provided with a neutral gear curved groove two on the side of the shifting head main body away from the high gear curved groove, a medium gear curved groove is formed on the shifting head main body at the bottom of the neutral gear curved groove two, a neutral gear curved groove three is formed on the shifting head main body at the bottom of the medium gear curved groove, a low gear shifting point two is arranged at one end of the neutral gear curved groove two, a neutral gear shifting point three is arranged at the joint of the neutral gear curved groove two and the medium gear curved groove, a medium gear shifting point two is arranged at the middle of the medium gear curved groove, a neutral gear shifting point four is arranged at the joint of the medium gear curved groove and the neutral gear curved groove three, and a high gear shifting point two is arranged at one end of the neutral gear curved groove three.

[0009] As the utility model is preferred, the shifting fork linkage assembly comprises a shifting fork shaft arranged on the main body frame, a first shifting fork is sleeved on one side of the shifting fork shaft, a first gear lever is arranged on the first shifting fork, the first gear lever is connected with the shifting head main body, a second shifting fork is sleeved on the side of the shifting fork shaft away from the first shifting fork, a second gear lever is arranged on the second shifting fork, and the second gear lever is connected with the shifting head main body.

[0010] As the utility model is preferred, the positioning assembly comprises a neutral gear positioning groove one formed on one side of the shifting fork shaft, a high gear positioning groove is formed on the shifting fork shaft at one side of the neutral gear positioning groove one, a low gear positioning groove is formed on the shifting fork shaft at the side of the neutral gear positioning groove one away from the high gear positioning groove, an installation groove one is formed on the first shifting fork, an open pin one is arranged in the installation groove one, a positioning spring one is arranged between the open pin one and the inner wall of the first shifting fork, and a positioning steel ball one is arranged at one end of the open pin one.

[0011] As the utility model is preferred, a neutral gear positioning groove two is formed on the side of the shifting fork shaft away from the first shifting fork, a medium gear positioning groove is formed on the shifting fork shaft at one side of the neutral gear positioning groove two, an installation groove two is formed on the second shifting fork, an open pin two is arranged in the installation groove two, a positioning spring two is arranged between the open pin two and the inner wall of the second shifting fork, and a positioning steel ball two is arranged at one end of the open pin two.

[0012] As the utility model is preferred, the power output assembly comprises an output shaft arranged on the main body frame, a high gear is arranged on one side of the output shaft through a bearing, an engaging gear ring one is arranged on the high gear, a synchronizer gear hub one is arranged on the output shaft at one side of the high gear, a shift sleeve one is sleeved on the outer side of the synchronizer gear hub one, the first shifting fork is connected with the shift sleeve one, a conical clutch one is arranged on the shift sleeve one, a low gear is arranged on the output shaft at one side of the synchronizer gear hub one away from the high gear through a bearing, and an engaging gear ring two is arranged on the low gear.

[0013] In a preferred embodiment of this invention, a middle gear is mounted on the output shaft of the low gear on the side away from the synchronizer hub via a bearing. The middle gear is provided with a gear ring three. A synchronizer hub two is mounted on the output shaft of the middle gear on the side away from the low gear. A shift sleeve two is sleeved on the outer side of the synchronizer hub two. The second shift fork is connected to the shift sleeve two. A conical clutch two is provided on the shift sleeve two.

[0014] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0015] 1. This utility model, by setting a rotating shifter assembly, facilitates gear shifting operations for users by manipulating the rocker arm. The power transmission shaft accurately transmits the rotational power of the rocker arm to the shifter body. Furthermore, the shifter body adopts an asymmetrical multi-curved surface structure. The high-gear curved surface groove, neutral curved surface groove one, low-gear curved surface groove, neutral curved surface groove two, medium-gear curved surface groove, and neutral curved surface groove three form a composite guide groove, allowing users to complete multiple gear shifts in a single rotation operation. When engaging high gear, clockwise rotation drive is implemented, and bidirectional self-locking is achieved when resetting to neutral. The switching between medium and low gears adopts differentiated rotation angle control, providing an efficient and flexible power transmission and guidance mechanism for gear shifting operations, greatly improving the convenience of gear shifting operations, and making the gear shifting process smoother and more natural.

[0016] 2. This utility model, by setting up a shift fork linkage assembly, provides a stable mounting and sliding support for the first and second shift forks, ensuring that the first and second shift forks can move stably left and right to achieve shifting action. Secondly, the first and second gear levers are closely matched with the shift head body. When the shift head body rotates, the first and second gear levers can accurately convert the rotational motion into linear motion along the composite guide groove, thereby efficiently driving the first and second shift forks to shift gears, ensuring the accuracy and reliability of the shifting action, and making the shifting process smooth and orderly.

[0017] 3. This utility model, by setting up positioning components, enables the shifting mechanism to have excellent self-locking function. By opening neutral gear positioning groove one, high gear positioning groove, low gear positioning groove, neutral gear positioning groove two, and medium gear positioning groove on the shift fork shaft, and working in coordination with positioning steel ball one, positioning spring one, cotter pin one, positioning steel ball two, positioning spring two, and cotter pin two, precise self-locking of each gear is achieved, ensuring stability after shifting, effectively preventing gear misoperation, improving the reliability and safety of the shifting mechanism during operation, and ensuring the smoothness of tractor driving.

[0018] 4. This utility model achieves precise power transmission and separation at different gears by setting up a power output component, and cleverly cooperating a high-gear gear, engagement gear ring one, low-gear gear, engagement gear ring two, medium-gear gear, engagement gear ring three, and conical clutch one and conical clutch two. Secondly, the combination of synchronizer hub one and synchronizer hub two and shift sleeve one and shift sleeve two reduces the impact during gear shifting, making the shifting process smoother and more gentle, ensuring that the engine power can be efficiently and stably transmitted from the input shaft to the output shaft, providing reliable power support for the tractor. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0022] Figure 4 This is a schematic diagram of the rotating dial assembly structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the power output component structure of this utility model;

[0024] Figure 6 This is a schematic diagram of the low-gear structure in the power output assembly of this utility model;

[0025] Figure 7 This is a schematic diagram of the intermediate gear structure in the power output assembly of this utility model;

[0026] Figure 8 This is a schematic diagram of the synchronizer hub one and synchronizer hub two in the power output assembly of this utility model.

[0027] Figure 9 This is a schematic diagram of the high-gear structure in the power output component of this utility model.

[0028] Reference numerals: Main frame 1, Rotary shifter assembly 2, End cap 21, Operating power transmission shaft 22, Operating rocker arm 23, Shifter body 24, High gear curved groove 25, Neutral gear curved groove one 26, Low gear curved groove 27, High gear shift point one 28, Neutral gear shift point one 29, Neutral gear shift point two 210, Medium gear shift point one 211, Low gear shift point one 212, Neutral gear curved groove two 213, Medium gear curved groove 214, Neutral gear curved groove three 215, Low gear shift point two 216, Neutral gear shift point three 217, Neutral gear shift point four 218, Medium gear shift point two 219, High gear shift point two 220, Shift fork linkage assembly 3, Shift fork shaft 31, First shift fork 32, First gear lever 33, Second shift fork 34, Second gear 35. Lever, 4. Positioning assembly, 41. Neutral positioning groove 1, 42. High gear positioning groove, 43. Low gear positioning groove, 44. Mounting groove 1, 45. Cotter pin 1, 46. Positioning spring 1, 47. Positioning steel ball 1, 48. Neutral positioning groove 2, 49. Medium gear positioning groove, 410. Mounting groove 2, 411. Cotter pin 2, 412. Positioning spring 2, 413. Positioning steel ball 2, 5. Power output assembly, 51. High gear, 52. Engaging gear ring 1, 53. Synchronizer hub 1, 54. Cone clutch 1, 55. Shift sleeve 1, 56. Low gear, 57. Engaging gear ring 2, 59. Medium gear, 59. Engaging gear ring 3, 510. Synchronizer hub 2, 511. Cone clutch 2, 512. Shift sleeve 2, 513. Output shaft. Detailed Implementation

[0029] 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 specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0030] like Figures 1-9 As shown, the present invention proposes a mechanical shifting mechanism with multi-gear switching function, which includes a main frame 1, a rotary dial assembly 2 on the main frame 1, a shift fork linkage assembly 3 on the rotary dial assembly 2, a positioning assembly 4 inside the shift fork linkage assembly 3, and a power output assembly 5 on the shift fork linkage assembly 3.

[0031] The rotary shifter assembly 2 includes an end cap 21 mounted on the main frame 1. An operating power transmission shaft 22 is located in the middle of the end cap 21. The operating power transmission shaft 22 transmits the rotational power of the operating rocker arm 23 to the shifter body 24. An operating rocker arm 23 is located at one end of the operating power transmission shaft 22. The operating rocker arm 23 is manually operated by the operator. The operator's rotational action converts human power into rotational power, providing power input for shifting operations. The shifter body 24 is located at the end of the operating power transmission shaft 22 away from the operating rocker arm 23.

[0032] A high-gear curved groove 25 is provided on one side of the dial head body 24. A neutral curved groove 26 is provided on the dial head body 24 at the bottom of the high-gear curved groove 25. A stop curved groove is provided on the dial head body 24 at the bottom of the neutral curved groove 26. A high-gear shift point 28 is provided at one end of the high-gear curved groove 25. A neutral shift point 29 is provided at the connection between the high-gear curved groove 25 and the neutral curved groove 26. A medium shift point 211 is provided in the middle of the neutral curved groove 26. A neutral shift point 210 is provided at the connection between the neutral curved groove 26 and the low-gear curved groove 27. A low-gear shift point 212 is provided at one end of the low-gear curved groove 27.

[0033] A neutral gear groove 213 is provided on the shift head body 24 on the side of the drive shaft 22 away from the high gear groove 25. A medium gear groove 214 is provided on the shift head body 24 at the bottom of the neutral gear groove 213. A neutral gear groove 215 is provided on the shift head body 24 at the bottom of the medium gear groove 214. A low gear shift point 216 is provided at one end of the neutral gear groove 213. A neutral gear shift point 217 is provided at the connection between the neutral gear groove 213 and the medium gear groove 214. The middle section is provided with a middle gear shift point 219, and the connection between the middle gear curved groove 214 and the neutral gear curved groove 3 215 is provided with a neutral gear shift point 4 218. One end of the neutral gear curved groove 3 215 is provided with a high gear shift point 220. The main body of the shift head 24 adopts an asymmetrical multi-curved surface structure. The composite guide groove formed by the high gear curved groove 25, the neutral gear curved groove 1 26, the low gear curved groove 27, the neutral gear curved groove 213, the middle gear curved groove 214, and the neutral gear curved groove 3 215 allows multiple gear switching to be completed in a single rotation operation.

[0034] The shift fork linkage assembly 3 includes a shift fork shaft 31 mounted on the main frame 1. The shift fork shaft 31 provides axial support for the installation and sliding of the first shift fork 32 and the second shift fork 34, allowing the shift forks to move left and right on it to achieve shifting action. The first shift fork 32 is sleeved on one side of the shift fork shaft 31. The first shift fork 32 is provided with a first stop lever 33, which is connected to the shift head body 24. When the shift head body 24 rotates, the first stop lever 33 moves along the composite guide groove on the shift head body 24, thereby shifting the shift head body. The rotational motion of 24 is converted into its own linear motion, thereby driving the first shift fork 32 to perform a shifting action. A second shift fork 34 is sleeved on the side of the shift fork shaft 31 away from the first shift fork 32. A second stop lever 35 is provided on the second shift fork 34. The second stop lever 35 is connected to the shift head body 24. When the shift head body 24 rotates, the second stop lever 35 moves along the composite guide groove on the shift head body 24, converting the rotational motion of the shift head body 24 into its own linear motion, thereby driving the second shift fork 34 to perform a shifting action.

[0035] The positioning component 4 includes a neutral positioning groove 41 on one side of the shift fork shaft 31. The neutral positioning groove 41 cooperates with a positioning steel ball 47 to achieve self-locking of the first shift fork 32, ensuring stability after gear shifting. A high-gear positioning groove 42 is provided on the shift fork shaft 31 on one side of the neutral positioning groove 41. The high-gear positioning groove 42 cooperates with the positioning steel ball 47. When the shifting mechanism is engaged in a high gear, the positioning steel ball 47 engages in the high-gear positioning groove 42, achieving high-gear self-locking and ensuring the reliability of high-gear operation. A low-gear positioning groove 43 is provided on the shift fork shaft 31 on the side of the neutral positioning groove 41 away from the high-gear positioning groove 42. The low-gear positioning groove 43 cooperates with the positioning steel ball 47. When the shifting mechanism is engaged in a low gear, the positioning steel ball 47 engages in the low-gear positioning groove 43, achieving low-gear self-locking and ensuring the reliability of low-gear operation. The shift fork 32 has a mounting groove 44, and a cotter pin 45 is installed in the mounting groove 44. The cotter pin 45 limits the positioning spring 46 to prevent the positioning spring 46 from shifting during extension and retraction. At the same time, it cooperates with the positioning steel ball 47 to transfer the elastic force of the positioning spring 46 to the positioning steel ball 47. The positioning spring 46 is installed between the cotter pin 45 and the inner wall of the first shift fork 32. The positioning spring 46 provides elastic force to the positioning steel ball 47, so that the positioning steel ball 47 can be locked into the corresponding positioning groove to realize the self-locking function after shifting. The positioning steel ball 47 is installed at one end of the cotter pin 45. Under the action of the positioning spring 46, the positioning steel ball 47 cooperates with the corresponding positioning groove to realize the self-locking function after shifting and ensure the gear stability of the shifting mechanism.

[0036] A neutral positioning groove 48 is provided on the side of the shift fork shaft 31 away from the first shift fork 32. The neutral positioning groove 48 cooperates with the positioning steel ball 413 to achieve self-locking of the second shift fork 34, ensuring stability after shifting. When the neutral position is reset, the neutral positioning groove 41, the positioning steel ball 47, the neutral positioning groove 48, and the positioning steel ball 413 achieve bidirectional self-locking. A neutral positioning groove 49 is provided on the shift fork shaft 31 on the side of the neutral positioning groove 48. The neutral positioning groove 49 cooperates with the positioning steel ball 413. When the shifting mechanism is engaged in neutral, the positioning steel ball 413 is engaged in the neutral positioning groove 49, achieving self-locking of neutral and ensuring the reliability of neutral operation. A mounting groove 410 is provided on the second shift fork 34, and a cotter pin 41 is provided in the mounting groove 410. 1. The cotter pin 411 limits the positioning spring 412, preventing it from shifting during extension and retraction. Simultaneously, it cooperates with the positioning ball 413 to transfer the elastic force of the positioning spring 412 to the positioning ball 413. The positioning spring 412 is positioned between the cotter pin 411 and the inner wall of the second shift fork 34, providing elastic force to the positioning ball 413, allowing it to engage in the corresponding positioning groove and achieve a self-locking function after gear shifting. The positioning ball 413 is positioned at one end of the cotter pin 411. Under the action of the positioning spring 412, the positioning ball 413 cooperates with the corresponding positioning groove to achieve a self-locking function after gear shifting, ensuring the gear stability of the shifting mechanism.

[0037] The power output assembly 5 includes an output shaft 513 mounted on the main frame 1. The output shaft 513 provides a mounting base for other components in the power output assembly 5. A high-gear gear 51 is mounted on one side of the output shaft 51 via a bearing. A gear ring 52 is mounted on the high-gear gear 51, which engages with a conical clutch 54 to achieve engagement and disengagement. When the shift mechanism engages a high gear, the conical clutch 54 engages with the gear ring 52. The high-gear gear 51 is connected to a synchronizer hub 53 via the conical clutch 54, transmitting engine power to the output shaft 513. The synchronizer hub 53 is mounted on the output shaft 513 on one side of the high-gear gear 51. During shifting, the synchronizer hub 53 reduces shift shock, making the shifting process smoother. A shift sleeve 55 is fitted over the synchronizer hub 53, and the first shift fork 32 is connected to the shift sleeve 55. The shift sleeve 55 moves left and right under the drive of the first shift fork 32, causing the conical clutch 54 to engage with the engagement ring gear 52 of the high-gear 51 or the engagement ring gear 57 of the low-gear 56. The shift sleeve 55 is equipped with the conical clutch 54, which engages with the engagement ring gear 52 of the high-gear 51 or the engagement ring gear 57 of the low-gear 56 to achieve power transmission and disengagement. The synchronizer hub 53 is located on the side furthest from the high-gear 51. A low-gear 56 is mounted on the output shaft 513 via a bearing. A second engagement gear ring 57 is mounted on the low-gear 56. The first engagement gear ring 52 engages with a first conical clutch 54 to achieve the engagement and disengagement of the low-gear 56 and the first conical clutch 54. When the shifting mechanism is engaged in low gear, the first conical clutch 54 engages with the second engagement gear ring 57. The low-gear 56 is connected to the synchronizer hub 53 through the first conical clutch 54, transmitting the engine power to the output shaft 513.

[0038] A middle gear 58 is mounted on the output shaft 513 on the side of the low-gear 56 away from the synchronizer hub 53 via a bearing. The middle gear 58 has a third engagement gear ring 59, which engages with a second conical clutch 511 to achieve engagement and disengagement. When the shift mechanism is engaged in middle gear, the second conical clutch 511 engages with the third engagement gear ring 59. The high-gear 51 is connected to the synchronizer hub 510 via the second conical clutch 511, transmitting engine power to the output shaft 513. The middle gear 58 is located on the output shaft 513 on the side of the output shaft 513 away from the low-gear 56. The gear is equipped with a synchronizer hub 2 510. During gear shifting, the synchronizer hub 2 510 can reduce shifting impact and make the shifting process smoother. A shift sleeve 2 512 is sleeved on the outside of the synchronizer hub 2 510. The second shift fork 34 is connected to the shift sleeve 2 512. The shift sleeve 2 512 moves under the drive of the second shift fork 34, which drives the conical clutch 2 511 to engage or disengage with the engagement ring gear 3 59 of the intermediate gear 58. The shift sleeve 2 512 is equipped with a conical clutch 2 511. The conical clutch 2 511 cooperates with the engagement ring gear 3 59 of the intermediate gear 58 to realize the transmission and disengagement of power.

[0039] The mechanical shifting mechanism with multi-gear switching function includes the following specific steps when in use:

[0040] S1. Initial start: The first gear lever 33 is located at the neutral point 210 on the dial head body 24, and the second gear lever 35 is located at the neutral point 217 on the dial head body 24. The low gear 56, medium gear 58 and high gear 51 on the output shaft 513 receive the engine power transmitted from the input shaft and idle, while the output shaft 513 remains stationary.

[0041] S2, Low Gear Operation: Rotate the control rocker arm 23 counterclockwise. The control rocker arm 23 transmits power to the shift head body 24 through the control power transmission shaft 22, thereby driving the shift head body 24 to rotate counterclockwise. The first gear lever 33 moves along the low gear curved groove 27 to the low gear shift point 212. The first gear lever 33 pushes the first shift fork 32 and the shift sleeve 55 to move to the right. The conical clutch 54 on the shift sleeve 55 meshes with the engagement gear ring 57 on the low gear 56. When the first shift fork 32 moves to the right, the positioning steel ball 47 opens... When the cotter pin 45 is subjected to pressure, it squeezes the positioning spring 46, thereby retracting into the mounting groove 44. After the external force disappears, the positioning spring 46 releases its elastic potential energy, pushing the cotter pin 45 and the positioning steel ball 47 into the low gear positioning groove 43, realizing low gear self-locking. The low gear gear 56 transmits power to the output shaft 513 through the conical clutch 54 and the synchronizer hub 53, realizing the shifting mechanism from neutral to low gear. At the same time, the second gear lever 35 moves along the neutral curved groove 213 to the low gear shift point 216, while the position of the second shift fork 34 remains unchanged.

[0042] S3, Mid-gear operation: Rotate the operating rocker arm 23 clockwise. The first gear lever 33 moves along the low-gear curved groove 27 to the neutral shift point 210. The first gear lever 33 drives the first shift fork 32 to move to the left. The first shift fork 32 separates the conical clutch 54 from the engagement gear ring 57 through the shift sleeve 55. The positioning steel ball 47 re-enters the neutral shift positioning groove 41 after exiting the low-gear positioning groove 43. At the same time, the second gear lever 35 moves along the neutral curved groove 213 to the neutral shift point 217. The position of the second shift fork 34 remains unchanged. The positioning steel ball 47, the neutral shift positioning groove 41, the positioning steel ball 413, and the neutral shift positioning groove 48 cooperate to achieve bidirectional self-locking in neutral. Continue to rotate the operating rocker arm 23 clockwise. The second gear lever 35 moves along the mid-gear curved groove to the mid-gear shift point 219. The second gear lever 35 pushes... The second shift fork 34 and the shift sleeve 512 move to the left. The conical clutch 511 on the shift sleeve 512 meshes with the engagement ring gear 59 on the intermediate gear 58. When the second shift fork 34 moves to the left, the positioning steel ball 413 and the cotter pin 411 are under pressure and squeeze the positioning spring 412, thus retracting into the mounting groove 410. After the external force disappears, the positioning spring 412 releases its elastic potential energy and pushes the cotter pin 411 and the positioning steel ball 413 into the intermediate gear positioning groove 49, realizing the intermediate gear self-locking. The intermediate gear 58 transmits power to the output shaft 513 through the conical clutch 511 and the synchronizer hub 510, realizing the shift mechanism from low gear to intermediate gear. At the same time, the first gear lever 33 moves along the neutral curved groove 26 to the intermediate gear shift point 211, while the position of the first shift fork 32 remains unchanged.

[0043] S4. High Gear Operation: Rotate the control arm 23 clockwise. The second gear lever 35 moves along the intermediate gear curved groove 214 to the neutral gear shift point 218. The second gear lever 35 drives the second shift fork 34 to move to the right. The second shift fork 34 separates the conical clutch 511 from the engagement gear ring 59 through the shift sleeve 512. The positioning steel ball 413 re-enters the neutral gear positioning groove 48 after exiting the intermediate gear positioning groove 49. At the same time, the first gear lever 33 moves along the neutral gear curved groove 26 to the neutral gear shift point 29. The position of the first shift fork 32 remains unchanged. The positioning steel ball 47 and the neutral gear positioning groove 41 cooperate with the positioning steel ball 413 and the neutral gear positioning groove 48 to achieve bidirectional self-locking in neutral gear. Continue to rotate the control arm 23 clockwise. The first gear lever 33 moves along the high gear curved groove 25 to the high gear shift point 28. The first gear lever 33 pushes the first shift fork 32 and the shift sleeve 55 to move to the left. The conical clutch 54 on the shift sleeve 55 meshes with the engagement gear ring 52 on the high gear 51. When the first shift fork 32 moves to the left, the positioning steel ball 47 exits from the neutral positioning groove 41 and enters the high gear positioning groove 42, realizing high gear self-locking. The high gear 51 transmits power to the output shaft 513 through the conical clutch 54 and the synchronizer hub 53, realizing the shift mechanism from the middle gear to the high gear. At the same time, the second gear lever 35 moves along the neutral curved groove 215 to the high gear shift point 220, while the position of the second shift fork 34 remains unchanged.

[0044] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A mechanical gear shifting mechanism having a multi-gear shift function, comprising: The utility model provides a kind of main body frame (1), it is characterized by: the main body frame (1) is provided with rotating knob assembly (2), rotating knob assembly (2) is provided with shift fork linkage assembly (3), shift fork linkage assembly (3) is provided with positioning assembly (4) in, shift fork linkage assembly (3) is provided with power output assembly (5) on.

2. The mechanical gear shifting mechanism with multi-gear shifting function according to claim 1, characterized in that: The rotating knob assembly (2) includes an end cover (21) disposed on the main body frame (1), a control power transmission shaft (22) is disposed in the middle of the end cover (21), one end of the control power transmission shaft (22) is provided with a control rocker arm (23), and the end of the control power transmission shaft (22) away from the control rocker arm (23) is provided with a knob main body (24).

3. The mechanical gear shifting mechanism with multi-gear shifting function according to claim 2, characterized in that: The knob main body (24) is provided with a high gear curved groove (25) on one side, a first neutral curved groove (26) is formed in the knob main body (24) at the bottom of the high gear curved groove (25), a resistance curved groove is formed in the knob main body (24) at the bottom of the first neutral curved groove (26), a high gear shift point one (28) is provided at one end of the high gear curved groove (25), an empty shift point one (29) is provided at the junction of the high gear curved groove (25) and the first neutral curved groove (26), a neutral shift point one (211) is provided in the middle of the first neutral curved groove (26), an empty shift point two (210) is provided at the junction of the first neutral curved groove (26) and a low gear curved groove (27), and a low gear shift point one (212) is provided at one end of the low gear curved groove (27).

4. The mechanical gear shifting mechanism with multi-gear shifting function according to claim 3, characterized in that: The knob main body (24) is provided with a second neutral curved groove (213) on the side away from the high gear curved groove (25) of the control power transmission shaft (22), a middle gear curved groove (214) is formed in the knob main body (24) at the bottom of the second neutral curved groove (213), a third neutral curved groove (215) is formed in the knob main body (24) at the bottom of the middle gear curved groove (214), a low gear shift point two (216) is provided at one end of the second neutral curved groove (213), an empty shift point three (217) is provided at the junction of the second neutral curved groove (213) and the middle gear curved groove (214), a neutral shift point two (219) is provided in the middle of the middle gear curved groove (214), an empty shift point four (218) is provided at the junction of the middle gear curved groove (214) and the third neutral curved groove (215), and a high gear shift point two (220) is provided at one end of the third neutral curved groove (215).

5. The mechanical gear shifting mechanism with multi-gear shifting function according to claim 4, characterized in that: The shift fork linkage assembly (3) includes a shift fork shaft (31) disposed on the main body frame (1), a first shift fork (32) is sleeved on one side of the shift fork shaft (31), a first gear lever (33) is provided on the first shift fork (32), the first gear lever (33) is connected with the knob main body (24), a second shift fork (34) is sleeved on the side away from the first shift fork (32) of the shift fork shaft (31), a second gear lever (35) is provided on the second shift fork (34), and the second gear lever (35) is connected with the knob main body (24).

6. The mechanical gear shifting mechanism with multi-gear shifting function according to claim 5, characterized in that: The positioning assembly (4) includes a neutral position positioning groove (41) opened on one side of the fork shaft (31), a high gear positioning groove (42) opened on the fork shaft (31) on one side of the neutral position positioning groove (41), a low gear positioning groove (43) opened on the fork shaft (31) on the side away from the high gear positioning groove (42) of the neutral position positioning groove (41), a mounting groove (44) opened on the first fork (32), an open pin (45) arranged in the mounting groove (44), a positioning spring (46) arranged between the open pin (45) and the inner wall of the first fork (32), and a positioning steel ball (47) arranged on one end of the open pin (45).

7. The mechanical gear shifting mechanism with multi-gear shifting function according to claim 6, characterized in that: The fork shaft (31) is provided with a neutral position positioning groove (48) on the side away from the first fork (32), a middle gear positioning groove (49) is opened on the fork shaft (31) on one side of the neutral position positioning groove (48), a mounting groove (410) is opened on the second fork (34), an open pin (411) is arranged in the mounting groove (410), a positioning spring (412) is arranged between the open pin (411) and the inner wall of the second fork (34), and a positioning steel ball (413) is arranged on one end of the open pin (411).

8. The mechanical gear shifting mechanism with multi-gear shifting function according to claim 7, characterized in that: The power output assembly (5) includes an output shaft (513) arranged on the main body frame (1), a high gear (51) arranged on one side of the output shaft (513) through a bearing, an engaging gear ring (52) arranged on the high gear (51), a synchronizer gear hub (53) arranged on the output shaft (513) on one side of the high gear (51), a shift sleeve (55) sleeved on the outer side of the synchronizer gear hub (53), the first fork (32) connected with the shift sleeve (55), a conical clutch (54) arranged on the shift sleeve (55), a low gear (56) arranged on the output shaft (513) on the side away from the high gear (51) of the synchronizer gear hub (53) through a bearing, and an engaging gear ring (57) arranged on the low gear (56).

9. The mechanical gear shifting mechanism with multi-gear shifting function according to claim 8, characterized in that: A middle gear (58) is arranged on the output shaft (513) on the side away from the synchronizer gear hub (53) of the low gear (56) through a bearing, an engaging gear ring (59) is arranged on the middle gear (58), a synchronizer gear hub (510) is arranged on the output shaft (513) on the side away from the low gear (56) of the middle gear (58), a shift sleeve (512) is sleeved on the outer side of the synchronizer gear hub (510), the second fork (34) is connected with the shift sleeve (512), and a conical clutch (511) is arranged on the shift sleeve (512).

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