CN113323994B

CN113323994B - Marine gear box

Info

Publication number: CN113323994B
Application number: CN202110614641.6A
Authority: CN
Inventors: 李晓富; 王强; 孙雁梁; 刘聪; 陶守勤; 徐可; 金淑芸; 江增辉
Original assignee: Hangzhou Advance Gearbox Group Co Ltd
Current assignee: Hangzhou Advance Gearbox Group Co Ltd
Priority date: 2021-06-02
Filing date: 2021-06-02
Publication date: 2024-03-08
Anticipated expiration: 2041-06-02
Also published as: CN113323994A

Abstract

The invention relates to a marine gearbox, which comprises a shell, an input shaft part, a transmission shaft part, an output shaft assembly and a control system part, wherein a clutch shell and a right-handed transmission gear are integrally formed, a clutch seat is welded at one end of a driving gear assembly through electron beams, a coupling and the right-handed transmission gear are also in transmission through keys, and a driven gear on the output shaft part is in meshed transmission with the driving gear assembly on the input shaft or a first transmission gear assembly on the transmission shaft part; the control system component comprises a hydraulic controller, an oil distributor seat, a lubricating valve and a double-cylinder oil filter, wherein the hydraulic controller, the oil distributor seat and the lubricating valve are respectively fixed on the oil distributor seat and are communicated with corresponding oil holes; the invention makes the whole volume of the gear box more compact. According to the invention, all functional parts of the control system component are integrated and modularized, so that excessive parts are reduced, the pipeline connection is reduced, and the ship-shaped design requirement can be better met.

Description

Marine gear box

Technical Field

The invention relates to the technical field of ship power transmission devices, in particular to a marine gearbox.

Background

The prior art marine gearbox generally has two structural types of external support and internal support, and the driving gear of the marine gearbox with the traditional external support structure is generally supported on the box body by adopting two bearings, so that the axial dimension is relatively large, and the driving gear is difficult to assemble, disassemble and maintain. The traditional marine gearbox driving gear with the internal support structure and the clutch seat adopt an integrated structure, the friction plate is smaller, the transmission power is limited, and because the driving gear is generally required to be sleeved on the input shaft or the transmission shaft through a needle bearing or a sliding shaft sleeve, the axial force in the gear work is required to be borne by a thrust needle or a thrust sliding bearing, the structure is complex, and a plurality of wearing parts are arranged.

Moreover, the marine gearbox can keep full load to work for a long time under rated power in the normal use process, and the gearbox which is generally designed is fixed at the end part of an input shaft through an input shaft coupling, and the input shaft is provided with a transmission gear, a driving gear, a clutch and the like. The power entering the input shaft coupling is transmitted by the input shaft through the transmission gear or the driving gear, the clutch and the like. This makes it necessary for the input shaft to withstand the driving torque from the diesel engine, and the input shaft cannot be made small to reduce the weight of the gear box.

In addition, the marine high-speed gear box adopts a hydraulic system to provide lubricating oil for the gear box, and realizes the functions of outputting forward, reverse and disengagement (neutral gear) of the gear box by controlling the forward and reverse clutches. The hydraulic system of the small marine high-speed gear box is generally composed of an oil suction filter, a gear pump, a water cooler, an oil filter, a control valve group and the like, wherein all parts are independent and dispersed parts and are arranged at different positions of the gear box, and then a plurality of oil pipes are connected with each other, so that the gear box is very troublesome to manufacture and install, especially, a user needs to mount the alarming gear box, the plurality of oil pipes are irregularly distributed outside the gear box, the oil is easy to damage and leak, the appearance is more attractive, the effect of regulating and controlling the lubricating oil pressure by the lubricating pressure valve which is dispersedly arranged at present is poor, the lubricating oil pressure is extremely easy to be too low to alarm when the lubricating oil pressure is low, the pressure is over-range when the lubricating oil pressure is high, and great trouble and loss are brought to the use.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a marine gearbox which is compact in structure, large in transmission torque and high in integration level of control system components.

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

the marine gearbox comprises a shell, an input shaft part, a transmission shaft part, an output shaft part and a control system part, wherein the input shaft part, the transmission shaft part and the output shaft part are all arranged in the shell through bearings and are in gear transmission, the input shaft part is also connected with a high-elastic coupler or a rubber tooth-shaped sleeve coupler, the control system part is arranged on the shell, the input shaft part comprises an input shaft, and a coupler, a right-handed transmission gear, a clutch assembly and a driving gear assembly which are sequentially arranged on the input shaft, the coupler is in interference connection with the conical surface of the input shaft, the right-handed transmission gear is in thermal sleeve connection with the input shaft,

the clutch assembly comprises a clutch shell, a clutch seat, a piston, a spring supporting plate, a first friction plate, a second friction plate and a bearing plate,

the clutch housing is arranged at one end of the right-hand transmission gear, is integrally formed with the right-hand transmission gear, the clutch seat is welded at one end of the driving gear assembly through an electron beam, the first friction plate and the second friction plate are respectively connected with an external spline on the clutch seat and a clutch housing spline on the right-hand transmission gear, and the first friction plate and the second friction plate are alternately arranged; the piston is arranged in the inner cavity of the right-handed transmission gear, the spring supporting plate is fixed on the input shaft, and the spring is arranged between the piston and the spring supporting plate; the bearing plate is fixed at one end of the clutch seat or the clutch housing, which is far away from the piston,

