CN112303137A - Ball cage type constant velocity universal transmission shaft assembly with ball spline pair in amphibious - Google Patents
Ball cage type constant velocity universal transmission shaft assembly with ball spline pair in amphibious Download PDFInfo
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- CN112303137A CN112303137A CN202010545712.7A CN202010545712A CN112303137A CN 112303137 A CN112303137 A CN 112303137A CN 202010545712 A CN202010545712 A CN 202010545712A CN 112303137 A CN112303137 A CN 112303137A
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- 238000007789 sealing Methods 0.000 claims abstract description 128
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- 238000003825 pressing Methods 0.000 claims description 11
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- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
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- 238000000071 blow moulding Methods 0.000 abstract description 4
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- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000003570 air Substances 0.000 description 22
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
- F16D3/06—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow axial displacement
- F16D3/065—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow axial displacement by means of rolling elements
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
- F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
- F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
- F16D3/845—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers allowing relative movement of joint parts due to the flexing of the cover
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
- F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
- F16D3/845—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers allowing relative movement of joint parts due to the flexing of the cover
- F16D2003/846—Venting arrangements for flexible seals, e.g. ventilation holes
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
Abstract
A ball cage type constant velocity universal drive shaft assembly with an amphibious middle belt ball spline pair is used for power transmission. The middle part is of a ball spline pair structure, universal joints at two ends adopt a ball cage type, and tower-shaped sealing covers and breathable waterproof devices are arranged at two ends of a ball cage body of each universal joint. The invention can improve the aerodynamic state in the transmission shaft, is favorable for heat dissipation, and reduces the influence of air pressure factors on the sliding resistance; by using the ball spline structure, the sliding resistance can be reduced, the friction heating is reduced, and the telescopic requirement of the length change of the universal joint is quickly responded; the thermoplastic elastomer material is used for replacing the traditional chloroprene rubber material sealing cover, the technical limit of a blow molding process is broken through, the blow molding-grade thermoplastic elastomer material tower-shaped sealing cover with the diameter larger than 150mm can be developed, and the tower-shaped sealing covers at two ends adopt different wave forms according to different functional requirements; adopt two or above sealed cowlings mounting grooves, but reasonable adjustment sealed cowling axial mounted position promotes the different operating mode adaptability of same sealed cowling.
Description
Technical Field
The invention relates to the technical field of coupling transmission, in particular to a ball cage type constant velocity universal transmission shaft assembly which is suitable for two working conditions of water and land and is provided with a ball spline pair in the middle.
Background
The transmission shaft is used as a key part of a power transmission system, and the reliability of the universal joint is particularly important. The existing failure mode, potential failure mode, influence and occurrence probability grade of the ball cage type constant velocity universal joint are comprehensively and carefully analyzed, and the analysis result shows that the sealing cover is broken and the ball cage body is sintered to be the failure mode with the highest risk grade of the ball cage type constant velocity universal joint and should be preferentially controlled.
The main reason of ball cage body sintering is that high temperature generates heat and arouses, and generate heat and spherical pair's friction is directly relevant, and the friction of spherical pair mainly receives the influence of frictional force, and the source of frictional force has two aspects: firstly, the moment of torsion of rzeppa constant velocity universal joint work rotation transmission, secondly the additional axial force of rzeppa constant velocity universal joint during flexible work. The torque of the rzeppa constant velocity universal joint during working rotation is input by a power system and is a normal bearing force required by the rzeppa constant velocity universal joint; the additional axial force generated when the rzeppa universal joint is stretched and contracted during working is harmful additional force generated inside, and is reduced as much as possible. From the additional stress analysis of friction heating of the spherical pair causing the sintering of the ball cage body, the telescopic resistance of the middle spline is known to be a main factor causing additional friction heat to be generated by the spherical side of the ball cage body retainer and also an important adverse factor limiting the work adaptability of the ball cage type constant velocity universal joint. The transmission shaft used in the current market generally adopts a telescopic form of a middle spline pair structure.
