CN113090742B - Intermediate axle main speed reducer assembly with improved lubrication system - Google Patents
Intermediate axle main speed reducer assembly with improved lubrication system Download PDFInfo
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- CN113090742B CN113090742B CN202110345237.3A CN202110345237A CN113090742B CN 113090742 B CN113090742 B CN 113090742B CN 202110345237 A CN202110345237 A CN 202110345237A CN 113090742 B CN113090742 B CN 113090742B
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 22
- 238000005461 lubrication Methods 0.000 title claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 230000009467 reduction Effects 0.000 claims description 54
- 230000005540 biological transmission Effects 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 4
- 210000003739 neck Anatomy 0.000 claims description 4
- 241000239290 Araneae Species 0.000 claims 3
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 128
- 239000010687 lubricating oil Substances 0.000 description 47
- 230000000694 effects Effects 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/037—Gearboxes for accommodating differential gearings
-
- 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
- F16H57/0482—Gearings with gears having orbital motion
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention relates to a middle axle main reducer assembly with an improved lubrication system, wherein an oil receiving groove is formed on a shell of a reducer corresponding to a driven bevel gear, a first oil duct is formed on the shell of the reducer, an oil baffle plate which is connected with the shell of the reducer in a sealing way is arranged at the rear end of a first rear end bearing, a closed annular space is formed between the oil baffle plate and the first rear end bearing, and the first oil duct is communicated with the oil receiving groove and the annular space; the shell is subtracted and still is formed with oil storage tank, first oil collecting tank and second oil duct on the shell, and the oil storage tank is located passive cylindrical gear's bottom, and first oil collecting tank corresponds to set up in initiative cylindrical gear's periphery, and the inner wall upper end of gear lid is formed with the oil guide groove that extends to first front end bearing, and second oil duct intercommunication oil guide groove and first oil collecting tank, the lower extreme of gear lid are equipped with second oil collecting tank and third oil duct, and the one end and the second oil collecting tank intercommunication of third oil duct, the other end extend to second front end bearing top. The system can fully lubricate the gears and the bearings in the running process of the automobile, and prolongs the service life of the intermediate axle main speed reducer assembly.
Description
Technical Field
The invention relates to the technical field of automobile drive axles, in particular to a middle axle main speed reducer assembly with an improved lubrication system.
Background
At present, in the field of automobile drive axles, in a main speed reducer assembly of a middle axle, a main shaft transmits kinetic energy of an engine to a rear axle through an inter-axle differential, and meanwhile, the main shaft and a drive bevel gear are meshed with each other through a pair of cylindrical gears to synchronously transmit the kinetic energy to an inter-wheel differential of the middle axle, and then to wheels to drive a vehicle to advance. The main shaft, the inter-axle differential and the drive bevel gear are all arranged in the shell reduction through the bearings. Because the transmission parts are more and more scattered, the traditional main speed reducer assembly of the middle axle has the problem that lubricating oil cannot sufficiently lubricate gears and bearings, so that the gears and the bearings fail prematurely, the lubrication efficiency is reduced, and the like.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a middle axle main speed reducer assembly with an improved lubrication system, so as to solve the problem of poor lubrication effect of the existing speed reducer assembly.
