CN113251110A - Secondary speed reducer with differential mechanism assembly for pure electric vehicle - Google Patents

Secondary speed reducer with differential mechanism assembly for pure electric vehicle Download PDF

Info

Publication number
CN113251110A
CN113251110A CN202110623274.6A CN202110623274A CN113251110A CN 113251110 A CN113251110 A CN 113251110A CN 202110623274 A CN202110623274 A CN 202110623274A CN 113251110 A CN113251110 A CN 113251110A
Authority
CN
China
Prior art keywords
shell
helical gear
cylindrical helical
speed reducer
assembly
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
CN202110623274.6A
Other languages
Chinese (zh)
Inventor
桂治国
邵华
边永杰
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.)
Nanjing Cv Hs Autoparts Co ltd
Original Assignee
Nanjing Cv Hs Autoparts 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 Nanjing Cv Hs Autoparts Co ltd filed Critical Nanjing Cv Hs Autoparts Co ltd
Priority to CN202110623274.6A priority Critical patent/CN113251110A/en
Publication of CN113251110A publication Critical patent/CN113251110A/en
Pending legal-status Critical Current

Links

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
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/20—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
    • 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
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with 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
    • F16H57/022—Adjustment of gear shafts or 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
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
    • 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
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02039—Gearboxes for particular applications
    • F16H2057/02043—Gearboxes for particular applications for vehicle transmissions
    • 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
    • F16H57/022—Adjustment of gear shafts or bearings
    • F16H2057/0221—Axial adjustment

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Details Of Gearings (AREA)

Abstract

The invention discloses a secondary speed reducer with a differential mechanism assembly for a pure electric vehicle, which comprises a shell, a speed reducer assembly and a differential mechanism assembly, wherein the shell is provided with a first end and a second end; the speed reducer assembly is arranged on one side of the shell and is used for being connected with an output shaft of the driving motor in a use state; the differential assembly is installed at the opposite side of casing for adopt the wheel hub of semi-axis connection electric motor car axle under the user state, wherein: one end of the differential assembly is rotatably connected with the shell, the other end of the differential assembly is detachably mounted on the shell through a bearing cover and can rotate relative to the shell, the rotating speed and the torque of the driving motor are reduced and increased through the speed reducer assembly to drive the differential assembly to rotate, and the differential assembly is used for driving hubs at two ends of the same axle of the pure electric vehicle to rotate. The invention adopts two-stage speed reduction, has high transmission efficiency, simple speed reduction structure, simple shell structure and small total weight, does not need to open a hole with larger diameter on the shell or manufacture the part of the shell for installing the speed reduction gear into two parts, and has high rigidity of the shell.

