CN217682057U - Mini-tiller starting mechanism and mini-tiller - Google Patents

Abstract

The utility model discloses a plough machine a little and actuating mechanism thereof, its characterized in that: the transmission main shaft is connected with an engine in a transmission mode, the other end of the transmission main shaft is connected with a starting motor in a transmission mode, and the starting motor is in transmission connection with the transmission main shaft through a speed reducing mechanism. The transmission main shaft is longitudinally arranged, the engine is arranged at the front end of the transmission main shaft, and the starting motor is arranged at the rear end of the transmission main shaft. By adopting the starting mechanism of the mini-tiller, the starting of the mini-tiller can be easily realized, and the manual starting is not needed; secondly, the reliability of starting can be improved; thirdly, the engine and the starting motor are arranged in front and at the back, so that the reliability of the whole structure can be improved, and the space can be saved and the layout can be optimized; and fourthly, the starting motor is arranged at the rear part far away from the engine, so that the influence on the performance of the starting motor caused by the heat generated by the engine is avoided, and sundry sludge is prevented from entering the starting motor in the ploughing process.

Description

Mini-tiller starting mechanism and mini-tiller

Technical Field

The utility model relates to agricultural machinery, especially, relate to plough quick-witted and plough actuating mechanism a little.

Background

The mini-tiller uses a small diesel engine or a gasoline engine as power and has the characteristics of light weight, small volume, simple structure and the like. The micro-tillage machine is widely applicable to dry lands, paddy fields, orchards and the like in plains, mountainous areas and hills. The machine can be matched with corresponding machines to carry out operations such as water pumping, legal operation, pesticide spraying, land cultivation and the like. The mini-tiller can freely run in the field, is convenient to use and store, saves the trouble that large agricultural machinery cannot enter a mountain field, and is the best choice for vast farmers to replace cattle farming.

At present, the mini-tiller is usually started by a pull disc, a main shaft in a gearbox is driven to rotate by the pull disc, and then a diesel engine or a gasoline engine is driven to start by the main shaft. Or the pull disc is directly adopted to start the diesel engine or the gasoline engine, or a middle shaft is arranged between the pull disc and the diesel engine or the gasoline engine, and the diesel engine or the gasoline engine is started after the middle shaft is started through the pull disc. In addition, the existing scheme also adopts electric starting, and the diesel engine or the gasoline engine is directly driven by starting the motor, or the diesel engine or the gasoline engine is driven after the intermediate shaft is driven by the motor. In order to realize starting in the prior art, a starting pull disc or a starting motor is generally arranged on the same side of the mini-tiller, generally the front side of a gearbox. The problem of such an arrangement is that: the gravity center of the mini-tiller is too forward, the structure is too compact, the heat generated by the working of the gasoline engine or the oil extraction machine can be transferred to the starting motor or the pull disc, and impurities can be easily introduced into the pull disc or the starting motor in the working process.

Chinese patent CN104234830A discloses a rear-mounted start-up mini-tiller, and specifically discloses: the diesel engine power transmission device comprises a diesel engine, a gearbox assembly, an operating handle assembly, a rack and a travelling wheel, wherein the power of the diesel engine is transmitted to the travelling wheel after being subjected to variable-speed transmission through the gearbox assembly, so that the travelling wheel has the power required by travelling; the operating handle assembly is arranged above the gearbox, so that the required working frequency of the equipment can be adjusted in time; the diesel engine, the gearbox component and the travelling wheel are arranged on the frame, so that all the components are organically combined together; one end of a main shaft of the speed changing box assembly is connected with a crankshaft of a diesel engine, the other end of the main shaft of the speed changing box assembly is connected with a starter I through a clutch, the starter I is arranged at one end, opposite to the diesel engine, of the speed changing box assembly through the clutch, so that the starter I is not in contact with a heat dissipation hole of the diesel engine, a fully-closed design can be adopted, and starting faults caused by water or slurry entering the inside of the starter I are avoided, namely 8230308230, wherein the starter comprises a driving shaft, a transmission assembly, a one-way coupler, a volute spring and a casing, the transmission assembly comprises a driven gear and a gear column which are connected with a flat key of the driving shaft, the gear column comprises a cylinder which is connected with the casing through a shaft and a driving gear which is connected with the flat key of the cylinder, one end of the cylinder is connected with the casing, the other end of the cylinder extends out of the casing, and the driving gear is in transmission connection with the driven gear; the inner end of the scroll spring is fixed on the driving shaft, the outer end of the scroll spring is fixed on the shell, and the upward adjusting direction is opposite to the rotating direction of the main shaft during working; the one-way coupling comprises a direction limiting gear connected with a driving shaft flat key and a limit component arranged on the same plane with the direction limiting gear, the limit component comprises a limit clamp pin connected with the shell in a shaft mode, a limit column arranged on one side of the limit clamp pin facing the volute spring in the upward adjustment direction and a reset spring arranged on the same side of the limit column, one end of the limit clamp pin is connected with the shell in a shaft mode, the other end of the limit clamp pin is meshed with the direction limiting gear, the limit clamp pin abuts against the limit column under the pulling of the reset spring, a pull rope is arranged on the other side of the limit column, one end of the pull rope is fixedly connected with the limit clamp pin, and the other end of the pull rope extends out of the shell.

Although adopt in the above-mentioned patent to set up starter one in the one end of gearbox subassembly diesel engine dorsad, the starter of starter one for drawing the dish structure makes starter one start through being used for pulling the stay cord, to the user that often uses the machine of ploughing a little, needs great starting force, and is inconvenient to use. Meanwhile, the mini-tiller disclosed by the patent has a complex starter structure, and once impurities enter the mini-tiller, the starter fails and cannot work.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a start mechanism is ploughed to declining that start reliably and fault rate is low.

The purpose of the utility model is realized through the following technical scheme: the utility model provides a starting mechanism of machine is ploughed a little which characterized in that: the transmission main shaft is connected with an engine in a transmission mode, the other end of the transmission main shaft is connected with a starting motor in a transmission mode, and the starting motor is in transmission connection with the transmission main shaft through a speed reducing mechanism. By adopting the mode, the starting reliability and low fault performance of the mini-tiller can be realized.

In order to further realize reliable starting, the engine is in transmission connection with the transmission main shaft through a clutch.

In order to further reduce the failure rate, the transmission main shaft is longitudinally arranged, the engine is arranged at the front end of the transmission main shaft, and the starting motor is arranged at the rear end of the transmission main shaft.

Preferably, the reduction mechanism includes at least one pair of gear pairs. The utility model discloses in, reduction gears includes the one-way gear that sets up on starter motor's the output shaft, and with the driven gear that the transmission main shaft is connected, one-way gear with driven gear meshing transmission. Wherein, the one-way gear and the driven gear can be cylindrical gears or bevel gears and the like.

Furthermore, the clutch includes a housing in transmission connection with an output shaft of the engine, a friction plate assembly connected with the front end of the transmission main shaft and located in the housing, and a pressure plate sleeved on the transmission main shaft and acting on the friction plate assembly axially.

In order to further realize smooth starting, the automatic starting device further comprises a starting driving mechanism driven by the pressure plate, wherein the starting driving mechanism comprises a starting shifting fork shaft and a starting shifting fork arranged on the starting shifting fork shaft, the starting shifting fork acts on the end surface of the pressure plate, and one end of the starting shifting fork shaft is connected with a starting handle.

Preferably, the pressure disk is far away the one end of engine is provided with the sleeve that outwards stretches out, the sleeve outer wall is provided with the bearing the sleeve is kept away from be connected with the shifting fork piece on the transmission main shaft of engine one side the shifting fork piece is far away fixedly connected with jump ring on the transmission main shaft of engine one side, start the shifting fork and be in on the shifting fork piece. The outer wall of the shifting fork block is square, and two fork angles of the shifting fork are clamped on two side walls of the outer wall of the shifting fork block.

A mini-tiller comprises the starting mechanism, a gearbox body and a speed change mechanism, wherein the transmission main shaft and the speed change mechanism are arranged in the gearbox body.

Has the advantages that:

by adopting the starting mechanism of the mini-tiller, the starting of the mini-tiller can be easily realized, and the manual starting is not needed; secondly, the reliability of starting can be improved; thirdly, the engine and the starting motor are arranged in front and at the back, so that the reliability of the whole structure can be improved, and the space can be saved and the layout can be optimized; and fourthly, the starting motor is arranged at the rear part far away from the engine, so that the performance of the starting motor is prevented from being influenced due to the heat of the engine, and sundry sludge is prevented from entering the starting motor in the plowing process.

The utility model discloses in, the direction that advances when using the machine of ploughing a little is preceding, and the operation side is the back when using the machine of ploughing a little, and the fore-and-aft direction is vertical, and left and right directions is horizontal, and upper and lower direction is vertical.

Drawings

FIG. 1 is a first perspective view of a starting mechanism of the mini-tiller;

FIG. 2 is a second perspective view of a starting mechanism of the mini-tiller;

FIG. 3 is a rear view of the starting mechanism of the mini-tiller;

FIG. 4 is a cross-sectional view C-C of FIG. 3;

FIG. 5 is a first perspective view of a speed change mechanism of the mini-tiller;

FIG. 6 is a second isometric view of the transmission mechanism of the mini-tiller;

FIG. 7 is a partial enlarged view of the speed change mechanism of the mini-tiller;

FIG. 8 is a right side view of the transmission housing of the mini-tiller;

FIG. 9 is a rear view of the gearbox housing of the mini-tiller;

FIG. 10 is a cross-sectional view D-D of FIG. 9;

FIG. 11 is a first isometric view of a starter motor end cap;

fig. 12 is a second isometric view of a starter motor end cap;

FIG. 13 is a right side view of the mini-tiller gearbox (including the starting mechanism and the shifting mechanism);

FIG. 14 is a rear view of the mini-tiller gearbox (including the starting mechanism and the shifting mechanism);

figure 15 isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of figure 14.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, but the present invention is not limited to these embodiments, and any modifications or replacements within the basic spirit of the embodiments still fall within the scope of the present invention claimed in the claims.

Example (b): as shown in fig. 1-15, the present embodiment provides a mini-tiller, a starting mechanism of the mini-tiller, a speed change mechanism of the mini-tiller, and a gearbox of the mini-tiller.

1. Starting mechanism for mini-tiller

The starting mechanism of the mini-tiller in the embodiment is connected with the speed change mechanism. The starting mechanism in this embodiment comprises a transmission main shaft 1, which at the same time is the power input shaft, i.e. the main shaft, of the gear change mechanism. The transmission main shaft is located in a gearbox body of the speed change mechanism and supported on the gearbox body through a bearing, one end of the transmission main shaft is connected with a starting motor 2, and the other end of the transmission main shaft is connected with an engine (not shown in the figure). Wherein, the engine can be a diesel engine or a gasoline engine.

In this embodiment, the transmission main shaft is longitudinally arranged in the front and back direction, and the engine and the starting motor are respectively arranged at the front end and the back end of the transmission main shaft. The engine can be selectively arranged at the front end of the transmission main shaft, and the starting motor is arranged at the rear end of the transmission main shaft, or the engine can be selectively arranged at the rear end of the transmission main shaft, and the starting motor is arranged at the front end of the transmission main shaft. In the embodiment, the engine is selectively arranged at the front end of the transmission main shaft, and the starting motor is arranged at the rear end of the transmission main shaft.

The starting motor and the transmission main shaft can be directly connected through a coupler or connected through other transmission mechanisms. In this embodiment, the starting motor is in transmission connection with the transmission main shaft through a speed reducing mechanism. In this embodiment, the speed reduction mechanism is more than one pair of reduction gear pairs, which may be one pair, two pairs, three pairs or more. In this embodiment, a pair of reduction gear pairs is provided between the output shaft of the starter motor and the transmission main shaft. Specifically, the method comprises the following steps: a one-way gear 3 is arranged on an output shaft (not shown in the figure) of the starting motor, a driven gear 4 is arranged at the rear end of the transmission main shaft, and the power of the starting motor is transmitted to the transmission main shaft through the meshing of the one-way gear and the driven gear and is reduced.

It should be noted that: when the starting motor is not started, the one-way gear and the driven gear are in a normally separated state, and the one-way gear is located at the rear end of the driven gear. When the starting motor is started, the single gear moves forwards to be meshed with the driven gear and transmits power and torque to the driven gear, and the driven gear is in a passive state; then after the driven gear drives the engine to start, the engine directly drives the transmission main shaft to rotate, the driven gear is in a driving state relative to the one-way gear at the moment, the one-way gear loses the meshing force with the driven gear and returns to the rear of the driven gear, and then the starting motor is turned off. The structure of the one-way gear and the output shaft of the starter motor is the prior art and is not described herein again.

The one-way gear and the driven gear can be cylindrical gears which are matched with each other, and can also be bevel gears which are matched with each other. If the starting motor is arranged behind the transmission main shaft, the power of the starting motor can be transmitted to the transmission main shaft by adopting a cylindrical gear. If the starting motor is arranged on the left side, the right side, the upper side or the lower side behind the transmission main shaft, the bevel gear can be adopted to transmit the power of the starting motor to the transmission main shaft and realize the reversing of a transmission route. In the attached drawings of this embodiment, the one-way gear and the driven gear both adopt cylindrical gears, the starting motor is disposed behind the transmission main shaft, and an axis of an output shaft of the starting motor is parallel to an axis of the transmission main shaft.

In addition, the engine is in transmission connection with the front end of the transmission main shaft through a clutch 5. Through the clutch, the power connection and disconnection between the engine and the transmission main shaft can be realized. Specifically, the method comprises the following steps: the output shaft of the engine is in transmission connection with the housing of the clutch, and in this embodiment, the output shaft of the engine (not shown in the figure) can be connected with the inner wall of the shaft neck of the housing 51 of the clutch in an internal and external spline mode. The front end of the drive spindle may be supported by bearings against the inner wall of the housing of the clutch at the journal. The opening of the housing of the clutch faces the transmission main shaft. Friction disc subassembly 52 transmission of clutch is connected on the transmission main shaft and is located the casing of clutch, the clutch still including be located friction disc subassembly rear side and cup joint are in transmission main epaxial pressure disk 53. The driving mechanism 6 is started to drive the pressure plate to move axially, the pressure plate compresses the friction plate assembly, the transmission connection between the transmission main shaft and the output shaft of the engine is further realized, the transmission main shaft starts the engine, and the engine drives the transmission main shaft to rotate after being started. When the pressure plate of the clutch is not pressed on the friction plate assembly, the transmission main shaft and the engine output shaft are in a power separation state, and the engine cannot be started by the rotation of the transmission main shaft.

As an implementation manner in this embodiment, the start driving mechanism 6 includes a start shifting fork 61 and a start shifting fork shaft 62, the start shifting fork is fixedly sleeved on the start shifting fork shaft, the start shifting fork shaft is transversely arranged and one end of the start shifting fork shaft extends out of the gearbox casing, and one end of the start shifting fork shaft extending out of the gearbox casing is connected with a start handle 63.

As one of the implementation manners in this embodiment, the one end of the pressure plate, which is far away from the engine, is provided with a sleeve which extends outwards, the outer wall of the sleeve is provided with a bearing 54, the sleeve is far away from the transmission main shaft on one side of the engine, and a shifting fork block 64 is sleeved on the transmission main shaft on one side of the engine, and the shifting fork block is far away from the transmission main shaft on one side of the engine, and a clamp spring 65 is fixedly connected to the transmission main shaft. The outer wall of the shifting fork block is square, two fork angles of the starting shifting fork are clamped on two opposite outer side walls of the shifting fork block, the starting handle is rotated to drive the starting shifting fork to axially push a bearing arranged on the outer wall of a sleeve of the pressure plate, and then the pressure plate is pushed to compress the friction plate assembly, so that the transmission main shaft is in transmission connection with an output shaft of the engine. And the starting handle is rotated in the opposite direction, so that the friction plate assembly can be released from being pressed by the starting shifting fork, and further, the transmission connection between the output shaft of the engine and the transmission main shaft is released. In the present embodiment, the transmission connection refers to a connection between two shafts capable of transmitting power and torque.

