CN107289115B - In-wheel drive assembly - Google Patents
In-wheel drive assembly Download PDFInfo
- Publication number
- CN107289115B CN107289115B CN201610202726.2A CN201610202726A CN107289115B CN 107289115 B CN107289115 B CN 107289115B CN 201610202726 A CN201610202726 A CN 201610202726A CN 107289115 B CN107289115 B CN 107289115B
- Authority
- CN
- China
- Prior art keywords
- oil
- hole
- drive assembly
- wheel drive
- cover plate
- 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.)
- Active
Links
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 73
- 238000007599 discharging Methods 0.000 claims abstract description 14
- 230000000670 limiting effect Effects 0.000 claims abstract description 5
- 239000003921 oil Substances 0.000 claims description 260
- 239000010687 lubricating oil Substances 0.000 claims description 80
- 238000007789 sealing Methods 0.000 claims description 51
- 239000000945 filler Substances 0.000 claims description 35
- 239000000314 lubricant Substances 0.000 claims description 12
- 230000000007 visual effect Effects 0.000 claims description 5
- 230000009467 reduction Effects 0.000 description 15
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 238000012545 processing Methods 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- F16H57/042—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
- F16H57/0424—Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
An in-wheel drive assembly comprising: the annular shell comprises an annular main body part and a flange part, the flange part divides the space surrounded by the main body part into a speed reducer cavity and a motor cavity, and the speed reducer cavity is positioned on the radial inner side of the motor cavity; the annular oil groove is arranged on the flange part and surrounds the central axis of the shell, the oil groove is positioned on the radial outer side of the speed reducer cavity, and the opening of the oil groove is back to the axial other end of the main body part in the axial direction; the oil filling hole and the oil discharging hole are arranged on the flange part, are radially positioned between the oil groove and the speed reducer cavity and are communicated with the oil groove and the speed reducer cavity; the in-wheel drive assembly further comprises: the annular cover plate is arranged opposite to the opening of the oil groove along the axial direction, and the cover plate is fixed with the flange part; the exhaust hole is arranged on the cover plate and communicated with the oil groove; and the exhaust check valve is arranged in the exhaust hole and used for unidirectionally limiting air to be exhausted from the oil tank to the atmosphere. The technical scheme of the invention improves the efficiency and the performance of the in-wheel driving assembly.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to an in-wheel drive assembly.
Background
The electric automobile is a vehicle which takes a vehicle-mounted power supply as power and drives wheels by a motor to run, and comprises an In Wheel Drive assembly (IWD) for driving and braking the wheels, wherein the In Wheel Drive assembly integrates power, a transmission device and a braking device, so that the mechanical part of the electric automobile is greatly simplified.
The known in-wheel drive assembly comprises an annular housing located within the hub of the wheel, the housing comprising an annular body portion extending in an axial direction and an annular rim portion fixed to an axial end of the body portion radially inwardly of the body portion. The flange part divides the space surrounded by the main body part into a speed reducer cavity and a motor cavity along the radial direction, and the speed reducer cavity is positioned on the radial inner side of the motor cavity.
The edge blocking part is provided with an annular oil groove which is sunken along the axial direction, the oil groove surrounds the central axis of the shell and is positioned on the radial outer side of the speed reducer cavity, and the opening of the oil groove is back to the axial other end of the main body part in the axial direction. The edge blocking part is provided with an oil filling hole, an oil discharging hole and an exhaust hole which are radially positioned between the oil groove and the speed reducer cavity, and the oil filling hole, the oil discharging hole and the exhaust hole are circumferentially distributed at intervals and are communicated with the oil groove and the speed reducer cavity. The oil filler point, the oil drain hole and the exhaust hole are all obliquely arranged with the central axis of the shell. Wherein, oil filler point, oil drain hole are the screw hole to all with a bolt screw-thread fit, block up oil filler point, oil drain hole.
However, the above-described conventional in-wheel drive assembly has the following disadvantages:
1. the in-wheel drive assembly is inefficient and has poor performance.
2. Oil filler point, oil drain hole, exhaust hole processing difficulty, and the assembly difficulty of oil filler point, oil drain hole and bolt.
3. Maintenance of the lubricating oil in the housing is inconvenient.
Disclosure of Invention
One of the problems to be solved by the present invention is: the existing in-wheel drive assemblies are inefficient and have poor performance.
The second problem to be solved by the invention is: in the existing wheel inner drive assembly, an oil filling hole, an oil discharging hole and an exhaust hole on an outer shell are difficult to process, and the oil filling hole, the oil discharging hole and a bolt are difficult to assemble.
The third problem to be solved by the invention is: the conventional in-wheel drive assembly is inconvenient for maintaining lubricating oil in the shell.
To solve the above problems, the present invention provides an in-wheel drive assembly including: the annular shell comprises an annular main body part extending along the axial direction and an annular flange part fixed on the radial inner side of the main body part and one axial end of the main body part, the flange part divides a space surrounded by the main body part into a speed reducer cavity and a motor cavity, and the speed reducer cavity is positioned on the radial inner side of the motor cavity; the annular oil groove is arranged on the flange part and surrounds the central axis of the shell, the oil groove is positioned on the radial outer side of the speed reducer cavity, and an opening of the oil groove is opposite to the axial other end of the main body part in the axial direction; the oil filling hole and the oil discharging hole are arranged on the flange part, are radially positioned between the oil groove and the speed reducer cavity and are communicated with the oil groove and the speed reducer cavity; the annular cover plate is arranged opposite to the opening of the oil groove along the axial direction, and the cover plate is fixed with the flange part; the exhaust hole is formed in the cover plate and communicated with the oil groove; and the exhaust check valve is arranged in the exhaust hole and used for unidirectionally limiting air to be exhausted from the oil groove to the atmosphere.
Optionally, at least one of the oil filling hole and the oil drain hole is a smooth hole.
Optionally, at least one of the oil filler holes and the oil drain holes is more than two, and all the oil filler holes and the oil drain holes are circumferentially arranged at intervals.
Optionally, the cover plate is a visual cover plate, and the oil level height of the lubricating oil in the oil groove can be observed through the cover plate.
Optionally, the surface of the cover plate facing away from the housing in the axial direction is provided with a plurality of scale marks, and the scale marks are used for representing the oil amount of the lubricating oil in the housing.
Optionally, the visual cover plate is a transparent cover plate from which the color of the lubricating oil in the oil groove can be observed.
Optionally, the cover plate is detachably and fixedly connected with the flange part; and/or the presence of a gas in the gas,
the cover plate is provided with a sealing through hole communicated with the oil groove, and a detachable sealing plug is arranged in the sealing through hole;
when the in-wheel drive assembly is mounted on the automobile and the sealing plug is taken down from the cover plate, the lubricating oil in the shell is discharged through the oil discharge hole, the oil groove and the sealing through hole in sequence.
Optionally, the detachable fixed connection is a bolt connection, the sealing plug is a bolt, and the bolt is in threaded fit with the sealing through hole.
Optionally, the sealing through holes and the exhaust holes are arranged at 180-degree intervals in the circumferential direction of the in-wheel drive assembly.
Optionally, the exhaust hole and the oil drain hole are arranged at an interval of 180 degrees in the circumferential direction of the in-wheel drive assembly.
Optionally, the vent hole and the oil filling hole are arranged at intervals in the circumferential direction of the in-wheel drive assembly.
Compared with the prior art, the technical scheme of the invention has the following advantages:
drive assembly during operation in the wheel, lubricating oil in the reduction gear intracavity can be thrown away to the oil groove from the oil filler point under the drive of reduction gear in, under the limited action of apron, lubricating oil in the oil groove can not reveal, and can flow downwards in the oil groove under self action of gravity, then flow back to the reduction gear intracavity via the oil drain hole, thereby realized the recovery of reduction gear intracavity lubricating oil, avoided reduction of reduction gear intracavity lubricating oil and because of a series of problems that lubricating oil reduces and leads to, thereby the efficiency and the performance of drive assembly in the wheel have been improved.
Further, at least one of the oil filling hole and the oil discharge hole is a smooth hole. The machining of the unthreaded hole is simpler than that of a threaded hole. In addition, the oil injection hole and the oil discharge hole are not required to be in threaded fit with the bolt, so that the problem that the oil injection hole, the oil discharge hole and the bolt are difficult to assemble in the conventional wheel inner driving assembly is solved.
Further, the apron is visual apron, and the oil level height of lubricating oil in the oil groove can be observed to the apron, when highly judging the oil mass in the shell according to this oil level when not enough, can in time supply lubricating oil in to the shell, makes things convenient for the maintenance of lubricating oil in the shell very much.
Drawings
Fig. 1 is a perspective view of an in-wheel drive assembly of an embodiment of the present invention as seen in a vehicle width direction when the in-wheel drive assembly is mounted to a vehicle, in which a broken line shows a non-visible structure;
fig. 2 is a cross-sectional view taken along a-a of fig. 1, with the central axis of the outer casing of the in-wheel drive assembly located on a cross-sectional plane of the cross-sectional view.
Detailed Description
As previously mentioned, the existing in-wheel drive assembly suffers from the following disadvantages: 1. the in-wheel drive assembly is inefficient and has poor performance. 2. Oil filler point, oil drain hole, exhaust hole processing difficulty, and the assembly difficulty of oil filler point, oil drain hole and bolt. 3. Maintenance of the lubricating oil in the housing is inconvenient.
The research shows that the reasons for the low efficiency and poor performance of the in-wheel drive assembly are as follows: lubricating oil in the cavity of the speed reducer is easy to throw out to the exhaust hole and throw out of the shell from the exhaust hole, so that the oil quantity in the cavity of the speed reducer is reduced. On the other hand, if the oil amount in the cavity of the speed reducer is reduced, on one hand, lubrication of each component in the speed reducer is easy to be insufficient, so that the efficiency of the speed reducer is reduced, the performance is deteriorated, and on the other hand, the temperature of the motor is increased due to insufficient cooling. Once the temperature of the motor rises, the output torque and power of the motor are reduced, the efficiency of the motor is reduced, and the performance is deteriorated. For example, when the speed reducer is operated at a high speed, the lubricating oil in the speed reducer chamber is easily thrown out by the speed reducer so that the above problem is more significant. For example, when the automobile is in a climbing condition, the exhaust hole is close to the liquid level of the lubricating oil, the lubricating oil in the cavity of the speed reducer is easy to throw out to the exhaust hole under the driving of the speed reducer, and the lubricating oil is thrown out of the shell from the exhaust hole, so that the problems are more obvious.
Researches show that the reasons for difficult processing of the oil filling hole, the oil discharging hole and the exhaust hole are as follows: first, the wall thickness (dimension in the radial direction) of the portion of the rib portion for radially partitioning the oil groove from the speed reducer chamber is small, and it is difficult to machine oblique holes (i.e., oil filler hole, oil drain hole, exhaust hole) in the portion of the rib portion having a small wall thickness, and it is more difficult to machine the holes when the holes are threaded holes (serving as oil filler hole, oil drain hole). Secondly, the position of the oil filler point, the oil drain hole close to the opening of the speed reducer cavity in the axial direction has a limiting requirement, and the oil filler point, the oil drain hole cannot be too far away from the opening of the oil groove in the axial direction, otherwise, the opening of the oil filler point, the oil drain hole is easily blocked by the speed reducer in the speed reducer cavity, so that lubricating oil cannot be injected into the speed reducer cavity or the lubricating oil in the speed reducer cavity cannot be discharged. In order to smoothly add or discharge the lubricating oil in the speed reducer cavity, the diameters of the oil filler hole and the oil drain hole are set to be large, so that the allowable range of the positional deviation of the opening is very small when the oil filler hole and the oil drain hole are machined, and the machining of the oil filler hole and the oil drain hole is difficult.
Researches find that the reason for causing the difficulty in assembling the oil filling hole, the oil discharging hole and the bolt is as follows: when assembling the bolt to in oil filler point, the oil drain hole, the bolt can pass the oil groove, and the oil groove is less at radial ascending width size, and the radial dimension of bolt is great, so the bolt is very easy to interfere with flange portion when the assembly, causes the assembly difficulty of oil filler point, oil drain hole and bolt.
Researches show that the reasons for inconvenient maintenance of the lubricating oil in the shell are as follows: on the one hand, the oil amount in the speed reducer chamber cannot be observed from the outside of the housing, and therefore, the lubricating oil cannot be replenished in time when the oil amount is insufficient. On the other hand, the quality of the lubricating oil in the reducer cavity cannot be observed from the outside of the housing, so that the lubricating oil cannot be replaced in time when the quality of the lubricating oil is poor.
Accordingly, the present invention provides an improved in-wheel drive assembly that advantageously addresses the aforementioned deficiencies of prior in-wheel drive assemblies.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Before making a detailed description, it is emphasized that in the technical solution of the present invention, unless specifically stated otherwise, the axial direction refers to the axial direction of the annular housing, the circumferential direction refers to the circumferential direction of the annular housing, and the radial direction refers to the radial direction of the annular housing. The axial extension is not strictly limited to being parallel to the central axis of the annular housing, and may be at an acute angle to the central axis, and the radial extension is not strictly limited to being perpendicular to the central axis, and may be at an acute angle to the central axis O.
Referring to fig. 1 to 2, the in-wheel drive assembly provided in the present embodiment includes an annular housing 1, and the housing 1 is configured to be fixed to a hub (not shown) of a wheel. The housing 1 includes an annular main body portion 10 extending in the axial direction and an annular flange portion 11 fixed to one axial end of the main body portion 10 on the radially inner side of the main body portion 10. The edge blocking part 11 divides a space (not marked) surrounded by the main body part 10 into a speed reducer cavity 12 and a motor cavity 13, the speed reducer cavity 12 is located on the radial inner side of the motor cavity 13, and the speed reducer cavity 12 is communicated with the motor cavity 13. The reducer cavity 12 is used for accommodating a reducer (not shown), and the motor cavity 13 is used for accommodating a motor (not shown), which provides power for the running of the automobile.
The reducer chamber 12 is filled with lubricating oil to lubricate and cool various parts of the reducer in the reducer chamber 12, thereby improving the performance and efficiency of the reducer.
The collar portion 11 is provided with an annular oil groove 14 around the central axis O of the housing 1, the approximate position of which is indicated by a two-dot chain line in fig. 1 since the oil groove 14 is not visible. The oil groove 14 is located radially outside the reducer chamber 12, and an opening of the oil groove 14 faces axially away from the other axial end of the main body portion 10, so that the opening faces axially away from the motor chamber 13. In the present embodiment, the longitudinal section of the oil groove 14 is U-shaped, but the longitudinal section of the oil groove 14 may be any shape in the technical solution of the present invention, and is not limited to the present embodiment.
The flange portion 11 is provided with an oil filler hole 15 and an oil drain hole 16, and the oil filler hole 15 and the oil drain hole 16 are both located between the oil groove 14 and the speed reducer cavity 12 in the radial direction, and are both communicated with the oil groove 14 and the speed reducer cavity 12, so that: on one hand, lubricating oil can flow into the reducer cavity 12 through the oil groove 14 and the oil injection hole 15 in sequence, so that oil can be injected into the reducer cavity 12; on the other hand, the lubricating oil in the reduction gear chamber 12 can be discharged through the oil discharge hole 16 and the oil groove 14 in this order, thereby discharging the oil from the reduction gear chamber 12. The oil filling holes 15 and the oil discharge holes 16 in the lip portion 11 are arranged at intervals in the circumferential direction. In FIG. 2, the cut surface does not pass through the oil hole 15, so the oil hole 15 is not visible in the drawing. When the in-wheel drive assembly is mounted to the automobile, the oil filler hole 15 is higher than the oil drain hole 16, that is, the oil filler hole 15 is closer to the roof than the oil drain hole 16 in the vehicle height direction.
The wheel inner drive assembly further comprises an annular cover plate 2, the cover plate 2 and the opening of the oil groove 14 are oppositely arranged along the axial direction, and the cover plate 2 and the edge blocking part 11 are fixed, so that the cover plate 2 is arranged on the opening of the oil groove 14 in a covering mode, the opening is prevented from being exposed, and the function of preventing lubricating oil in the oil groove 14 from leaking is achieved.
The apron 2 is equipped with the exhaust hole 20 with oil groove 14 intercommunication, install exhaust check valve 3 in the exhaust hole 20, exhaust check valve 3 is used for the folk prescription to inject the air and discharges to the atmosphere from oil groove 14 for the air in reduction gear chamber 12 can be in proper order via oil filler point 15, oil groove 14, exhaust check valve 3 discharges to the atmosphere, however, external atmosphere can't flow in oil groove 14 via exhaust check valve 3, avoided external pollutant to get into in reduction gear chamber 12 so that arouse the pollution via oil groove 14 in proper order, oil filler point 15, oil drain hole 16.
When the in-wheel drive assembly works, lubricating oil in the speed reducer cavity 12 can be thrown out to the oil groove 14 from the oil filling hole 15 under the drive of the speed reducer, under the limiting action of the cover plate 2, the lubricating oil in the oil groove 14 cannot be leaked, and can flow downwards in the oil groove 14 under the action of self gravity, and then flows back to the speed reducer cavity 12 through the oil discharge hole 16, so that the recovery of the lubricating oil in the speed reducer cavity 12 is realized, the reduction of the lubricating oil in the speed reducer cavity 12 and a series of problems caused by the reduction of the lubricating oil are avoided, and the efficiency and the performance of the in-wheel drive assembly are improved.
In the present embodiment, the vent hole 20 and the oil filler hole 15 are provided at a spacing in the circumferential direction of the in-wheel drive assembly. As mentioned above, when the in-wheel drive assembly works, the lubricating oil in the speed reducer cavity 12 can splash under the driving of the speed reducer, part of the splashed lubricating oil can be mixed with the air in the speed reducer cavity 12 to form oil gas, the oil gas is discharged from the oil injection hole 15 to realize oil-gas separation, the separated air is discharged to the atmosphere from the exhaust one-way valve 3, and the exhaust hole 20 and the oil injection hole 15 are staggered in the circumferential direction of the in-wheel drive assembly, so that the separated lubricating oil cannot leak from the exhaust one-way valve 3 in the exhaust hole 20, a series of problems caused by the reduction of the lubricating oil in the speed reducer cavity 12 and the reduction of the lubricating oil are avoided, and the efficiency and the performance of the in-wheel drive assembly are improved.
Further, in the present embodiment, the exhaust hole 20 is spaced from the oil filler hole 15 at an acute angle of less than 45 degrees in the circumferential direction of the in-wheel drive assembly. Of course, in other embodiments, the vent hole 20 and the oil filling hole 15 may be aligned in the axial direction of the in-wheel drive assembly, i.e., they are spaced at an angle of zero, regardless of the leakage of the separated lubricating oil.
In the present embodiment, the exhaust hole 20 and the oil drain hole 16 are disposed at an interval of 180 degrees in the circumferential direction of the in-wheel drive assembly, so that the exhaust hole 20 and the oil drain hole 16 are on the same plane on which the central axis O of the housing 1 is located. When the in-wheel drive assembly is mounted on the automobile: as shown in fig. 1, the exhaust hole 20 is located above the central axis O, a connection line between the exhaust hole 20 and the center (not identified) of the cover plate 2 is parallel to the vehicle height direction, and the highest position of the oil groove 14 in the vehicle height direction corresponds to the exhaust hole 20; as shown in fig. 1 to 2, the drain hole 16 is located below the center axis O and corresponds to the lowest position of the oil sump 14 in the vehicle height direction.
As can be seen from the foregoing, the air in the speed reducer chamber 12 is discharged to the atmosphere sequentially through the oil filling hole 15, the oil tank 14, and the air discharge check valve 3, and since the air discharge hole 20 corresponds to the highest position of the oil tank 14 in the vehicle height direction, the air entering the oil tank 14 from the speed reducer chamber 12 to the highest position can also be discharged to the atmosphere through the air discharge check valve 3 in the air discharge hole 20, thereby achieving the most efficient discharge of the air in the housing 1.
As can be seen from the foregoing, the lubricating oil flowing into the oil sump 14 from the retarder chamber 12 flows back into the retarder chamber 12 through the oil drain hole 16, and since the oil drain hole 16 corresponds to the lowest position of the oil sump 14 in the vehicle height direction, the lubricating oil at the lowest position in the oil sump 14 can also flow back into the retarder chamber 12 through the oil drain hole 16, and the maximum efficiency recovery of the lubricating oil in the oil sump 14 is achieved.
However, it should be noted that in other embodiments, the exhaust hole 20 and the oil discharge hole 16 may be spaced at other angles (for example, obtuse angles) in the circumferential direction of the in-wheel drive assembly, regardless of the efficiency of discharging air from the casing 1 and the efficiency of recovering lubricating oil from the oil sump 14.
In the present embodiment, the vent hole 20 penetrates the cover plate 2 in the axial direction, whereas in the conventional in-wheel drive assembly, the vent hole is provided obliquely at a portion of the rib for radially separating the oil groove from the speed reducer chamber, and as compared with the above, the vent hole 20 in the present embodiment is easier to machine.
In this embodiment, the oil filling hole 15 and the oil discharge hole 16 are both disposed obliquely to the central axis O of the housing 1, that is, the oil filling hole 15 and the oil discharge hole 16 are not perpendicular to the central axis O, and the opening of each oil hole close to the oil groove 14 is closer to the cover plate 2 than the opening of each oil hole close to the speed reducer cavity 12 in the axial direction. However, in the technical solution of the present invention, the relative positional relationship between the oil filler hole 15, the oil drain hole 16 and the central axis O should not be limited to the embodiment.
In the present embodiment, at least one of the oil filler hole 15 and the oil drain hole 16 is a smooth hole. And oil hole, oil drain hole are the screw hole in the drive assembly in the current wheel, and the processing of unthreaded hole is simpler than the screw hole. In addition, because the oil filling hole 15 and the oil discharging hole 16 are smooth holes and do not need to be in threaded fit with the bolt, the problem that the oil filling hole, the oil discharging hole and the bolt are difficult to assemble in the conventional in-wheel drive assembly does not exist.
In the present embodiment, the number of the oil filler holes 15 and the oil drain holes 16 is one.
In a modified example of the present embodiment, at least one of the oil holes 15 and the oil drain holes 16 is two or more, and all the oil holes 15 and the oil drain holes 16 are arranged at intervals in the circumferential direction. This variant has the following advantages over the present embodiment: by increasing the number of the oil holes 15 and/or the oil discharge holes 16, the diameters of the oil holes 15 and the oil discharge holes 16 can be reduced while lubricating oil can be smoothly added into the speed reducer cavity 12 or lubricating oil in the speed reducer cavity 12 can be smoothly discharged, and when the diameters of the oil holes 15 and the oil discharge holes 16 are small, the allowable range of the position deviation of the openings of the oil holes close to the speed reducer cavity 12 is relatively large when the oil holes 15 and the oil discharge holes 16 are processed, so that the processing of the oil holes 15 and the oil discharge holes 16 is more difficult.
In the present embodiment, the exhaust check valve 3 is an exhaust bolt, and in other embodiments, the exhaust check valve 3 may be configured in other configurations that enable one-way exhaust.
In the present embodiment, the rib portion 11 includes a first radially extending portion 11a and a second radially extending portion 11b extending in the radial direction, the second radially extending portion 11b is located radially inward of the first radially extending portion 11a, and the first radially extending portion 11a and the second radially extending portion 11b are fixed by an axially extending portion 11c extending in the axial direction.
However, in the present invention, the shape and structure of the rib 11 should not be limited to the embodiment, as long as the rib can divide the space surrounded by the main body 10 into the reducer cavity 12 and the motor cavity 13.
In this embodiment, the cover plate 2 is a visible cover plate, the oil level height of the lubricating oil in the oil groove 14 can be observed from the cover plate 2, and when the oil amount in the casing 1 is judged to be insufficient based on the oil level height, the lubricating oil can be timely supplied into the casing 1.
Further, in this embodiment, the surface of the cover plate 2 facing away from the housing 1 in the axial direction is provided with a plurality of scale marks 22, and the scale marks 22 are used for representing the oil amount of the lubricating oil in the housing 1, so that whether the oil amount of the lubricating oil in the housing 1 is suitable can be very intuitively judged according to the scale marks 22, and when the oil amount is judged to be insufficient, the lubricating oil can be timely supplemented into the housing 1.
Further, in the present embodiment, the plurality of scales 22 includes a maximum oil amount scale 24 and a minimum oil amount scale 23. When the in-wheel drive assembly is mounted to the vehicle, the maximum oil volume graduation line 24 is located above the minimum oil volume graduation line 23. The maximum oil volume scale line 24 is used for representing the maximum suitable oil volume of the lubricating oil in the shell 1, the minimum oil volume scale line 23 is used for representing the minimum suitable oil volume of the lubricating oil in the shell 1, and when the oil level of the lubricating oil in the oil groove 14 is lower than the minimum oil volume scale line 23 when the cover plate 2 is observed, the lubricating oil is supplemented into the shell 1. When the lubricating oil is injected into the housing 1, when the cover plate 2 is observed that the oil level of the lubricating oil in the oil groove 14 reaches the maximum oil volume scale line 24, the injection of the lubricating oil into the housing 1 is stopped, and the waste of the lubricating oil is avoided.
It should be noted that, in other embodiments, the plurality of scale marks 22 on the cover plate 2 may be arranged in other manners, and should not be limited to this embodiment.
Further, in the present embodiment, the cover plate 2 is a transparent cover plate, and the color of the lubricant in the oil groove 14 can be observed from the cover plate 2. When the color of the lubricating oil is observed to be abnormal, the quality of the lubricating oil in the shell 1 is poor, and the lubricating oil in the shell 1 can be replaced in time. Generally, a lighter color and a higher transparency of the lubricant will indicate a better quality lubricant, and vice versa will indicate a poorer quality lubricant. It should be noted that the color of the transparent cover plate should not interfere with the determination of the color of the lubricant in the oil groove 14.
When the cover plate 2 is a transparent cover plate, the material thereof may be glass or engineering plastic, and the engineering plastic may be PA (nylon), PP (polypropylene), etc.
In this embodiment, the cover plate 2 is detachably and fixedly connected with the rib 11, the cover plate 2 is provided with a sealing through hole 21 communicated with the oil groove 14, and the sealing through hole 21 is internally provided with a detachable sealing plug 4. In the specific embodiment, the sealing through-hole 21 penetrates the cover plate 2 in the axial direction of the cover plate 2.
When lubricating oil is injected into the housing 1, the sealing plug 4 is fitted into the sealing through hole 21 to prevent the lubricating oil in the housing 1 from leaking, the exhaust check valve 3 is removed, the lubricating oil is injected from the exhaust hole 20, and the injected lubricating oil flows into the reducer cavity 12 through the oil groove 14 and the oil injection hole 15 in this order. After the lubricating oil is injected, the exhaust check valve 3 is installed in the exhaust hole 20.
When the lubricating oil in the housing 1 needs to be discharged, the sealing plug 4 is directly taken off without detaching the cover plate 2, and the lubricating oil in the reducer cavity 12 is discharged through the oil discharge hole 16, the oil groove 14 and the sealing through hole 21 in sequence.
Further, in this embodiment, the cover plate 2 and the housing 1 are detachably and fixedly connected by bolts 5, the number of the bolts 5 is two or more, and the bolts 5 are arranged in two circles, one circle of the bolts 5 is located on the radial outer side of the cover plate 2, the other circle of the bolts 5 is located on the radial inner side of the cover plate 2, and all the bolts 5 of each circle are arranged at intervals along the circumferential direction. However, it should be noted that in other embodiments, the cover plate 2 and the housing 1 may be detachably and fixedly connected in other manners.
Further, in this embodiment, the sealing plug 4 is a bolt, the sealing through hole 21 is a threaded hole, the sealing plug 4 is in threaded fit with the sealing through hole 21, and the sealing plug 4 can be taken down by reversely screwing the sealing plug 4. However, in other embodiments, the sealing plug 4 may have other structures, the sealing through hole 21 may be a light hole, and the structures of the sealing plug 4 and the sealing through hole 21 are not limited to the embodiment.
Further, in the present embodiment, the sealing through holes 21 and the exhaust holes 20 are provided at an interval of 180 degrees in the circumferential direction of the in-wheel drive assembly. As can be seen from the foregoing, in the present embodiment, the oil drain hole 16 and the air drain hole 20 are also provided at an interval of 180 degrees in the circumferential direction of the in-wheel drive assembly, so that the sealing through-hole 21 and the oil drain hole 16 are aligned in the axial direction of the in-wheel drive assembly at the same angle in the circumferential direction of the in-wheel drive assembly. When the lubricant in the housing 1 is discharged, all the lubricant in the reduction gear chamber 12 can flow into the oil groove 14 through the oil discharge hole 16 and finally discharged from the seal through hole 21, thereby achieving the most efficient discharge of the lubricant in the housing 1. However, it should be noted that, in other embodiments, the sealing through hole 21 and the exhaust hole 20 may be spaced at other angles (e.g., obtuse angles) in the circumferential direction of the in-wheel drive assembly, regardless of the efficiency of discharging the lubricant in the in-wheel drive assembly.
In a first variant of this embodiment, the cover 2 is provided with a further sealing through-hole (not shown) communicating with the oil groove 14, which is spaced from the exhaust hole 20 in the circumferential direction of the in-wheel drive assembly, and in which a removable sealing plug (not shown) is fitted. When lubricating oil needs to be injected into the shell 1, the exhaust check valve 3 does not need to be taken down, the sealing plug is taken down, and the lubricating oil is injected into the oil groove 14 through the other sealing through hole. The sealing plug does not need to be removed when the lubricating oil in the housing 1 needs to be drained. The present embodiment has the following advantages over the modification: the number of parts used in the in-wheel drive assembly is smaller.
In a second variant of the present embodiment, the cover 2 is rigidly fixed to the housing 1, in which case the lubricant in the housing 1 can be drained by removing the sealing plug 4.
In a third variation of this embodiment, the sealing plug 4 and the sealing through hole 21 are not provided, and in this case, the lubricating oil in the housing 1 can be discharged by removing the cover 2, or the exhaust check valve 3 is positioned below the center axis O by rotating the wheel internal drive assembly, and the lubricating oil in the housing 1 is discharged through the exhaust hole 20 by removing the exhaust check valve 3. The present embodiment has the following advantages over the modification: it is simpler to discharge the lubricating oil in the housing 1.
In this embodiment, the rib 11 is further provided with a first annular seal groove and a second annular seal groove (not labeled) surrounding the central axis O, the openings of the first seal groove and the second seal groove are arranged on the same axial side of the housing 1 as the opening of the oil groove 14, the first seal groove is located on the radial outer side of the oil groove 14, and the second seal groove is located between the oil groove 14 and the reducer cavity 12 in the radial direction. And a first sealing ring is arranged in the first sealing groove, a second sealing ring is arranged in the second sealing groove, and the first sealing ring and the second sealing ring are axially abutted against the cover plate 2 so as to prevent lubricating oil in the oil groove 14 from leaking.
In this embodiment, the in-wheel drive assembly further comprises a central flange shaft 6 and a rear housing 7. Wherein the central flange shaft 6 is parallel to the central axis O and passes through the central hole of the housing 1. The rear housing 7 is fixed to the other end of the main body 10 in the axial direction and encloses a stopper chamber 17 for accommodating a stopper (not shown).
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (11)
1. An in-wheel drive assembly comprising:
the annular shell comprises an annular main body part extending along the axial direction and an annular flange part fixed on the radial inner side of the main body part and one axial end of the main body part, the flange part divides a space surrounded by the main body part into a speed reducer cavity and a motor cavity, and the speed reducer cavity is positioned on the radial inner side of the motor cavity;
the annular oil groove is arranged on the flange part and surrounds the central axis of the shell, the oil groove is positioned on the radial outer side of the speed reducer cavity, and an opening of the oil groove is opposite to the axial other end of the main body part in the axial direction;
the oil filling hole and the oil discharging hole are arranged on the flange part, are radially positioned between the oil groove and the speed reducer cavity and are communicated with the oil groove and the speed reducer cavity;
characterized in that, drive assembly still includes in the wheel: the annular cover plate is arranged opposite to the opening of the oil groove along the axial direction, and the cover plate is fixed with the flange part;
the exhaust hole is formed in the cover plate and communicated with the oil groove;
and the exhaust check valve is arranged in the exhaust hole and used for unidirectionally limiting air to be exhausted from the oil groove to the atmosphere.
2. The in-wheel drive assembly according to claim 1, wherein at least one of the oil filler hole and the oil drain hole is a light hole.
3. The in-wheel drive assembly according to claim 2, wherein at least one of the oil filler hole and the oil drain hole is two or more in number, and all of the oil filler hole and the oil drain hole are arranged at intervals in a circumferential direction.
4. The in-wheel drive assembly according to claim 1, wherein the cover plate is a visual cover plate from which a level of lubricant in the sump is observable.
5. The in-wheel drive assembly according to claim 4, wherein the surface of the cover plate facing away from the housing in the axial direction is provided with a plurality of graduations indicative of the amount of lubricant in the housing.
6. An in-wheel drive assembly according to claim 4, wherein the visual cover is a clear cover from which the colour of the oil in the sump can be viewed.
7. The in-wheel drive assembly according to claim 1, wherein the cover plate is removably and fixedly connected to the flange portion; and/or the presence of a gas in the gas,
the cover plate is provided with a sealing through hole communicated with the oil groove, and a detachable sealing plug is arranged in the sealing through hole;
when the in-wheel drive assembly is mounted on the automobile and the sealing plug is taken down from the cover plate, the lubricating oil in the shell is discharged through the oil discharge hole, the oil groove and the sealing through hole in sequence.
8. The in-wheel drive assembly according to claim 7, wherein the releasable attachment is a bolt attachment and the sealing plug is a bolt that is threadably engaged with the sealing through-hole.
9. The in-wheel drive assembly according to claim 7, wherein the sealing through-holes and the exhaust holes are arranged at 180 degrees intervals in a circumferential direction of the in-wheel drive assembly.
10. The in-wheel drive assembly according to any one of claims 1 to 9, wherein the exhaust hole and the oil drain hole are provided at an interval of 180 degrees in a circumferential direction of the in-wheel drive assembly.
11. The in-wheel drive assembly according to any one of claims 1 to 9, wherein the vent hole and the oil filler hole are provided at a spacing in a circumferential direction of the in-wheel drive assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610202726.2A CN107289115B (en) | 2016-04-01 | 2016-04-01 | In-wheel drive assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610202726.2A CN107289115B (en) | 2016-04-01 | 2016-04-01 | In-wheel drive assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107289115A CN107289115A (en) | 2017-10-24 |
| CN107289115B true CN107289115B (en) | 2021-08-17 |
Family
ID=60088257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610202726.2A Active CN107289115B (en) | 2016-04-01 | 2016-04-01 | In-wheel drive assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107289115B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7204289B2 (en) * | 2018-04-18 | 2023-01-16 | 住友重機械工業株式会社 | gearbox |
| JP7481599B1 (en) | 2023-10-17 | 2024-05-10 | ファナック株式会社 | Covers, seal structures and industrial machinery |
Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005083491A (en) * | 2003-09-09 | 2005-03-31 | Toyota Motor Corp | Catch tank |
| JP2007032797A (en) * | 2005-07-29 | 2007-02-08 | Toyota Motor Corp | Driving device and automobile loading the same |
| CN201552978U (en) * | 2009-12-15 | 2010-08-18 | 四川成都成工工程机械股份有限公司 | Drive axle with disassembly-free lubrication |
| CN102365475A (en) * | 2009-03-25 | 2012-02-29 | 索尤若驱动有限及两合公司 | Transmission that is at least partially filled with oil |
| CN102606718A (en) * | 2011-01-24 | 2012-07-25 | 株式会社神崎高级工机制作所 | Electric transaxle |
| CN103256379A (en) * | 2012-02-17 | 2013-08-21 | 谢夫勒科技股份两合公司 | Oil guidance system of gear box device, and gear box device with the same |
| CN103335095A (en) * | 2013-07-15 | 2013-10-02 | 南京金鑫传动设备有限公司 | Reducer |
| WO2013179591A1 (en) * | 2012-06-01 | 2013-12-05 | マツダ株式会社 | Lubrication structure for transmission |
| JP2014119085A (en) * | 2012-12-19 | 2014-06-30 | Suzuki Motor Corp | Vehicular transmission |
| WO2014103204A1 (en) * | 2012-12-28 | 2014-07-03 | ダイキン工業株式会社 | Scroll compressor |
| WO2014112977A1 (en) * | 2013-01-15 | 2014-07-24 | United Technologies Corporation | Fluid collection gutter for a geared turbine engine |
| DE102013206880B3 (en) * | 2013-04-17 | 2014-07-31 | Schaeffler Technologies Gmbh & Co. Kg | Oil catcher for a planetary gearbox |
| CN204114070U (en) * | 2014-07-24 | 2015-01-21 | 安徽江淮汽车股份有限公司 | A kind of gearbox |
| CN104329448A (en) * | 2014-11-24 | 2015-02-04 | 盛瑞传动股份有限公司 | Main shell of gearbox |
| CN104565316A (en) * | 2013-10-23 | 2015-04-29 | 铃木株式会社 | Gear case |
| WO2015093215A1 (en) * | 2013-12-17 | 2015-06-25 | Ntn株式会社 | In-wheel motor drive device |
| CN105074285A (en) * | 2013-03-29 | 2015-11-18 | 马自达汽车株式会社 | Structure for lubricating transmission |
| WO2015186466A1 (en) * | 2014-06-04 | 2015-12-10 | Ntn株式会社 | In-wheel motor drive device |
| CN105402380A (en) * | 2015-12-24 | 2016-03-16 | 沃德传动（天津）股份有限公司 | Device for preventing ventilation cap oil leakage |
| DE102015207810A1 (en) * | 2015-04-28 | 2016-03-17 | Schaeffler Technologies AG & Co. KG | Drive arrangement for a vehicle with a lubricant pump device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5946781B2 (en) * | 2013-02-06 | 2016-07-06 | 日立オートモティブシステムズ株式会社 | Valve timing control device for internal combustion engine |
-
2016
- 2016-04-01 CN CN201610202726.2A patent/CN107289115B/en active Active
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005083491A (en) * | 2003-09-09 | 2005-03-31 | Toyota Motor Corp | Catch tank |
| JP2007032797A (en) * | 2005-07-29 | 2007-02-08 | Toyota Motor Corp | Driving device and automobile loading the same |
| CN102365475A (en) * | 2009-03-25 | 2012-02-29 | 索尤若驱动有限及两合公司 | Transmission that is at least partially filled with oil |
| CN201552978U (en) * | 2009-12-15 | 2010-08-18 | 四川成都成工工程机械股份有限公司 | Drive axle with disassembly-free lubrication |
| CN102606718A (en) * | 2011-01-24 | 2012-07-25 | 株式会社神崎高级工机制作所 | Electric transaxle |
| CN103256379A (en) * | 2012-02-17 | 2013-08-21 | 谢夫勒科技股份两合公司 | Oil guidance system of gear box device, and gear box device with the same |
| WO2013179591A1 (en) * | 2012-06-01 | 2013-12-05 | マツダ株式会社 | Lubrication structure for transmission |
| JP2014119085A (en) * | 2012-12-19 | 2014-06-30 | Suzuki Motor Corp | Vehicular transmission |
| WO2014103204A1 (en) * | 2012-12-28 | 2014-07-03 | ダイキン工業株式会社 | Scroll compressor |
| WO2014112977A1 (en) * | 2013-01-15 | 2014-07-24 | United Technologies Corporation | Fluid collection gutter for a geared turbine engine |
| CN105074285A (en) * | 2013-03-29 | 2015-11-18 | 马自达汽车株式会社 | Structure for lubricating transmission |
| DE102013206880B3 (en) * | 2013-04-17 | 2014-07-31 | Schaeffler Technologies Gmbh & Co. Kg | Oil catcher for a planetary gearbox |
| CN103335095A (en) * | 2013-07-15 | 2013-10-02 | 南京金鑫传动设备有限公司 | Reducer |
| CN104565316A (en) * | 2013-10-23 | 2015-04-29 | 铃木株式会社 | Gear case |
| WO2015093215A1 (en) * | 2013-12-17 | 2015-06-25 | Ntn株式会社 | In-wheel motor drive device |
| WO2015186466A1 (en) * | 2014-06-04 | 2015-12-10 | Ntn株式会社 | In-wheel motor drive device |
| CN204114070U (en) * | 2014-07-24 | 2015-01-21 | 安徽江淮汽车股份有限公司 | A kind of gearbox |
| CN104329448A (en) * | 2014-11-24 | 2015-02-04 | 盛瑞传动股份有限公司 | Main shell of gearbox |
| DE102015207810A1 (en) * | 2015-04-28 | 2016-03-17 | Schaeffler Technologies AG & Co. KG | Drive arrangement for a vehicle with a lubricant pump device |
| CN105402380A (en) * | 2015-12-24 | 2016-03-16 | 沃德传动（天津）股份有限公司 | Device for preventing ventilation cap oil leakage |
Non-Patent Citations (2)
| Title |
|---|
| OIL LEAK CAUSES AND PREVENTION IN LARGE ELECTRIC MOTORS;Emam Hashish etc.;《2014 International Conference on Electrical Machines》;20140918;1-8 * |
| 滤波减速器转臂轴承混合润滑性能分析;张莹等;《四川大学学报》;20160320;第48卷(第2期);184-190 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107289115A (en) | 2017-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9944229B2 (en) | Axle assembly having a bowl cover | |
| EP2536964B1 (en) | Differential apparatus | |
| US20160047461A1 (en) | Axle Assembly Having a Bowl Cover with Lubricant Management Features | |
| US7866231B2 (en) | Axle assembly having gasket that shields an opening | |
| CN107289115B (en) | In-wheel drive assembly | |
| CN104981631A (en) | Adapter module | |
| JP3895391B2 (en) | Lubricant reconditioning equipment for gears | |
| US10962102B2 (en) | Supporting device for a bearing mounted on a differential housing | |
| JP2014047899A (en) | Breather device for transmission | |
| SE468058B (en) | HYDRAULIC PUMP FOR A VEHICLE ENGINE | |
| CN213619315U (en) | All-terrain vehicle and hybrid power assembly thereof | |
| CN204113513U (en) | Fuel pump and motor | |
| CN217108167U (en) | Oil sealing structure of gear box | |
| CN218266481U (en) | Impeller mounting structure, water pump and engine | |
| KR100912946B1 (en) | Oil tank of cap device | |
| CN220622698U (en) | All-terrain vehicle | |
| JP5917194B2 (en) | Power transmission device for hybrid system | |
| CN221033879U (en) | Ventilation structure of reduction gearbox and reduction gearbox | |
| CN216872967U (en) | Shared end cover and speed reduction type all-in-one machine adopting same | |
| CN220228705U (en) | Ventilation oil filling plug and automobile hub cover using same | |
| CN108134470A (en) | Compact traction electric machine end cap | |
| CN218818000U (en) | Keep off oily assembly and gearbox housing | |
| CN220646064U (en) | All-terrain vehicle | |
| CN207333508U (en) | Retarder bearing support assembly | |
| CN217814868U (en) | Speed reducer shell, speed reducer and power assembly for electric vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |