CN117128253A - Cross axle dust cover and dustproof cross axle structure - Google Patents
Cross axle dust cover and dustproof cross axle structure Download PDFInfo
- Publication number
- CN117128253A CN117128253A CN202311404856.0A CN202311404856A CN117128253A CN 117128253 A CN117128253 A CN 117128253A CN 202311404856 A CN202311404856 A CN 202311404856A CN 117128253 A CN117128253 A CN 117128253A
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- China
- Prior art keywords
- cross shaft
- taper
- cross
- ring part
- ring
- Prior art date
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Links
- 239000000428 dust Substances 0.000 title claims abstract description 67
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 102100030346 Antigen peptide transporter 1 Human genes 0.000 claims description 10
- 102100030343 Antigen peptide transporter 2 Human genes 0.000 claims description 10
- 108010023335 Member 2 Subfamily B ATP Binding Cassette Transporter Proteins 0.000 claims description 10
- 101800000849 Tachykinin-associated peptide 2 Proteins 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 239000003921 oil Substances 0.000 abstract description 41
- 239000010687 lubricating oil Substances 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 9
- 239000011499 joint compound Substances 0.000 description 14
- 230000003014 reinforcing effect Effects 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 241000239290 Araneae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 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
- 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
- F16D3/841—Open covers, e.g. guards for agricultural p.t.o. shafts
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C5/00—Crossheads; Constructions of connecting-rod heads or piston-rod connections rigid with crossheads
-
- 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
- F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Sealing Of Bearings (AREA)
Abstract
The application relates to a cross shaft dust cover and a dust-proof cross shaft structure, comprising: the first ring part is used for being in sealing connection with an oil seal of the cross shaft; the second ring part is used for being connected with the cross shaft in a sealing way; the first ring part and the second ring part can form a cavity together with the cross shaft and the oil seal, and a plurality of through holes are circumferentially formed in the joint of the first ring part and the second ring part and are used for communicating the cavity with an external space; and through a plurality of through holes that first circle portion and second circle portion junction circumference set up with cavity and outside intercommunication, ensure under the unchangeable prerequisite of dust cover and cross axle cooperation performance for when universal joint bearing and cross axle rotate relatively, lubricating oil can form one deck even oil film in the universal joint, and the produced gas of lubricating oil can be discharged to the air from the through hole by the cavity, thereby reduce the pressure between universal joint bearing and the cross axle, improve the radiating effect, thereby extension universal joint's life.
Description
Technical Field
The application relates to the technical field of universal joints, in particular to a cross shaft dust cover and a dust-proof cross shaft structure.
Background
The universal joint is a part for realizing variable-angle power transmission and is used for changing the position of the direction of a transmission axis; taking a cross shaft universal joint as an example, the cross shaft universal joint mainly comprises a cross shaft, a dust cover, an oil seal, a needle roller, an outer ring and a gasket.
Specifically, the outer edge of the dust cover is pressed and arranged in the groove of the outer ring through interference fit of the oil seal and the cross shaft; when the universal joint bearing and the cross shaft rotate relatively, gas generated by lubricating oil cannot be smoothly discharged, and a uniform oil film cannot be formed on the universal joint bearing and the cross shaft, so that the pressure between the universal joint bearing and the cross shaft is increased, and the heat dissipation effect is poor; thereby affecting the service life of the joint.
Disclosure of Invention
The application aims to overcome the defect of short service life of a universal joint in the prior art, thereby providing a cross shaft dust cover and a dust-proof cross shaft structure.
In order to achieve the above purpose, the application adopts the following technical scheme:
a spider dust cover, comprising:
the first ring part is used for being in sealing connection with an oil seal of the cross shaft;
the second ring part is used for being connected with the cross shaft in a sealing way; the first ring part and the second ring part can form a cavity with the cross shaft and the oil seal, a plurality of through holes are circumferentially formed in the joint of the first ring part and the second ring part, and the through holes are used for communicating the cavity with an external space.
Preferably, the cross shaft root has a first taper, the second ring has a second taper corresponding to the first taper, and the second taper is capable of relatively fitting with the first taper.
Preferably, the taper of the first taper is TAP1, the taper of the second taper is TAP2,
and TAP1≡TAP2.
Preferably, the taper TAP1 of the first taper portion measures a distance L1, the taper TAP2 of the first taper portion measures a distance L2,
and L1 > L2.
Preferably, the second ring part is further provided with a first step, the first step is located at the radial inner side of the second ring part, and when the second ring part is in interference fit with the cross shaft, the first step and the cross shaft are arranged at intervals, and a formed space is a part of the cavity.
Preferably, the dust cover further comprises a filler, and the filler is arranged in the through hole;
the filler comprises a honeycomb material.
Preferably, the first ring part is further provided with a second step, and the second step is located at the radial outer side of the first ring part and forms an annular groove with the first ring part.
Preferably, the utility model also comprises a mud baffle,
the mud baffle is fixedly arranged in the annular groove, and a space for air circulation is reserved between the mud baffle and the through hole.
Preferably, the length of the mud guard in the axial direction is larger than the aperture of the through hole, so that the projection of the mud guard in the axial direction covers the through hole.
A dust cross structure comprising any one of the above dust caps, comprising: the novel needle roller comprises a cross shaft, an oil seal and a needle roller bearing, wherein the needle roller bearing is arranged on the cross shaft, the oil seal is in interference fit with the cross shaft, the oil seal is arranged on the inner side of an outer ring of the needle roller bearing, a first ring portion is connected with a framework of the oil seal, a second ring portion is in interference fit with the cross shaft, the first ring portion and the second ring portion can form a cavity with the cross shaft and the oil seal, and a gap for gas circulation is reserved between the outer ring of the needle roller bearing and the second ring portion.
Compared with the prior art, the application has the beneficial effects that:
according to the cross shaft dust cover and the dustproof cross shaft structure, provided by the technical scheme, the matching relation of the first ring part and the second ring part of the dust cover is utilized, so that the first ring part, the second ring part, the cross shaft and the oil seal form a cavity, the cavity is communicated with the outside through the through holes formed in the circumferential direction of the joint of the first ring part and the second ring part, the condition that the matching performance of the dust cover and the cross shaft is unchanged is ensured, when the universal joint bearing and the cross shaft relatively rotate, a layer of uniform oil film can be formed in the universal joint by lubricating oil, and gas generated by the lubricating oil can be discharged from the through holes to the air through the cavity, so that the pressure intensity between the universal joint bearing and the cross shaft is reduced, the heat dissipation effect is improved, and the service life of the universal joint is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure of a dust cap according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of the dust cap shown in FIG. 1;
FIG. 3 is an enlarged schematic view of the structure at A shown in FIG. 2;
FIG. 4 is a schematic view of the overall structure of a cross;
FIG. 5 is an enlarged schematic view of the structure at B shown in FIG. 4;
fig. 6 is an enlarged schematic view of the structure at C shown in fig. 5.
Reference numerals illustrate:
a cross shaft 1; 11 a first taper; 2, oil sealing; 31 outer ring; 32 gaskets; 33 roller pins; 4, a dust cover; 41 a first loop; 42 a second loop; 421 first step; 4211 a second taper; 4212 a first mesa; 4213 a second mesa; 422. a first cavity; 423 a second cavity; 424 a second step; 425 annular grooves; 426 gap; 43 through holes; 44 mud baffle members; 45 reinforcing ribs; 46 a filler.
Detailed Description
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the application are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In the prior art, in order to realize dust protection of the universal joint, a groove is usually additionally formed on the outer ring 31 of the needle bearing, so that the outer edge of the dust cover 4 is pressed into the groove formed on the outer ring 31, on one hand, the design and manufacturing cost of the outer ring 31 of the needle bearing is increased, and on the other hand, when the universal joint bearing rotates relative to the universal joint 1, the gas generated by the lubricating oil cannot be smoothly discharged.
Based on this, the embodiment of the application provides a cross shaft dust cover and a dust-proof cross shaft structure, as shown in fig. 1, the dust cover 4 is used for preventing external dust or slurry, water vapor and other impurities from entering the cross shaft 1, so as to protect the normal operation and service life of the cross shaft 1; specifically, the dust cover 4 includes: a first ring portion 41 and a second ring portion 42, wherein the first ring portion 41 is used for being in sealing connection with the oil seal 2 of the cross 1, and the second ring portion 42 is used for being in sealing connection with the cross 1; the first ring part 41 and the second ring part 42 can form a cavity together with the cross shaft 1 and the oil seal 2, and the cavity is used for collecting and storing air generated when the lubricating oil is matched with the universal joint bearing to rotate relative to the cross shaft 1; in addition, in order to facilitate timely discharge of air collected and stored in the cavity, a plurality of through holes 43 are circumferentially arranged at the joint of the first ring part 41 and the second ring part 42, and the through holes 43 are used for communicating the cavity with an external space; in order to ensure smooth discharge of air in the cavity, a plurality of through holes 43 are uniformly formed at the connection part of the first ring part 41 and the second ring part 42; it can be appreciated that, for convenient manufacturing, generally, the first ring portion 41 and the second ring portion 42 are integrally formed, so that not only the dustproof effect of the dust cover 4 is ensured, but also the problem that air generated when the lubricating oil is matched with the universal joint bearing to rotate relative to the cross shaft 1 cannot be smoothly discharged is avoided.
By utilizing the matching relation between the first ring part 41 and the second ring part 42 of the dust cover 4, the first ring part 41, the second ring part 42, the cross shaft 1 and the oil seal 2 form a cavity, and the cavity is communicated with the outside through a plurality of through holes 43 formed in the circumferential direction of the joint of the first ring part 41 and the second ring part 42, so that when the matching performance of the dust cover 4 and the cross shaft 1 is unchanged, the universal joint bearing and the cross shaft 1 can relatively rotate, a layer of uniform oil film can be formed in the universal joint by lubricating oil, and gas generated by the lubricating oil can be discharged into the air from the through holes 43 through the cavity, so that the pressure intensity between the universal joint bearing and the cross shaft 1 is reduced, the heat dissipation effect is improved, and the service life of the universal joint is prolonged.
As shown in fig. 6, in order to further enhance the connection tightness between the second ring portion 42 and the cross-shaft 1, a first cone portion 11 is further provided at the shaft root portion of the cross-shaft 1, and the second ring portion 42 has a second cone portion 4211 disposed corresponding to the first cone portion 11, so that during the assembling process of the dust cover 4, the second cone portion 4211 located on the second ring portion 42 can be relatively attached to the first cone portion 11, so that the first cone portion 11 and the second cone portion 4211 are mutually pressed tightly; specifically, if the taper of the first cone 11 is TAP1 and the taper of the second cone 4211 is TAP2, TAP1 is approximately equal to TAP2, the taper of the two is consistent, so that the first cone 11 and the second cone 4211 can be better adapted, the taper of the first cone 11 and the taper of the second cone 4211 are oppositely arranged, the first cone 11 and the second cone 4211 with equal taper are used for complementation, the two can be in compression joint more tightly, and then a better dustproof effect is achieved; further, when the taper of the first cone 11 is TAP1, the corresponding TAP1 measurement distance is L1, the taper of the second cone 4211 is TAP2, the corresponding TAP2 measurement distance is L2, and L1 > L2, so that the dust cover is convenient to be mounted in cooperation with the cross shaft 1.
It should be noted that, the range of the taper and the measuring distance of the taper need to be specifically selected according to the specification of the cross 1, so as to ensure that the contact length between the second ring portion 42 and the cross 1 in the axial direction can be reduced under the condition that the matching performance of the dust cover 4 and the cross 1 is unchanged, so as to form a part of empty space, and increase the volume of the cavity, so that air generated by relatively rotating the lubricating oil matched with the universal joint bearing and the cross 1 can have enough space for storage, and the running parts are prevented from being affected by gas or damaged by impact.
Specifically, the second ring portion 42 is further provided with a first step 421, and the first step 421 is located radially inward of the second ring portion 42; the range of the taper and the measuring distance of the taper is selected based on the specification requirement of the cross 1, and the contact length of the second ring part 42 and the cross 1 in the axial direction can be reduced under the condition that the matching performance of the dust cover 4 and the cross 1 is unchanged; in one embodiment, as shown in fig. 5, when the second ring portion 42 is in interference fit with the cross, the first step 421 is spaced apart from the cross, and the space formed is a part of the cavity; specifically, the first step 421 includes a first table 4212 and a second table 4213, the first table 4212 is disposed towards the oil seal 2 and is not in contact with the oil seal 2, the second table 4213 is disposed towards the cross 1 and is not in contact with the cross 1, so that the second ring 42 cooperates with the cross 1 and the oil seal 2 to form a first cavity 422, and a space formed between the second table 4213 of the first step 421 and the cross 1 is a part of the cavity.
In another embodiment; as shown in fig. 2, the second ring portion 42 is directly engaged with the cross 1 without the first step 421, and the second cavity 423 is formed by the space formed by the second ring portion 42 engaging with the cross 1 and the oil seal 2. That is, the formation of the first cavity 422 and the second cavity 423 is not premised on the fitting performance of the dust cover 4 and the cross 1.
For convenience in manufacturing and use, the dust cover 4 is generally made of rubber material, and an oblique angle is further arranged on the second ring part 42 of the dust cover 4 based on the characteristic that rubber is easy to deform; as shown in fig. 5, when the dust cover 4 is extruded during the assembly process, the material of the interference portion of the dust cover 4 is extruded into the gap formed by the root fillet of the cross 1 and the bevel angle of the dust cover 4, so that the dust cover 4 is tightly attached to the cross 1.
As shown in fig. 3, in order to further improve the dust-proof effect of the dust cover 4, the dust cover 4 further includes a filler 46, and the filler 46 is used for filling the through hole 43 to filter the material flowing through the through hole 43, so as to prevent dust, mud, moisture, etc. from entering the cavity from the through hole 43, thereby affecting the normal operation of the cross 1; further, the filler 46 comprises a honeycomb material.
Specifically, when the cross 1 and the needle bearing rotate relatively, the air generated by the lubricating oil is discharged through the honeycomb material in the through hole 43, so that the pressure between the universal joint bearing and the cross 1 is reduced, the heat dissipation effect is improved, the lubricating oil can also form a uniform oil film in the universal joint, dust or slurry or water vapor in the outside air cannot enter the cavity, and a good working environment is provided for the operation of the cross 1 and the needle bearing.
As shown in fig. 3, a second step 424 is further disposed on the first ring portion 41, and the second step 424 is located radially outside the first ring portion 41, and the second step 424 and the first ring portion 41 form an annular groove 425, so that the through hole 43 is located in the annular groove 425, thereby shielding the through hole 43 and avoiding being blocked by dust and silt.
In order to further protect the through hole 43 and avoid dust and mud from entering the cavity from the through hole 43, the dust cover 4 further comprises a mud baffle 44; the mud guard 44 is fixedly arranged in the annular groove 425, and a space for air circulation is reserved between the mud guard 44 and the through hole 43; specifically, when the shutter 44 is in the annular shape, and the annular-shaped shutter 44 is provided along the annular groove 425, in order to avoid clogging of the through-hole 43, the length of the annular-shaped shutter 44 in the axial direction is larger than the aperture of the through-hole 43, so that the projection of the shutter 44 in the circumferential direction covers the through-hole 43; the gas in the cavity is then discharged from the through-holes 43 via the honeycomb material from the space between the annular shaped mud guard 44 and the through-holes 43.
In addition, in some embodiments, in order to achieve an optimized design that saves materials, the mud baffle 44 is further configured as a plurality of blocks, and the area of a single block is larger than the area of the through hole 43, and the number of blocks is also configured in a one-to-one correspondence with the number of tube perforations; specifically, the stopper is provided in the annular groove 425 at a position corresponding to the through hole 43, and a space for gas to flow is reserved between the stopper and the through hole 43.
As shown in fig. 2, in order to ensure the structural strength of the dust cover 4, the dust cover 4 is further provided with a plurality of reinforcing ribs 45, and the plurality of reinforcing ribs 45 are uniformly distributed in the first cavity 422 or the second cavity 423; preferably, in order to avoid that the structural strength of the dust cover 4 is affected by the through holes 43, the through holes 43 are opened at positions between two adjacent reinforcing ribs 45; or, as in the present application, eight through holes 43 are selectively formed, and the eight through holes 43 are uniformly arranged, and each through hole 43 is located between two adjacent reinforcing ribs 45, and two reinforcing ribs 45 are spaced between each two adjacent through holes 43; on the one hand, smooth exhaust of the cavity is realized, and on the other hand, the structural strength of the dust cover 4 is ensured.
The dustproof cross shaft structure, which adopts the dustproof cover 4 to prevent dust, as shown in fig. 4, comprises: a cross shaft 1, an oil seal 2 and a needle bearing; wherein, the cross shaft 1 is also called as a cross, and is a machine part for realizing variable-angle power transmission; the oil seal 2 is also called an oil protection ring, and the oil seal 2 is used for preventing sediment, dust or mud, water vapor and the like from invading into the bearing from outside and sealing grease at the same time so as to limit the leakage of lubricating oil in the bearing; the needle roller bearing is mainly suitable for supporting structural members with limited radial installation size; specifically, the needle bearing comprises an outer ring 31, a plurality of needle rollers 33 and a gasket 32, the needle rollers 33 and the oil seal 2 are sleeved on the cross shaft 1 together, the oil seal 2 and the cross shaft 1 are in interference fit, the oil seal 2 is arranged on the inner side of a ring opening of the outer ring 31 so as to prevent lubricating oil in the needle bearing from leaking outwards, the gasket 32 is arranged at the bottom of the outer ring 31, and the needle rollers 33 are arranged between the oil seal 2 and the gasket 32.
Specifically, the first ring portion 41 is connected with the framework of the oil seal 2, in order to enhance the connection tightness between the first ring portion 41 and the oil seal 2, a convex portion slightly larger than the opening of the framework of the oil seal 2 is further arranged at the lip position of the first ring portion 41, so that the first ring portion 41 is tightly embedded in the framework of the oil seal 2, the second ring portion 42 is in interference fit with the cross shaft 1, so that the first ring portion 41, the second ring portion 42, the cross shaft 1 and the oil seal 2 form a cavity, a gap 426 for gas circulation is reserved between the outer ring 31 and the second ring portion 42 of the needle bearing, and the gap 426 is communicated with the cavity through a plurality of through holes 43, so that air in the cavity can be discharged to the gap 426 through the through holes 43 and flows into the air; in addition, in order to facilitate the assembly of the dust cap 4 with the outer ring 31 of the needle bearing, the mouth portion of the outer ring 31 of the needle bearing is inserted into the annular groove 425, and a gap 426 for ventilation is located between the mouth of the outer ring 31 and the annular groove 425.
The first ring part 41 of the dust cover 4 is connected with the framework of the oil seal 2 by utilizing the matching relation between the first ring part 41 and the second ring part 42 of the dust cover 4, the second ring part 42 of the dust cover 4 is in interference fit with the cross shaft 1, so that the first ring part 41, the second ring part 42, the cross shaft 1 and the oil seal 2 form a cavity, a gap 426 for gas circulation is reserved between the outer ring 31 of the needle bearing and the second ring part 42, and the cavity is communicated with the through holes 43 through a plurality of through holes 43 circumferentially arranged between the first ring part 41 and the second ring part 42, so that the structural design of the outer ring 31 of the needle bearing is simplified on the premise that the matching performance of the dust cover 4 and the cross shaft 1 is unchanged, and the manufacturing cost of the outer ring 31 of the needle bearing is reduced; and when the universal joint bearing and the cross shaft 1 relatively rotate, the lubricating oil can form a layer of uniform oil film in the universal joint, and gas generated by the lubricating oil can be discharged from the through holes 43 to the gap 426 from the cavity and flows into the air, so that the pressure intensity between the universal joint bearing and the cross shaft 1 is reduced, the heat dissipation effect is improved, and the service life of the universal joint is prolonged.
The above embodiments are only preferred embodiments of the present application, and the scope of the present application is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present application are intended to be within the scope of the present application as claimed.
Claims (10)
1. A cross axle dust cap, comprising:
the first ring part is used for being in sealing connection with an oil seal of the cross shaft;
the second ring part is used for being connected with the cross shaft in a sealing way; the first ring part and the second ring part can form a cavity with the cross shaft and the oil seal, a plurality of through holes are circumferentially formed in the joint of the first ring part and the second ring part, and the through holes are used for communicating the cavity with an external space.
2. The dust cap of claim 1, wherein the cross-shaft root has a first taper, the second collar has a second taper corresponding to the first taper, and the second taper is relatively conformable to the first taper.
3. The dust cap of claim 2, wherein the taper of the first taper is TAP1 and the taper of the second taper is TAP2,
and TAP1≡TAP2.
4. The dust cover of claim 3, wherein the first taper TAP1 is measured a distance L1, the first taper TAP2 is measured a distance L2,
and L1 > L2.
5. The dust cover of claim 1, wherein the second collar portion is further provided with a first step, the first step is located radially inward of the second collar portion, and when the second collar portion is in interference fit with the cross shaft, the first step is spaced from the cross shaft, and a space formed by the first step and the cross shaft is a part of the cavity.
6. The dust cover of claim 1, further comprising a filler disposed within the through-hole;
the filler comprises a honeycomb material.
7. The dust cover of claim 1, wherein the first collar portion is further provided with a second step, the second step being located radially outward of the first collar portion and forming an annular groove with the first collar portion.
8. The dust boot of claim 7, further comprising a shield,
the mud baffle is fixedly arranged in the annular groove, and a space for air circulation is reserved between the mud baffle and the through hole.
9. The dust cap of claim 8, wherein the length of the shield in the axial direction is greater than the aperture of the through-hole such that the projection of the shield in the axial direction covers the through-hole.
10. A dust cross structure comprising the dust cap of any one of claims 1-9, comprising: the novel needle roller comprises a cross shaft, an oil seal and a needle roller bearing, wherein the needle roller bearing is arranged on the cross shaft, the oil seal is in interference fit with the cross shaft, the oil seal is arranged on the inner side of an outer ring of the needle roller bearing, a first ring portion is connected with a framework of the oil seal, a second ring portion is in interference fit with the cross shaft, the first ring portion and the second ring portion can form a cavity with the cross shaft and the oil seal, and a gap for gas circulation is reserved between the outer ring of the needle roller bearing and the second ring portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311404856.0A CN117128253B (en) | 2023-10-27 | 2023-10-27 | Cross axle dust cover and dustproof cross axle structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311404856.0A CN117128253B (en) | 2023-10-27 | 2023-10-27 | Cross axle dust cover and dustproof cross axle structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117128253A true CN117128253A (en) | 2023-11-28 |
| CN117128253B CN117128253B (en) | 2024-01-16 |
Family
ID=88856824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311404856.0A Active CN117128253B (en) | 2023-10-27 | 2023-10-27 | Cross axle dust cover and dustproof cross axle structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117128253B (en) |
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| JP2002333038A (en) * | 2001-05-08 | 2002-11-22 | Gmb Kk | Universal joint |
| CN2648167Y (en) * | 2003-10-21 | 2004-10-13 | 万向钱潮股份有限公司 | Cross axle universal joint with dustproof cover |
| US20160091026A1 (en) * | 2014-09-30 | 2016-03-31 | Aktiebolaget Skf | Universal joint |
| CN108980212A (en) * | 2018-09-26 | 2018-12-11 | 天津包博特密封科技有限公司 | A kind of dust-proof grease proofing sealing ring for traction machine bearing |
| CN210461451U (en) * | 2019-07-17 | 2020-05-05 | 南京三佳万向节制造有限公司 | Sealing structure of universal joint |
| CN115126792A (en) * | 2022-08-31 | 2022-09-30 | 万向钱潮股份公司 | Universal joint sealing device |
| CN115234582A (en) * | 2022-09-23 | 2022-10-25 | 万向钱潮股份公司 | Dust cover and universal joint |
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2023
- 2023-10-27 CN CN202311404856.0A patent/CN117128253B/en active Active
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| CN210461451U (en) * | 2019-07-17 | 2020-05-05 | 南京三佳万向节制造有限公司 | Sealing structure of universal joint |
| CN115126792A (en) * | 2022-08-31 | 2022-09-30 | 万向钱潮股份公司 | Universal joint sealing device |
| CN115234582A (en) * | 2022-09-23 | 2022-10-25 | 万向钱潮股份公司 | Dust cover and universal joint |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117128253B (en) | 2024-01-16 |
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