CN214228791U - Gear box structure of mini-tiller - Google Patents

Abstract

The utility model relates to a gearbox body structure of a mini-tiller, which comprises a gearbox, wherein the gearbox comprises an upper box body, a middle box body and a lower box body which are connected in a segmented and detachable way in sequence; the upper box body is provided with a power input opening so as to be connected with a power source; the upper box body is also provided with a middle box body connecting opening, and the upper box body is buckled with the upper box body connecting opening on the middle box body through the middle box body connecting opening and is connected with the middle box body; the whole V-arrangement that is invert of well box, go up box connection trompil and be located its upper portion, two free ends of its lower part form respectively and walk output end and cutter transmission end, and the free end of cutter transmission end still has lower box connection trompil, and well box is connected the trompil lock and is connected lower box through last connection on lower box connection trompil and the lower box. This structure is divided into the triplex with the gearbox, does benefit to on the one hand and reduces the volume, reduces the die sinking expense, and on the other hand, but the part assembly is carried out to upper, middle, lower box respectively to the station during assembly, then the butt joint equipment, effectively improves assembly efficiency.

Description

Gear box structure of mini-tiller

Technical Field

The utility model belongs to the technical field of the transmission of machine is ploughed a little in mechanical engineering, concretely relates to machine gearbox structure is ploughed a little.

Background

The mini-tiller is a mechanized agricultural cultivator which drives the cultivator to rotate to perform operations such as soil turning and the like by a small gasoline engine or a diesel engine, and is more and more widely accepted for use because the mini-tiller has the advantages of light weight, small volume, simple structure and the like, and can solve the problem that large agricultural machinery cannot be applied in some scenes. The mini-tiller mainly comprises a frame, an engine arranged on the frame, and the engine outputs a traveling system connected with a traveling wheel and a tilling tool system with a tilling blade through a transmission device.

In the initially developed mini-tiller structure, gears arranged in a transmission device are mainly single-stage transmission, the transmission of power transmission is small, and the output rotating speed lacks a changeable space; the problem that different soil qualities can be matched with different traveling speed requirements to achieve better cultivation efficiency cannot be solved; the initial mini-tiller has the defects of insufficient power and difficulty in meeting the requirements of people for efficient use in different environments.

In order to solve the above problems, technicians have designed various transmission types of structures for mini-tillers, such as the structure disclosed in CN 202441827U, CN 203130942U, CN 211288625U, etc., but some problems still remain in use, mainly including: 1. the volume of a gearbox of the transmission speed change part is still larger, and the oil quantity injected into the gearbox is large; 2. the engine is connected with the clutch, the output of the clutch is usually connected with the speed change mechanism through the belt, the transmission loss is large, the belt is exposed, the muddy water is easy to seep and then slip, and the service life of the whole machine is influenced; 3. the low-speed gear and the high-speed gear of the walking system are high in speed and are not matched with the rotation of the tillage knife, the soil turning effect is affected, and the advancing load is larger; 4. the gearbox is of an integrated structure, the size is large, the cost of die sinking manufacturing is high, only single-station operation can be performed during assembly, and the assembly efficiency is low.

SUMMERY OF THE UTILITY MODEL

The above-mentioned not enough to prior art, the to-be-solved technical problem of the utility model is to provide a machine gearbox body structure is ploughed a little of new design gains and optimizes gearbox and internal transmission structure, reduces the gearbox volume, reduces the effect of oiling volume.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the mini-tiller gearbox body structure comprises a gearbox, wherein the gearbox comprises an upper gearbox body, a middle gearbox body and a lower gearbox body which are connected in a segmented and detachable mode in sequence; the upper box body is provided with a power input opening so as to be connected with a power source; the upper box body is also provided with a middle box body connecting opening, and the upper box body is buckled with the upper box body connecting opening on the middle box body through the middle box body connecting opening and is connected with the middle box body; the whole V-arrangement that is invert of well box, go up box connection trompil and be located its upper portion, two free ends of its lower part form respectively and walk output end and cutter transmission end, and the free end of cutter transmission end still has lower box connection trompil, and well box is connected the trompil lock and is connected lower box through last connection on lower box connection trompil and the lower box.

The technical scheme is further perfected, a second shaft is rotatably connected in the gearbox so as to be used as power input, the second shaft is in transmission connection with a walking gear shifting mechanism and a cutter gear shifting mechanism which are installed in the gearbox, a second shaft pinion is synchronously and rotatably arranged on the second shaft, the second shaft is meshed with a three-shaft large gear which is synchronously and rotatably arranged on the third shaft through the second shaft pinion so as to be in transmission connection with the third shaft, a three-shaft duplicate gear is also synchronously and rotatably arranged on the third shaft, and the three-shaft duplicate gear can slide along the axial direction of the third shaft; the walking gear shifting mechanism comprises a three-shaft duplex gear, four shafts, five shafts and a walking shaft, wherein the three-shaft duplex gear consists of a three-shaft duplex pinion and a three-shaft duplex big gear, the four shafts are synchronously rotated and provided with a four-shaft big gear and a four-shaft pinion which are respectively matched with the three-shaft duplex pinion and the three-shaft duplex big gear so as to respectively realize neutral gear, high gear and low gear when the three-shaft duplex gear slides along the axial direction of three shafts correspondingly, the four shafts are also synchronously rotated and provided with four-shaft transmission pinions, the four shafts are meshed with a five-shaft big gear synchronously rotated and provided on the five shafts through the four-shaft transmission pinions so as to be in transmission connection with the five shafts, the five shafts are also synchronously rotated and provided with five-shaft sprockets and are connected with the walking shaft through a five-shaft sprocket and a chain, the five-shaft duplex gear can also, the other gear of the five-shaft duplicate gear is matched with the three-shaft duplicate gear so as to correspondingly realize reverse gear when the three-shaft duplicate gear slides along the axial direction of the three shafts; the cutter gear shifting mechanism comprises a three-shaft gear wheel, eight transmission gears which are arranged on the three shaft gear wheel and eight shafts in a synchronous rotating mode are meshed with each other to connect eight shafts in a transmission mode, eight shafts are further synchronously rotated to be provided with eight gear shifting gears and can slide along the axial direction of the eight shafts, the eight shafts are meshed with seven gears which are arranged on seven shafts in a synchronous rotating mode to be meshed with each other to be connected with seven shafts in a transmission mode when the eight shafts slide along the axial direction of the eight shafts, and the seven shafts are connected with a cutter shaft in a transmission mode.

Furthermore, the four-axis large gear and the four-axis small gear are arranged adjacently in the axial direction, and the axial length of the three-axis duplicate gear is smaller than the axial distance between the four-axis large gear and the four-axis small gear; in the axial direction, the three-shaft duplex pinion and the four-shaft gearwheel correspond to the same end, the three-shaft duplex gearwheel and the four-shaft pinion correspond to the same end, the five-shaft duplex gearwheel consists of a five-shaft duplex pinion and a five-shaft duplex gearwheel, the five-shaft duplex pinion is meshed with the four-shaft pinion, and the five-shaft duplex gearwheel is positioned at one end of the four-shaft pinion, which is far away from the four-shaft gearwheel.

Further, a four-axis transfer pinion is located on an end of the four-axis bull gear facing away from the four-axis pinion, and a five-axis sprocket is located on the five axis and corresponds to a position between the four-axis bull gear and the four-axis pinion.

Further, an eight-shaft transmission gear is arranged on the eight shaft and corresponds to the position between the four-shaft bull gear and the four-shaft transmission pinion; the eight-shaft shift gear is located at an end of the eight-shaft transfer gear that faces away from the four-shaft transfer pinion.

Furthermore, the seven shafts are meshed with nine shafts of gears which are synchronously and rotatably arranged on the nine shafts through seven shafts of gears to be in transmission connection with the nine shafts, the nine shafts are meshed with ten shafts of gears which are synchronously and rotatably arranged on the ten shafts through nine shafts of gears to be in transmission connection with the ten shafts, and the ten shafts are also synchronously and rotatably provided with ten shaft chain wheels and are in transmission connection with the cutter shaft through ten shaft chain wheels and chains.

Furthermore, the upper box body is provided with a two-shaft through hole, a three-shaft through hole, a four-shaft through hole, a five-shaft through hole and an eight-shaft through hole, and is correspondingly and rotatably installed and connected with the two shafts, the three shafts, the four shafts, the five shafts and the eight shafts; the traveling output end of the middle box body is provided with a traveling shaft through hole and is correspondingly and rotatably installed and connected with a traveling shaft, and the cutter transmission end is provided with seven shaft through holes, nine shaft through holes and ten shaft through holes and is correspondingly and rotatably installed and connected with seven shafts, nine shafts and ten shafts; the lower box body is provided with a cutter shaft through hole and is correspondingly and rotatably installed with a connecting cutter shaft.

Furthermore, the middle box body is connected with the opening of the upper box body and is provided with a circle of convex edges around the opening, and the two convex edges are connected in a bolted mode to realize detachable connection between the upper box body and the middle box body.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a plough quick-witted gearbox body structure a little combines gear drive's structural design, is the gearbox segmentation triplex, does benefit to on the one hand and reduces the volume, reduces die sinking manufacturing cost, and on the other hand, when the assembly, but the assembly of parts is carried out to each axle, the gear of last box, well box, lower box inside respectively to three station, docks the equipment again after accomplishing the assembly of parts, effectively improves assembly efficiency.

2. The gear transmission part of the gearbox body structure of the mini-tiller is designed compactly, so that the size of the gearbox is greatly reduced; the two-section chain transmission of the traditional cutter part is improved into a one-section continuous gear transmission and one-section chain transmission mode, and the continuous gear transmission has better structural strength and higher reliability compared with the chain transmission; particularly, the continuous gear transmission structure is compact, the size of the corresponding gearbox part can be smaller, the inner wall of the corresponding gearbox part can be better fitted, the inner space is reduced, the oil quantity required to be injected is correspondingly reduced, and the use cost is reduced.

3. The walking gear shifting mechanism and the cutter gear shifting mechanism in the utility model are respectively connected and input through the three-shaft duplicate gear and the three-shaft big gear, are relatively independent systems and are convenient to control; the novel gear transmission of the walking gear shifting mechanism is designed, a proper transmission ratio is combined, a better transmission process and effect are achieved, the gear transmission is matched with the output rotating speed of the cutter, the walking speed and the cutter rotating speed are good in adaptability during use, and the output transmission efficiency of an engine can be effectively guaranteed.

Drawings

FIG. 1 is a schematic structural view of a transmission speed change structure of a micro-cultivator in a specific embodiment;

FIG. 2 is a schematic view of a gearbox gear drive portion of the mini-tiller transmission shifting structure of FIG. 1;

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

FIG. 4 is a schematic disassembled view of a transmission case in the transmission shifting structure of the micro-cultivator in FIG. 1;

FIG. 5 is a schematic view of a travel speed change transmission portion of the transmission speed change structure of the micro-farming machine of FIG. 1;

FIG. 6 is a schematic diagram of a tool shift transmission portion of the transmission shift structure of the mini-tiller of FIG. 1;

FIG. 7 is a schematic diagram of an independent structure of an upper case in an embodiment;

FIG. 8 is a schematic diagram of an independent structure of a middle box in an embodiment;

FIG. 9 is a schematic diagram of an independent structure of a lower case in an embodiment;

wherein, the gear box 1, the upper box body 15, the power input opening 151, the two-axis through hole 152, the three-axis through hole 153, the four-axis through hole 154, the five-axis through hole 155, the eight-axis through hole 156, the walking shift shaft hole 157, the cutter shift shaft hole 158, the middle box body connecting opening 159, the walking shift shaft 18, the cutter shift shaft 19,

a middle box body 16, an upper box body connecting opening 161, a walking output end 162, a cutter transmission end 163, a walking shaft through hole 164, a seven shaft through hole 165, a nine shaft through hole 166, a ten shaft through hole 167, a lower box body connecting opening 168,

the lower case 17, an upper connecting opening 171, a cutter shaft through hole 172,

the engine 12, the clutch 13, the clutch arm 131, the output shaft 14, the bevel pinion 141,

a biaxial 2, a large bevel gear 21, a biaxial pinion gear 22,

three shafts 3, three shaft bull gears 31, three shaft duplicate gears 32, three shaft duplicate pinions 321, three shaft duplicate bull gears 322,

four shafts 4, four shaft pinions 41, four shaft bull gears 42, four shaft transfer pinions 43,

five shafts 5, five shafts big gears 51, five shafts chain wheels 52, five shafts duplex gears 53, five shafts duplex pinion gears 531, five shafts duplex big gears 532,

the traveling shaft 6, the traveling sprocket 61,

eight shafts 8, eight shaft transfer gears 81, eight shaft shift gears 82,

the seven shafts 7, the seven shaft gears 71,

the nine shafts 9, the nine shaft gears 91,

ten-shaft 10, ten-shaft gear 101, ten-shaft sprocket 102,

a cutter shaft 11 and a cutter chain wheel 111.

Detailed Description

The following describes the present invention in further detail with reference to the accompanying drawings.

For understanding the utility model discloses a plough quick-witted gearbox structure's utility a little, combine to use the holistic machine transmission variable speed structure of ploughing a little of this gearbox structure to carry out concrete introduction.

Referring to fig. 1 to 6, the transmission speed change structure of the mini-tiller according to the embodiment includes an engine 12, the engine 12 is connected to a walking shift mechanism and a cutter shift mechanism through an output of a clutch 13, an output shaft 14 of the clutch 13 is connected to a secondary shaft 2 through a gear transmission, a secondary pinion 22 is arranged on the secondary shaft 2 in a synchronous rotating manner, the secondary shaft 2 is engaged with a three-shaft gearwheel 31 arranged on a three-shaft 3 in a synchronous rotating manner through the secondary pinion 22 to be in a transmission connection with the three-shaft 3, a three-shaft duplicate gear 32 is further arranged on the three-shaft 3 in a synchronous rotating manner, and the three-shaft duplicate gear 32 can slide along an axial direction of the three-shaft 3.

The walking gear shifting mechanism comprises the three-shaft duplicate gear 32, a four-shaft 4, a five-shaft 5 and a walking shaft 6, the three-shaft duplicate gear 32 is composed of a three-shaft duplicate pinion 321 and a three-shaft duplicate gear 322, the four-shaft 4 is synchronously and rotatably provided with a four-shaft gear wheel 42 and a four-shaft pinion 41 which are respectively matched with the three-shaft duplicate pinion 321 and the three-shaft duplicate gear 322 so as to respectively realize neutral, high-speed and low-speed gears when the three-shaft duplicate gear 32 slides along the axial direction of the three shafts 3, the four-shaft 4 is also synchronously and rotatably provided with a four-shaft transmission pinion 43, the four-shaft 4 is meshed with a five-shaft gear wheel 51 which is synchronously and rotatably provided on the five shafts 5 through the four-shaft transmission pinion 43 so as to be in transmission connection with the five shafts 5, the five-shaft 5 is also synchronously and rotatably provided with a five-shaft chain wheel 52 and is connected with the walking shaft 6 through the five-shaft chain wheel 52 and a chain transmission, in particular, the walking shaft 6 is synchronously and rotatably provided with a walking chain wheel 61, the five-shaft chain wheel 52 is connected with a walking chain wheel 61 through chain transmission; five shafts 5 can also be rotatably sleeved with five shaft duplicate gears 53, one of the five shaft duplicate gears 53 is meshed with the four shaft small gear 41 or the four shaft big gear 42, and the other of the five shaft duplicate gears 53 is matched with the three shaft duplicate gear 32, so that reverse gear can be correspondingly realized when the three shaft duplicate gear 32 slides along the axial direction of the three shafts 3.