the clutch seat at one end of the driving gear assembly is supported on the input shaft through a second tapered roller bearing, and the other end of the driving gear assembly is supported on the box body through a third tapered roller bearing; the clutch seat and the third tapered roller bearing are respectively positioned at two ends of a driving tooth part of the driving gear assembly;

the coupling comprises a coupling body, an end face key is convexly arranged on the end face of one end of the coupling body, the right-hand transmission gear comprises a right-hand transmission gear main body, and a key slot for inserting the end face key is formed in the right-hand transmission gear main body;

the transmission shaft component comprises a transmission shaft, and a first transmission gear assembly, a clutch assembly and a second transmission gear assembly which are sequentially arranged on the transmission shaft, wherein one end of the first transmission gear assembly is supported on the transmission shaft through a bearing, the other end of the first transmission gear assembly is supported on the box body through a bearing, the second transmission gear assembly is in hot sleeve connection with the transmission shaft, the first transmission gear assembly is meshed with a right-handed transmission gear for transmission, and the first transmission gear assembly and the second transmission gear assembly are enabled to synchronously rotate or respectively rotate through the clutch assembly;

the output shaft part comprises an output shaft and a driven gear which is thermally sleeved on the output shaft, one end of the output shaft is supported on the box body through a fourth tapered roller bearing, and the other end of the output shaft is supported on the box body through a second tapered roller bearing; the driven gear is meshed with the driving gear assembly or the first transmission gear assembly for transmission;

the control system component comprises a hydraulic controller, an oil distributor seat, a lubricating valve and a double-cylinder oil filter, wherein the oil distributor seat is fixed at the top of the box body, a plurality of oil holes communicated with the box body are formed in the oil distributor seat, and the hydraulic controller, the oil distributor seat and the lubricating valve are respectively fixed on the oil distributor seat and are communicated with the corresponding oil holes;

the bottom in the box body is also provided with an oil baffle disc, the lower part outside the box body is provided with a filter screen assembly, the filter screen assembly is communicated with the box body, an oil pump is fixed on the rear cover of the input shaft through an oil pump connecting plate, one end of the input shaft is also provided with an oil pump transmission sleeve, the oil pump shaft is connected with the end part of the input shaft through the oil pump transmission sleeve, one side of the box body is also provided with a cooler through a connecting plate, the oil pump is connected with the filter screen assembly through an oil suction pipe assembly, the oil pump is connected with a cooler oil inlet on the cooler through an oil outlet pipe assembly, and the cooler is connected to the double-cylinder oil filter through a pipeline; the engine oil from the oil pump enters the hydraulic control component through the double-cylinder oil filter after passing through the cooler, and is guided into each working position after being regulated and distributed by the hydraulic control component.

As a preferable scheme: the hydraulic oil distributor is characterized in that an oil injection port is further formed in the box body, the corresponding oil hole of the hydraulic controller is connected to the oil injection port in the box body, an alarm is further arranged at the top of the box body through an alarm mounting plate, and the corresponding oil hole of the oil distributor seat is connected with the alarm.

As a preferable scheme: the one end of box is equipped with the input shaft protecgulum, the input shaft passes the input shaft protecgulum, and still is equipped with the sealing washer between input shaft and the input shaft protecgulum, right-hand transmission gear on the input shaft supports on the box through first tapered roller bearing, the other end of box still is equipped with the input shaft back lid, the other end of input shaft is covered behind the input shaft through first cylindrical roller bearing support.

As a preferable scheme: the rear cover of the input shaft is also provided with a second oil inlet, and one end of the second oil inlet is communicated with the working oil way and the lubricating oil way; the other end is communicated with a control system component, a working oil way is communicated with an oil cylinder of the clutch, and a lubricating oil way is connected to each bearing on the input shaft component.

As a preferable scheme: the front end of the box body is also provided with a transmission shaft front cover, the rear end of the box body is also provided with a transmission shaft rear cover, a second transmission gear assembly at one end of the transmission shaft is supported on the box body through a bearing, and the other end of the transmission shaft is supported on the transmission shaft rear cover through a bearing.

As a preferable scheme: still be equipped with the oil distribution bush between lid behind the transmission shaft and the transmission shaft, the inside of transmission shaft still is equipped with working oil circuit and lubricating oil circuit, and working oil circuit and lubricating oil circuit all with divide oil distribution bush intercommunication, cover behind the transmission shaft and still be equipped with first oil inlet, the one end and the oil distribution bush intercommunication of first oil inlet, the oil circuit intercommunication to control system part of the other end through the box, working oil circuit intercommunication to the hydro-cylinder of clutch, lubricating oil circuit is connected to each bearing department on the transmission shaft part, still is equipped with O type circle between first oil inlet and the box.

As a preferable scheme: the other end of the output shaft is provided with an output flange, the output shaft and the output flange are integrally formed, the two ends of the box body, which are positioned at the output shaft, are respectively provided with an output shaft front cover and an output sealing cover, the output sealing covers comprise a first bisection sealing cover and a second bisection sealing cover which are mutually spliced along the radial direction, the splicing surfaces of the first bisection sealing cover and the second bisection sealing cover are respectively provided with a connecting part, and the first bisection sealing cover and the second bisection sealing cover are fastened through bolts or pins arranged in the connecting parts.

As a preferable scheme: the output shaft penetrates out of the output sealing cover, an opening oil seal is further arranged between the output shaft and the output sealing cover, a baffle is fixed on the inner side of the output sealing cover, a pressing plate is fixed on the outer side of the output sealing cover, and the baffle and the pressing plate clamp the opening oil seal.

As a preferable scheme: the opening oil seal is provided with a notch, the opening oil seal comprises a framework, an oil seal body and V-shaped rings, the framework and the V-shaped rings are respectively embedded on two sides of the oil seal body, and the framework is located on the outer ring of the V-shaped rings.

As a preferable scheme: the box is further provided with a top cover plate, the bearing plate is provided with an emergency bolt used as an emergency device, and the bolt is located below the top cover plate.

Compared with the prior art, the invention has the beneficial effects that:

the clutch seat is welded on the driving gear component in an electron beam welding mode, so that the connecting strength is high, the welding line is smaller, and the whole length of the driving gear component is shortened; according to the invention, the shaft coupling is in interference connection with the conical surface of the input shaft, the right-hand transmission gear is in thermal sleeve connection with the input shaft, and torque transmission is further carried out between the shaft coupling and the right-hand transmission gear in a way of an end face key and a key groove, so that the combination length of the shaft coupling and/or the right-hand transmission gear and the input shaft is reduced, meanwhile, slipping does not occur, the length of the input shaft is further reduced, and the whole size of the gear box is reduced.

In addition, the invention integrates and modularizes all functional parts of the control system component, reduces excessive parts, reduces pipeline connection and can better meet the ship-shaped design requirement. The device has the characteristics of compact structural arrangement, attractive appearance, high working and maintenance reliability, suitability for long-term working at high rotating speed and the like.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not limit the application.

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a schematic cross-sectional view of a housing according to the present invention;

FIG. 4 is a schematic diagram of the hydraulic control of the present invention;

FIGS. 5-7 are schematic views of the mounting structure of the end face, side face, top face and control system components, oil pump, and cooler components of the present invention, respectively;

FIG. 8 is a schematic view of the overall structure of the output shaft member of the present invention;

FIG. 9 is a schematic view of the overall structure of the input shaft member of the present invention;

FIG. 10 is a schematic view of the right-hand gear assembly of the present invention;

FIG. 11 is a cross-sectional view A-A of FIG. 10;

FIG. 12 is a schematic view of the structure of the coupling of the present invention;

FIG. 13 is a B-B cross-sectional view of FIG. 12;

FIG. 14 is a schematic view of the structure of the housing of the present invention;

FIGS. 15 and 16 are respectively the C-C and D-D sectional views of FIG. 14;

FIG. 17 is a schematic view of the structure of the output seal cap of the present invention;

FIG. 18 is a schematic illustration of a split face of an output seal cap;

FIG. 19 is a schematic cross-sectional view of an open oil seal according to the present invention;

FIG. 20 is a schematic view of the structure of the oil distributor base of the present invention;

FIGS. 21-26 are cross-sectional views of A-A, B-B, C-C, D-D, E-E, F-F, respectively, of FIG. 20.

Description of the embodiments

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

the marine gearbox shown in fig. 1 to 4 comprises a shell, an input shaft component 20, a transmission shaft component 30, an output shaft component 40 and a control system component 50, wherein the input shaft component 20, the transmission shaft component 30 and the output shaft component 40 are all arranged in the shell through bearings, and are in gear transmission, and the input shaft component 20 is also connected with a high-elastic coupler 10 or a rubber tooth sleeve coupler.

The input shaft component 20 comprises an input shaft 201, a coupling 203, a right-handed transmission gear 204, a clutch assembly and a driving gear assembly 202 which are sequentially arranged on the input shaft 201, wherein the coupling 203 is in interference fit connection with the conical surface of the input shaft 201, the right-handed transmission gear 204 is in hot sleeve connection with the input shaft 201, the clutch assembly comprises a clutch shell, a clutch seat 205, a piston 206, a spring 207, a spring supporting plate 208, a first friction plate 209, a second friction plate 210 and a bearing plate 211, the clutch shell is arranged at one end of the right-handed transmission gear 204 and is integrally formed with the right-handed transmission gear 204, the clutch seat 205 is welded at one end of the driving gear assembly 202 through an electron beam, the first friction plate 209 and the second friction plate 210 are respectively in spline connection with a male spline on the clutch seat, and the clutch shell on the right-handed transmission gear 204, and the first friction plate 209 and the second friction plate 210 are alternately arranged; the piston 206 is arranged in the inner cavity of the right-handed transmission gear 204, the spring supporting plate 208 is fixed on the input shaft 201, and the spring 207 is arranged between the piston 206 and the spring supporting plate 208; the pressure bearing plate 211 is fixed at one end of the clutch base 205 or the clutch housing far away from the piston, and pressure oil is introduced to move the piston 206 and press the first friction plate 209 and the second friction plate 210, so that the right-handed transmission gear 204 and the driving gear assembly 202 rotate simultaneously, the pressure oil is led out, and the piston 206 is reset under the action of the spring 207, so that the right-handed transmission gear 204 is separated from the driving gear assembly 202, as shown in fig. 9.

