CN220830656U - Four-wheel-drive multifunctional mini-tiller - Google Patents

Abstract

The utility model discloses a four-wheel-drive multifunctional mini-tiller which comprises a rack, a power source, a main gearbox, a rear walking box and a front walking box, wherein the power source is connected with the input end of the main gearbox; the method is characterized in that: the clutch, the universal joint and the same-speed and different-speed gearbox are also included; the first output end of the main gearbox is connected with the input end of the rear traveling box; the second output end of the main gearbox is connected with the input end of the clutch; the clutch output end is connected with the input end of the same-speed and different-speed gearbox through a universal joint; the output end of the same-speed and different-speed gearbox is connected with the input end of the front traveling box; the same-speed and different-speed gear box is provided with a same-speed working gear and a different-speed working gear; a rear wheel or a cutter is arranged on the output end of the rear walking box; the front wheel is arranged on the output end of the front walking box. The utility model can be used for transportation and farmland work at the same time, and has the advantages of convenient use, wide application range, multiple functions and the like.

Description

Four-wheel-drive multifunctional mini-tiller

Technical Field

The utility model relates to a four-wheel-drive multifunctional mini-tiller.

Background

At present, the agricultural mini-tiller mainly has the functions of tilling (weeding and the like), and basically has idle time except more utilization in spring and autumn, and is transported daily or frequently in the agricultural activity process, and the output rotating speeds of the front and rear traveling boxes of the mini-tiller are different. Specifically, the output rotating speed of a front traveling box of the mini-tiller is low and is responsible for traveling; the output rotating speed of the rear traveling box of the mini-tiller is high and is responsible for the work of a cutter; the four-wheel drive type motor is not suitable for four-wheel drive transportation conditions because of different front and rear output rotating speeds (namely front low and rear high).

The existing agricultural small four-wheel transport vehicle generally adopts a front drive or a rear drive, and generally cannot realize the four-wheel drive. The front and rear wheel speeds of the known vehicle (such as an off-road vehicle) full-time four-wheel drive system are basically the same, so that the front and rear output speeds are the same, and the working requirements of low front and high rear of the micro-cultivator speed cannot be met, so that the micro-cultivator is not suitable for the working condition of cultivated land.

Therefore, the prior art cannot be used for transporting and ploughing (or weeding and the like) working conditions, and has the problems of small application range and single function.

Disclosure of utility model

The utility model provides a four-wheel-drive multifunctional mini-tiller, which solves the problems that the prior art cannot be used for transporting and tilling (or weeding and the like) working conditions, and has a small application range and a single function.

In order to achieve the above purpose, the technical scheme of the utility model is as follows: the four-wheel-drive multifunctional mini-tiller comprises a rack, a power source, a main gearbox, a rear walking box, a front walking box and an armrest frame, wherein the power source is connected with the input end of the main gearbox; the first output end of the main gearbox is connected with the input end of the rear traveling box; the method is characterized in that: the clutch, the universal joint and the same-speed and different-speed gearbox are also included; the first output end of the main gearbox is connected with the input end of the rear traveling box; the second output end of the main gearbox is connected with the input end of the clutch; the clutch output end is connected with the input end of the same-speed and different-speed gearbox through a universal joint; the output end of the same-speed and different-speed gearbox is connected with the input end of the front traveling box; the same-speed and different-speed gear box is provided with a same-speed working gear and a different-speed working gear, the transmission ratio of the same-speed working gear is 1 when the same-speed working gear is switched to, and the transmission ratio of the same-speed working gear is larger than 1 when the same-speed working gear is switched to; a rear wheel or a cutter is arranged on the output end of the rear walking box; the front wheel is arranged on the output end of the front walking box. By adopting the scheme, the following various working modes can be realized:

As a first mode of operation (tilling mode): firstly, installing a cutter on the output end of the rear traveling box, and switching the same-speed and different-speed gear box to a different-speed working gear, wherein the transmission ratio of the same-speed and different-speed gear box is larger than 1 at the moment to be output in a decelerating way; then restarting the work, the power source is driven by the main gearbox to work with the rear walking box and the front walking box simultaneously, and the cutter on the rear walking box and the front wheel of the front walking box change into differential motion due to the fact that the same-speed gearbox is switched to a different-speed working gear (the transmission ratio is larger than 1), the front wheel of the rear walking box is output in a decelerating mode, so that the front wheel rotates at a lower speed to work as walking, and the cutter rotates at a higher speed to work as cultivated land (or weeding and the like).

