CN115539579A

CN115539579A - Agricultural mechanical gear box

Info

Publication number: CN115539579A
Application number: CN202211318994.2A
Authority: CN
Inventors: 吕刚
Original assignee: Lianyungang Jinhe Casting Factory
Current assignee: Lianyungang Jinhe Casting Factory
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2022-12-30

Abstract

The invention relates to the technical field of agricultural machinery, in particular to an agricultural machinery gear box which comprises a box body, wherein a box cover is arranged at the upper end of the box body, a bottom plate is arranged at the lower end of the box body, a transmission mechanism is arranged in an inner cavity of the box body, two circular grooves are arranged on the outer side of the box body, an output shaft is arranged in one circular groove, a switching mechanism is arranged on the outer side of the output shaft, limiting mechanisms matched with the switching mechanism in position are symmetrically arranged on the outer side of the box body, and fastening assemblies are arranged in the inner cavities of the circular grooves.

Description

Agricultural mechanical gear box

Technical Field

The invention relates to the technical field of agricultural machinery, in particular to an agricultural machinery gear box.

Background

In agricultural machinery, a gear box is often connected to an engine for changing speed to enable working components to work at a proper output rotating speed, and the gear box belongs to one of mechanical transmission structures and consists of a linkage shaft and a plurality of gears.

The linkage shafts in the existing gearbox are driven by the rotation of the gears, the rotating speed can be changed correspondingly according to specific conditions, but when the gearbox is actually used, the specific rotating speed of the gearbox is generally limited during manufacturing, so that the gear cannot be changed, the using effect of the gearbox is influenced, the rotating speed cannot be changed according to the specific using condition, the using effect is poor, in the using process, a plurality of metal fragments can be generated due to meshing linkage between the gears, and then lubricating oil and old lubricating oil need to be added into the gearbox and replaced after a period of time, so that the lubricating treatment of the interior of the gearbox is carried out, the service life of the gearbox is prevented from being influenced.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides an agricultural mechanical gear box which has the advantages of rotating speed adjustment, convenience in quickly replacing lubricating oil, improvement of working efficiency, convenience in heat dissipation and cooling of the gear box and effective improvement of using effect.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an agricultural machinery gear box, includes the box, the upper end of box is provided with the case lid, the lower extreme of box is provided with the bottom plate, the inner chamber of box is provided with drive mechanism, the outside of box is provided with two circular slots, one of them circular slot inner chamber be provided with the output shaft, the outside of output shaft is provided with switching mechanism, the outside symmetry of box be provided with switching mechanism position assorted stop gear, the inner chamber of circular slot all is provided with fastening components, the output shaft is connected with one of them fastening components, fastening components all is connected with drive mechanism, the toper type guide plate is installed to the inner chamber of box, the lower extreme of toper type guide plate is provided with heat-conducting component.

Furthermore, the transmission mechanism comprises a transmission shaft, first bevel gears, speed change shafts, second bevel gears, third bevel gears and fourth bevel gears, one end of the transmission shaft penetrates through the box body and extends to the outer side, the first bevel gears are installed on the outer side of the transmission shaft, the two speed change shafts are movably arranged in an inner cavity of the box body, the outer side of one speed change shaft is sleeved with the second bevel gear and the third bevel gear, the second bevel gear is meshed with the first bevel gear, the outer side of the other speed change shaft is sleeved with the fourth bevel gear meshed with the third bevel gear, the gear ratio of the first bevel gear to the second bevel gear is 3:2, and the gear ratio of the third bevel gear to the fourth bevel gear is 3:1.

Furthermore, one side of transmission shaft is through first bearing frame and the inner chamber looks swing joint of box, two the one end of variable speed shaft all is through the inner chamber looks swing joint of second bearing frame and box, the outside of box is installed and is supported the cover with the second that the transmission shaft cup jointed mutually.

Further, fastening components is including adapter sleeve, jack and fixed orifices, the adapter sleeve all is located the inner chamber of circular slot, the both sides of adapter sleeve all are provided with the jack, the one end of variable speed axle all is rather than one of them jack fixed grafting, one side equidistance of adapter sleeve is provided with the fixed orifices, the equal joint in inner chamber of fixed orifices has the fixed column, the outside of fixed column is connected with the fixed disk jointly, the fixed disk cup joints in the outside of output shaft, the one end of output shaft is pegged graft with another jack activity, one side of fixed disk is connected with annular sliding sleeve, the inner chamber of circular slot all is provided with assorted ring channel with it.

