CN215059346U

CN215059346U - Gear box of micro-cultivator

Info

Publication number: CN215059346U
Application number: CN202121252412.6U
Authority: CN
Inventors: 曲法涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2021-12-07
Anticipated expiration: 2031-06-04

Abstract

The utility model discloses a mini-tiller gearbox, which comprises a main box body, a mini-tiller end box body and a walking end box body, wherein a power input shaft, a first mini-tiller transmission shaft, a second mini-tiller transmission shaft, a third mini-tiller transmission shaft and a fourth mini-tiller transmission shaft are rotatably arranged on the main box body; the micro-tillage transmission secondary shaft is in gear transmission with the micro-tillage transmission primary shaft, a micro-tillage forward rotation first driven wheel and a micro-tillage forward rotation second driven wheel are fixed on the micro-tillage transmission primary shaft, a micro-tillage forward rotation first driving wheel and a micro-tillage forward rotation second driving wheel are mounted on a spline on the micro-tillage transmission secondary shaft, and a micro-tillage forward rotation driving wheel and a micro-tillage reverse rotation driving wheel are fixed on the micro-tillage transmission primary shaft. The utility model discloses the variable speed mode is more.

Description

Gear box of micro-cultivator

Technical Field

The utility model relates to a gearbox especially relates to a plough quick-witted gearbox a little.

Background

The mini-tiller uses a small diesel engine or a gasoline engine as power, has the characteristics of light weight, small volume, simple structure and the like, can freely run in the field, is widely suitable for dry land, paddy field, orchard and other regions in plains, mountainous areas and hills, and is convenient for users to store, so the mini-tiller becomes the best choice for vast farmers to replace cattle farming.

The power of the engine in the mini-tiller is generally transmitted to the walking part and the mini-tiller part after passing through the clutch and the gearbox respectively. The existing gear box of the mini-tiller can only realize three-speed or four-speed switching no matter walking power or mini-tillage power. The three-speed or four-speed switching cannot meet the requirements of users on walking or micro-tillage speed control due to the influences of terrain, geology, user proficiency and the like. Therefore, the existing gearbox of the mini-tiller needs to be further improved and upgraded.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a quick-witted gearbox is ploughed a little of compact structure, variable speed mode is more, does benefit to the speed control demand that satisfies the user.

In order to solve the technical problem, the technical scheme of the utility model is that: the mini-tiller gearbox comprises a main box body, a mini-tillage end box body and a walking end box body, wherein the mini-tillage end box body and the walking end box body are fixedly arranged integrally with the main box body, a power input shaft is rotatably arranged on the main box body, a mini-tillage output shaft is rotatably arranged on the mini-tillage end box body, a walking output shaft is rotatably arranged on the walking end box body, a mini-tillage transmission primary shaft, a mini-tillage transmission secondary shaft, a mini-tillage transmission three-shaft and a mini-tillage transmission four-shaft are rotatably arranged in the main box body, a mini-tillage two-speed driven wheel is rotatably arranged on the mini-tillage transmission primary shaft, and a mini-tillage two-speed driving wheel which is normally meshed with the mini-tillage two-speed driven wheel is fixedly arranged on the power input shaft; a micro-tillage three-speed driving wheel and a micro-tillage first-speed driving wheel are sequentially fixed on one side of the micro-tillage second-speed driving wheel on the power input shaft, a micro-tillage three-speed driven wheel and a micro-tillage first-speed driven wheel are slidably mounted on the micro-tillage first-speed driving shaft through splines, and a micro-tillage main speed changing shifting groove is fixedly connected to the micro-tillage three-speed driven wheel and the micro-tillage first-speed driven wheel together; a second mini-tillage speed combiner is arranged between the second mini-tillage speed driven wheel and the third mini-tillage speed driven wheel; the micro-tillage transmission secondary shaft is in gear transmission connection with the micro-tillage transmission primary shaft, a micro-tillage forward rotation first driven wheel and a micro-tillage forward rotation second driven wheel are sequentially and fixedly arranged on the micro-tillage transmission tertiary shaft, a micro-tillage forward rotation first driving wheel and a micro-tillage forward rotation second driving wheel are slidably arranged on the micro-tillage transmission secondary shaft through splines, the micro-tillage forward rotation first driving wheel and the micro-tillage forward rotation second driving wheel are jointly and fixedly connected with a micro-tillage forward rotation shifting groove, a micro-tillage forward rotation driving wheel which is normally meshed with the micro-tillage forward rotation first driven wheel or the micro-tillage forward rotation second driven wheel is fixedly arranged on the micro-tillage transmission quaternary shaft, and a micro-tillage reverse rotation driving wheel which is meshed with the micro-tillage forward rotation first driving wheel or the micro-tillage forward rotation second driving wheel is also fixedly arranged on the micro-tillage transmission quaternary shaft; a mini-tillage tail end transmission device is arranged between the mini-tillage transmission four-axis and the mini-tillage output shaft; and a walking front-end transmission device is arranged in the main box body, and a walking tail-end transmission device is arranged between the tail end of the walking front-end transmission device and the walking output shaft.

As a preferred technical scheme, the walking front-end transmission device comprises a walking transmission primary shaft, a walking transmission secondary shaft, a walking transmission tertiary shaft and a walking transmission quaternary shaft which are rotatably arranged in the main box body; a walking two-speed driven wheel is rotatably mounted on the walking transmission shaft, and a walking two-speed driving wheel which is normally meshed with the walking two-speed driven wheel is fixedly arranged on the power input shaft; a walking three-speed driving wheel and a walking first-speed driving wheel are sequentially fixed on one side, located on the walking second-speed driving wheel, of the power input shaft, a walking three-speed driven wheel and a walking first-speed driven wheel are slidably mounted on the walking transmission shaft through splines, and the walking three-speed driven wheel and the walking first-speed driven wheel are fixedly connected with a walking main speed changing shifting groove; a second-speed walking connector is arranged between the second-speed walking driven wheel and the third-speed walking driven wheel; the walking transmission secondary shaft is in gear transmission connection with the walking transmission primary shaft, a walking forward rotation first driven wheel and a walking forward rotation second driven wheel are sequentially and fixedly arranged on the walking transmission tertiary shaft, a walking forward rotation first driving wheel and a walking forward rotation second driving wheel are slidably arranged on the walking transmission secondary shaft through splines, the walking forward rotation first driving wheel and the walking forward rotation second driving wheel are jointly and fixedly connected with a walking forward and reverse rotation shifting groove, the walking transmission quaternary shaft is in gear transmission connection with the walking transmission tertiary shaft, and a walking reverse rotation driving wheel which can be meshed with the walking forward rotation first driving wheel or the walking forward rotation second driving wheel is fixedly arranged on the walking transmission quaternary shaft; and the walking tail end transmission device is arranged between the walking transmission four-axis and the walking output shaft.

As a preferable technical scheme, the two-speed mini-tilling driving wheel also serves as the two-speed traveling driving wheel, the three-speed mini-tilling driving wheel also serves as the three-speed traveling driving wheel, and the one-speed mini-tilling driving wheel also serves as the one-speed traveling driving wheel.

As a preferable technical solution, the second-speed walking coupling includes second-speed walking coupling teeth fixedly provided on an end surface of the second-speed walking driven wheel facing the third-speed walking driven wheel, and the third-speed walking driving wheel is provided with second-speed walking coupling grooves corresponding to the second-speed walking coupling teeth.

According to the preferable technical scheme, the walking tail end transmission device comprises at least one walking tail end transmission gear which is detachably and rotatably installed on the walking end box body, a walking tail end connecting gear which is normally meshed with the walking tail end transmission gear at the head end is fixedly arranged on the walking transmission four-axis, and a walking tail end output gear which is normally meshed with the walking tail end transmission gear at the tail end is fixedly arranged on the walking output shaft.

As a preferred technical scheme, the walking tail end transmission device comprises at least two walking tail end duplicate wheels which are detachably and rotatably installed on the walking end box body, each walking tail end duplicate wheel comprises an upstream connecting gear and a downstream connecting gear which are relatively and fixedly arranged, the downstream connecting gear of each walking tail end duplicate wheel is in constant meshing arrangement with the upstream connecting gear of the walking tail end duplicate wheel adjacent to the downstream, a walking tail end connecting gear which is in constant meshing with the upstream connecting gear of the walking tail end duplicate wheel at the head end is fixedly arranged on the walking transmission four-shaft, and a walking tail end output gear which is in constant meshing with the downstream connecting gear of the walking tail end duplicate wheel at the tail end is fixedly arranged on the walking tail end output gear.

Preferably, the second-speed micro-tillage coupler includes second-speed micro-tillage coupling teeth fixedly provided on an end surface of the second-speed micro-tillage driven wheel facing the third-speed micro-tillage driven wheel, and the third-speed micro-tillage driving wheel is provided with second-speed micro-tillage coupling grooves corresponding to the second-speed micro-tillage coupling teeth.

Preferably, the mini-tilling end driving device includes a mini-tilling end driving sprocket fixedly provided on the mini-tilling driving four shafts, the mini-tilling output shaft is fixedly provided with a mini-tilling end driven sprocket, and a mini-tilling end driving chain is provided between the mini-tilling end driving sprocket and the mini-tilling end driven sprocket.

Preferably, the mini-tilling tail end transmission device comprises at least one mini-tilling tail end transmission gear which is detachably and rotatably installed in the mini-tilling end box body, the mini-tilling tail end transmission gears are sequentially meshed and connected, a mini-tilling tail end connecting gear which is normally meshed with the mini-tilling tail end transmission gear at the head end is fixedly arranged on the mini-tilling transmission four-shaft, and a mini-tilling tail end output gear which is normally meshed with the mini-tilling tail end transmission gear at the tail end is fixedly arranged on the mini-tilling output shaft.

As a preferable technical scheme, a mini-tillage output shaft sleeve is rotatably arranged on the mini-tillage end box body, the mini-tillage output shaft sleeve is detachably arranged on the mini-tillage output shaft sleeve, and a mini-tillage tail end transmission device is arranged between the mini-tillage transmission four-shaft and the mini-tillage output shaft sleeve; the walking output shaft sleeve is rotatably mounted on the walking end box body, the walking output shaft is detachably mounted on the walking output shaft sleeve, and the walking tail end transmission device is arranged between the tail end of the walking front end transmission device and the walking output shaft sleeve.

