CN114439834B - Low ovality center pin sleeve capable of realizing bidirectional rigidity changing requirement - Google Patents
Low ovality center pin sleeve capable of realizing bidirectional rigidity changing requirement Download PDFInfo
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- CN114439834B CN114439834B CN202210047438.XA CN202210047438A CN114439834B CN 114439834 B CN114439834 B CN 114439834B CN 202210047438 A CN202210047438 A CN 202210047438A CN 114439834 B CN114439834 B CN 114439834B
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 9
- 241001397809 Hakea leucoptera Species 0.000 claims abstract description 52
- 238000006073 displacement reaction Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims 1
- 238000013016 damping Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 5
- 239000002356 single layer Substances 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
- F16B19/02—Bolts or sleeves for positioning of machine parts, e.g. notched taper pins, fitting pins, sleeves, eccentric positioning rings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
- B61F5/50—Other details
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Springs (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The utility model relates to the field of manufacturing of damping parts of railway vehicles, in particular to a low-ellipticity center pin sleeve capable of achieving the requirement of bidirectional variable stiffness. The center pin bush can realize nonlinear rigidity change in the transverse direction M and the longitudinal direction N, can reduce the ovality of the outer diameter of the center pin bush, enables the shrinkage stress of rubber of the center pin bush in the whole circumferential direction to be similar, and can meet the requirement of deflection torsional rigidity while meeting the radial rigidity.
Description
Technical Field
The utility model relates to a low ovality center pin sleeve capable of realizing bidirectional rigidity changing requirements, and belongs to the field of manufacturing of damping parts of railway vehicles.
Background
The center pin is used as the center of revolution of a traction system of a railway vehicle, is one of key components of a bogie of the railway vehicle and is mainly used for transmitting longitudinal and transverse acting forces. The central part of the center pin is matched with the traction center pin seat through the center pin sleeve, so the center pin sleeve is an important part for connecting the center pin and the bogie, the center pin sleeve is usually formed by vulcanizing a metal inner sleeve, a metal outer sleeve and a middle rubber body, and the relative rotation between the vehicle body and the bogie can be met through the rubber deformation of the center pin sleeve, so that the vibration performance of the vehicle is improved, and the riding comfort is improved. In the prior art, the following patents relate to center pin bushings:
1. the utility model patent number is 201020614439.0, the patent name is 'a central pin sleeve for bogie traction device', two axial through holes are formed in the middle rubber layer, and the cone angle of the inner ring cone is larger than the self-locking angle of the cone. According to the utility model, as the middle rubber layer is provided with the two axial through holes, the rigidity of the center pin sleeve can be changed in the longitudinal direction of the track, and the torsional rigidity of the center pin sleeve is small; the cone angle of the inner ring conical surface is larger than the self-locking angle of the conical surface, so that the separation of the center pin and the center pin sleeve is facilitated, but the variable rigidity of the track in the longitudinal direction can only be realized, the variable rigidity of the track in the transverse direction can not be realized, and the product has high outer diameter ovality and uneven stress.
2. The utility model patent number is 201020659735.2, and the patent name is 'a central pin sleeve for a railway vehicle bogie', wherein the length of a central pin sleeve mandrel is longer than that of an outer sleeve, the length of one side, which is contacted with the mandrel, of single-layer rubber is the same as that of the mandrel, the length of one side, which is contacted with the outer sleeve, of the single-layer rubber is the same as that of the outer sleeve, the wide parts and the narrow parts of the two ends of the single-layer rubber are in arc smooth transition, and the mandrel is arranged into a conical hollow annular shaft body. The utility model has simple structure, has different radial rigidities when bearing radial loads in different directions, and can realize rigidity variation longitudinally so as to reduce the influence of the longitudinal impact of the bogie on the center pin when the vehicle starts and brakes; the axial low torsional rigidity meets the requirement that when the vehicle is in a small curve, the internal connecting piece of the central traction device is not loosened relatively, but the patent can only realize the rigidity change in the longitudinal direction of the track, can not realize the rigidity change in the transverse direction of the track, has low bearing capacity and is unfavorable for the installation of products.
In summary, how to design a center pin sleeve which can meet the radial rigidity and the deflection rigidity requirement, can realize nonlinear rigidity variation in both the transverse direction and the longitudinal direction, and can make the shrinkage stress of rubber in the whole circumferential direction similar and the stress uniform is a problem to be solved currently.
Disclosure of Invention
The utility model aims to provide a low-ellipticity center pin bush capable of realizing the requirement of bidirectional rigidity change, wherein a rubber body of the low-ellipticity center pin bush is provided with a hollow rigidity-changing unit in the transverse direction M and the longitudinal direction N, a hard stop is arranged in the hollow rigidity-changing unit, the nonlinear rigidity-changing and deflection torsion requirements of the center pin bush in the transverse direction M and the longitudinal direction N are realized through the two-way hollow rigidity-changing unit, and the radial rigidity of the center pin bush is ensured through the hard stop.
In order to achieve the above purpose, the present utility model proposes the following technical scheme: the utility model provides a can realize low ovality center pin bush of two-way rigidity requirement that becomes, includes overcoat, dabber and the rubber body of vulcanization between overcoat and dabber, and the rubber body all is equipped with the empty rigid unit that changes on horizontal M and longitudinal N, is equipped with the hard backstop of connecting on the dabber outer wall and being equipped with the displacement clearance with the overcoat inner wall in the empty rigid unit that changes, and the hard backstop will empty rigid unit evenly divide into two deformation through-holes that run through.
Preferably, the hollow rigidity-changing unit comprises a rigidity-changing unit group I and a rigidity-changing unit group II which are uniformly arranged along the central axis point O of the center pin sleeve and respectively positioned on the transverse direction M and the longitudinal direction N, wherein the central line of the hard stop in the rigidity-changing unit group I coincides with the transverse central line L1 of the center pin sleeve, and the central line of the hard stop in the rigidity-changing unit group II coincides with the longitudinal central line L2 of the center pin sleeve.
Preferably, the connecting line between the farthest distance from the central line L3 of the deformation through hole and the central pin sleeve central axis O on the side wall of the deformation through hole on the rubber body is S1, the connecting line between the farthest distance from the central line L3 of the deformation through hole and the central pin sleeve central axis O on the side wall of the deformation through hole on the hard stop is S2, the included angle between S1 and S2 is a, and the included angle a is designed by taking the maximum torsion angle c of the central pin sleeve in the running process as a reference.
Preferably, the relationship between the included angle a and the maximum torsion angle c of the center pin bush in the running process is as follows: a is more than c, and a-c is more than or equal to 0.5 degrees and less than or equal to 5 degrees.
Preferably, an included angle b between a connecting line S1 between the farthest distance from the central line L3 of the deformation through hole and the central axis O of the center pin bush on the side wall of the deformation through hole on the rubber body and the central line of the hard stop in the air-oriented variable stiffness unit to which the connecting line S1 belongs is set according to the rigidity requirement of the center pin bush.
Preferably, the included angle b is as follows: b is more than or equal to 10 degrees and less than or equal to 30 degrees.
Preferably, the width H of the displacement gap is set according to the maximum deformation displacement value of the center pin sleeve, so that the inflection point between the nonlinear rigidity changing and the linear rigidity changing of the rubber body is controlled.
Preferably, the side wall of the deformation through hole on the rubber body is an arc wall protruding towards one side of a central line L3 far away from the deformation through hole, the rubber molded surface is prevented from being folded through the arc wall, and the fatigue performance of the rubber body is improved.
Preferably, the side wall of the deformation through hole on the rubber body comprises a first cambered surface wall and a second cambered surface wall which are protruded towards one side of a central line L3 far away from the deformation through hole, and the first cambered surface wall and the second cambered surface wall are connected through a third cambered surface wall which is protruded towards one side of the central line L3 close to the deformation through hole; the first cambered surface wall, the second cambered surface wall and the third cambered surface wall prevent the rubber molded surface from being folded and improve the rigidity of the rubber body.
Preferably, the shrinkage stresses of the rubber body in the transverse direction M and in the longitudinal direction N are matched.