Further, the switching mechanism includes casing, motor, lead screw, thread piece, connecting block, backup pad, spring, bearing, resistance subassembly, fixed cover and shifting chute, fixed cover sets up the upper end at the casing, the upper end at the casing is installed to the motor, the upper end of casing sets up the shifting chute, the motor passes through lead screw spiro union thread piece, the lower extreme of thread piece passes shifting chute and joint support board through the connecting block, the backup pad is located the inner chamber of casing, the inner chamber middle part of backup pad is provided with the bearing, the one end of output shaft runs through the casing and extends to the outside, the inboard and the output shaft looks fixed connection of bearing, the backup pad is connected with inner chamber one side of casing through the spring, the spring is located the outside of output shaft, the outside of casing is connected with the first supporting sleeve that cup joints mutually with the output shaft, control switch is installed in the outside of casing, one side of thread piece sets up the resistance subassembly.

Further, the resistance component is including connecting rod, piston cylinder, piston rod, pump, first connecting pipe, first solenoid valve, second connecting pipe and second solenoid valve, the connecting rod is connected with the thread piece, the piston cylinder is installed in the upper end of casing, the inner chamber of piston cylinder is connected with the connecting rod through the piston rod, one side of piston cylinder is connected the pump through first connecting pipe, the pump is installed in the upper end of casing, first solenoid valve is installed in the outside of first connecting pipe, the second connecting pipe is connected to the one end of piston cylinder, the second solenoid valve is installed in the outside of second connecting pipe.

Furthermore, the lower end of the inner cavity of the shell is symmetrically provided with sliding grooves, and the lower end of the supporting plate is symmetrically provided with sliding blocks which are in sliding connection with each other.

Further, stop gear is including curb plate, T type groove and T type piece, two one side at the box is installed to the curb plate, the corresponding one side of curb plate all sets up T type groove, the equal swing joint T type piece of inner chamber in T type groove, the corresponding one side of T type piece all is connected with switching mechanism.

Further, the heat conduction assembly is including silica gel layer, conducting strip and heating panel, the silica gel layer bonds at the lower extreme of tapered guide plate, the lower extreme equidistance on silica gel layer is provided with the conducting strip, the lower extreme of conducting strip is connected with the heating panel, conducting strip and heating panel are copper material and make, the lower extreme of heating panel is connected with the bottom plate, the impartial distance in lower extreme both sides of bottom plate is provided with the louvre.

Further, the lower extreme of tapered guide plate is connected with the oil extraction pipe, the bottom plate that runs through of oil extraction pipe just extends to its below spiro union has the screw cap, the upper end of case lid is provided with leads the hydraulic fluid port, the inner chamber of leading the hydraulic fluid port is provided with the sealing plug.

The agricultural mechanical gear box provided by the invention has the beneficial effects that:

1. after the fixing sleeve is connected with the two speed changing shafts through the insertion holes of the fastening sleeve, the speed changing shafts are conveniently driven to be linked with the output shaft, power transmission is facilitated, the output shaft is inserted into the fixing holes in the outer side of the fastening sleeve through the fixing columns in the outer side of the fixing disc, connection stability is effectively improved, power stable transmission is facilitated, the fixing disc is slidably sleeved in the inner cavity of the annular groove through the annular sliding sleeve, and installation stability of the output shaft is further improved;

2. the screw rod is driven to rotate by the motor, the thread block on the outer side of the screw rod drives the supporting plate to move forwards by the connecting block, the supporting plate compresses the spring, the supporting plate drives the output shaft of which the inner cavity is sleeved by the bearing to move forwards, the output shaft drives the fixing disc and the fixing column on the outer side of the fixing disc to be far away from the fixing hole on the outer side of the fastening sleeve, and then the fixing disc and the fixing column on the outer side of the fixing disc enter the inner cavity of the shell along with the output shaft, so that the shell can be conveniently moved integrally, different speed change shafts can be connected in a switching mode, and the use requirement of the rotation speed under the condition of no use can be conveniently met;

3. the interior of the piston cylinder is inflated through the inflator pump, the piston cylinder is kept in a closed state by closing the first electromagnetic valve, the pressure intensity of an inner cavity of the piston cylinder is increased conveniently, a piston rod of the inner cavity of the piston cylinder is connected with the threaded block through the connecting rod, the situation that the output shaft is pulled by external pulling force and the like to drive the supporting plate, the connecting block and the threaded block to move is avoided, resistance is effectively increased for random movement of the threaded block, a protection effect is effectively achieved, and the using effect is improved conveniently;

4. the heat on the conical guide plate made of the metal material is absorbed through the silica gel layer, the heat is dissipated after being transmitted to the heat dissipation plate through the heat conduction sheet, and the heat is discharged through the heat dissipation holes in the lower end of the bottom plate, so that the heat dissipation effect is effectively improved, and the temperature of the inner cavity of the box body is conveniently cooled;

5. open the screw cap, twist equipment such as external plastics kettle again, carry out old lubricating oil and load, and through opening the sealing plug, utilize external gas charging outfit to aerify to the box is inside, the equipment lubricating oil such as the lubricated screw thread plastics kettle of the internal chamber of box and tapered guide plate upper end of being convenient for receives the effect of pressure, discharge through the oil drain pipe, and collect by equipment such as external plastics kettle, be convenient for clear up old lubricating oil, and pour into new lubricating oil into again through leading the hydraulic fluid port, conveniently maintain and use.

Drawings

FIG. 1 is a schematic view of an overall three-dimensional structure of a gearbox of an agricultural machine according to the present invention;

FIG. 2 is a perspective view of a gear box of an agricultural machine according to the present invention;

FIG. 3 is a schematic perspective view of a transmission mechanism of an agricultural mechanical gearbox according to the present invention;

FIG. 4 is a schematic structural diagram of a box body of the gearbox of an agricultural machine according to the present invention;

FIG. 5 is a schematic perspective view of a switching mechanism and a limiting mechanism of an agricultural mechanical gearbox according to the present invention;

FIG. 6 is a schematic perspective view of a part of the switching mechanism of the gearbox of an agricultural machine according to the present invention;

FIG. 7 is a perspective view of a resistance assembly of a gearbox for an agricultural machine according to the present invention;

FIG. 8 is a schematic perspective view of a portion of a gearbox of an agricultural machine according to the present invention;

FIG. 9 is a schematic perspective view of a part of a gearbox of an agricultural machine according to the present invention;

FIG. 10 is a schematic view of a sectional three-dimensional structure of a gearbox of an agricultural machine according to the present invention;

fig. 11 is a schematic bottom view of a heat conducting assembly of a gearbox of an agricultural machine according to the present invention.

In the figure: the oil-gas separator comprises a box body 1, a box cover 2, a bottom plate 3, a transmission mechanism 4, a transmission shaft 41, a first bevel gear 42, a speed change shaft 43, a second bevel gear 44, a third bevel gear 45, a fourth bevel gear 46, a first bearing seat 47, a second bearing seat 48, a switching mechanism 5, a housing 51, a motor 52, a screw rod 53, a thread block 54, a connecting block 55, a supporting plate 56, a spring 57, a bearing 58, a resistance component 59, a connecting rod 591, a piston cylinder 592, a piston rod 593, an air pump 594, a first connecting pipe 595, a first electromagnetic valve 596, a second connecting pipe 597, a second electromagnetic valve 598, a fixed cover 510, a moving groove 511, a sliding groove 512, a sliding block 513, an output shaft 6, a limiting mechanism 7, a side plate 71, a T-shaped groove 72, a T-shaped block 73, a first supporting sleeve 8, a fastening component 9, a fastening sleeve 91, a jack 92, a fixing hole 93, a guide hole 10, a sealing plug 11, a control switch 12, a second supporting sleeve 13, an annular groove 14, a circular groove 15, a heat-conducting cone-shaped guide plate 16, a heat-conducting component 17, a heat-radiating hole 171, a heat-radiating plate 172, a radiating plate 173, a threaded cap 173, a fixing column 18, an oil-discharging cap 21, a fixing plate 22, and a fixing disc 22.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-11, an agricultural machinery gearbox comprises a box body 1, a box cover 2 is arranged at the upper end of the box body 1, a bottom plate 3 is arranged at the lower end of the box body 1, a transmission mechanism 4 is arranged in an inner cavity of the box body 1, the transmission mechanism 4 comprises a transmission shaft 41, a first bevel gear 42, transmission shafts 43, a second bevel gear 44, a third bevel gear 45 and a fourth bevel gear 46, one end of the transmission shaft 41 penetrates through the box body 1 and extends to the outside, the first bevel gear 42 is installed on the outside of the transmission shaft 41, two transmission shafts 43 are movably arranged in the inner cavity of the box body 1, the second bevel gear 44 and the third bevel gear 45 are sleeved on the outside of one transmission shaft 43, the second bevel gear 44 is meshed with the first bevel gear 42, the fourth bevel gear 46 meshed with the third bevel gear 45 is sleeved on the outside of the other transmission shaft 43, the gear ratio of the first bevel gear 42 to the second bevel gear 44 is 3:2, the gear ratio of the third bevel gear 45 and the fourth bevel gear 46 is 3:1, the third bevel gear 45 and the fourth bevel gear 46 are connected with an external driving device of agricultural machinery through a transmission shaft 41, power transmission is convenient to carry out, the transmission shaft 41 is meshed with the second bevel gear 44 through the first bevel gear 42, the second bevel gear 44 drives one of the speed change shafts 43 to rotate, the gear ratio of the first bevel gear 42 and the second bevel gear 44 is 3532, original power is further decelerated for one time, the speed change shafts 43 are used conveniently, the fourth bevel gear 46 drives the other speed change shaft 43 to rotate through the meshing of the third bevel gear 45, the gear ratio of the third bevel gear 45 and the fourth bevel gear 46 is 3:1, the rotating speed of the other speed change shaft 43 is further decelerated for two times, the transmission speeds of the two speed change shafts 43 are convenient to be different, the convenience is selected according to the in-service use condition and is used, the effectual practicality that has improved this gear box, the inner chamber looks swing joint of primary shaft bearing 47 and box 1 is passed through to one side of transmission shaft 41, the inner chamber looks swing joint of secondary shaft bearing 48 and box 1 is all passed through to the one end of two change speed axles 43, the second that cup joints with transmission shaft 41 is installed in the outside of box 1 supports cover 13, transmission shaft 41 and two change speed axles 43 carry out stable erection bracing through primary shaft bearing 47 and secondary shaft bearing 48 and box 1 respectively, it carries out stable power and carries to be convenient for, and the second that the outside of transmission shaft 41 cup jointed supports cover 13 further improvement the stable support to transmission shaft 41, be convenient for through the stability in use of this gear box.