As a second mode of operation (four-wheel drive mode of transportation): firstly, mounting a rear wheel on the output end of the rear traveling box, and switching the same-speed and different-speed gear box to a same-speed working gear, wherein the transmission ratio of the same-speed and different-speed gear box is equal to 1 and the same-speed and different-speed gear box is output at a constant speed; then restarting the work, the power source drives the rear traveling box and the front traveling box to work simultaneously through the main gearbox, and the same speed gear box is switched to the same speed working gear (the transmission ratio is equal to 1), so that the rear wheel on the rear traveling box and the front wheel of the front traveling box move at the same speed, the front wheel and the rear wheel rotate at the same speed and work simultaneously, the full-time four-wheel drive work can be realized, the full-time four-wheel drive type vehicle can be suitable for the use condition under the transportation (loaded) state, the carrying capacity can be improved, and the full-time four-wheel drive type vehicle can be more suitable for more complex road conditions.

Therefore, the technical scheme can realize the multi-mode work, can realize dual purposes of transportation and cultivation, can greatly increase the utilization rate of the machine and reduce the use cost and labor force of users. And further can solve the problems that the prior art can not be used for transporting and ploughing (or weeding and the like) working conditions, has small application range and single function.

Preferably, the same-speed and different-speed gearbox comprises a first box body, a first input shaft, a first output shaft and an intermediate shaft; the first input shaft is provided with a first driving tooth; the first output shaft is provided with an annular gear and first driven teeth; the intermediate shaft has input teeth and output teeth; in the same-speed working gear, the first driving tooth is simultaneously meshed with the input tooth and the annular gear) and the first driven tooth is disengaged from the output tooth; the first driving teeth are disengaged from the inner gear ring in the different-speed working gear; the first driving teeth intermesh with the input teeth and the first driven teeth intermesh with the output teeth.

Preferably, the power source is an electric motor or an engine.

Preferably, the main gearbox is located above the rear travelling box.

Preferably, the front traveling case comprises a front fixed case body, a front steering case body, a front transmission shaft, a front output shaft, a front driving bevel gear and a front driven bevel gear; the steering box body is in rotatable fit with the fixed box body; the front transmission shaft is vertically and rotatably arranged in the steering box body; the front output shaft is horizontally and rotatably arranged on the steering box body; the front driving bevel gear and the front driven bevel gear are positioned in the front steering box body and meshed with each other; the lower end of the front transmission shaft is coaxially connected with the front drive bevel gear; the front drive bevel gear is coaxially connected with the front output shaft; the front wheel is mounted on the front output shaft.

Preferably, the upper end of the front transmission shaft is connected with the output end of the same-speed and different-speed gearbox through a first bevel gear assembly.

Further, the steering shaft of the armrest frame is rotatably arranged on the main gearbox or the frame; the steering shaft is also connected with the front steering box body through a linkage mechanism, and can enable the front steering box body to rotate in a linkage way when the armrest frame rotates.

Preferably, the linkage mechanism comprises a first transverse link, a first longitudinal link, a second vertical link, a second longitudinal link, a second transverse link, a steering rod and a direction tooth;

one end of the first transverse connecting rod is fixedly connected with the steering shaft; the other end of the first transverse connecting rod is hinged with one end of the first longitudinal connecting rod; the other end of the first longitudinal connecting rod is hinged with the upper end of the second vertical connecting rod; the middle part of the second vertical connecting rod is hinged with the frame; the lower end of the second vertical connecting rod is hinged with one end of the second longitudinal connecting rod; the other end of the second longitudinal connecting rod is hinged with one end of the second transverse connecting rod; the other end of the second transverse connecting rod is fixedly connected with the upper end of the steering rod; the steering rod is rotatably arranged on the front fixed box body; the direction teeth are positioned in the front fixing box body and are coaxially fixed with the steering rod; steering teeth are fixedly arranged on the front steering box body; the steering teeth intermesh with the direction teeth.

Preferably, the rear walking box comprises a rear box body, a rear transmission shaft, a rear output shaft, a rear driving bevel gear and a rear driven bevel gear; the rear transmission shaft is vertically and rotatably arranged in the rear box body; the rear output shaft is horizontally and rotatably arranged on the rear box body; the rear driving bevel gear and the rear driven bevel gear are positioned in the rear box body and meshed with each other; the lower end of the rear transmission shaft is coaxially connected with the rear drive bevel gear; the rear driven bevel gear is coaxially connected with the rear output shaft; the rear wheel or cutter is mounted on the rear output shaft.