By adopting the technical proposal, the utility model is additionally provided with the micro-tillage transmission two shafts to carry out double-speed bidirectional transmission of the intermediate power, and has compact structure; and a first-stage three-speed change is formed between the first micro-tillage transmission shaft and the power input shaft, a second-stage two-speed change is formed between the third micro-tillage transmission shaft and the second micro-tillage transmission shaft, the six-speed change of forward rotation and the three-speed change of reverse rotation can be realized at the micro-tillage output shaft, the speed change modes are more, and the speed control requirements of users can be met.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

fig. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a schematic perspective view of the micro-tillage transmission part of the embodiment of the present invention;

FIG. 3 is a schematic perspective view of FIG. 2 from another perspective;

FIG. 4 is a schematic perspective view of a conventional walking transmission part of the present invention;

fig. 5 is a perspective view of fig. 4 from another angle.

In the figure: 1-a main box body; 11-a power input shaft; 12-a micro-tillage two-speed driving wheel; 13-micro-tillage three-speed driving wheel; 14-micro-tillage first speed driving wheel;

2-micro-tillage transmission of a first shaft; 21-micro-tillage second-speed driven wheel; 22-micro-tillage three-speed driven wheel; 23-micro-ploughing a first-speed driven wheel; 24-micro-tillage main speed changing groove; 25-micro-tillage two-speed combiner; 26-micro-tillage two-speed combination teeth; 27-micro-tillage two-speed combination groove;

3-micro-tillage transmission two-axis; 31-micro-tillage forward rotation first driving wheel; 32-micro-tillage forward rotation second driving wheel; 33-micro-tillage forward and reverse shifting groove;

4-micro-tillage transmission three-axis; 41-micro-tillage forward rotation first driven wheel; 42-micro-tillage forward rotation second driven wheel;

5-micro-tillage transmission four-axis; 51-micro-tillage forward rotation driving wheel; 52-micro-tillage reversal driving wheel; 53-mini-tilling end drive; 54-mini-tilling end drive sprocket; 55-mini-tilling end driven sprocket;

6-a walking transmission shaft; 61-a second-speed walking driven wheel; 62-three-speed walking driven wheel; 63-a traveling first-speed driven wheel; 64-a main walking speed-changing shifting groove; 65-a walking two-speed combiner; 66-walking two-speed engaging teeth; 67-walking two-speed coupling groove;

7-a walking transmission shaft; 71-walking forward rotation of the first driving wheel; 72-walking forward rotation second driving wheel; 73-walking forward and reverse rotation groove;

8-three walking transmission shafts; 81-walking forward rotation of the first driven wheel; 82-walking forward rotation of the second driven wheel;

9-a walking transmission four-axis; 92-a walking reverse rotation driving wheel; 93-a walking end transmission; 94-walking end drive gear; 95-the walking end is connected with a gear; 96-walking end output gear.

Detailed Description

The invention is further explained below with reference to the drawings and examples. In the following detailed description, exemplary embodiments of the invention are described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

As shown in fig. 1 to 5, the gearbox of the mini-tiller comprises a main box body 1, and a mini-tilling end box body and a walking end box body which are fixedly arranged with the main box body 1, wherein the overall structure of the main box body 1, the mini-tilling end box body and the walking end box body is easily obtained by a person skilled in the art according to the prior art, so the mini-tilling end box body and the walking end box body are not shown in the figure, and the main box body 1 is not all shown.

The main box body 1 is rotatably provided with a power input shaft 11, and the power input shaft 11 inputs the power of an engine. The mini-tiller end box body is rotatably provided with a mini-tiller output shaft, and the mini-tiller output shaft is used for connecting mini-tiller parts, such as rotary tillage, ridging, sowing and the like. And a walking output shaft is rotatably arranged on the walking end box body and is used for being connected with a walking part.

A micro-tillage transmission primary shaft 2, a micro-tillage transmission secondary shaft 3, a micro-tillage transmission tri-shaft 4 and a micro-tillage transmission four-shaft 5 are rotatably arranged in the main box body 1. A micro-tillage second-speed driven wheel 21 is rotatably mounted on the micro-tillage transmission shaft 2, and conventionally, the rotary mounting is realized by matching a shaft shoulder with a shaft sleeve or a check ring and the like; a second-speed mini-tilling driving wheel 12 normally meshed with the second-speed mini-tilling driven wheel 21 is fixedly arranged on the power input shaft 11.

A mini-tilling three-speed driving wheel 13 and a mini-tilling first-speed driving wheel 14 are sequentially fixed on one side of the mini-tilling second-speed driving wheel 12 on the power input shaft 11, a mini-tilling three-speed driven wheel 22 and a mini-tilling first-speed driven wheel 23 are slidably mounted on the mini-tilling transmission shaft 2 through splines, and a mini-tilling main speed changing shifting groove 24 is fixedly connected to the mini-tilling three-speed driven wheel 22 and the mini-tilling first-speed driven wheel 23 together. In the embodiment, three gear pairs are arranged between the micro-tillage transmission shaft 2 and the power input shaft 11 to form a first-stage three-speed change. The micro-tillage main speed-changing shifting groove 24 is used for being matched with a micro-tillage main speed-changing shifting fork, so that the micro-tillage main speed-changing shifting fork can shift the micro-tillage three-speed driven wheel 22 and the micro-tillage one-speed driven wheel 23 to slide, meshing transmission of different gear pairs is realized, and switching between first-stage three speeds is realized.

A second mini-tilling speed coupling 25 is provided between the second mini-tilling speed driven wheel 21 and the third mini-tilling speed driven wheel 22. The second-speed micro-tillage coupling 25 of the present embodiment includes second-speed micro-tillage coupling teeth 26 fixedly provided on an end surface of the second-speed micro-tillage driven wheel 21 facing the third-speed micro-tillage driven wheel 22, and the third-speed micro-tillage driving wheel 13 is provided with second-speed micro-tillage coupling grooves 27 corresponding to the second-speed micro-tillage coupling teeth 26.

When the two-speed transmission is needed in the primary speed change of the embodiment, the micro-tillage primary speed change shifting fork shifts the micro-tillage three-speed driven wheel 22 to slide to the micro-tillage two-speed driven wheel 21, and the micro-tillage two-speed combiner 25 is used for combining the micro-tillage three-speed driven wheel and the micro-tillage two-speed driven wheel; under the effect of the spline installation of the micro-tillage three-speed driven wheel 22, the micro-tillage two-speed driven wheel 21 and the micro-tillage transmission shaft 2 realize synchronous rotation. The second micro-tillage transmission shaft 3 is in gear transmission connection with the first micro-tillage transmission shaft 2, so that the second micro-tillage transmission shaft 12 and the second micro-tillage transmission driven wheel 21 transmit power to the second micro-tillage transmission shaft 3 at a first-stage speed-changing second-stage transmission ratio. At this time, of course, both the three-speed micro-tillage driven wheel 22 and the one-speed micro-tillage driven wheel 23 are in an unengaged state.

When the three-speed transmission is required in the first-speed transmission of the embodiment, the mini-tilling third-speed driven wheel 22 is driven to slide to a position meshed with the mini-tilling third-speed driving wheel 13, the mini-tilling second-speed coupler 25 is separated, and the mini-tilling second-speed driven wheel 21 has no power source and can only rotate along with the mini-tilling second-speed driving wheel 12. Thus, the three-speed micro-tillage driving wheel 13 and the three-speed micro-tillage driven wheel 22 transmit power to the two micro-tillage transmission shafts 3 at a transmission ratio of three speeds in one-stage speed change. Of course, the first mini-tilling speed driven wheel 23 is still in an unengaged state at this time. When the first-speed transmission is required in the first-speed transmission of the present embodiment, the principle is similar to the third-speed transmission, and the details are not repeated herein. Of course, when power transmission is not required, the three-speed micro-tillage driven wheel 22 and the first-speed micro-tillage driven wheel 23 may be moved to a position where they are neither engaged nor engaged.

In the embodiment, the three-speed micro-tillage driven wheel 22 and the one-speed micro-tillage driven wheel 23 are provided as a duplicate wheel, and the main micro-tillage speed-changing shifting groove 24 is formed between the two wheels. Of course, the three-speed micro-tillage driven wheel 22 and the one-speed micro-tillage driven wheel 23 may be double-layer wheels which are fixedly arranged relatively. In addition, the adjustment of the primary speed change gear is arranged on the micro-tillage transmission shaft 2, so that the gear of the micro-tillage output shaft can be controlled independently and is not influenced by walking speed change.

A micro-tillage forward rotation first driven wheel 41 and a micro-tillage forward rotation second driven wheel 42 are sequentially and fixedly arranged on the micro-tillage transmission three-shaft 4, a micro-tillage forward rotation first driving wheel 31 and a micro-tillage forward rotation second driving wheel 32 are slidably arranged on the micro-tillage transmission two-shaft 3 through splines, the micro-tillage forward rotation first driving wheel 31 can be meshed with the micro-tillage forward rotation first driven wheel 41, and the micro-tillage forward rotation second driving wheel 32 can be meshed with the micro-tillage forward rotation second driven wheel 42. The micro-tillage forward rotation first driving wheel 31 and the micro-tillage forward rotation second driving wheel 32 are fixedly connected with a micro-tillage forward and reverse rotation shifting groove 33, and the micro-tillage forward and reverse rotation shifting groove 33 is used for being matched with a micro-tillage auxiliary speed change shifting fork. Thus, two-stage double-speed change is formed between the micro-tillage transmission three-shaft 4 and the micro-tillage transmission two-shaft 3 by two gear pairs.

A micro-tillage forward rotation driving wheel 51 which is normally meshed with the micro-tillage forward rotation first driven wheel 41 or the micro-tillage forward rotation second driven wheel 42 is fixedly arranged on the micro-tillage transmission four-axis 5, so that power transmission can be always realized between the micro-tillage transmission three-axis 4 and the micro-tillage transmission four-axis 5. When the micro-tillage auxiliary speed-changing shifting fork shifts the micro-tillage forward and reverse shifting groove 33, so that the micro-tillage forward rotation first driving wheel 31 is meshed with the micro-tillage forward rotation first driven wheel 41, the micro-tillage transmission secondary shaft 3 forms two-stage first-speed transmission for forward rotation of the micro-tillage transmission four-shaft 5 according to the transmission ratio of the micro-tillage forward rotation first driving wheel 31 to the micro-tillage forward rotation first driven wheel 41. When the micro-tillage auxiliary speed-changing shifting fork shifts the micro-tillage forward and reverse shifting groove 33, so that the micro-tillage forward rotation second driving wheel 32 is meshed with the micro-tillage forward rotation second driven wheel 42, the micro-tillage transmission secondary shaft 3 forms two-stage two-speed transmission for the micro-tillage transmission four-shaft 5 forward rotation according to the transmission ratio of the micro-tillage forward rotation second driving wheel 32 to the micro-tillage forward rotation second driven wheel 42.

Through the structure, the micro-tillage transmission two-shaft 3 is used as a middle transition shaft, a first-stage three-speed change is formed between the micro-tillage transmission one-shaft 2 and the power input shaft 11, a second-stage two-speed change is formed between the micro-tillage transmission three-shaft 4 and the micro-tillage transmission two-shaft 3, six-speed change of forward rotation can be achieved at the micro-tillage output shaft, the speed change modes are more, and the speed control requirement of a user can be met.

A micro-tillage reverse-rotation driving wheel 52 which can be meshed with the micro-tillage forward-rotation first driving wheel 31 or the micro-tillage forward-rotation second driving wheel 32 is further fixedly arranged on the micro-tillage transmission four-axis 5, and the embodiment shows that the micro-tillage reverse-rotation driving wheel 52 can be meshed with the micro-tillage forward-rotation second driving wheel 32. When the micro-tillage auxiliary speed change shifting fork shifts the micro-tillage forward and reverse shifting groove 33, so that the micro-tillage forward and reverse second driving wheel 32 is meshed with the micro-tillage reverse transmission wheel 52, the micro-tillage transmission four-axis 5 forms reverse rotation due to lack of transmission of a gear on the original micro-tillage transmission three-axis 4, and can utilize the one-stage three-speed change between the micro-tillage transmission one-axis 2 and the power input axis 11 to form three-speed change of micro-tillage output axis reverse rotation, the micro-tillage reverse rotation speed change is more, and the speed control requirement of a user can be met. Of course, when the forward mini-tilling rotation second driving wheel 32 is meshed with the reverse mini-tilling rotation driving wheel 52, the forward mini-tilling rotation first driving wheel 31 is not meshed with the forward mini-tilling rotation first driven wheel 41, and the forward mini-tilling rotation second driving wheel 32 is not meshed with the forward mini-tilling rotation second driven wheel 42.

A mini-tilling end transmission device 53 is arranged between the mini-tilling transmission four-axis 5 and the mini-tilling output shaft, and the mini-tilling end transmission device 53 finally transmits power to the mini-tilling output shaft. The mini-tilling end driving device 53 of the present embodiment includes a mini-tilling end driving sprocket 54 fixedly installed on the mini-tilling driving four-axis 5, a mini-tilling end driven sprocket 55 fixedly installed on the mini-tilling output shaft, and a mini-tilling end driving chain installed between the mini-tilling end driving sprocket 54 and the mini-tilling end driven sprocket 55. Namely, the mini-tiller end transmission device 53 in the embodiment directly adopts a chain transmission structure, and has the advantages of simple and reliable structure and low cost.

In addition, the mini-tilling end transmission device 53 of the present embodiment may also adopt another structure, that is, the mini-tilling end transmission device 53 includes at least one mini-tilling end transmission gear detachably rotatably installed in the mini-tilling end box, the mini-tilling end transmission gears are sequentially engaged and connected, a mini-tilling end connection gear normally engaged with the mini-tilling end transmission gear at the head end is fixedly provided on the mini-tilling transmission four-axis 5, and a mini-tilling end output gear normally engaged with the mini-tilling end transmission gear at the tail end is fixedly provided on the mini-tilling output shaft. This mode is equivalent to the micro-tillage transmission four-shaft 5 which transmits power to the micro-tillage output shaft in turn through a plurality of gears, and the transmission is reliable and efficient. This structural scheme also should be within the scope of protection of the utility model.

The mini-tiller output shaft sleeve is rotatably mounted on the mini-tiller end box body, and the mini-tiller output shaft is detachably mounted on the mini-tiller output shaft sleeve. For the present embodiment, the mini-tilling end transmission 53 is arranged between the mini-tilling transmission four shafts 5 and the mini-tilling output shaft sleeve. So the output shaft of ploughing a little can conveniently be changed into the porous axle of different length, conveniently realizes different cutter intervals etc. this makes this embodiment can satisfy the user demand in different areas better.

A walking front end transmission device is installed in the main box body 1, and a walking tail end transmission device 93 is arranged between the tail end of the walking front end transmission device and the walking output shaft. The walking output shaft obtains power through the walking front end transmission device and the walking tail end transmission device 93.

In this embodiment, the walking front end transmission device comprises a walking transmission shaft 6, a walking transmission shaft 7, a walking transmission shaft 8 and a walking transmission shaft 9 which are rotatably arranged in the main box body 1. A traveling second-speed driven wheel 61 is rotatably mounted on the traveling transmission shaft 6, and a traveling second-speed driving wheel which is constantly meshed with the traveling second-speed driven wheel 61 is fixedly arranged on the power input shaft 11. A three-speed walking driving wheel and a first-speed walking driving wheel are sequentially fixed on one side of the second-speed walking driving wheel on the power input shaft 11, a three-speed walking driven wheel 62 and a first-speed walking driven wheel 63 are slidably mounted on the first walking transmission shaft 6 through splines, and the three-speed walking driven wheel 62 and the first-speed walking driven wheel 63 are fixedly connected with a main walking speed changing shifting groove 64. A second-speed traveling coupling 65 is provided between the second-speed traveling driven wheel 61 and the third-speed traveling driven wheel 62. The second-speed walking coupling 65 includes second-speed walking coupling teeth 66 fixedly provided on an end surface of the second-speed walking driven wheel 61 facing the third-speed walking driven wheel 62, and second-speed walking coupling grooves 67 corresponding to the second-speed walking coupling teeth 66 are provided on the third-speed walking driving wheel. The walking transmission shaft 6 is in gear transmission connection with the walking transmission shaft 7.

In this embodiment, a first-stage three-speed transmission for walking is also formed between the walking transmission shaft 6 and the power input shaft 11, and the structural principle thereof is the same as that of the first micro-tillage transmission shaft 2, which is easily understood by those skilled in the art from the foregoing, and will not be described herein again. In this embodiment, the two-speed mini-tiller driving wheel 12 also serves as the two-speed walking driving wheel, the three-speed mini-tiller driving wheel 13 also serves as the three-speed walking driving wheel, and the one-speed mini-tiller driving wheel 14 also serves as the one-speed walking driving wheel. Therefore, the gear arrangement on the power input shaft 11 can be greatly simplified, the first-stage three-speed change of walking and micro-tillage is independently controlled on respective transmission shafts, the speed change adjustment of walking and micro-tillage cannot interfere with each other, and the use is convenient.

A first walking forward rotation driven wheel 81 and a second walking forward rotation driven wheel 82 are sequentially and fixedly arranged on the three walking transmission shafts 8, a first walking forward rotation driving wheel 71 and a second walking forward rotation driving wheel 72 are slidably arranged on the two walking transmission shafts 7 through splines, the first walking forward rotation driving wheel 71 and the second walking forward rotation driving wheel 72 are jointly and fixedly connected with a walking forward and reverse rotation shifting groove 73, a gear transmission connection device with the three walking transmission shafts 8 is fixedly arranged on the four walking transmission shafts 9, and a walking reverse rotation driving wheel 92 which can be meshed with the first walking forward rotation driving wheel 71 or the second walking forward rotation driving wheel 72 is fixedly arranged on the four walking transmission shafts 9. The forward rotation two-speed change is formed at the position of the walking transmission three-shaft 8 and the walking transmission two-shaft 7, the forward rotation six-speed change and the reverse rotation three-speed change are finally formed at the position of the walking transmission four-shaft 9, the speed change is increased, and the speed control requirement of a user can be met. The structural principle of speed change among the four walking transmission shafts 9, the three walking transmission shafts 8 and the two walking transmission shafts 7 is similar to that of speed change at the four micro-tillage transmission shafts 5, the three micro-tillage transmission shafts 4 and the two micro-tillage transmission shafts 3, and the only difference is that the four walking transmission shafts 9 and the three walking transmission shafts 8 are in constant meshing transmission through other gear pairs. Even so, the structural principle of speed change among the four traveling transmission shafts 9, the three traveling transmission shafts 8 and the two traveling transmission shafts 7 is easily understood by those skilled in the art from the foregoing content, and is not described herein again.

The walking end transmission device 93 is arranged between the walking transmission four-shaft 9 and the walking output shaft, and the walking end transmission device 93 finally transmits power to the walking output shaft. In this embodiment, the walking end transmission device 93 comprises at least one walking end transmission gear 94 which is detachably installed on the walking end box body in a rotating mode, a walking end connecting gear 95 which is normally meshed with the walking end transmission gear 94 and is fixedly arranged on the walking transmission four-axis 9, and a walking end output gear 96 which is normally meshed with the walking end transmission gear 94 and is fixedly arranged on the walking output shaft and is connected with the head end. Namely, the walking end transmission device 93 of the embodiment directly adopts a structure of sequential power transmission of a plurality of gears, and the transmission is reliable and efficient.

In addition, the walking end transmission 93 described in this embodiment may also adopt another structure. The walking tail end transmission device 93 comprises at least two walking tail end duplex wheels which are detachably and rotatably arranged on the walking end box body, and the walking tail end duplex wheels are preferably duplex wheels formed by welding; each walking tail end duplex wheel comprises an upstream connecting gear and a downstream connecting gear which are relatively fixedly arranged, the downstream connecting gear of each walking tail end duplex wheel is normally meshed with the upstream connecting gear of the walking tail end duplex wheel adjacent to the downstream, a walking tail end connecting gear 95 which is normally meshed with the upstream connecting gear of the head end walking tail end duplex wheel is fixedly arranged on the walking transmission four-shaft 9, and a walking tail end output gear 96 which is normally meshed with the downstream connecting gear of the tail end walking tail end duplex wheel is fixedly arranged on the walking tail end output gear 96. The mode adopts a plurality of duplicate wheels to carry out power transmission, and different transmission ratios can be realized between the duplicate wheels by self replacement, so that one-level three-speed change and two-level two-speed change of walking can be matched, more ideal speed regulation is realized, and the use is favorably adapted to more terrain and geological conditions. Of course, the walking end gear 93 of this embodiment may be arranged by referring to the scheme that a plurality of end gears are sequentially engaged at the micro-tillage end gear 53.

In addition, this embodiment also rotate on the walking end box and install walking output shaft cover, demountable installation is sheathe in to the walking output shaft. Namely, the walking end transmission device 53 is also arranged between the four walking transmission shafts 9 and the walking output shaft sleeve in the embodiment. So the walking output shaft also can conveniently be changed into the porous axle of different length, conveniently realizes the interval of different wheels etc. this also makes this embodiment can satisfy the user demand in different areas better.

No matter the embodiment is micro-ploughed or walks, the positive rotation six-speed change and the reverse rotation three-speed change are realized, the speed change modes are greatly increased, and the speed control requirements of users are favorably met. In the embodiment, nine-shaft transmission is integrated in the main box body 1, so that the structure is compact; the speed change between micro-tillage and walking is independently controlled, the micro-tillage and walking are not interfered with each other, and the use is more convenient and reliable.

The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. Plough quick-witted gearbox a little, including the main tank body and with the integrative fixed end box body of ploughing a little, the walking end box body that sets up of main tank body, rotate on the main tank body and install power input shaft, it installs the output shaft of ploughing a little to rotate on the end box body of ploughing a little, rotate on the end box body of walking and install walking output shaft, its characterized in that:

a first micro-tillage transmission shaft, a second micro-tillage transmission shaft, a third micro-tillage transmission shaft and a fourth micro-tillage transmission shaft are rotatably mounted in the main box body, a second micro-tillage speed driven wheel is rotatably mounted on the first micro-tillage transmission shaft, and a second micro-tillage speed driving wheel which is normally meshed with the second micro-tillage speed driven wheel is fixedly arranged on the power input shaft; a micro-tillage three-speed driving wheel and a micro-tillage first-speed driving wheel are sequentially fixed on one side of the micro-tillage second-speed driving wheel on the power input shaft, a micro-tillage three-speed driven wheel and a micro-tillage first-speed driven wheel are slidably mounted on the micro-tillage first-speed driving shaft through splines, and a micro-tillage main speed changing shifting groove is fixedly connected to the micro-tillage three-speed driven wheel and the micro-tillage first-speed driven wheel together; a second mini-tillage speed combiner is arranged between the second mini-tillage speed driven wheel and the third mini-tillage speed driven wheel; the micro-tillage transmission secondary shaft is in gear transmission connection with the micro-tillage transmission primary shaft, a micro-tillage forward rotation first driven wheel and a micro-tillage forward rotation second driven wheel are sequentially and fixedly arranged on the micro-tillage transmission tertiary shaft, a micro-tillage forward rotation first driving wheel and a micro-tillage forward rotation second driving wheel are slidably arranged on the micro-tillage transmission secondary shaft through splines, the micro-tillage forward rotation first driving wheel and the micro-tillage forward rotation second driving wheel are jointly and fixedly connected with a micro-tillage forward rotation shifting groove, a micro-tillage forward rotation driving wheel which is normally meshed with the micro-tillage forward rotation first driven wheel or the micro-tillage forward rotation second driven wheel is fixedly arranged on the micro-tillage transmission quaternary shaft, and a micro-tillage reverse rotation driving wheel which is meshed with the micro-tillage forward rotation first driving wheel or the micro-tillage forward rotation second driving wheel is also fixedly arranged on the micro-tillage transmission quaternary shaft; a mini-tillage tail end transmission device is arranged between the mini-tillage transmission four-axis and the mini-tillage output shaft;

and a walking front-end transmission device is arranged in the main box body, and a walking tail-end transmission device is arranged between the tail end of the walking front-end transmission device and the walking output shaft.

2. The gearbox of micro-cultivator of claim 1, wherein: the walking front-end transmission device comprises a walking transmission primary shaft, a walking transmission secondary shaft, a walking transmission tertiary shaft and a walking transmission quaternary shaft which are rotatably arranged in the main box body; a walking two-speed driven wheel is rotatably mounted on the walking transmission shaft, and a walking two-speed driving wheel which is normally meshed with the walking two-speed driven wheel is fixedly arranged on the power input shaft; a walking three-speed driving wheel and a walking first-speed driving wheel are sequentially fixed on one side, located on the walking second-speed driving wheel, of the power input shaft, a walking three-speed driven wheel and a walking first-speed driven wheel are slidably mounted on the walking transmission shaft through splines, and the walking three-speed driven wheel and the walking first-speed driven wheel are fixedly connected with a walking main speed changing shifting groove; a second-speed walking connector is arranged between the second-speed walking driven wheel and the third-speed walking driven wheel; the walking transmission secondary shaft is in gear transmission connection with the walking transmission primary shaft, a walking forward rotation first driven wheel and a walking forward rotation second driven wheel are sequentially and fixedly arranged on the walking transmission tertiary shaft, a walking forward rotation first driving wheel and a walking forward rotation second driving wheel are slidably arranged on the walking transmission secondary shaft through splines, the walking forward rotation first driving wheel and the walking forward rotation second driving wheel are jointly and fixedly connected with a walking forward and reverse rotation shifting groove, the walking transmission quaternary shaft is in gear transmission connection with the walking transmission tertiary shaft, and a walking reverse rotation driving wheel which can be meshed with the walking forward rotation first driving wheel or the walking forward rotation second driving wheel is fixedly arranged on the walking transmission quaternary shaft; and the walking tail end transmission device is arranged between the walking transmission four-axis and the walking output shaft.

3. The gearbox of the mini-tiller of claim 2, wherein: the two-speed micro-tillage driving wheel is also used as the two-speed walking driving wheel, the three-speed micro-tillage driving wheel is also used as the three-speed walking driving wheel, and the one-speed micro-tillage driving wheel is also used as the one-speed walking driving wheel.

4. The gearbox of the mini-tiller of claim 2, wherein: the walking second-speed combiner comprises walking second-speed combining teeth fixedly arranged on the end face, facing the walking third-speed driven wheel, of the walking second-speed driven wheel, and walking second-speed combining grooves corresponding to the walking second-speed combining teeth are formed in the walking third-speed driving wheel.

5. The gearbox of the mini-tiller of claim 2, wherein: the walking tail end transmission device comprises at least one walking tail end transmission gear which is detachably installed on the walking end box body in a rotating mode, a walking tail end connection gear which is normally meshed with the walking tail end transmission gear is fixedly arranged on the walking transmission four-axis, and a walking tail end output gear which is normally meshed with the walking tail end transmission gear is fixedly arranged on the walking output shaft.

6. The gearbox of the mini-tiller of claim 2, wherein: the walking tail end transmission device comprises at least two walking tail end duplicate wheels which are detachably and rotatably installed on the walking end box body, each walking tail end duplicate wheel comprises an upstream connecting gear and a downstream connecting gear which are relatively fixedly arranged, the downstream connecting gear of each walking tail end duplicate wheel is adjacent to the downstream of the walking tail end duplicate wheel in a normally meshed mode, a walking tail end connecting gear which is normally meshed with the upstream connecting gear of the head end walking tail end duplicate wheel is fixedly arranged on the walking transmission four-axis, and a walking tail end output gear which is normally meshed with the downstream connecting gear of the walking tail end duplicate wheel is fixedly arranged on the walking tail end output gear.

7. The gearbox of micro-cultivator of claim 1, wherein: the second-speed micro-tillage combiner comprises second-speed micro-tillage combining teeth fixedly arranged on the end face, facing the third-speed micro-tillage driven wheel, of the second-speed micro-tillage driven wheel, and second-speed micro-tillage combining grooves corresponding to the second-speed micro-tillage combining teeth are formed in the third-speed micro-tillage driving wheel.

8. The gearbox of micro-cultivator of claim 1, wherein: the mini-tilling tail end transmission device comprises a mini-tilling tail end driving chain wheel fixedly arranged on the mini-tilling transmission four-shaft, a mini-tilling tail end driven chain wheel is fixedly arranged on a mini-tilling output shaft, and a mini-tilling tail end transmission chain is arranged between the mini-tilling tail end driving chain wheel and the mini-tilling tail end driven chain wheel.

9. The gearbox of micro-cultivator of claim 1, wherein: the mini-tilling tail end transmission device comprises at least one mini-tilling tail end transmission gear which is detachably and rotatably installed in the mini-tilling end box body, the mini-tilling tail end transmission gears are sequentially meshed and connected, a mini-tilling tail end connecting gear which is normally meshed with the mini-tilling tail end transmission gear at the head end is fixedly arranged on a mini-tilling transmission four-axis, and a mini-tilling tail end output gear which is normally meshed with the mini-tilling tail end transmission gear at the tail end is fixedly arranged on a mini-tilling output shaft.

10. The gearbox of micro-cultivator of claim 1, wherein: a mini-tillage output shaft sleeve is rotatably arranged on the mini-tillage end box body, the mini-tillage output shaft sleeve is detachably arranged on the mini-tillage output shaft sleeve, and a mini-tillage tail end transmission device is arranged between the mini-tillage transmission four-shaft and the mini-tillage output shaft sleeve; the walking output shaft sleeve is rotatably mounted on the walking end box body, the walking output shaft is detachably mounted on the walking output shaft sleeve, and the walking tail end transmission device is arranged between the tail end of the walking front end transmission device and the walking output shaft sleeve.