CN112303139A - Breathable, waterproof and sealing combined structure of universal joint - Google Patents
Breathable, waterproof and sealing combined structure of universal joint Download PDFInfo
- Publication number
- CN112303139A CN112303139A CN202010545716.5A CN202010545716A CN112303139A CN 112303139 A CN112303139 A CN 112303139A CN 202010545716 A CN202010545716 A CN 202010545716A CN 112303139 A CN112303139 A CN 112303139A
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- Prior art keywords
- sealing cover
- tower
- ring
- universal joint
- boss
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- 238000007789 sealing Methods 0.000 title claims abstract description 102
- 229920001971 elastomer Polymers 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229920002725 thermoplastic elastomer Polymers 0.000 claims abstract description 8
- 239000004636 vulcanized rubber Substances 0.000 claims abstract description 7
- 238000001125 extrusion Methods 0.000 claims abstract description 3
- 238000003825 pressing Methods 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 abstract description 19
- 230000001360 synchronised effect Effects 0.000 abstract description 15
- 230000001050 lubricating effect Effects 0.000 abstract description 4
- 239000003570 air Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 229920001084 poly(chloroprene) Polymers 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 229920006346 thermoplastic polyester elastomer Polymers 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 102220062245 rs1800369 Human genes 0.000 description 1
- 102220059961 rs786201335 Human genes 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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
- 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
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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
- F16D2003/22303—Details of ball cages
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Diaphragms And Bellows (AREA)
- Sealing Devices (AREA)
Abstract
A ventilating, water-proof and sealing combined structure of a universal joint is used for a rzeppa synchronous universal transmission shaft. The tower-shaped sealing cover at one end of the ball cage body is made of a thermoplastic elastomer, the small end of the tower-shaped sealing cover is a circular ring with equal diameter and transits to the large end through a tower-shaped structure, the small end is fixed on the telescopic shaft pair, and the large end is fixed on the outer circular surface of the outer ring of the ball cage body; the ventilative watertight fittings closing cap of the other end passes through vulcanized rubber body and ball cage body zonulae occludens, the clamping ring card is in the closing cap ring channel, hole retainer ring card is in the annular boss inside groove outside the closing cap ring, be equipped with the air vent in the closing cap, closing cap annular gap forms exhaust passage with the air vent, the rubber diaphragm opening inwards packs into in the closing cap, the annular boss in the closing cap ring forms the extrusion to the rubber diaphragm with the clamping ring, make the rubber diaphragm produce the deformation tension, can arrange and reduce the hot atmospheric pressure in the universal joint intracavity, can prevent water again and get into the intracavity. The invention can prolong the service life of equipment, protect the internal lubricating environment of the universal joint and meet the working requirements of the equipment in special environment.
Description
Technical Field
The invention relates to the technical field of mechanical transmission, in particular to a combined structure of a breathable waterproof device and a tower-shaped sealing cover for a universal joint.
Background
At present, synchronous universal drive shaft of rzeppa is in the use, because the sealed rotation and the fitting surface friction at the universal joint fitting surface position in inside, can cause the universal joint to generate heat, lead to sealed inside gas temperature to rise, inside atmospheric pressure rises, if generate heat and inside atmospheric pressure rises the back can not make sealed inside gas outgoing, then inside atmospheric pressure can surpass turriform sealed cowling deformation strength, cause the unusual atress of turriform sealed cowling or the inflation back and take place to interfere with other objects in the outside, in the use like this, can cause the damage of turriform sealed cowling to become invalid. Therefore, the transmission shaft needs to exhaust in the use process, and simultaneously, the waterproof effect is achieved, water 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, so that the application range of the ventilating devices is greatly limited, and particularly for a ball cage type synchronous universal transmission shaft used in wheel drive of some vehicles in a wading working environment, hot air pressure generated by friction heating of a 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 universal joint to damage the internal lubricating environment of the universal joint under the underwater running environment of the transmission shaft, so that the universal joint is prevented from working abnormally 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 a breathable waterproof and sealing combined structure of a universal joint, so as to achieve the purposes of discharging and decompressing high-pressure gas in a tower-shaped sealing cover and simultaneously achieving an ideal reverse waterproof effect.
In order to realize the purpose, two ends of the ball cage body are provided with a tower-shaped sealing cover and a breathable waterproof device; the tower-shaped sealing cover is of a wavy structure and is made of a thermoplastic elastomer, the small end of the tower-shaped sealing cover is a circular ring with equal diameter and transits to the large end through the tower-shaped structure, the small end of the tower-shaped sealing cover is fixed on a telescopic shaft pair of the universal joint through a small end fixing interface, and the large end of the tower-shaped sealing cover is fixed on the outer circular surface of the outer ring of the ball cage body; the utility model discloses a universal joint, including a sealing cover, a sealing ring, a rubber diaphragm, a hole baffle ring, a pressure ring, a ventilation hole baffle ring, a ventilation hole exhaust passage, rubber diaphragm's opening is inwards packed into in the sealing cover, the annular boss and the clamping ring of sealing cover form the extrusion to the rubber diaphragm, make the rubber diaphragm produce deformation tension, can arrange and fall the hot atmospheric pressure in the universal joint chamber, can prevent again that water from getting into the intracavity.
The pressing ring is of a circular ring structure, and the bottom of the pressing ring is provided with a boss used 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 0.95mm-1.05mm, and the thickness of the annular part is 2.85 mm-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; the other side of the sealing cover is provided with a circular boss and a central boss, the vulcanized rubber body is arranged on the outer circular surface of the circular boss, the vent hole is positioned at the axis of the central boss, when the difference value of the internal and external air pressure of the tower-shaped sealing cover 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 pressure of the tower-shaped sealing cover is balanced.
The large-opening end and the inner bushing of the tower-shaped sealing cover are both provided with an inner boss and an outer groove, the inner hole of the small-opening end of the tower-shaped sealing cover is provided with a circular arc-shaped bulge, the inner bushing is sleeved in the outer groove of the outer ring of the ball cage body, the large-opening end and the small-opening end of the tower-shaped sealing cover are respectively arranged on the outer groove of the inner bushing and the shaft diameter of the telescopic shaft pair and are clamped tightly by a large clamp and a small clamp, the shaft diameter of the telescopic shaft pair is axially provided with two or more than two sealing installation grooves for installing the small-opening end of the tower-shaped sealing cover, and the circular arc-shaped bulge of the inner hole of; the tower-shaped sealing cover can also be in a variable-diameter wave-shaped structure.
And 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.
In the using process of the invention, high-pressure hot air pressure is generated in the cavity of the mechanical equipment due to the high-speed operation of the mechanical equipment connected with the rzeppa synchronous universal transmission shaft, and the high-pressure hot air pressure can push the rubber diaphragm to deform, so that an air gap is formed on the original attaching surface of the rubber diaphragm and the sealing cover, and high-pressure hot air in the cavity of the protected piece is discharged partially to reduce the air pressure in the cavity; when the rzeppa synchronous universal transmission shaft works in a wading environment, the annular inner boss and the pressing ring of the sealing cover extrude the rubber diaphragm to enable the rubber diaphragm to generate elastic deformation to be attached to the sealing cover tightly, so that the effect of preventing external water from entering the universal joint can be effectively achieved, the breathable and waterproof purposes of the universal joint are realized, and the tower-shaped sealing cover, the rzeppa synchronous universal transmission shaft and a mechanical equipment body piece connected with the rzeppa synchronous universal transmission shaft are well protected.
Compared with the prior art, 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 tower-shaped sealing cover reaches 0.006-0.009 MPa, the high-pressure hot gas in the cavity of the mechanical equipment can be effectively discharged for pressure relief, the internal pressure value of the tower-shaped sealing cover is controlled, the internal pressure and the external pressure of the tower-shaped sealing cover are balanced, the expansion of the tower-shaped sealing cover cannot be caused in the use process, the influence of the high-pressure hot gas on the body part of the mechanical equipment is reduced, the service lives of the tower-shaped sealing cover, the mechanical equipment, the rzeppa type synchronous universal transmission shaft and the like; 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 construction of the waterproof and breathable apparatus of fig. 1.