Simultaneously, the rzeppa universal joint is in the use, because the sealed rotation and the fitting surface friction at inside universal joint fitting surface position, can cause the rzeppa universal joint to generate heat, lead to sealed inside gas temperature to rise, inside atmospheric pressure rises, if generate heat and can not make sealed inside gas outgoing after inside atmospheric pressure rises, then inside atmospheric pressure can surpass the sealed cowling deformation strength, cause the sealed cowling to take place to interfere with other objects in outside after the unusual atress or the inflation, in the use like this, can cause the sealed cowling to damage the inefficacy. Therefore, the transmission shaft needs to exhaust in the use process, and simultaneously, the waterproof and dustproof effects are achieved, so that water or foreign matters cannot enter the universal joint, and the lubricating state of the universal joint is damaged. Common ventilating devices in modern industrial production comprise air holes, one-way air valves, air valve switches and the like. In a mechanical equipment vent pipeline, the ventilating devices are mostly used in an atmospheric working environment, although the ventilating devices can effectively exhaust gas, the reverse waterproof effect is poor, the application range of the ventilating devices is greatly limited, and particularly for the ball cage type constant velocity universal joint used in some vehicle wheel side driving under a wading working environment, hot air pressure generated by friction heating of the universal joint during driving is exhausted out of a cavity, so that the inside of the cavity of the universal joint is balanced with the ambient air pressure, and the normal use of the universal joint is guaranteed; and water enters the inner part of the universal joint to destroy the inner lubricating environment of the universal joint under the water running environment of the rzeppa universal joint, so that the universal joint is prevented from being abnormally operated and losing efficacy. The currently used ventilators do not meet the above requirements.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the rzeppa constant velocity universal drive shaft assembly with the amphibious intermediate belt ball spline pair, so as to meet the requirements of a drive system on increasingly severe use conditions of a universal joint, reduce the failure rate of the rzeppa constant velocity universal joint and improve the reliability of the rzeppa constant velocity universal joint.
In order to realize the aim, the middle of the ball-cage constant-velocity universal transmission shaft is of a ball spline pair structure, universal joints at two ends adopt a ball cage type, and two ends of a ball cage body of each universal joint are provided with a tower-shaped sealing cover and a breathable waterproof device; the tower-shaped sealing cover is made of a thermoplastic elastomer, the appearance of the tower-shaped sealing cover I is of a variable-diameter wave-shaped structure, two ends of the tower-shaped sealing cover I are respectively fixed on the ball cage body and the shaft head, the appearance of the tower-shaped sealing cover II is of a wave-shaped structure combining equal diameter and variable diameter, the small end of the tower-shaped sealing cover II is of an equal-diameter ring and is transited to the large end through variable diameter, and two ends of the tower-shaped sealing cover II are respectively fixed on the ball cage body and the ball; the sealing cover of the breathable waterproof device is respectively connected with the inner holes of the first outer sleeve and the second outer sleeve in an intimate mode through vulcanized rubber, the pressing ring is clamped in the annular groove of the sealing cover, the hole blocking ring for limiting the axial position of the pressing ring is clamped in the inner groove of the annular outer boss of the sealing cover, the air vent is arranged in the sealing cover, the annular gap of the sealing cover and the air vent form an exhaust passage, the opening of the rubber diaphragm is inwards filled into the sealing cover, the annular inner boss of the sealing cover and the pressing ring extrude the rubber diaphragm, the rubber diaphragm generates deformation tension, the hot air pressure in the cavity of the universal joint can be discharged, and water can be prevented from entering the cavity.
The power of the ball spline shaft pair is input from the end of the ball spline shaft, the ball spline shaft is inserted in the ball spline sleeve, a plurality of rows of raceways are processed on the ball spline shaft and the ball spline sleeve, the raceways are circular, elliptical or kidney-shaped, a ball retainer is arranged between the ball spline shaft and the ball spline sleeve, the ball retainer is axially provided with a ball hole corresponding to the raceways, balls are embedded in the ball hole and roll along the raceways, so that the torque transmission and the telescopic sliding of the ball spline shaft pair are realized, and the shaft head and the ball spline sleeve are welded into a whole to realize the power output of the ball spline shaft pair; through holes for keeping air pressure balance between the inside of the ball spline pair and connecting parts at two sides, reducing sliding resistance caused by air pressure change and realizing weight reduction are processed in the centers of the shaft head and the ball spline shaft; the hole retainer ring is arranged in a retainer ring groove of the ball spline housing, and a first shaft retainer ring and a second shaft retainer ring which are used for limiting the ball retainer and ensuring that balls always work at proper positions are arranged on two sides of a raceway of the ball spline shaft; the spindle head and the excircle of the ball spline housing are provided with two or more than two sealing installation grooves along the axial direction, and the sealing installation grooves are used for installing a small opening end of a tower-shaped sealing cover and a small opening end of a tower-shaped sealing cover.
The large opening end and the inner bushing I of the tower-shaped sealing cover I are both provided with an inner boss and an outer groove, an inner hole at the small opening end of the tower-shaped sealing cover I is provided with an arc-shaped bulge, the inner bushing I is arranged in the outer groove of the outer bushing I, and the large opening end and the small opening end of the tower-shaped sealing cover I are respectively arranged on the outer groove of the inner bushing I and the shaft diameter of the shaft head and are tightened by a large clamp I and a small clamp I; the large-opening end and the inner bushing II of the tower-shaped sealing cover II are both provided with an inner boss and an outer groove, an inner hole at the small-opening end of the tower-shaped sealing cover II is provided with a circular arc-shaped bulge, the inner bushing II is arranged in the groove at the outer circle of the outer bushing II, and the large-opening end and the small-opening end of the tower-shaped sealing cover II are respectively arranged on the outer groove of the inner bushing II and the outer circle of the ball spline sleeve and are tightened by a large clamp II and a small clamp II.
The compression ring of the breathable waterproof device is of a circular structure, and the bottom of the breathable waterproof device is provided with a boss for extruding the annular part of the rubber diaphragm; the rubber diaphragm is of a U-shaped flat bottom structure, the thickness of the flat bottom diaphragm part is 0.95-1.05mm, and the thickness of the annular part is 2.85-2.95 mm; one side of the sealing cover is provided with an annular inner boss and an annular outer boss, an annular groove for mounting the pressure ring is formed between the annular inner boss and the annular outer boss, and an annular gap is formed between the inner ring surface of the annular outer boss and the bottom surface of the annular groove; when the difference value of the internal and external air pressure of the tower-shaped sealing cover I and the tower-shaped sealing cover II reaches 0.006-0.009 MPa, the rubber diaphragm generates deformation tension, and the gas in the universal joint is discharged from the vent hole along the annular gap, so that the internal and external air pressures of the tower-shaped sealing cover I and the tower-shaped sealing cover II are balanced.
A steel ball is arranged between the inner ring and the outer ring of the ball cage body, the steel ball is arranged in a window of the retainer, and the retainer is embedded between the inner ring and the outer ring; the inner ring of the universal joint at the side of the ball spline shaft is arranged on the ball spline shaft, and the outer ring is arranged in the outer sleeve II; the inner ring of the universal joint at the shaft head side is arranged on the shaft head, and the outer ring is arranged in the first outer sleeve.
The invention improves the structure of the middle telescopic shaft, adopts the middle ball spline pair, improves the stress and the use state of the sealing cover by changing the material and the structure of the sealing cover, realizes the obvious reduction of the rupture risk of the sealing cover, is combined with a breathable waterproof device for use, can not only discharge hot air pressure generated by friction heating of the universal joint during driving out of a cavity, but also prevent water from entering the universal joint to damage the internal lubricating environment of the universal joint under the underwater operation environment of the rzeppa universal joint, thereby causing abnormal working failure of the universal joint and greatly improving the operation reliability of the universal joint.
Compared with the prior art, the invention has the following advantages:
1. the device can work under two working conditions of water and land.
2. The ball spline pair structure is applied to the ball cage type constant velocity universal joint, so that the sliding resistance of the middle telescopic shaft can be reduced (under the same working condition, because the rolling friction is much smaller than the maximum static friction and the sliding friction, under the general condition, the rolling friction only has 1/40 to 1/60 of the sliding friction resistance) to the harmful additional axial force generated by the ball cage type constant velocity universal joint, the friction heating of the inner spherical pair is reduced, and the telescopic requirement of the working length change of the ball cage type constant velocity universal joint can be flexibly and quickly responded.
3. When the vehicle is violently jolted and the instantaneous angle of the universal joint is too large, the bowl-shaped seal is easy to cause extrusion damage faults, and the tower-shaped seal can be structurally more suitable for larger corner requirements than the bowl-shaped seal. Because the universal energy-saving universal sealing cover is suitable for a large-torque working condition, has a large specification and a large model, is limited by a blow molding process technology, a blow molding thermoplastic elastomer tower-shaped sealing cover with the diameter larger than 150mm is not developed in China, and the application example of the tower-shaped sealing cover with the same grade is provided in the field of transmission.
4. Compared with the traditional sealing cover made of chloroprene rubber, the sealing cover made of the thermoplastic elastomer has remarkable advantages in the aspects of hardness, tear strength, ageing resistance, high-speed centrifugal expansion, high-temperature and low-temperature performances and the like. The hardness of thermoplastic elastomer material is the plastics rank, adopts thermoplastic elastomer material can make the sealed cowling when the abominable road conditions is gone, resists the damage and the small breach that external silt and rubble splash etc. caused and leads to the torn problem of sealed cowling extension.
