CN219843956U - Pulling device and four-wheel miniature cultivation equipment - Google Patents

Abstract

The utility model relates to the technical field of agricultural machinery, in particular to a pulling device which is applied to four-wheel miniature tillage equipment and is used for realizing rear pulling of rotary working tools and no rotary working tools. The utility model also provides four-wheel miniature cultivation equipment which has the advantages of low price, light weight, small volume, flexible and stable steering, high cultivation efficiency and the like and has a four-wheel walking mode, a two-wheel walking mode or a plurality of four-wheel cultivation modes.

Description

Pulling device and four-wheel miniature cultivation equipment

Technical Field

The utility model relates to the technical field of agricultural machinery, in particular to a pulling device and four-wheel miniature farming equipment.

Background

The miniature cultivation equipment is widely suitable for cultivation of dry lands, paddy fields, orchards, vegetable lands, tobacco lands and the like in plain, mountain areas and hills, and can carry out various operations by being matched with corresponding tools.

The miniature tillage equipment in the prior art usually adopts a hand-held design, and the miniature tillage equipment has the problems that: hand-held cultivation, high labor intensity, laborious steering, poor comfort, low cultivation efficiency and the like. The agricultural tractor is connected with agricultural machinery or a trailer in a pulling mode and is used for cultivating, harvesting or realizing other operations. The agricultural tractor has large volume and heavy weight, is not suitable for transportation and operation in mountainous areas and hills, has high purchase cost and poor economy, and has certain limitation. For this reason, the applicant has developed a new four-wheel riding mini-tiller, based on which the existing mini-tiller and the tractor are not suitable, and therefore a hitch is needed that can be used in combination with this.

Disclosure of Invention

The first aspect of the present utility model is to provide a hitch for a four-wheel mini tiller for use in a rear hitch rotary work implement.

The utility model provides a trailer device, the trailer device is applied to four-wheel miniature cultivation equipment, includes the detachable rear-mounted transmission case that can drive first rear-mounted machines operation, rear-mounted transmission case is connected with four-wheel miniature cultivation equipment's rear gearbox transmission.

The utility model has the beneficial effects that: through setting up the rear-mounted transmission case, can drive first rear-mounted tool operation, wherein first rear-mounted tool is the rotatory operation tool, including but not limited to rotary blade, weeding wheel etc. to the rear-mounted transmission case is detachable, when need not to pull first rear-mounted tool, can wholly pull down the rear-mounted transmission case, and can not cause the influence to other service scenarios, like pull need not rotatory operation tool. The rear transmission case is in transmission connection with the rear gearbox of the four-wheel miniature tillage equipment, and power can be transmitted to the rear transmission case through the rear gearbox without additional power, so that the whole machine of the four-wheel miniature tillage equipment can be ensured to be lighter.

The preferred embodiment of the utility model is as follows: the rear gearbox is characterized by further comprising a pulling connection assembly connected to the rear gearbox, and the pulling connection assembly is detachably connected with a second rear machine or the rear gearbox.

Description: the second rear-mounted implement means that no rotating work implement is required, including but not limited to ridgers, backfill knives, fertilizing boxes, ploughshares, and the like.

The beneficial effects are that: the second rear-mounted tool can be used for being pulled by the pulling connection assembly, namely, the rotating operation tool is not needed, so that various operations are realized, and the pulling connection assembly can also be used for installing the rear-mounted transmission box when the rotating operation tool is needed to be pulled.

The preferred embodiment of the utility model is as follows: the rear transmission case is internally provided with a forward transmission component, a reverse transmission component and an output component which can be switched into forward rotation, reverse rotation and neutral gear, and the output component is in transmission with the first rear machine.

The beneficial effects are that: through the transmission cooperation of the output assembly, the forward transmission assembly and the reverse transmission assembly, forward rotation and reverse rotation cultivation can be realized when the towed rotary operation tool is installed on a rear output shaft of the output assembly, and the operation can be switched to neutral gear when the operation is not needed.

The preferred embodiment of the utility model is as follows: the forward transmission assembly comprises a first transmission shaft, a first transmission wheel, a second transmission gear and a third transmission gear are respectively arranged on the first transmission shaft, the second transmission gear and the third transmission gear are rear-mounted duplex gears capable of sliding along the first transmission shaft, the first transmission wheel is in transmission connection with a rear gearbox, the reverse transmission assembly comprises a second transmission shaft, a fourth transmission gear and a fifth transmission gear are respectively arranged on the second transmission shaft, the fourth transmission gear can be meshed with the second transmission gear, the output assembly comprises a rear-mounted output shaft, a sixth transmission gear and a seventh transmission gear are respectively arranged on the rear-mounted output shaft, the sixth transmission gear can be meshed with the third transmission gear, and the seventh transmission gear is meshed with the fifth transmission gear.

The beneficial effects are that: as a preferred design method of the rear transmission case, the sixth transmission gear is engaged with the third transmission gear to realize forward rotation, and the seventh transmission gear is engaged with the fifth transmission gear, so that the fourth transmission gear is engaged with the second transmission gear to realize reverse rotation, and when the fourth transmission gear is not engaged with the second transmission gear, a neutral gear is realized.

The preferred embodiment of the utility model is as follows: the forward transmission assembly comprises a first transmission shaft, a first transmission wheel, a second transmission gear and a third transmission gear are respectively arranged on the first transmission shaft, the first transmission wheel is in transmission connection with a rear gearbox, the reverse transmission assembly comprises a second transmission shaft, a fourth transmission gear and a fifth transmission gear are respectively arranged on the second transmission shaft, the fourth transmission gear is meshed with the second transmission gear, the output assembly comprises a rear output shaft, a sixth transmission gear and a seventh transmission gear are respectively arranged on the rear output shaft, the sixth transmission gear and the seventh transmission gear are rear duplex gears capable of sliding along the rear output shaft, the sixth transmission gear can be meshed with the third transmission gear, and the seventh transmission gear can be meshed with the fifth transmission gear.

The beneficial effects are that: as another preferable design mode of the rear transmission case, the sixth transmission gear is meshed with the third transmission gear to realize forward rotation, and the seventh transmission gear is meshed with the fifth transmission gear to realize reverse rotation, and when the seventh transmission gear and the fifth transmission gear are not meshed, the neutral gear is realized.

The preferred embodiment of the utility model is as follows: the gear shifting device comprises a gear shifting rod, a gear shifting fork, a rear gear shifting assembly and a rear gear shifting assembly, wherein the gear shifting rod is arranged on the gear shifting rod, the gear shifting fork is connected with the gear shifting rod, and the end part of the gear shifting fork is connected with a rear double gear.

The beneficial effects are that: the reverse gear assembly is arranged to realize the reversing operation of forward rotation, reverse rotation or neutral gear.

The preferred embodiment of the utility model is as follows: the traction connection assembly comprises a fixing piece arranged on a rear gearbox, a first connecting piece detachably connected with the fixing piece, a first installation piece arranged at the end part of the first connecting piece and comprising a first bottom plate and first bending plates positioned on two sides of the first bottom plate, and a plurality of second connecting holes capable of being connected with the connecting piece are correspondingly formed in the two first bending plates.

The beneficial effects are that: the first connecting component is detachably connected with the four-wheel riding type mini-tiller through the fixing piece and the first connecting piece, the first mounting piece adopts the form of the first bottom plate and the first bending plates positioned on two sides of the first bottom plate, and a plurality of first mounting holes are correspondingly formed in the two first bending plates, so that the corresponding positioning pieces are mounted in the first mounting holes formed in the two first bending plates, the connection strength of the first bending plates on two sides can be guaranteed, and quick disassembly and quick assembly can be realized.

The second object of the present utility model is to provide a four-wheel mini-tiller which can be used for rear-mounted rotary operation or without rotary operation, and which has the advantages of low cost, light weight, small volume, flexible and stable steering, etc. compared with a tractor, and has the advantages of high tillage efficiency, greatly reduced labor intensity of operators, etc. compared with the existing mini-tiller.

A four-wheel mini tiller comprising a hitch as claimed in any one of the preceding claims, and further comprising a rear gearbox comprising a rear housing, a rear drive assembly and a rear steering assembly, the rear drive assembly comprising a rear power input shaft mounted in the rear housing, a rear intermediate shaft and a reduction gear set, the rear power input shaft being slidingly connected with a double gear comprising a rear input shaft first gear and a rear input shaft second gear; the rear intermediate shaft is provided with a rear intermediate shaft speed reducing gear, a rear intermediate shaft first-stop gear and a rear intermediate shaft second-stop gear; the double gears can be switched to the engagement of the first gear of the rear input shaft and the first gear of the rear intermediate shaft or the engagement of the second gear of the rear input shaft and the second gear of the rear intermediate shaft or the non-engagement of the two gears when sliding; the rear intermediate shaft reduction gear is in transmission connection with a reduction gear set, and the reduction gear set is output to a rear wheel shaft of the cultivation equipment; the rear steering assembly is used for controlling the duplex gear to slip and switch gears.

The beneficial effects are that: in the scheme, the rear gearbox is provided with two rear forward gears (specifically a low-speed cultivation gear and a high-speed walking gear), the rear control assembly controls the duplex gear to be slidingly switched to the low-speed cultivation gear when the rear input shaft first gear is meshed with the rear intermediate shaft first gear, at the moment, the rear gearbox is matched with the front gearbox, the power of the rear gearbox is used for driving walking wheels to walk, the power of the front gearbox is used for driving cultivation tools to cultivate, and the two gears are matched together to realize better cultivation; when the rear control assembly controls the duplex gear to be slidingly switched to the second gear of the rear input shaft and the second gear of the rear intermediate shaft to be meshed, the duplex gear is a high-speed walking gear, at the moment, the power of the rear gearbox and the power of the front gearbox are both used for driving walking wheels to walk, and the duplex gear is of a four-wheel drive structure and can be used for pulling goods or ascending a slope; when the rear control assembly controls the duplex gear to slide and switch to a state that the duplex gear is not meshed with the gears on the rear intermediate shaft, the rear gearbox is in a neutral gear state, and at the moment, the power of the front gearbox is used for driving the travelling wheels to walk, and the rear gearbox is of a two-wheel driving structure and can be used in a scene of walking without dragging goods and on the ground. The rear gearbox structure adopting the scheme can be applied to various occasions such as cultivation, cargo pulling, ascending, land leveling and the like, and the power output is richer and more flexible.

The preferred embodiment of the utility model is as follows: the front transmission assembly comprises a front power input shaft, a front middle shaft, a reverse gear shaft and a front power output shaft which are arranged in the front shell, and an input shaft constant-meshed gear is arranged on the front power input shaft; the front intermediate shaft is provided with a triple gear and a front intermediate shaft constant meshing gear meshed with the input shaft constant meshing gear, the triple gear is in sliding connection with the front intermediate shaft, and the triple gear comprises a front intermediate shaft first-gear, a front intermediate shaft second-gear and a front intermediate shaft third-gear; the front power output shaft is provided with a front output shaft first-gear, a front output shaft second-gear and a front output shaft third-gear; the reverse gear shaft is provided with a reverse gear and a reverse gear idler wheel, and the reverse gear idler wheel is meshed with a first gear of the front output shaft; when the triple gear slides, the first gear of the front intermediate shaft is meshed with the first gear of the front output shaft, or the second gear of the front intermediate shaft is meshed with the second gear of the front output shaft, or the third gear of the front intermediate shaft is meshed with the third gear of the front output shaft, or the third gear of the front intermediate shaft is meshed with the reverse gear, or the third gears of the front intermediate shaft are not meshed; the front control assembly is used for controlling the triple gear to slide and switch gears.

The beneficial effects are that: in the scheme, the front gearbox is provided with three front forward gears, when in cultivation or walking, the power output of the front gearbox drives a cultivation tool or a walking wheel, and according to the cultivation or walking requirement, the triple gear can be controlled by the front control assembly to slide until the front intermediate shaft first-gear is meshed with the front output shaft first-gear (corresponding to the first gear), or the front intermediate shaft second-gear is meshed with the front output shaft second-gear (corresponding to the second gear), or the front intermediate shaft third-gear is meshed with the front output shaft third-gear (corresponding to the third gear). The multi-gear arrangement is adopted, for example, when in cultivation, the power of the front gearbox is output to a cultivation tool, and the first gear, the second gear and the third gear can be respectively used for cultivating hard soil, harder soil and loose soil; when walking, the first gear, the second gear and the third gear are respectively used for controlling the walking speed, is suitable for various scenes and meets various cultivation and walking requirements.

The preferred embodiment of the utility model is as follows: still include transmission shaft and articulated connecting portion, the transmission shaft turns to connecting portion, first connecting axle and back including the preceding steering connection portion that connects gradually, and first connecting axle turns to connecting portion sliding connection with the back, the power output shaft of preceding gearbox turns to the connecting portion transmission with the front and is connected, the power input shaft of back gearbox turns to the connecting portion transmission with the back and is connected, articulated connecting portion is including all cladding at the outer structure and the protection body of turning to of transmission shaft, turn to structure one side and the casing connection of preceding gearbox, turn to structure opposite side and protection body one end and articulate, the protection body other end is connected with the casing of back gearbox, the protection is relative to turn to the structure and can rotate in the horizontal direction.

The beneficial effects are that: the transmission shaft adopts the front steering connecting part, the first connecting shaft and the rear steering connecting part which are sequentially connected, and can transmit power to the front wheel shaft and the rear wheel shaft through a simple and ingenious structure, so that the four-wheel micro farming equipment four-wheel drive function is realized, and the transmission shaft structure can realize the steering effect when transmitting power. The transmission shaft adopts the structure of this scheme, cost reduction that can be very big, and this simple structure can let the structure of complete machine more simple compact moreover, light in weight and small. In addition, when the transmission mechanism is applied to four-wheel miniature tillage equipment, the inventor finds that the distance between the front wheel axle and the rear wheel axle of the tillage equipment can change in the steering process, and when the rear steering connecting part is in sliding connection with the first connecting shaft, a certain degree of freedom can be provided for compensating the distance change between the front wheel axle and the rear wheel axle of the four-wheel miniature tillage equipment, so that the service life of the tillage equipment can be prolonged.

The steering structural member and the protective body are coated outside the transmission shaft, so that potential safety hazards caused by the rolling of operators can be effectively prevented, or other foreign matters are rolled into the transmission shaft to be damaged, on the other hand, the protective body is hinged to the steering structural member through the structure of the matching transmission shaft, plays a role in jointly steering, can realize more stable steering, is better in integrity, and ensures the flexibility of steering.

Drawings

FIG. 1 is a schematic view of a pulling connection assembly according to a first embodiment of the pulling device of the present utility model;

FIG. 2 is a schematic view of the internal structure of a rear transmission case in a first embodiment of the pulling device of the present utility model;

FIG. 3 is a schematic view of a rear drive box connection in accordance with an embodiment of the present utility model;

FIG. 4 is a schematic view of a gear shifting assembly according to a first embodiment of the hitch of the present utility model;

FIG. 5 is a schematic view of a rear gearbox in a first embodiment of a four-wheel mini tiller of the present utility model;

FIG. 6 is a schematic view of a front gearbox in a first embodiment of a four-wheel mini tiller of the present utility model;

FIG. 7 is a schematic view of a transmission shaft in a first embodiment of a four-wheel mini tiller of the present utility model;

FIG. 8 is a schematic view of a hinge connection in a first embodiment of a four-wheel mini tiller of the present utility model;

FIG. 9 is a schematic view of a rear-mounted single-sided plow share in a first embodiment of a four-wheel mini tiller of the present utility model;

FIG. 10 is a schematic view of a rear-mounted rotary blade assembly of a four-wheeled miniature tiller embodiment of the present utility model;

FIG. 11 is a schematic view of the internal structure of a rear drive box in a second embodiment of the hitch of the present utility model.

Detailed Description

The following description of the preferred embodiments of the present utility model is provided in connection with the accompanying drawings, and it should be understood that the preferred embodiments described below are for illustration only and are not intended to limit the scope of the present utility model.

The terms first, second and the like in the description, in the claims and in the embodiments of the utility model, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

The utility model is further described in detail below with reference to the preferred embodiments:

example 1

Reference numerals in the drawings of the specification include:

front gearbox 1, front power input shaft 101, input shaft constant mesh gear 1011, front countershaft 102, front countershaft constant mesh gear 1021, front countershaft first gear 1022, front countershaft second gear 1023, front countershaft third gear 1024, front power output shaft 103, front output shaft first gear 1031, front output shaft second gear 1032, front output shaft third gear 1033, reverse gear 104, reverse gear 1041, reverse gear idler 1042;

a transmission shaft 2, a front universal joint 201, a first connecting shaft 202, a rear universal joint 203, a front cross 204, a rear cross 205;

A rear gearbox 3, a rear power input shaft 301, a rear input shaft first gear 3011, a rear input shaft second gear 3012, a rear intermediate shaft 302, a rear intermediate shaft reduction gear 3021, a rear intermediate shaft first gear 3022, a rear intermediate shaft second gear 3023, a reduction gear set 303;

a connection plate 401, a shielding body 402 and a mounting plate 403;

rear output assembly 5, third connecting shaft 501, third bevel gear transmission 502;

rear gearbox connecting piece 7, first connecting hole 701, shift fork 801, shift fork shaft 802, shift lever 803, connecting column 804, pull rod 805, rear gearbox housing 806, fixing piece 901, U-shaped piece 902, rectangular tube 903, first mounting piece 904, and connecting piece 905;

a first drive shaft 111, a first drive wheel 112, a second drive gear 113, a third drive gear 114, a fourth drive gear 115, a fifth drive gear 116, a second drive shaft 117, a rear output shaft 118, a sixth drive gear 119, a seventh drive gear 120;

ploughshare 130, connection sleeve 1301, connection plate 1302, rotary blade assembly 140, and blade holder securing tube 1401.

The embodiment discloses a pulling device which is applied to four-wheel miniature farming equipment. The four-wheel riding type mini tiller according to this embodiment has a weight of 150-300Kg, a length of 1.2-2 m and a width of 0.5-0.9 m. The four-wheel riding type mini-tiller adopts riding type tillage equipment with detachable front wheel axle and/or rear wheel axle to install tillage equipment or travelling wheels, when tillage is performed, tillage operation can be performed by installing tillage equipment such as rotary tillage blades or weeding wheels on the front wheel axle and/or the rear wheel axle, and when the mini-tiller is further operated, the tillage equipment is more preferably installed on the front wheel axle, and the travelling wheels are installed on the rear wheel axle; when walking, the front wheel axle and the rear wheel axle are provided with four walking wheels. In addition, the four-wheel riding type miniature tillage equipment can also be used for pulling a rear-mounted machine, the rear-mounted machine can be used for rotating the rear-mounted machine, or the rear-mounted machine can be used for working without rotating the rear-mounted machine, for example, the rear-mounted machine can be a rotary tillage blade or a weeding wheel, and after pulling other rear-mounted machines, tillage operations such as rotary tillage, weeding, ditching, seeding, pesticide spraying, ridging, earthing and harvesting can be carried out. Compared with the existing hand-held mini tiller, the four-wheel riding mini tiller has the advantages of light weight, small volume and low price, is stable and flexible in steering, small in turning radius, has multiple driving modes, is particularly suitable for mountain and hilly land operation, is more abundant in applicable scene, greatly reduces labor intensity of operators, and is higher in cultivation efficiency.

As shown in fig. 1, the pulling device of the present embodiment includes a pulling connection component connected to the rear gearbox, where the pulling connection component is detachably connected to a second rear implement or the rear gearbox, and the second rear implement in the present embodiment does not need to rotate a working implement, including but not limited to a ridger, a backfilling knife, a fertilizing box, a ploughshare, and the like.

The pull connection assembly comprises a fixing part 901 arranged on a rear gearbox, a first connecting part 905 detachably connected with the fixing part 901, specifically, the first connecting part 905 comprises a U-shaped part 902 connected with the fixing part 901 through a bolt, and a rectangular pipe 903 with one end connected with the U-shaped part 902, the other end of the rectangular pipe 903 is connected with a first mounting part 904, the first mounting part 904 comprises a first bottom plate and first bending plates positioned on two sides of the first bottom plate, the first bottom plate and the first bending plates positioned on two sides of the first bottom plate preferably form the U-shaped mounting part, other shapes such as an 'F' -shaped channel steel shape can be formed in other embodiments, the shapes are all in the protection range, a plurality of second connecting holes of the connectable connecting parts 905 are correspondingly formed in the two first bending plates, three second connecting holes are preferably formed in the embodiment, and the connecting parts 905 can be bolts or connecting pins.

In other embodiments, the fixing member may also be a fixing block disposed on the rear gearbox, the fixing block is provided with a threaded hole, the first connecting member includes a circular tube with one end screwed with the fixing block, the other end of the circular tube is also screwed with the first mounting member, so that the first mounting member is convenient to detach, the first mounting member adopts the mounting block, and the mounting block is provided with a plurality of threaded holes, and is connected with the second rear machine or the rear gearbox through bolts.

As shown in fig. 9, a schematic structure of an existing ploughshare 130 is shown, the ploughshare 130 includes a connection sleeve 1301 and a U-shaped connection plate 1302, the connection sleeve 1302 is provided with mounting holes corresponding to the connection sleeve, if the ploughshare 130 is required to be pulled in a rear position, the connection sleeve 1301 and the connection plate 1302 are integrally placed between two first bending plates of the first mounting piece 904, so that the connection sleeve, the mounting holes and the second connection hole are opposite, and then the quick assembly can be realized by positioning through bolts or pins.

The pulling device of this embodiment further includes a detachable rear-mounted transmission box capable of driving the first rear-mounted tool to operate, where the first rear-mounted tool in this embodiment refers to a rotary operation tool, including but not limited to a rotary blade, a weeding wheel, etc.

The rear transmission case is in transmission connection with a rear gearbox of the four-wheel mini-tiller, as shown in fig. 1, specifically, the rear transmission case and a rear power input shaft of the rear gearbox of the four-wheel mini-tiller are in chain transmission or belt transmission, and in this embodiment, the driving sprocket can be mounted on the rear power input shaft by preferably adopting chain transmission.

In this embodiment, the housing (not shown) of the rear gearbox is generally similar in shape to the rear gearbox. As shown in fig. 3, a rear transmission case connecting piece 7 can be arranged at the position of the pulling connection component on the rear transmission case, a first connecting hole 701 corresponding to the second connecting hole is formed in the rear transmission case connecting piece 7, and when the rear transmission case connecting piece 7 is installed, the rear transmission case connecting piece 7 stretches into the inner sides of the two first bending plates and is connected in the first connecting hole 701 and the second connecting hole, so that the installation of the rear transmission case can be completed, when a rotary operation tool is not required to be pulled, the whole rear transmission case is detached, and a driving sprocket and a chain installed on a rear power input shaft are detached, so that the installation of the pulling connection component is not required to be rotated. The connection may preferably be a bolt.

In this embodiment, the rear-mounted transmission case is provided with a forward transmission assembly, a reverse transmission assembly and an output assembly, and the output assembly is in transmission with the first rear-mounted machine. Specifically, as shown in fig. 2, the forward transmission assembly includes a first transmission shaft 111, a first transmission wheel 112, a second transmission gear 113 and a third transmission gear 114 are respectively provided on the first transmission shaft 111, the second transmission gear 113 and the third transmission gear 114 are rear-mounted dual gears that can slide along the first transmission shaft, the first transmission wheel 112 is in transmission connection with a rear gearbox, the first transmission wheel 112 preferably adopts a driven sprocket, a driving sprocket of the rear gearbox and a driven sprocket of the rear gearbox are driven by a chain, the reverse transmission assembly includes a second transmission shaft 117, a fourth transmission gear 115 and a fifth transmission gear 116 are respectively provided on the second transmission shaft 117, the fourth transmission gear 115 can be meshed with the second transmission gear 113, the output assembly includes a rear-mounted output shaft 118, a sixth transmission gear 119 and a seventh transmission gear 120 are respectively provided on the rear-mounted output shaft 118, the sixth transmission gear 119 can be meshed with the third transmission gear 114, and the seventh transmission gear 120 is meshed with the fifth transmission gear 116.

As shown in fig. 10, in this embodiment, the rotary blade assembly 140 is driven by a rear transmission case, and the rear rotary blade assembly is driven by a rear transmission case to implement rear rotary tillage operation by installing a blade holder fixing tube 1401 of the rotary blade assembly 140 on the rear output shaft 118 through a positioning pin or a positioning bolt.

In this embodiment, the rear shift assembly further comprises a rear shift block assembly, the rear shift block assembly comprises a shift lever 803 and a shift fork 801 connected with the shift lever 803, and the end of the shift fork 801 is connected with a rear duplex gear. As shown in fig. 4, specifically: one end of a shifting fork 801 of the rear displacement gear assembly is connected between the rear duplex gears, the other end of the shifting fork is in sliding fit with a shifting fork shaft 802, one end of the shifting fork 801 in sliding fit with the shifting fork shaft 802 is connected with one end of a shifting rod 803, the shifting rod 803 can drive the shifting fork 801 to slide along the shifting fork shaft 802, the other end of the shifting rod 803 is connected with a connecting column 804, the connecting column 804 penetrates through a shell of a rear transmission case, one end of the connecting column 804 penetrating through a shell 806 of the rear transmission case is connected with a pull rod 805, and the pull rod 805 can be connected to a gear shifting operation position of four-wheel mini-tiller through a pull wire.

The principle is as follows: by pulling the lever 805, the connecting column 804 can be rotated in the horizontal direction, so as to drive the gear shift lever 803 to swing around the connecting column 804, and the swing of the gear shift lever 803 can drive the gear shift fork 801 to slide along the gear shift shaft 802, so as to drive the rear duplex gear to mesh with different gears, if the sixth transmission gear 119 is meshed with the third transmission gear 114, the fourth transmission gear 115 is meshed with the second transmission gear 113, and meanwhile, the seventh transmission gear 120 is meshed with the fifth transmission gear 116, the rear duplex gear is not meshed with any gear, and the rear duplex gear is at the moment in neutral gear.

The embodiment also discloses four-wheel miniature farming equipment, which comprises the traction device.

Further, as shown in fig. 5, the four-wheel mini-tiller further comprises a rear gearbox 3, wherein the rear gearbox 3 comprises a rear power input shaft 301, a rear middle shaft 302 and a reduction gear set 303, a double gear is connected to the rear power input shaft 301 in a sliding manner, the double gear comprises a rear input shaft first-gear 3011 and a rear input shaft second-gear 3012, and the rear power input shaft 301 is in transmission connection with a rear universal joint 203; the rear intermediate shaft 302 is provided with a rear intermediate shaft reduction gear 3021, a rear intermediate shaft first gear 3022 and a rear intermediate shaft second gear 3023; when the duplex gear slides, the rear input shaft first-gear 3011 and the rear intermediate shaft first-gear 3022 can be meshed (corresponding to a low-speed cultivation gear), or the rear input shaft second-gear 3012 and the rear intermediate shaft second-gear 3023 can be meshed (corresponding to a high-speed walking gear), or the duplex gear and the gear on the rear intermediate shaft 302 can be not meshed (corresponding to a neutral gear); the rear intermediate shaft reduction gear 3021 is in driving connection with the reduction gear set 303, and the reduction gear set 303 is output to the rear wheel axle of the farming equipment.

In some other embodiments, the gear setting of the rear gearbox 3 may be other gear number settings besides the low-speed cultivation gear and the high-speed walking gear in the above embodiments, for example, three gears, and the setting mode of the gear number of the other rear forward gears adopts the existing gear setting mode, which is not described herein. The rear operating assembly is used for controlling the duplex gear to slip and switch gears.

The rear output assembly 5 includes a third connecting shaft 501, a third bevel gear transmission structure 502, and the rear universal joint 203 is driven by the third connecting shaft 501 and is in driving connection with the power input shaft of the rear gearbox 3 by the third bevel gear transmission structure 502.

As shown in fig. 6, the front gearbox 1 is further included, the front gearbox 1 includes a front power input shaft 101, a front intermediate shaft 102, a front power output shaft 103 and a reverse gear shaft 104, and an input shaft constant mesh gear 1011 is arranged on the front power input shaft 101; the front intermediate shaft 102 is provided with a triple gear and a front intermediate shaft constant meshing gear 1021 meshed with the input shaft constant meshing gear 1011, the triple gear is in sliding connection with the front intermediate shaft 102, and the triple gear comprises a front intermediate shaft first gear 1022, a front intermediate shaft second gear 1023 and a front intermediate shaft third gear 1024; the front power output shaft 103 is provided with a front output shaft first-gear 1031, a front output shaft second-gear 1032 and a front output shaft third-gear 1033, and the front power output shaft 103 is in transmission connection with the front universal joint 201; the reverse gear shaft 104 is provided with a reverse gear 1041 and a reverse gear idler gear 1042, and the reverse gear idler gear 1042 is meshed with a front output shaft first gear 1031; when the triple gear slides, the front intermediate shaft first gear 1022 is meshed with the front output shaft first gear 1031 (corresponding to first gear), the front intermediate shaft second gear 1023 is meshed with the front output shaft second gear 1032 (corresponding to second gear), the front intermediate shaft third gear 1024 is meshed with the front output shaft third gear 1033 (corresponding to third gear), the front intermediate shaft third gear 1024 is meshed with the reverse gear 1041 (corresponding to reverse gear), or the triple gear is not meshed with the gear on the front output shaft or the gear on the reverse gear shaft 104 (corresponding to neutral gear).

In some other embodiments, the gear setting of the front gearbox 1 may also be the gear number setting of other front forward gears except for the third gear in the above embodiments, for example, the gear number setting of the other front forward gears adopts the existing gear setting mode, and will not be described herein.

The front gearbox 1 and the rear gearbox 3 can be matched and switched to a four-wheel drive walking mode, a plurality of four-wheel drive cultivation modes or a two-wheel drive walking mode.

The front gearbox 1 is provided with 3 forward gears, the rear gearbox 3 is provided with 2 forward gears (specifically: low-speed cultivation gear and high-speed walking gear), the front gearbox 1 and the rear gearbox 3 can be matched and switched to a three-gear four-drive walking mode, a plurality of four-drive cultivation modes or a three-gear two-drive walking mode, and the power output mode is specifically as follows:

(1) three-gear four-wheel drive walking mode: in the front gearbox 1, the triple gear slides to enable the front intermediate shaft first gear 1022 to be meshed with the front output shaft first gear 1031, or the front intermediate shaft second gear 1023 to be meshed with the front output shaft second gear 1032, or the front intermediate shaft third gear 1024 to be meshed with the front output shaft third gear 1033 (corresponding to a first gear, a second gear and a third gear four-drive running mode respectively), power is input through the front power input shaft 101 of the front gearbox 1, is transmitted to the front intermediate shaft constant-meshed gear 1021 through the input shaft constant-meshed gear 1011, is transmitted to the front output shaft first gear 1031 through the front intermediate shaft first gear 1022, is transmitted to the front output shaft second gear 1032 to be meshed with the front intermediate shaft second gear 1023, or is transmitted to the front output shaft third gear 1033 to be meshed with the front intermediate shaft third gear 1024, and the front power output shaft 103 outputs power to the running wheels; in the rear gearbox 3, the dual gear slides to enable the rear input shaft second gear 3012 to be meshed with the rear intermediate shaft second gear 3023 (a high-speed walking gear is adopted), power of the front power output shaft 103 is further transmitted to the rear power input shaft 301 through the transmission shaft 2, is transmitted to the rear intermediate shaft second gear 3023 through the rear input shaft second gear 3012, drives the rear intermediate shaft reduction gear 3021 through the rear intermediate shaft 302, and outputs power to the walking wheels through the reduction gear set 303.

(2) Four-wheel drive cultivation mode 1: in the front gearbox 1, the triple gear slides to enable the front intermediate shaft first gear 1022 to be meshed with the front output shaft first gear 1031, power is input through the front power input shaft 101 of the front gearbox 1, is transmitted to the front intermediate shaft normally meshed gear 1021 through the input shaft normally meshed gear 1011 and is transmitted to the front output shaft first gear 1031 through the front intermediate shaft first gear 1022, and the front power output shaft 103 outputs power to the tillage implement 8; in the rear gearbox 3, the double gears slide to enable the rear input shaft first-stop gear 3011 to be meshed with the rear intermediate shaft first-stop gear 3022 (a low-speed cultivation gear is adopted), power of the front power output shaft 103 is further transmitted to the rear power input shaft 301 through the transmission shaft 2, is transmitted to the rear intermediate shaft first-stop gear 3022 through the rear input shaft first-stop gear 3011, drives the rear intermediate shaft reduction gear 3021 through the rear intermediate shaft 302, and then outputs power to the travelling wheels through the reduction gear set 303.

(3) Four-wheel drive farming mode 2: in the front gearbox 1, the triple gear slides to enable the front intermediate shaft second gear 1023 to be meshed with the front output shaft second gear 1032, power is input through the front power input shaft 101 of the front gearbox 1, is transmitted to the front intermediate shaft normally meshed gear 1021 through the input shaft normally meshed gear 1011, is transmitted to the front output shaft second gear 1032 through the front intermediate shaft second gear 1023, and is output to the tillage implement 8 through the front power output shaft 103; in the rear gearbox 3, the double gears slide to enable the rear input shaft first-stop gear 3011 to be meshed with the rear intermediate shaft first-stop gear 3022 (a low-speed cultivation gear is adopted), power of the front power output shaft 103 is further transmitted to the rear power input shaft 301 through the transmission shaft 2, is transmitted to the rear intermediate shaft first-stop gear 3022 through the rear input shaft first-stop gear 3011, drives the rear intermediate shaft reduction gear 3021 through the rear intermediate shaft 302, and then outputs power to the travelling wheels through the reduction gear set 303.

(4) Four-wheel drive cultivation mode 3: in the front gearbox 1, the triple gear slides to enable the front intermediate shaft three-gear 1024 to be meshed with the front output shaft three-gear 1033, power is input through the front power input shaft 101 of the front gearbox 1, is transmitted to the front intermediate shaft constant-meshed gear 1021 through the input shaft constant-meshed gear 1011, is transmitted to the front output shaft three-gear 1033 through the front intermediate shaft three-gear 1024, and the front power output shaft 103 outputs power to the tillage implement 8; in the rear gearbox 3, the double gears slide to enable the rear input shaft first-stop gear 3011 to be meshed with the rear intermediate shaft first-stop gear 3022 (a low-speed cultivation gear is adopted), power of the front power output shaft 103 is further transmitted to the rear power input shaft 301 through the transmission shaft 2, is transmitted to the rear intermediate shaft first-stop gear 3022 through the rear input shaft first-stop gear 3011, drives the rear intermediate shaft reduction gear 3021 through the rear intermediate shaft 302, and then outputs power to the travelling wheels through the reduction gear set 303.

(5) Three-gear two-drive walking mode: in the front gearbox 1, the triple gear slides to enable the front intermediate shaft first gear 1022 to be meshed with the front output shaft first gear 1031, or the front intermediate shaft second gear 1023 to be meshed with the front output shaft second gear 1032, or the front intermediate shaft third gear 1024 to be meshed with the front output shaft third gear 1033 (corresponding to a first gear, a second gear or a third gear two-drive running mode respectively), power is input through the front power input shaft 101 of the front gearbox 1, is transmitted to the front intermediate shaft normally meshed gear 1021 through the input shaft normally meshed gear 1011, is transmitted to the front output shaft first gear 1031 through the front intermediate shaft first gear 1022, is transmitted to the front output shaft second gear 1032 through the front intermediate shaft second gear 1023, or is transmitted to the front output shaft third gear 1033 through the front intermediate shaft third gear 1024, and the front power output shaft 103 outputs power to the running wheels; in the rear gearbox 3, the double gears slide so that neither the double gears nor the gears on the rear intermediate shaft 302 mesh (neutral state), and the rear gearbox 3 does not output power.

As shown in fig. 7, the four-wheel mini-tiller of this embodiment further includes a propeller shaft 2. The transmission shaft 2 comprises a front steering connecting part, a first connecting shaft 202 and a rear steering connecting part which are sequentially connected, a power output shaft of the front gearbox 1 is in transmission connection with the front steering connecting part, a power input shaft of the rear gearbox 3 is in transmission connection with the rear steering connecting part, and in the embodiment, the front steering connecting part and the rear steering connecting part are respectively a front universal joint 201 and a rear universal joint 203. In some other embodiments, the front steering connection and the rear steering connection may be other structures similar to a universal joint that can be driven or steered. Front gimbal 201 includes a front cross 204 and rear gimbal 203 includes a rear cross 205, with diameters D of front and rear cross 204, 205 ranging from 10-20mm. In addition, the front universal joint 201 or the rear universal joint 203 is slidably connected to the first connecting shaft 202, and the present embodiment preferably employs the rear universal joint 203 to be slidably connected to the first connecting shaft 202.

As shown in fig. 8, the four-wheel mini-tiller of this embodiment further includes a hinge connection.

The rear gearbox 3 and the front gearbox 1 are provided with hinged connections, the hinge points of which are located in the area between the front universal joint 201 and the rear universal joint 203. The articulated connecting portion includes the structure that turns to, the protection body 402 of all cladding outside transmission shaft 2, and in this embodiment, turns to the structure and includes two mounting panels 403 and two connecting plates 401, and two mounting panels 403 pass through bolted connection with the casing both sides of preceding gearbox 2 respectively, and two connecting plates 401 are connected between two mounting panels 403, preferably weld and form a whole, the upper and lower side lateral wall of protection body 402 articulates with two connecting plates 401 respectively, and protection body 402 can rotate at the horizontal direction relative connecting plate 401.

On the one hand, the protection body 402 cladding is outside transmission shaft 2, can prevent effectively that operating personnel from rolling into and cause the potential safety hazard, perhaps have other foreign matter to roll into and become to damage to the transmission structure, on the other hand, the protection body 402 through with the articulated design of connecting plate 401, the structure setting of universal joint 201 before the cooperation, first connecting axle 202, back universal joint 203 plays the effect that turns to jointly, can realize more stable turning to, be difficult for turning on one's side, the wholeness is better, and ensures the flexibility that turns to.

Example two

The first difference between this embodiment and the second embodiment is that the rear transmission case has a different transmission structure.

Reference numerals of fig. 11 of the specification include:

a first transmission shaft 601, a first transmission wheel 602, a second transmission gear 603, a third transmission gear 604, a second transmission shaft 605, a fourth transmission gear 606, a fifth transmission gear 607, a rear output shaft 608, a sixth transmission gear 609, and a seventh transmission gear 610.

The rear transmission case is internally provided with a forward transmission component, a reverse transmission component and an output component which can be switched into forward rotation, reverse rotation and neutral gear, and the output component is in transmission with the first rear machine. The method specifically comprises the following steps: as shown in fig. 9: the forward transmission assembly comprises a first transmission shaft 601, and a first transmission wheel 602, a second transmission gear 603 and a third transmission gear 604 are respectively arranged on the first transmission shaft 601. The first driving wheel 602 is in driving connection with the rear gearbox, in this embodiment, the first driving wheel 602 is a driven sprocket or a driven pulley, preferably a driven sprocket is adopted, and the driving sprocket is arranged on the driven sprocket and the rear power input shaft to realize power transmission.

The reversing transmission assembly comprises a second transmission shaft 605, a fourth transmission gear 606 and a fifth transmission gear 607 are respectively arranged on the second transmission shaft 605, the fourth transmission gear 606 is meshed with the second transmission gear 603, the output assembly comprises a rear output shaft 608, a rear output shaft 608 mounting piece for mounting one end of the rear output shaft 608 is arranged on a rear transmission box, a bearing is particularly arranged in the rear output shaft 608 mounting piece, a sixth transmission gear 609 and a seventh transmission gear 610 are respectively arranged on the rear output shaft 608, wherein the sixth transmission gear 609 and the seventh transmission gear 610 preferably adopt rear duplex gears capable of sliding along the rear output shaft 608, the end parts of the shifting forks are connected to the rear duplex gears, the sixth transmission gear 609 can be meshed with the third transmission gear 604 through shifting of the shifting forks so as to realize forward rotation, or the seventh transmission gear 610 can be meshed with the fifth transmission gear 607 so as to realize reverse rotation or even arrangement, and is a neutral gear.

The preferred embodiments of the present utility model have been described in detail with reference to the accompanying drawings, in which typical known structures and common general knowledge are not described in any way, and those skilled in the art can complete and practice the technical scheme of the present utility model with their own capabilities in light of the present disclosure, and some typical known structures, known methods or common general knowledge should not be taken as an obstacle for the practice of the present utility model by those of ordinary skill in the art.

The protection scope of the present utility model is subject to the content of the claims, and the content of the utility model, the detailed description and the drawings of the specification are used for explaining the claims.

Several modifications can be made to the embodiments of the present utility model within the technical concept of the present utility model, and the modified embodiments should be considered as being within the scope of the present utility model.

Claims (10)

1. A hitch, characterized by: the traction device is applied to four-wheel miniature tillage equipment and comprises a detachable rear transmission box capable of driving a first rear machine tool to work, and the rear transmission box is in transmission connection with a rear gearbox of the four-wheel miniature tillage equipment.

2. A hitch as claimed in claim 1, in which: the rear gearbox is characterized by further comprising a pulling connection assembly connected to the rear gearbox, and the pulling connection assembly is detachably connected with a second rear machine or the rear gearbox.

3. A hitch as claimed in claim 1, in which: the rear transmission case is internally provided with a forward transmission component, a reverse transmission component and an output component which can be switched into forward rotation, reverse rotation and neutral gear, and the output component is in transmission with the first rear machine.

4. A hitch as claimed in claim 3, in which: the forward transmission assembly comprises a first transmission shaft, a first transmission wheel, a second transmission gear and a third transmission gear are respectively arranged on the first transmission shaft, the second transmission gear and the third transmission gear are rear-mounted duplex gears capable of sliding along the first transmission shaft, the first transmission wheel is in transmission connection with a rear gearbox, the reverse transmission assembly comprises a second transmission shaft, a fourth transmission gear and a fifth transmission gear are respectively arranged on the second transmission shaft, the fourth transmission gear can be meshed with the second transmission gear, the output assembly comprises a rear-mounted output shaft, a sixth transmission gear and a seventh transmission gear are respectively arranged on the rear-mounted output shaft, the sixth transmission gear can be meshed with the third transmission gear, and the seventh transmission gear is meshed with the fifth transmission gear.

5. A hitch as claimed in claim 3, in which: the forward transmission assembly comprises a first transmission shaft, a first transmission wheel, a second transmission gear and a third transmission gear are respectively arranged on the first transmission shaft, the first transmission wheel is in transmission connection with a rear gearbox, the reverse transmission assembly comprises a second transmission shaft, a fourth transmission gear and a fifth transmission gear are respectively arranged on the second transmission shaft, the fourth transmission gear is meshed with the second transmission gear, the output assembly comprises a rear output shaft, a sixth transmission gear and a seventh transmission gear are respectively arranged on the rear output shaft, the sixth transmission gear and the seventh transmission gear are rear duplex gears capable of sliding along the rear output shaft, the sixth transmission gear can be meshed with the third transmission gear, and the seventh transmission gear can be meshed with the fifth transmission gear.

6. A hitch as claimed in claim 4 or claim 5, in which: the gear shifting device comprises a gear shifting rod, a gear shifting fork, a rear gear shifting assembly and a rear gear shifting assembly, wherein the gear shifting rod is arranged on the gear shifting rod, the gear shifting fork is connected with the gear shifting rod, and the end part of the gear shifting fork is connected with a rear double gear.

7. A hitch as claimed in claim 2, in which: the traction connection assembly comprises a fixing piece arranged on a rear gearbox, a first connecting piece detachably connected with the fixing piece, a first installation piece arranged at the end part of the first connecting piece and comprising a first bottom plate and first bending plates positioned on two sides of the first bottom plate, and a plurality of second connecting holes capable of being connected with the connecting piece are correspondingly formed in the two first bending plates.

8. A four-wheel mini-tiller, characterized in that: a hitch as claimed in any one of claims 1 to 7, further comprising a rear gearbox comprising a rear housing, a rear drive assembly and a rear steering assembly, the rear drive assembly comprising a rear power input shaft mounted within the rear housing, a rear intermediate shaft and a reduction gear set, the rear power input shaft being slidingly connected to a double gear comprising a rear input shaft primary gear, a rear input shaft secondary gear; the rear intermediate shaft is provided with a rear intermediate shaft speed reducing gear, a rear intermediate shaft first-stop gear and a rear intermediate shaft second-stop gear; the double gears can be switched to the engagement of the first gear of the rear input shaft and the first gear of the rear intermediate shaft or the engagement of the second gear of the rear input shaft and the second gear of the rear intermediate shaft or the non-engagement of the two gears when sliding; the rear intermediate shaft reduction gear is in transmission connection with a reduction gear set, and the reduction gear set is output to a rear wheel shaft of the cultivation equipment; the rear steering assembly is used for controlling the duplex gear to slip and switch gears.

9. A four-wheel micro tilling apparatus according to claim 8, wherein: the front transmission assembly comprises a front power input shaft, a front middle shaft, a reverse gear shaft and a front power output shaft which are arranged in the front shell, and an input shaft constant-meshed gear is arranged on the front power input shaft;

the front intermediate shaft is provided with a triple gear and a front intermediate shaft constant meshing gear meshed with the input shaft constant meshing gear, the triple gear is in sliding connection with the front intermediate shaft, and the triple gear comprises a front intermediate shaft first-gear, a front intermediate shaft second-gear and a front intermediate shaft third-gear; the front power output shaft is provided with a front output shaft first-gear, a front output shaft second-gear and a front output shaft third-gear; the reverse gear shaft is provided with a reverse gear and a reverse gear idler wheel, and the reverse gear idler wheel is meshed with a first gear of the front output shaft; when the triple gear slides, the first gear of the front intermediate shaft is meshed with the first gear of the front output shaft, or the second gear of the front intermediate shaft is meshed with the second gear of the front output shaft, or the third gear of the front intermediate shaft is meshed with the third gear of the front output shaft, or the third gear of the front intermediate shaft is meshed with the reverse gear, or the third gears of the front intermediate shaft are not meshed; the front control assembly is used for controlling the triple gear to slide and switch gears.

10. A four-wheel micro tilling apparatus according to claim 9, wherein: still include transmission shaft and articulated connecting portion, the transmission shaft turns to connecting portion, first connecting axle and back including the preceding steering connection portion that connects gradually, and first connecting axle turns to connecting portion sliding connection with the back, the power output shaft of preceding gearbox turns to the connecting portion transmission with the front and is connected, the power input shaft of back gearbox turns to the connecting portion transmission with the back and is connected, articulated connecting portion is including all cladding at the outer structure and the protection body of turning to of transmission shaft, turn to structure one side and the casing connection of preceding gearbox, turn to structure opposite side and protection body one end and articulate, the protection body other end is connected with the casing of back gearbox, the protection is relative to turn to the structure and can rotate in the horizontal direction.