The inner cavity of circular slot 15 all is provided with fastening assembly 9, fastening assembly 9 is including adapter sleeve 91, jack 92 and fixed orifices 93, adapter sleeve 91 all is located the inner cavity of circular slot 15, the both sides of adapter sleeve 91 all are provided with jack 92, the one end of variable speed axle 43 all is fixed grafting mutually with one of them jack 92, one side equidistance of adapter sleeve 91 is provided with fixed orifices 93, the equal joint of inner cavity of fixed orifices 93 has fixed column 23, the outside of fixed column 23 is connected with fixed disk 21 jointly, fixed disk 21 cup joints the outside at output shaft 6, the one end of output shaft 6 is pegged graft with another jack 92 activity, one side of fixed disk 21 is connected with annular sliding sleeve 22, the inner cavity of circular slot 15 all is provided with assorted ring channel 14 with it, after being connected with two variable speed axles 43 through the jack 92 of adapter sleeve 9, conveniently drive variable speed axle 43 and output shaft 6 and link, make things convenient for power transport, and output shaft 6 inserts in the fixed orifices 93 in the adapter sleeve 91 outside a plurality of fixed columns 23 through the fixed disk 21, the effectual stability that has improved the connection, make things convenient for stable transport of power, and the inner cavity slip of fixed disk 21 in ring channel 14, the further improved the stability of output shaft 6 installation.

The outer side of the box body 1 is provided with two circular grooves 15, an inner cavity of one circular groove 15 is provided with an output shaft 6, the outer side of the output shaft 6 is provided with a switching mechanism 5, the switching mechanism 5 comprises a shell 51, a motor 52, a screw rod 53, a thread block 54, a connecting block 55, a supporting plate 56, a spring 57, a bearing 58, a resistance component 59, a fixed cover 510 and a moving groove 511, the fixed cover 510 is arranged at the upper end of the shell 51, the motor 52 is arranged at the upper end of the shell 51, the moving groove 511 is arranged at the upper end of the shell 51, the motor 52 is in threaded connection with the thread block 54 through the screw rod 53, the lower end of the thread block 54 passes through the moving groove 511 through the connecting block 55 and is connected with the supporting plate 56, the supporting plate 56 is positioned in the inner cavity of the shell 51, the bearing 58 is arranged in the middle of the inner cavity of the supporting plate 56, one end of the output shaft 6 passes through the shell 51 and extends to the outer side, the inner side of the bearing 58 is fixedly connected with the output shaft 6, the supporting plate 56 is connected with one side of the inner cavity of the shell 51 through the spring 57, the spring 57 is located outside the output shaft 6, the outer side of the housing 51 is connected with the first support sleeve 8 which is sleeved with the output shaft 6, the outer side of the housing 51 is provided with the control switch 12, the lower end of the inner cavity of the housing 51 is symmetrically provided with sliding grooves 512, the lower end of the support plate 56 is symmetrically provided with sliding blocks 513 which are in sliding connection with each other, the motor 52 drives the screw rod 53 to rotate, then the thread block 54 outside the screw rod 53 drives the support plate 56 to move back and forth through the connecting block 55, and the support plate 56 slides stably in the sliding groove 512 at the lower end of the inner cavity of the housing 51 through the sliding blocks 513, so as to improve the moving stability of the support plate 56, further the spring 57 is compressed through the support plate 56, then the support plate 56 drives the output shaft 6 whose inner cavity is sleeved through the bearing 58 to move forward, and then the output shaft 6 drives the fixed plate 21 and the fixed column 23 outside thereof to be away from the fixed hole 93 outside the fastening sleeve 91, and then the output shaft 6 enters the inner cavity of the housing 51, which facilitates the overall movement of the housing 51, and further performs switching of connection with different speed changing shafts 43, and facilitates selection of connection between the output shaft 6 and two speed changing shafts 43 according to the actual rotating speed, a resistance component 59 is arranged on one side of the thread block 54, the resistance component 59 comprises a connecting rod 591, a piston cylinder 592, a piston rod 593, an inflator 594, a first connecting pipe 595, a first solenoid valve 596, a second connecting pipe 597 and a second solenoid valve 598, the connecting rod 591 is connected with the thread block 54, the piston cylinder 592 is mounted on the upper end of the housing 51, the inner cavity of the piston cylinder 592 is connected with the connecting rod 591 through the piston rod 593, one side of the piston cylinder 592 is connected with the inflator 594 through the first connecting pipe 595, the inflator 594 is mounted on the upper end of the housing 51, the first solenoid valve 596 is mounted on the outer side of the first connecting pipe 595, one end of the piston cylinder 592 is connected with a second connecting pipe 597, a second electromagnetic valve 598 is installed on the outer side of the second connecting pipe 597, the interior of the piston cylinder 592 is inflated through an inflator 594, the piston cylinder 592 is kept in a closed state by closing the first electromagnetic valve 596, so that the pressure of an inner cavity of the piston cylinder 592 is increased, a piston rod 593 of the inner cavity of the piston cylinder 592 is connected with the thread block 54 through a connecting rod 591, the situation that the output shaft 6 is pulled by external pulling force and the like to cause the output shaft 6 to drive the supporting plate 56, the connecting block 55 and the thread block 54 to move is avoided, resistance is effectively added to the random movement of the thread block 54, a protection effect is effectively achieved, the use effect is improved, when different speed change shafts 43 need to be connected in a switching manner, the switch of the second electromagnetic valve 598 is opened, so that gas in the inner cavity of the piston cylinder 592 can be discharged through the second connecting pipe 597, and the atmospheric pressure identical to the external atmosphere is restored, the convenient thread block 54 drives the piston rod 593 to flexibly extend and retract through the connecting rod 591, so that the output shaft 6 can easily move back and forth, and the use is convenient.

The limiting mechanisms 7 matched with the switching mechanism 5 in position are symmetrically arranged on the outer side of the box body 1, each limiting mechanism 7 comprises a side plate 71, a T-shaped groove 72 and a T-shaped block 73, the two side plates 71 are arranged on one side of the box body 1, the T-shaped grooves 72 are formed in one sides corresponding to the side plates 71, the inner cavities of the T-shaped grooves 72 are movably connected with the T-shaped blocks 73, one sides corresponding to the T-shaped blocks 73 are connected with the switching mechanism 5, the T-shaped blocks 73 are connected with the upper end of a fixing cover 510 of the switching mechanism 5 and the lower end of a shell 51, stable sliding of the inner cavities of the T-shaped grooves 72 of the T-shaped blocks 73 on the side plates 71 is facilitated, limiting support is facilitated for the switching mechanism 5, and the switching mechanism 5 is convenient to move.

The output shaft 6 is connected with one of the fastening assemblies 9, the fastening assemblies 9 are all connected with the transmission mechanism 4, the conical guide plate 16 is installed in the inner cavity of the box body 1, the heat conduction assembly 17 is arranged at the lower end of the conical guide plate 16, the heat conduction assembly 17 comprises a silica gel layer 171, heat conduction sheets 172 and a heat dissipation plate 173, the silica gel layer 171 is bonded at the lower end of the conical guide plate 16, the heat conduction sheets 172 are equidistantly arranged at the lower end of the silica gel layer 171, the heat dissipation plate 173 is connected with the lower end of the heat dissipation plate 172, the heat dissipation holes 18 are equidistantly arranged on two sides of the lower end of the bottom plate 3, when the gear box is continuously operated due to a plurality of gears, a large amount of heat can be generated, lubricating oil in the inner cavity of the box body 1 is also in a hotter state, heat on the conical guide plate 16 made of a metal material is absorbed through the silica gel layer 171, heat dissipation is transmitted to the heat dissipation plate 173 through the heat conduction sheets 172, heat dissipation is conducted, and is discharged through the heat dissipation holes 18 in the lower end of the bottom plate 3, the heat dissipation effect is effectively improved, and the temperature of the inner cavity of the box body 1 is conveniently processed and cooled.

The lower extreme of toper type guide plate 16 is connected with oil drain pipe 19, oil drain pipe 19 run through bottom plate 3 and extend to its below spiro union have screw cap 20, the upper end of case lid 2 is provided with leads hydraulic fluid port 10, the inner chamber of leading hydraulic fluid port 10 is provided with sealing plug 11, open screw cap 20, equipment such as external plastic kettle is twisted on again, carry out old lubricating oil and load, and through opening sealing plug 11, utilize external air charging outfit to aerify to box 1 inside, the lubricating oil of equipment such as the lubricating screw plastic kettle of box 1 inner chamber and the toper type guide plate 16 upper end of being convenient for receives the effect of pressure, discharge through oil drain pipe 19, and collect by equipment such as external plastic kettle, be convenient for clear up old lubricating oil, and pour into new lubricating oil into again through leading hydraulic fluid port 10, conveniently maintain the use.

The working principle is as follows: the invention connects the motor 52, the inflator 594, the first electromagnetic valve 596, the second electromagnetic valve 598 through the control switch 12, and the control switch 12 connects the battery device on the agricultural machinery, when in use, the transmission shaft 41 connects the external driving device of the agricultural machinery through the transmission shaft 41, which facilitates the power transmission, and the transmission shaft 41 connects the second bevel gear 44 through the first bevel gear 42, and the second bevel gear 44 drives one of the speed changing shafts 43 to rotate, and because the gear ratio of the first bevel gear 42 and the second bevel gear 44 is 3:2, the original power is decelerated once, which facilitates the use, and the speed changing shaft 43 connects the fourth bevel gear 46 through the third bevel gear 45, and the fourth bevel gear 46 drives the other speed changing shaft 43 to rotate, and the gear ratio of the third bevel gear 45 and the fourth bevel gear 46 is 3:1, the rotating speed of the other variable-speed shaft 43 is decelerated for the second time, so that the two variable-speed shafts 43 are convenient to transmit at different speeds and can be conveniently selected to use according to actual use conditions, the practicability of the gearbox is effectively improved, the variable-speed shafts 43 and the output shaft 6 are conveniently driven to be linked after being connected with the two variable-speed shafts 43 through the insertion holes 92 of the fastening sleeve 9, power transmission is convenient, the output shaft 6 is inserted into the fixing holes 93 in the outer side of the fastening sleeve 91 through the fixing columns 23 in the outer side of the fixing disc 21, the connection stability is effectively improved, the power stable transmission is convenient, the fixing disc 21 slides and rotates in the inner cavity of the annular groove 14 through the annular sliding sleeve 22, the installation stability of the output shaft 6 is further improved, when the rotating speed needs to be changed, the motor 52 drives the screw rod 53 to rotate after the motor 52 is opened, and further the thread block 54 in the outer side of the screw rod 53 drives the supporting plate 56 to move forwards through the connecting block 55, the supporting plate 56 slides stably in the sliding groove 512 at the lower end of the inner cavity of the housing 51 through the sliding block 513, so as to improve the moving stability of the supporting plate 56, further the supporting plate 56 compresses the spring 57, further the supporting plate 56 drives the output shaft 6 sleeved by the bearing 58 to move forward, further the output shaft 6 drives the fixed disc 21 and the fixed column 23 at the outer side of the fixed disc 21 to be away from the fixed hole 93 at the outer side of the fastening sleeve 91, further the output shaft 6 enters the inner cavity of the housing 51, so that the housing 51 can move integrally, further different transmission shafts 43 can be connected for switching, the connection between the output shaft 6 and the two transmission shafts 43 can be selected according to the actual rotating speed use requirement, the upper end of the fixed cover 510 of the switching mechanism 5 and the lower end of the housing 51 are connected with the T-shaped block 73, so that the inner cavity of the T-shaped block 73 on the side plate 71 can slide stably, and the switching mechanism 5 can be supported in a limiting manner, the switching mechanism 5 is convenient to move, the interior of the piston cylinder 592 is inflated by the inflator 594, the piston cylinder 592 is kept in a closed state by closing the first electromagnetic valve 596, the pressure intensity of an inner cavity of the piston cylinder 592 is increased, the piston rod 593 of the inner cavity of the piston cylinder 592 is connected with the thread block 54 through the connecting rod 591, and therefore the situation that the output shaft 6 is pulled by external pulling force and the like to drive the supporting plate 56, the connecting block 55 and the thread block 54 to move is avoided, resistance is effectively increased for random movement of the thread block 54, a protection effect is effectively achieved, the use effect is improved, when different speed change shafts 43 need to be switched and connected, a switch of the second electromagnetic valve 598 is opened, further, gas in the inner cavity of the piston cylinder 592 can be discharged through the second connecting pipe 597, the same atmospheric pressure intensity as the external environment is recovered, and the thread block 54 can conveniently drive the piston rod 593 to flexibly extend and retract through the connecting rod 591, make things convenient for the light back-and-forth movement that carries on of output shaft 6, convenient to use, and after the gear box is inside because the continuous operation of a plurality of gears, can produce a large amount of heat, and the lubricating oil of box 1 inner chamber is also under hotter state, and absorb the heat on the tapered guide plate 16 that metal material made through silica gel layer 171, and give the heat dissipation after heat dissipation plate 173 is given through conducting strip 172 to the transmission, and discharge the heat through louvre 18 of bottom plate 3 lower extreme, the effectual radiating effect that has improved, be convenient for cool down the processing to the temperature of box 1 inner chamber, and when needing to change lubricating oil, open screw cap 20, equipment such as external plastic kettle is twisted on again, carry out old lubricating oil loading, and through opening sealing plug 11, utilize external inflation equipment to aerify to box 1 inside, the lubricating oil of equipment such as lubricated screw thread plastic kettle of box 1 inner chamber and tapered guide plate 16 upper end receives the effect of pressure, discharge through oil drain pipe 19, and be collected by equipment such as external plastic kettle, be convenient for clearance old lubricating oil, and pour into new lubricating oil into through leading 10 hydraulic fluid port again, conveniently carry out the use.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides an agricultural machinery gear box, includes box (1), its characterized in that, the upper end of box (1) is provided with case lid (2), the lower extreme of box (1) is provided with bottom plate (3), the inner chamber of box (1) is provided with drive mechanism (4), the outside of box (1) is provided with two circular slots (15), one of them circular slot (15) inner chamber be provided with output shaft (6), the outside of output shaft (6) is provided with switching mechanism (5), the outside symmetry of box (1) be provided with switching mechanism (5) position assorted stop gear (7), the inner chamber of circular slot (15) all is provided with fastening components (9), output shaft (6) are connected with one of them fastening components (9), fastening components (9) all are connected with drive mechanism (4), conical guide plate (16) are installed to the inner chamber of box (1), the lower extreme of conical guide plate (16) is provided with heat-conducting component (17).

2. The agricultural mechanical gearbox as claimed in claim 1, wherein the transmission mechanism (4) comprises a transmission shaft (41), a first bevel gear (42), a transmission shaft (43), a second bevel gear (44), a third bevel gear (45) and a fourth bevel gear (46), one end of the transmission shaft (41) penetrates through the box body (1) and extends to the outside, the first bevel gear (42) is mounted on the outside of the transmission shaft (41), the two transmission shafts (43) are movably arranged in the inner cavity of the box body (1), the second bevel gear (44) and the third bevel gear (45) are sleeved on the outside of one transmission shaft (43), the second bevel gear (44) is meshed with the first bevel gear (42), the fourth bevel gear (46) is sleeved on the outside of the other transmission shaft (43) and is meshed with the third bevel gear (45), the gear ratio of the first bevel gear (42) to the second bevel gear (44) is 3:2, and the gear ratio of the third bevel gear (45) to the fourth bevel gear (46) is 3262 xzft 62.

3. An agricultural mechanical gearbox according to claim 2, characterized in that one side of the transmission shaft (41) is movably connected with the inner cavity of the box body (1) through a first bearing seat (47), one end of each of the two speed change shafts (43) is movably connected with the inner cavity of the box body (1) through a second bearing seat (48), and a second support sleeve (13) sleeved with the transmission shaft 41 is installed on the outer side of the box body (1).