Description

Secondary speed reducer with differential mechanism assembly for pure electric vehicle
Technical Field
The invention relates to a secondary speed reducer with a differential mechanism assembly for a pure electric vehicle, and belongs to the technical field of automobile manufacturing.
Background
The state keeps the policy of encouragement on the continuous development of new energy vehicles; with the continuous improvement of the market reserves of new energy vehicles and the acceptance of end users, the whole new energy vehicle technology is developed rapidly, for the driving form, the existing technical scheme that a driving motor is directly arranged on a speed reducer is adopted, and in order to reduce the power consumption, the total reduction ratio value of the speed reducer is more than 17; in order to meet the requirement of the large reduction ratio, three-level speed reducing mechanisms are adopted, and the defects of complex shell structure, complex speed reducing mechanism, heavy assembly weight, high manufacturing cost, low transmission efficiency and the like exist, so that the three-level speed reducing mechanism is not applied in large batch all the time.
Disclosure of Invention
The invention aims to solve the technical defects that a secondary speed reducer with a differential assembly for a pure electric vehicle in the prior art is complex in structure and inconvenient to mount.
In order to solve the problems, the technical scheme adopted by the invention is as follows: the differential mechanism comprises a shell, a speed reducer assembly and a differential mechanism assembly, wherein the shell is used for being mounted on an axle of an electric vehicle in a use state; the speed reducer assembly is arranged on one side of the shell and is used for being connected with an output shaft of the driving motor in a use state; the differential assembly is installed at the opposite side of casing for adopt the wheel hub of semi-axis connection electric motor car axle under the user state, wherein: one end of the differential assembly is rotatably connected with the shell, the other end of the differential assembly is detachably mounted on the shell through a bearing cover and can rotate relative to the shell, the rotating speed and the torque of the driving motor are reduced and increased through the speed reducer assembly to drive the differential assembly to rotate, and the differential assembly is used for driving hubs at two ends of the same axle of the pure electric vehicle to rotate. The differential mechanism is detachably arranged on the shell by adopting the bearing cover, so that the differential mechanism is convenient to install, and meanwhile, the gear of the speed reducer can be arranged in the shell from one side of the differential mechanism, and a larger hole is not required to be formed in the position, on the shell, of the speed reducer, so that the rigidity of the shell is prevented from being reduced.
As a further improvement of the invention, the speed reducer assembly comprises a first-stage driving cylindrical helical gear, a first-stage driven cylindrical helical gear, a second-stage driving cylindrical helical gear and a second-stage driven cylindrical helical gear, wherein the first-stage driving cylindrical helical gear is rotatably arranged in the shell, one end of the first-stage driving cylindrical helical gear extends out of the shell and is used for being connected with the driving motor, the second-stage driving cylindrical helical gear is rotatably arranged in the shell, the first-stage driven cylindrical helical gear and the second-stage driving cylindrical helical gear synchronously rotate, the first-stage driven cylindrical helical gear is meshed with the first-stage driving cylindrical helical gear, and the second-stage driven cylindrical helical gear is arranged on the differential assembly and is meshed with the second-stage driving cylindrical helical gear. Compared with a three-level speed reducing mechanism in the prior art, the speed reducer assembly has the advantages that two-level speed reduction is adopted, the transmission efficiency is higher, the structure of the speed reducer is simplified, the complexity of a shell for mounting the speed reducer is simplified, and the cost of the speed reducer assembly with a differential mechanism is reduced.
As a further improvement of the invention, the shell is provided with an oil collecting groove, one end of the oil collecting groove is opened, and the opening faces to the splashing direction of the lubricating oil when the whole vehicle moves forward and is used for collecting the splashing lubricating oil when the whole vehicle moves forward. The oil collecting groove is formed in the shell, so that lubricating oil splashes and stays in the oil collecting groove when the whole vehicle moves forward, the oil collecting groove supplies the lubricating oil to the bearing on the first-stage driving cylindrical helical gear, and the problem of insufficient lubrication caused by the height difference between the bearing on the first-stage driving cylindrical helical gear and the output shaft is solved.
As a further improvement of the invention, the shell is provided with a first oil duct communicated with the oil collecting groove, and lubricating oil in the oil collecting groove is used for lubricating the ball bearing provided with the first-stage driving cylindrical helical gear through the first oil duct. The first oil duct is arranged on the shell, and the lubricating oil in the oil collecting groove flows in the first slideway to lubricate the ball bearing.
As a further improvement of the invention, the primary driven cylindrical helical gear is sleeved on the secondary driving cylindrical helical gear and is in spline fit with the secondary driving cylindrical helical gear. The first-stage driven cylindrical helical gear and the second-stage driving cylindrical helical gear adopt a split structure, the first-stage driven cylindrical helical gear can be installed in the shell from one side of the differential mechanism, then the second-stage driving cylindrical helical gear is installed, and a hole with the diameter larger than the maximum diameter of the first-stage driven cylindrical helical gear is not required to be formed in the shell or the position of the shell where the first-stage driven cylindrical helical gear is installed is made into two parts in order to install the first-stage driven cylindrical helical gear, so that the rigidity reduction of the shell caused by the hole is avoided, and the quality and the service life of the invention are improved.
As a further improvement of the invention, two ends of the inner spline of the first-stage driven cylindrical helical gear and two ends of the outer spline of the second-stage driving cylindrical helical gear are both provided with positioning rabbets, and the positioning rabbets at the two ends of the inner spline are in transition fit with the positioning rabbets at the two ends of the outer spline. The invention ensures that the primary driven cylindrical helical gear and the secondary driving cylindrical helical gear coaxially and synchronously rotate in the using process through the transitional fit of the positioning spigot.
As a further improvement of the invention, a first sealing nut is arranged at one end, away from the primary driving cylindrical helical gear, of the shell for connecting the driving motor, and external threads are arranged on the first sealing nut for being in threaded fit with the shell. The first sealing nut is arranged, the ball bearing clearance of the primary driving cylindrical helical gear can be adjusted and installed through the length of the first sealing nut screwed into the shell, meanwhile, the sealing performance of the invention is improved, the leakage of lubricating oil in the shell is avoided, and the first sealing nut is in threaded fit with the shell, so that the first sealing nut is convenient to install.
As a further improvement of the invention, the outer surface of the first sealing nut is provided with an annular second oil channel, and the first sealing nut is provided with a plurality of oil holes communicated with the second oil channel along the circumferential direction for lubricating and installing the ball bearing of the first-stage driving cylindrical helical gear. According to the invention, the first sealing nut is provided with the second oil duct and the oil hole communicated with the second oil duct, so that lubricating oil in the oil collecting groove can enter the second oil duct through the oil hole to lubricate the ball bearing.
As a further improvement of the present invention, the housing is provided with a first locking structure for preventing the first gland nut from rotating relative to the housing in the use state. The first locking structure is arranged, so that the first sealing nut can be effectively prevented from rotating relative to the shell in use, and the sealing effect of the invention is further improved.
As a further improvement of the present invention, a second seal nut and an adjusting nut which are in threaded fit with the housing are respectively arranged at two ends of the secondary driving cylindrical helical gear on the housing, and a second locking structure and a third locking structure are arranged on the housing and are respectively used for preventing the second seal nut and the adjusting nut which are arranged at two ends of the secondary driving cylindrical helical gear from rotating relative to the housing in a use state. According to the invention, the second sealing nut and the adjusting nut are arranged, the bearing clearance of the second-stage driving cylindrical helical gear can be adjusted and installed through the length of the second sealing nut and the adjusting nut which are screwed into the shell, and the second locking structure and the third locking structure enable the second sealing nut and the adjusting nut to be fixed relative to the shell in a use state, so that the sealing effect of the invention is further improved, and the lubricating oil leakage is avoided.
In conclusion, the beneficial effects of the invention are as follows: the invention adopts two-stage speed reduction, has high transmission efficiency, simple speed reduction structure, simple shell structure and small total weight, does not need to open a hole with larger diameter on the shell or arrange the part of the shell for installing the speed reduction gear into two parts for installing the speed reducer assembly, and has higher rigidity of the shell and lower cost compared with the prior art.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a sectional view B-B of fig. 1.
Fig. 3 is an exploded perspective view of the housing of the present invention.
Fig. 4 is an exploded perspective view of the housing of the present invention at another angle.
Fig. 5 is a partial sectional view of the internal structure of the reducer case of the present invention.
Wherein: 1. a housing; 2. a primary driving cylindrical helical gear; 3. a ball bearing; 4. an O-shaped sealing ring; 5. a first locking structure; 6. a first seal nut; 7. a single row tapered roller bearing; 8. a second seal nut; 9. a second driving cylindrical helical gear; 10. a primary passive cylindrical helical gear; 11. hexagonal flange face bolts; 12. adjusting the nut; 13. a third locking structure; 14. a first hexagon head nut; 15. a secondary driven cylindrical helical gear; 16. a differential bearing; 17. a differential assembly; 18. a differential bearing adjusting nut; 19. a second hexagon head nut; 20. a nut locking plate; 21. a bearing cap; 22. a bearing cap mounting bolt; 23. a reducer housing; 24. combining oil seals; 25. an oil sump; 26. a first oil passage; 27. a second oil passage; 28. an oil hole; 29. a second locking structure; 30. a connecting flange; 31. a first mounting hole; 32. a second mounting hole; 33. a connecting plate; 34. a first fixing frame; 35. a second fixing frame; 36. a third mounting hole; 37. an upper groove; 38. a lower groove.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
The secondary speed reducer with differential assembly for the pure electric vehicle shown in fig. 1 to 5 comprises a shell 1, a speed reducer assembly and a differential assembly 17, wherein the shell 1 comprises a speed reducer shell 23, a connecting plate 33 and a differential shell, the speed reducer shell 23 and the differential shell are respectively positioned at two sides of the connecting plate 33 and are integrally formed with the connecting plate 33, the connecting plate 33 is circular and is used for being mounted on an axle of the pure electric vehicle in a use state, and the connecting plate 33 is provided with connecting holes which penetrate through two sides of the connecting plate and are communicated with the speed reducer shell 23; the reducer assembly is arranged on the reducer shell 23 and is used for being connected with an output shaft of the driving motor in a use state; a differential assembly 17 is mounted on the differential housing, wherein: one end of the differential assembly 17 is rotatably connected with the differential shell, the other end of the differential assembly 17 is detachably mounted on the shell through a bearing cover 21, the differential assembly 17 can rotate relative to the differential shell, the rotating speed and the torque of a driving motor are reduced and increased through the speed reducer assembly to drive the differential assembly 17 to rotate, and the differential assembly 17 is used for driving hubs at two ends of the same axle of the pure electric vehicle to rotate and providing a differential function required by the kinematics of the vehicle.
The speed reducer assembly comprises a primary driving cylindrical helical gear 2, a primary driven cylindrical helical gear 10, a secondary driving cylindrical helical gear 9 and a secondary driven cylindrical helical gear 15, wherein the primary driving cylindrical helical gear 2 is rotatably arranged in a speed reducer shell 23, one end of the primary driving cylindrical helical gear extends out of the speed reducer shell 23 and is used for being connected with a driving motor of an electric vehicle, a combined oil seal 24 is arranged between one end of the primary driving cylindrical helical gear 2, which is used for being connected with the driving motor, and the speed reducer shell 23 and is used for enhancing the sealing performance of the connection of the primary driving cylindrical helical gear 2 and the speed reducer shell 23, the combined oil seal 24 per se is the prior art, the invention is not detailed, the secondary driving cylindrical helical gear 9 is rotatably arranged in the speed reducer shell 23, the primary driven cylindrical helical gear 10 and the secondary driving cylindrical helical gear 9 synchronously rotate, and the primary driven cylindrical helical gear 10 is meshed with the primary driving cylindrical helical gear 2, a second-stage driven cylindrical helical gear 15 is detachably mounted on a differential mechanism assembly 17 by adopting a hexagonal flange face bolt 11 and is meshed with a second-stage driving cylindrical helical gear 9, a driving motor drives a first-stage driving cylindrical helical gear 2 to rotate, and the first-stage driven cylindrical helical gear 10 is meshed with the first-stage driving cylindrical helical gear 2, so that the first-stage driving cylindrical helical gear 2 drives the first-stage driven cylindrical helical gear 10 to rotate, the second-stage driving cylindrical helical gear 9 and the first-stage driven cylindrical helical gear 10 synchronously rotate at the moment and drive the second-stage driven cylindrical helical gear 15 to rotate, and the second-stage driven cylindrical helical gear 15 drives the differential mechanism assembly 17 to rotate.
In the invention, one end of a reducer shell 23 is provided with a connecting flange 30 for installing a driving motor in a use state, a first mounting hole 31 and a second mounting hole 32 are arranged on the reducer shell 23 along a direction parallel to the central line of the connecting flange 30, wherein the distance between the first mounting hole 31 and a connecting plate 33 is larger than the distance between the second mounting hole 32 and the connecting plate 33, a first-stage driving cylindrical helical gear 2 is rotatably installed in the first mounting hole 31 by adopting two ball bearings 3, wherein teeth of the first-stage driving cylindrical helical gear 2 are positioned between the two ball bearings 3, a second-stage driving cylindrical helical gear 2 is rotatably installed in the second mounting hole 32 by adopting two single-row conical roller bearings 7, one end of the reducer shell 23, which is far away from the first-stage driving cylindrical helical gear 2 and is used for connecting the driving motor, is provided with a first sealing nut 6, and the first sealing nut 6 is pressed against the outer ring of the ball bearing 3 on one side of the reducer shell 23, the first sealing nut 6 is provided with external threads, the speed reducer shell 23 is provided with a first threaded hole, the first threaded hole is overlapped with the central line of the primary driving cylindrical helical gear 2, the first sealing nut 6 extends into the first threaded hole and is in threaded fit with the first threaded hole and used for being detachably connected with the speed reducer shell 23, and the bearing clearance of the ball bearing 3 is adjusted to be within the optimal numerical range through the length of the first sealing nut 6 screwed into the first threaded hole.
According to the invention, the annular second oil channel 27 is formed on the outer surface of the first sealing nut 6, a plurality of oil holes 28 communicated with the second oil channel 27 are formed on the first sealing nut 6 along the circumferential direction, and lubricating oil in the speed reducer shell 23 enters the second oil channel 27 through the oil holes 28 and is used for lubricating and installing the ball bearing of the first-stage driving cylindrical helical gear. The present invention provides a first locking structure 5 on the reducer housing 23 for preventing the first gland nut 6 from rotating relative to the housing in use, the first locking structure 5 in the present invention being a first locking screw, a first screw hole is formed in the reducer shell 23 along the radial direction of a first seal nut 6, a first locking screw is arranged in the first screw hole and is in threaded fit with the first screw hole, the end part of the first locking screw props against and presses the first seal nut 6, the thread on the first seal nut 6 is positioned at one end far away from a driving motor, the surface of one side, close to the driving motor, of the first seal nut 6 is a smooth surface, a second oil duct 27 is formed in the smooth part of the first seal nut 6, in the use state, the position where the end of the first locking screw abuts against the first gland nut 6 is between the second oil channel 27 and the external thread on the first gland nut 6. According to the invention, the outer surface of the first seal nut 6 is provided with an annular seal groove, an O-shaped seal ring 4 is arranged in the seal groove to improve the sealing property of the first seal nut 6, and the seal groove is positioned between the first locking structure 5 and the second oil channel 27. According to the invention, after the bearing play of the ball bearing 3 is adjusted, the first sealing nut 6 is fixed by screwing the first locking screw, so that the first sealing nut 6 does not rotate in the using process and is relatively fixed with the shell 1.