The beneficial effects of the utility model are as follows:
1. according to the utility model, the hollow rigidity-changing units are arranged in the transverse direction M and the longitudinal direction N, so that the nonlinear rigidity-changing of the central pin bush can be realized in the transverse direction M and the longitudinal direction N, and the deflection torsional rigidity of the central pin bush is reduced; according to the utility model, the radial rigidity of the center pin bush can be ensured by arranging the hard stop in the space-direction variable rigidity unit. Compared with the prior art, the center pin bush has high bearing capacity, and simultaneously, the ovality of the center pin bush can be reduced.
2. The hard stop uniformly divides the hollow variable stiffness unit into two penetrating deformation through holes, an included angle a between a connecting line S1 of the deformation through holes on the side wall of the rubber body, which is farthest from a central line L3 of the deformation through holes, and a connecting line S2 of the deformation through holes on the side wall of the hard stop, which is farthest from the central line L3 of the deformation through holes, and the central axis O of the central pin bush is larger than a maximum torsion angle c of the central pin bush in the running process, so that the deflection torsion capability of the central pin bush can be ensured;
setting a and c to: the deflection capacity of the center pin bush is ensured, and meanwhile, the volume of the rubber body is increased to the greatest extent, so that the radial rigidity of the center pin bush is ensured, and the service life is ensured.
3. The space-direction stiffening unit comprises a first stiffening unit group and a second stiffening unit group which are uniformly arranged along the central axis point O of the center pin bush and are respectively positioned on the transverse direction M and the longitudinal direction N, and an included angle b between the S1 and the central line of the hard stop in the space-direction stiffening unit to which the S1 belongs is set according to the rigidity requirement of the center pin bush, so that the shrinkage stress of the rubber body of the center pin bush in the whole circumferential direction is similar, the uniformity of stress of the rubber body is improved, the ellipticity of the center pin bush in the space direction and the real direction is reduced, the installation difficulty of a product is reduced, and the working performance of the product is improved.
4. The width H of the displacement gap is set according to the maximum deformation displacement value of the center pin sleeve, so that the inflection point between the nonlinear deformation rigidity and the linear deformation rigidity of the rubber body can be controlled, and when the limit deformation displacement of the center pin sleeve is reached, the hard stop is contacted with the inner wall of the outer sleeve, and the stop protection function of the hard stop is started.
5. The positioning pin holes and the U-shaped grooves are formed in the mandrel, so that rapid assembly of products can be realized, the correctness of the installation direction of the products is ensured, and errors in the radial direction and the axial direction during product installation are avoided; the inner wall of the mandrel comprises a conical surface section, a straight surface section I and a straight surface section II, and the difficulty in installing and detaching products can be reduced through a three-section structure.
6. Through setting up the rubber profile that deformation through-hole is located the lateral wall on the rubber body, can prevent that the rubber profile from discounting when guaranteeing deformation through-hole volume, improve the rigidity of the rubber body.
Drawings
Fig. 1 is a schematic view showing the overall structure of a core pin bush according to the first embodiment.
Fig. 2 is a top view of the center pin housing in the first embodiment.
Fig. 3 is a cross-sectional view of fig. 2 in the direction A-A.
Fig. 4 is a schematic partial structure of a center pin bush in the second embodiment.
The reference numerals include: 1. a jacket; 2. a mandrel; 3. a rubber body; 5. A hard stop; 6. a deformation through hole; 7. a displacement gap; 8. an arc-shaped wall; 9. arc wall I; 10. arc wall two; 11. arc wall III; 12. positioning pin holes; 13. a U-shaped groove; 14. a conical surface section; 15. straight section one; 16. a straight section II; 17. and (5) encapsulation.
Detailed Description
Example 1
This embodiment is described in further detail below in conjunction with fig. 1-3.
The utility model provides a can realize low ovality center pin cover of two-way rigidity requirement, as shown in fig. 1 and 2, including overcoat 1, dabber 2 and the rubber body 3 of vulcanizing between overcoat 1 and dabber 2, be equipped with the two-way air-to-rigidity changing unit that is located on horizontal M and vertical N on the rubber body 3, can reduce the off-torsion rigidity of rubber body 3 in horizontal M and vertical N through the two-way air-to-rigidity changing unit, realize the non-linear rigidity changing requirement of rubber body in horizontal M and vertical N, simultaneously, in order to improve the radial rigidity of center pin cover, be equipped with hard stop 5 in the air-to-rigidity changing unit, hard stop 5 is connected on the outer wall of dabber 2, hard stop 5 evenly divide into two deformation through-holes 6 that run through with the air-to-rigidity changing unit, provide deformation volume space for center pin cover in the deformation process through deformation through-hole 6, prevent that rubber body 3 from extrusion from folding fracture, improve the fatigue performance and the fatigue life of rubber body 3.
The two-way air-direction rigidity changing units are specifically a first rigidity changing unit group and a second rigidity changing unit group which are uniformly arranged along the center axis point O of the center pin sleeve and are respectively positioned on the transverse direction M and the longitudinal direction N, wherein the first rigidity changing unit group comprises two air-direction rigidity changing units uniformly arranged on two sides of the transverse center line L1 of the center pin sleeve, the second rigidity changing unit group comprises two air-direction rigidity changing units uniformly arranged on two sides of the longitudinal center line L2 of the center pin sleeve, the center line of the hard stop 5 in the first rigidity changing unit group is overlapped with the transverse center line L1 of the center pin sleeve, and the center line of the hard stop 5 in the second rigidity changing unit group is overlapped with the longitudinal center line L2 of the center pin sleeve; the shrinkage stress of the rubber body 3 of the center pin bush in the whole circumferential direction is similar, the uniformity of the stress of the rubber body 3 is improved, and the ovality of the center pin bush in the air direction and the real direction is reduced. The shrinkage stress of the rubber body 3 in the transverse direction M and the longitudinal direction N is matched, so that the ovality of the center pin sleeve is further reduced, and the stress uniformity of the center pin sleeve is improved.
As shown in fig. 2, a connecting line between the farthest distance from the central line L3 of the deformation through hole 6 and the central pin sleeve central axis O on the side wall of the deformation through hole 6 on the rubber body 3 is S1, a connecting line between the farthest distance from the central line L3 of the deformation through hole 6 and the central pin sleeve central axis O on the side wall of the deformation through hole 6 on the hard stop 5 is S2, an included angle between S1 and S2 is a, the included angle a is designed based on the maximum torsion angle c of the central pin sleeve in the running process, when the maximum torsion angle c of the central pin sleeve is larger, the included angle a is correspondingly set larger, so that the volume of the deformation through hole 6 is increased, the deformation volume space of the deformation through hole 6 is increased, and the deflection torsion rigidity of the rubber body 3 is reduced; when the maximum torsion angle c of the center pin bush is smaller, the included angle a is correspondingly set smaller, so that the radial rigidity of the center pin bush is increased to the greatest extent.
In order to improve the deflection torsion performance of the rubber body 3 while ensuring the radial rigidity of the center pin bush, the relation between the included angle a and the maximum torsion angle c of the center pin bush in the running process is set as follows: a is larger than c, a-c is larger than or equal to 0.5 degrees and smaller than or equal to 6 degrees, in this embodiment, a-c is specifically smaller than 3 degrees, and a corresponding a-c value can be set by a person skilled in the art according to the requirements of actual working conditions.
The included angle b between the connecting line S1 between the farthest distance from the central line L3 of the deformation through hole 6 and the central axis O of the center pin bush on the side wall of the deformation through hole 6 on the rubber body 3 and the central line of the hard stop 5 in the space-wise stiffening unit which the connecting line S1 belongs to is set according to the rigidity requirement of the center pin bush; when the rigidity requirement of the required center pin bush is high, the included angle b is set smaller, so that the volume of the rubber body 3 is increased, and the rigidity of the center pin bush is enhanced; when the rigidity requirement of the required center pin bush is low, the included angle b is set larger, so that the volume of the deformation through hole 6 is increased, the deformation volume space of the deformation through hole 6 is increased, and the deflection torsion capability of the center pin bush is improved.
The included angle b is as follows: b is more than or equal to 10 degrees and less than or equal to 40 degrees, preferably b=20 degrees or 25 degrees or 30 degrees, the included angle b is specifically set to be 25 degrees in the embodiment, and a person skilled in the art can set a corresponding value of b according to the requirement of actual working conditions.
A displacement gap 7 is arranged between the hard stop 5 and the inner wall of the outer sleeve 1, and the width H of the displacement gap 7 is set according to the maximum deformation displacement value of the center pin sleeve, so that the inflection point between the nonlinear rigidity changing and the linear rigidity changing of the rubber body 3 is controlled. When the deformation of the center pin bush reaches the limit deformation displacement in the loading process, the hard stop 5 is in contact with the inner wall of the outer sleeve 1, the stop protection function of the hard stop 5 is started, and the service life and the service performance of the center pin bush and other related components are improved. The outer side of the hard stop 5 is provided with an encapsulation 17 to carry out corrosion protection and water prevention protection on the hard stop 5, and meanwhile, abnormal sound caused by hard contact when the hard stop 5 is contacted with the outer sleeve 1 is avoided.
As shown in fig. 2, the side wall of the deformation through hole 6 on the rubber body 3 is an arc wall 8 protruding towards one side of a central line L3 far away from the deformation through hole 6, and the rubber profile is prevented from being folded, deformed, accumulated and broken in the deformation process of the rubber body 3 by the arc wall 8, so that the fatigue performance of the rubber body 3 is improved; meanwhile, the arc-shaped wall 8 protrudes towards one side of the central line L3 far away from the deformation through hole 6, so that the volume space of the deformation through hole 6 can be increased, and the deflection and torsion capacity of the center pin bush can be improved.
The upper end face of the mandrel 2 is provided with a positioning pin hole 12 and a U-shaped groove 13, and the quick assembly of the product can be realized through the positioning pin hole 12 and the U-shaped groove 13, so that the accuracy of the installation direction of the product is ensured; as shown in fig. 3, the inner wall of the mandrel 2 comprises a conical surface section 14, a straight surface section 15 and a straight surface section two 16, and the difficulty in installing and detaching the product can be reduced through a three-section structure.
Example two
The difference between this embodiment and the first embodiment is that, as shown in fig. 4, the sidewall of the deformation through hole 6 on the rubber body 3 is a three-section type surface structure, specifically including a first arc wall 9 and a second arc wall 10 protruding toward one side of the centerline L3 far from the deformation through hole 6, a third arc wall 11 is connected between the first arc wall 9 and the second arc wall 10, and the third arc wall 11 protrudes toward one side of the centerline L3 near the deformation through hole 6; the volume space of the deformation through hole 6 can be increased through the arc surface wall I9 and the arc surface wall II 10, the deflection torsion capability of the center pin bush is improved, and the radial rigidity of the rubber body 3 can be increased through the arc surface wall III 11. The rubber molded surface of the three-section combined structure can also avoid rubber accumulation and folding in the deformation process, and the fatigue life of the rubber body 3 is prolonged.
The above examples are intended to be illustrative of the utility model and not limiting, and those skilled in the art, after reading the present specification, may make modifications to the embodiments of the utility model as necessary without inventive contribution, but are protected by the patent laws within the scope of the appended claims.
Claims (5)
1. The low-ellipticity center pin bush capable of realizing the requirement of bidirectional rigidity change comprises an outer sleeve (1), a mandrel (2) and a rubber body (3) vulcanized between the outer sleeve (1) and the mandrel (2), and is characterized in that the rubber body (3) is provided with a space-direction rigidity changing unit in the transverse direction M and the longitudinal direction N, a hard stop (5) connected to the outer wall of the mandrel (2) and provided with a displacement gap (7) with the inner wall of the outer sleeve (1) is arranged in the space-direction rigidity changing unit, and the space-direction rigidity changing unit is uniformly divided into two through deformation through holes (6) by the hard stop (5); the hollow rigidity changing unit comprises a rigidity changing unit group I and a rigidity changing unit group II which are uniformly arranged along the central axis point O of the center pin sleeve and respectively positioned on the transverse direction M and the longitudinal direction N, the central line of a hard stop (5) in the rigidity changing unit group I is overlapped with the transverse central line L1 of the center pin sleeve, and the central line of the hard stop (5) in the rigidity changing unit group II is overlapped with the longitudinal central line L2 of the center pin sleeve; the connecting line between the center line L3 of the deformation through hole (6) and the center pin bush center axis O, which is located on the side wall of the rubber body (3), is S1, the connecting line between the center line L3 of the deformation through hole (6) and the center pin bush center axis O, which is located on the side wall of the hard stop (5), is S2, the included angle between S1 and S2 is a, and the included angle a is designed by taking the maximum torsion angle c of the center pin bush in the running process as a reference; the relation between the included angle a and the maximum torsion angle c of the center pin bush in the running process is as follows: a is more than c, and a-c is more than or equal to 0.5 degrees and less than or equal to 5 degrees; the deformation through hole (6) is positioned on the side wall of the rubber body (3), and an included angle b between a connecting line S1 between the farthest distance from the central line L3 of the deformation through hole (6) and the central axis point O of the central pin bush and the central line of the hard stop (5) in the hollow-direction variable stiffness unit to which the connecting line S1 belongs is set according to the rigidity requirement of the central pin bush; the included angle b is as follows: b is more than or equal to 10 degrees and less than or equal to 30 degrees.
2. The low ovality center pin bush capable of realizing the bidirectional rigidity changing requirement according to claim 1, wherein the width H of the displacement gap (7) is set according to the maximum deformation displacement value of the center pin bush, so as to control the inflection point between the nonlinear rigidity changing and the linear rigidity changing of the rubber body (3).
3. The low-ellipticity central pin bush capable of realizing the bidirectional rigidity changing requirement according to claim 2, wherein the side wall of the deformation through hole (6) on the rubber body (3) is an arc-shaped wall (8) protruding towards one side away from a central line L3 of the deformation through hole (6), and the bending of the rubber profile is prevented through the arc-shaped wall (8), so that the fatigue performance of the rubber body (3) is improved.
4. A low ovality center pin bush capable of realizing the bidirectional rigidity changing requirement according to claim 3, wherein the side wall of the deformation through hole (6) on the rubber body (3) comprises a first cambered surface wall (9) and a second cambered surface wall (10) which are protruded towards one side far away from a central line L3 of the deformation through hole (6), and the first cambered surface wall (9) and the second cambered surface wall (10) are connected through a third cambered surface wall (11) which is protruded towards one side close to the central line L3 of the deformation through hole (6); the first cambered surface wall (9), the second cambered surface wall (10) and the third cambered surface wall (11) prevent the rubber molded surface from being folded and improve the rigidity of the rubber body (3).
5. The low ovality core pin bushing capable of achieving the bi-directional stiffness requirement according to claim 3 or 4, characterized in that the rubber body (3) is shrink stress matched in the transverse direction M and the longitudinal direction N.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210047438.XA CN114439834B (en) | 2022-01-17 | 2022-01-17 | Low ovality center pin sleeve capable of realizing bidirectional rigidity changing requirement |
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| CN202210047438.XA CN114439834B (en) | 2022-01-17 | 2022-01-17 | Low ovality center pin sleeve capable of realizing bidirectional rigidity changing requirement |
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| CN114439834B true CN114439834B (en) | 2023-10-03 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115571183A (en) * | 2022-10-13 | 2023-01-06 | 株洲时代瑞唯减振装备有限公司 | Z-shaped central traction vibration damper |
| CN117227774B (en) * | 2023-10-24 | 2024-09-03 | 株洲时代新材料科技股份有限公司 | Method for designing different transverse and longitudinal rigidities of center pin bush and center pin bush |
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| JP3729404B2 (en) * | 2002-06-27 | 2005-12-21 | 東海ゴム工業株式会社 | Anti-vibration bush |
| JP2004161249A (en) * | 2002-09-27 | 2004-06-10 | Tokai Rubber Ind Ltd | Connector assembly and connecting device for steering wheel |
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| CN201932179U (en) * | 2010-12-15 | 2011-08-17 | 青岛四方车辆研究所有限公司 | Central pin bush used for bogie of railway vehicle |
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| CN208669911U (en) * | 2018-07-20 | 2019-03-29 | 重庆理工大学 | A kind of automotive suspension bushing |
| CN109501565A (en) * | 2018-11-27 | 2019-03-22 | 上汽通用汽车有限公司 | Suspending apparatus for driving motor and the electric vehicle including it |
| WO2022000724A1 (en) * | 2020-07-03 | 2022-01-06 | 博戈橡胶塑料（株洲）有限公司 | Bushing for electrical vehicle powertrain suspension, and suspension system |
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| CN114439834A (en) | 2022-05-06 |
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