CN215752410U - Elastic joint for traction pull rod - Google Patents
Elastic joint for traction pull rod Download PDFInfo
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- CN215752410U CN215752410U CN202121540461.XU CN202121540461U CN215752410U CN 215752410 U CN215752410 U CN 215752410U CN 202121540461 U CN202121540461 U CN 202121540461U CN 215752410 U CN215752410 U CN 215752410U
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- mandrel
- jacket
- outer sleeve
- rubber layer
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Abstract
The utility model belongs to the technical field of vehicle vibration reduction, and particularly relates to an elastic joint for a traction pull rod. The elastic node for the traction pull rod comprises a mandrel, an outer sleeve and a rubber layer; the outer sleeve is provided with a central channel, and the mandrel is arranged in the central channel in a penetrating way; the rubber layer is vulcanized and bonded between the mandrel and the outer sleeve, and the rubber profiles at the two ends of the rubber layer are in a deep cone shape which is inwards sunken. The elastic node for the traction pull rod can greatly release the stress borne by the rubber layer, remarkably reduce the risk of fatigue crack or cracking damage on the rubber profile, prolong the fatigue life of the elastic node for the traction pull rod, and further improve the comfort and safety of vehicle operation.
Description
Technical Field
The utility model belongs to the technical field of vehicle vibration reduction, and particularly relates to an elastic joint for a traction pull rod.
Background
The traction pull rod is a traction device in a railway vehicle bogie, and can effectively ensure the traction force and the braking force between a vehicle body and the bogie. In order to avoid rigid impact between the traction pull rod and the framework, the traction pull rod is connected by an elastic node to ensure the freedom degree of movement and play a role in transferring load and reducing load impact and vibration. Since the traction link needs to have a large longitudinal stiffness, this puts higher demands on the fatigue performance of the elastic joint for the traction link.
As shown in fig. 1, the elastic node for the traction link in the prior art mainly comprises a core shaft 1a, an outer sleeve 2a and a rubber layer 3a, and a rubber profile 31a of the rubber layer 3a is generally in a U-shaped structure recessed inwards. The rubber layer 3a is generally mounted in a pre-compression manner, and the rubber layer 3a is deformed under the influence of a pre-compression force, a traction force or a braking force during use to cause a stress concentration phenomenon. The U-shaped rubber profile 31a can be pleated to form folds in the bearing process, and the positions of the folds appearing each time are inconsistent due to the characteristics of the U-shaped rubber profile, so that a plurality of disordered folds are formed; the U-shaped rubber profile 31a protrudes and is pulled outwards due to extrusion, the stress is not sufficiently released, and after long-term reciprocating deformation, the U-shaped rubber profile 31a can generate fatigue cracks and even cracking damage, so that the fatigue life of the elastic joint for the traction pull rod is greatly shortened, and the comfort and the safety of vehicle running are not facilitated.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the related art, the utility model provides the elastic node for the traction pull rod, which is used for greatly releasing the stress on the rubber layer and prolonging the fatigue life of the elastic node for the traction pull rod.
The utility model provides an elastic joint for a traction pull rod, which comprises:
a mandrel;
the outer sleeve is provided with a central channel, and the mandrel penetrates into the central channel;
the rubber layer is vulcanized and bonded between the mandrel and the outer sleeve, and the rubber profiles at the two ends of the rubber layer are in an inward sunken deep cone shape.
According to the technical scheme, the purpose of greatly releasing the stress borne by the rubber layer is achieved by adopting the inwards-recessed deep-conical rubber profile, the risk of fatigue crack or cracking damage of the rubber profile is obviously reduced, and the fatigue life of the elastic node for the traction pull rod is prolonged.
In some of these embodiments, the portion of the mandrel that is vulcanization bonded to the rubber layer includes a mandrel base section, a mandrel expansion section, and a mandrel transition section connected between the mandrel base section and the mandrel expansion section, the mandrel expansion section projecting beyond the mandrel base section. The technical scheme defines the structural shape of the mandrel which is vulcanized and bonded with the rubber layer.
In some of these embodiments, the jacket includes a jacket base section, a jacket cutback section, and a first jacket transition section connected between the jacket base section and the jacket cutback section, the jacket cutback section being recessed within the jacket base section. The technical scheme defines the structural shape of the jacket vulcanized and bonded with the rubber layer.
In some of these embodiments, the span of the outer jacket thinned section is greater than the span of the mandrel enlarged section. According to the technical scheme, when the rubber layer is subjected to pre-compression force, traction force or braking force, stress generated by the rubber layer is released along the closing direction of the deep conical rubber profile.
In some of these embodiments, the angle of inclination of the mandrel transition is greater than the angle of inclination of the first jacket transition. The technical scheme ensures the free surface of the deep conical rubber profile, so that the stress borne by the rubber layer can be greatly released when the rubber layer is subjected to pre-compression force, traction force or braking force, and the risk of cracks or cracking and damage of the rubber profile is reduced.
In some of these embodiments, the angle of inclination of the mandrel transition is between 10 ° and 40 ° greater than the angle of inclination of the first jacket transition.
In some of these embodiments, the angle of inclination of the mandrel transition is 20 ° greater than the angle of inclination of the first jacket transition.
In some of these embodiments, the jacket includes a jacket base section, a jacket upset section, and a second jacket transition section connected between the jacket base section and the jacket upset section, the jacket upset section projecting beyond the jacket base section. The technical scheme defines the structural shape of the jacket vulcanized and bonded with the rubber layer.
In some of these embodiments, the outer jacket thickening has a span that is greater than the span of the mandrel expansion. According to the technical scheme, when the rubber layer is subjected to pre-compression force, traction force or braking force, stress generated by the rubber layer is released along the closing direction of the deep conical rubber profile.
Based on the technical scheme, the elastic node for the traction pull rod in the embodiment of the utility model can greatly release the stress borne by the rubber layer, remarkably reduce the risk of fatigue crack or cracking damage on the rubber profile, prolong the fatigue life of the elastic node for the traction pull rod and further improve the comfort and safety of vehicle operation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model. In the drawings:
FIG. 1 is a schematic structural view of a prior art elastic joint for a drawbar;
FIG. 2 is a schematic structural diagram of an embodiment of an elastic joint for a drawbar according to the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2;
fig. 4 is a schematic structural view of another embodiment of the elastic node for a traction link according to the present invention.
In fig. 1:
1a, a mandrel; 2a, a jacket; 3a, a rubber layer; 31a, a rubber profile;
in FIGS. 2-4:
1. a mandrel; 11. a mandrel base section; 12. a mandrel expansion section; 13. a mandrel transition section; 2. a jacket; 21. a jacket base section; 22. a jacket thinning section; 23. a first jacket transition section; 24. a thickened section of the outer sleeve; 25. a second jacket transition section; 3. a rubber layer; 31. a rubber profile.
Detailed Description
The technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the utility model, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "inside", "outside", and the like, indicate orientations or positional relationships based on those shown in fig. 2, are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The first embodiment is as follows:
as shown in fig. 2 to 3, the elastic node for a traction link of the present invention comprises a core shaft 1, an outer sleeve 2 and a rubber layer 3. The outer sleeve 2 is provided with a central channel, and the mandrel 1 is arranged in the central channel in a penetrating way; the rubber layer 3 is vulcanized and bonded between the mandrel 1 and the outer sleeve 2, and the rubber profiles 31 at the two ends of the rubber layer 3 are in a deep cone shape which is sunken inwards.
Further, the rubber profile 31 is a deep cone shape, and compared with the U-shaped shape in the prior art, the deep cone shape further increases the degree of freedom of the rubber profile 31; and the nature of the deep-cone shape obviously specifies the point of pleating, i.e. the vertex of the deep cone, thus keeping the position of each pleating of the rubber profile 31 uniform. When the rubber layer 3 is subjected to pre-compression force, traction force or braking force, the rubber layer is closed at a pleating point, stress can be fully released outwards along the closing direction, and the situation that the rubber profile 3 is extruded and pulled outwards to generate cracks or crack damage is avoided.
According to the illustrative embodiment, the inwards-recessed deep-cone-shaped rubber profile 3 is adopted, so that the purpose of greatly releasing the stress borne by the rubber layer 3 is achieved, the risk of fatigue cracks or cracking damage of the rubber profile 31 is obviously reduced, and the fatigue life of the elastic node for the traction pull rod is prolonged.
As shown in fig. 2, in some embodiments, the part of the mandrel 1 which is vulcanization bonded to the rubber layer 3 includes a mandrel base section 11, a mandrel expanding section 12, and a mandrel transition section 13 connected between the mandrel base section 11 and the mandrel expanding section 12, and the mandrel expanding section 12 protrudes out of the mandrel base section 11. The mandrel transition section 13 is smoothly connected with the mandrel basic section 11 and the mandrel expanding section 12. It will be appreciated that the outer wall of the portion of the mandrel 1 to which the rubber layer 3 is vulcanised has a trapezoidal cross-section. The exemplary embodiment specifies the structural shape of the mandrel 1 which is vulcanization bonded to the rubber layer 3.
As shown in fig. 2, in some embodiments, the jacket 2 includes a jacket base section 21, a jacket thinned section 22, and a first jacket transition section 23 connected between the jacket base section 21 and the jacket thinned section 22, the jacket thinned section 22 being recessed within the jacket base section 21. The first jacket transition section 23 is smoothly connected with the jacket base section 21 and the jacket thinning section 22. It will be appreciated that the inner wall of the jacket 2 vulcanised to the rubber layer 3 is trapezoidal in cross-section. The exemplary embodiment specifies the structural shape of the jacket 2 which is vulcanised to the rubber layer 3.
As shown in fig. 2, in some embodiments, the span of the jacket thinned section 22 is greater than the span of the mandrel enlarged section 12. In the exemplary embodiment, when the rubber layer 3 is subjected to a pre-compression force, a traction force or a braking force, the stress generated by the pre-compression force, the traction force or the braking force is released in the closing direction of the deep tapered rubber profile 31, and the fatigue life is improved.
As shown in FIG. 3, in some embodiments, the angle of inclination β of the mandrel transition section 13 is greater than the angle of inclination α of the first jacket transition section 23. Further, the arrangement is such that the thickness at both ends of the rubber layer 3 is larger than the thickness at the center of the rubber layer 3. In this exemplary embodiment, the free surface of the rubber layer 3 is increased; when the rubber profile is subjected to pre-compression force, traction force or braking force, the stress borne by the rubber layer 3 can be outwards and greatly released, the risk of cracks or cracking and damage of the rubber profile 31 is reduced, and the fatigue life is prolonged.
Further, in some embodiments, the angle of inclination β of the mandrel transition section 13 is between 10 ° and 40 ° greater than the angle of inclination α of the first jacket transition section 23; in some embodiments, the angle of inclination β of the mandrel transition section 13 is 20 ° greater than the angle of inclination α of the first jacket transition section 23. It should be noted that the inclination angle difference between the mandrel transition section 13 and the first outer sleeve transition section 23 needs to be designed in a customized manner according to the specific sizes of the outer sleeve 2 and the mandrel 1 and the specific performance requirements of the elastic node for the traction pull rod. The difference in the tilt angles between the mandrel transition section 13 and the first jacket transition section 23 can be flexibly designed and adjusted by those skilled in the art according to the actual situation.
Example two:
compared with the first embodiment, the second embodiment is improved as follows, as shown in fig. 4:
the jacket 2 comprises a jacket base section 21, a jacket thickened section 24 and a second jacket transition section 25 connected between the jacket base section 21 and the jacket thickened section 24, the jacket thickened section 24 protruding out of the jacket base section 21. The second jacket transition section 25 is smoothly connected with the jacket base section 21 and the jacket thickened section 24. It will be appreciated that the inner wall of the jacket 2 vulcanised to the rubber layer 3 is trapezoidal in cross-section. The exemplary embodiment specifies the structural shape of the jacket 2 which is vulcanised to the rubber layer 3.
Further, it is understood that the trapezoidal shape of the cross section of the inner wall of the sheath 2 of this embodiment is in an inverse relationship with the trapezoidal shape of the cross section of the outer wall of the mandrel 1, so that the thickness of the rubber layer 3 at both ends is larger than the thickness of the center of the rubber layer 3. This exemplary embodiment, too, increases the free surface of the rubber layer 3; when the rubber profile is subjected to pre-compression force, traction force or braking force, the stress borne by the rubber layer 3 can be outwards and greatly released, the risk of cracks or cracking and damage of the rubber profile 31 is reduced, and the fatigue life is prolonged.
In some embodiments, the span of the jacket thickening section 24 is greater than the span of the mandrel expansion section 12. The exemplary embodiment also allows the stresses generated by the rubber layer 3 when it is subjected to pre-compression, traction or braking forces to be released in the direction in which the deep-tapered rubber profile 31 closes.
By way of illustration of various embodiments of the resilient joint for a towing drawbar according to the utility model, it will be seen that the utility model has at least one or more of the following advantages:
1. the arrangement of the deep conical rubber profile 31 which is recessed inwards increases the degree of freedom of the rubber profile 31 and specifies a pleating point; when the rubber layer 3 is subjected to pre-compression force, traction force or braking force, the rubber layer is closed at a pleating point, stress can be fully released outwards along the closing direction, the risk of fatigue crack or cracking damage of the rubber profile 31 is remarkably reduced, and the fatigue life of the elastic node for the traction pull rod is prolonged;
2. the inclination angle beta of the mandrel transition section 13 is larger than the inclination angle alpha of the first outer sleeve transition section 23, so that the free surface of the rubber layer 3 is increased; when the rubber is subjected to pre-compression force, traction force or braking force, the stress borne by the rubber layer can be greatly released outwards, the risk of cracks or cracking and damage of the rubber profile 31 is reduced, and the fatigue life is prolonged;
3. the span of the outer sleeve thinning section 22 is larger than that of the mandrel expanding section 12, and the arrangement enables stress generated by the rubber layer 3 when the rubber layer is subjected to pre-compression force, traction force or braking force to be released along the closing direction of the deep conical rubber profile 31, so that the fatigue life is prolonged.
Finally, it should be noted that: the embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the utility model or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the utility model as defined by the appended claims.
Claims (9)
1. An elastic joint for a traction link, comprising:
a mandrel;
the outer sleeve is provided with a central channel, and the mandrel is arranged in the central channel in a penetrating mode;
the rubber layer is vulcanized and bonded between the mandrel and the outer sleeve, and the rubber profiles at the two ends of the rubber layer are in an inward sunken deep cone shape.
2. The elastic joint for a traction link according to claim 1, wherein the portion of the mandrel vulcanization bonded to the rubber layer comprises a mandrel base section, a mandrel expansion section, and a mandrel transition section connected between the mandrel base section and the mandrel expansion section, the mandrel expansion section protruding beyond the mandrel base section.
3. The elastic joint for a traction link of claim 2 wherein said outer jacket includes an outer jacket base section, an outer jacket weakened section and a first outer jacket transition section connected between said outer jacket base section and said outer jacket weakened section, said outer jacket weakened section being recessed within said outer jacket base section.
4. The tension link spring node of claim 3, wherein the outer jacket thinned section has a span greater than the span of the mandrel enlarged section.
5. The tension link spring node of claim 3, wherein the angle of inclination of the core transition section is greater than the angle of inclination of the first jacket transition section.
6. The elastic joint for a traction link according to claim 5, wherein the inclination angle of the core shaft transition section is greater than the inclination angle of the first jacket transition section by 10 ° to 40 °.
7. The resilient joint for a traction link of claim 6 wherein said mandrel transition has an angle of inclination that is 20 ° greater than an angle of inclination of said first jacket transition.
8. The elastic joint for a traction link of claim 2 wherein said outer sleeve includes an outer sleeve base section, an outer sleeve upset section, and a second outer sleeve transition section connected between said outer sleeve base section and said outer sleeve upset section, said outer sleeve upset section projecting beyond said outer sleeve base section.
9. The tension link spring node of claim 8, wherein the outer sleeve upset has a span that is greater than the span of the mandrel enlarged section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121540461.XU CN215752410U (en) | 2021-07-07 | 2021-07-07 | Elastic joint for traction pull rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121540461.XU CN215752410U (en) | 2021-07-07 | 2021-07-07 | Elastic joint for traction pull rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215752410U true CN215752410U (en) | 2022-02-08 |
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ID=80104317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121540461.XU Active CN215752410U (en) | 2021-07-07 | 2021-07-07 | Elastic joint for traction pull rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215752410U (en) |
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2021
- 2021-07-07 CN CN202121540461.XU patent/CN215752410U/en active Active
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