The technical scheme for solving the technical problems is as follows:
A middle axle main reducer assembly with an improved lubrication system comprises a reduction shell, a gear cover, a main shaft, an inter-axle differential, a driving cylindrical gear and a driven cylindrical gear which are connected with each other, and also comprises an inter-wheel differential arranged outside the reduction shell; the driving cylindrical gear and the inter-axle differential are sequentially arranged on the main shaft from front to back, the front end of the driving cylindrical gear is provided with a first front end bearing, the first front end bearing is limited in the shell through a gear cover, and the rear end of the inter-axle differential is provided with a first rear end bearing; the two ends of the driven cylindrical gear are respectively arranged on the shell reduction through a second front end bearing and a second rear end bearing, a driving bevel gear is arranged at the rear end of the driven cylindrical gear, a driven bevel gear is fixedly arranged on the inter-wheel differential mechanism, and the driving bevel gear is meshed with the driven bevel gear for transmission;
The shell reduction device comprises a shell reduction shell, wherein an oil receiving groove is formed in the shell reduction shell and corresponds to a driven bevel gear, a first oil duct is formed in the shell reduction shell, an oil baffle plate which is connected with the shell reduction shell in a sealing mode is arranged at the rear end of a first rear end bearing, a closed annular space is formed between the oil baffle plate and the first rear end bearing, and the first oil duct is communicated with the oil receiving groove and the annular space;
the gear cover is characterized in that an oil storage tank, a first oil collecting tank and a second oil duct are further formed in the shell, the oil storage tank is located at the bottom of the driven cylindrical gear, the first oil collecting tank is correspondingly arranged at the periphery of the driving cylindrical gear, the upper end of the inner wall of the gear cover is provided with an oil guiding tank extending to the first front end bearing, the second oil duct is communicated with the oil guiding tank and the first oil collecting tank, the lower end of the gear cover is provided with a second oil collecting tank and a third oil duct, and one end of the third oil duct is communicated with the second oil collecting tank, and the other end of the third oil duct extends to the upper portion of the second front end bearing.
Preferably, an oil retainer is further arranged on an opening of the differential case facing the second rear end bearing, the oil retainer is coaxially arranged with the second rear end bearing, one end of the oil retainer is in airtight connection with an outer ring of the second rear end bearing through the shell reduction, and the other end of the oil retainer is in airtight connection with an end portion of the differential case.
Preferably, the inner wall of the shell is matched with the inter-axle differential, the driving cylindrical gear and the driven cylindrical gear.
Preferably, the inter-axle differential comprises a differential shell, a cross shaft, a planetary gear and a rear half-shaft bevel gear, wherein the cross shaft, the planetary gear and the rear half-shaft bevel gear are arranged in the differential shell, the rear half-shaft bevel gear is coaxially arranged with the main shaft, the end part of the main shaft penetrates through the axis of the cross shaft and stretches into the end part of the rear half-shaft bevel gear, the main shaft is connected with the cross shaft through a key, and the end part of the main shaft is in running fit with the end part of the rear half-shaft bevel gear; the four shaft necks of the cross shaft are perpendicular to the main shaft, each shaft neck of the cross shaft is provided with a planetary gear, the planetary gears can rotate, and the rear half shaft bevel gear is meshed with all the planetary gears; the side face, facing the cross shaft, of the driving cylindrical gear is provided with a bevel gear face, and the bevel gear face is meshed with the planetary gear.
Preferably, a bushing is arranged on the periphery of the end part of the main shaft, and the end part of the main shaft is in running fit with the end part of the rear half-shaft bevel gear through the bushing.
Preferably, the driving cylindrical gear is connected with the main shaft through a spline.
Preferably, the driven cylindrical gear is connected with the gear shaft through a spline.
Preferably, the gear cover is disposed above the second front end bearing.
The beneficial effects of the invention are as follows: the oil path of the lubrication system is as follows: during running of the vehicle, the driven bevel gear rotates to throw lubricating oil into the oil receiving groove, the lubricating oil enters the annular space through the first oil duct, and along with the rotation of the inter-axle differential, the lubricating oil enters the inter-axle differential after passing through the first rear end bearing, flows out from the opening at the other end of the inter-axle differential and flows into the oil storage groove through the second rear end bearing; the driven cylindrical gear is meshed with the driving cylindrical gear for transmission, and lubricating oil is thrown to the first oil collecting groove; the lubricating oil flows to the oil guide groove of the gear cover through the second oil duct and flows to the first front end bearing, and the lubricating oil continues to be collected downwards by the second oil collecting groove and finally flows to the second front end bearing through the third oil duct. The intermediate axle main speed reducer assembly of the improved lubrication system realizes lubrication of all transmission parts of the intermediate axle main speed reducer assembly, can automatically fully lubricate gears and bearings in the running process of an automobile, has a good lubrication effect, and prolongs the service life of the intermediate axle main speed reducer assembly.
