CN116972155A - Rear axle box lubricating structure - Google Patents

Rear axle box lubricating structure Download PDF

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Publication number
CN116972155A
CN116972155A CN202311127947.4A CN202311127947A CN116972155A CN 116972155 A CN116972155 A CN 116972155A CN 202311127947 A CN202311127947 A CN 202311127947A CN 116972155 A CN116972155 A CN 116972155A
Authority
CN
China
Prior art keywords
oil
gear
bearing
cavity
rear axle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311127947.4A
Other languages
Chinese (zh)
Inventor
夏启翔
程少奇
王磊
杜小义
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changzhou Changfa Agriculture Equipment Engineering Technology Research Co ltd
Jiangsu Changfa Agricultural Equipment Co Ltd
Original Assignee
Changzhou Changfa Agriculture Equipment Engineering Technology Research Co ltd
Jiangsu Changfa Agricultural Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Changzhou Changfa Agriculture Equipment Engineering Technology Research Co ltd, Jiangsu Changfa Agricultural Equipment Co Ltd filed Critical Changzhou Changfa Agriculture Equipment Engineering Technology Research Co ltd
Priority to CN202311127947.4A priority Critical patent/CN116972155A/en
Publication of CN116972155A publication Critical patent/CN116972155A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
    • 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
    • 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
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
    • 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
    • F16H57/0412—Cooling or heating; Control of temperature
    • F16H57/0415—Air cooling or ventilation; Heat exchangers; Thermal insulations
    • F16H57/0417—Heat exchangers adapted or integrated in the gearing
    • 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
    • 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
    • F16H57/045—Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
    • 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
    • F16H57/0457—Splash lubrication
    • 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
    • F16H57/0469—Bearings or seals
    • F16H57/0471—Bearing
    • 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
    • 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
    • F16H57/048—Type of gearings to be lubricated, cooled or heated
    • F16H57/0493—Gearings with spur or bevel gears

Abstract

The application provides a rear axle box lubricating structure which is characterized by comprising a shell, a power output shaft and a bevel gear shaft, wherein the shell comprises a bearing supporting wall, the bearing supporting wall divides the interior of the shell into a first cavity close to the mounting side of a gearbox and a second cavity close to the power output end, an oil storage cavity communicated with the first cavity and the second cavity is arranged in the bearing supporting wall, the power output shaft is arranged in the shell and penetrates through the oil storage cavity and is supported by the bearing supporting wall, and the bevel gear shaft penetrates through the bearing supporting wall and is arranged below the power output shaft. According to the application, the oil storage cavity is arranged in the bearing support wall, the oil inlet which is communicated with the oil storage cavity and the second cavity is arranged on the second side wall, and the oil drain hole which is communicated with the oil storage cavity and the first cavity is arranged on the first side wall, so that the oil vapor and splashed oil in the second cavity can enter the oil storage cavity from the oil inlet to lubricate the first bearing and the second bearing, and can be discharged from the oil drain hole, and the oil can circularly flow.

Description

Rear axle box lubricating structure
Technical Field
The application relates to the technical field of tractors, in particular to a rear axle box lubricating structure.
Background
In the prior art, at present, bearing lubrication of a domestic tractor drive system mainly adopts modes of oil bath lubrication, splash lubrication, pressure oil supply lubrication and the like. For the bearing of the supporting shafting in the transmission system box body, the self lubrication of the bearing can be realized by the lubricating oil and oil foam splashed by the slapping of the rotating piece in the box body; for the semi-closed gear shaft end or the bearing (high horsepower transmission system) embedded in the gear for supporting, the lubricating oil and oil foam splashed by the slapping of the rotating piece in the box body have weak lubricating effect, and cannot play a role in reducing friction and abrasion in the bearing and prolonging the service life of the bearing. Each manufacturer aiming at the situation generally adopts a pressure oil supply lubrication mode to supply oil to the box body for lubrication through an oil pump outside the box body. The way not only can provide lubrication and antifriction for the bearings, but also can provide lubrication and cooling for the corresponding gears and shafting, but the way can greatly reduce the practicality and economy when fewer bearings or gears need to be provided with lubrication.
Accordingly, it is desirable to provide a rear axle housing lubrication structure that overcomes the above-described drawbacks.
Disclosure of Invention
The application aims to provide a rear axle box body lubricating structure.
According to one aspect of the present application, there is provided a rear axle housing lubrication structure comprising:
the bearing support wall divides the interior of the shell into a first cavity close to the mounting side of the gearbox and a second cavity close to the power output end, and an oil storage cavity communicated with the first cavity and the second cavity is arranged in the bearing support wall;
the power output shaft is arranged in the shell, penetrates through the oil storage cavity and is supported by the bearing support wall;
and the bevel gear shaft penetrates through the bearing supporting wall and is arranged below the power output shaft.
Preferably, the bearing support wall comprises a first side wall adjacent to the first chamber and a second side wall adjacent to the second chamber, the oil storage cavity is located between the first side wall and the second side wall and above the bevel gear shaft, and the power output shaft is supported on the first side wall through a first bearing and on the second side wall through a second bearing.
Preferably, an oil inlet communicated with the second cavity is formed in the second side wall, and the oil inlet is located at the upper part of the oil storage cavity and above the second bearing.
Preferably, the first side wall is provided with oil drain holes communicated with the first chamber, and the oil drain holes are distributed on the periphery of the first bearing and are positioned at the lower part of the oil storage cavity.
Preferably, a gear pump installation shell is fixed on one side of the shell, a gear pump for driving oil in the shell to circulate is installed on the gear pump installation shell, a gear transmission pair for driving the gear pump to rotate is arranged on one side of the first cavity, and the gear transmission pair comprises a driving gear installed on the power output shaft, a first idler gear meshed with the driving gear, a second idler gear meshed with the first idler gear and a driven pump gear meshed with the second idler gear and directly driving the gear pump to rotate.
Preferably, a gear mounting seat is arranged on the side, close to the gear pump, of the first chamber, the gear mounting seat extends from the inner wall of the shell to the side, far away from the gear pump, of the gear pump and is arranged at intervals with the bearing supporting wall, the first idler gear is arranged between the gear mounting seat and the bearing supporting wall through a fixed shaft, one end of the fixed shaft is fixedly arranged on the gear mounting seat in a penetrating mode, and the other end of the fixed shaft is fixedly arranged on the bearing supporting wall in a penetrating mode.
Preferably, a differential mechanism is arranged in the second cavity, an annular bevel gear is fixed on the periphery of the differential mechanism, and the bevel gear shaft is driven by a front-end gearbox to rotate, so that the annular bevel gear is driven and the differential mechanism is driven.
Preferably, the outside of casing is equipped with first filter, second filter and relief valve, the below of gear pump and with the casing fixed and with the bottom intercommunication of casing are located to first filter, second filter and relief valve are all fixed with the casing through the support, the gear pump through first pipeline with first filter intercommunication to through second pipeline and second filter intercommunication, the second filter through the third pipeline with the relief valve intercommunication.
Preferably, an oil injection pipe for lubricating the wet clutch at one side of the differential is arranged at the bottom of the second chamber, the oil injection pipe is communicated with the safety valve through a fourth pipeline, the safety valve conveys lubricating oil to a power output assembly at the rear end through a fifth pipeline, and the power output assembly is communicated with a radiator arranged at the top of the shell, the top of the gear pump mounting shell and the top of the first chamber through a sixth pipeline.
Preferably, the bearing support wall is provided with a plurality of air passing holes, the air passing holes are distributed around the bevel gear shaft, the bottom of the bearing support wall is provided with an oil passing port, and the oil passing port is positioned below the bevel gear shaft and extends to the lower surface of the shell.
Compared with the prior art, the rear axle box lubricating structure provided by the application has the following beneficial effects:
due to the adoption of the technical scheme, the bearing support wall has the advantages of simple structure, ingenious design and low cost, and the oil storage cavity is arranged in the bearing support wall, the oil inlet which is communicated with the oil storage cavity and the second cavity is formed in the second side wall, and the oil drain hole which is communicated with the oil storage cavity and the first cavity is formed in the first side wall, so that oil vapor and splashed oil in the second cavity can enter the oil storage cavity from the oil inlet to lubricate the first bearing and the second bearing, and can be discharged from the oil drain hole, and the oil can flow circularly; the oil inlet is obliquely arranged from outside to inside, and the oblique direction is from outside to inside and is inclined from top to bottom, so that oil can conveniently enter the cavity; the oil discharged from the oil discharge hole can splash around along with the rotation of the driving gear, so that the gear transmission pair is lubricated and cooled; the lubricating structure skillfully solves the problem of difficult lubrication of the internal bearing under the condition of strength permission, and simultaneously has the functions of oil storage and oil circuit circulation.
Drawings
The application is described in further detail below with reference to the attached drawings and detailed description:
FIG. 1 is a perspective view of a rear axle housing of the present application;
FIG. 2 is a second perspective view of the rear axle housing of the present application;
FIG. 3 is a front view of the rear axle housing of the present application;
FIG. 4 is a rear view of the rear axle housing of the present application;
FIG. 5 is a cross-sectional view of the rear axle housing of the present application;
FIG. 6 is a second cross-sectional view of the rear axle housing of the present application;
FIG. 7 is a cross-sectional view III of the rear axle housing of the present application;
FIG. 8 is a front view of the present application with the gear set removed;
fig. 9 is a front view of the gear assembly of the present application.
The housing, a1. bearing support wall, a11, first side wall, a111, drain hole, a12, second side wall, a121, oil inlet, a13, blow-through hole, a14, oil port, a2, first chamber, a3., second chamber, a4. oil storage cavity, a5. gear mount, b, stationary shaft, b1. first oil gallery, b2. second oil gallery, c, power output shaft, d, bevel gear shaft, e, gear pump mount housing, f, gear pump, g, gear drive pair, g1. drive gear, g2. first idler gear, g3. second idler gear, g4. passive pump gear, h, first filter, i, second filter, j, safety valve, k, differential, l, annular bevel gear, m, wet clutch, n, power take off assembly, o, p, radiator, 1, first bearing, 2, second bearing, 3, first conduit, 4, second conduit, 5, third conduit, 6, fourth conduit, 7, sixth conduit, 8.
Detailed Description
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
For the sake of simplicity of the drawing, the parts relevant to the present application are shown only schematically in the figures, which do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
In this context, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In addition, in the description of the present application, the terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will explain the specific embodiments of the present application with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the application, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.
Referring to fig. 1 and 2, the present embodiment discloses a rear axle box lubrication structure including a housing a, a power output shaft c, a bevel gear shaft d, a gear pump mounting housing e, a gear pump f, a first filter h, a second filter i, and a relief valve j. The power output shaft c and the bevel gear shaft d are both arranged inside the shell a and are both connected with a gearbox (not shown in the figure) at the front end of the shell a for transmitting the power of the gearbox backwards. The gear pump mounting case e, the gear pump f, the first filter h, the second filter i, and the relief valve j are all mounted outside the case a.
Referring to fig. 3 and 5, a bearing support wall a1 is included in the housing a, the bearing support wall a1 dividing the interior of the housing a into a first chamber a2 near the transmission mounting side and a second chamber a3 near the power output end. An oil storage cavity a4 which is communicated with the first cavity a2 and the second cavity a3 is arranged in the bearing supporting wall a1. The bearing support wall a1 includes a first side wall a11 adjacent to the first chamber a2 and a second side wall a12 adjacent to the second chamber a3. The oil storage chamber a4 is located between the first side wall a11 and the second side wall a12.
Referring to fig. 6 and 8, a power output shaft c is provided in the housing a and passes through the oil storage chamber a4, and is supported on the first side wall a11 by the first bearing 1 and on the second side wall a12 by the second bearing 2. The bevel gear shaft d passes through the bearing supporting wall a1 and is arranged below the power output shaft c, namely the oil storage cavity a4 is positioned above the bevel gear shaft d.
An oil inlet a121 communicated with the second chamber a3 is formed in the second side wall a12, and the oil inlet a121 is located at the upper part of the oil storage cavity a4 and above the second bearing 2. The oil inlet a121 is obliquely arranged from outside to inside, and the oblique direction is from outside to inside, so that oil can conveniently enter the cavity, and the first bearings 1 and the second bearings 2 at two sides are lubricated. The first side wall a11 is provided with oil drain holes a111 communicated with the first chamber a2, the number of the oil drain holes a111 is 2, and the oil drain holes a111 are distributed on two sides of the periphery of the first bearing 1 and are positioned at the lower part of the oil storage cavity a4. When the oil in the oil storage cavity a4 reaches a certain depth, the oil is discharged from the oil discharge hole a111, so that excessive accumulated oil in the oil storage cavity a4 is avoided.
Referring to fig. 2, 3 and 9, a gear pump mounting case e is fixed to a side of the case a, and a gear pump f is mounted on the gear pump mounting case e. The gear pump f is used for driving the oil in the shell a to circulate. The side of the first chamber a2 is provided with a gear transmission pair g for driving the gear pump f to rotate. The gear transmission pair g comprises a driving gear g1 arranged on the power output shaft c, a first idle gear g2 meshed with the driving gear g1, a second idle gear g3 meshed with the first idle gear g2 and a passive pump gear g4 meshed with the second idle gear g3 and directly driving the gear pump f to rotate.
Wherein, the driven pump gear g4 is located gear pump installation shell e for drive gear pump f rotation. The second idler gear g3 is partially located within the gear pump mounting housing e and partially located within the first chamber a2. The first idler gear g2 is located within the first chamber a2. The driving gear g1 rotates in synchronization with the power output shaft c. The gearbox transmits power to a driving gear g1 through a power output shaft c, and the driving gear g1 sequentially transmits power to a gear pump f through a first idler gear g2, a second idler gear g3 and a driven pump gear g4.
The oil discharged from the oil discharge hole a111 splashes around along with the rotation of the driving gear g1, and further lubricates and cools the gear transmission pair g.
Referring to fig. 7, a gear mounting seat a5 is provided in the first chamber a2 near the gear pump f side, and the gear mounting seat a5 extends from the inner wall of the housing a to a side far from the gear pump f and is spaced from the bearing support wall a1. The first idler gear g2 is arranged between the gear mounting seat a5 and the bearing supporting wall a1 through a fixed shaft b. One end of the fixed shaft b is fixedly arranged on the gear mounting seat a5 in a penetrating way, and the other end of the fixed shaft b is fixedly arranged on the bearing supporting wall a1 in a penetrating way.
A first oil passage b1 communicated with the second cavity a3 is axially arranged in the fixed shaft b, and a second oil passage b2 communicated with the first oil passage b1 and the rotating joint of the first idler gear g2 and the fixed shaft b is radially arranged in the fixed shaft b. The oil in the second chamber a3 provides lubrication for the rotation of the first idler gear g2 through the first oil passage b1 and the second oil passage b2.
Referring to fig. 4 and 5, a differential k is disposed in the second chamber a3, a ring bevel gear l is fixed to the periphery of the differential k, and a bevel gear shaft d is rotated by a front end gearbox (not shown), thereby driving the ring bevel gear l and driving the differential k. The rotation of the annular bevel gear l can drive oil at the bottom of the second cavity a3 to splash, so that the splashed oil enters the first oil duct b1 and enters the oil storage cavity a4 through the oil inlet a121 to lubricate various parts and achieve a cooling effect on the parts.
Referring to fig. 1, 2 and 3, a first filter h is provided below the gear pump mounting case e and is fixed to and communicates with the bottom of the case a. The second filter i and the relief valve j are both fixed to the gear pump mounting case e by brackets. The gear pump f communicates with the first filter h through a first pipe 3 and with the second filter i through a second pipe 4. The second filter i communicates with the relief valve j via a third conduit 5.
The bottom of the second chamber a3 is provided with an oil injection pipe o for lubricating the wet clutch m at one side of the differential mechanism k, the oil injection pipe o is communicated with a safety valve j through a fourth pipeline 6, and the safety valve j conveys oil to a power output assembly n at the rear end through a fifth pipeline 7. The power output assembly n is communicated to the top of the first chamber a2, the top of the gear pump mounting shell e and the radiator p through a sixth pipeline 8, and oil return work is carried out. In this embodiment, the sixth pipe 8 is connected to the top of the first chamber a2 and the top of the gear pump mounting case e by a three-way joint, and a pipe opening is separated from the pipe opening to the top of the gear pump mounting case e by a three-way joint to be led to the radiator p.
In a preset safety pressure range, the oil will flow back to the gear pump mounting housing e and the radiator p. The oil liquid flowing back into the gear pump installation shell e is used for lubricating the second idler gear g3 and the gear transmission pair g, and the oil liquid flowing back into the radiator p is cooled by heat dissipation and then continuously flows into the safety valve j for lubricating the wet clutch m and the power output assembly n. When the oil pressure exceeds a preset safety pressure value, a part of the oil flows into the first chamber a2 and lubricates the gear transmission pair g.
The bearing support wall a1 is provided with a plurality of air passing holes a13, and the air passing holes a13 are distributed around the bevel gear shaft d. The bottom of the bearing support wall a1 is provided with an oil passing port a14, and the oil passing port a14 is positioned below the bevel gear shaft d and extends to the lower surface of the shell a. The air passing hole a13 and the oil passing hole a14 simultaneously play a role in weight reduction. The bottom surface of the oil passing port a14 is obliquely arranged from the first chamber a2 to the second chamber a3 from top to bottom, so that oil can flow back conveniently.
The rear axle box body lubricating structure simultaneously lubricates the power output shaft c, the gear transmission pair g, the annular bevel gear l, the power output assembly n and the wet clutch m at one side of the differential mechanism k. The oil vapor and splashed oil in the second chamber a3 enter the oil storage cavity a4 through the oil inlet a121 while lubricating the second bearing 2, so that the first bearing 1 and the second bearing 2 are lubricated at the same time. The wall thickness of the oil storage cavity a4 is uniform, and the oil storage cavity a has the functions of oil storage and temperature reduction while ensuring the reliable structure. After being driven by the driving gear g1, part of oil discharged through the oil discharge hole a111 has a corresponding lubricating effect on the gear transmission pair g and the bearings corresponding to each gear in the gear transmission pair g. The structure can realize the lubrication and cooling functions of the bearing in the shell a, and the oil way can be self-circulated.
It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present application without departing from the spirit and scope of the application. Therefore, it is intended that the present application cover the modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

Claims (10)

1. A rear axle box lubricating structure, characterized by comprising:
the bearing support wall divides the interior of the shell into a first cavity close to the mounting side of the gearbox and a second cavity close to the power output end, and an oil storage cavity communicated with the first cavity and the second cavity is arranged in the bearing support wall;
the power output shaft is arranged in the shell, penetrates through the oil storage cavity and is supported by the bearing support wall;
and the bevel gear shaft penetrates through the bearing supporting wall and is arranged below the power output shaft.
2. The rear axle housing lubrication structure of claim 1, wherein the bearing support wall includes a first side wall adjacent the first chamber and a second side wall adjacent the second chamber, the oil reservoir being located between the first side wall and the second side wall and above the bevel gear shaft, the power take-off shaft being supported on the first side wall by a first bearing and on the second side wall by a second bearing.
3. The rear axle box lubrication structure of claim 2, wherein the second side wall is provided with an oil inlet communicated with the second chamber, and the oil inlet is located at the upper part of the oil storage cavity and above the second bearing.
4. The rear axle box lubrication structure of claim 3, wherein the first side wall is provided with oil drain holes communicated with the first chamber, and the oil drain holes are distributed on the periphery of the first bearing and are positioned at the lower part of the oil storage cavity.
5. The rear axle box lubrication structure of claim 4, wherein a gear pump mounting shell is fixed on one side of the shell, a gear pump for driving oil in the shell to circulate is mounted on the gear pump mounting shell, a gear transmission pair for driving the gear pump to rotate is arranged on one side of the first chamber, and the gear transmission pair comprises a driving gear, a first idler gear meshed with the driving gear, a second idler gear meshed with the first idler gear, and a driven pump gear meshed with the second idler gear and directly driving the gear pump to rotate.
6. The rear axle box lubrication structure of claim 5, wherein a gear mounting seat is arranged on the side, close to the gear pump, in the first chamber, and extends from the inner wall of the housing to the side, far from the gear pump, and is arranged at a distance from the bearing support wall, the first idler gear is arranged between the gear mounting seat and the bearing support wall through a fixed shaft, one end of the fixed shaft is fixedly arranged on the gear mounting seat in a penetrating manner, and the other end of the fixed shaft is fixedly arranged on the bearing support wall in a penetrating manner.
7. The rear axle housing lubrication structure of claim 6, wherein a differential is provided in the second chamber, a ring bevel gear is fixed to the periphery of the differential, and the bevel gear shaft is driven by the front end gearbox to rotate, thereby driving the ring bevel gear and driving the differential.
8. The rear axle housing lubrication structure of claim 7, wherein a first filter, a second filter and a relief valve are provided on the outer side of the housing, the first filter is provided below the gear pump and is fixed to the housing and is communicated with the bottom of the housing, the second filter and the relief valve are both fixed to the housing by a bracket, the gear pump is communicated with the first filter by a first pipe and is communicated with the second filter by a second pipe, and the second filter is communicated with the relief valve by a third pipe.
9. The rear axle housing lubrication structure of claim 8, wherein the bottom of the second chamber is provided with an oil injection pipe that lubricates the wet clutch on one side of the differential, the oil injection pipe is communicated with the relief valve through a fourth pipe, the relief valve delivers lubricating oil to the power take-off assembly at the rear end through a fifth pipe, and the power take-off assembly is communicated to a radiator provided at the top of the housing, the top of the gear pump mounting case, and the top of the first chamber through a sixth pipe.
10. The rear axle box lubrication structure of claim 8, wherein the bearing support wall is provided with a plurality of air passing holes, the air passing holes are distributed around the bevel gear shaft, the bottom of the bearing support wall is provided with an oil passing hole, and the oil passing hole is positioned below the bevel gear shaft and extends to the lower surface of the shell.
CN202311127947.4A 2023-09-02 2023-09-02 Rear axle box lubricating structure Pending CN116972155A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311127947.4A CN116972155A (en) 2023-09-02 2023-09-02 Rear axle box lubricating structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311127947.4A CN116972155A (en) 2023-09-02 2023-09-02 Rear axle box lubricating structure

Publications (1)

Publication Number Publication Date
CN116972155A true CN116972155A (en) 2023-10-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311127947.4A Pending CN116972155A (en) 2023-09-02 2023-09-02 Rear axle box lubricating structure

Country Status (1)

Country Link
CN (1) CN116972155A (en)

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