When the invention is used, lubricating oil is filled in the axle housing, the first-stage driving cylindrical helical gear 2 and the two ball bearings 3 are lubricated by splashing lubrication formed by driving the lubricating oil by the rotation of the second-stage driven cylindrical helical gear 15, but because the height difference exists between the first-stage driving cylindrical helical gear 2 and the output shaft in the vertical direction, the problem that the installed ball bearing 3 is not lubricated enough due to the splash lubrication only can be caused, therefore, the oil collecting groove 25 is arranged in the speed reducer shell 23, one end of the oil collecting groove 25 is opened and the opening faces to the splashing direction of the lubricating oil when the whole vehicle advances, namely, the second-stage driven cylindrical helical gear 15 rotates to drive the lubricating oil to move along the tangential line under the advancing state of the whole vehicle, so that the splashed lubricating oil can be retained in the oil collecting tank 25, the oil collecting tank 25 is positioned between the first-stage driving cylindrical helical gear 2 and the connecting plate 33; the reducer casing 23 is provided with a first oil passage 26 communicated with the oil collecting groove 25, lubricating oil in the oil collecting groove 25 is used for lubricating the ball bearings 3 provided with the first-stage driving cylindrical helical gear 2 through the first oil passage 26, the number of the first oil passages 26 in the invention is two, and the two first oil passages 26 are respectively used for providing lubricating oil for the two ball bearings 3 so as to lubricate the two ball bearings 3.
The primary driven cylindrical helical gear 10 is sleeved on the secondary driving cylindrical helical gear 9 and is in spline fit with the secondary driving cylindrical helical gear 9, the secondary driving cylindrical helical gear 9 comprises a gear section, a spline section and connecting sections positioned at two ends, the two connecting sections are in interference fit with inner rings of two single-row tapered roller bearings 7 respectively, outer rings of the two single-row tapered roller bearings 7 are in interference fit with a reducer shell 23, the spline section is provided with an external spline, the primary driven cylindrical helical gear 10 is provided with an internal spline, and the internal spline of the primary driven cylindrical helical gear 10 is matched with the external spline of the secondary driving cylindrical helical gear 9. In the invention, two ends of an internal spline of a first-stage driven cylindrical helical gear 10 and two ends of an external spline of a second-stage driving cylindrical helical gear 9 are both provided with positioning spigots, the positioning spigots at the two ends of the internal spline are in transition fit with the positioning spigots at the two ends of the external spline to ensure that the first-stage driven cylindrical helical gear 10 and the second-stage driving cylindrical helical gear 9 coaxially and synchronously rotate, the second-stage driving cylindrical helical gear 9 and the first-stage driven cylindrical helical gear 10 are of a split structure, compared with the installation mode of hole/diameter interference fit adopted in the prior art, when the two are installed in a shell 1, a hole structure which is larger than the external diameter of the first-stage driven cylindrical helical gear 10 needs to be arranged on the shell 1, or the shell 1 is divided into two parts, no matter whether a hole with a large diameter is arranged or the shell 1 is made into two parts, the rigidity of the shell 1 is reduced, the size precision of the device is reduced and the weight of the device is increased, compared with the prior art that the process of machining the combined part is added when the shell 1 is made into two parts, the manufacturing cost caused by the process is reduced, and the gear tooth section is used for being meshed with the secondary driven cylindrical helical gear 15. In the invention, the inner ring of the single-row tapered roller bearing 7 positioned on one side of the primary driven cylindrical helical gear 10 is abutted against the primary driven cylindrical helical gear 10, so that the primary driven cylindrical helical gear 10 cannot axially float and is meshed with the tooth surface of the primary driving cylindrical helical gear 2, and the coaxiality of the primary driven cylindrical helical gear 10 and the secondary driving cylindrical helical gear 9 is further improved.
