CN117570123A - Constant velocity universal joint with two ball pins - Google Patents
Constant velocity universal joint with two ball pins Download PDFInfo
- Publication number
- CN117570123A CN117570123A CN202311732117.4A CN202311732117A CN117570123A CN 117570123 A CN117570123 A CN 117570123A CN 202311732117 A CN202311732117 A CN 202311732117A CN 117570123 A CN117570123 A CN 117570123A
- Authority
- CN
- China
- Prior art keywords
- sliding sleeve
- constant velocity
- raceway
- outer ring
- clearance fit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005096 rolling process Methods 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000001133 acceleration Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 239000000428 dust Substances 0.000 description 8
- 206010066054 Dysmorphism Diseases 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses a two-ball-pin constant velocity universal joint, which comprises a sliding sleeve, a rolling pin, an outer ring and bearing frames symmetrically distributed with two pin shafts; raceway cavities of two pin shafts corresponding to the bearing frames are symmetrically arranged in the sliding sleeve; shoulder shoulders are arranged at the end parts of the two pin shafts of the bearing frame and used for controlling the axial positions of the needle rollers on the pin shafts; the outer spherical surface of the outer ring is in clearance fit with the sliding sleeve raceway, the inner cylindrical surface of the outer ring is in clearance fit with a plurality of annularly distributed needle rollers, and the needle rollers are in clearance fit with the outer cylindrical surface of the pin shaft. The invention has smaller envelope diameter and light weight; the third-order axial derivative force of the universal joint at the inner end of the driving shaft, which is directly related to vehicle shake, is obviously reduced, the shake phenomenon generated by the vehicle during low-speed acceleration is obviously reduced, the structure is more compact and reasonable, and the material cost and the manufacturing cost are reduced.
Description
Technical Field
The invention belongs to the field of automobile parts, and relates to a constant velocity universal joint with two ball pins.
Background
The existing sliding type constant velocity universal joint is a tripod type constant velocity universal joint, when a vehicle accelerates at a low speed or turns, excitation generated by an engine of the vehicle is transmitted to the tripod type constant velocity universal joint at the inner end of a driving shaft, axial derivative force is generated due to the fact that the tripod type constant velocity universal joint reciprocates, friction force between an outer ring and a raceway is increased along with the increase of a universal joint angle due to the fact that a pin roll of a bearing frame of the common tripod type constant velocity universal joint cannot swing relative to the outer ring, the corresponding generated axial derivative force is larger, and the vehicle is easy to shake. The pin shaft of the bearing frame can swing relative to the outer ring, so that the friction force between the outer ring and the roller path is small, and meanwhile, the corresponding axial derivative force is also small, thereby solving the problem of shaking of some vehicles. The axially derived force directly related to vehicle rattle is of the third order, directly related to the number of pins of the tripod constant velocity joint. Therefore, the tripod constant velocity universal joint, whether it is of a normal type or a high-end type, has a tendency that the three-order axial derivative force causes the vehicle to shake during the low-speed acceleration straight line running or the cornering running, but the tripod constant velocity universal joint is different in the magnitude of the shake, and the magnitude of the shake is different, slightly and relatively large due to the difference in the magnitude of the axial derivative force control. That is, for tripod constant velocity joints, the three-step axial derivative force control problem is a very important aspect of design and manufacturing considerations, requiring measures to be taken for the fitting.
Disclosure of Invention
The present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a tripod constant velocity joint having a smaller envelope diameter and a light weight; the third-order axial derivative force of the universal joint at the inner end of the driving shaft, which is directly related to vehicle shake, is obviously reduced, the shake phenomenon generated by the vehicle during low-speed acceleration is obviously reduced, the structure is more compact and reasonable, and the material cost and the manufacturing cost are reduced.
In order to achieve the above object, the technical solution of the present invention is: a constant velocity universal joint with two ball pins comprises a sliding sleeve, rolling pins, an outer ring and bearing frames symmetrically provided with two pin shafts; raceway cavities of two pin shafts corresponding to the bearing frames are symmetrically arranged in the sliding sleeve; shoulder shoulders are arranged at the end parts of the two pin shafts of the bearing frame and used for controlling the axial positions of the needle rollers on the pin shafts; the outer spherical surface of the outer ring is in clearance fit with the sliding sleeve raceway, the inner cylindrical surface of the outer ring is in clearance fit with a plurality of annularly distributed needle rollers, and the needle rollers are in clearance fit with the outer cylindrical surface of the pin shaft.
Further preferably, the cross section of the sliding sleeve is circular, and the two opposite ends of the inner cavity of the sliding sleeve, which are not provided with the raceway cavities, are symmetrically provided with weight reducing grooves. The whole appearance of sliding sleeve is circular, but uses ordinary big end interface to be circular dust cover, and the mould manufacturing degree of difficulty and the degree of difficulty of moulding plastics of dust cover show to reduce, and the part cost reduces. Meanwhile, due to the circular matching of the sliding sleeve and the dust cover, the assembly is simple, and oil leakage failure is not easy to occur after the assembly.
Further preferably, the cross section appearance of the sliding sleeve is special-shaped, two sections of arcs provided with the raceway cavities are arranged on a circle with larger diameter, two sections of arcs not provided with the raceway cavities are arranged on a circle with smaller concentric diameter, and two adjacent arcs are connected through a small arc I, a small arc II and a small arc III. The inner cavity of the sliding sleeve is small in volume, and the weight of the corresponding lubricating grease in the sliding sleeve can be reduced; the sliding sleeve has small weight due to small cross-sectional area of the non-raceway part; because the sliding sleeve is special-shaped, a dust cover with a special-shaped interface is required to be assembled with the sliding sleeve.
The beneficial effects of the invention are as follows: compared with the tripod constant velocity universal joint, the tripod constant velocity universal joint is changed from a tripod constant velocity universal joint into a tripod constant velocity universal joint, the friction between three outer rings and corresponding roller paths of a sliding sleeve is changed into the friction between two outer rings and corresponding roller paths of the sliding sleeve, the friction force is reduced by 1/3, and accordingly the corresponding second-order axial derivative force is also reduced by 1/3. The reduction of the axial derivative force and the change of the order obviously reduce the phenomenon of vehicle shake caused by higher axial force of the existing third order, and the reduction of the axial derivative force plays a role in inhibiting vibration related to other working conditions. The universal joint has smaller envelope diameter, light weight and low cost; the structure is more compact and reasonable, the internal space of the sliding sleeve is enlarged, and the expansion design is easier to be made on the structure.
Drawings
FIG. 1 is a schematic view of an assembled cross-sectional structure of a first embodiment of the present invention;
FIG. 2 is a schematic view of an assembled cross-sectional structure of a second embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a two-fork bearing according to the present invention;
Detailed Description
The invention is further described below in connection with specific embodiments.
As shown in fig. 1 and 3, the embodiment 1 comprises a sliding sleeve 1, a needle roller 4, an outer ring 3 and a bearing frame 2 with two symmetrically distributed pin shafts 5. The sliding sleeve 1 is internally symmetrically provided with raceway cavities of two pin shafts 5 corresponding to the bearing frame 2. The ends of the two pins 5 of the bearing frame 2 are provided with shoulders 7 for controlling the axial position of the needle rollers 4 on the pins 5. The outer spherical surface of the outer ring 3 is in clearance fit with the raceway of the sliding sleeve 1, the inner cylindrical surface of the outer ring 3 is in clearance fit with a plurality of needle rollers 4 distributed in an annular mode, and the needle rollers 4 are in clearance fit with the outer cylindrical surface of the pin shaft 5. The shoulder 7 is used for positioning the axial movement of the needle roller 4 on the pin shaft 5, so that a baffle ring and a spring snap ring for positioning the axial movement of the needle roller on the pin shaft in a common tripod constant velocity universal joint are eliminated, and the manufacturing cost is reduced. The section appearance of the sliding sleeve 1 is special-shaped, two sections of circular arcs 11 with the raceway cavities are arranged on a circle with larger diameter, two sections of circular arcs 12 without the raceway cavities are arranged on a circle with smaller concentric diameter, and two adjacent circular arcs 11 and 12 are connected through a small circular arc I13, a small circular arc II 14 and a small circular arc III 15. The envelope outer diameter of the sliding sleeve is smaller, and the weight of the sliding sleeve 1 is small because the cross-sectional area of the non-raceway part is small; the inner cavity of the sliding sleeve 1 is small in volume, and the weight of the lubricating grease in the corresponding sliding sleeve 1 can be reduced; because sliding sleeve 1 is the dysmorphism to need use the dust cover of dysmorphism interface and with its assembly, and need carry out reasonable interference fit design, ensure that interface cooperation is reliable and stable, the oil leak inefficacy does not appear.
As shown in fig. 2 and 3, in embodiment 2, other structures of this embodiment are the same as those of embodiment 1, except that the cross-section of the sliding sleeve 1 is circular, and weight reducing grooves 6 are symmetrically provided at opposite ends of the inner cavity of the sliding sleeve 1, where no raceway is provided. The sliding sleeve 1 of the embodiment is circular in shape as a whole, and the enveloping outer diameter of the sliding sleeve is larger than that of the embodiment 1, but a common large-end connector is used for forming a circular dust cover, so that the die manufacturing difficulty and the injection molding difficulty of the dust cover are obviously reduced, and the cost of parts is reduced. Meanwhile, due to the circular matching of the sliding sleeve and the dust cover, the assembly is simple, and oil leakage failure is not easy to occur after the assembly.
The foregoing embodiments are merely preferred and exemplary and are not intended to limit the present invention, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (3)
1. A tripod constant velocity joint, characterized in that: comprises a sliding sleeve (1), a needle roller (4), an outer ring (3) and a bearing frame (2) symmetrically provided with two pin shafts (5); raceway cavities of two pin shafts (5) corresponding to the bearing frame (2) are symmetrically arranged in the sliding sleeve (1); shoulder (7) are arranged at the end parts of the two pin shafts (5) of the bearing frame (2); the outer spherical surface of the outer ring (3) is in clearance fit with the raceway of the sliding sleeve (1), the inner cylindrical surface of the outer ring (3) is in clearance fit with a plurality of annularly distributed rolling pins (4), and the rolling pins (4) are in clearance fit with the outer cylindrical surface of the pin shaft (5).
2. The tripod constant velocity joint according to claim 1, wherein: the cross section appearance of sliding sleeve (1) is circular, and the opposite both ends that sliding sleeve (1) inner chamber did not set up the raceway chamber symmetry are provided with and subtract heavy groove (6).
3. A tripod constant velocity joint according to claim 1 or 2, wherein: the section appearance of the sliding sleeve (1) is special-shaped, two sections of circular arcs (11) with the raceway cavities are arranged on a circle with larger diameter, two sections of circular arcs (12) without the raceway cavities are arranged on a circle with smaller concentric diameter, and two adjacent circular arcs (11) and (12) are connected through a small circular arc I (13), a small circular arc II (14) and a small circular arc III (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311732117.4A CN117570123A (en) | 2023-12-16 | 2023-12-16 | Constant velocity universal joint with two ball pins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311732117.4A CN117570123A (en) | 2023-12-16 | 2023-12-16 | Constant velocity universal joint with two ball pins |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117570123A true CN117570123A (en) | 2024-02-20 |
Family
ID=89886301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311732117.4A Pending CN117570123A (en) | 2023-12-16 | 2023-12-16 | Constant velocity universal joint with two ball pins |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117570123A (en) |
-
2023
- 2023-12-16 CN CN202311732117.4A patent/CN117570123A/en active Pending
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |