CN114439834A - Low-ellipticity center pin bush capable of realizing bidirectional variable rigidity requirement - Google Patents
Low-ellipticity center pin bush capable of realizing bidirectional variable rigidity requirement Download PDFInfo
- Publication number
- CN114439834A CN114439834A CN202210047438.XA CN202210047438A CN114439834A CN 114439834 A CN114439834 A CN 114439834A CN 202210047438 A CN202210047438 A CN 202210047438A CN 114439834 A CN114439834 A CN 114439834A
- Authority
- CN
- China
- Prior art keywords
- center pin
- deformation
- wall
- center
- pin sleeve
- 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.)
- Granted
Links
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 14
- 241001397809 Hakea leucoptera Species 0.000 title abstract description 31
- 238000006073 displacement reaction Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 238000013016 damping Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 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
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000013040 rubber vulcanization Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Springs (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention relates to the field of manufacturing of damping parts of railway vehicles, in particular to a low-ellipticity central pin bush capable of realizing the requirement of bidirectional variable stiffness, which comprises an outer sleeve, a mandrel and a rubber body vulcanized between the outer sleeve and the mandrel, wherein the rubber body is provided with a hollow stiffening unit in the transverse direction M and the longitudinal direction N, a hard stop connected to the outer wall of the inner sleeve and provided with a displacement gap with the inner wall of the outer sleeve is arranged in the hollow stiffening unit, and the hard stop uniformly divides the hollow stiffening unit into two penetrating deformation through holes. The center pin bush can realize nonlinear rigidity changing in the transverse M direction and the longitudinal N direction, and can reduce the ovality of the outer diameter of the center pin bush, so that the shrinkage stress of rubber of the center pin bush in the whole circumferential direction is similar, and the requirements of partial torsional rigidity can be met while the radial rigidity is met.
Description
Technical Field
The invention relates to a low-ellipticity center pin bush capable of meeting the requirement of bidirectional variable rigidity, and belongs to the field of manufacturing of damping parts of railway vehicles.
Background
The center pin is used as the center of the rotation of the railway vehicle traction system, is one of key parts of a railway vehicle bogie and is mainly used for transmitting longitudinal and transverse acting force. The central part of the center pin is matched with the traction center pin base through a center pin sleeve, so that the center pin sleeve is an important part for connecting the center pin and the bogie, the center pin sleeve is usually formed by rubber vulcanization of a metal inner sleeve, a metal outer sleeve and a middle rubber body, and the relative rotation between the bogie and the vehicle body 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 discloses a utility model patent of "201020614439.0", the patent name is "a center pin cover for bogie draw gear", the middle rubber layer is opened has two axial through-holes, and inner circle conical surface cone angle is greater than conical surface auto-lock angle. The utility model has the advantages that because the middle rubber layer is provided with two axial through holes, the center pin is sleeved on the longitudinal direction of the track to realize variable rigidity, and the self torsional rigidity is small; the cone angle of the conical surface of the inner ring 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 cannot be realized, and the product has high outer diameter ovality and uneven stress.
2. The patent number is "201020659735.2", and the patent name is "a central pin bushing for rail vehicle bogie"'s utility model patent, and the length of this central pin bushing dabber is greater than the length of overcoat, and one side of individual layer rubber and dabber contact is the same with the length of dabber, and is the same with one side length of overcoat contact with the overcoat, is arc smooth transition between the both ends wide part of individual layer rubber and the narrow part, and the dabber sets up to inside and is the hollow cyclic annular axis body of toper. The utility model has simple structure, has different radial rigidity when bearing radial loads in different directions, and can longitudinally realize variable rigidity so as to reduce the influence of longitudinal impact of the bogie on the center pin when the vehicle is started and braked; the axial low torsional rigidity has satisfied when the vehicle undersize curve, and central traction device internal connection spare does not take place to become flexible relatively, but this patent also can only realize the variable rigidity of track longitudinal direction, can not realize the variable rigidity of track transverse direction, and bearing capacity is low, and is unfavorable for the installation of product.
In summary, how to design a center pin bush which can satisfy the radial stiffness and the partial torsional stiffness, can realize the nonlinear stiffening in both the transverse direction and the longitudinal direction, and enables the shrinkage stress of the rubber in the whole circumferential direction to be similar and the stress to be uniform is a problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a low-ellipticity center pin bush capable of realizing the requirement of bidirectional variable rigidity.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a can realize two-way low ovality center pin bush that becomes rigidity requirement, includes overcoat, dabber and vulcanizes the rubber body between overcoat and dabber, the rubber body all is equipped with the sky to become rigid unit on horizontal M and vertical N, empty to become rigid unit in be equipped with connect on the dabber outer wall and with the overcoat inner wall between be equipped with the hard backstop in the displacement clearance, hard backstop will empty to become rigid unit evenly divide into two deformation through-holes that run through.
Preferably, the air stiffening unit comprises a stiffening unit group I and a stiffening unit group II which are uniformly arranged along the central axis point O of the central pin sleeve and are respectively positioned in the transverse direction M and the longitudinal direction N, the center line of the hard stop in the stiffening unit group I is coincident with the transverse center line L1 of the central pin sleeve, and the center line of the hard stop in the stiffening unit group II is coincident with the longitudinal center line L2 of the central pin sleeve.
Preferably, a connecting line between the farthest position of the deformation through hole on the side wall of the rubber body from the center line L3 of the deformation through hole and the central axis point O of the central pin sleeve is S1, a connecting line between the farthest position of the deformation through hole on the side wall of the hard stop from the center line L3 of the deformation through hole and the central axis point O of the central pin sleeve is S2, an 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 advancing process as a reference.
Preferably, the relationship between the included angle a and the maximum torsion angle c of the center pin sleeve during the travel is: 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 position, farthest from the center line L3 of the deformation through hole, of the deformation through hole on the side wall of the rubber body and the central shaft point O of the central pin sleeve and a center line of a hard stop in the hollow stiffening unit to which the deformation through hole belongs is set according to the rigidity requirement of the central pin sleeve.
Preferably, the included angle b has the following size: 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 bush, so as to control the inflection point between the nonlinear stiffening and the linear stiffening of the rubber body.
Preferably, the lateral wall that the deformation through-hole is located on the rubber body is towards the convex arc wall in the centre line L3 one side of keeping away from the deformation through-hole, prevents through the arc wall that the rubber profile from breaking over, improves the fatigue performance of the rubber body.
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, wherein the first cambered surface wall and the second cambered surface wall protrude towards one side of a center 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 protruding towards one side of a center line L3 close to the deformation through hole; the rubber profile is prevented from being folded and the rigidity of the rubber body is improved through the arc surface wall I, the arc surface wall II and the arc surface wall III.
Preferably, the shrinkage stresses of the rubber body in the transverse direction M and in the longitudinal direction N are adapted.
The invention has the beneficial effects that:
1. according to the invention, the air-direction stiffening units are arranged on the transverse M and the longitudinal N, so that the central pin bush can realize nonlinear stiffness variation on the transverse M and the longitudinal N, and the deflection torsional stiffness of the central pin bush is reduced; the invention can ensure the radial rigidity of the central pin bush by arranging the hard stop in the air direction stiffening unit. Compared with the prior art, the center pin sleeve has high bearing capacity, and the ovality of the center pin sleeve can be reduced.
2. The hard stop uniformly divides the air-direction stiffening unit into two penetrating deformation through holes, and an included angle a between a connecting line S1 between the farthest position of the deformation through hole on the side wall of the rubber body away from the center line L3 of the deformation through hole and a central shaft point O in the central pin sleeve and a connecting line S2 between the farthest position of the deformation through hole on the side wall of the hard stop away from the center line L3 of the deformation through hole and the central shaft point O in the central pin sleeve is larger than the maximum torsion angle c of the central pin sleeve in the advancing process, so that the deflection torsion capability of the central pin sleeve can be ensured;
setting a and c as: a-c is more than or equal to 0.5 degrees and less than or equal to 5 degrees, so that the deflection capability of the center pin sleeve is ensured, and the volume of the rubber body is increased to the maximum extent, so that the radial rigidity of the center pin sleeve is ensured, and the service life is ensured.
3. The air-to-rigid unit comprises a rigid unit group I and a rigid unit group II which are uniformly arranged along a central axis point O of the central pin sleeve and are respectively positioned on the transverse M direction and the longitudinal N direction, and an included angle b between the S1 and a central line of a hard stop in the air-to-rigid unit to which the S1 belongs is arranged according to the rigidity requirement of the central pin sleeve, so that the shrinkage stress of a rubber body of the central pin sleeve in the whole circumferential direction is similar, the stress uniformity of the rubber body is improved, the ellipticity of the central pin sleeve in the air direction and the actual 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 central pin bush, so that the inflection point between nonlinear stiffening and linear stiffening of the rubber body can be controlled, the hard stop is ensured to be in contact with the inner wall of the outer sleeve when the maximum deformation displacement of the central pin bush is reached, and the stop protection function of the hard stop is started.
5. The core shaft is provided with a positioning pin hole and a U-shaped groove, so that the product can be quickly assembled, the correctness of the installation direction of the product is ensured, and errors in the radial direction and the axial direction of the product during 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 mounting and dismounting difficulty of the product can be reduced through a three-section structure.
6. Through setting up the rubber profile of the lateral wall that is located the rubber body to the deformation through-hole, can prevent that the rubber profile from breaking over, improving the rigidity of the rubber body when guaranteeing the deformation and passing through the hole volume.
Drawings
Fig. 1 is a schematic view of the overall structure of a center pin sleeve according to an embodiment.
FIG. 2 is a top view of a center pin sleeve according to one embodiment.
Fig. 3 is a sectional view in the direction a-a of fig. 2.
Fig. 4 is a partial structural schematic view of a center pin sleeve in the second embodiment.
The reference numerals include: 1. a jacket; 2. a mandrel; 3. a rubber body; 5. A hard stop; 6. deforming the through hole; 7. a displacement gap; 8. an arcuate wall; 9. a cambered surface wall I; 10. a second cambered surface wall; 11. a cambered surface wall III; 12. a positioning pin hole; 13. a U-shaped groove; 14. a conical surface section; 15. a straight section I; 16. a straight section II; 17. and (4) encapsulating.
Detailed Description
Example one
This embodiment is described in further detail below with reference to fig. 1-3.
A low-ellipticity central pin bush capable of realizing the requirement of bidirectional variable rigidity is disclosed, as shown in figure 1 and figure 2, comprising an outer sleeve 1, a mandrel 2 and a rubber body 3 vulcanized between the outer sleeve 1 and the mandrel 2, wherein the rubber body 3 is provided with two-way air-direction rigidity-changing units positioned on the transverse direction M and the longitudinal direction N, the bias torsional rigidity of the rubber body 3 in the transverse direction M and the longitudinal direction N can be reduced through the bidirectional air-direction stiffening unit, the nonlinear stiffening requirements of the rubber body in the transverse direction M and the longitudinal direction N are realized, meanwhile, in order to improve the radial rigidity of the central pin bush, a hard stop 5 is arranged in the air-direction stiffening unit, the hard stop 5 is connected on the outer wall of the mandrel 2, the hard stop 5 uniformly divides the air-direction stiffening unit into two penetrating deformation through holes 6, through the deformation through-hole 6 for the center pin cover provides deformation volume space at the deformation in-process, prevent that 3 extrusion of rubber body from breaking a book, improve the fatigue performance and the fatigue life of rubber body 3.
Two-direction air-to-rigidity units, as shown in fig. 2, specifically, a rigidity-to-unit group i and a rigidity-to-unit group ii which are uniformly arranged along a central axis point O of the central pin sleeve and are respectively positioned on the transverse direction M and the longitudinal direction N, wherein the rigidity-to-unit group i comprises two air-to-rigidity units uniformly arranged on two sides of a transverse central line L1 of the central pin sleeve, the rigidity-to-unit group ii comprises two air-to-rigidity units uniformly arranged on two sides of a longitudinal central line L2 of the central pin sleeve, a central line of a hard stop 5 in the rigidity-to-unit group i coincides with a transverse central line L1 of the central pin sleeve, and a central line of a hard stop 5 in the rigidity-to-unit group ii coincides with a longitudinal central line L2 of the central pin sleeve; the shrinkage stress of the rubber body 3 of the central pin bush in the whole circumferential direction is similar, the stress uniformity of the rubber body 3 is improved, and the ovality of the central pin bush in the hollow direction and the real direction is reduced. Shrinkage stress of the rubber body 3 in the transverse direction M and the longitudinal direction N is matched, so that ovality of the central pin sleeve is further reduced, and stress uniformity of the central pin sleeve is improved.