The clutch seat is welded on the driving gear component in an electron beam welding mode, so that the connecting strength is high, the welding line is smaller, and the whole length of the driving gear component is shortened; in order to facilitate the withdrawal of the milling cutter for processing the tooth part, the clutch seat and the tooth part need to reserve one end space, so that the active gear assembly is longer, or the tooth part and the clutch seat are staggered in the radial direction, so that the active gear assembly has larger volume in the radial direction, and the integral miniaturization of the gear box is not facilitated.

As shown in fig. 2, the clutch seat 205 at one end of the driving gear assembly 202 is supported on the input shaft 201 through a second tapered roller bearing 215, and the other end of the driving gear assembly 202 is supported on the housing through a third tapered roller bearing 216; the clutch seat 205 and the third tapered roller bearing 216 are respectively located at two ends of the driving tooth portion of the driving gear assembly 202. Because one end of the driving gear component is supported on the box body, and the other end of the driving gear component is supported on the input shaft, the invention has compact overall structure, small volume, light weight and high reliability.

As shown in fig. 2 and 3, one end of the box is provided with an input shaft front cover 535, the input shaft 201 passes through the input shaft front cover 535, a sealing ring 534 is further arranged between the input shaft 201 and the input shaft front cover 535, the right-handed transmission gear 204 on the input shaft 201 is supported on the box through a first tapered roller bearing 213, the other end of the box is further provided with an input shaft rear cover 526, and the other end of the input shaft 201 is supported on the input shaft rear cover 526 through a first cylindrical roller bearing 214.

As shown in fig. 10 to 13, the coupling 203 includes a coupling body 2031, an end face key 2032 is provided on an end face of one end of the coupling body 2031 in a protruding manner, the right-hand transmission gear 204 includes a right-hand transmission gear main body 2041, and a key slot 2043 into which the end face key 2032 is inserted is provided on the right-hand transmission gear main body 2041; the number of the end face keys 2032 and the number of the key grooves 2043 are two, and the end face keys 2032 and the key grooves 2043 are symmetrically arranged; the right-hand transmission gear main body 2041 is further provided with a transmission gear portion 2042.

According to the invention, the coupling 203 is in interference connection with the conical surface of the input shaft 201, the right-handed transmission gear 204 is in thermal sleeve connection with the input shaft 201, and torque transmission is further carried out between the coupling and the right-handed transmission gear in a way of an end face key and a key groove, so that the combination length of the coupling and/or the right-handed transmission gear and the input shaft is reduced, meanwhile, slipping does not occur, the length of the input shaft is further reduced, and the whole size of the gearbox is reduced.

As shown in fig. 2, 3 and 9, a working oil path 305 and a lubrication oil path 306 are provided in the input shaft 201, a second oil inlet 525 is further provided on the input shaft rear cover 526, and one end of the second oil inlet 525 is communicated with the working oil path 305 and the lubrication oil path 306; the other end is connected to the control system part 50, the working oil path 305 is connected to the oil cylinder of the clutch, and the lubrication oil path 306 is connected to each bearing on the input shaft part 20. One end of the coupling 203 is fixedly connected with the high-elastic coupling 10 or the rubber tooth-shaped sleeve type coupling, the other end of the coupling is also provided with an oil thrower 212, and one end of the input shaft 201 is also provided with an oil pump transmission sleeve 217.

As shown in fig. 2, the transmission shaft component 30 includes a transmission shaft 301, and a first transmission gear assembly 302, a clutch assembly and a second transmission gear assembly 303 sequentially disposed on the transmission shaft 301, wherein one end of the first transmission gear assembly 302 is supported on the transmission shaft 301 through a bearing, the other end of the first transmission gear assembly is supported on a box body through a bearing, the second transmission gear assembly 303 is in shrink fit connection with the transmission shaft 301, the first transmission gear assembly 302 and the right-handed transmission gear 204 are in meshed transmission, and the first transmission gear assembly 302 and the second transmission gear assembly 303 are synchronously rotated or respectively rotated through the clutch assembly.

The clutch assembly on the transmission shaft component has the same structure as the clutch assembly in the input shaft component, the clutch assembly on the transmission shaft component is a reversing clutch, and the clutch assembly in the input shaft component is a forward clutch; the second transmission gear assembly 303 has the same structure as the right-handed transmission gear, and the first transmission gear assembly 302 has the same structure as the driving gear assembly.

As shown in fig. 3, the front end of the box body is further provided with a front cover 536 of the transmission shaft, the rear end of the box body is further provided with a rear cover 522 of the transmission shaft, a second transmission gear assembly 303 at one end of the transmission shaft 301 is supported on the box body through a bearing, the other end of the transmission shaft 301 is supported on the rear cover 522 of the transmission shaft through a bearing, an oil distributing bushing 524 is further arranged between the rear cover 522 of the transmission shaft and the transmission shaft 301, a working oil way 305 and a lubricating oil way 306 are further arranged in the transmission shaft 301, the working oil way 305 and the lubricating oil way 306 are both communicated with the oil distributing bushing 524, the rear cover 522 of the transmission shaft is further provided with a first oil inlet 304, one end of the first oil inlet 304 is communicated with the oil distributing bushing 524, the other end is communicated to the control system component 50 through an oil way of the box body, the working oil way 305 is communicated to an oil cylinder of the clutch, the lubricating oil way 306 is connected to each bearing on the transmission shaft component, an O-shaped ring 521 is further arranged between the first oil inlet 304 and the box body, and the rear cover 522 of the transmission shaft is further fixed with the rear cover plate of the transmission shaft.

As shown in fig. 2 and 8, the output shaft member 40 includes an output shaft 401 and a driven gear 402 that is heat-sleeved on the output shaft 401, one end of the output shaft 401 is supported on the case by a fourth tapered roller bearing 404, and the other end is supported on the case by a second tapered roller bearing 405; the driven gear is respectively meshed with the driving gear assembly and the first transmission gear assembly for transmission, and is operated in a forward direction when the driven gear is driven by the driving gear assembly, and is operated in a reverse direction when the driven gear is driven by the first transmission gear assembly.

As shown in fig. 8, the other end of the output shaft 401 is provided with an output flange, the output shaft 401 and the output flange are integrally formed, two ends of the box body, which are positioned at the output shaft 401, are respectively provided with an output shaft front cover 533 and an output sealing cover 528, the output sealing cover 528 comprises a first split sealing cover 5281 and a second split sealing cover 5282 which are mutually spliced along the radial direction, and the splicing surfaces of the first split sealing cover 5281 and the second split sealing cover 5282 are respectively provided with a connecting part 5283, and the first split sealing cover 5281 and the second split sealing cover 5282 are fastened by bolts or pins arranged in the connecting part 5283.

As shown in fig. 17 to 19, the output shaft 401 passes through the output sealing cover 528, and an open oil seal 530 is further disposed between the output shaft 401 and the output sealing cover 528, a baffle 531 is fixed on the inner side of the output sealing cover 528, a pressing plate 529 is fixed on the outer side of the output sealing cover 528, and the baffle 531 and the pressing plate 529 clamp the open oil seal 530; the open oil seal 530 is provided with a notch 5304, the open oil seal 530 includes a frame 5302, an oil seal body 5301 and a V-shaped ring 5303, the frame 5302 and the V-shaped ring 5303 are respectively embedded at two sides of the oil seal body 5301, and the frame 5302 is located at an outer ring of the V-shaped ring 5303.

The output shaft 401 and the output flange are integrally formed, so that the integral length of the output shaft part is reduced while the connection strength can be ensured, but after an integral structure is adopted, the traditional integral output sealing cover 528 and the integral oil seal are difficult to install, so that the output sealing cover 528 adopts a split type oil seal, the opening oil seal is arranged on the output shaft during installation, the notch of the opening oil seal faces upwards, grease is filled in a notch gap, then the first split sealing cover 5281 and the second split sealing cover 5282 are combined and fixed on a box body through bolts, finally, the pressing plate is fixed on the output sealing cover, the opening oil seal is pressed, and the integral installation operation is more convenient.

As shown in fig. 8, an output pressing plate 403 is further fixed to one end of the output shaft 401 by a fastening bolt 407, and a spacer 406 is provided between the cylindrical roller bearing 405 and the driven gear 402.

As shown in fig. 5 to 7, the control system part 50 includes a hydraulic controller 501, an oil distributor base 502, a lubrication valve 503 and a dual-tube oil filter 520, the oil distributor base 502 is fixed on the top of the tank, and a plurality of oil holes communicated with the tank are formed in the oil distributor base 502, and the hydraulic controller 501, the oil distributor base 502 and the lubrication valve 503 are respectively fixed on the oil distributor base 502 and communicated with the corresponding oil holes.

The bottom in the box is also provided with an oil baffle disc 532, the lower part outside the box is provided with a filter screen assembly 519, the filter screen assembly 519 is communicated with the inside of the box, the input shaft rear cover 526 is also fixedly provided with an oil pump 510 through an oil pump connecting plate 527, the oil pump shaft is connected with the end part of the input shaft 201 through an oil pump transmission sleeve 217, one side of the box is also provided with a cooler 513 through a connecting plate 514, the oil pump 510 is connected with the filter screen assembly 519 through an oil suction pipe assembly 505, the oil pump 510 is connected with a cooler oil inlet 512 on the cooler 513 through an oil outlet pipe assembly 511, and the cooler 513 is connected to a double-cylinder oil filter 520 through a pipeline; the engine oil from the oil pump is filtered by the cooler and then is connected into the oil distributing seat to enter the hydraulic control component, and is regulated and distributed by the hydraulic control component to be led into each working position. The inside of the matched device seat is provided with a pipeline, and the specific structure is shown in fig. 20 to 26.

The invention integrates and modularizes the functional parts of the control system part 50, reduces excessive parts, reduces pipeline connection, and can better meet the ship-shaped design requirement. The device has the characteristics of compact structural arrangement, attractive appearance, high working and maintenance reliability, suitability for long-term working at high rotating speed and the like.

The marine gear box is driven by three-shaft five gears, the first-stage decelerating and reversing two sets of clutches are arranged in parallel, after the main engine is started, the power is driven by the input shaft coupling to rotate, and the transmission shaft rotates in the opposite direction of the input shaft. When the gear box operating handle is in the 'stop' position, the forward clutch and the reverse clutch are both in a disengaged state, and the output shaft does not rotate. When the operating handle is in the forward position, the forward clutch is engaged, and power is transmitted from the input shaft to the output shaft through the forward clutch, the driving gear assembly and the driven gear, and the rotation direction of the driving gear assembly and the driven gear is opposite to that of the input shaft. When the operating handle is in the "reverse" position, the forward clutch is disengaged and the reverse clutch is engaged, power is transmitted from the input shaft through the drive shaft and then through the reverse clutch, the first drive gear assembly 302 and the driven gear to the output shaft in the same direction of rotation as the input shaft.

The marine gearbox is hydraulically operated, the hydraulic controller 501 comprises a reversing valve 5017 and a working pressure valve 544 for lubrication 503, when the oil pump works, engine oil is sucked from a tank oil pool through a coarse filter 5191 (a filter screen component) and then is conveyed to a cooler in a pressing mode, after being cooled and finely filtered, one path of engine oil can be led to an oil cylinder of the forward clutch 2000 or the reverse clutch 2100 through the reversing valve 5017, the other path of engine oil overflows from the working pressure valve 544, one part of engine oil is led to each lubrication part through oil holes in an input shaft and a transmission shaft and oil is sprayed and lubricated on a meshing tooth surface through an oil spraying pipe, the other part of engine oil overflows back to the tank oil pool through the lubricating valve 503, and the lubricating oil pressure can be regulated by the lubricating valve 503. The pressure is regulated to be 0.06-0.45 MPa when leaving the factory, and the pressure is not regulated when being used by a user.

When the reversing valve 5017 is in the park position, the operating pressure valve 544 maintains the system pressure in a lower initial pressure range (0.18-0.6 MPa). If the filter is clogged, oil can pass through the bypass valve 5.

When the reversing valve is at the forward or reverse position, namely one path of pressure oil is led to the control end of the working pressure valve through the throttle valve 545, the system pressure is increased to 1.4-1.6 Mpa from the initial pressure state through 3-5 seconds of delay, and meanwhile, the throttle valve 546 is also arranged on the path of oil, and the clutch is stably and softly engaged due to the effect of delay and pressure increase, so that the normal operation of forward and reverse is ensured.

The hydraulic controller 501 of the marine gearbox of the present invention may be in the form of "manual", "electric" or "pneumatic".

1. When the gear box adopts a manual control valve, a steel wire rope (or other modes) can be used for rotating the control handle to control the forward direction, the stop direction and the reverse direction of the gear box, and the traction force (pushing force and pulling force) of the steel wire rope is required to be more than 6kg. When the frame is combined into a whole and remotely operated, the forward, stop and reverse operating positions of the steering platform are consistent with the positions of the operating handles of the gearbox.

2. The gear box adopts the solenoid valve control time, and the solenoid valve is three-position five-way form, uses voltage: 24V (DC), voltage ripple: less than or equal to 15 percent; maximum current: imax=0.94A; the two ends of the electromagnetic valve are provided with emergency manual mechanical buttons for machine side operation under the condition of power failure.

2. When the gear box is operated by adopting the pneumatic operating valve, the pneumatic operating valve is a three-position five-way pneumatic slide valve, the control air pressure is 0.5-1 Mpa, three air inlet and outlet holes are arranged, the orifice threads are M14 multiplied by 1.5, when the air inlet holes are used for air inlet, the other two holes are used for air outlet, the pneumatic control valve is stopped, the manual emergency handle is at the stop position, the working oil pressure is in an initial low-pressure state, and the gear box is in the stop working condition. The user can decide the orientation of the forward and reverse holes according to the installation requirement of the real ship, and when the forward (or reverse) vehicle is in air, the valve rod is shifted to drive the handle to swing leftwards (or rightwards).

The box body is also provided with a top cover plate 506, the top cover plate 506 is also provided with an air hole cap 507, in order to further improve the safety and reliability of the offshore operation of the gearbox, the bearing plate 211 is provided with an emergency bolt used as an emergency device, when a hydraulic control component is in failure, the top cover plate on the box body can be disassembled, and then the emergency bolt is screwed down to enable the first friction plate 209 and the second friction plate 210 to be compressed; the forward clutch is engaged, and after the top cover plate is installed, the ship can continue sailing for a short time.

The box body is also provided with an oil injection port 504, the corresponding oil hole of the hydraulic controller 501 is connected to the oil injection port 504 on the box body, the top of the box body is also provided with an alarm through an alarm mounting plate 541, and the corresponding oil hole of the oil distributor base 502 is connected with the alarm; the alarm is used for carrying out lubricating oil pressure alarm indication, working oil pressure alarm indication, reversing operation indication and forward operation indication, the oil distributor base 502 is also connected with a thermometer 540 and a pressure gauge 539, two sides of the box body are also provided with a bracket 517, the bracket 517 is provided with a hanging ring 516, the box body is also provided with an oil scale assembly 515, and the lower part of the box body is provided with an oil drain bolt 518. The top of the upper box body is provided with a viewing window for viewing parts such as gears, clutches and the like. The oil scale on the box body is used for checking the oil level. The movable brackets are arranged on two sides of the box body, and the brackets with different supporting heights can be replaced according to the requirements so as to adapt to the matching of different hosts.

As shown in fig. 14 to 16, the housing includes a casing 509 and a case, the case includes an upper case and a lower case fixed by bolts, the casing 509 includes a first half-casing 5091 and a second half-casing 5092 that are mutually spliced in the radial direction, a split surface of the first half-casing 5091 and the second half-casing 5092 is further provided with a half-connecting portion 5094, the first half-casing 5091 and the second half-casing 5092 are fastened by bolts passing through the half-connecting portion 5094, a connecting edge portion 5093 is further provided on the outer periphery of the first half-casing 5091 and the second half-casing 5092, and a connecting hole for fixing with the case is further provided on the second half-casing 5092. A cover plate 508 is also provided on the first halved housing 5091.

When the gearbox is required to be maintained, all the connecting bolts and pins of the first split cover 5091 and the second split cover 5092 are unscrewed, all the connecting bolts and pins of the upper box body and the lower box body are unscrewed, and then the input rear end cover, the transmission shaft rear end cover and the oil pump assembly are disassembled. The connecting bolts of the first split cover 5091 and the upper box body are screwed out, the first split cover 5091 and the upper box body are hung out in sequence, a wood pillow and a piece of packing paper are padded below the connecting bolts to prevent the joint surface from being damaged, and then the input shaft component is hung out to detach and replace the high-elastic coupler 10 or the rubber tooth-shaped sleeve coupler and the second split cover 5092. The assembly sequence is reversed from the disassembly procedure. Compared with the traditional structure gear, the maintenance does not need to move the host and the stern shaft, and the three lines of the gear box do not need to be aligned again, so that the maintenance time and the maintenance cost can be greatly saved.

The marine gearbox has the advantages of compact structure, small volume, light weight, large transmission capacity, high reliability, attractive appearance, low manufacturing cost and convenient assembly, disassembly and maintenance.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by those skilled in the art without departing from the spirit and principles of the invention, and any simple modification, equivalent variation and modification of the above embodiments in light of the technical principles of the invention may be made within the scope of the present invention.

Claims

1. The utility model provides a marine gear box, includes casing, input shaft part (20), transmission shaft part (30), output shaft subassembly (40) and control system part (50), input shaft part (20), transmission shaft part (30), output shaft subassembly (40) all set up in the casing through the bearing, and through gear drive, still be connected with high-elastic shaft coupling (10) or rubber tooth form cover shaft coupling on input shaft part (20), control system part (50) set up on the casing, its characterized in that:

the input shaft component (20) comprises an input shaft (201), a coupling (203), a right-handed transmission gear (204), a clutch assembly and a driving gear assembly (202) which are sequentially arranged on the input shaft (201), wherein the coupling (203) is in interference connection with the conical surface of the input shaft (201), the right-handed transmission gear (204) is in thermal sleeve connection with the input shaft (201),

the clutch assembly comprises a clutch shell, a clutch seat (205), a piston (206), a spring (207), a spring supporting plate (208), a first friction plate (209), a second friction plate (210) and a bearing plate (211),

the clutch housing is arranged at one end of the right-handed transmission gear (204) and is integrally formed with the right-handed transmission gear (204), the clutch base (205) is welded at one end of the driving gear assembly (202) through electron beams, the first friction plate (209) and the second friction plate (210) are respectively connected with an external spline on the clutch base and a clutch housing spline on the right-handed transmission gear (204), and the first friction plate (209) and the second friction plate (210) are alternately arranged; the piston (206) is arranged in the inner cavity of the right-handed transmission gear (204), the spring supporting plate (208) is fixed on the input shaft (201), and the spring (207) is arranged between the piston (206) and the spring supporting plate (208); the bearing plate (211) is fixed at one end of the clutch seat (205) or the clutch housing, which is far away from the piston,

a clutch seat (205) at one end of the driving gear assembly (202) is supported on the input shaft (201) through a second tapered roller bearing (215), and the other end of the driving gear assembly (202) is supported on the box body through a third tapered roller bearing (216); the clutch seat (205) and the third tapered roller bearing (216) are respectively positioned at two ends of a driving tooth part of the driving gear assembly (202);

the coupling (203) comprises a coupling body (2031), an end face key (2032) is convexly arranged on the end face of one end of the coupling body (2031), the right-hand transmission gear (204) comprises a right-hand transmission gear main body (2041), and a key slot (2043) for inserting the end face key (2032) is arranged on the right-hand transmission gear main body (2041);

the transmission shaft component (30) comprises a transmission shaft (301), and a first transmission gear assembly (302), a clutch assembly and a second transmission gear assembly (303) which are sequentially arranged on the transmission shaft (301), wherein one end of the first transmission gear assembly (302) is supported on the transmission shaft (301) through a bearing, the other end of the first transmission gear assembly is supported on a box body through a bearing, the second transmission gear assembly (303) is in thermal sleeve connection with the transmission shaft (301), the first transmission gear assembly (302) is in meshed transmission with the right-handed transmission gear (204), and the first transmission gear assembly (302) and the second transmission gear assembly (303) are synchronously rotated or respectively rotated through the clutch assembly;

the output shaft assembly (40) comprises an output shaft (401) and a driven gear (402) which is thermally sleeved on the output shaft (401), one end of the output shaft (401) is supported on the box body through a fourth tapered roller bearing (404), and the other end of the output shaft is supported on the box body through a second tapered roller bearing (405); the driven gear (402) is in meshed transmission with the driving gear assembly (202) or the first transmission gear assembly (302);

the control system component (50) comprises a hydraulic controller (501), an oil distributor base (502), a lubricating valve (503) and a double-cylinder oil filter (520), wherein the oil distributor base (502) is fixed at the top of the box body, a plurality of oil holes communicated with the box body are formed in the oil distributor base (502), and the hydraulic controller (501), the oil distributor base (502) and the lubricating valve (503) are respectively fixed on the oil distributor base (502) and communicated with the corresponding oil holes;

an input shaft front cover (535) is arranged at one end of the box body, the input shaft (201) penetrates through the input shaft front cover (535), a sealing ring (534) is further arranged between the input shaft (201) and the input shaft front cover (535), a right-handed transmission gear (204) on the input shaft (201) is supported on the box body through a first tapered roller bearing (213), an input shaft rear cover (526) is further arranged at the other end of the box body, and the other end of the input shaft (201) is supported on the input shaft rear cover ((526) through a first cylindrical roller bearing (214);

the oil baffle disc (532) is further arranged at the bottom in the box body, the lower part outside the box body is provided with the filter screen assembly (519), the filter screen assembly (519) is communicated with the inside of the box body, the oil pump (510) is further fixed on the rear cover (526) of the input shaft through the oil pump connecting plate (527), the oil pump transmission sleeve (217) is further arranged at one end of the input shaft (201), the oil pump shaft is connected with the end part of the input shaft (201) through the oil pump transmission sleeve (217), the cooler (513) is further arranged at one side of the box body through the connecting plate (514), the oil pump (510) is connected with the filter screen assembly (519) through the oil suction pipe assembly (505), the oil pump (510) is connected with the cooler oil inlet (512) on the cooler (513) through the oil outlet pipe assembly (511), and the cooler (513) is connected to the double-barrel oil filter (520) through a pipeline; the engine oil from the oil pump (510) enters the hydraulic control component through the double-cylinder oil filter (520) after passing through the cooler (513), and is introduced into each working position after being regulated and distributed by the hydraulic control component;

the other end of the output shaft (401) is provided with an output flange, the output shaft (401) and the output flange are integrally formed, an output shaft front cover (533) and an output sealing cover (528) are respectively arranged at two ends of the output shaft (401) on the box body, the output sealing cover (528) comprises a first bisectional sealing cover (5281) and a second bisectional sealing cover (5282) which are mutually spliced along the radial direction, connecting parts (5283) are respectively arranged on the splicing surfaces of the first bisectional sealing cover (5281) and the second bisectional sealing cover (5282) and are fastened through bolts or pins arranged in the connecting parts (5283); the output shaft (401) penetrates out of the output sealing cover (528), an opening oil seal (530) is further arranged between the output shaft (401) and the output sealing cover (528), a baffle plate (531) is fixed on the inner side of the output sealing cover (528), a pressing plate (529) is fixed on the outer side of the output sealing cover (528), and the baffle plate (531) and the pressing plate (529) clamp the opening oil seal (530); the opening oil seal (530) is provided with a notch (5304), the opening oil seal (530) comprises a framework (5302), an oil seal body (5301) and a V-shaped ring (5303), the framework (5302) and the V-shaped ring (5303) are respectively embedded in two sides of the oil seal body (5301), and the framework (5302) is located on the outer ring of the V-shaped ring (5303).

2. A marine gearbox according to claim 1, wherein: the oil injection device is characterized in that an oil injection port (504) is further formed in the box body, a corresponding oil hole of the hydraulic controller (501) is connected to the oil injection port (504) in the box body, an alarm is further arranged at the top of the box body through an alarm mounting plate (541), and a corresponding oil hole of the oil distributor seat (502) is connected with the alarm.

3. A marine gearbox according to claim 1, wherein: the inside of the input shaft (201) is provided with a working oil way (305) and a lubricating oil way (306), the rear cover (526) of the input shaft is also provided with a second oil inlet (525), and one end of the second oil inlet (525) is communicated with the working oil way (305) and the lubricating oil way (306); the other end is communicated with the control system component (50), the working oil way (305) is communicated with the oil cylinder of the clutch, and the lubricating oil way (306) is connected to each bearing on the input shaft component (20).

4. A marine gearbox according to claim 1, wherein: the front end of box still is equipped with transmission shaft protecgulum (536), the rear end of box still is equipped with transmission shaft back lid (522), and second drive gear subassembly (303) of transmission shaft (301) one end are supported on the box through the bearing, the other end of transmission shaft (301) is supported on transmission shaft back lid (522) through the bearing.

5. A marine gearbox as claimed in claim 4, wherein: still be equipped with branch oily bush (524) between lid (522) behind the transmission shaft and transmission shaft (301), the inside of transmission shaft (301) still is equipped with working oil circuit (305) and lubricating oil circuit (306), and working oil circuit (305) and lubricating oil circuit (306) all with divide oily bush (524) intercommunication, still be equipped with first oil inlet (304) on lid (522) behind the transmission shaft, the one end and the oily bush (524) intercommunication of branch of first oil inlet (304), the oil circuit intercommunication of the other end through the box is to control system part (50), and working oil circuit (305) communicate the hydro-cylinder to the clutch, and lubricating oil circuit (306) are connected to each bearing department on transmission shaft part (30), still are equipped with O type circle (521) between first oil inlet (304) and the box.

6. A compact marine gearbox as recited in claim 1, wherein: the box body is further provided with a top cover plate (506), the bearing plate (211) is provided with an emergency bolt used as an emergency device, and the bolt is located below the top cover plate (506).