Reverse-gear direct-hanging type five-gear mini-tiller gearbox

Abstract

The utility model discloses a reverse gear direct hanging type five-gear mini-tiller gearbox which comprises a box body, an input shaft is arranged in the box body, a gear shifting mechanism is arranged in the box body, the gear shifting mechanism comprises a gear shifting shaft, the gear shifting shaft is rotatably connected with the inner wall of the box body through two bearings, the end of the gear shifting shaft is fixedly connected with an output shaft, and the output shaft is fixedly connected with the gear shifting shaft. A gear reversing shaft and a transmission shaft are arranged on the two sides of the gear shifting shaft respectively, a driven gear is fixedly connected to one end of the transmission shaft, a fluted disc is connected to one side of the driven gear in a meshed mode and fixedly connected with the input shaft, and a first transmission gear, a second transmission gear and a third transmission gear are fixedly connected to the transmission shaft. Belongs to the technical field of gearboxes. According to the reverse gear direct hanging type five-gear mini-tiller gearbox, by pulling the external independent reverse gear rod connected with the gear shifting arm, the gear shifting arm drives the third gear shifting gear to be meshed with the reverse gear, the reverse gear can be directly engaged at any gear, downshift operation is not needed, and use convenience is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, specifically a reverse gear direct-engagement five-speed micro-tiller gearbox. Background Technology

[0002] The agricultural machinery gearbox is a core component of the agricultural machinery transmission system. It is responsible for converting the engine's high-speed, low-torque output into low-speed, high-torque output suitable for the drive wheels and power output shaft, in order to meet the speed and power requirements of different operating scenarios. Its performance directly affects the fuel economy, operating comfort, and reliability of the agricultural machinery. In existing technology, agricultural machinery gearboxes have a separate long reverse gear shaft, which is complex in structure and requires the user to perform reverse gear operations sequentially to engage reverse gear, making it less than ideal in terms of ease of use. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a reverse gear direct-engagement five-speed micro-tiller gearbox, which solves the problem that agricultural machinery gearboxes have an independently set reverse gear shaft, resulting in a complex structure and requiring users to perform reverse gear operations sequentially to engage the reverse gear, thus making them less convenient to use.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a reverse gear direct-engagement five-speed micro-tiller gearbox, including a housing, an input shaft inside the housing, and a gear shifting mechanism inside the housing;

[0005] The shifting mechanism includes a shift shaft, which is rotatably connected to the inner wall of the housing via two bearings. An output shaft is fixedly connected to the end of the shift shaft. A reverse gear shaft and a drive shaft are respectively provided on both sides of the shift shaft. A driven gear is fixedly connected to one end of the drive shaft. A gear plate is meshed with one side of the driven gear. The gear plate is fixedly connected to the input shaft. A first drive gear, a second drive gear, and a third drive gear are fixedly connected to the drive shaft. A movable sleeve is slidably connected to the shift shaft via a spline. A shift fork is provided on the movable sleeve. The first shift gear, the second shift gear, and the third shift gear are fixedly connected to the movable sleeve. A reverse gear and a drive gear are fixedly connected to the reverse gear shaft.

[0006] Preferably, the drive shaft is rotatably connected to the inner wall of the housing, and the end of the drive shaft is connected to the input shaft via a driven gear and a gear disc, so that the input shaft can transmit power to the drive shaft.

[0007] Preferably, the diameter of the first transmission gear is smaller than that of the third transmission gear, the diameter of the first transmission gear is larger than that of the second transmission gear, and the first transmission gear, the second transmission gear and the third transmission gear are arranged on the transmission shaft from left to right.

[0008] Preferably, the diameter of the first shift gear is smaller than that of the second shift gear, the diameter of the first shift gear is larger than that of the third shift gear, and the first, second, and third shift gears are arranged sequentially on the movable sleeve from left to right.

[0009] Preferably, the end of the shift fork penetrates through the housing and extends partially to the outside of the housing. A shift arm is installed on the shift fork, which allows the user to directly drive the shift fork to engage reverse gear without having to downshift sequentially, thus improving the convenience of operation.

[0010] Preferably, the reverse gear shaft is rotatably connected to the inner wall of the housing, the drive gear meshes with the third transmission gear, and the reverse gear is matched with the third shift gear, so that the third transmission gear can drive the drive gear to rotate, the drive gear can drive the reverse gear to rotate synchronously, and the reverse gear drives the third shift gear to rotate, thereby realizing the reverse gear operation.