By adopting the starting mechanism for the mini-tiller, before the mini-tiller is started, the transmission main shaft is in non-transmission connection with the output shaft of the engine, and the starting shifting fork does not push the pressure plate to compress the friction plate assembly. When the mini-tiller needs to be started: and rotating the starting handle (the step can be completed by operating a handle at the operation part of the mini-tiller) to enable a pressure plate of the clutch to press the friction plate assembly, so that the transmission main shaft is in transmission connection with the output shaft of the engine. And then starting a starting motor, wherein an output shaft of the starting motor rotates, the one-way gear moves forwards and is meshed with the driven gear to form a transmission and reduction mechanism, the transmission main shaft is driven to rotate through the reduction mechanism, the transmission main shaft drives the engine to start through the clutch, the transmission main shaft is directly driven to rotate through the engine after the engine is started, the one-way gear of the starting motor moves backwards and is separated from the driven gear, and the starting motor is turned off. Therefore, the mini-tiller is started, and the transmission main shaft transmits power and torque to the travelling mechanism and/or the tilling blade structure at the tail end through the speed change mechanism and the like.

By adopting the starting mechanism of the mini-tiller, the mini-tiller can be started easily without manual starting; secondly, the reliability of starting can be improved; thirdly, the engine and the starting motor are arranged in front and at the back, so that the reliability of the whole structure can be improved, and the space can be saved and the layout can be optimized; and fourthly, the starting motor is arranged at the rear part far away from the engine, so that the influence on the performance of the starting motor caused by the heat generated by the engine is avoided, and sundry sludge is prevented from entering the starting motor in the ploughing process.

2. Speed change mechanism of mini-tiller

The speed change mechanism in this embodiment can be started by using the starting mechanism in this embodiment, a transmission main shaft in the starting mechanism is used as a main shaft of the speed change mechanism in this embodiment, and the speed change mechanism further includes a counter shaft 7 and a reverse gear shaft 8 which are arranged in parallel with the transmission main shaft. In the present embodiment, two forward gears and one reverse gear are provided in common.

Specifically, the method comprises the following steps: the transmission main shaft is provided with main transmission duplex teeth 9 in transmission connection, and the main transmission duplex teeth can axially slide on the transmission main shaft through a variable speed driving mechanism. And a first main-gear driven gear 10 meshed and matched with a large gear 91 of the main-gear duplex gear and a second main-gear driven gear 11 meshed and matched with a small gear 92 of the main-gear duplex gear are arranged on the auxiliary shaft. The first main gear driven gear and the second main gear driven gear are both fixedly arranged on the auxiliary shaft. The first main speed change driving gear and the second main speed change driven gear can be two independent gears or can be a duplicate gear. In this embodiment, the first main-shift driven gear and the second main-shift driven gear are selected to be a duplicate gear fixedly mounted on the auxiliary shaft. In this embodiment, the main transmission duplex teeth are in transmission connection with the transmission main shaft through an internal spline and an external spline.

The reverse gear shaft is provided with an intermediate gear 12 and a reverse gear 13 which are fixedly connected with the reverse gear shaft, and the intermediate gear and the reverse gear can be two independent gears or a duplicate gear which is fixedly arranged on the reverse gear shaft. In this embodiment, it is selected that the intermediate gear and the reverse gear are independently mounted on the reverse shaft.

The intermediate gear can be meshed and matched with a large gear or a small gear of the main-transmission double-linkage gear, power and torque are obtained from the transmission main shaft, and then the reverse gear can be meshed and matched with a main-transmission driven gear II or a main-transmission driven gear I on the auxiliary shaft and transmits the power and the torque obtained by the reverse gear shaft to the auxiliary shaft to realize reverse rotation so as to realize reverse gear. In this embodiment, the reverse gear on the reverse gear shaft and the second main transmission driven gear on the countershaft are in a normally engaged state, and the large teeth of the main transmission duplicate gear are engaged and matched with the intermediate teeth through axial slippage and transmit power and torque to the reverse gear shaft and further to the countershaft to realize reverse gear.

The variable-speed driving mechanism drives the main variable-speed duplicate gear to axially slide on the transmission main shaft, and can respectively realize that: neutral gear: namely, a main gear duplex gear large gear and a pinion are not meshed and matched with any gear of a main gear driven gear I, a main gear driving gear II and an intermediate gear, namely, power and torque on the transmission main shaft cannot be transmitted to the auxiliary shaft and the reverse gear shaft, and the main gear duplex gear idles on the transmission main shaft and is suitable for starting a mini-tiller. High-speed gear: namely, a large gear of the main gear duplex gear is meshed with a main gear driven gear on the auxiliary shaft for transmission, and power and torque are transmitted to the auxiliary shaft from the transmission main shaft and are finally transmitted to a working part through the auxiliary shaft. Low-speed gear: the pinion of the main-gear duplex gear is meshed with a main-gear driven gear II on the auxiliary shaft for transmission, and power and torque are transmitted to the auxiliary shaft from the transmission main shaft and are finally transmitted to a working part through the auxiliary shaft. Reversing gear: the main gear of the main gear duplex gear is meshed with the intermediate gear on the reverse gear shaft for transmission, the reverse gear on the reverse gear shaft is meshed with the main gear driven gear on the auxiliary shaft for transmission, power and torque are transmitted to the reverse gear shaft from the transmission main shaft and then to the auxiliary shaft, and finally transmitted to the working part through the auxiliary shaft.

As one of the embodiments in this embodiment, the number of teeth of the intermediate gear is greater than the number of teeth of the large gear of the main-shift duplicate gear, and the number of teeth of the main-shift driven gear two is greater than the number of teeth of the reverse gear. Therefore, the rotation speed can be reduced during reverse gear, and accidental injury of a mini-tiller user is avoided.

As an embodiment of the present embodiment, the auxiliary shaft does not directly transmit power to the working member. The transmission mechanism further comprises an output shaft 14, which is arranged vertically and perpendicular to the secondary shaft, which is connected with the output shaft by means of bevel gears. Specifically, one end of the auxiliary shaft facing the center of the transmission main shaft is provided with a power output bevel gear 15, and the top end of the output shaft is provided with a power input bevel gear 16 in constant mesh transmission with the power input bevel gear. The tail end of the output shaft is connected with a working assembly.

The mini-tiller adopting the speed change mechanism in the embodiment is characterized in that the tail end of an output shaft of the speed change mechanism is connected with a walking shaft 17 of the walking device, the walking shaft is transversely arranged left and right, the tail end of the output shaft is in transmission connection with the middle of the walking shaft through a bevel gear pair, and two ends of the walking shaft are respectively connected with walking wheels. Specifically, the method comprises the following steps: an output bevel gear 18 is arranged at the tail end of the output shaft, and an input bevel gear 19 which is meshed with the output bevel gear is arranged in the middle of the walking shaft.

As one of the embodiments in this embodiment, the speed change driving mechanism 20 includes a speed change fork shaft 201 parallel to the transmission main shaft, a speed change fork 202 is axially slidably disposed on the speed change fork shaft, one end of the speed change fork acts on the main-speed dual gear, the other end of the speed change fork is connected to one end of an intermediate L-shaped rod 203, and the other end of the intermediate L-shaped rod extends out of the box of the speed change mechanism and is connected to a speed change driving handle 204. The middle L rod is rotated by rotating the variable speed driving handle (the step can be completed by an operating handle at the operating part of the mini-tiller), the variable speed shifting fork is driven to axially slide on the variable speed shifting fork shaft in the rotating process of the middle L rod, and the main variable speed dual gear is driven to axially slide on the transmission main shaft by the axial movement of the variable speed shifting fork, so that the conversion of neutral gear, high gear, low gear and reverse gear is finally realized.

As one of the embodiments in this embodiment, the shift fork may act on an intermediate sleeve of the main transmission double gear, or on a gearwheel or pinion of the main transmission double gear. In the embodiment, two fork legs of the speed change shifting fork are clamped on a gear of the main speed dual gear close to the center of the transmission main shaft.

As one of the implementation manners in this embodiment, four positioning ring grooves 205 are circumferentially arranged on the speed change fork shaft, positioning holes 206 are arranged on the speed change fork, the positioning holes are matched with the positioning ring grooves, the speed change driving mechanism further includes a spring and a positioning ball (not shown), the positioning ball is located in the positioning hole, one end of the spring is connected with the positioning ball, and the other end of the spring is fixed on a box body or a shaft or other parts. Through the cooperation of location ball, locating hole and location spout, can realize the location when shifting. If the gear shifting fork slides to a certain gear, the positioning hole on the gear shifting fork is just opposite to the positioning ring groove, and the positioning ball is clamped into the positioning ring groove under the action of the elastic force of the spring to realize positioning. In this way, the reliability of the gear shift is improved.

With the transmission mechanism of the present embodiment, neutral, high, low, and reverse gears are provided. When the transmission mechanism is started, the transmission mechanism is located in a neutral gear through the transmission driving mechanism, and the transmission main shaft is in transmission connection with the output shaft of the engine through the clutch by starting the driving mechanism. Then, starting a starting motor, enabling a one-way gear on an output shaft of the starting motor to move forwards axially and to be meshed with a driven gear fixedly connected with the rear end of a transmission main shaft for transmission and driving the transmission main shaft to rotate, further driving an engine to start through the transmission main shaft, driving the transmission main shaft to rotate by the engine after the engine is started, enabling the one-way gear to move backwards axially and to be separated from the driven gear, and stopping the starting motor to work, so that the start of the mini-tiller is completed. After the mini-tiller is started, the speed change mechanism of the mini-tiller is driven by the speed change driving mechanism to select a high speed gear, a low speed gear or a reverse gear according to the use requirements of users. The speed change mechanism in the embodiment has simple and reliable speed change mode and compact structure and reasonable layout in the gearbox. One side of the speed change mechanism in the embodiment is a starting motor, and the other side of the speed change mechanism is an engine, so that the reliability in starting can be improved.

3. Gearbox body of mini-tiller

The gearbox body of the mini-tiller in the embodiment comprises a main gearbox body 21 and a gearbox body 22, the gearbox body is arranged below the gearbox body, an inner cavity of the gearbox body is communicated with an inner cavity of the gearbox body, an engine end cover 23 used for being connected with an engine is arranged on one side of the main gearbox body, and a starting motor end cover 24 used for being connected with a starting motor is arranged on the other side of the main gearbox body. In this embodiment, the front end of the main transmission case is connected to the engine end cover, and the rear end of the main transmission case is connected to the motor end cover.

Wherein a speed reduction chamber is provided at the rear side of the main transmission case, in the starter motor end cover or between the main transmission case and the starter motor end cover. The speed reduction chamber is used for installing a speed reduction mechanism between an output shaft of the starting motor and a transmission main shaft of the speed change mechanism. The position of the speed reduction chamber is determined according to the installation position of the starting motor.

As one embodiment of the present embodiment, the starter motor end cover has a lower chamber shell 241 communicating with the rear end of the main transmission case and an upper chamber shell 242 located above the lower chamber shell, and the upper chamber and the lower chamber of the starter motor end cover communicate with each other in the up-down direction and form the speed reduction chamber. The lower chamber shell is provided with an opening at one side connected with the main transmission box body, and the upper chamber shell is provided with a mounting hole 243 at one side deviated from the main transmission box body as an opening and at the edge. The end face of the upper chamber shell is connected with a starting motor, an output shaft of the starting motor extends into the upper chamber, and the one-way gear on the output shaft of the motor moves forwards axially and is located in the upper chamber when being started. The rear end of a transmission main shaft of the speed change mechanism extends into a lower cavity of the lower cavity shell, and a driven gear connected with the rear end of the transmission main shaft is located in the lower cavity.

As one of the embodiments in this embodiment, a protruding mounting cavity housing 244 is provided on a side of the upper chamber housing facing the main transmission case, and the mounting cavity of the mounting cavity housing communicates with the upper chamber. The mounting chamber housing is tapered. With this arrangement, the mounting of the conical head of the starter motor on the starter motor end cap is facilitated.

As one of the embodiments in this embodiment, a transverse partition plate 25 is disposed at a lower portion of the inner cavity of the main transmission case, and divides the inner cavity of the main transmission case into a first chamber at a side close to the engine end cover and a second chamber at a side close to the motor end cover, and a hole is disposed at a bottom of the first chamber and is communicated with the inner cavity of the transmission case. The bottom of the second cavity is provided with an opening, the top of the transmission case body is provided with a connecting plate 26 extending towards one side of the motor end cover, and the connecting plate seals the bottom opening of the second cavity and is connected with the main transmission case body. As one of the embodiments in this embodiment, a reinforcing rib is provided between the bottom of the connecting plate and the housing of the transmission case.

The auxiliary shaft and the reverse shaft are both mounted between the rear side wall of the main gearbox body and the transverse partition plate through bearings, the rear end of the transmission main shaft is supported on the rear side wall of the main gearbox body through the bearings, the front end of the transmission main shaft is supported in the shell of the clutch through the bearings, and the outer wall of a front end journal of the clutch shell is supported on the end cover of the engine through the bearings. The output shaft is vertically supported in the transmission case through a bearing.

The lower part of the inner cavity of the transmission case body is provided with a reversing chamber 27, the left side and the right side of the reversing chamber are provided with transverse holes 28, and the walking shaft penetrates through the transverse holes and is installed in the transmission case body through a bearing. The bottom of the reversing chamber is open and the opening is connected with a transmission case bottom cover 29.

The mini-tiller provided in the embodiment comprises the starting mechanism, the speed change mechanism and/or the gearbox body.

Finally, the above examples are intended only to illustrate the technical solution of the present invention and not to limit it, and although the present invention has been described in detail with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention defined by the appended claims.

Claims (10)

1. The utility model provides a starting mechanism of machine is ploughed a little which characterized in that: the transmission main shaft is connected with an engine in a transmission mode, the other end of the transmission main shaft is connected with a starting motor in a transmission mode, and the starting motor is in transmission connection with the transmission main shaft through a speed reducing mechanism.

2. The starting mechanism of the micro-cultivator of claim 1, wherein: the transmission main shaft is longitudinally arranged, the engine is arranged at the front end of the transmission main shaft, and the starting motor is arranged at the rear end of the transmission main shaft.

3. The starting mechanism of the micro-cultivator of claim 1 or 2, wherein: the engine is in transmission connection with the transmission main shaft through a clutch.

4. The starting mechanism of the micro-cultivator of claim 3, wherein: the speed reduction mechanism includes at least one pair of gear pairs.

5. The starting mechanism of the micro-cultivator of claim 4, wherein: the speed reducing mechanism comprises a one-way gear arranged on an output shaft of the starting motor and a driven gear connected with the transmission main shaft, and the one-way gear is in meshing transmission with the driven gear.

6. The starting mechanism of the micro-cultivator of claim 4 or 5, wherein: the clutch comprises a shell in transmission connection with an output shaft of the engine, a friction plate assembly connected with the front end of the transmission main shaft and located in the shell, and a pressure plate sleeved on the transmission main shaft and axially acting on the friction plate assembly.

7. The starting mechanism of the micro-cultivator of claim 6, wherein: the automatic pressure plate pressing device is characterized by further comprising a starting driving mechanism driven by the axial direction of the pressure plate, the starting driving mechanism comprises a starting shifting fork shaft and a starting shifting fork arranged on the starting shifting fork shaft, the starting shifting fork acts on the end face of the pressure plate, and one end of the starting shifting fork shaft is connected with a starting handle.

8. The starting mechanism of the micro-cultivator of claim 7, wherein: the pressure disk keep away from the one end of engine is provided with the sleeve that stretches out outward, the bearing is installed to the sleeve outer wall the sleeve is kept away from be connected with the shifting fork piece on the transmission main shaft of engine one side the shifting fork piece is kept away from fixedly connected with jump ring on the transmission main shaft of engine one side, start to dial the card and be in on the shifting fork piece.

9. The starting mechanism of the micro-cultivator of claim 8, wherein: the shifting fork block is square.

10. A micro-cultivator is characterized in that: the starting mechanism comprises a gearbox body and a speed change mechanism, wherein the transmission main shaft and the speed change mechanism are arranged in the gearbox body.

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