Drawings
FIG. 1 is a cross-sectional view of the primary perspective of the present invention;
FIG. 2 is a second cross-sectional view of the main view of the present invention;
FIG. 3 is a cross-sectional view of the present invention from a depression;
FIG. 4 is a schematic view of the internal structure of the invention with the crust removed;
FIG. 5 is a schematic view of a shell-reducing structure of the present invention;
FIG. 6 is a schematic view of the oil slinger of the present invention;
fig. 7 is a schematic view of the gear cover structure of the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. The oil-collecting device comprises a shell, 101, an oil receiving groove, 102, a first oil duct, 103, an oil baffle, 104, an oil retainer, 105, a first oil collecting groove, 106, a second oil duct, 2, an inter-axle differential, 201, a rear axle bevel gear, 202, a cross shaft, 203, a planetary gear, 204, a bushing, 205, a differential case, 3, a main shaft, 4, a driving cylindrical gear, 401, a bevel gear face, 5, a first rear end bearing, 6, a first front end bearing, 7, a gear shaft, 8, a driven cylindrical gear, 9, a driving bevel gear, 10, a second front end bearing, 11, a second rear end bearing, 12, a gear cover, 1201, an oil guiding groove, 1202, a second oil collecting groove, 1203, a third oil duct, 13, an inter-wheel differential, 1301, a driven bevel gear, a, an annular space, b and an oil storage groove.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
As shown in fig. 1 to 7, a middle axle final drive assembly with an improved lubrication system comprises a reduction housing 1, a gear cover 12, a main shaft 3, an inter-axle differential 2, a driving cylindrical gear 4 and a driven cylindrical gear 8 which are connected with each other, and an inter-wheel differential 13 arranged outside the reduction housing 1; the driving cylindrical gear 4 and the inter-axle differential 2 are sequentially arranged on the main shaft 3 from front to back, a first front end bearing 6 is arranged at the front end of the driving cylindrical gear 4, the first front end bearing 6 is limited in the reduction shell 1 through a gear cover 12, and a first rear end bearing 5 is arranged at the rear end of the inter-axle differential 2; two ends of the driven cylindrical gear 8 are respectively arranged on the shell reduction 1 through a second front end bearing 10 and a second rear end bearing 11, a driving bevel gear 9 is arranged at the rear end of the driven cylindrical gear 8, a driven bevel gear 1301 is fixedly arranged on the inter-wheel differential 13, and the driving bevel gear 9 is meshed with the driven bevel gear 1301 for transmission;
The oil receiving groove 101 is formed in the shell reduction 1 corresponding to the driven bevel gear 1301, a first oil duct 102 is formed in the shell reduction 1, an oil baffle plate 103 which is connected to the shell reduction 1 in a sealing mode is mounted at the rear end of the first rear end bearing 5, a closed annular space a is formed between the oil baffle plate 103 and the first rear end bearing 5, and the first oil duct 102 is communicated with the oil receiving groove 101 and the annular space a;
The gear cover is characterized in that an oil storage tank b, a first oil collecting tank 105 and a second oil duct 106 are further formed in the shell reducing 1, the oil storage tank b is located at the bottom of the driven cylindrical gear 8, the first oil collecting tank 105 is correspondingly arranged on the periphery of the driving cylindrical gear 4, an oil guiding tank 1201 extending to the first front end bearing 6 is formed at the upper end of the inner wall of the gear cover 12, the second oil duct 106 is communicated with the oil guiding tank 1201 and the first oil collecting tank 105, a second oil collecting tank 1202 and a third oil duct 1203 are arranged at the lower end of the gear cover 12, one end of the third oil duct 1203 is communicated with the second oil collecting tank 1202, and the other end of the third oil duct 1203 extends to the upper side of the second front end bearing 10.
