CN116221377A - Lubricating method and lubricating structure for new energy vehicle motor spline pair - Google Patents

Lubricating method and lubricating structure for new energy vehicle motor spline pair Download PDF

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Publication number
CN116221377A
CN116221377A CN202310278957.1A CN202310278957A CN116221377A CN 116221377 A CN116221377 A CN 116221377A CN 202310278957 A CN202310278957 A CN 202310278957A CN 116221377 A CN116221377 A CN 116221377A
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China
Prior art keywords
spline
oil
oil guide
lubrication
guide groove
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Pending
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CN202310278957.1A
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Chinese (zh)
Inventor
杨霄
田婷婷
左冰娥
董克进
王攀
陈豪杰
丁滔
李振江
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Chongqing Tsingshan Industrial Co Ltd
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Chongqing Tsingshan Industrial Co Ltd
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Priority to CN202310278957.1A priority Critical patent/CN116221377A/en
Publication of CN116221377A publication Critical patent/CN116221377A/en
Pending legal-status Critical Current

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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
    • F16H57/043—Guidance of lubricant within rotary parts, e.g. axial channels or radial openings in shafts
    • 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
    • F16H57/048—Type of gearings to be lubricated, cooled or heated
    • F16H57/0493—Gearings with spur or bevel gears
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • General Details Of Gearings (AREA)

Abstract

A lubrication method and a lubrication structure for a new energy vehicle motor spline pair comprise a left box body, a right box body, a motor shaft, a differential mechanism, an oil guide pipe, an oil guide groove and a hollow main shaft. The reduction gear of the differential mechanism stirs lubricating oil to splash to the oil guide groove of the right box body, one part of lubricating oil in the oil guide groove is conveyed to the axle center blind hole of the motor shaft through the oil guide pipe, and enters the spline pair of the lubricating motor from the spline middle section through the radial through hole to form a first lubricating path at the far end of the spline; and the other part enters the lubrication motor spline pair from the right end of the motor spline pair along the shaft hole wall of the hollow main shaft to form a second lubrication path at the far end of the spline. Two far-end lubrication paths are added on the basis of only one spline near-end lubrication path in the prior art, so that the problems of serious abrasion of a motor spline pair caused by poor lubrication effect due to blockage of a lubrication oil path or small lubrication oil quantity are solved.