Fig. 3 is a schematic view of a tower-shaped containment cap of fig. 1.
FIG. 4 is a schematic view of another tower seal housing of FIG. 1.
Detailed Description
As shown in fig. 1, 2, 3 and 4, the cage body 3 of the present invention is provided with a tower-shaped sealing cover 2 and a waterproof and breathable device 4 at both ends thereof. When mechanical equipment connected with the rzeppa synchronous universal transmission shaft runs at a high speed, the combined structure of the tower-shaped sealing cover 2 and the breathable waterproof device 4 can discharge high-pressure hot gas in a cavity of the mechanical equipment for pressure relief, reduce the influence of the high-pressure hot gas on a body part of the mechanical equipment, and prolong the service lives of the tower-shaped sealing cover 2, the mechanical equipment, the rzeppa synchronous universal transmission shaft and the like; when the rzeppa synchronous universal transmission shaft works in a wading environment, the annular inner boss and the pressing ring of the sealing cover extrude the rubber diaphragm, so that the rubber diaphragm can elastically deform to be attached to the sealing cover, the effect of preventing external water from entering the universal joint can be effectively achieved, and the ventilation and waterproof functions of the universal joint are realized.
The tower-shaped sealing cover 2 is of a wavy structure and 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-low temperature performance and the like, the main performance contrast of chloroprene rubber CR and thermoplastic elastomer TPEE is shown in a table 1, and the tower-shaped sealing cover 2 made of the blow molding thermoplastic elastomer with the large end diameter larger than 150mm is adopted, so that the tower-shaped sealing cover is pioneered in the field of transmission; the tower-shaped sealing cover 2 can enable the inner cavity of the ball cage constant velocity universal joint to be larger, the larger cavity can balance the air pressure difference between the inner part and the outer part 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, the influence of air pressure factors on the sliding resistance of the telescopic shaft pair 23 is further reduced, and the structure can adapt to larger corner requirements. The small end of the tower-shaped sealing cover 2 is fixed on a telescopic shaft pair 23 of the universal joint through a small end fixing interface 1, and the large end is fixed on the outer circular surface of the outer ring 20 of the ball cage body 3. The small end is a circular ring with equal diameter and is transited to the large end through a tower-shaped structure, D21= D22= D23 < D24 < D25 < D26 < D27 < D28, the diameter of the large end D2 is more than 150mm, the small end of the tower-shaped sealing cover 2 adopts a structural form with the same diameter, the large telescopic requirement of the rzeppa type synchronous universal transmission shaft can be met, and the use requirement of the large swing angle of the rzeppa type synchronous universal transmission shaft can be met through the tower-shaped structure of the large end; the tower-shaped sealing cover 2 can also be in a variable-diameter wave-shaped structure, D11 is more than D12 is more than D13 is more than D14 is more than D15, and the diameter of the large end D1 is more than 150 mm. The large-opening end and the inner bushing 24 of the tower-shaped sealing cover 2 are both provided with an inner boss and an outer groove, the inner hole at the small-opening end of the tower-shaped sealing cover 2 is provided with a circular arc-shaped bulge, the inner bushing 24 is arranged in the outer groove of the outer ring 20 of the ball cage body 3, the large-opening end and the small-opening end of the tower-shaped sealing cover 2 are respectively arranged on the outer groove of the inner bushing 24 and the shaft diameter of the telescopic shaft pair 23 and are tightly hooped by a large hoop 25 and a small hoop 26, the shaft diameter of the telescopic shaft pair 23 is axially provided with two or more sealing installation grooves for installing the small-opening end of the tower-shaped sealing cover 2, the circular arc-shaped bulge of the inner hole at the small-opening end is matched with the sealing installation groove at the small-opening end, the design of the sealing installation grooves is favorable for reasonably adjusting the axial installation position (pre-compression or pre-tension) of the tower-shaped, the form of the tower-shaped sealing cover 2 in the large swing angle is more reasonable, the adaptability of the same tower-shaped sealing cover 2 under different use working conditions is improved, and the design and development cost for over-developing the tower-shaped sealing cover 2 is saved.
The sealing cover 8 and the vulcanized rubber 9 of the breathable waterproof device 4 are connected with mechanical equipment, in particular to a transition connection body of a rzeppa universal joint on a vehicle rzeppa synchronous universal transmission shaft, and the sealing cover 8 is tightly connected with an inner hole of an outer ring 20 of the rzeppa body 3 through the vulcanized rubber 9. The pressing ring 6 is of a circular structure, and the bottom of the pressing ring is provided with a boss 13 for extruding the annular part 18 of the rubber diaphragm 7; the rubber diaphragm 7 is of a U-shaped flat bottom structure, the flat bottom diaphragm 17 is thin and 1mm in thickness, the annular part 18 is thick and 2.85 mm-2.95mm in thickness, and the structural design can ensure that the rubber diaphragm 7 can form required tension when the rubber diaphragm 7 is deformed by jacking and pressing, and can form required tight fit with the binding surface of the sealing cover 8, so that a good water sealing effect is achieved; one side of the sealing cover 8 is provided with a circular inner boss 12 and a circular outer boss 14, an annular groove for installing the pressure ring 6 is formed between the circular inner boss 12 and the circular outer boss 14, and an annular gap 11 is positioned between the inner ring surface of the circular outer boss 13 and the bottom surface of the annular groove; the other side of the sealing cover 8 is provided with a circular boss 15 and a central boss 16, a vulcanized rubber body 9 is arranged on the outer circular surface of the circular boss 15, a vent hole 10 is positioned at the axis of the central boss 16, when the difference value of the internal and external air pressures of the tower-shaped sealing cover 2 reaches 0.006-0.009 MPa, the rubber diaphragm 7 generates deformation tension, the gas in the universal joint is discharged from an exhaust channel formed by the vent hole 10 and the annular gap 11, so that the internal and external air pressures of the tower-shaped sealing cover 2 are balanced, and the number of the exhaust channels can be determined according to the required exhaust effect; the clamping ring 6 is clamped in the annular groove of the sealing cover 8, the hole retaining ring 5 used for limiting the axial position of the clamping ring 6 is clamped in the inner groove of the annular outer boss 14 of the sealing cover 8, the annular gap 11 of the sealing cover 8 and the vent hole 10 form an exhaust passage, the opening of the rubber diaphragm 7 is inwards filled in the sealing cover 8, the annular inner boss 12 of the sealing cover 8 and the clamping ring 6 extrude the rubber diaphragm 7, the rubber diaphragm 7 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.
A steel ball 21 is arranged between an inner ring 19 and an outer ring 20 of the ball cage body 3, the steel ball 21 is arranged in a window of a retainer 22, and the retainer 22 is embedded between the inner ring 19 and the outer ring 20.
TABLE 1 comparison of the principal Properties of Neoprene CR with thermoplastic elastomer TPEE
Claims (7)
1. The utility model provides a universal joint's ventilative waterproof and sealed integrated configuration which characterized in that: two ends of the ball cage body (3) are provided with a tower-shaped sealing cover (2) and a breathable waterproof device (4); the tower-shaped sealing cover (2) is of a wave-shaped structure and is made of a thermoplastic elastomer, the small end of the tower-shaped sealing cover is an equal-diameter circular ring and transits to the large end through the tower-shaped structure, the small end of the tower-shaped sealing cover is fixed on a telescopic shaft pair (23) of a universal joint through a small end fixing interface (1), and the large end of the tower-shaped sealing cover is fixed on the outer circular surface of an outer ring (20) of the ball cage body (3); the sealing cover (8) of the breathable waterproof device (4) is tightly connected with an inner hole of an outer ring (20) of the ball cage body (3) through vulcanized rubber (9), the pressing ring (6) is clamped in an annular groove of the sealing cover (8), a hole check ring (5) for limiting the axial position of the pressing ring (6) is clamped in an inner groove of an annular outer boss (14) of the sealing cover (8), an air vent (10) is arranged in the sealing cover (8), an annular gap (11) of the sealing cover (8) and the air vent (10) form an exhaust passage, an opening of the rubber diaphragm (7) is inwards filled into the sealing cover (8), an annular inner boss (12) of the sealing cover (8) and the pressing ring (6) form extrusion on the rubber diaphragm (7), the rubber diaphragm (7) 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.
2. The air-permeable, waterproof and sealing combination of a universal joint according to claim 1, wherein: the pressing ring (6) is of a circular ring structure, and the bottom of the pressing ring is provided with a boss (13) used for extruding the annular part (18) of the rubber diaphragm (7).
3. The air-permeable, waterproof and sealing combination of a universal joint according to claim 1, wherein: the rubber diaphragm (7) is of a U-shaped flat bottom structure, the thickness of the flat bottom diaphragm part (17) is 0.95mm-1.05mm, and the thickness of the annular part (18) is 2.85 mm-2.95 mm.
4. The air-permeable, waterproof and sealing combination of a universal joint according to claim 1, wherein: one side of the sealing cover (8) is provided with an annular inner boss (12) and an annular outer boss (14), an annular groove for installing the pressure ring (6) is formed between the annular inner boss (12) and the annular outer boss (14), and an annular gap (11) is formed between the inner ring surface of the annular outer boss (14) and the bottom surface of the annular groove; the other side of the sealing cover (8) is provided with a circular boss (15) and a central boss (16), vulcanized rubber (9) is arranged on the outer circular surface of the circular boss (15), the vent hole (10) is positioned at the axis of the central boss (16), when the difference value between the internal pressure and the external pressure of the tower-shaped sealing cover (2) reaches 0.006-0.009 MPa, the rubber diaphragm (7) generates deformation tension, and the gas in the universal joint is discharged from the vent hole (10) along the annular gap (11), so that the internal pressure and the external pressure of the tower-shaped sealing cover (2) are balanced.
5. The air-permeable, waterproof and sealing combination of a universal joint according to claim 1, wherein: the large-opening end and the inner bushing (24) of the tower-shaped sealing cover (2) are provided with an inner boss and an outer groove, the inner hole of the small-opening end of the tower-shaped sealing cover (2) is provided with a circular arc-shaped bulge, the inner bushing (24) is arranged in the outer groove of the outer ring (20) of the ball cage body (3), the large-opening end and the small-opening end of the tower-shaped sealing cover (2) are respectively arranged on the outer groove of the inner bushing (24) and the shaft diameter of the telescopic shaft pair (23) and are hooped by the large hoop (25) and the small hoop, the shaft diameter of the telescopic shaft pair (23) is provided with more than two sealing installation grooves along the axial direction and used for installing the small-opening end of the tower-shaped sealing cover (2), and the circular arc-shaped bulge of the inner hole of the.
6. The air-permeable, waterproof and sealing combination of a universal joint according to claim 1, wherein: the tower-shaped sealing cover (2) is of a variable-diameter wave-shaped structure.
7. The air-permeable, waterproof and sealing combination of a universal joint according to claim 1, wherein: a steel ball (21) is arranged between an inner ring (19) and an outer ring (20) of the ball cage body (3), the steel ball (21) is arranged in a window of a retainer (22), and the retainer (22) is embedded between the inner ring (19) and the outer ring (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010545716.5A CN112303139A (en) | 2020-06-16 | 2020-06-16 | Breathable, waterproof and sealing combined structure of universal joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010545716.5A CN112303139A (en) | 2020-06-16 | 2020-06-16 | Breathable, waterproof and sealing combined structure of universal joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112303139A true CN112303139A (en) | 2021-02-02 |
Family
ID=74336451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010545716.5A Withdrawn CN112303139A (en) | 2020-06-16 | 2020-06-16 | Breathable, waterproof and sealing combined structure of universal joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112303139A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117249176A (en) * | 2023-11-17 | 2023-12-19 | 万向钱潮股份公司 | Hollow spline transmission shaft |
-
2020
- 2020-06-16 CN CN202010545716.5A patent/CN112303139A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117249176A (en) * | 2023-11-17 | 2023-12-19 | 万向钱潮股份公司 | Hollow spline transmission shaft |
| CN117249176B (en) * | 2023-11-17 | 2024-01-26 | 万向钱潮股份公司 | Hollow spline transmission shaft |
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Application publication date: 20210202 |