More specifically, in the intermediate axle main reducer assembly, the inter-axle differential 2, the driving cylindrical gear 4 and the first front end bearing 6 are coaxially sleeved on the main shaft 3 in sequence, one end of the inter-axle differential 2 is in transmission connection with one end of the main shaft 3, and the other end of the main shaft 3 penetrates through the shell reduction 1. The other end of the inter-axle differential 2 is a rear bevel gear 201 extending out of the housing of the inter-axle differential 2. The first rear end bearing 5 is sleeved on the rear half shaft bevel gear 201, the first rear end bearing 5 is arranged close to the housing of the inter-axle differential 2, and the first rear end bearing 5, the shell reduction and the housing of the inter-axle differential 2 are mutually matched to form an oil passing channel of lubricating oil. The shaft hole of the driving cylindrical gear 4 is connected with the periphery of the main shaft 3 through a spline, and the driving cylindrical gear 4 can rotate at the same speed as the main shaft 3. The main shaft 3 penetrates through the gear cover 12, and the gear cover 12 is fixedly connected with the shell reduction 1 and is abutted against the first front end bearing 6, so that the first front end bearing 6 is limited on the shell reduction 1. Specifically, the gear cover 12 is provided with a stepped hole coaxially arranged with the first front end bearing 6, the first front end bearing 6 is embedded into the stepped hole, and the outer ring of the first front end bearing 6 abuts against the gear cover 12. The main shaft 3 is provided with an annular step, and one side of the annular step, which is away from the gear cover 12, on the first front end bearing 6 is abutted against the inner ring of the first front end bearing 6 so as to axially limit the first front end bearing 6.
The driven cylindrical gear 8 is provided with a gear shaft 7, and the gear shaft 7 is arranged below the main shaft 3 in parallel. The second rear end bearing 11, the driven cylindrical gear 8, and the second front end bearing 10 are coaxially sleeved on the outer periphery of the gear shaft 7 in sequence. The shaft hole of the driven cylindrical gear 8 is connected with the peripheral key of the gear shaft 7 through a spline, so that the driven cylindrical gear 8 can rotate at the same speed as the gear shaft 7. The rear end of the gear shaft 7 penetrates through the shell reduction 1, and the end part of the gear shaft 7 extending out of the shell reduction 1 is fixedly connected with the drive bevel gear 9 in a coaxial manner. The inter-wheel differential 13 is rotatably connected to the reduction housing 1 by a flange extending from the reduction housing 1. A driven bevel gear 1301 is fixedly arranged on the shell of the inter-wheel differential 13, the driving bevel gear 9 is meshed with the driven bevel gear 1301, and when the driving bevel gear 9 rotates, the inter-wheel differential 13 is driven to rotate.
One end of the inter-axle differential 2, which is opposite to the main shaft 3, penetrates through the reduction case 1, namely, an opening is formed in the reduction case 1 at a position close to the rear half-shaft bevel gear 201. The inner wall of the opening of the shell 1 is provided with an oil receiving groove 101, and the oil receiving groove 101 is arranged towards a driven bevel gear 1301 of the inter-wheel differential 13. The shell reduction 1 is also provided with a first oil duct 102 communicated with the oil groove 101. The shape of the reduction case 1 is adapted to the shape of the rear bevel shaft gear 201. The shell reduction 1 is further provided with an oil baffle 103, the rear bevel gear 201 penetrates through the oil baffle 103, the shell reduction 1 and the first rear end bearing 5 are matched with each other to form a closed annular space a, and the first oil duct 102 is communicated with the oil receiving groove 101 and the annular space a. The lubricating oil is applied to the driven bevel gear 1301 of the inter-wheel differential 13, and the lubricating oil is thrown into the oil receiving groove 101 on the inner wall of the reduction case 1 when the driven bevel gear 1301 rotates at high speed, and the lubricating oil flows into the annular space a between the oil baffle plate 103 and the first rear end bearing 5 through the first oil passage 102. When the lubricating oil accumulates in the annular space a and the liquid level rises to a certain height, the lubricating oil lubricates the first rear end bearing 5 through the fit clearance between the inner ring and the outer ring of the first rear end bearing 5. Simultaneously, as the rear half shaft bevel gear 201 rotates, lubricating oil is brought into the inter-axle differential 2, all transmission parts inside the inter-axle differential 2 are lubricated, and redundant lubricating oil flows out through an opening of the housing of the inter-axle differential 2 matched with the main shaft 3.