Description

Lubricating method and lubricating structure for new energy vehicle motor spline pair
Technical Field
The invention relates to the field of shaft tooth lubrication, in particular to a lubrication method and a lubrication structure of a new energy vehicle motor spline pair.
Background
The speed reducer is a speed reduction transmission device between the prime motor and the working machine. The function of matching rotational speed and transmitting torque between a prime motor and a working machine or an actuating mechanism is widely applied to modern machines. In the rapid switching of the working conditions of high rotating speed and positive and negative dragging of the speed reducer of the new energy vehicle for a long time, a spline pair connected with a motor shaft in the speed reducer is used as a connecting part for torque transmission, fretting wear is easier to form under the working conditions, the durability of the spline pair is more severely checked, and the service life and the function of the speed reducer are even influenced. Therefore, adequate lubrication of the motor spline pair is particularly important.
At present, a three-bearing structure is generally adopted in a speed reducer of a new energy automobile, namely a motor front bearing is omitted, only the speed reducer is kept close to a motor side bearing, and the structure needs to be additionally provided with clearance fit formed by an excircle of a motor shaft and an inner hole of a hollow main shaft for auxiliary positioning. The lubrication path of the motor spline pair of the speed reducer structure is mainly used for lubricating from an oil path at the near end of a spline, as shown in fig. 5, lubricating oil in an oil pool of the speed reducer is stirred by a main reduction gear of a differential mechanism arranged in the speed reducer, the lubricating oil splashes to a left bearing chamber at one side of a motor shaft 3 of the speed reducer, and the lubricating oil flows to a matching part of an external spline of the motor shaft and an internal spline of the hollow main shaft through a clearance fit part of the motor shaft and the hollow main shaft to lubricate the motor spline pair. This kind of structure, it is lubricated to the spline from the proximal end, lubrication effect is relatively poor: the main reduction gear of the differential mechanism is a bevel gear, the rotation direction is the right side, most lubricating oil splashes to one side of a right box body in the direction of the whole vehicle advancing form, and the lubricating oil quantity of the left box body is small; if the rotation direction is changed, the oil quantity splashed into the bearing chamber of the left box body is increased, but due to the high rotation speed and the action of centrifugal force, the oil product can be rapidly thrown out by the bearing, the oil quantity entering the gap part at the front end of the spline is extremely limited, and the spline part cannot be well lubricated; and the three bearing structure reduces the gap between the front end of the oil product entering the spline and the inner circle and the outer circle, and the oil product is difficult to enter the spline from the gap. In addition, the spline matching part has a certain length, and the lubricating oil is difficult to uniformly distribute on all parts of the spline, so that the lubricating effect of the motor spline pair is greatly reduced, and the motor spline pair is seriously worn to influence the transmission performance. How to make the motor spline pair fully lubricate under the conditions of high rotation speed and frequent switching is always a problem which each manufacturer wants to solve.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a lubricating method for a motor spline pair of a new energy vehicle, which can be used for lubricating the motor spline pair by entering spline matching positions from the left side, the right side and the middle section of the motor spline pair.
The invention is realized by adopting the following scheme: a new energy vehicle motor spline pair lubrication method includes that a reduction gear of a differential mechanism agitates lubricating oil to splash to a left box body and a right box body, the lubricating oil of the left box body enters a left box body bearing chamber and enters a spline fit position from the left side through a fit gap between a motor shaft and a hollow main shaft; the lubricating oil of the right box body enters the oil guide groove from a notch of a bearing chamber of the right box body, part of lubricating oil in the oil guide groove enters the oil guide pipe through the oil inlet and flows to the axle center blind hole of the motor shaft, the lubricating oil enters the spline fit position from the middle section of the spline fit through the radial through hole, and the other part of lubricating oil enters the spline fit position from the right side of the spline fit position along the shaft hole wall of the hollow main shaft.
The method has the effects that: two lubrication paths which enter the spline matching position from the right end and the middle section of the spline are increased on the basis of the lubrication path of the near end of the spline, and lubricating oil lubricates a spline pair of the motor through different lubrication paths.
The invention further aims to provide a lubricating structure of the motor spline pair of the new energy vehicle, which aims at overcoming the defects in the prior art, can ensure that the motor spline pair is fully lubricated under the conditions of high rotating speed and frequent switching, prolongs the service life and keeps high-performance transmission.
The utility model provides a structure for lubricating method of new energy vehicle motor spline pair, includes left box, right box, motor shaft, differential mechanism, hollow main shaft, left side box and right box fixed connection, left and right box pass through the hollow main shaft of bearing support, and this hollow main shaft hole is equipped with the internal spline, the motor shaft passes through the bearing to be supported on left box, and the extension end of this motor shaft sets up external spline and the internal spline of hollow main shaft and forms spline fit, the motor shaft right-hand member is equipped with an axial extension's axle center blind hole, the pore wall of axle center blind hole sets up radial through-hole and communicates with each other with the spline cooperation department of hollow main shaft and motor shaft, right side box bearing room inner wall sets up leads the oil groove, set up an oil guide pipe in the hollow main shaft, the left end that leads the oil pipe extends into in the axle center blind hole, the right-hand member is fixed in the oil groove of leading of right box, the oil guide pipe right-hand member pipe wall is equipped with the oil inlet and leads the oil groove and communicates, the reducing gear of differential mechanism is located right box side for stirring lubricating oil splashes to leading the oil groove.
The shaft hole of the hollow main shaft is a stepped hole, the middle is provided with an internal spline for the small-diameter hole, and the two ends are large-diameter holes.
The radial through hole is positioned at the middle position of the spline fitting position.
The oil guide groove on the inner wall of the right box bearing chamber is provided with a fixing hole, and the right end of the oil guide pipe is fixed in the fixing hole.
The oil guide groove is a U-shaped groove, the opening direction of the U-shaped groove forms an included angle of 45 degrees with the horizontal, the radius of the arc part of the U-shaped groove is smaller than the radius of the large-diameter hole on the right side of the hollow main shaft, the right box bearing chamber is provided with an oil inlet notch, and the notch is communicated with the notch of the oil guide groove.
The right box sets up the oil guide plate, the oil guide plate is located oil guide groove notch direction and extends to the breach direction of right box bearing room.
The diameter of the oil guide pipe is smaller than that of the blind hole of the axle center.
The oil inlet of the oil guide pipe is clung to the wall of the oil guide groove, and the direction of the opening of the oil inlet is the same as the direction of the notch of the oil guide groove.
The opening of the oil inlet extends along the circumference of the oil guide pipe and is at a central angle of 90 degrees.
By adopting the technical scheme, the hollow main shaft is provided with the internal spline for the small diameter hole in the middle of the stepped hole, and the two ends of the hollow main shaft are provided with the large diameter holes, so that oil is introduced from the far end to lubricate the near-end spline; the depth of the motor shaft blind hole is slightly deeper than the middle position of the spline, and the radial through hole of the motor shaft is positioned at the middle position of the spline and communicated with the motor shaft blind hole, so that oil products entering the spline blind hole are thrown into a gap of the spline pair from the radial through hole under the action of centrifugal force, and spline lubrication is improved; the oil guide groove on the inner wall of the bearing chamber of the right box body is provided with a fixing hole, the right end of the oil guide pipe is fixed in the fixing hole, and the reliability of installation and fixation of the oil guide pipe is facilitated, so that oil products enter a blind hole of a motor shaft from the right box and lubricate spline pairs; the oil guide groove is a U-shaped groove, the radius of the arc part of the U-shaped groove is smaller than the radius of the large-diameter hole on the right side of the hollow main shaft, the opening direction of the U-shaped groove forms an included angle of 45 degrees with the horizontal, the bearing chamber of the right box body is provided with a notch for oil inlet, the notch is communicated with the notch of the oil guide groove, which is beneficial for a differential mechanism to stir oil products to smoothly flow from the oil inlet to the oil guide groove, and the oil products smoothly enter the large-diameter hole on the right side of the hollow main shaft after impacting the oil guide groove, so that spline pairs are lubricated; the right box body is provided with an oil guide plate which is positioned in the direction of the notch of the oil guide groove and extends towards the notch, and the oil inlet notch is divided into an upper part and a lower part, so that the main reduction gear is beneficial to stirring splashed oil products, and the splashed oil products can be smoothly and fully guided into the oil inlet notch of the bearing chamber; the oil inlet of the oil guide pipe is tightly attached to the wall of the oil guide pipe, the opening of the oil inlet extends along the circumference of the oil guide pipe to form a central angle of 90 degrees, the direction of the central line of the oil inlet is the same as the direction of the notch of the oil guide groove, and oil products entering the oil guide groove from the notch can smoothly enter the oil guide pipe under the inertia effect, so that the spline is lubricated.
The beneficial effects of the invention are as follows:
1) Compared with the existing spline near-end lubrication, the invention leads oil from the bearing hole with abundant far-end lubrication oil to the spline, and thoroughly solves the problems of rare oil liquid and difficult lubrication of the spline near-end.
2) The invention utilizes the U-shaped oil guide groove and the oil guide pipe structure of the box body, has the technical advantages of simple structure, high reliability, convenient assembly, high cost and the like, and greatly improves the abrasion of the spline pair of the new energy motor caused by poor lubrication.
3) Compared with the prior art, the invention has the advantages that the included angle between the central line of the input shaft and the central line of the output shaft of the shafting structure and the horizontal line is large, the oil stirring is insufficient, the shafting rotation direction is shifted to one side of the oil stirring, the lubrication of the spline side is poor, the two shaft end surfaces of the three bearings are attached, the radial clearance is small, the oil cannot enter the spline, the oil is radially thrown out due to the high-speed rotation centrifugal force, the lubrication of the spline cannot be limited, and the like, and the invention has obvious advantages and greatly improves the lubrication condition of the motor spline pair.
The invention is further described below with reference to the drawings and specific examples.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a first lubrication path according to the present invention;
FIG. 3 is a schematic diagram of a second lubrication path according to the present invention;
FIG. 4 is an enlarged view of a portion of the right housing bearing chamber of the present invention;
fig. 5 is a schematic diagram of a prior art lubrication path.
Detailed Description
Referring to fig. 2 to 3, in a method for lubricating a spline pair of a new energy vehicle motor, a reduction gear 51 of a differential mechanism 5 agitates lubricating oil to splash to an oil collecting cavity of a left box body 6 and an oil guiding groove 12 of a right box body 1, and the lubricating oil in the oil collecting cavity 61 of the left box body 6 enters the spline fit position from the left end of the spline fit position through a fit gap between a motor shaft 3 and a hollow main shaft 4 to lubricate the motor spline pair to form a lubricating oil path at the near end of the motor spline pair; the lubricating oil in the oil guide groove 12 of the right box body 1 enters the oil guide groove 12 from a bearing chamber notch of the right box body 1, part of the lubricating oil in the oil guide groove 12 enters an oil guide pipe through an oil inlet 21 and flows to an axle center blind hole 31 of the motor shaft 3, and enters a spline fit position from a spline fit middle section through a radial through hole 33 to form a first lubricating path at the far end of a spline; another part of the lubricating oil in the oil guide groove 12 enters the spline fitting place from the right side of the spline fitting place along the shaft hole wall of the hollow main shaft 4 under the action of inertia force to form a second lubricating path of the spline distal end. According to the invention, the first lubrication path and the second lubrication path are initiated from the far ends of the splines with more abundant oil, the motor spline pair is lubricated, even if the oil stirring amount of the differential mechanism is small, the motor spline pair cannot be lubricated by the lubricating oil from the first lubrication path, and the motor spline pair can be lubricated by the lubricating oil collected by the oil guide groove from the second lubrication path.
Referring to fig. 1 to 4, a lubrication structure for a lubrication method of a spline pair of a new energy vehicle motor comprises a left box 6, a right box 1, a motor shaft 3, a differential 5 and a hollow main shaft 4. The left housing 6 is fixedly connected to the right housing 1 and each supports the hollow spindle 4 via a bearing. The shaft hole of the hollow main shaft 4 is a stepped hole, the middle part is provided with an internal spline for a small-diameter hole, the left end and the right end are large-diameter holes, the large-diameter hole at the left end is in clearance fit with a motor shaft, and the large-diameter hole at the right end is an oil guide pipe for giving way and is convenient for lubricating oil to enter the spline fit position. The motor shaft 3 is supported on the left box 6 through a bearing, and an external spline is arranged at the extending end of the motor shaft 3 and is in spline fit with an internal spline of the hollow main shaft 4. The right end of the motor shaft 3 is provided with an axially extending shaft center blind hole 31, the hole wall of the shaft center blind hole 31 is provided with a radial through hole 33, and the radial through hole 33 is led to the middle point position of the spline fit position from the shaft center blind hole 31. The bearing chamber of the left box body 6 is provided with an oil collecting cavity 61, and the oil collecting cavity 61 is communicated with the spline matching part, so that lubricating oil can conveniently enter from the left side of the spline matching part. The oil guiding groove 12 is formed in the inner wall of the bearing chamber of the right box body 1, the oil guiding groove 12 is a U-shaped groove, an included angle of 45 degrees is formed between the opening direction of the U-shaped groove and the horizontal plane, and lubricating oil can enter the oil guiding groove more easily due to the inclined U-shaped groove. The radius of the arc part of the U-shaped groove is smaller than the radius of the large-diameter hole on the right side of the hollow main shaft 4, lubricating oil is guaranteed to smoothly flow into the spline fit position communicated with the large-diameter hole through the large-diameter hole of the hollow main shaft 4, the effect of lubricating spline pairs is achieved, the fixing hole 13 is arranged at the center of the arc, the fixing hole is used for installing an oil guide pipe, the oil guide pipe is prevented from falling off or skewing in the running process of an automobile, a lubricating oil path through the oil guide pipe is influenced, and insufficient lubrication is avoided. The bearing chamber of the right box body 1 is provided with a notch for oil inlet, and the notch is communicated with the notch of the oil guide groove 12. The right box 1 is provided with an oil guide plate 14, and the oil guide plate 14 is positioned in the notch direction of the oil guide groove 12 and extends towards the notch to extend to the notch of the bearing chamber of the right box 1. An oil guide pipe 2 is arranged in the hollow main shaft 4, and the left end of the oil guide pipe 2 extends into the shaft center blind hole 31. The diameter of the oil guide pipe 2 is smaller than that of the axle center blind hole 31, clearance fit is formed between the oil guide pipe and the axle center blind hole 31, the rotation of the motor shaft 3 is not interfered, and the right end of the oil guide pipe is fixed in the fixing hole 13. An oil inlet 21 is formed in the right end pipe wall of the oil guide pipe 2, the oil inlet 21 is tightly attached to the wall of the oil guide groove 12 and is communicated with the oil guide groove 12, and the opening direction of the oil inlet 21 is the same as the notch direction of the oil guide groove 12. The opening of the oil inlet 21 extends along the circumference of the oil guide pipe 2 and is 90 degrees in central angle, so that the lubricating oil is ensured to conveniently enter and not to overflow from the oil guide pipe. The hollow main shaft 4 is meshed with a countershaft disk gear 72, and a countershaft shaft gear 71 is meshed with a reduction gear 51 of the reduction gear 5. The reduction gear 51 of the differential 5 is located on the right case side for agitating the splash of the lubricating oil to the oil guide groove 12.
When the new energy vehicle motor spline pair lubricating structure works, a motor in the speed reducer provides power, so that the motor shaft 3 drives the hollow main shaft 4 in spline fit with the motor shaft 3 to rotate, meanwhile, the hollow main shaft 4 drives the intermediate shaft disc gear 72 to rotate, the intermediate shaft gear 71 drives the reduction gear 51 of the speed reducer 5 to rotate, the reduction gear 51 of the speed reducer 5 rotates to stir lubricating oil in an oil pool, and the lubricating oil splashes to bearing chambers of a left box body and a right box body of the speed reducer. The lubricating oil splashed into the left box bearing chamber is concentrated into the oil collecting cavity 61, and enters a motor spline pair from the left end of the gap fit position of the motor shaft 3 and the hollow main shaft 4 through the gap fit position of the motor shaft 3 and the hollow main shaft 4 to lubricate; the lubricating oil splashed into the right box body enters the oil guide groove 12 from the bearing chamber notch, part of the lubricating oil in the oil guide groove 12 enters the oil guide pipe 2 from the oil inlet 21, and flows into the axle center blind hole 31 at the end part of the motor shaft 3 to spread to the spline fit position from the orifice through the radial through hole 33, and the other part of the lubricating oil in the oil guide groove flows to one side of the motor shaft 3 through the shaft hole of the hollow main shaft 4 and is lubricated by the spline fit right side. In the prior art fig. 5, only the lubrication oil path of the spline near end collects oil through the bearing chamber of the left box body, and the lubrication oil enters from the left side of the spline matching part, so that the lubrication of the motor spline pair is realized.
Compared with the prior art, the invention increases two lubrication paths entering the spline matching position from the right end and the middle section of the spline on the basis of the lubrication path of the near end of the spline, and the lubricating oil can enter the spline matching position from the left side, the right side and the middle section of the spline matching position simultaneously through different lubrication paths to lubricate the motor spline pair, thereby avoiding the problems of insufficient lubrication and damage to the motor spline pair caused by blockage of a near end lubrication oil path or less lubrication oil quantity.
According to the invention, the oil guide groove and the oil collecting cavity collect lubricating oil, and the right box bearing chamber with more abundant lubricating oil is drained to the spline fit position through the oil guide pipe, so that the lubricating oil quantity provided for the spline pair is sufficient, and the problem of poor lubricating effect of the motor spline pair caused by small oil quantity or small oil supply quantity due to centrifugal force and shafting stress is avoided; the lubricating oil fully lubricates the motor spline pair through different lubricating paths, so that the problems that the motor spline pair is seriously worn and the performance of a speed reducer is affected due to poor lubricating effect caused by untimely lubrication and insufficient lubrication caused by blockage of a near-end lubricating oil path are avoided.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the invention, and those skilled in the art will appreciate that the modifications made to the invention fall within the scope of the invention without departing from the spirit of the invention.

Claims (10)

1. A lubrication method of a new energy vehicle motor spline pair is characterized in that a reduction gear (51) of a differential mechanism (5) agitates lubricating oil to a left box body (6) and a right box body (1), the lubricating oil of the left box body (6) enters a bearing chamber of the left box body (6) and enters a spline fit position from the left side through a fit gap between a motor shaft (3) and a hollow main shaft (4), and the lubrication method is characterized in that: the lubricating oil of the right box body (1) enters the oil guide groove (12) from a bearing chamber notch of the right box body (1), part of the lubricating oil in the oil guide groove (12) enters the oil guide pipe (2) through the oil inlet (21) and flows to an axle center blind hole (31) of the motor shaft (3), enters the spline fit position from the middle section of the spline fit through the radial through hole (33), and the other part of the lubricating oil enters the spline fit position from the right side of the spline fit position along the axle hole wall of the hollow main shaft (4).
2. The utility model provides a lubricating structure for new energy vehicle motor spline pair of method of claim 1, includes left box (6), right box (1), motor shaft (3), differential mechanism (5), hollow main shaft (4), left box (6) and right box (1) fixed connection, its characterized in that: left and right box passes through bearing support hollow main shaft (4), and this hollow main shaft (4) shaft hole is equipped with the internal spline, motor shaft (3) are supported on left box (6) through the bearing, and the extension end of this motor shaft (3) sets up external spline and the internal spline formation spline cooperation of hollow main shaft (4), motor shaft (3) right-hand member is equipped with an axial extension's axle center blind hole (31), the pore wall of axle center blind hole (31) sets up radial through-hole (33) and communicates with each other with the spline cooperation department of hollow main shaft (4) and motor shaft (3), right side box (1) bearing room inner wall sets up oil guide groove (12), set up an oil guide pipe (2) in hollow main shaft (4), the left end of oil guide pipe (2) extends into in axle center blind hole (31), and the right-hand member is fixed in oil guide groove (12) of right box (1), oil guide pipe (2) right-hand member pipe wall is equipped with oil inlet (21) and oil guide groove (12) and communicates with each other, gear (51) of differential mechanism (5) are located right box side that splashes for stirring oil guide groove (12).
3. The lubrication structure of the new energy vehicle motor spline pair according to claim 2, wherein: the shaft hole of the hollow main shaft (4) is a stepped hole, the middle is provided with an internal spline for a small-diameter hole, and the two ends are large-diameter holes.
4. The lubrication structure of the new energy vehicle motor spline pair according to claim 2, wherein: the radial through hole (33) is positioned at the middle point of the spline fit section.
5. The lubrication structure of the new energy vehicle motor spline pair according to claim 2, wherein: a fixed hole (13) is formed in an oil guide groove (12) in the inner wall of the bearing chamber of the right box body (1), and the right end of the oil guide pipe (2) is fixed to the fixed hole (13).
6. The lubrication structure of the new energy vehicle motor spline pair according to claim 2, wherein: the oil guide groove (12) is a U-shaped groove, the opening direction of the U-shaped groove is 45-degree with the horizontal included angle, the radius of the arc part of the U-shaped groove is smaller than the radius of the large-diameter hole on the right side of the hollow main shaft, the bearing chamber of the right box body (1) is provided with a notch for oil inlet, and the notch is communicated with the notch of the oil guide groove (12).
7. The lubricating structure of the new energy vehicle motor spline pair according to claim 6, wherein: the right box body (1) is provided with an oil guide plate (14), and the oil guide plate (14) is positioned in the direction of the notch of the oil guide groove (12) and extends towards the notch of the oil guide groove (12).
8. The lubrication structure of the new energy vehicle motor spline pair according to claim 2, wherein: the diameter of the oil guide pipe (2) is smaller than that of the axle center blind hole (31).
9. The lubrication structure of the new energy vehicle motor spline pair according to claim 2, wherein: an oil inlet (21) of the oil guide pipe (2) is tightly attached to the wall of the oil guide groove (12), and the direction of an opening of the oil inlet (21) is the same as the direction of a notch of the oil guide groove (12).
10. The lubrication structure of the new energy vehicle motor spline pair according to claim 2, wherein: the opening of the oil inlet (21) extends along the circumference of the oil guide pipe (2) and is at a central angle of 90 degrees.
CN202310278957.1A 2023-03-21 2023-03-21 Lubricating method and lubricating structure for new energy vehicle motor spline pair Pending CN116221377A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310278957.1A CN116221377A (en) 2023-03-21 2023-03-21 Lubricating method and lubricating structure for new energy vehicle motor spline pair

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310278957.1A CN116221377A (en) 2023-03-21 2023-03-21 Lubricating method and lubricating structure for new energy vehicle motor spline pair

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Publication Number Publication Date
CN116221377A true CN116221377A (en) 2023-06-06

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