Preferably, the first output end of the main gearbox is connected with the upper end of the rear transmission shaft through a second bevel gear assembly.

The utility model has the beneficial effects that:

firstly, the utility model can realize dual purposes of transportation and cultivation, can fully retain the functions of the original mini-tiller, simultaneously increases the transportation functions which the original mini-tiller does not have, can greatly increase the utilization rate of the machine, and reduces the use cost and labor force of users;

Secondly, the clutch is arranged between the main gearbox and the universal joint and used for connecting or interrupting transmission power, so that the working state of the output ends of the front and rear traveling boxes can be controlled simultaneously, and further, the control of speed reduction or stopping is realized;

Thirdly, as the universal joint is arranged between the clutch and the same-speed and different-speed gearbox, the direction and the angle between the clutch and the same-speed and different-speed gearbox can be changed within a certain range during transmission, so that the utility model can meet the angle change caused by power transmission, adaptation to steering and up-down jumping generated during working operation, and can be better suitable for complex and various working conditions such as transportation, cultivation and weeding under the scenes of hillsides, fields, uneven pavement and the like;

Fourth, the armrest frame is connected with the front steering box body through the linkage mechanism, and can enable the front steering box body to rotate in a linkage way when the armrest frame rotates, so that the walking and working direction control of the mini-tiller can be controlled, and a user can control the direction of the front wheels in the rear direction, so that the mini-tiller is safer and more convenient to operate.

Drawings

FIG. 1 is a top view of a four-wheel drive multi-functional mini tiller of the present utility model.

FIG. 2 is a perspective view of a four-wheel drive multifunctional mini-tiller of the present utility model.

FIG. 3 is a front view of the four-wheel drive multifunctional mini-tiller of the present utility model in a cutaway view.

Fig. 4 is a perspective view of the four-wheel drive multifunctional mini-tiller in the utility model when the interior is cut away.

Fig. 5 is a front view of the four-wheel-drive multifunctional mini tiller in steering control according to the present utility model.

Fig. 6 is a partial enlarged view of fig. 5a when shifting to the different-speed operation range.

Fig. 7 is a state diagram of the same-speed transmission engaged when the same-speed transmission is shifted to the different-speed operation range.

Fig. 8 is a partial enlarged view of fig. 5a when shifting to the same-speed operation range.

Fig. 9 is a state diagram of the same-speed transmission engaged when the same-speed transmission is shifted to the same-speed operation range.

Fig. 10 is a perspective view of the main gearbox (without the main housing 3-1).

FIG. 11 is a perspective view of a four-wheel drive multi-functional mini tiller in steering control according to the present utility model.

Fig. 12 is a partial enlarged view at B in fig. 11.

FIG. 13 is a view showing an operation state of the four-wheel-drive multifunctional mini tiller for transportation according to the present utility model.

FIG. 14 is a view showing an operation state of the four-wheel-drive multifunctional mini-tiller according to the present utility model when the tiller is used for tilling a field.

Detailed Description

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

Examples: referring to fig. 1-14, a four-wheel-drive multifunctional mini-tiller comprises a frame 1, a power source 2, a main gearbox 3, a rear traveling box 4, a front traveling box 5, an armrest frame 12, a clutch 6, a universal joint 7 and a same-speed and different-speed gearbox 8.

Wherein, the power source 2 adopts a motor or engine diesel oil or gasoline or other power.

Referring to fig. 3-4 and 12, the main gear box 3 includes a main box body 3-1, and a second input shaft 3-2 and a second output shaft 3-3 rotatably installed in the main box body 3-1 and parallel to each other; the main box body 3-1 is fixed on the frame 1; the second input shaft 3-2 is provided with a first gear driving tooth 3-21, a second gear driving tooth 3-22 and a third gear driving tooth 3-23, wherein the diameter sizes of the first gear driving tooth, the second gear driving tooth 3-22 and the third gear driving tooth 3-23 are sequentially reduced; the second output shaft 3-3 is provided with a first gear driven tooth 3-31, a second gear driven tooth 3-32 and a third gear driven tooth 3-33, the diameter sizes of which are sequentially increased. It has three working blocks when working: the first gear is a first gear when the first gear driving teeth 3-21 are meshed with the first gear driven teeth 3-31; the second gear is a second gear when the second gear driving teeth 3-22 are meshed with the second gear driven teeth 3-32; the third gear is a third gear when the third gear driving teeth 3-23 and the third gear driven teeth 3-33 are meshed with each other. Therefore, the main transmission 3 can realize three-gear speed change and output, namely high, medium and low gears. Wherein the rear end of the second output shaft 3-3 serves as a first output end of the main gear box 3, and the front end of the second output shaft 3-3 serves as a second output end of the main gear box 3. The rear end of the second input shaft 3-2 serves as the main gearbox 3 input.

Wherein the power source 2 is connected with the input end of the main gearbox 3 (namely the rear end of the second input shaft 3-2); the first output end of the main gearbox 3 (namely the rear end of the second output shaft 3-3) is connected with the input end of the rear traveling box 4; the second output of the main gearbox 3, i.e. the front end of the second output shaft 3-3, is connected to the input of the clutch 6.

The output end of the clutch 6 is connected with the input end of the same-speed differential gearbox 8 through a universal joint 7; the output end of the same-speed and different-speed gearbox 8 is connected with the input end of the front traveling box 5.

The clutch 6 is arranged between the main gearbox 3 and the universal joint 7 and used for combining or separating transmission power, so that the working state of the output ends of the front and rear traveling boxes can be controlled simultaneously, and further, the control of speed reduction or stopping is realized.

In addition, because the universal joint 7 is arranged between the clutch 6 and the same-speed and different-speed gearbox 8, the direction and the angle between the clutch 6 and the same-speed and different-speed gearbox 8 can be changed within a certain range during transmission, the angle change caused by up-and-down jumping generated during power transmission, adaptation steering and working operation can be met, and the device is better suitable for complex and various working conditions such as transportation, farmland weeding and the like under the scenes of hillside, field, uneven road surface and the like.

Wherein the same-speed and different-speed gear box 8 has a same-speed working gear and a different-speed working gear, the transmission ratio is 1 when the same-speed working gear is switched, and the transmission ratio is greater than 1 when the different-speed working gear is switched.

In particular, referring to fig. 9-10, the speed change box 8 includes a first box 8-1, and a first input shaft 8-2, a first output shaft 8-3, and an intermediate shaft 8-4 are rotatably mounted on the first box 8-1; the first input shaft 8-2 and the first output shaft 8-3 are concentrically distributed; the first input shaft 8-2 is provided with a first driving tooth 8-21; the first output shaft 8-3 is provided with an annular gear 8-31 and first driven teeth 8-32; the intermediate shaft 8-4 has input teeth 8-41 and output teeth 8-42. The input teeth 8-41 are smaller in diameter than the first drive teeth 8-21 and the output teeth 8-42 are smaller in diameter than the first driven teeth 8-32. When in use, the following working state switching can be realized by pulling (such as a fork pulling mechanism) the first output shaft 8-3 to axially slide:

(1) Different speed working gear: referring to fig. 6 to 7, the first driving teeth 8 to 21 are disengaged from the ring gear 8 to 31 in the different gear operation; the first driving teeth 8-21 intermesh with the input teeth 8-41 and the first driven teeth 8-32 intermesh with the output teeth 8-42. At this time, the first driving teeth 8-21 drive the input teeth 8-41 to rotate and the power is transmitted to the intermediate shaft 8-4, and then drive the first driven teeth 8-32 to rotate through the output teeth 8-42, and the two-stage deceleration output is realized at this time because the diameter of the input teeth 8-41 is larger than the diameter of the first driving teeth 8-21 and the diameter of the output teeth 8-42 is smaller than the diameter of the first driven teeth 8-32; in this embodiment, the gear ratio is 6 (i.e., 2*3).

(2) Same-speed working gear: referring to fig. 8-9, in the same-speed operation gear, the first driving teeth 8-21 are simultaneously intermeshed with the input teeth 8-41 and the ring gear 8-31 and the first driven teeth 8-32 are disengaged from the output teeth 8-42. At this time, the first input shaft 8-2 and the first output shaft 8-3 move coaxially and are driven at the same speed.

The rear end of the first input shaft 8-2 is used as an input end of the same-speed and different-speed gearbox 8 and is connected with an output end of the universal joint 7; and the front end of the first output shaft 8-3 serves as the output end of the differential speed gearbox 8.

Referring to fig. 3-4, the main gearbox 3 is preferably located above the rear travelling box 4.

Referring to fig. 3, the front traveling case 5 includes a front fixed case 5-1, a front steering case 5-2, a front driving shaft 5-3, a front output shaft 5-4, a front drive bevel gear 5-5, and a front driven bevel gear 5-6;

Referring to fig. 3-5, the front fixing case 5-1 is fixed on the frame 1, and the steering case 5-2 is rotatably matched with the fixing case 5-1; the front drive shaft 5-3 is vertically and rotatably installed in the steering box 5-2 and concentric with the rotation center of the steering box 5-2. The upper part of the steering box body 5-2 is provided with a cylinder part; the diameter of the cylinder part is inserted into the fixed box body 5-1 and is matched with the fixed box body in a rotating way; the middle part of the front transmission shaft 5-3 is in running fit with the inner hole of the cylinder part; the front output shaft 5-4 is horizontally and rotatably arranged on the steering box body 5-2; the front driving bevel gear 5-5 and the front driven bevel gear 5-6 are positioned in the front steering box body 5-2 and meshed with each other; the lower end of the front transmission shaft 5-3 is coaxially connected with the front drive bevel gear 5-5; the front drive bevel gear 5-5 is coaxially connected with the middle part of the front output shaft 5-4; two front wheels 10 are respectively arranged at two ends of the front output shaft 5-4 (namely, the output end of the front traveling box 5) extending out of the front steering box body 5-2.

Referring to fig. 3-4, the upper end of the front transmission shaft 5-3 is connected with the output end of the same-speed differential speed gearbox 8 through a first bevel gear assembly 14. The first bevel gear assembly 14 includes two intermeshing third bevel gears (in this embodiment two diameters of different sizes to achieve a variable speed drive). The two third bevel gears are respectively and coaxially connected with the upper end of the front transmission shaft 5-3 and the output end of the same-speed and different-speed gearbox 8. So that the differential speed gearbox 8 can drive the front transmission shaft 5-3 to vertically rotate.

Wherein the steering shaft 12-1 of the armrest frame 12 is rotatably installed on the main box body 3-1 of the main gearbox 3 or the frame 1; the steering shaft 12-1 is also connected with the front steering box 5-2 through a linkage mechanism 13 and can rotate the front steering box 5-2 in a linkage manner when the armrest frame 12 rotates.

In particular, referring to fig. 2 and 11-12, the linkage 13 includes a first transverse link 13-1, a first longitudinal link 13-2, a second vertical link 13-3, a second longitudinal link 13-4, a second transverse link 13-5, a steering rod 13-6, and a direction tooth 13-7; one end of the first transverse connecting rod 13-1 is fixedly connected with the steering shaft 12-1; the other end of the first transverse connecting rod 13-1 is hinged with one end of the first longitudinal connecting rod 13-2; the other end of the first longitudinal connecting rod 13-2 is hinged with the upper end of the second vertical connecting rod 13-3; the middle part of the second vertical connecting rod 13-3 is hinged with the frame 1; the lower end of the second vertical connecting rod 13-3 is hinged with one end of the second longitudinal connecting rod 13-4; the other end of the second longitudinal connecting rod 13-4 is hinged with one end of the second transverse connecting rod 13-5; the other end of the second transverse connecting rod 13-5 is fixedly connected with the upper end of the steering rod 13-6; the steering rod 13-6 is rotatably arranged on the front fixed box body 5-1; the direction teeth 13-7 are positioned in the front fixed box body 5-1 and are coaxially fixed with the steering rod 13-6; steering teeth 13-8 are arranged on the outer wall of the barrel part of the front steering box body 5-2; the steering teeth 13-8 intermesh with the direction teeth 13-7. When in operation, the armrest frame 12 swings to enable the steering shaft 12-1 to rotate on the main box body 3-1 (or the frame 1) of the main gearbox 3, the steering shaft 12-1 sequentially passes through the first transverse connecting rod 13-1, the first longitudinal connecting rod 13-2, the second vertical connecting rod 13-3, the second longitudinal connecting rod 13-4 and the connecting rod combined motion formed by the second transverse connecting rod 13-5 to finally drive the steering rod 13-6 to rotate in the front fixed box body 5-1, the direction teeth 13-7 on the steering rod 13-6 are meshed with the steering teeth 13-8 on the front steering box body 5-2 for transmission, the front steering box body 5-2 can be equivalent to the rotation of the front fixed box body 5-1, the left and right directions of the front steering box body 5-2 are changed, the front wheel 10 on the front steering box body 5-2 or the front steering box body 5-2 swings along with the front steering box body to control the running and working direction, and the front direction of a user can be controlled in a rear direction, and the operation is safer and more convenient.

Referring to fig. 3 to 4, the rear traveling case 4 preferably includes a rear case body 4-1, a rear drive shaft 4-2, a rear output shaft 4-3, a rear drive bevel gear 4-4, and a rear driven bevel gear 4-5; the rear transmission shaft 4-2 is vertically and rotatably arranged in the rear box body 4-1; the rear output shaft 4-3 is horizontally and rotatably arranged on the rear box body 4-1; the rear driving bevel gear 4-4 and the rear driven bevel gear 4-5 are positioned in the rear box body 4-1 and meshed with each other; the lower end of the rear transmission shaft 4-2 is coaxially connected with the rear drive bevel gear 4-4; the rear driven bevel gear 4-5 is coaxially connected with the rear output shaft 4-3; two rear wheels 9 (or cutters 11) are respectively arranged at two ends of the rear output shaft 4-3 (namely, the output end of the rear traveling case 4) extending out of the rear case 4-1.

Referring to fig. 3-4, the first output of the main gearbox 3 is connected to the upper end of the rear drive shaft 4-2 by a second bevel gear member 15. The second bevel gear unit 15 comprises two intermeshing fourth bevel gears (in this embodiment two diameters of different sizes to achieve a variable speed transmission). The fourth bevel gear is coaxially connected with the upper end of the rear transmission shaft 4-2 and the first output end of the main gearbox 3 respectively. The main gearbox 3 can thus drive the rear drive shaft 4-2 to rotate vertically.

When in use, the rear wheel 9 is arranged at the output end of the rear walking box 4; the output end of the front traveling box 5 is provided with a front wheel 10 or a cutter 11.

The utility model can realize the following two working modes:

As a first mode of operation (tilling mode): firstly, installing a cutter 11 on the output end of the rear traveling box 4, and switching the same-speed and different-speed gearbox 8 to a different-speed working gear, wherein the transmission ratio of the same-speed and different-speed gearbox 8 is larger than 1 at the moment to reduce the speed and output; then, the power source 2 is started to work simultaneously with the rear traveling case 4 and the front traveling case 5 through the main transmission case drive 3, and the same-speed transmission case 8 is switched to a different-speed working gear (the transmission ratio is larger than 1), so that the cutter 11 on the rear traveling case 4 and the front wheel 10 of the front traveling case 5 become differential motion, the front wheel 10 of the rear traveling case 4 is output in a decelerating manner, and therefore the front wheel 10 rotates at a lower speed to work as traveling, and the cutter 11 rotates at a higher speed to work as tilling (or weeding, etc.).

As a second mode of operation (four-wheel drive mode of transportation): firstly, a rear wheel 9 is arranged at the output end of the rear traveling box 4, the same-speed and different-speed gearbox 8 is switched to a same-speed working gear, and at the moment, the transmission ratio of the same-speed and different-speed gearbox 8 is equal to 1 and the same-speed and different-speed gearbox 8 outputs at a constant speed; then restarting the work, the power source 2 drives the rear traveling case 4 and the front traveling case 5 to work simultaneously through the main gearbox 3, and the same-speed gearbox 8 is switched to the same-speed working gear (the transmission ratio is equal to 1), so that the rear wheel 9 on the rear traveling case 4 and the front wheel 10 of the front traveling case 5 move at the same speed, the front wheel 10 and the rear wheel 9 rotate at the same speed and work simultaneously, the full-time four-wheel-drive work can be realized, the full-time four-wheel-drive power transmission can be suitable for the use condition under the transportation (loaded) state, the carrying capacity can be improved, and the full-time four-wheel-drive power transmission can be more suitable for more complex road conditions.

The two modes of operation can be realized, so that the problems that the prior art cannot be used for transportation and farmland or weeding and the like, and the application range is small and the function is single can be solved.

And in particular, referring to fig. 13, when the main gear box 3 is input from the power source 2 when the vehicle is used, the output is carried out in two directions through the second input shaft 3-2 of the main gear box 3, and the first is directly transmitted to the rear traveling box 4 as in a common mini-tiller (namely, the existing mini-tiller); then output to the rear wheels 9 on both sides; and the second is that the main gearbox 3 is sequentially transmitted to the front wheels 10 on two sides of the front traveling box 5 after passing through the clutch 6, the universal joint 7 and the same-speed gearbox 8 (being switched to the same-speed working gear), and at the moment, the output speed ratios of the rear traveling box 4 and the front traveling box 5 are the same, so that the four-wheel-drive transmission is suitable for being used as a four-wheel-drive transport means. Referring to fig. 13, the hopper 16 may be first installed on the frame 1 prior to transportation.

Referring to fig. 14, when the micro-cultivator is used, the two rear wheels 9 are replaced by special cutters 11, such as a cultivating cutter (or a weeding cutter, etc. according to actual needs), and then the same-speed gearbox 8 is switched to a different-speed working gear, so that a lower rotating speed and low-speed walking can be obtained by two-stage speed reduction (the transmission ratio is greater than 1) of the same-speed gearbox 8 and then the two front wheels 10 on two sides of the front walking box 5, and at the moment, the rotating speed of the cutters 11 (such as the cultivating cutter, etc.) is greater than the rotating speed of the front wheels 10, so that the micro-cultivator is suitable for driving the cultivating cutter (or other cutters such as the weeding cutter, etc.) to carry out rotary cultivation operation so as to achieve the purpose of cultivating lands.

When the vehicle needs to turn, the armrest frame 12 can be controlled in direction, and when the armrest frame 12 is operated to rotate the steering shaft 12-1, the front steering box body 5-2 is linked to rotate through the linkage mechanism 13 to change the direction of the front wheels 10, so that the control of the left and right forward directions of the two front wheels 10 on the front traveling box 5 in the rear direction is realized, and meanwhile, the front traveling box 5 rotates by rotating the centers of the two front wheels, so that the aim of differential-speed-free steering control is fulfilled.

Therefore, the utility model can realize dual-purpose of carrying and tilling, can fully retain the functions of the original mini-tiller, and simultaneously increase the transport functions which the original mini-tiller does not have, greatly increase the action and the utilization rate of the machine and reduce the use cost and the labor force of users.

The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims (10)

1. The four-wheel-drive multifunctional mini-tiller comprises a rack (1), a power source (2), a main gearbox (3), a rear traveling box (4), a front traveling box (5) and an armrest frame (12), wherein the power source (2) is connected with the input end of the main gearbox (3); the method is characterized in that: the clutch (6), the universal joint (7) and the same-speed and different-speed gearbox (8) are also included;

The first output end of the main gearbox (3) is connected with the input end of the rear traveling box (4); the second output end of the main gearbox (3) is connected with the input end of the clutch (6);

The output end of the clutch (6) is connected with the input end of the same-speed and different-speed gearbox (8) through a universal joint (7); the output end of the same-speed and different-speed gearbox (8) is connected with the input end of the front traveling box (5);

The same-speed and different-speed gear box (8) is provided with a same-speed working gear and a different-speed working gear, the transmission ratio of the same-speed working gear is 1 when the same-speed working gear is switched, and the transmission ratio of the same-speed working gear is larger than 1 when the same-speed working gear is switched;

A rear wheel (9) or a cutter (11) is arranged at the output end of the rear walking box (4); the front wheel (10) is arranged at the output end of the front walking box (5).

2. The four-wheel drive multifunctional mini-tiller as claimed in claim 1, wherein: the speed changing box (8) comprises a first box body (8-1), a first input shaft (8-2), a first output shaft (8-3) and an intermediate shaft (8-4);

The first input shaft (8-2) is provided with a first driving tooth (8-21); an inner gear ring (8-31) and first driven teeth (8-32) are arranged on the first output shaft (8-3); the intermediate shaft (8-4) has input teeth (8-41) and output teeth (8-42);

In the same-speed working gear, the first driving teeth (8-21) are simultaneously meshed with the input teeth (8-41) and the inner gear ring (8-31)) and the first driven teeth (8-32) are disengaged from the output teeth (8-42);

The first driving teeth (8-21) are disengaged from the inner gear ring (8-31) in the different-speed working gear; the first driving teeth (8-21) intermesh with the input teeth (8-41) and the first driven teeth (8-32) intermesh with the output teeth (8-42).

3. The four-wheel drive multifunctional mini-tiller as claimed in claim 1, wherein: the power source (2) adopts a motor or an engine.

4. The four-wheel drive multifunctional mini-tiller as claimed in claim 1, wherein: the main gearbox (3) is located above the rear travelling box (4).

5. The four-wheel drive multifunctional mini-tiller as claimed in claim 1, wherein: the front walking box (5) comprises a front fixed box body (5-1), a front steering box body (5-2), a front transmission shaft (5-3), a front output shaft (5-4), a front driving bevel gear (5-5) and a front driven bevel gear (5-6); the steering box body (5-2) is in rotatable fit with the fixed box body (5-1); the front transmission shaft (5-3) is vertically and rotatably arranged in the steering box body (5-2); the front output shaft (5-4) is horizontally and rotatably arranged on the steering box body (5-2); the front driving bevel gear (5-5) and the front driven bevel gear (5-6) are positioned in the front steering box body (5-2) and meshed with each other; the lower end of the front transmission shaft (5-3) is coaxially connected with the front drive bevel gear (5-5); the front drive bevel gear (5-5) is coaxially connected with the front output shaft (5-4); the front wheel (10) is mounted on the front output shaft (5-4).

6. The four-wheel drive multifunctional mini-tiller according to claim 5, wherein: the upper end of the front transmission shaft (5-3) is connected with the output end of the same-speed and different-speed gearbox (8) through a first bevel gear assembly (14).

7. A four-wheel drive multifunctional mini-tiller according to claim 5 or 6, characterized in that: the steering shaft (12-1) of the armrest frame (12) is rotatably arranged on the main gearbox (3) or the frame (1); the steering shaft (12-1) is also connected with the front steering box body (5-2) through a linkage mechanism (13) and can enable the front steering box body (5-2) to rotate in a linkage way when the armrest frame (12) rotates.

8. The four-wheel drive multifunctional mini-tiller according to claim 7, wherein: the linkage mechanism (13) comprises a first transverse connecting rod (13-1), a first longitudinal connecting rod (13-2), a second vertical connecting rod (13-3), a second longitudinal connecting rod (13-4), a second transverse connecting rod (13-5), a steering rod (13-6) and a direction tooth (13-7);

One end of the first transverse connecting rod (13-1) is fixedly connected with the steering shaft (12-1); the other end of the first transverse connecting rod (13-1) is hinged with one end of the first longitudinal connecting rod (13-2); the other end of the first longitudinal connecting rod (13-2) is hinged with the upper end of the second vertical connecting rod (13-3); the middle part of the second vertical connecting rod (13-3) is hinged with the frame (1); the lower end of the second vertical connecting rod (13-3) is hinged with one end of the second longitudinal connecting rod (13-4); the other end of the second longitudinal connecting rod (13-4) is hinged with one end of the second transverse connecting rod (13-5); the other end of the second transverse connecting rod (13-5) is fixedly connected with the upper end of the steering rod (13-6); the steering rod (13-6) is rotatably arranged on the front fixed box body (5-1); the direction teeth (13-7) are positioned in the front fixed box body (5-1) and are coaxially fixed with the steering rod (13-6); steering teeth (13-8) are fixedly arranged on the front steering box body (5-2); the steering teeth (13-8) are engaged with the direction teeth (13-7).

9. The four-wheel drive multifunctional mini-tiller as claimed in claim 1, wherein: the rear walking box (4) comprises a rear box body (4-1), a rear transmission shaft (4-2), a rear output shaft (4-3), a rear driving bevel gear (4-4) and a rear driven bevel gear (4-5); the rear transmission shaft (4-2) is vertically and rotatably arranged in the rear box body (4-1); the rear output shaft (4-3) is horizontally and rotatably arranged on the rear box body (4-1); the rear driving bevel gear (4-4) and the rear driven bevel gear (4-5) are positioned in the rear box body (4-1) and meshed with each other; the lower end of the rear transmission shaft (4-2) is coaxially connected with the rear drive bevel gear (4-4); the rear driven bevel gear (4-5) is coaxially connected with the rear output shaft (4-3); the rear wheel (9) or the cutter (11) is mounted on the rear output shaft (4-3).

10. The four-wheel drive multifunctional mini-tiller as in claim 9, further comprising: the first output end of the main gearbox (3) is connected with the upper end of the rear transmission shaft (4-2) through a second bevel gear assembly (15).