[0011] This utility model provides a reverse-gear direct-engagement five-speed micro-tiller gearbox. Compared with the prior art, it has the following advantages:

[0012] 1. This reverse gear direct-engagement five-speed micro-tiller gearbox allows for direct engagement of reverse gear from any gear position without downshifting, thus improving ease of use. The gear shifting arm moves via a shift fork, which in turn engages the third shift gear with the reverse gear.

[0013] 2. This reverse-gear direct-engage five-speed micro-tiller gearbox uses a shift fork to switch between three forward gears, adapting to different driving conditions and road conditions.

[0014] 3. This reverse gear direct-engagement five-speed micro-tiller gearbox, through optimization and simplification of the reverse gear shaft structure, can reduce internal space and reduce the size of the gearbox. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the shifting mechanism of this utility model;

[0017] Figure 3 This is a rear view schematic diagram of the shifting mechanism of this utility model.

[0018] In the diagram: 1. Housing; 2. Gear shifting mechanism; 201. Gear shifting shaft; 202. Output shaft; 203. Drive shaft; 204. Driven gear; 205. Gear disc; 206. First drive gear; 207. Second drive gear; 208. Third drive gear; 209. Movable sleeve; 210. First shift gear; 211. Second shift gear; 212. Third shift gear; 213. Gear shift fork; 214. Reverse shaft; 215. Reverse gear; 216. Drive gear; 3. Input shaft; 4. Gear shift arm. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3 This utility model provides a technical solution: a reverse direct-engagement five-speed micro-tiller gearbox, including a housing 1, an input shaft 3 inside the housing 1, and a shifting mechanism 2 inside the housing 1. The shifting mechanism 2 can switch between three forward gears and one neutral gear, which can adapt to different driving conditions and road conditions. An external independent reverse gear lever is connected to the shifting arm 4, so that reverse gear can be directly engaged in any gear without downshifting, effectively improving the convenience of use.

[0021] The gear shifting mechanism 2 includes a shift shaft 201, which is rotatably connected to the inner wall of the housing 1 via two bearings, allowing the driven gear 204 to maintain stable meshing with the gear disc 205, thus making the operation smoother. An output shaft 202 is fixedly connected to the end of the shift shaft 201, enabling power output via the output shaft 202. A reverse gear shaft 214 and a drive shaft 203 are respectively provided on both sides of the shift shaft 201. A driven gear 204 is fixedly connected to one end of the drive shaft 203, and a gear disc 205 is meshed with one side of the driven gear 204. The gear disc 205 is fixedly connected to the input shaft 3. The drive shaft 203 is rotatably connected to the inner wall of the housing 1, and the end of the drive shaft 203 is connected to the input shaft 3 via the driven gear 204 and the gear disc 205. A dynamic connection allows the input shaft 3 to transmit power to the transmission shaft 203. A first transmission gear 206, a second transmission gear 207, and a third transmission gear 208 are fixedly connected to the transmission shaft 203. The diameter of the first transmission gear 206 is smaller than that of the third transmission gear 208, and the diameter of the first transmission gear 206 is larger than that of the second transmission gear 207. The first transmission gear 206, the second transmission gear 207, and the third transmission gear 208 are arranged sequentially from left to right on the transmission shaft 203. A movable sleeve 209 is slidably connected to the shift shaft 201 via a spline. The diameter of the first shift gear 210 is smaller than that of the second shift gear 211, and the diameter of the first shift gear 210 is larger than that of the third shift gear 212. 0. The second shift gear 211 and the third shift gear 212 are sequentially arranged on the movable sleeve 209 from left to right. The first shift gear 210, the second shift gear 211, and the third shift gear 212 correspond one-to-one with the first transmission gear 206, the second transmission gear 207, and the third transmission gear 208, enabling the switching of three forward gears. The movable sleeve 209 is equipped with a shift fork 213, which can drive the movable sleeve 209 to move, thereby enabling gear shifting. The end of the shift fork 213 penetrates through the housing 1 and partially extends outside the housing 1. A shift arm 4 is installed on the shift fork 213, allowing the user to directly drive the shift fork 213 to engage reverse gear via the shift arm 4, without needing to... By sequentially downshifting, the ease of operation is improved. The movable sleeve 209 is fixedly connected to the first shift gear 210, the second shift gear 211, and the third shift gear 212. The reverse gear shaft 214 is fixedly connected to the reverse gear 215 and the drive gear 216. The reverse gear shaft 214 is rotatably connected to the inner wall of the housing 1. The drive gear 216 meshes with the third transmission gear 208, and the reverse gear 215 matches the third shift gear 212, so that the third transmission gear 208 can drive the drive gear 216 to rotate. The drive gear 216 drives the reverse gear shaft 214 to rotate, and the rotation of the reverse gear shaft 214 drives the reverse gear 215 to rotate. The reverse gear 215 then drives the third shift gear 212 to rotate, thus realizing the reverse gear operation.

[0022] During operation, the input shaft 3 drives the gear disc 205 to rotate, which in turn drives the driven gear 204 to rotate. The driven gear 204 then drives the transmission shaft 203 to rotate. The transmission shaft 203, through the transmission gear and the shift gear, drives the shift shaft 201 to rotate. The shift shaft 201 then drives the output shaft 202 to rotate, thus outputting power. The shift fork 213 drives the movable sleeve 209 to move. The movable sleeve 209 then engages the first shift gear 210 with the first transmission gear 206 and the second shift gear 211. The gear engages with the second transmission gear 207 and the third shift gear 212 engages with the third transmission gear 208 to achieve switching between three forward gears, which can adapt to different driving conditions and road conditions. Then, the external independent reverse gear lever connected to the shift arm 4 is pulled. The shift arm 4 drives the movable sleeve 209 to move through the shift fork 213. The movement of the movable sleeve 209 drives the third shift gear 212 to engage with the reverse gear 215. Reverse gear can be directly engaged in any gear without the user having to downshift, which effectively improves the convenience of use.

[0023] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A reverse-gear direct-engagement five-speed micro-tiller gearbox, comprising a housing (1), characterized in that: The housing (1) is equipped with an input shaft (3) and a gear shifting mechanism (2). The shifting mechanism (2) includes a shifting shaft (201), which is rotatably connected to the inner wall of the housing (1) via two bearings. An output shaft (202) is fixedly connected to the end of the shifting shaft (201). A reverse gear shaft (214) and a transmission shaft (203) are respectively provided on both sides of the shifting shaft (201). A driven gear (204) is fixedly connected to one end of the transmission shaft (203). A gear disc (205) is meshed with one side of the driven gear (204). The gear disc (205) is fixedly connected to the input shaft (3). A first transmission gear (206), a second transmission gear (207), and a third transmission gear (208) are fixedly connected to the shaft (203). A movable sleeve (209) is slidably connected to the shift shaft (201) via a spline. A shift fork (213) is provided on the movable sleeve (209). A first shift gear (210), a second shift gear (211), and a third shift gear (212) are fixedly connected to the movable sleeve (209). A reverse gear (215) and a drive gear (216) are fixedly connected to the reverse shaft (214).

2. The reverse direct-engagement five-speed micro-tiller gearbox according to claim 1, characterized in that: The drive shaft (203) is rotatably connected to the inner wall of the housing (1), and the end of the drive shaft (203) is connected to the input shaft (3) through the driven gear (204) and the gear plate (205).

3. The reverse direct-engagement five-speed micro-tiller gearbox according to claim 1, characterized in that: The diameter of the first transmission gear (206) is smaller than that of the third transmission gear (208), and the diameter of the first transmission gear (206) is larger than that of the second transmission gear (207). The first transmission gear (206), the second transmission gear (207) and the third transmission gear (208) are arranged on the transmission shaft (203) from left to right.

4. The reverse direct-engagement five-speed micro-tiller gearbox according to claim 1, characterized in that: The diameter of the first shift gear (210) is smaller than that of the second shift gear (211), and the diameter of the first shift gear (210) is larger than that of the third shift gear (212). The first shift gear (210), the second shift gear (211), and the third shift gear (212) are arranged on the movable sleeve (209) from left to right.

5. The reverse direct-engagement five-speed micro-tiller gearbox according to claim 1, characterized in that: The end of the shift fork (213) penetrates through the housing (1) and extends partially to the outside of the housing (1). A shift arm (4) is installed on the shift fork (213).

6. The reverse direct-engagement five-speed micro-tiller gearbox according to claim 1, characterized in that: The reverse gear shaft (214) is rotatably connected to the inner wall of the housing (1), the drive gear (216) meshes with the third transmission gear (208), and the reverse gear (215) is matched with the third shift gear (212).

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