5. Due to the excellent performances of the thermoplastic elastomer material such as tear resistance, high-speed eccentricity and the like, the ball spline pair structure can greatly reduce harmful additional axial force, effectively reduce friction heating of the constant-speed ball cage universal joint, greatly improve the torque bearing capacity of the constant-speed ball cage universal joint, and enable the universal joint to adapt to higher use rotating speed in an energy-saving manner by virtue of the factors.
6. The bowl shape of comparing is sealed, and the turriform sealed cowling makes the inside die cavity of ball cage constant velocity universal joint bigger, simultaneously, through the through-hole at spindle nose and ball spline shaft center, can further increase the inside die cavity of ball cage constant velocity universal joint with the inside die cavity intercommunication of ball cage constant velocity universal joint on both sides. Due to the excellent sealing performance of the sealing cover, the larger cavity can balance the air pressure difference between the inside and the outside generated in the use of the universal joint as much as possible, the aerodynamic state inside the transmission shaft is improved, the heat dissipation is facilitated, and the influence of the air pressure factor on the middle telescopic sliding resistance is further reduced.
7. Because spindle nose and ball spline housing excircle have two or above seal cover mounting grooves, can be according to pivot angle, the flexible demand of difference, the axial mounted position (precompression or pretension) of reasonable adjustment seal cover, the form when making the seal cover big pivot angle is more reasonable, has improved the stress state when the seal cover is big pivot angle, is flexible greatly, has promoted the adaptability of same kind of seal cover under different use condition, practices thrift the design development cost of excessively developing the seal cover.
8. The two end sealing covers can be designed into different fold numbers (lengths) and wave forms according to different swing angles and telescopic requirements of the sealing covers at the two ends of the universal joint, so that the sealing covers at the two ends can obtain respective better stress forms when swinging angles and telescopic.
9. Due to the combined use of the breathable waterproof device and the tower-shaped sealing cover, when the difference value between the internal pressure and the external pressure of the sealing cover reaches 0.006-0.009 MPa, the high-pressure hot gas in the cavity can be effectively discharged for pressure relief, the internal pressure value of the sealing cover is controlled, the internal pressure and the external pressure of the sealing cover are balanced, the sealing cover cannot expand in the use process, the influence of the high-pressure hot gas on a mechanical equipment body part is reduced, the service lives of the sealing cover, the mechanical equipment, a rzeppa synchronous universal transmission shaft and the like are prolonged, and the maintenance or replacement cost is reduced; meanwhile, the water can be automatically prevented from entering the rzeppa synchronous universal transmission shaft used on a water and land amphibious vehicle, so that the water is controlled to enter running mechanical equipment, the corrosion rate of parts is reduced, the internal lubricating environment of the universal joint is protected, the transmission resistance is reduced, and the working requirement of the equipment in a special environment is met.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a schematic view of the tower seal housing of fig. 1.
Fig. 3 is a schematic structural view of the tower-shaped seal cover ii of fig. 1.
Fig. 4 is a structure view of an installation groove at two ends of a small-mouth end of the tower-shaped sealing cover in fig. 1.
Fig. 5 is a schematic view of the construction of the waterproof and breathable apparatus of fig. 1.
Detailed Description
As shown in fig. 1, 2, 3, 4 and 5, the ball spline pair structure is arranged in the middle of the rzeppa constant velocity universal drive shaft, the universal joints at two ends adopt a rzeppa type, and tower-shaped sealing covers and air-permeable waterproof devices 20 are arranged at two ends of a rzeppa body 19 of the universal joint. The invention adopts the middle ball spline pair, improves the stress and the use state of the sealing cover by changing the material and the structure of the sealing cover so as to realize the obvious reduction of the rupture risk of the sealing cover, is combined with the breathable waterproof device 20 for use, can not only discharge the hot air pressure generated by friction heating of the universal joint during driving out of a cavity, but also prevent the abnormal working failure of the universal joint caused by the water entering the universal joint to destroy the lubricating environment in the universal joint under the underwater operation environment of the ball cage type constant velocity universal joint, and greatly improves the operation reliability of the universal joint.
The tower-shaped sealing cover is made of a thermoplastic elastomer, compared with the traditional sealing cover made of chloroprene rubber, the tower-shaped sealing cover made of the thermoplastic elastomer has remarkable advantages in the aspects of hardness, tear strength, ageing resistance, high-speed centrifugal expansion, high and low temperature performance and the like, the main performance comparison of chloroprene rubber CR and thermoplastic elastomer TPEE is shown in a table 1, the tower-shaped sealing cover is a blow molding thermoplastic elastomer tower-shaped sealing cover 2 with the large end diameter larger than 150mm, and the tower-shaped sealing cover is originated in the field of transmission; the tower-shaped sealing cover 2 can enable the inner cavity of the constant velocity universal joint of the ball cage to be larger, the larger cavity can balance the air pressure difference between the inside and the outside generated in the use of the universal joint as much as possible, the aerodynamic state in the transmission shaft is improved, the heat dissipation is facilitated, the influence of the air pressure factor on the sliding resistance of the telescopic shaft pair 23 is further reduced, and the structure can adapt to the larger corner requirement; the tower-shaped sealing covers at the two ends can be designed into different fold numbers (lengths) and wave forms according to different swing angles and telescopic requirements of the tower-shaped sealing covers at the two ends of the universal joint, so that the tower-shaped sealing covers at the two ends can obtain better stress forms when swinging angles and telescopic. The tower-shaped sealing cover I4 is of a variable-diameter wave-shaped structure, D11 is larger than D12 is larger than D13 is larger than D14 is larger than D15, and the diameter D1 of the large end is larger than 150 mm; the tower-shaped sealing cover II 15 is in a wave-shaped structure combining equal diameter and variable diameter, the small end is an equal diameter ring and is transited to the large end through variable diameter, D21= D22= D23 < D24 < D25 < D26 < D27 < D28, and the diameter D2 of the large end is more than 150 mm; the large-opening end and the inner bushing I3 of the tower-shaped sealing cover I4 are both provided with an inner boss and an outer groove, an inner hole at the small-opening end of the tower-shaped sealing cover I4 is provided with an arc-shaped bulge, the inner bushing I3 is arranged in the outer groove of the outer sleeve I1, and the large-opening end and the small-opening end of the tower-shaped sealing cover I4 are respectively arranged on the outer groove of the inner bushing I3 and the shaft diameter of the shaft head 6 and are tightly hooped by a large hoop I2 and a small hoop I5; the large opening end and the inner bushing II 16 of the tower-shaped sealing cover II 15 are both provided with an inner boss and an outer groove, an inner hole at the small opening end of the tower-shaped sealing cover II 15 is provided with an arc-shaped bulge, the inner bushing II 16 is arranged in the outer groove of the outer bushing II 18, and the large opening end and the small opening end of the tower-shaped sealing cover II 15 are respectively arranged on the outer groove of the inner bushing II 16 and the outer circle of the ball spline sleeve 7 and are clamped tightly by a large clamp II 17 and a small clamp II 11.
The sealing cover 24 of the breathable waterproof device 20 is tightly connected with the inner holes of the first outer sleeve 1 and the second outer sleeve 18 through vulcanized rubber 25 respectively; the press ring 22 is of a circular ring structure, and the bottom of the press ring is provided with a boss 29 for extruding the annular part 34 of the rubber diaphragm 23; the rubber diaphragm 23 is of a U-shaped flat bottom structure, the thickness of the flat bottom diaphragm part 33 is 0.95-1.05mm, and the thickness of the annular part 34 is 2.85-2.95mm, so that the rubber diaphragm 23 can form required tension when the rubber diaphragm 23 is pressed and deformed, and can form required tight fit with the binding surface of the sealing cover 24, and a good water sealing effect is achieved; one side of the sealing cover 24 is provided with a circular inner boss 28 and a circular outer boss 30, an annular groove for mounting the pressure ring 22 is formed between the circular inner boss 28 and the circular outer boss 30, and an annular gap 27 is positioned between the inner ring surface of the circular outer boss 30 and the bottom surface of the annular groove; the other side of the sealing cover 24 is provided with a circular boss 31 and a central boss 32, the vulcanized rubber 25 is arranged on the outer circular surface of the circular boss 31, the vent hole 26 is positioned at the axis of the central boss 32, when the difference value of the internal and external air pressure of the tower-shaped sealing cover I4 and the tower-shaped sealing cover II 15 reaches 0.006-0.009 MPa, the rubber diaphragm 23 generates deformation tension, the gas in the universal joint is discharged from the vent hole 26 and the exhaust channel formed by the annular gap 27, so that the internal and external air pressure of the tower-shaped sealing cover I4 and the tower-shaped sealing cover II 15 is balanced, and the number of the exhaust channels can be determined according to the required exhaust effect; the pressing ring 22 is clamped in an annular groove of the sealing cover 24, a hole retainer ring 21 used for limiting the axial position of the pressing ring 22 is clamped in an inner groove of an annular outer boss 30 of the sealing cover 24, a vent hole 26 is arranged in the sealing cover 24, an annular gap 27 of the sealing cover 24 and the vent hole 26 form an exhaust passage, an opening of the rubber diaphragm 23 is inwards installed in the sealing cover 24, and an annular inner boss 28 of the sealing cover 24 and the pressing ring 22 extrude the rubber diaphragm 23 to enable the rubber diaphragm 23 to generate deformation tension, so that the hot air pressure in the cavity of the universal joint can be discharged, and water can be prevented from entering the cavity.
The power of the ball spline shaft pair is input from the end of the ball spline shaft 12, the ball spline shaft 12 is inserted in the ball spline housing 7, a plurality of rows of raceways are processed on the ball spline shaft 12 and the ball spline housing 7, the raceways are circular, elliptical or kidney-shaped, a ball retainer 10 is arranged between the ball spline shaft 12 and the ball spline housing 7, the ball retainer 10 is axially provided with a ball hole corresponding to the raceways, balls 9 are embedded in the ball hole and roll along the raceways, so that the torque transmission and the telescopic sliding of the ball spline shaft pair are realized, and the shaft head 6 and the ball spline housing 7 are welded into a whole to realize the power output of the ball spline shaft pair; through holes are processed in the centers of the shaft head 6 and the ball spline shaft 12, internal cavities of the ball cage type constant velocity universal joints at two sides are communicated, the internal cavities of the ball cage type constant velocity universal joints can be further increased, the internal aerodynamic state of a transmission shaft is improved, the air pressure balance between the internal part of the ball spline pair and connecting parts at two sides is kept, the heat dissipation is facilitated, the influence of air pressure factors on middle telescopic sliding resistance can be further reduced, and the weight reduction can be realized; the hole retainer ring 13 is arranged in a retainer ring groove of the ball spline housing 7 and used for limiting the ball spline shaft 12 from slipping out of the ball spline housing 7, and a first shaft retainer ring 8 and a second shaft retainer ring 14 are arranged on two sides of a raceway of the ball spline shaft 12 and can limit the ball retainer 10 to ensure that the balls 9 always work at proper positions; the outer circles of the shaft head 6 and the ball spline housing 7 are axially provided with two or more than two sealing installation grooves for installing a small opening end of a tower-shaped sealing cover I4 and a small opening end of a tower-shaped sealing cover II 15, the axial installation positions (pre-compression or pre-stretching) of the tower-shaped sealing cover can be reasonably adjusted according to different swing angles and stretching requirements, the swing angle of the sealing cover is improved, the stress state during stretching is improved, the form of the tower-shaped sealing cover during large swing angle is more reasonable, the adaptability of the same tower-shaped sealing cover under different use working conditions is improved, and the design and development cost of the tower-shaped sealing cover is saved.
A steel ball is arranged between the inner ring and the outer ring of the ball cage body 19, the steel ball is arranged in a window of a retainer, and the retainer is embedded between the inner ring and the outer ring; the inner ring of the universal joint at the side of the ball spline shaft 12 is arranged on the ball spline shaft 12, and the outer ring is arranged in the second outer sleeve 18; the inner ring of the universal joint on the side of the shaft head 6 is arranged on the shaft head 6, and the outer ring is arranged in the first outer sleeve 1.
TABLE 1 comparison of the principal Properties of Neoprene CR with thermoplastic elastomer TPEE
Claims (5)
1. The utility model provides an area ball spline is vice in middle of amphibian rzeppa constant velocity universal drive shaft assembly which characterized in that: the middle of the ball-cage type constant-velocity universal transmission shaft is of a ball spline pair structure, universal joints at two ends adopt a ball cage type, and two ends of a ball cage body (19) of each universal joint are provided with a tower-shaped sealing cover and a breathable waterproof device (20); the tower-shaped sealing cover is made of thermoplastic elastomer, the appearance of the tower-shaped sealing cover I (4) is of a variable-diameter wave-shaped structure, two ends of the tower-shaped sealing cover I are respectively fixed on the ball cage body (19) and the shaft head (6), the appearance of the tower-shaped sealing cover II (15) is of a wave-shaped structure combining equal diameter and variable diameter, the small end of the tower-shaped sealing cover II is of an equal-diameter ring and is transited to the large end through variable diameter, and two ends of the tower-shaped sealing cover II (15) are respectively fixed on the ball cage body (19) and the ball spline sleeve (7); a sealing cover (24) of the breathable waterproof device (20) is tightly connected with inner holes of a first outer sleeve (1) and a second outer sleeve (18) through vulcanized rubber bodies (25), a pressing ring (22) is clamped in an annular groove of the sealing cover (24), a hole retaining ring (21) used for limiting the axial position of the pressing ring (22) is clamped in an inner groove of an annular outer boss (30) of the sealing cover (24), a vent hole (26) is formed in the sealing cover (24), an annular gap (27) of the sealing cover (24) and the vent hole (26) form an exhaust passage, an opening of a rubber diaphragm (23) is inwards installed in the sealing cover (24), an annular inner boss (28) of the sealing cover (24) and the pressing ring (22) form extrusion on the rubber diaphragm (23), the rubber diaphragm (23) generates deformation tension, hot air pressure in a universal joint cavity can be discharged, and water can be prevented from entering the cavity.
2. An amphibious birfield constant velocity universal drive shaft assembly with ball spline pairs as claimed in claim 1 wherein: the power of the ball spline shaft pair is input from the end of the ball spline shaft (12), the ball spline shaft (12) is inserted in the ball spline sleeve (7), a plurality of rows of raceways are processed on the ball spline shaft (12) and the ball spline sleeve (7), the raceways are circular, elliptical or kidney-shaped, a ball retainer (10) is arranged between the ball spline shaft (12) and the ball spline sleeve (7), the ball retainer (10) is axially provided with ball holes corresponding to the raceways, balls (9) are embedded in the ball holes and roll along the raceways to realize the torque transmission and the telescopic sliding of the ball spline shaft pair, and the shaft head (6) and the ball spline sleeve (7) are welded into a whole to realize the power output of the ball spline shaft pair; through holes for keeping air pressure balance between the inside of the ball spline pair and connecting parts at two sides, reducing sliding resistance caused by air pressure change and realizing weight reduction are processed in the centers of the shaft head (6) and the ball spline shaft (12); a hole retainer ring (13) is arranged in a retainer ring groove of the ball spline housing (7), and a first shaft retainer ring (8) and a second shaft retainer ring (14) which are used for limiting the ball retainer (10) and ensuring that balls (9) always work at proper positions are arranged on two sides of a raceway of the ball spline shaft (12); the outer circles of the shaft head (6) and the ball spline housing (7) are provided with two or more than two sealing installation grooves used for installing the small opening end of the tower-shaped sealing cover I (4) and the small opening end of the tower-shaped sealing cover II (15) along the axial direction.
3. An amphibious birfield constant velocity universal drive shaft assembly with ball spline pairs as claimed in claim 1 wherein: the large-opening end and the inner bushing I (3) of the tower-shaped sealing cover I (4) are both provided with an inner boss and an outer groove, an inner hole at the small-opening end of the tower-shaped sealing cover I (4) is provided with an arc-shaped bulge, the inner bushing I (3) is arranged in an outer circle groove of the outer bushing I (1), the large-opening end and the small-opening end of the tower-shaped sealing cover I (4) are respectively arranged on the outer groove of the inner bushing I (3) and the shaft diameter of the shaft head (6), and are hooped by a large hoop I (2) and a small hoop I (5); the large-opening end and the inner bushing II (16) of the tower-shaped sealing cover II (15) are both provided with an inner boss and an outer groove, an inner hole at the small-opening end of the tower-shaped sealing cover II (15) is provided with an arc-shaped bulge, the inner bushing II (16) is arranged in an outer circle groove of the outer bushing II (18), and the large-opening end and the small-opening end of the tower-shaped sealing cover II (15) are respectively arranged on the outer groove of the inner bushing II (16) and the outer circle of the ball spline sleeve (7) and are hooped by a large hoop II (17) and a small hoop II (11).
4. An amphibious birfield constant velocity universal drive shaft assembly with ball spline pairs as claimed in claim 1 wherein: the pressing ring (22) of the breathable waterproof device (20) is of a circular structure, and the bottom of the pressing ring is provided with a boss (29) for extruding the annular part (34) of the rubber diaphragm (23); the rubber diaphragm (23) is of a U-shaped flat bottom structure, the thickness of the flat bottom diaphragm part (33) is 0.95-1.05mm, and the thickness of the annular part (34) is 2.85-2.95 mm; one side of the sealing cover (24) is provided with an annular inner boss (28) and an annular outer boss (30), an annular groove for mounting the pressure ring (22) is formed between the annular inner boss (28) and the annular outer boss (30), and an annular gap (27) is formed between the inner ring surface of the annular outer boss (30) and the bottom surface of the annular groove; the other side of the sealing cover (24) is provided with a circular boss (31) and a central boss (32), vulcanized rubber (25) is arranged on the outer circular surface of the circular boss (31), the vent hole (26) is positioned at the axis of the central boss (32), when the difference value between the internal and external air pressures of the tower-shaped sealing cover I (4) and the tower-shaped sealing cover II (15) reaches 0.006-0.009 MPa, the rubber diaphragm (23) generates deformation tension, and the gas in the universal joint is discharged from the vent hole (26) along the annular gap (27), so that the internal and external air pressures of the tower-shaped sealing cover I (4) and the tower-shaped sealing cover II (15) are balanced.
5. An amphibious birfield constant velocity universal drive shaft assembly with ball spline pairs as claimed in claim 1 wherein: a steel ball is arranged between the inner ring and the outer ring of the ball cage body (19), the steel ball is arranged in a window of the retainer, and the retainer is embedded between the inner ring and the outer ring; the inner ring of the universal joint at the side of the ball spline shaft (12) is arranged on the ball spline shaft (12), and the outer ring is arranged in the outer sleeve II (18); the inner ring of the universal joint on the side of the shaft head (6) is arranged on the shaft head (6), and the outer ring is arranged in the outer sleeve I (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010545712.7A CN112303137A (en) | 2020-06-16 | 2020-06-16 | Ball cage type constant velocity universal transmission shaft assembly with ball spline pair in amphibious |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010545712.7A CN112303137A (en) | 2020-06-16 | 2020-06-16 | Ball cage type constant velocity universal transmission shaft assembly with ball spline pair in amphibious |
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| CN112303137A true CN112303137A (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010545712.7A Withdrawn CN112303137A (en) | 2020-06-16 | 2020-06-16 | Ball cage type constant velocity universal transmission shaft assembly with ball spline pair in amphibious |
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| CN (1) | CN112303137A (en) |
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| JPH07167155A (en) * | 1993-12-15 | 1995-07-04 | Suzuki Motor Corp | Joint construction for four-wheel drive vehicle |
| CN201184374Y (en) * | 2008-03-06 | 2009-01-21 | 襄樊市博亚机械有限公司 | Ball cage synchronous universal drive shaft |
| CN101526137A (en) * | 2008-03-06 | 2009-09-09 | 襄樊市博亚机械有限公司 | Venting and waterproof device and manufacture method thereof |
| CN105351381A (en) * | 2015-12-15 | 2016-02-24 | 天津市环宇橡塑股份有限公司 | CVJ dust cover arranged at drive shaft expansion end and having eight-crest structure |
| CN205226128U (en) * | 2015-12-15 | 2016-05-11 | 天津市环宇橡塑股份有限公司 | Drive shaft stiff end CVJ dust cover with single bead structure |
| CN206338339U (en) * | 2016-12-31 | 2017-07-18 | 浙江向隆机械有限公司 | A kind of constant velocity driving shaft |
| CN108026977A (en) * | 2015-10-27 | 2018-05-11 | Ntn株式会社 | Fixed-type constant-velocity Hooks coupling universal coupling and bearing apparatus for wheel |
| CN212318570U (en) * | 2020-06-16 | 2021-01-08 | 襄阳博亚精工装备股份有限公司 | Ball cage type constant velocity universal transmission shaft assembly with ball spline pair in amphibious |
-
2020
- 2020-06-16 CN CN202010545712.7A patent/CN112303137A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07167155A (en) * | 1993-12-15 | 1995-07-04 | Suzuki Motor Corp | Joint construction for four-wheel drive vehicle |
| CN201184374Y (en) * | 2008-03-06 | 2009-01-21 | 襄樊市博亚机械有限公司 | Ball cage synchronous universal drive shaft |
| CN101526137A (en) * | 2008-03-06 | 2009-09-09 | 襄樊市博亚机械有限公司 | Venting and waterproof device and manufacture method thereof |
| CN108026977A (en) * | 2015-10-27 | 2018-05-11 | Ntn株式会社 | Fixed-type constant-velocity Hooks coupling universal coupling and bearing apparatus for wheel |
| CN105351381A (en) * | 2015-12-15 | 2016-02-24 | 天津市环宇橡塑股份有限公司 | CVJ dust cover arranged at drive shaft expansion end and having eight-crest structure |
| CN205226128U (en) * | 2015-12-15 | 2016-05-11 | 天津市环宇橡塑股份有限公司 | Drive shaft stiff end CVJ dust cover with single bead structure |
| CN206338339U (en) * | 2016-12-31 | 2017-07-18 | 浙江向隆机械有限公司 | A kind of constant velocity driving shaft |
| CN212318570U (en) * | 2020-06-16 | 2021-01-08 | 襄阳博亚精工装备股份有限公司 | Ball cage type constant velocity universal transmission shaft assembly with ball spline pair in amphibious |
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Application publication date: 20210202 |