4. The agricultural mechanical gear box according to claim 2, wherein the fastening assembly (9) comprises fastening sleeves (91), insertion holes (92) and fixing holes (93), the fastening sleeves (91) are located in inner cavities of circular grooves (15), the insertion holes (92) are formed in two sides of each fastening sleeve (91), one end of the speed changing shaft (43) is fixedly inserted into one of the insertion holes (92), the fixing holes (93) are formed in one side of each fastening sleeve (91) at equal intervals, fixing columns (23) are clamped in the inner cavities of the fixing holes (93), the outer sides of the fixing columns (23) are connected with the fixing disc (21) together, the fixing disc (21) is sleeved on the outer side of the output shaft (6), one end of the output shaft (6) is movably inserted into the other insertion hole (92), one side of the fixing disc (21) is connected with an annular sliding sleeve (22), and the inner cavities of the circular grooves (15) are provided with annular grooves (14) matched with the inner cavities.

5. The agricultural mechanical gearbox as claimed in claim 1, wherein the switching mechanism (5) comprises a housing (51), a motor (52), a lead screw (53), a threaded block (54), a connecting block (55), a supporting plate (56), a spring (57), a bearing (58), a resistance assembly (59), a fixed cover (510) and a moving groove (511), the fixed cover (510) is arranged at the upper end of the housing (51), the motor (52) is arranged at the upper end of the housing (51), the upper end of the housing (51) is provided with the moving groove (511), the motor (52) is in threaded connection with the threaded block (54) through the lead screw (53), the lower end of the threaded block (54) passes through the moving groove (511) through the connecting block (55) and is connected with the supporting plate (56), the supporting plate (56) is positioned in an inner cavity of the housing (51), the bearing (58) is arranged in the middle of the inner cavity of the supporting plate (56), one end of the output shaft (6) penetrates through the housing (51) and extends to the outside, the inner side of the output shaft (56) is fixedly connected with the output shaft (51) through the spring (57), the outer side of the shell (51) is connected with a first supporting sleeve (8) which is sleeved with the output shaft (6), the outer side of the shell (51) is provided with a control switch (12), and one side of the thread block (54) is provided with a resistance component (59).

6. The gearbox of the agricultural machinery, as set forth in claim 5, characterized in that the resistance assembly (59) comprises a connecting rod (591), a piston cylinder (592), a piston rod (593), an inflator (594), a first connecting pipe (595), a first solenoid valve (596), a second connecting pipe (597) and a second solenoid valve (598), the connecting rod (591) is connected with a thread block (54), the piston cylinder (592) is installed at the upper end of the housing (51), the inner cavity of the piston cylinder (592) is connected with the connecting rod (591) through the piston rod (593), one side of the piston cylinder (592) is connected with the inflator (592) through the first connecting pipe (595), the inflator (594) is installed at the upper end of the housing (51), the first solenoid valve (596) is installed at the outer side of the first connecting pipe (595), one end of the piston cylinder (592) is connected with the second connecting pipe (597), and the second solenoid valve (598) is installed at the outer side of the second connecting pipe (597).

7. An agricultural machinery gearbox according to claim 5, characterized in that the lower end of the inner cavity of the housing (51) is symmetrically provided with sliding grooves (512), and the lower end of the supporting plate (56) is symmetrically provided with sliding blocks (513) which are in sliding contact with each other.

8. An agricultural mechanical gear box according to claim 1, characterized in that the limiting mechanism (7) comprises side plates (71), T-shaped grooves (72) and T-shaped blocks (73), the two side plates (71) are installed on one side of the box body (1), the T-shaped grooves (72) are arranged on the corresponding sides of the side plates (71), inner cavities of the T-shaped grooves (72) are movably connected with the T-shaped blocks (73), and the corresponding sides of the T-shaped blocks (73) are connected with the switching mechanism (5).

9. The agricultural machinery gearbox of claim 1, wherein the heat conducting assembly (17) comprises a silica gel layer (171), heat conducting fins (172) and a heat dissipating plate (173), the silica gel layer (171) is bonded at the lower end of the conical flow guide plate (16), the heat conducting fins (172) are arranged at the lower end of the silica gel layer (171) at equal intervals, the heat dissipating plate (173) is connected to the lower end of the heat conducting fins (172), the heat conducting fins (172) and the heat dissipating plate (173) are made of copper materials, the lower end of the heat dissipating plate (173) is connected with the bottom plate (3), and heat dissipating holes (18) are arranged at both sides of the lower end of the bottom plate (3) at equal intervals.

10. The agricultural machinery gearbox as claimed in claim 1, wherein an oil discharge pipe (19) is connected to the lower end of the conical guide plate (16), the oil discharge pipe (19) penetrates through the bottom plate (3) and extends to the lower portion of the bottom plate to be screwed with a threaded cap (20), an oil guide opening (10) is formed in the upper end of the box cover (2), and a sealing plug (11) is arranged in the inner cavity of the oil guide opening (10).