As shown in fig. 2, a connecting line between a position of the deformation through hole 6 located on the sidewall of the rubber body 3 farthest from the center line L3 of the deformation through hole 6 and the central axis point O of the central pin bushing is S1, a connecting line between a position of the deformation through hole 6 located on the sidewall of the hard stop 5 farthest from the center line L3 of the deformation through hole 6 and the central axis point O of the central pin bushing 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 bushing in the process of traveling, when the maximum torsion angle c of the central pin bushing is larger, the included angle a is correspondingly set larger, so as to increase the volume of the deformation through hole 6, increase the deformation volume space of the deformation through hole 6, and reduce the deflection torsion rigidity of the rubber body 3; when the maximum torsion angle c of the center pin sleeve is smaller, the included angle a is correspondingly set smaller so as to increase the radial rigidity of the center pin sleeve to the maximum extent.
In order to improve the partial torsion performance of the rubber body 3 while ensuring the radial rigidity of the center pin bush, the relationship between the included angle a and the maximum torsion angle c of the center pin bush in the advancing process is set as follows: a is greater than c, and 0.5 ° ≦ a-c ≦ 6 °, specifically, a-c =3 ° in this embodiment, and those skilled in the art may set the corresponding a-c value according to the requirement of the actual working condition.
An included angle b between a connecting line S1 between the position, farthest away from the center line L3 of the deformation through hole 6, of the deformation through hole 6 on the side wall of the rubber body 3 and a central shaft point O of the central pin bush and a central line of a hard stop 5 in the hollow direction rigidity changing unit to which the deformation through hole belongs is set according to the rigidity requirement of the central pin bush; when the rigidity requirement of the required center pin sleeve is high, the included angle b is set to be smaller so as to increase the volume of the rubber body 3 and enhance the rigidity of the center pin sleeve; when the rigidity requirement of the required center pin bush is low, the included angle b is set to be larger so as to increase the volume of the deformation through hole 6, increase the deformation volume space of the deformation through hole 6 and improve the partial torsion capability of the center pin bush.
The size of the included angle b is as follows: 10 DEG-b-40 DEG, preferably b =20 DEG or 25 or 30 DEG, in the embodiment, the included angle b is specifically set to 25 DEG, and a person skilled in the art can set the corresponding b value according to the requirement of the actual working condition.
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 central pin bush, so that the inflection point between the nonlinear stiffening and the linear stiffening of the rubber body 3 is controlled. When the deformation of the central 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 central pin bush and other related components are prolonged. The outer side of the hard stopping block 5 is provided with an encapsulation 17 so as to carry out corrosion-resistant and waterproof protection on the hard stopping block 5 and avoid abnormal sound caused by hard contact when the hard stopping block 5 is in contact with the outer sleeve 1.
As shown in fig. 2, the side wall of the deformation through hole 6 on the rubber body 3 is an arc-shaped wall 8 protruding towards one side of a center line L3 far away from the deformation through hole 6, and the arc-shaped wall 8 can prevent the rubber body 3 from being broken by folding, deforming, stacking and breaking during deformation, so as to improve the fatigue performance of the rubber body 3; meanwhile, the arc-shaped wall 8 protrudes towards one side of the center 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 partial torsion capability of the center pin bush is 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 product can be quickly assembled through the positioning pin hole 12 and the U-shaped groove 13, so that the correctness of the installation direction of the product is ensured; as shown in fig. 3, the inner wall of the mandrel 2 includes a conical section 14, a straight section one 15 and a straight section two 16, and the difficulty in mounting and dismounting the product can be reduced by the three-section structure.
Example two
The difference between the first embodiment and the second embodiment is that, as shown in fig. 4, the side wall of the deformation through hole 6 on the rubber body 3 is of a three-section type surface structure, and specifically includes a first arc wall 9 and a second arc wall 10 protruding towards one side of a center line L3 far away 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 towards one side of a center line L3 near the deformation through hole 6; the volume space of the deformation through hole 6 can be increased through the first arc-surface wall 9 and the second arc-surface wall 10, the partial torsion capability of the central pin bush is improved, and the radial rigidity of the rubber body 3 can be increased through the third arc-surface wall 11. The rubber profile of the three-section combined structure can also avoid the accumulation and folding of rubber in the deformation process, and prolong the fatigue life of the rubber body 3.
The above examples are only illustrative and not restrictive, and those skilled in the art can make modifications to the embodiments of the present invention as required without any inventive contribution thereto after reading the present specification, but all such modifications are intended to be protected by the following claims.
Claims (10)
1. The utility model provides a can realize low ovality center pin bushing of two-way variable rigidity requirement, includes overcoat (1), dabber (2) and vulcanizes rubber body (3) between overcoat (1) and dabber (2), its characterized in that, rubber body (3) all are equipped with empty to become rigid unit on horizontal M and vertical N, empty to become rigid unit in be equipped with connect on dabber (2) outer wall and with overcoat (1) inner wall between be equipped with hard backstop (5) in be equipped with displacement clearance (7), hard backstop (5) will empty to become rigid unit evenly divide into two deformation through-holes (6) that run through.
2. The low ovality center pin sleeve capable of achieving the requirement of bidirectional variable stiffness as claimed in claim 1, wherein the air stiffening unit comprises a stiffening unit group I and a stiffening unit group II which are respectively positioned on the transverse direction M and the longitudinal direction N and are uniformly arranged along the center axis point O of the center pin sleeve, the center line of the hard stop (5) in the stiffening unit group I is coincident with the transverse center line L1 of the center pin sleeve, and the center line of the hard stop (5) in the stiffening unit group II is coincident with the longitudinal center line L2 of the center pin sleeve.
3. The low ovality center pin bushing capable of achieving the bi-directional variable stiffness requirement as claimed in claim 2, wherein a connecting line between a position on the side wall of the rubber body (3) farthest from the center line L3 of the deformation through hole (6) and the center pin bushing center axis point O is S1, a connecting line between a position on the side wall of the deformation through hole (6) farthest from the center line L3 of the deformation through hole (6) and the center pin bushing center axis point O is S2, an included angle between S1 and S2 is a, and the included angle a is designed based on the maximum torsion angle c of the center pin bushing during the traveling.
4. The low ovality center pin sleeve capable of achieving the requirement of bidirectional variable stiffness as claimed in claim 3, wherein the relationship between the included angle a and the maximum torsion angle c of the center pin sleeve in the process of traveling 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.
5. The low ovality center pin sleeve capable of achieving the requirement of bidirectional variable rigidity according to claim 4, characterized in that the angle b between the connecting line S1 between the farthest position from the center line L3 of the deformation through hole (6) and the central axis point O of the center pin sleeve on the side wall of the rubber body (3) and the center line of the hard stop (5) in the hollow direction stiffening unit to which the deformation through hole (6) belongs is set according to the requirement of rigidity of the center pin sleeve.
6. The low ovality center pin sleeve capable of achieving the requirement of bidirectional variable stiffness according to claim 5, wherein the included angle b is: b is more than or equal to 10 degrees and less than or equal to 30 degrees.
7. The low ovality center pin sleeve with the requirement of achieving the bidirectional variable stiffness as claimed in claim 6, characterized in that the width H of the displacement gap (7) is set according to the maximum deformation displacement value of the center pin sleeve, thereby controlling the inflection point between the nonlinear stiffening and the linear stiffening of the rubber body (3).
8. The low-ovality center pin sleeve capable of achieving the requirement of bidirectional variable stiffness according to claim 7, is characterized in that the side wall of the deformation through hole (6) on the rubber body (3) is an arc-shaped wall (8) protruding towards one side of a center line L3 far away from the deformation through hole (6), and the rubber profile is prevented from being broken through the arc-shaped wall (8), so that the fatigue performance of the rubber body (3) is improved.
9. The low-ovality center pin sleeve capable of achieving the requirement of bidirectional variable rigidity according to claim 7, is characterized in that the side wall of the deformation through hole (6) on the rubber body (3) comprises a first cambered wall (9) and a second cambered wall (10) which are convex towards the side far away from the center line L3 of the deformation through hole (6), and the first cambered wall (9) and the second cambered wall (10) are connected through a third cambered wall (11) which is convex towards the side near to the center line L3 of the deformation through hole (6); the rubber profile is prevented from being broken and the rigidity of the rubber body (3) is improved through the cambered surface wall I (9), the cambered surface wall II (10) and the cambered surface wall III (11).
10. Low ovality central pin sleeve with a requirement for a variable stiffness in both directions according to claim 8 or 9, characterized in that the shrinkage stresses of the rubber body (3) in the transverse direction M and in the longitudinal direction N are matched.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114439834A true CN114439834A (en) | 2022-05-06 |
| CN114439834B CN114439834B (en) | 2023-10-03 |
Family
ID=81367693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210047438.XA Active CN114439834B (en) | 2022-01-17 | 2022-01-17 | Low ovality center pin sleeve capable of realizing bidirectional rigidity changing requirement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114439834B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040017034A1 (en) * | 2002-06-27 | 2004-01-29 | Tokai Rubber Industries, Ltd. | Vibration isolating bushing |
| US20040060789A1 (en) * | 2002-09-27 | 2004-04-01 | Tokai Rubber Industries, Ltd. | Connector assembly and connecting device for steering wheel |
| 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 |
| JP2017155802A (en) * | 2016-03-01 | 2017-09-07 | 倉敷化工株式会社 | Vibration-proof device |
| 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 |
| CN208669911U (en) * | 2018-07-20 | 2019-03-29 | 重庆理工大学 | A kind of automotive suspension bushing |
| 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 |
-
2022
- 2022-01-17 CN CN202210047438.XA patent/CN114439834B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040017034A1 (en) * | 2002-06-27 | 2004-01-29 | Tokai Rubber Industries, Ltd. | Vibration isolating bushing |
| US20040060789A1 (en) * | 2002-09-27 | 2004-04-01 | Tokai Rubber Industries, Ltd. | Connector assembly and connecting device for steering wheel |
| 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 |
| JP2017155802A (en) * | 2016-03-01 | 2017-09-07 | 倉敷化工株式会社 | Vibration-proof device |
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114439834B (en) | 2023-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211314835U (en) | Anti-fatigue rubber joint | |
| CN106314469A (en) | Method for improving overall performance of bogie of rail vehicle and suspension vibration absorption system | |
| CN109532916B (en) | Rotating arm node for railway vehicle and design method thereof | |
| EP3369640A1 (en) | Method for improving overall performance of rail vehicle bogie and suspension damping system | |
| CN103883612A (en) | Large-curvature spherical multilayer split rubber metal joint | |
| CN114439834A (en) | Low-ellipticity center pin bush capable of realizing bidirectional variable rigidity requirement | |
| CN108032866A (en) | A kind of method and pivoted arm node for improving pivoted arm node radial-axial rigidity property | |
| CN107776602A (en) | By the method and structure that adjust rubber layer parameter change axle box guidance joint rigidity | |
| JPS58403A (en) | Radial tire good in bead durability | |
| CN106627642B (en) | By the method and pivoted arm node that change pivoted arm node structure size adjusting rigidity | |
| CN106627638A (en) | Method for adjusting thickness of rubber layers to prevent axle box bearing from being abraded and tumbler joints | |
| CN113503309B (en) | Method for reducing deflection torsional rigidity of multilayer rod end spherical hinge and multilayer rod end spherical hinge | |
| CN108438010B (en) | Method for preventing rotating arm node of high-speed motor train unit from axially shifting | |
| CN207345830U (en) | Axle box guidance joint | |
| CN110254460B (en) | Connecting rod for anti-side-rolling torsion bar and method for improving load tolerance of connecting rod | |
| CN207345833U (en) | Axle box guidance joint | |
| CN106627640A (en) | Method for preventing axle box bearing from being abraded by adjusting rubber layer bevels and rotating arm joints | |
| CN106143035A (en) | A kind of bush of swing arm and body connection structure | |
| CN115654048A (en) | Lightweight method of center pin bush and center pin bush | |
| CN209833634U (en) | Central pin bush for railway vehicle bogie traction device | |
| CN109340287A (en) | A kind of the traction flexural pivot and deflection stiffness adjusting method of adjustable deflection rigidity | |
| CN107719402A (en) | The stiffness tuning method and axle box guidance joint of axle box guidance joint | |
| CN107719401B (en) | Rigidity adjusting method for split outer sleeve axle box positioning node and axle box positioning node | |
| CN113503311B (en) | Method and structure facilitating preassembly of multilayer rod end spherical hinge before vulcanization | |
| CN211764767U (en) | Automobile suspension bush and automobile |
Legal Events
| 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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |