CN113819228A - AMT gearbox brake force-feed lubrication system - Google Patents
AMT gearbox brake force-feed lubrication system Download PDFInfo
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- CN113819228A CN113819228A CN202111082057.7A CN202111082057A CN113819228A CN 113819228 A CN113819228 A CN 113819228A CN 202111082057 A CN202111082057 A CN 202111082057A CN 113819228 A CN113819228 A CN 113819228A
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- 238000005461 lubrication Methods 0.000 title claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims description 22
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 175
- 239000010687 lubricating oil Substances 0.000 abstract description 26
- 238000001816 cooling Methods 0.000 abstract description 14
- 238000013461 design Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0402—Cleaning of lubricants, e.g. filters or magnets
- F16H57/0404—Lubricant filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
- F16H57/0423—Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0441—Arrangements of pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0456—Lubrication by injection; Injection nozzles or tubes therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0467—Elements of gearings to be lubricated, cooled or heated
- F16H57/0473—Friction devices, e.g. clutches or brakes
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention discloses a forced lubrication system for an AMT gearbox brake, belonging to the technical field of gearbox brake lubrication, and comprising a main shaft, a first auxiliary shaft and a second auxiliary shaft; the front ends of the first auxiliary shaft and the second auxiliary shaft are respectively provided with a brake and an oil pump; the inlet end of the oil pump is connected with an oil pipe arranged in the inner cavity of the gearbox shell, and the outlet end of the oil pump is communicated with the inner cavity of the brake through an oil outlet pipe of the oil pump; the inner cavity of the brake is communicated with the inner cavity of the gearbox shell through an oil return hole. The second auxiliary shaft drives the oil pump to operate, the oil pipe sucks lubricating oil in the inner cavity of the gearbox shell, the lubricating oil is injected into the inner cavity of the brake through the oil outlet pipe of the oil pump, friction plates and braking plates in the brake are well lubricated and cooled, the lubricating oil flows back into the inner cavity of the gearbox shell through the oil return hole, good lubrication and cooling of the brake are achieved, and the service performance and the service life of the brake are guaranteed. The whole structure is simple and compact, the design is reasonable and reliable, the cost is low, the investment is less, and the practicability is good.
Description
Technical Field
The invention belongs to the technical field of lubrication of a gearbox brake, and particularly relates to a forced lubrication system for an AMT gearbox brake.
Background
An automatic transmission is a transmission device that can automatically perform an automatic shift operation in accordance with a vehicle speed and an engine speed, which occurs in contrast to a manual transmission. AT present, four types of automatic transmissions for automobiles are common, namely a hydraulic Automatic Transmission (AT), a mechanical stepless automatic transmission (CVT), an electric control mechanical automatic transmission (AMT) and a double-clutch automatic transmission.
The AMT gearbox is widely applied by virtue of the characteristics of comfortable driving, higher reliability and more economical oil consumption, however, the performance and the service life of a brake on the AMT gearbox become bottlenecks which restrict the development of the AMT gearbox.
The main factor influencing the performance and service life of the brake on the AMT gearbox is that the internal lubrication and cooling effects of the brake are not ideal, so that the brake pad and the friction plate are abraded too fast.
Disclosure of Invention
In order to solve the problems, the invention provides a forced lubrication system for an AMT gearbox brake, which can perform forced lubrication and cooling on the brake in the gearbox, and ensure the service performance and the service life of the brake.
The invention is realized by the following technical scheme:
a forced lubrication system for an AMT gearbox brake comprises a main shaft, a first auxiliary shaft and a second auxiliary shaft which are arranged in a gearbox shell, wherein the first auxiliary shaft and the second auxiliary shaft are respectively in transmission connection with the main shaft; the front ends of the first auxiliary shaft and the second auxiliary shaft are respectively provided with a brake and an oil pump; the oil pump is powered by the second countershaft; the inlet end of the oil pump is connected with an oil pipe arranged in the inner cavity of the gearbox shell, and the outlet end of the oil pump is communicated with the inner cavity of the brake through an oil outlet pipe of the oil pump; the inner cavity of the brake is communicated with the inner cavity of the gearbox shell through an oil return hole. The second auxiliary shaft drives the oil pump to operate, the oil pump sequentially absorbs lubricating oil in the inner cavity of the gearbox shell through the oil pipe, the lubricating oil is injected into the inner cavity of the brake through the oil pump outlet pipe, friction plates and braking plates in the brake are well lubricated and cooled, the lubricating oil flows back into the inner cavity of the gearbox shell through the oil return hole, good lubrication and cooling of the brake are achieved, and the using performance and the service life of the brake are guaranteed.
The invention further improves that the gearbox shell comprises a gearbox front shell and a gearbox middle shell which are fixedly connected; the main shaft, the first auxiliary shaft and the second auxiliary shaft are rotatably arranged on the front shell of the gearbox through bearings respectively; the oil pump and the brake are fixedly installed on one side, far away from the middle shell of the gearbox, of the front shell of the gearbox respectively. The convenience of disassembly, assembly and maintenance of the oil pump and the brake is ensured; the original bearing cover at the end part of the second auxiliary shaft is replaced by the oil pump, so that the sealing function can be realized, and the power for forcibly supplying oil can be provided.
The invention is further improved in that the oil pipe comprises an oil inlet pipe and an oil suction pipe of the oil pump, which are connected with the inlet end of the oil pump; the gearbox front shell is provided with a through hole communicated with the oil suction pipe, and one end of the oil inlet pipe of the oil pump, which is far away from the oil pump, is communicated with the through hole. The oil suction pipe is integrally arranged in the inner cavity of the gearbox shell, and the oil inlet pipe of the oil pump is arranged outside the inner cavity of the gearbox shell, so that the convenience of disassembly, assembly and maintenance is ensured.
The invention further improves that one end of the oil suction pipe, which is far away from the oil inlet pipe of the oil pump, is provided with a filter. The filter is used as an oil suction port to filter lubricating oil in the gearbox shell, so that impurities are prevented from entering the brake to damage the brake.
The invention is further improved in that an oil duct for communicating the oil outlet pipe of the oil pump with the inner cavity of the brake is arranged on the brake bearing cover of the brake; and an oil spray hole is formed in one end, close to the inner cavity of the brake, of the oil duct, and a chamfer is formed in the outer edge of the outlet end of the oil spray hole in an inverted mode. The oil is pressurized through the oil injection hole, the injection range of the friction plate and the brake plate is enlarged through the chamfer, and good lubrication and reliable cooling of the brake plate and the friction plate are guaranteed.
The invention is further improved in that a brake bearing cover of the brake is provided with a bearing cover oil return hole communicated with the inner cavity of the brake; and a front shell oil return hole corresponding to the bearing cover oil return hole is formed in the front shell of the gearbox. Lubricating oil which lubricates and cools the brake disc and the friction plate in the brake flows back to the inner cavity of the gearbox shell through the oil return hole of the bearing cover and the oil return hole of the front shell, so that the closed circulation of the lubricating oil is realized.
The invention is further improved in that two ends of the oil inlet pipe of the oil pump and two ends of the oil outlet pipe of the oil pump are respectively provided with a joint; the joint comprises a connecting piece and a hollow bolt penetrating through the connecting piece; a connecting piece cavity wrapping the hollow bolt outer ring is formed in the connecting piece, and the connecting piece cavity is communicated with a corresponding pipeline; the circumferential wall of the hollow bolt is provided with an oil passing hole communicated with the internal channel. The hollow bolts are screwed in the corresponding connecting holes, and the oil passages are communicated through the channels, the oil passing holes and the connecting piece cavities in the hollow bolts, so that good oil passage communication and circulation are ensured, and the convenience in disassembly, assembly and maintenance of the oil inlet pipe and the oil outlet pipe of the oil pump is realized.
In addition, the oil passing holes are annularly arranged on the circumferential wall of the hollow bolt at intervals, and the oil passing holes are arranged in a staggered mode in the axial direction of the hollow bolt. The uniformity and the smoothness of the oil flowing to the cavity of the connecting piece through the oil passing hole are ensured, and the shielding of the oil passing hole when the hollow bolt is screwed in or out is avoided.
The invention is further improved in that the hollow bolt is sleeved with washers attached to two sides of the connecting piece. Good sealing performance is realized through the gasket, and oil leakage is prevented.
According to the technical scheme, the invention has the beneficial effects that:
the second auxiliary shaft rotates to provide power for the oil pump, lubricating oil is filtered by the filter and then is sucked into the oil pump through the oil suction pipe and the oil pump oil inlet pipe in sequence to be pressurized, the lubricating oil sequentially passes through the oil outlet pipe of the oil pump and an oil duct on a bearing cover of the brake and is sprayed to the middle parts of the brake disc and the friction disc through the oil spraying holes with the reduced diameters, the lubricating oil is centrifugally diffused outwards through a gap between the brake disc and the friction disc and a groove on the friction disc, and the brake disc and the friction disc are lubricated and cooled; the oil return hole of the bearing cover and the oil return hole of the front shell on the outer edge flow back to the inner cavity of the gearbox shell, so that the closed circulation of lubricating oil is realized, and good lubricating and cooling effects on the brake are ensured.
The AMT gearbox has the advantages of simple and compact integral structure, reasonable and reliable design, low manufacturing cost and less investment, and can utilize the oil in the gearbox to form closed circulation to provide lubrication and finish cooling work for the brake on the gearbox through the system, so that the integral performance and the service life of the AMT gearbox are improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a rear structure view of the embodiment of the present invention.
Fig. 3 is a schematic structural diagram of the transmission case of fig. 1 with a front shell removed.
Fig. 4 is a schematic structural view of the transmission case of fig. 3 with a casing removed.
Fig. 5 is a schematic view of the internal structure of the brake according to the embodiment of the present invention.
FIG. 6 is a schematic diagram of a structure of an oil gallery of a bearing cap according to an embodiment of the present invention.
Fig. 7 is a schematic diagram of a front housing oil return hole structure according to an embodiment of the present invention.
Fig. 8 is a schematic view of a joint structure according to an embodiment of the present invention.
Fig. 9 is a schematic structural view of a hollow bolt according to an embodiment of the present invention.
Fig. 10 is a schematic view of a connector structure according to an embodiment of the present invention.
In the drawings: 1. the transmission comprises a transmission front shell, 2, a transmission middle shell, 3, a main shaft, 4, a first auxiliary shaft, 41, a bearing, 5, a second auxiliary shaft, 6, a brake, 61, a brake bearing cover, 62, an end cover, 63, a pressure plate, 64, a brake disc, 65, a friction plate, 66, an oil injection hole, 67, a brake disc positioning hole, 68, a bearing cover oil return hole, 7, an oil suction pipe, 71, a filter, 8, an oil pump oil inlet pipe, 9, an oil pump, 10, an oil pump oil outlet pipe, 11, a connecting piece, 111, a connecting piece cavity, 12, a hollow bolt, 121, an oil passing hole, 13, a gasket, 14 and a front shell oil return hole.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the present embodiment, and it is apparent that the embodiments described below are only a part of embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of protection of this patent.
As shown in fig. 1-4, the invention discloses a forced lubrication system for an AMT gearbox brake, comprising a main shaft 3, a first auxiliary shaft 4 and a second auxiliary shaft 5 which are installed in a gearbox shell, wherein the first auxiliary shaft 4 and the second auxiliary shaft 5 are respectively in transmission connection with the main shaft 3 through a clutch gear; the front ends of the first auxiliary shaft 4 and the second auxiliary shaft 5 are respectively provided with a brake 6 and an oil pump 9; a rotor handle of the oil pump 9 is in clearance fit connection with a groove at the front end of the second auxiliary shaft 5, and the oil pump 9 provides power through the second auxiliary shaft 5; the inlet end of the oil pump 9 is connected with an oil pipe arranged at the bottom of the inner cavity of the gearbox shell, and the outlet end of the oil pump 9 is communicated with the inner cavity of the brake 6 through an oil pump outlet pipe 10; and the inner cavity of the brake 6 is communicated with the inner cavity of the gearbox shell through an oil return hole.
The second auxiliary shaft 5 is arranged opposite to the first auxiliary shaft 4, namely arranged at two sides of the main shaft 3, and the three shafts are on the same plane so as to balance the rotational stress of the main shaft 3.
As shown in fig. 1-2, the transmission housing comprises a transmission front shell 1 and a transmission middle shell 2 which are fixedly connected; the main shaft 3, the first auxiliary shaft 4 and the second auxiliary shaft 5 are rotatably mounted on the front gearbox shell 1 through bearings respectively; the oil pump 9 and the brake 6 are respectively and fixedly and hermetically mounted with the front side of the front gearbox shell 1. The convenience of disassembly, assembly and maintenance of the oil pump 9 and the brake 6 is ensured; the original bearing cover at the end part of the second auxiliary shaft 5 is replaced by the oil pump 9, so that the sealing function can be realized, and the power of forced oil supply can be provided.
As shown in fig. 5-6, a brake bearing cover 61 on the brake 6 is rotatably mounted with the first secondary shaft 4 through a bearing 41, an end cover 62 of the brake 6 is connected with the brake bearing cover 61 in a sealing manner, a space for accommodating a pressure plate 63, a brake plate 64 and a friction plate 65 is formed between the end cover 62 and the brake bearing cover 61, the brake plate 64 and the friction plate 65 are arranged at intervals, a brake plate positioning hole 67 is formed in the brake bearing cover 61, a notch corresponding to the brake plate positioning hole 67 is formed in the edge of the brake plate 64, the brake plate positioning hole 67 and the notch are inserted and positioned through a positioning pin, the brake plate 64 is positioned and mounted, and the friction plate 65 is connected with the first secondary shaft 4; the pressure plate 63 is driven by air pressure to press the friction plate 65 and the brake plate 64, so that the first countershaft 4 is braked, and the pressure plate 63 is reset by a spring.
As shown in fig. 1-4, the oil pipe includes an oil inlet pipe 8 connected to an inlet end of the oil pump 9 and an oil suction pipe 7 disposed at the bottom of the inner cavity of the transmission housing; the gearbox front shell 1 is provided with a through hole communicated with the oil suction pipe 7, and one end of the oil pump oil inlet pipe 8, which is far away from the oil pump 9, is communicated with the through hole. The oil suction pipe 7 is integrally arranged in the inner cavity of the gearbox shell, and the oil pump oil inlet pipe 8 is arranged outside the inner cavity of the gearbox shell, so that the convenience of disassembly, assembly and maintenance is guaranteed.
The oil suction pipe 7 is mounted at the bottom of the inner cavity of the gearbox shell through a positioning buckle. The firmness of the positioning and the installation of the oil suction pipe 7 is ensured, and the influence of looseness on a transmission part is avoided.
As shown in fig. 3-4, a filter 71 is disposed at an end of the oil suction pipe 7 away from the oil inlet pipe 8 of the oil pump, and the filter 71 is disposed at a rear position of the inner cavity of the transmission housing. The filter 71 is used as an oil suction port to filter lubricating oil in the gearbox shell, so that impurities are prevented from entering the brake 6 to damage the brake 6, and the service life of the brake 6 is ensured; and the lubricating oil of the inner cavity of the gearbox shell is generally slightly lower than the middle position, so that the lubricating oil can also ensure effective oil absorption even under the working condition of a certain gradient, avoid air suction and ensure the reliability of lubrication and cooling of the brake 6.
As shown in fig. 5-6, the brake bearing cover 61 is provided with an oil passage for communicating the oil pump outlet pipe 10 with the inner cavity of the brake 6; one end of the oil duct, which is close to the inner cavity of the brake 6, is provided with a reducing oil injection hole 66, and the outer edge of the outlet end of the oil injection hole 66 is chamfered. The oil is pressurized through the reduced oil injection hole 66, the injection range of the friction plate 65 and the brake plate 64 is enlarged through chamfering, good lubrication and reliable cooling of the brake plate 64 and the friction plate 65 are guaranteed, and the service performance and the service life of the brake 6 are guaranteed.
As shown in fig. 6-7, a bearing cover oil return hole 68 communicating with the inner cavity of the brake 6 is formed in the brake bearing cover 61; the gearbox front shell 1 is provided with a front shell oil return hole 14 corresponding to the bearing cover oil return hole 68. Lubricating oil which lubricates and cools a brake pad 64 and a friction plate 65 in the brake 6 flows back to the inner cavity of the gearbox shell through a bearing cover oil return hole 68 and a front shell oil return hole 14, so that closed circulation of the lubricating oil is realized.
As shown in fig. 6, the friction plate 65 is provided with a radial groove. The lubricating oil sprayed from the middle part is thrown out under the action of the rotating centrifugal force through the grooves on the friction plate 65 and flows back through the bearing cover oil return hole 68 on the outer edge; and the lubricating and cooling ranges and effects of the lubricating oil can be effectively increased.
The lubricating and cooling processes of the brake 6 by the lubricating oil are as follows: the second auxiliary shaft 5 rotates to provide power for the oil pump 9, lubricating oil is filtered by the filter 71 and then sequentially sucked into the oil pump 9 through the oil suction pipe 7 and the oil pump oil inlet pipe 8 to be pressurized, the lubricating oil sequentially passes through the oil outlet pipe 10 of the oil pump and oil passages on the bearing cover 61 of the brake and is sprayed to the middle parts of the brake pad 64 and the friction plate 65 through the oil spraying hole 66 with the diameter reduced, the lubricating oil is centrifugally diffused outwards through a gap between the brake pad 64 and the friction plate 65 and a groove on the friction plate 65, and lubrication and cooling of the brake pad 64 and the friction plate 65 are realized; and the lubricating oil flows back to the inner cavity of the gearbox shell through the bearing cover oil return hole 68 on the outer edge and the front shell oil return hole 14, so that the closed circulation of the lubricating oil is realized, and the good lubricating and cooling effects on the brake 6 are ensured.
As shown in fig. 4, 8, 9 and 10, two ends of the oil inlet pipe 8 of the oil pump and two ends of the oil outlet pipe 10 of the oil pump are respectively provided with a joint; the joint comprises a connecting piece 11 communicated with a corresponding pipeline and a hollow bolt 12 penetrating through the connecting piece 11; a connecting piece cavity 111 wrapping the outer ring of the hollow bolt 12 is formed in the connecting piece 11, the size of the connecting piece cavity 111 is larger than the diameter of the outer ring of the hollow bolt 12, and the connecting piece cavity 111 is communicated with a corresponding pipeline; an oil passing hole 121 is formed in the circumferential wall of the hollow bolt 12, and the oil passing hole 121 is communicated with the inner channel of the hollow bolt 12 and the connecting piece cavity 111. The hollow bolts 12 are screwed in the corresponding connecting holes (the inlet and outlet of the oil pump 9, the oil port opening of the brake bearing cover 61 and the through hole of the front gearbox shell 1), and the oil passages are communicated through the channels in the hollow bolts 12, the oil passing holes 121 and the connecting piece cavity 111, so that good oil passage communication and circulation are ensured, and the convenience of dismounting and maintaining the oil inlet pipe 8 and the oil outlet pipe 10 of the oil pump is realized.
As shown in fig. 9, a plurality of oil passing holes 121 are circumferentially spaced on the circumferential wall of the hollow bolt 12, and the plurality of oil passing holes 121 are arranged in a staggered manner in the axial direction of the hollow bolt 12. The uniformity and smoothness of oil flowing to the connecting piece cavity 111 through the oil passing hole 121 are ensured, and the oil passing hole 121 is prevented from being shielded when the hollow bolt 12 is screwed in or out.
As shown in fig. 8, the hollow bolt 12 is sleeved with a gasket 13 made of rubber and attached to two sides of the connecting member 11. Good sealing performance is achieved by the gasket 13, preventing leakage of oil.
The AMT gearbox brake forced lubrication system has the advantages of simple and compact structure, reasonable and reliable design, low manufacturing cost and less investment, and can utilize the oil in the gearbox to form closed circulation to provide lubrication and finish cooling work for the brake on the gearbox through the system, thereby improving the overall performance and the service life of the AMT gearbox.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The terms "upper", "lower", "outside", "inside" and the like in the description and claims of the present invention and the above drawings are used for distinguishing relative positions if any, and are not necessarily given qualitatively. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The AMT gearbox brake forced lubrication system is characterized by comprising a main shaft (3), a first auxiliary shaft (4) and a second auxiliary shaft (5) which are arranged in a gearbox shell, wherein the first auxiliary shaft (4) and the second auxiliary shaft (5) are respectively in transmission connection with the main shaft (3); the front ends of the first auxiliary shaft (4) and the second auxiliary shaft (5) are respectively provided with a brake (6) and an oil pump (9); the oil pump (9) is powered by the second countershaft (5); the inlet end of the oil pump (9) is connected with an oil pipe arranged in the inner cavity of the gearbox shell, and the outlet end of the oil pump (9) is communicated with the inner cavity of the brake (6) through an oil pump outlet pipe (10); and the inner cavity of the brake (6) is communicated with the inner cavity of the gearbox shell through an oil return hole.
2. AMT gearbox brake positive lubrication system according to claim 1, characterised in that the gearbox housing comprises a fixedly connected gearbox front shell (1) and a gearbox middle shell (2); the main shaft (3), the first auxiliary shaft (4) and the second auxiliary shaft (5) are rotatably mounted on the front gearbox shell (1) through bearings respectively; the oil pump (9) and the brake (6) are fixedly installed on one side, far away from the gearbox middle shell (2), of the gearbox front shell (1) respectively.
3. The AMT gearbox brake positive lubrication system according to claim 2, wherein the oil pipe comprises an oil pump inlet pipe (8) and an oil suction pipe (7) connected with the inlet end of the oil pump (9); the gearbox front shell (1) is provided with a through hole communicated with the oil suction pipe (7), and one end, far away from the oil pump (9), of the oil pump oil inlet pipe (8) is communicated with the through hole.
4. AMT gearbox brake positive lubrication system according to claim 3, characterised in that the end of the oil suction pipe (7) remote from the oil pump inlet pipe (8) is provided with a filter (71).
5. The AMT gearbox brake forced lubrication system according to claim 1, wherein an oil channel for communicating the oil pump oil outlet pipe (10) and the inner cavity of the brake (6) is formed on a brake bearing cover (61) of the brake (6); and an oil injection hole (66) is formed in one end, close to the inner cavity of the brake (6), of the oil duct, and a chamfer is formed in the outer edge of the outlet end of the oil injection hole (66).
6. The AMT gearbox brake forced lubrication system according to claim 2, wherein a brake bearing cover (61) of said brake (6) is provided with a bearing cover oil return hole (68) communicating with an inner cavity of said brake (6); and a front shell oil return hole (14) corresponding to the bearing cover oil return hole (68) is formed in the gearbox front shell (1).
7. The AMT gearbox brake forced lubrication system according to claim 3, wherein two ends of said oil pump oil inlet pipe (8) and two ends of said oil pump oil outlet pipe (10) are respectively provided with a joint; the joint comprises a connecting piece (11) and a hollow bolt (12) penetrating through the connecting piece (11); a connecting piece cavity (111) wrapping the outer ring of the hollow bolt (12) is formed in the connecting piece (11), and the connecting piece cavity (111) is communicated with a corresponding pipeline; the circumferential wall of the hollow bolt (12) is provided with an oil passing hole (121) communicated with the internal channel.
8. The AMT gearbox brake forced lubrication system according to claim 7, wherein a plurality of oil passing holes (121) are arranged on the circumferential wall of the hollow bolt (12) at annular intervals, and a plurality of oil passing holes (121) are arranged in a staggered mode in the axial direction of the hollow bolt (12).
9. AMT gearbox brake force-lubricating system according to claim 7, characterised in that said hollow bolt (12) is sleeved with washers (13) engaging with both sides of said connecting piece (11).
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| CN202111082057.7A CN113819228A (en) | 2021-09-15 | 2021-09-15 | AMT gearbox brake force-feed lubrication system |
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| CN202111082057.7A CN113819228A (en) | 2021-09-15 | 2021-09-15 | AMT gearbox brake force-feed lubrication system |
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| CN113819228A true CN113819228A (en) | 2021-12-21 |
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| CN202111082057.7A Pending CN113819228A (en) | 2021-09-15 | 2021-09-15 | AMT gearbox brake force-feed lubrication system |
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