CN113323994A

CN113323994A - Marine gear box

Info

Publication number: CN113323994A
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: 2021-08-31
Anticipated expiration: 2041-06-02
Also published as: CN113323994B

Abstract

The invention relates to a marine gear box, which comprises a shell, an input shaft component, a transmission shaft component, an output shaft component and a control system component, wherein a clutch shell and a right-handed transmission gear are integrally formed; the control system component comprises a hydraulic controller, an oil distributor base, a lubricating valve and a double-cylinder oil filter, wherein the hydraulic controller, the oil distributor base and the lubricating valve are respectively fixed on the oil distributor base and are communicated with corresponding oil holes; the invention makes the whole volume of the gear box more compact. The invention integrates and modularizes all functional parts of the control system component, reduces excessive parts and pipeline connection, and can better meet the design requirement of the ship type.

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

Aiming at the problem that the marine gearbox in the prior art generally has two structural types of an outer support and an inner support, a driving gear of the marine gearbox with the traditional outer support structure is generally supported on a box body by adopting two bearings, so that the axial size is larger, 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 are of an integrated structure, friction plates are small, transmission power is limited, the driving gear generally needs to be sleeved on an input shaft or a transmission shaft through a needle bearing or a sliding shaft sleeve in an empty mode, axial force in gear working needs to be borne by a thrust needle roller or a thrust sliding bearing, the structure is complex, a plurality of easily damaged parts are arranged, meanwhile due to the fact that the gap needs to be adjusted, the input shaft and the transmission shaft generally can be fixed back and forth, maintenance generally needs to be integrally lifted out, and maintenance is very difficult.

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

In addition, the marine high-speed gear box adopts a hydraulic system to provide lubricating oil for the gear box, and the functions of forward driving, reverse driving and releasing (neutral gear) of the gear box output are realized by controlling the forward driving clutch and the reverse driving clutch. The hydraulic system of the small-sized marine high-speed gear box generally comprises an oil suction oil filter, a gear pump, a water cooler, an oil filter, an operation valve group and the like, each part is an independently dispersed part and is arranged at different positions of the gear box, and a plurality of oil pipes are connected with each other, so that the gear box is troublesome to manufacture and install, particularly, a user needs to install the gear box for alarming, the various oil pipes are randomly distributed outside the gear box, the oil is easy to damage and leak, the appearance is not attractive, the effect of regulating and controlling the lubricating oil pressure by the lubricating pressure valves which are dispersedly arranged is poor, the lubricating oil pressure is too low and gives an alarm at low speed, the pressure exceeds the range at high speed, and great troubles 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 has a compact structure, large transmission torque and high integration of control system components.

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

the utility model provides a marine gear box, includes casing, input shaft part, drive shaft part, output shaft subassembly and control system part, input shaft part, drive shaft part, output shaft subassembly all set up in the casing through the bearing, and pass through gear drive, still be connected with high-elastic shaft coupling or rubber profile of tooth cover coupling joint on the input shaft part, control system part sets up on the casing, the input shaft part includes the input shaft and sets gradually shaft coupling, dextrorotation drive gear, clutch subassembly, the driving gear subassembly on the input shaft, shaft coupling and input shaft conical surface interference hookup, dextrorotation drive gear and the hot cover hookup of 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 pressure bearing plate,

the clutch shell is arranged at one end of the right-hand transmission gear and is integrally formed with the right-hand transmission gear, the clutch seat is welded at one end of the driving gear assembly through electron beams, the first friction plate and the second friction plate are respectively connected with an external spline on the clutch seat and a clutch shell 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 on the clutch seat or one end of the clutch shell 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 conical 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 groove 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 component, a clutch component and a second transmission gear component which are sequentially arranged on the transmission shaft, wherein one end of the first transmission gear component is supported on the transmission shaft through a bearing, the other end of the first transmission gear component is supported on the box body through a bearing, the second transmission gear component is connected with the transmission shaft through a hot sleeve, the first transmission gear component is in meshed transmission with the right-handed transmission gear, and the first transmission gear component and the second transmission gear component synchronously rotate or respectively rotate through the clutch component;

the output shaft part comprises an output shaft and a driven gear sleeved on the output shaft in a hot mode, one end of the output shaft is supported on the box body through a third tapered roller bearing, and the other end of the output shaft is supported on the box body through a second cylindrical roller bearing; the driven gear is in meshing transmission with the driving gear assembly or the first transmission gear assembly;

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, the oil distributor seat is provided with a plurality of oil holes communicated with the box body, and the hydraulic controller, the oil distributor seat and the lubricating valve are respectively fixed on the oil distributor seat and communicated with the corresponding oil holes;

an oil baffle disc is further arranged at the bottom in the box body, a filter screen assembly is arranged at the lower part outside the box body and is communicated with the inside of the box body, an oil pump (510) is further fixed on the rear cover of the input shaft through an oil pump connecting plate, an oil pump transmission sleeve is further arranged at one end of the input shaft, an oil pump shaft is connected with the end part of the input shaft through the oil pump transmission sleeve, a cooler is further arranged on one side of the box body 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 an oil inlet of the cooler on the cooler through an oil outlet pipe assembly, and the cooler is connected to a double-cylinder oil filter through a pipeline; the engine oil from the oil pump enters the hydraulic control part through the cooler and the double-cylinder oil filter, and is guided into each working position after being regulated and distributed by the hydraulic control part.

As a preferable scheme: the oil distributor is characterized in that an oil injection port is further formed in the box body, the oil hole corresponding to 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 oil hole corresponding to 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, the last right-handed drive gear of input shaft supports on the box through first tapered roller bearing, the other end of box still is equipped with the input shaft back cover, the other end of input shaft supports on the input rear end cap through first cylindrical roller bearing.

As a preferable scheme: a working oil path and a lubricating oil path are arranged inside the input shaft, a second oil inlet is also formed in the rear cover of the input shaft, and one end of the second oil inlet is communicated with the working oil path and the lubricating oil path; the other end is communicated to a control system component, a working oil way is communicated to 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 further provided with a transmission shaft front cover, the rear end of the box body is further provided with a transmission shaft rear cover, the 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: the oil distribution device is characterized in that an oil distribution bush is further arranged between the transmission shaft rear cover and the transmission shaft, a working oil path and a lubricating oil path are further arranged inside the transmission shaft, the working oil path and the lubricating oil path are communicated with the oil distribution bush, a first oil inlet is further formed in the transmission shaft rear cover, one end of the first oil inlet is communicated with the oil distribution bush, the other end of the first oil inlet is communicated to a control system component through an oil path of the box body, the working oil path is communicated to an oil cylinder of the clutch, the lubricating oil path is connected to each bearing on the transmission shaft component, and an O-shaped ring is further arranged.

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, an output shaft front cover and an output sealing cover are respectively arranged at two ends of the box body, which are positioned at the output shaft, the output sealing cover comprises a first split seal cover and a second split seal cover which are mutually spliced along the radial direction, connecting parts are arranged on splicing surfaces of the first split seal cover and the second split seal cover, and the first split seal cover and the second split seal 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 an incision, the opening oil seal comprises a framework, an oil seal body and a V-shaped ring, the framework and the V-shaped ring are respectively embedded in two sides of the oil seal body, and the framework is located on an outer ring of the V-shaped ring.

As a preferable scheme: still be equipped with the lamina tecti on the box, the bearing plate is equipped with the emergent bolt that uses as emergency device, and the bolt is located the lamina tecti below.

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

the clutch seat is welded on the driving gear assembly in an electron beam welding mode, so that the connecting strength is high, the welding seam is small, and the overall length of the driving gear assembly is shortened; the coupling is in interference fit connection with the conical surface of the input shaft, the right-hand transmission gear is in heat sleeve connection with the input shaft, and torque is transmitted between the coupling and the right-hand transmission gear in an end face key and key groove mode.

In addition, the invention integrates and modularizes all functional parts of the control system component, reduces excessive parts and pipeline connection, and can better meet the design requirement of the ship type. The novel high-speed electric fan has the characteristics of compact structural arrangement, attractive appearance, high reliability in working and maintenance, capability of adapting to long-term working at high rotating speed and the like.

Drawings

The accompanying drawings, which 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 are not intended to limit the application.

FIG. 1 is a schematic view 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 the housing of the present invention;

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

5-7 are schematic views of the end, side and top surfaces of the housing and the mounting structure of the control system component, the oil pump and the cooler component, respectively, according to the present invention;

FIG. 8 is a schematic view of the overall construction of the output shaft assembly of the present invention;

FIG. 9 is a schematic view of the overall construction of the input shaft assembly of the present invention;

FIG. 10 is a schematic structural 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 structural view of the coupling of the present invention;

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

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

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

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

FIG. 18 is a schematic view of a split surface of the output seal gland;

FIG. 19 is a sectional view schematically showing the structure of the oil seal according to the present invention;

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

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

Detailed Description

The invention will be further illustrated with reference to the following examples and drawings:

the marine gearbox as shown in fig. 1 to 4 comprises a shell, an input shaft part 20, a transmission shaft part 30, an output shaft assembly 40 and a control system part 50, wherein the input shaft part 20, the transmission shaft part 30 and the output shaft assembly 40 are all arranged in the shell through bearings and are in gear transmission, and a high-elasticity coupling 10 or a rubber tooth-shaped sleeve coupling is further connected to the input shaft part 20.

The input shaft component 20 comprises an input shaft 201, a coupling 203, a right-turn transmission gear 204, a clutch component and a driving gear component 202 which are arranged on the input shaft 201 in sequence, the coupling 203 is in interference fit with the conical surface of the input shaft 201, the right-hand transmission gear 204 is in thermal sleeve connection with the input shaft 201, the clutch assembly includes a clutch housing, a clutch seat 205, a piston 206, a spring 207, a spring support plate 208, a first friction plate 209, a second friction plate 210, and a bearing plate 211, the clutch housing is disposed at one end of a right-hand drive gear 204, and is integrally formed with the right-hand drive gear 204, the clutch holder 205 is welded to one end of the drive gear assembly 202 by electron beams, the first friction plate 209 and the second friction plate 210 are respectively connected with an external spline on a clutch seat and a clutch shell 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 pressure bearing plate 211 is fixed to the clutch seat 205 or one end of the clutch housing away from the piston, 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 to discharge the pressure oil, and the piston 206 is reset under the action of the spring 207 to separate the right-handed transmission gear 204 from the driving gear assembly 202, as shown in fig. 9.

The clutch seat is welded on the driving gear assembly in an electron beam welding mode, so that the connecting strength is high, the welding seam is small, and the overall length of the driving gear assembly is shortened; in order to facilitate the exit of a milling cutter for machining the tooth part, a space at one end needs to be reserved between the clutch seat and the tooth part, so that the driving gear assembly is longer, or the tooth part and the clutch seat are staggered in the radial direction, so that the size of the driving gear assembly in the radial direction is larger, and the whole miniaturization of a gear box is not facilitated.

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

As shown in fig. 2 and 3, an input shaft front cover 535 is disposed at one end of the casing, the input shaft 201 passes through the input shaft front cover 535, a seal ring 534 is disposed between the input shaft 201 and the input shaft front cover 535, the right-hand drive gear 204 on the input shaft 201 is supported on the casing through a first tapered roller bearing 213, an input shaft rear cover 526 is disposed at the other end of the casing, and the other end of the input shaft 201 is supported on the input 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 key 2032 is convexly provided on an end face of one end of the coupling body 2031, the right-hand drive gear 204 includes a right-hand drive gear main body 2041, and a key groove 2043 for the end key 2032 to be inserted into is provided on the right-hand drive gear main body 2041; the end face keys 2032 and the key grooves 2043 are two and are symmetrically arranged; the right-hand drive gear body 2041 is also provided with drive teeth portions 2042.

The coupling 203 is in interference fit connection with the conical surface of the input shaft 201, the right-hand transmission gear 204 is in heat sleeve connection with the input shaft 201, and the coupling and the right-hand transmission gear are in torque transmission in an end face key and key slot mode.

As shown in fig. 2, 3 and 9, a working oil path 305 and a lubricating oil path 306 are arranged inside the input shaft 201, a second oil inlet 525 is further arranged 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 lubricating oil path 306; the other end is connected to the control system component 50, the working oil path 305 is connected to the cylinder of the clutch, and the lubricating oil path 306 is connected to each bearing on the input shaft component 20. Coupling 203 one end and high-elastic shaft coupling 10 or rubber profile of tooth shell type coupling fixed connection, the other end still is equipped with oil thrower 212, the one end of input shaft 201 still is equipped with oil pump transmission cover 217.

As shown in fig. 2, the transmission shaft member 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, and the other end of the first transmission gear assembly 302 is supported on the box body through a bearing, the second transmission gear assembly 303 is thermally coupled to the transmission shaft 301, the first transmission gear assembly 302 is in meshing 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 clutch assembly on the transmission shaft part and the clutch assembly in the input shaft part have the same structure, the clutch assembly on the transmission shaft part is a reversing clutch, and the clutch assembly in the input shaft part is a forward clutch; the second transmission gear assembly 303 has the same structure as a right-hand transmission gear, and the first transmission gear assembly 302 has the same structure as a driving gear assembly.

As shown in fig. 3, a front transmission shaft cover 536 is further provided at the front end of the box, a rear transmission shaft cover 522 is further provided at the rear end of the box, the second transmission gear assembly 303 at one end of the transmission shaft 301 is supported on the box through a bearing, the other end of the transmission shaft 301 is supported on the rear transmission shaft cover 522 through a bearing, an oil distribution bushing 524 is further provided between the rear transmission shaft cover 522 and the transmission shaft 301, a working oil path 305 and a lubricating oil path 306 are further provided inside the transmission shaft 301, the working oil path 305 and the lubricating oil path 306 are both communicated with the oil distribution bushing 524, a first oil inlet 304 is further provided on the rear transmission shaft cover 522, one end of the first oil inlet 304 is communicated with the oil distribution bushing 524, the other end is communicated to the control system component 50 through an oil path of the box, the working oil path 305 is communicated to an oil cylinder of the clutch, and the lubricating oil path 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 a transmission shaft rear cover plate 523 is further fixed on the transmission shaft rear cover 522.

As shown in fig. 2 and 8, the output shaft assembly 40 includes an output shaft 401 and a driven gear 402 shrink-fitted on the output shaft 401, wherein one end of the output shaft 401 is supported on the casing by a third tapered roller bearing 404, and the other end is supported on the casing by a second cylindrical roller bearing 405; the driven gear is in meshing transmission with the driving gear assembly and the first transmission gear assembly respectively, and is used for performing forward operation when the driven gear is driven by the driving gear assembly and performing reverse operation 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, 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 split sealing cover 5281 and a second split sealing cover 5282 which are mutually split in the radial direction, a connecting portion 5283 is arranged on the split surface of each of the first split sealing cover 5281 and the second split sealing cover 5282, and the first split sealing cover 5281 and the second split sealing cover 5282 are fastened through a bolt or a pin arranged in the connecting portion 5238.

As shown in fig. 17 to 19, the output shaft 401 penetrates through 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 531 is fixed on the inner side of the output sealing cover 528, a pressure plate 529 is fixed on the outer side of the output sealing cover 528, and the baffle 531 and the pressure 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 on two sides of the oil seal body 5301, and the framework 5302 is located on the outer ring of the V-shaped ring 5303.

The output shaft 401 and the output flange are integrally formed, so that the connection strength can be guaranteed, meanwhile, the overall length of the output shaft part is reduced, but after the 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 in the invention adopts a split type, the oil seal adopts an open oil seal, during installation, the open oil seal is arranged on the output shaft, the cut of the open oil seal faces upwards, grease is filled in the gap of the cut, then the first split sealing cover 5281 and the second split sealing cover 5282 are spliced and fixed on the box body through bolts, finally the pressing plate is fixed on the output sealing cover, and the open oil seal is pressed tightly, so that the overall installation operation is more convenient.

As shown in fig. 8, an output pressure 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 component 50 includes a hydraulic controller 501, an oil distributor base 502, a lubrication valve 503, and a double-cylinder oil filter 520, the oil distributor base 502 is fixed on the top of the tank, the oil distributor base 502 is provided with a plurality of oil holes communicated with the tank, 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.

An oil baffle disc 532 is further arranged at the bottom in the box body, a filter screen assembly 519 is arranged at the lower part outside the box body, the filter screen assembly 519 is communicated with the box body, an oil pump (510) is further fixed on the input shaft rear cover 526 through an oil pump connecting plate 527, the shaft of the oil pump is connected with the end part of the input shaft 201 through an oil pump transmission sleeve 217, a cooler 513 is further arranged on one side of the box body 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 a cooler and then a double-cylinder oil filter, enters the oil distributor base, enters the hydraulic control part, is subjected to pressure regulation and distribution by the hydraulic control part and then is introduced into each working part. The inside of the adaptor seat is provided with a pipeline, and the specific structure is shown in figures 20 to 26.

The invention integrates and modularizes all functional parts of the control system component 50, reduces excessive parts and pipeline connection, and can better meet the design requirement of the ship type. The novel high-speed electric fan has the characteristics of compact structural arrangement, attractive appearance, high reliability in working and maintenance, capability of adapting to long-term working at high rotating speed and the like.

The marine gearbox is driven by five three-shaft gears, the first-stage speed reduction and reversing clutches are arranged in parallel, after a host is started, power drives an input shaft to rotate through an input coupling, and a transmission shaft rotates in the direction opposite to the input shaft. When the operating handle of the gear box is in a stop position, the forward clutch and the reverse clutch are in a disengaged state, and the output shaft does not rotate. When the operating handle is in the 'in-line' position, the in-line clutch is engaged, and the power is transmitted from the input shaft to the output shaft through the in-line clutch, the driving gear assembly and the driven gear, and the rotation direction of the output shaft is opposite to that of the input shaft. When the operating handle is in the reverse position, the forward clutch is disengaged, the reverse clutch is engaged, and the power is transmitted from the input shaft to the output shaft through the transmission shaft, the reverse clutch, the first transmission gear assembly 302 and the driven gear, and the rotation direction of the output shaft is the same as that of the input shaft.

The marine gearbox of the invention is operated hydraulically, the hydraulic controller 501 includes the reversal valve 5017, the working pressure valve 544 lubricates the method 503, when the oil pump works, the engine oil sucks from the oil sump of the container through the coarse strainer 5191 (filter screen assembly), then is sent to the cooler again, one path of engine oil can lead to the cylinder of the clutch 2000 or clutch 2100 of backing through the reversal valve 5017 after cooling and fine filtering, another path overflows from the working pressure valve 544, a part leads to each lubricated position and oil spray lubrication to the engaging flank through the oil spray pipe through the oil hole in input shaft and drive shaft, another part overflows to the oil sump of container through the lubricating valve 503, the lubricating oil pressure can be regulated by the lubricating valve 503. When the product leaves a factory, the pressure is generally adjusted to 0.06-0.45 MPa, and the adjustment is not needed when a user uses the product.

When the diverter valve, 5017, is in the park position, the working 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 in the forward or reverse position, one path of pressure oil is guided to the control end of the working pressure valve through the throttle valve 545, so that the system pressure is increased to 1.4-1.6 Mpa in a delayed manner for 3-5 seconds from the initial pressure state, and meanwhile, the throttle valve 546 is further arranged on the path of pressure oil, so that the clutch is stably and softly engaged due to the delayed pressure increase, and the normal operation of forward and reverse is ensured.

The hydraulic controller 501 of the marine gearbox of the invention can adopt three modes of manual, electric and pneumatic.

When the gear box adopts a manual control valve, a steel wire rope (or other modes) can be used for rotating a control handle to control the gear box to be in a forward, stop and reverse state, and the traction force (thrust and pull force) of the steel wire rope is required to be more than 6 kg. The integrated machine frame is adopted, and when the driver's cab is operated in a long distance, the forward, stop and reverse operation positions of the driver's cab are consistent with the positions of the operation handles of the gear box.

The gear box adopts the electromagnetic valve to control time, the electromagnetic valve is in a three-position five-way form, and the voltage is used: 24v (dc), voltage fluctuation: less than or equal to 15 percent; maximum current: imax ═ 0.94A; two ends of the electromagnetic valve are provided with emergency manual mechanical buttons which are used for the operation beside the machine under the condition of power failure.

And when the gear box is operated by adopting a 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 of 'forward', 'stop' and 'reverse' are arranged, the threads of the hole openings are M14 multiplied by 1.5, when air is introduced into the stop hole and the air is discharged from the other two holes, the pneumatic operating 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 reversing hole according to the installation requirement of a real ship, and when the vehicle is reversed to enter air, the valve rod is shifted to drive the handle to swing leftwards (or rightwards).

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

The oil injection port 504 is further arranged on the box body, the corresponding oil hole of the hydraulic controller 501 is connected to the oil injection port 504 on the box body, the alarm is further arranged on the top of the box body 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, backing work indication and forward work indication, a thermometer 540 and a pressure gauge 539 are further connected to the oil distributor base 502, supports 517 are further arranged on two sides of the box body, hanging rings 516 are arranged on the supports 517, an oil gauge component 515 is further arranged on the box body, and oil drain bolts 518 are arranged on the lower portion of the box body. The top of the upper box body is provided with an inspection window for inspecting parts such as gears, clutches and the like. The oil level gauge on the box body is used for checking the height of the oil level. The movable supports are arranged on two sides of the box body, and the supports with different supporting heights can be replaced according to requirements so as to adapt to matching of different hosts.

As shown in fig. 14 to 16, the housing includes a housing 509 and a box body, the box body includes an upper box body and a lower box body fixed by bolts, the housing 509 includes a first split housing 5091 and a second split housing 5092 which are split to each other in a radial direction, split surfaces of the first split housing 5091 and the second split housing 5092 are further provided with split connecting portions 5094, the first split housing 5091 and the second split housing 5092 are fastened by bolts inserted through the split connecting portions 5094, peripheries of the first split housing 5091 and the second split housing 5092 are further provided with connecting edge portions 5093, and the second split housing 5092 is further provided with connecting holes for fixing with the box body. The first split cover 5091 is further provided with a cover plate 508.

When the gearbox needs to be maintained, all connecting bolts and pins of the first split housing 5091 and the second split housing 5092 are screwed out, all connecting bolts and pins of the upper box body and the lower box body are screwed out, and then the input rear end cover, the transmission shaft rear end cover and the oil pump assembly are detached. And screwing out the connecting bolt of the first split housing 5091 and the upper box body, hanging out the first split housing 5091 and the upper box body in sequence, laying wood pillows and paper pads below the first split housing 5091 and the upper box body to prevent joint surfaces from being damaged, and then hanging out the input shaft component to disassemble and replace the high-elasticity coupler 10 or the rubber toothed sleeve coupler and the second split housing 5092. The assembly sequence is reversed from the disassembly procedure. Compared with the traditional structure gear, the main engine and the stern shaft do not need to be moved in maintenance, the three lines of the gear box do not need to be aligned again, and the maintenance time and the maintenance cost can be greatly saved.

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

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the principle and spirit of the present invention, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims

1. The utility model provides a marine gearbox, 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 pass through gear drive, still be connected with high-elastic shaft coupling (10) or rubber profile of tooth cover coupling on input shaft part (20), control system part (50) set up on the casing, its characterized in that:

the input shaft part (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), the coupling (203) is in interference connection with the conical surface of the input shaft (201), the right-handed transmission gear (204) is in heat-sleeved 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 pressure bearing plate (211),

the clutch shell is arranged at one end of the right-hand transmission gear (204) and is integrally formed with the right-hand transmission gear (204), the clutch seat (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 seat and a clutch shell spline on the right-hand 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 on one end of the clutch seat (205) or the clutch shell 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 conical 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 groove (2043) for the end face key (2032) to insert 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), 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 hot sleeve connection with the transmission shaft (301), the first transmission gear assembly (302) is in meshed transmission with a right-handed transmission gear (204), and the first transmission gear assembly (302) and the second transmission gear assembly (303) synchronously rotate or respectively rotate through the clutch assembly;

the output shaft part (40) comprises an output shaft (401) and a driven gear (402) sleeved on the output shaft (401), one end of the output shaft (401) is supported on the box body through a third tapered roller bearing (404), and the other end of the output shaft (401) is supported on the box body through a second cylindrical 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 seat (502), a lubricating valve (503) and a double-cylinder oil filter (520), the oil distributor seat (502) is fixed at the top of the box body, the oil distributor seat (502) is provided with a plurality of oil holes communicated with the box body, and the hydraulic controller (501), the oil distributor seat (502) and the lubricating valve (503) are respectively fixed on the oil distributor seat (502) and communicated with the corresponding oil holes;

an oil baffle disc (532) is further arranged at the bottom in the box body, a filter screen assembly (519) is arranged at the lower part outside the box body, the filter screen assembly (519) is communicated with the inside of the box body, an oil pump (510) is further fixed on an input shaft rear cover (526) through an oil pump connecting plate (527), an oil pump transmission sleeve (217) is further arranged at one end of the input shaft (201), an oil pump shaft is connected with the end part of the input shaft (201) through the oil pump transmission sleeve (217), a cooler (513) is further arranged at one side of the box body 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 oil from the oil pump (510) passes through a cooler (513) and then enters the hydraulic control unit through a double-cylinder oil filter (520), and is then introduced into each working site after being pressure-regulated and distributed by the hydraulic control unit.

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

3. A marine gearbox according to claim 1, wherein: the one end of box is equipped with input shaft protecgulum (535), input shaft (201) pass input shaft protecgulum (535), and still be equipped with between input shaft (201) and input shaft protecgulum (535) sealing washer (534), dextrorotation drive gear (204) on input shaft (201) support on the box through first tapered roller bearing (213), the other end of box still is equipped with input shaft back cover (526), the other end of input shaft (201) supports on input rear end housing (526) through first cylindrical roller bearing (214).

4. A marine gearbox according to claim 3, wherein: a working oil path (305) and a lubricating oil path (306) are arranged inside the input shaft (201), a second oil inlet (525) is further formed in 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 lubricating oil path (306); the other end is communicated to a control system component (50), a working oil path (305) is communicated to a cylinder of the clutch, and a lubricating oil path (306) is connected to each bearing on the input shaft component (20).

5. A marine gearbox according to claim 1, wherein: the front end of box still is equipped with transmission shaft protecgulum (536), lid (522) behind the rear end of box still is equipped with the transmission shaft, and second transmission gear subassembly (303) of transmission shaft (301) one end pass through the bearing and support on the box, the other end of transmission shaft (301) passes through the bearing and supports on lid (522) behind the transmission shaft.

6. A marine gearbox according to claim 5, wherein: an oil distribution bushing (524) is further arranged between the transmission shaft rear cover (522) and the transmission shaft (301), a working oil path (305) and a lubricating oil path (306) are further arranged inside the transmission shaft (301), the working oil path (305) and the lubricating oil path (306) are communicated with the oil distribution bushing (524), a first oil inlet (304) is further formed in the transmission shaft rear cover (522), one end of the first oil inlet (304) is communicated with the oil distribution bushing (524), the other end of the first oil inlet is communicated to a control system component (50) through an oil path of the box body, the working oil path (305) is communicated to an oil cylinder of the clutch, the lubricating oil path (306) is connected to each bearing on the transmission shaft component (30), and an O-shaped ring (521) is further arranged between the first oil inlet (304) and the box body.

7. A marine gearbox according to claim 1, wherein: 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 split seal cover (5281) and a second split seal cover (5282) which are mutually spliced along the radial direction, connecting parts (5283) are respectively arranged on splicing surfaces of the first split seal cover and the second split seal cover, and the first split seal cover (5281) and the second split seal cover (5282) are fastened through bolts or pins arranged in the connecting parts (5238).

8. A marine gearbox according to claim 7, wherein: the output shaft (401) penetrates through 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 (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 opening oil seal (530).

9. A marine gearbox according to claim 8 wherein: opening oil blanket (530) are equipped with incision (5304), opening oil blanket (530) include skeleton (5302), oil blanket body (5301) and V type ring (5303), skeleton (5302) and V type ring (5303) inlay respectively and establish in the both sides of oil blanket body (5301), and skeleton (5302) are located the outer lane of V type ring (5303).

10. A compact marine gearbox according to claim 1 wherein: still be equipped with lamina tecti (506) on the box, pressure-bearing plate (211) are equipped with the emergent bolt that uses as emergency device, and the bolt is located lamina tecti (506) below.