The shape of the inner wall of the shell reduction 1 is matched with the shape of the driving cylindrical gear 4 and the shape of the driven cylindrical gear 8, and an oil storage tank b is formed at the bottom of the driven cylindrical gear 8. After flowing out of the housing of the inter-axle differential 2, the lubricating oil flows down along the inner wall of the reduction housing 1 and gradually accumulates in the oil reservoir b at the bottom of the passive spur gear 8. During the downward flow of the lubricating oil along the inner wall of the reduction housing 1, the lubricating oil passes through the second rear end bearing 11 on the gear shaft 7 and lubricates it. The bottom of the driven cylindrical gear 8 is soaked in lubricating oil, and when the driven cylindrical gear 8 rotates at a high speed, the lubricating oil is driven to the driving cylindrical gear 4 to lubricate the driving cylindrical gear; the driving spur gear 4 then throws the lubricating oil out onto its circumferentially directed reduction housing 1 during high-speed rotation.
As shown in fig. 1 and fig. 5, the shell 1 is provided with a first oil collecting groove 105 near the outer periphery of the driving cylindrical gear 4, the first oil collecting groove 105 may be provided as one or a plurality of first oil collecting grooves, the edge of each first oil collecting groove 105 is provided with an oil baffle for blocking the downward flow of the lubricating oil, and the first oil collecting groove 105 is provided with a second oil duct 106. The upper end of the inner wall of the gear cover 12 is provided with an oil guiding groove 1201, the second oil duct 106 communicates the first oil collecting groove 105 with the oil guiding groove 1201, and the oil guiding groove 1201 extends to the first front end bearing 6. The driving cylindrical gear 4 throws out the lubricating oil to the first oil sump 105 on the reduction case 1, and the lubricating oil collected in the first oil sump 105 flows to the oil guide groove 1201 on the gear cover 12 through the second oil passage 106, and flows down to the first front end bearing 6 along the oil guide groove 1201, lubricating the first front end bearing 6 on the main shaft 3.
As shown in fig. 1, 3 and 7, the gear cover 12 is disposed above the second front end bearing 10. The lower end of the inner wall of the gear cover 12 is provided with a second oil collecting groove 1202, the edge of the second oil collecting groove 1202 is provided with an oil baffle for blocking the outflow of lubricating oil, a third oil duct 1203 is arranged in the second oil collecting groove 1202, and the third oil duct 1203 extends to the upper side of the second front end bearing 10. After the lubricating oil on the gear cover 12 lubricates the first front end bearing 6, the excessive lubricating oil flows down along the inner wall of the gear cover 12, is collected by the second oil collecting groove 1202, is guided to the inner wall of the shell reduction 1 above the second front end bearing 10 through the third oil duct 1203, and flows down onto the second front end bearing 10 along the shell reduction 1 to lubricate it.
In this embodiment, as shown in fig. 1 and 6, an oil retainer 104 is further provided on an opening of the differential case 205 facing the first rear end bearing 5, the oil retainer 104 is coaxially disposed with the first rear end bearing 5, one end of the oil retainer 104 is hermetically connected to an outer ring of the first rear end bearing 5 through the case reduction 1, and the other end of the oil retainer 104 is hermetically connected to an end of the differential case 205. The arrangement of the oil retainer 104 firstly plays a role in sealing between the differential case 205 and the first rear end bearing 5, prevents lubricating oil from flowing down through a gap between the differential case 205 and the first rear end bearing 5, reduces the amount of lubricating oil entering the inter-axle differential 2, and reduces the lubricating effect; secondly, the lubricating oil is guided, the oil retainer 104 corresponds to a pipeline, and after the lubricating oil flows out of the first rear end bearing 5, the lubricating oil directly flows into the differential case 205 through the oil retainer 104 to lubricate the transmission components in the inter-axle differential 2.
In this embodiment, the inter-axle differential 2 includes a differential case 205, and a cross 202, a planetary gear 203, and a rear bevel gear 201 disposed in the differential case 205, where the rear bevel gear 201 is disposed coaxially with the main shaft 3, an end of the main shaft 3 penetrates through an axis of the cross 202 and extends into an end of the rear bevel gear 201, the main shaft 3 is keyed to the cross 202, and an end of the main shaft 3 is rotationally matched with an end of the rear bevel gear 201; four journals of the cross 202 are perpendicular to the main shaft 3, each journal of the cross 202 is provided with a planetary gear 203, each planetary gear 203 can rotate, and the rear half-shaft bevel gear 201 is meshed with all the planetary gears 203; the side of the drive spur gear 4 facing the cross 202 is provided with a bevel gear surface 401, and the bevel gear surface 401 meshes with all the planetary gears 203.
The main shaft 3 serves as both a transmission member and a support member of the inter-axle differential 2. When the main shaft 3 rotates, the cross shaft 202 is driven to revolve, the planetary gears 203 on the cross shaft 202 are meshed with the rear half-shaft bevel gear 201, the rear half-shaft bevel gear 201 is driven to rotate, and the rear half-shaft bevel gear 201 is connected with a driving shaft of a rear axle through a spline and drives at the same speed. The bevel gear surface 401 on the main shaft 3 and the rear half shaft bevel gear 201 are respectively meshed with the planetary gears 203, when the planetary gears 203 rotate, the inter-axle differential speed is realized, and the differential speed running between the intermediate axle and the rear axle can be realized. When lubricating oil enters the differential case 205 from the end of the inter-axle differential 2 near the rear side bevel gear 201, all of the four planetary gears 203 can be lubricated due to the engagement of the rear side bevel gear 201 with the planetary gears 203 and the revolution of the planetary gears 203; moreover, the planetary gear 203 is meshed with the bevel gear surface 401 on the side surface of the cylindrical gear on the main shaft 3, so that the bevel gear surface 401 on the side surface of the cylindrical gear can be lubricated. Excess lubrication oil flows out from the opening in the differential case 205 near the main shaft 3.
In this embodiment, a bushing 204 is provided on the outer periphery of the end of the main shaft 3 extending into the rear half shaft, and the end of the main shaft 3 is in running fit with the end of the rear half shaft bevel gear 201 through the bushing 204. The supporting rigidity of the inter-axle differential 2 is increased by the supporting of the rear side gear by the main shaft 3 through the bushing 204, and the reliability of the meshing of the rear side bevel gear 201 with the planetary gears 203 on the cross 202 is also enhanced by the supporting of the cross 202 by the main shaft 3. The lubricating oil flows from the end of the rear bevel shaft 201 to the end of the main shaft 3 and the bushing 204, and lubricates the three.
Working principle:
During the running process of the vehicle, the main shaft 3 transmits the torque of the engine to the main speed reducer assembly, and the kinetic energy is transmitted to the drive bevel gear 9 through the meshing of the drive cylindrical gear 4 and the driven cylindrical gear 8; the drive bevel gear 9 meshes with a driven bevel gear 1301 on the housing of the inter-wheel differential 13, thereby transmitting kinetic energy to the wheels on both sides of the intermediate axle through the inter-wheel differential 13. Applying lubricating oil to a driven bevel gear 1301 on the inter-wheel differential 13, throwing the lubricating oil into an oil receiving groove 101 on the reduction case 1 when the driven bevel gear 1301 rotates at a high speed, enabling the lubricating oil to flow into an annular space a on the other side of the oil baffle plate 103 through a first oil passage 102 in the oil receiving groove 101, and lubricating the first rear end bearing 5 after the lubricating oil in the annular space a is accumulated to a higher liquid level; when the rear half shaft bevel gear 201 runs, lubricating oil is driven to enter the oil retainer 104 and the inter-axle differential 2, transmission components in the inter-axle differential 2 are lubricated, and then excessive lubricating oil flows out from the opening at the other end of the outer shell of the inter-axle differential 2 until flowing into an oil storage tank b below the driven cylindrical gear 8; in the process that the lubricating oil flows downwards to the oil storage tank b, the lubricating oil passes through the rear gear of the drive bevel gear 9 and lubricates the rear gear; when the driven cylindrical gear 8 operates, the lubricating oil in the oil storage tank b is driven to the driving cylindrical gear 4, the lubricating oil is thrown out to the first oil collecting tank 105 on the shell reduction 1 in the circumferential direction of the driving cylindrical gear 4 during operation, the second oil duct 106 in the first oil collecting tank 105 guides the lubricating oil to the oil guide groove 1201 on the inner wall of the gear cover 12, the lubricating oil flows to the first front end bearing 6 in the oil guide groove 1201 and lubricates the first front end bearing, then the redundant lubricating oil in the oil guide groove 1201 is converged into the second oil collecting tank 1202 at the lower end of the gear cover 12, flows to the shell reduction 1 above the second front end bearing 10 through the third oil duct 1203 in the second oil collecting tank 1202, and then continuously flows downwards along the shell reduction 1 to the second front end bearing 10 and lubricates the second front end bearing, so that all transmission components of the main reducer assembly of the intermediate axle are lubricated. The system has the advantages that the gear and the bearing of the main speed reducer assembly of the middle axle are fully lubricated, the lubrication effect is good, and the service life of the main speed reducer assembly of the middle axle is prolonged.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (7)
1. A middle axle final drive assembly with an improved lubrication system is provided, wherein,
Comprises a shell, a gear cover, a main shaft, an interaxial differential mechanism, a driving cylindrical gear and a driven cylindrical gear which are connected with each other, the shell reduction is a speed reducer shell, and the inner wall of the shell reduction is matched with the inter-axle differential, the driving cylindrical gear and the driven cylindrical gear; the differential mechanism is arranged outside the shell reduction and between wheels; the driving cylindrical gear and the inter-axle differential are sequentially arranged on the main shaft from front to back, the front end of the driving cylindrical gear is provided with a first front end bearing, the first front end bearing is limited in the shell through a gear cover, and the rear end of the inter-axle differential is provided with a first rear end bearing; an oil retainer ring is further arranged on an opening, facing the first rear end bearing, of the outer shell of the inter-axle differential, one end of the oil retainer ring is in airtight connection with the outer ring of the first rear end bearing through the shell reduction, and the other end of the oil retainer ring is in airtight connection with the end part of the inter-axle differential; the two ends of the driven cylindrical gear are respectively arranged on the shell reduction through a second front end bearing and a second rear end bearing, a driving bevel gear is arranged at the rear end of the driven cylindrical gear, a driven bevel gear is fixedly arranged on the inter-wheel differential mechanism, and the driving bevel gear is meshed with the driven bevel gear for transmission;
The shell reduction device comprises a shell reduction shell, wherein an oil receiving groove is formed in the shell reduction shell and corresponds to a driven bevel gear, a first oil duct is formed in the shell reduction shell, an oil baffle plate which is connected with the shell reduction shell in a sealing mode is arranged at the rear end of a first rear end bearing, a closed annular space is formed between the oil baffle plate and the first rear end bearing, and the first oil duct is communicated with the oil receiving groove and the annular space;
the gear cover is characterized in that an oil storage tank, a first oil collecting tank and a second oil duct are further formed in the shell, the oil storage tank is located at the bottom of the driven cylindrical gear, the first oil collecting tank is correspondingly arranged at the periphery of the driving cylindrical gear, the upper end of the inner wall of the gear cover is provided with an oil guiding tank extending to the first front end bearing, the second oil duct is communicated with the oil guiding tank and the first oil collecting tank, the lower end of the gear cover is provided with a second oil collecting tank and a third oil duct, and one end of the third oil duct is communicated with the second oil collecting tank, and the other end of the third oil duct extends to the upper portion of the second front end bearing.
2. A mid-axle final drive assembly as set forth in claim 1, wherein said oil retainer is coaxially disposed with said first rear end bearing.
3. The final drive assembly with an improved lubrication system according to claim 1, wherein said inter-axle differential includes a differential housing and a spider, planetary gears and a rear bevel gear disposed within said differential housing, said rear bevel gear being coaxially disposed with said main shaft, an end of said main shaft extending through an axle center of said spider and into an end of said rear bevel gear, said main shaft being keyed to said spider, an end of said main shaft being in rotational engagement with an end of said rear bevel gear; the four shaft necks of the cross shaft are perpendicular to the main shaft, each shaft neck of the cross shaft is provided with a planetary gear, the planetary gears can rotate, and the rear half shaft bevel gear is meshed with all the planetary gears; the side face, facing the cross shaft, of the driving cylindrical gear is provided with a bevel gear face, and the bevel gear face is meshed with the planetary gear.
4. A final drive assembly as set forth in claim 3 wherein said main shaft end is peripherally provided with a bushing through which said main shaft end is in rotational engagement with said rear bevel gear end.
5. A final drive assembly as set forth in claim 1 wherein said drive spur gear is splined to said main shaft.
6. The intermediate axle final drive assembly with an improved lubrication system as recited in claim 1, wherein said driven spur gear has a gear shaft thereon, said driven spur gear being splined to said gear shaft.
7. A mid-axle final drive assembly as set forth in claim 1 having an improved lubrication system, wherein said gear cover is disposed above said second front end bearing.
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| CN116066544A (en) * | 2021-11-01 | 2023-05-05 | 蔚然（南京）动力科技有限公司 | Gearbox |
| CN114607748A (en) * | 2022-03-10 | 2022-06-10 | 一汽解放汽车有限公司 | Inter-axle differential, intermediate axle inter-axle differential assembly and vehicle |
| CN117386798B (en) * | 2023-12-13 | 2024-03-15 | 中国第一汽车股份有限公司 | Driving axle lubricating structure, driving axle assembly and vehicle |
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| JPH10306868A (en) * | 1997-04-30 | 1998-11-17 | Hino Motors Ltd | Lubrication device for inter axle differential |
| CN203348512U (en) * | 2013-06-25 | 2013-12-18 | 东风德纳车桥有限公司 | Communicated double drive axle multi-point lubricating system |
| JP6379828B2 (en) * | 2014-08-05 | 2018-08-29 | スズキ株式会社 | Power transmission device |
| CN205371580U (en) * | 2015-12-22 | 2016-07-06 | 常州市瑞泰工程机械有限公司 | Hydraulic driving axle gear box |
| CN205278242U (en) * | 2016-01-07 | 2016-06-01 | 四川建安工业有限责任公司 | Main reducer assembly behind electric automobile |
| CN110748622B (en) * | 2019-10-17 | 2021-10-01 | 一汽解放汽车有限公司 | A middle axle final reducer assembly with rear bevel gear clutch mechanism |
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