The cutter gear shifting mechanism comprises a three-shaft gear wheel 31, eight transmission gears 81 arranged on the three shaft 3 and eight shafts 8 in a synchronous rotation mode are meshed with each other to be connected with eight shafts 8 in a transmission mode through the three-shaft gear wheel 31, eight shafts 8 are further arranged on the eight shafts 8 in a synchronous rotation mode and are provided with eight gear shifting gears 82, the eight gear shifting gears 82 can slide along the axial direction of the eight shafts 8 so as to respectively correspond to realize neutral positions and gear engaging modes, the eight shafts 8 are meshed with seven gears arranged on seven shafts 7 in a synchronous rotation mode to be engaged with each other to be connected with seven shafts 7 in a transmission mode when sliding along the axial direction through the eight gear shifting gears 82, and the seven shafts 7 are in transmission connection with a cutter shaft 11.

The transmission speed change structure of the embodiment, the walking gear shift mechanism and the cutter gear shift mechanism are respectively connected and input through the three-shaft duplicate gear 32 and the three-shaft big gear 31, and are relatively independent systems and convenient to control.

The gear transmission of the walking gear shifting mechanism is newly designed, a proper transmission ratio is combined, a better transmission process and effect are achieved, the gear transmission is matched with the output rotating speed of the cutter, the walking speed and the cutter rotating speed are good in adaptability during use, and the output transmission efficiency of the engine 12 can be effectively guaranteed.

Wherein, the output shaft 14 of the clutch 13 is provided with a small bevel gear 141 in synchronous rotation, and the output shaft 14 of the clutch 13 is meshed with a large bevel gear 21 arranged in synchronous rotation on the secondary shaft 2 through the small bevel gear 141 to be connected with the secondary shaft 2 in a transmission way.

Like this, the output shaft 14 of clutch 13 directly links the output to biax 2 through the gear, avoids the output loss that traditional belt feeder exists, does not use the belt nor does not have and exposes, and the output shaft 14 and the bevel pinion 141 of clutch 13 all can stretch into gearbox 1, and the leakproofness is good, avoids the infiltration, increase of service life.

The four-axis bull gear 42 and the four-axis pinion 41 are axially arranged adjacently, and the axial length of the three-axis duplicate gear 32 is smaller than the axial distance between the four-axis bull gear 42 and the four-axis pinion 41; in the axial direction, the three-axis duplex pinion 321 and the four-axis bull gear 42 correspond to the same end, the three-axis duplex pinion 322 and the four-axis pinion 41 correspond to the same end, the three-axis duplex gear 32 slides in the axial direction of the three axes 3, the low-speed gear is correspondingly adopted when the three-axis duplex pinion 321 is meshed with the four-axis bull gear 42, the three-axis duplex gear 32 slides in the axial direction of the three axes 3, the high-speed gear is correspondingly adopted when the three-axis duplex pinion 322 is meshed with the four-axis pinion 41, the five-axis duplex gear 53 is composed of a five-axis duplex pinion 531 and a five-axis duplex bull gear 532, the five-axis duplex pinion 531 is meshed with the four-axis pinion 41, and the five-axis duplex bull gear 532 is located at one end of the four-axis pinion 41 away from the four-axis bull gear 42, so that the three-axis duplex pinion 322 is meshed with the five-axis duplex bull gear 532 and correspondingly serves as a reverse gear when the three-axis duplex gear 32 slides in the axial direction of the three axes 3; the three-shaft duplicate gear 32 slides along the axial direction of the three shafts 3, and the neutral gear is corresponding to the three-shaft 3 duplicate big gear when the three-shaft 3 duplicate big gear is positioned between the four-shaft small gear 41 and the five-shaft duplicate big gear 532.

Wherein the four-axis transfer pinion 43 is located at an end of the four-axis bull gear 42 facing away from the four-axis pinion 41, and the five-axis sprocket 52 is located on the five axis 5 and corresponds between the four-axis bull gear 42 and the four-axis pinion 41.

Among them, the eight-shaft transmission gear 81 is on the eight shaft 8 and corresponds to the position between the four-shaft bull gear 42 and the four-shaft transmission pinion gear 43; the eight-shaft shift gear 82 is located at an end of the eight-shaft transmission gear 81 facing away from the four-shaft transmission pinion 43.

Therefore, the realizability of transmission is ensured, the structure is compact, and the reduction of the volume of the gearbox 1 is facilitated.

The seven shafts 7 are meshed with nine shafts 91 which are arranged on the nine shafts 9 in a synchronous rotating mode through seven shafts, so that the nine shafts 9 are connected in a transmission mode, the nine shafts 9 are meshed with ten shafts 101 which are arranged on the ten shafts 10 in a synchronous rotating mode through the nine shafts 91, so that the ten shafts 10 are connected in a transmission mode, ten shaft chain wheels 102 are further arranged on the ten shafts 10 in a synchronous rotating mode, the tool shafts 11 are connected with the tool shafts 11 through the ten shaft chain wheels 102 and a chain transmission mode, specifically, tool chain wheels 111 are arranged on the tool shafts 11 in a synchronous rotating mode, and the ten shaft chain wheels 102 are connected with the tool chain wheels 111 through the chain transmission mode.

Therefore, the traditional two-segment chain transmission is improved into a one-segment continuous gear transmission and one-segment chain transmission mode, and the continuous gear transmission has better structural strength and higher reliability compared with the chain transmission; particularly, the continuous gear transmission structure is compact, the size of the corresponding part of the gearbox 1 can be smaller, the inner wall of the corresponding part of the gearbox 1 can be better attached, the inner space is reduced, the oil quantity required to be injected is correspondingly reduced, and the use cost is reduced.

The three-shaft duplicate gear 32 is correspondingly connected to the three shafts 3 through splines so as to realize synchronous rotation and axial sliding; the eight-shaft shift gear 82 is correspondingly splined to the eight shafts 8 for synchronous rotation and axial sliding. The synchronous rotary connection of other gears and chain wheels with corresponding shafts can also be selected to be connected by a spline or a flat key.

Referring to fig. 7-8, the traveling gear shifting mechanism and the cutter gear shifting mechanism are both disposed in the transmission case 1, and the transmission case 1 includes an upper case 15, a middle case 16 and a lower case 17, which are detachably connected in sequence in a segmented manner.

The upper box body 15 is provided with a power input opening 151, the output shaft 14 of the clutch 13 extends into the power input opening 151, the upper box body 15 is further provided with a two-shaft through hole 152, a three-shaft through hole 153, a four-shaft through hole 154, a five-shaft through hole 155 and an eight-shaft through hole 156, the two-shaft through hole, the three-shaft through hole, the four-shaft through hole 155 and the eight-shaft through hole 156 are correspondingly and rotatably installed and connected with a two-shaft 2, a three-shaft 3, a four-shaft 4, a five-shaft 5 and an eight-shaft 8, the upper box body 15 is further provided with a walking shift shaft hole 157 and a cutter shift shaft hole 158, the walking shift shaft 18 and the cutter shift shaft 19 are correspondingly and slidably installed and connected, the walking shift shaft 18 is provided with a walking shift fork corresponding to the three-shaft duplicate gear 32, and the cutter shift shaft 19 is provided with a cutter shift fork corresponding to the eight-shaft shift gear 82; the upper case 15 further has a middle case connection opening 159, and the upper case 15 is fastened to the upper case connection opening 161 of the middle case 16 through the middle case connection opening 159 and connected to the middle case 16.

The middle box body 16 is integrally inverted V-shaped, the upper box body connecting opening 161 is located in the upper portion of the middle box body, two free ends of the lower portion of the middle box body are respectively formed into a walking output end 162 and a cutter transmission end 163, the walking output end 162 is provided with a walking shaft through hole 164 and is correspondingly and rotatably mounted and connected with the walking shaft 6, the cutter transmission end 163 is provided with a seven-shaft through hole 165, a nine-shaft through hole 166 and a ten-shaft through hole 167 and is correspondingly and rotatably mounted and connected with the seven shafts 7, the nine shafts 9 and the ten shafts 10, the free end of the cutter transmission end 163 is further provided with a lower box body connecting opening 168, and the middle box body 16 is buckled with an upper connecting opening 171 on the lower box body 17 through the lower box body connecting opening 168 and is connected with the lower box body 17.

The lower box 17 is provided with a tool shaft through hole 172 and is correspondingly and rotatably mounted with the tool shaft 11.

Like this, combine gear drive's structural design, divide into the triplex with gearbox 1, do benefit to on the one hand and reduce the volume, reduce the die sinking manufacturing cost, on the other hand, when the assembly, can divide three stations to carry out the part assembly respectively to each axle, the gear of upper box 15, well box 16, lower box 17 inside, and butt joint equipment after accomplishing the part assembly effectively improves assembly efficiency.

Referring to fig. 2, as the output shaft 14 of the clutch 13 extends into the upper case 15 from the power input opening 151, in practice, the upper case 15 is further provided with a through hole and rotatably mounted with a clutch arm 131, and the clutch arm 131 is mounted with a clutch cable in the upper case 15 to control the clutch 13 to open and close.

Wherein, a circle of convex edges are arranged around the openings of the middle box body connecting opening 159 and the upper box body connecting opening 161, and the two convex edges are hermetically connected in a bolting mode to realize the detachable connection between the upper box body 15 and the middle box body 16. A circle of convex edges are respectively arranged around the orifices of the lower box body connecting opening 168 and the upper connecting opening 171, and the two convex edges are hermetically connected in a bolting mode to realize the detachable connection between the middle box body 16 and the lower box body 17; a flange is also provided around the opening of the power input opening 151 and is bolted through the flange and sealingly attached to the engine 12 housing to provide a removable connection between the upper case 15 and the engine 12.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (8)

1. Plough quick-witted gearbox structure a little, including the gearbox, its characterized in that: the gearbox comprises an upper box body, a middle box body and a lower box body which are connected in a segmented and detachable mode in sequence;

the upper box body is provided with a power input opening so as to be connected with a power source; the upper box body is also provided with a middle box body connecting opening, and the upper box body is buckled with the upper box body connecting opening on the middle box body through the middle box body connecting opening and is connected with the middle box body;

the whole V-arrangement that is invert of well box, go up box connection trompil and be located its upper portion, two free ends of its lower part form respectively and walk output end and cutter transmission end, and the free end of cutter transmission end still has lower box connection trompil, and well box is connected the trompil lock and is connected lower box through last connection on lower box connection trompil and the lower box.

2. The mini-tiller gearbox body structure as defined in claim 1, wherein: the transmission case is internally and rotatably connected with two shafts to be used as power input, the two shafts are in transmission connection with a walking gear shifting mechanism and a cutter gear shifting mechanism which are arranged in the transmission case, two-shaft pinions are synchronously and rotatably arranged on the two shafts, the two shafts are meshed with three-shaft large gears which are synchronously and rotatably arranged on the three shafts through the two-shaft pinions to be in transmission connection with the three shafts, three-shaft duplicate gears are also synchronously and rotatably arranged on the three shafts, and the three-shaft duplicate gears can slide along the axial direction of the three shafts;

the walking gear shifting mechanism comprises a three-shaft duplex gear, four shafts, five shafts and a walking shaft, wherein the three-shaft duplex gear consists of a three-shaft duplex pinion and a three-shaft duplex big gear, the four shafts are synchronously rotated and provided with a four-shaft big gear and a four-shaft pinion which are respectively matched with the three-shaft duplex pinion and the three-shaft duplex big gear so as to respectively realize neutral gear, high gear and low gear when the three-shaft duplex gear slides along the axial direction of three shafts correspondingly, the four shafts are also synchronously rotated and provided with four-shaft transmission pinions, the four shafts are meshed with a five-shaft big gear synchronously rotated and provided on the five shafts through the four-shaft transmission pinions so as to be in transmission connection with the five shafts, the five shafts are also synchronously rotated and provided with five-shaft sprockets and are connected with the walking shaft through a five-shaft sprocket and a chain, the five-shaft duplex gear can also be rotatably sleeved on the five shafts, one gear in the five-shaft duplex gear is meshed with the four-shaft pinions or the four-shaft big gears, the other gear of the five-shaft duplicate gear is matched with the three-shaft duplicate gear so as to correspondingly realize reverse gear when the three-shaft duplicate gear slides along the axial direction of the three shafts;

the cutter gear shifting mechanism comprises a three-shaft gear wheel, eight transmission gears which are arranged on the three shaft gear wheel and eight shafts in a synchronous rotating mode are meshed with each other to connect eight shafts in a transmission mode, eight shafts are further synchronously rotated to be provided with eight gear shifting gears and can slide along the axial direction of the eight shafts, the eight shafts are meshed with seven gears which are arranged on seven shafts in a synchronous rotating mode to be meshed with each other to be connected with seven shafts in a transmission mode when the eight shafts slide along the axial direction of the eight shafts, and the seven shafts are connected with a cutter shaft in a transmission mode.

3. The mini-tiller gearbox body structure as defined in claim 2, wherein: the four-shaft large gear and the four-shaft small gear are arranged adjacently in the axial direction, and the axial length of the three-shaft duplicate gear is smaller than the axial distance between the four-shaft large gear and the four-shaft small gear; in the axial direction, the three-shaft duplex pinion and the four-shaft gearwheel correspond to the same end, the three-shaft duplex gearwheel and the four-shaft pinion correspond to the same end, the five-shaft duplex gearwheel consists of a five-shaft duplex pinion and a five-shaft duplex gearwheel, the five-shaft duplex pinion is meshed with the four-shaft pinion, and the five-shaft duplex gearwheel is positioned at one end of the four-shaft pinion, which is far away from the four-shaft gearwheel.

4. The mini-tiller gearbox body structure as defined in claim 3, wherein: the four-axis transmission pinion is positioned at one end of the four-axis bull gear, which is far away from the four-axis pinion, and the five-axis chain wheel is positioned on the five axis and corresponds to the position between the four-axis bull gear and the four-axis pinion.

5. The mini-tiller gearbox body structure as defined in claim 4, wherein: the eight-shaft transmission gear is arranged on the eight shafts and corresponds to the position between the four-shaft large gear and the four-shaft small transmission gear; the eight-shaft shift gear is located at an end of the eight-shaft transfer gear that faces away from the four-shaft transfer pinion.

6. The mini-tiller gearbox body structure as defined in claim 5, wherein: the seven shafts are meshed with nine shafts of gears which are synchronously and rotatably arranged on the nine shafts through seven shafts of gears to be in transmission connection with the nine shafts, the nine shafts are meshed with ten shafts of gears which are synchronously and rotatably arranged on the ten shafts through nine shafts of gears to be in transmission connection with the ten shafts, and the ten shafts are also synchronously and rotatably provided with ten shaft chain wheels and are in transmission connection with the cutter shaft through ten shaft chain wheels and chains.

7. The mini-tiller gearbox body structure as defined in claim 6, wherein: the upper box body is provided with a two-shaft through hole, a three-shaft through hole, a four-shaft through hole, a five-shaft through hole and an eight-shaft through hole, and is correspondingly and rotatably installed and connected with the two shafts, the three shafts, the four shafts, the five shafts and the eight shafts;

the traveling output end of the middle box body is provided with a traveling shaft through hole and is correspondingly and rotatably installed and connected with a traveling shaft, and the cutter transmission end is provided with seven shaft through holes, nine shaft through holes and ten shaft through holes and is correspondingly and rotatably installed and connected with seven shafts, nine shafts and ten shafts;

the lower box body is provided with a cutter shaft through hole and is correspondingly and rotatably installed with a connecting cutter shaft.

8. A mini-tiller gearbox housing structure as defined in any one of claims 1-7, wherein: the middle box body is connected with the opening of the upper box body through a connecting hole, a circle of convex edges are arranged around the opening of the upper box body connecting opening, and the two convex edges are connected in a bolted mode to realize detachable connection between the upper box body and the middle box body.

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