According to the invention, a second sealing nut 8 and an adjusting nut 12 which are in threaded fit with the speed reducer shell 23 are respectively arranged at two ends of the secondary driving cylindrical helical gear 9 on the speed reducer shell 23, and a second locking structure 29 and a third locking structure 13 are respectively arranged on the speed reducer shell 23 and are respectively used for preventing the second sealing nut 8 and the adjusting nut 12 which are arranged at two ends of the secondary driving cylindrical helical gear 9 from rotating relative to the speed reducer shell 23 in a use state. The second seal nut 8 and the first seal nut 6 are positioned on the same side of the reducer casing 23, the adjusting nut 12 is positioned on one side of the reducer casing 23 for connecting a driving motor, the second locking structure 29 and the first locking structure 5 have the same structure, and can particularly participate in the first locking structure 5, the third locking structure 13 is a locking plate locking mode, the end part of the adjusting nut 12 is provided with a plurality of first fixing grooves along the circumferential direction, the length direction of the first fixing grooves is the same as the radial direction of the adjusting nut 12, one end of the locking plate extends into the first fixing grooves, the other end of the locking plate is detachably arranged on the reducer casing 23 by adopting a first hexagonal nut 14, the first hexagonal nut 14 fixes the locking plate, the locking plate prevents the adjusting nut from rotating relative to the reducer casing 23 in a use state, the second seal nut 8 and the adjusting nut 12 respectively support against the end parts of the outer rings of two single-row conical bearings 7, for axially positioning the second driving cylindrical helical gear 9. According to the invention, the bearing play of the two single-row tapered roller bearings 7 is adjusted to be within the optimal numerical range by adjusting the lengths of the nuts 12 and the second seal nuts 8 screwed into the shell 1, the fixing mode of the second seal nuts 8 is the same as that of the first seal nuts 6, when the adjusting nuts 12 are adjusted, the locking plates of the first hexagonal-head nuts 14 and the third locking structures 13 are removed, after the adjusting nuts 12 are adjusted, the locking plates of the third locking structures 12 are installed on the shell 1 by adopting the first hexagonal-head nuts 14, and one ends of the locking plates, which are far away from the first hexagonal-head nuts 14, extend into the first fixing grooves of the adjusting nuts 12 to fix the adjusting nuts 12, so that the adjusting nuts do not rotate in the using process.
The differential assembly 17 of the present invention is prior art, the differential housing of the present invention includes a first fixing frame 34 and a second fixing frame 35, the first fixing frame 34 is opened with a third mounting hole 36 penetrating through two sides thereof, wherein the third mounting hole 36 is a stepped hole, the diameter of the third mounting hole 36 near one side of the second fixing frame 35 is smaller than that of the other side, one side of the second fixing frame 35 far from the connecting plate 33 is recessed towards the connecting plate 33 to form a semicircular upper groove 37, the bearing cap 21 of the present invention is mounted on the second fixing frame 35, the bearing cap 21 is provided with a semicircular lower groove 38, after the bearing cap 21 is mounted on the second fixing frame 35, the upper groove 37 is opposite to the lower groove 38 to form a through hole with a diameter equal to the diameter of the third mounting hole 36, two ends of the differential assembly 17 are respectively provided with a differential bearing 16, the inner ring of the differential bearing 16 is matched with the differential 17, the outer ring of the differential bearing 16 used for one end connected with the first fixing frame 34 is arranged in a third mounting hole 36 and is positioned in one end close to the second fixing frame 35 and is in interference fit with the third mounting hole 36, two sides of a lower groove 38 of a bearing cover 21 in the invention are respectively provided with a bearing cover mounting bolt 22, the bearing cover mounting bolts 22 penetrate through the bearing cover 21 and are in threaded fit with the second fixing frame 35, the outer ring of the differential bearing 16 used for being rotatably connected with the second fixing frame 35 is clamped in a through hole enclosed by the upper groove 37 and the lower groove 38, one end of the through hole far away from the first fixing frame 34 is provided with an internal thread, one end of the through hole far away from the first fixing frame 34 is provided with a differential bearing adjusting nut 18 in threaded fit with the differential bearing adjusting nut, the end part of the differential bearing adjusting nut 18 is provided with a second fixing groove, one side of the bearing cover 21 far away from the first fixing frame 34 is provided with an adjusting nut locking plate 20, the adjusting nut locking plate 20 is detachably mounted on the bearing cover 21 by adopting a second hexagon nut 19, one end of the adjusting nut locking plate 20 extends into the second fixing groove, and the differential bearing adjusting nut 18 is prevented from rotating in a use state.
When the differential assembly 17 is assembled, the bearing cover 21 is firstly disassembled, the differential assembly 17 with the secondary driven cylindrical helical gear 15 and the inner ring component of the differential bearing 16 are placed in the third mounting hole 36, the outer ring of the other differential bearing 16 is placed in the upper groove 37, the bearing cover 21 is arranged on the second fixing frame 35 by the bearing cover mounting nut 22, then the differential bearing adjusting nut 18 is screwed into the through hole, the differential bearing adjusting nut 18 is abutted against the outer ring of the differential bearing 16, the bearing clearance of the differential bearing 16 is adjusted to be within the optimal numerical range by the length of the differential bearing adjusting nut 18 screwed into the through hole, after the bearing clearance is adjusted, the adjusting nut locking plate 20 is detachably arranged on the bearing cover 21 by the second hexagon nut 19, and one end of the adjusting nut locking plate 20 far away from the second hexagon nut 19 extends into the second fixing groove at the end part of the differential bearing adjusting nut 18, so that the differential bearing adjusting nut 18 is used No rotation occurs during the process.
Parts which are not specifically described in the above description are prior art or can be realized by the prior art. The specific embodiments of the present invention are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. That is, all equivalent changes and modifications made according to the contents of the claims of the present invention should be regarded as the technical scope of the present invention.

Claims (10)

1. Pure electric motor car is with differential mechanism assembly in second reduction gear area, its characterized in that: the speed reducer comprises a shell (1), a speed reducer assembly and a differential assembly (17), wherein the shell (1) is used for being mounted on an axle of an electric vehicle in a use state; the reducer assembly is arranged on one side of the shell (1) and is used for being connected with an output shaft of the driving motor in a use state; a differential assembly (17) is mounted on the other side of the housing (1) for connecting the wheel hubs of the axles of the electric vehicle using half-shafts in use, wherein: one end of the differential assembly (17) is rotatably connected with the shell (1), the other end of the differential assembly is detachably mounted on the shell (1) through a bearing cover (21) and can rotate relative to the shell (1), the rotating speed and the torque of the driving motor are reduced and increased through the speed reducer assembly to drive the differential assembly (17) to rotate, and the differential assembly (17) is used for driving hubs at two ends of the same axle of the pure electric vehicle to rotate.
2. The secondary speed reducer with differential assembly for pure electric vehicles according to claim 1, characterized in that: the speed reducer assembly comprises a first-stage driving cylindrical helical gear (2), a first-stage driven cylindrical helical gear (10), a second-stage driving cylindrical helical gear (9) and a second-stage driven cylindrical helical gear (15), wherein the first-stage driving cylindrical helical gear (2) is rotatably installed in a shell (1), one end of the first-stage driving cylindrical helical gear extends out of the shell (1) and is used for being connected with a driving motor, the second-stage driving cylindrical helical gear (9) is rotatably arranged in the shell (1), the first-stage driven cylindrical helical gear (10) and the second-stage driving cylindrical helical gear (9) synchronously rotate, the first-stage driven cylindrical helical gear (10) is meshed with the first-stage driving cylindrical helical gear (2), and the second-stage driven cylindrical helical gear (15) is installed on a differential mechanism assembly (17) and is meshed with the second-stage driving cylindrical helical gear (9).
3. The secondary speed reducer with differential assembly for pure electric vehicles according to claim 2, characterized in that: an oil collecting groove (25) is formed in the shell (1), one end of the oil collecting groove (25) is opened, the opening faces the splashing direction of the lubricating oil when the whole vehicle moves forward, and the oil collecting groove is used for collecting the splashing lubricating oil when the whole vehicle moves forward.
4. The secondary speed reducer with differential assembly for pure electric vehicles according to claim 3, characterized in that: a first oil channel (26) communicated with the oil collecting groove (25) is formed in the shell (1), and lubricating oil in the oil collecting groove (25) is used for lubricating and installing a ball bearing of the first-stage driving cylindrical helical gear (2) through the first oil channel (26).
5. The secondary speed reducer with differential assembly for pure electric vehicles according to claim 2, characterized in that: the primary driven cylindrical helical gear (10) is sleeved on the secondary driving cylindrical helical gear (9) and is in spline fit with the secondary driving cylindrical helical gear (9).
6. The secondary speed reducer with differential assembly for pure electric vehicles according to claim 5, characterized in that: and the two ends of the inner spline of the one-stage driven cylindrical helical gear (10) and the two ends of the outer spline of the two-stage driving cylindrical helical gear (9) are respectively provided with a positioning spigot, and the positioning spigots at the two ends of the inner spline are in transition fit with the positioning spigots at the two ends of the outer spline.
7. The secondary speed reducer with differential assembly for pure electric vehicles according to claim 2, characterized in that: one end of the shell (1), which is far away from the primary driving cylindrical helical gear (2) and is used for being connected with a driving motor, is provided with a first sealing nut (6), and the first sealing nut (6) is provided with an external thread which is used for being in threaded fit with the shell (1).
8. The secondary speed reducer with differential assembly for pure electric vehicles according to claim 4, wherein: the outer surface of the first sealing nut (6) is provided with an annular second oil channel (27), and the first sealing nut (6) is provided with a plurality of oil holes (28) communicated with the second oil channel (27) along the circumferential direction for lubricating and installing a ball bearing of the primary driving cylindrical helical gear (2).
9. The secondary speed reducer with differential assembly for pure electric vehicles according to claim 7 or 8, characterized in that: a first locking structure (5) is arranged on the shell (1) and used for preventing the first sealing nut (6) from rotating relative to the shell (1) in a use state.
10. The secondary speed reducer with differential assembly for pure electric vehicles according to claim 2, characterized in that: the second sealing nut (8) and the adjusting nut (12) which are in threaded fit with the shell (1) are respectively arranged at two ends of the second-stage driving cylindrical helical gear (9) on the shell (1), and the second locking structure (29) and the third locking structure (13) are respectively arranged on the shell (1) and are used for preventing the second sealing nut (8) and the adjusting nut (12) which are arranged at two ends of the second-stage driving cylindrical helical gear (9) from rotating relative to the shell (1) in a use state.
CN202110623274.6A 2021-06-04 2021-06-04 Secondary speed reducer with differential mechanism assembly for pure electric vehicle Pending CN113251110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110623274.6A CN113251110A (en) 2021-06-04 2021-06-04 Secondary speed reducer with differential mechanism assembly for pure electric vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110623274.6A CN113251110A (en) 2021-06-04 2021-06-04 Secondary speed reducer with differential mechanism assembly for pure electric vehicle

Publications (1)

Publication Number Publication Date
CN113251110A true CN113251110A (en) 2021-08-13

Family

ID=77186463

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110623274.6A Pending CN113251110A (en) 2021-06-04 2021-06-04 Secondary speed reducer with differential mechanism assembly for pure electric vehicle

Country Status (1)

Country Link
CN (1) CN113251110A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023039333A1 (en) * 2021-09-07 2023-03-16 Atieva, Inc. Multi-motor electric-vehicle drive units

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023039333A1 (en) * 2021-09-07 2023-03-16 Atieva, Inc. Multi-motor electric-vehicle drive units

Similar Documents

Publication Publication Date Title
US20140148295A1 (en) Planetary gear device
CN110185748B (en) Integrated robot joint structure
CN113251110A (en) Secondary speed reducer with differential mechanism assembly for pure electric vehicle
CN110873168A (en) High-performance reduction gearbox of pure electric commercial vehicle
CN201142618Y (en) Gear reducer motor of hub
CN207634644U (en) A kind of main reducing gear band differential assembly for independent suspension
CN219888692U (en) Oil cooling lubricating structure of electric drive car differential mechanism
CN109737186B (en) Electronic equation motorcycle race wheel limit planetary gear decelerator
CN202338598U (en) Right-angled autorotation type oil-circulating-lubricating gear speed reducer
CN110962507B (en) Drive axle and vehicle with same
CN109695686B (en) Driving axle double-speed reducer structure with double bevel gears
CN215567692U (en) Double-flange planet hub bearing unit
CN214999148U (en) Secondary speed reducer with differential mechanism assembly for pure electric vehicle
CN207297755U (en) The hub reduction gear of grease separation lubrication
CN214984620U (en) Parallel shaft type electric drive integrated bridge
CN209557592U (en) A kind of automobile and its wheel side planetary gear speed reducing mechanism
CN113199908A (en) Parallel shaft type electric drive integrated bridge
CN210318407U (en) Integrated robot joint structure
CN112762146A (en) Electric driving wheel with planetary speed reduction transmission
CN112780747A (en) Front axle differential mechanism shell and front axle differential mechanism of four-wheel drive vehicle
CN208997276U (en) A kind of deceleration output mechanism of gearbox
CN107237863B (en) Driving wheel with adjustable gear clearance
CN213808789U (en) Transition connecting device for tractor gearbox
CN215444941U (en) Industrial robot's planetary reducer
CN213322514U (en) Articulated formula tipper wheel reduction gear and 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