CN110397700B - Method for forming liquid cavity by additionally arranging four-petal type middle spacer bush and cavity structure - Google Patents
Method for forming liquid cavity by additionally arranging four-petal type middle spacer bush and cavity structure Download PDFInfo
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- CN110397700B CN110397700B CN201910816765.5A CN201910816765A CN110397700B CN 110397700 B CN110397700 B CN 110397700B CN 201910816765 A CN201910816765 A CN 201910816765A CN 110397700 B CN110397700 B CN 110397700B
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- 239000007788 liquid Substances 0.000 title claims abstract description 94
- 125000006850 spacer group Chemical group 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000013040 rubber vulcanization Methods 0.000 claims abstract description 7
- 238000005538 encapsulation Methods 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000004636 vulcanized rubber Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 abstract description 10
- 238000007789 sealing Methods 0.000 description 14
- 238000013461 design Methods 0.000 description 13
- 238000013016 damping Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 238000004073 vulcanization Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005465 channeling Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010073 coating (rubber) Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007769 metal material Substances 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
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
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- General Engineering & Computer Science (AREA)
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- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a method for forming a liquid cavity by additionally arranging a four-petal type middle spacer and a cavity structure, wherein the method comprises the steps of firstly additionally arranging the four-petal type middle spacer on a mandrel and a jacket, then hollowing out the four-petal type middle spacer to form a plurality of spaces, and then bonding the four-petal type middle spacer and the mandrel together through rubber vulcanization, wherein the plurality of liquid cavities which are mutually independent are formed by utilizing rubber and the four-petal type middle spacer. The invention can provide smaller radial rigidity and larger axial rigidity, and realize larger dynamic-static ratio, thereby optimizing the product performance of the liquid rubber composite node.
Description
Technical Field
The invention relates to a method and a structure for forming a liquid cavity in a liquid rubber composite node, in particular to a method and a cavity structure for forming a liquid cavity by additionally arranging four-petal type middle spacer bush.
Background
When the rotating arm node runs at a high speed (high-frequency vibration) in a straight line according to the dynamics requirement, larger radial rigidity is provided to ensure the running stability and improve the critical speed; when the curve is crossed (low frequency and large amplitude), the smaller rigidity performance is provided to ensure the curve crossing performance, so that the abrasion is reduced; the common node is difficult to realize the characteristics, particularly for old lines, the wheel rail and the lines are more worn, and the maintenance cost is high, so that a new product is needed to be used, and the novel node has the characteristics, namely the liquid rubber composite node.
Liquid rubber composite rotary arm node working principle: two hollow cavity structures are designed in the rubber part, the two cavities are communicated through a runner design, and incompressible (viscous) liquid is filled and sealed in one cavity in advance. The volumes in the two cavities change under the action of load, and liquid flows between the two cavities to generate damping, so that vibration energy is consumed, and the purpose of damping vibration is achieved. When in low-frequency vibration, liquid flows up and down through the channel, so that a large damping effect is achieved, liquid in a high-frequency section does not flow, the damping value is small, vibration is effectively isolated, dynamic rigidity is basically stable and kept unchanged under high-frequency vibration, and the effect of preventing dynamic hardening is achieved. The frequency ratio of the system is basically kept unchanged, and a good vibration reduction effect is still achieved.
The related domestic patent documents are found through searching as follows:
1. The invention patent of China with the bulletin number of CN102644693A and the bulletin day of 2012 of 8 months of 22 days discloses a dynamic stiffness adjusting method of a rubber joint with liquid damping, wherein more than two closed cavities are arranged in the rubber joint, the closed cavities are communicated with each other through a throttling channel, an adjusting device for controlling the flow area of the throttling channel is arranged on the throttling channel, and the size of the throttling channel is adjusted through the adjusting device, so that the damping force is adjusted, and the required dynamic stiffness of the rubber joint is obtained.
2. The Chinese invention patent with the bulletin number of CN105501242A and the bulletin date of 2016, 4 and 20 discloses a rubber node which comprises: the mandrel, the outer sleeve and the rubber layer; the rubber layer is filled between the mandrel and the outer sleeve, a first cavity and a second cavity are respectively formed in two sides of the rubber layer, which are symmetrical to the mandrel, a first communication channel which is connected with the first cavity and the second cavity is arranged in the rubber node, and liquid is filled in the first cavity and the second cavity and is not filled in the first cavity and the second cavity.
3. The Chinese patent with the bulletin number of CN204845947U and the bulletin day of 2015 of 12 month 9 discloses an axle box node, which comprises a mandrel, an elastic sleeve and a shell, wherein the middle part of the mandrel is provided with a through hole penetrating through the mandrel, the elastic sleeve is sleeved on the outer wall of the mandrel, the elastic sleeve is provided with a first cavity and a second cavity, the bottom of the first cavity and the bottom of the second cavity are respectively communicated with two ends of the through hole to form a cavity, liquid is arranged in the cavity, and the shell is sleeved outside the elastic sleeve.
4. The Chinese patent with publication number CN109455191A and publication day 2019 3-12 discloses a rigidity-variable rotary arm node, which comprises a jacket, a main spring, an auxiliary spring and a mandrel, wherein an oil pipe is wound on the surface of the mandrel, the main spring is vulcanized into a whole by two parts of rubber and metal parts, the metal parts of the main spring are pressed together with the mandrel, the auxiliary spring is pressed at two ends of the main spring and is vulcanized into a whole by two parts of rubber and metal parts corresponding to the main spring, the peripheries of the main spring and the auxiliary spring are pressed with jackets, the mandrel is used as a symmetrical shaft, two oil cavities are arranged between the jackets and the main spring, and the two oil cavities are respectively communicated with two ports of the corresponding oil pipe.
The method of forming the liquid cavity in the above patent documents is different from the technical solution in the present application.
In summary, it is highly desirable to design a method and a cavity structure for forming a liquid cavity, so that the liquid cavity can provide smaller radial stiffness and larger axial stiffness, and realize larger dynamic-static ratio at the same time, thereby optimizing the product performance of the liquid rubber composite node.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method for forming a liquid cavity by additionally arranging a four-petal type middle spacer bush and a cavity structure, which can provide smaller radial rigidity and larger axial rigidity, realize larger dynamic and static ratio and optimize the product performance of a liquid rubber composite node.
In order to solve the technical problems, the invention adopts the following technical scheme: a method for forming liquid cavity by adding four-petal type middle spacer bush includes such steps as adding four-petal type middle spacer bush to mandrel and jacket, hollowing out to form multiple spaces, vulcanizing rubber between said two spacers, and adhering them together to form multiple liquid cavities.
Preferably, the specific forming method of the liquid cavity is that a plurality of spaces are dug out on the four-petal type middle spacer, and the outer side end and the inner side end of the space are both open;
After the mandrel and the four-petal type middle spacer bush are bonded together through rubber vulcanization, the inner side end port of the space is blocked by vulcanized rubber; and an arc-shaped cover plate is covered on the hollowed four-petal middle spacer bush, and the outer side end port of the space is blocked by utilizing the arc-shaped cover plate, so that each space forms an independent liquid cavity.
Preferably, a step part is arranged on the four-petal type middle spacer bush at the periphery of the opening at the outer side end of the space, the step part is arranged for a whole circle along the opening at the outer side end of the space, and the arc-shaped cover plate covers the step part.
Preferably, when the mandrel and the four-lobe middle spacer are bonded together through rubber vulcanization, rubber is coated on the step part, then the arc-shaped cover plate is covered on the step part, so that the arc-shaped cover plate is contacted with the rubber coating on the step part, the four-lobe middle spacer with the arc-shaped cover plate is assembled into the outer sleeve in an interference manner, and the arc-shaped cover plate is pressed on the step part by utilizing acting force generated after assembly.
Preferably, two liquid cavities are arranged, and the two liquid cavities are respectively arranged on an upper arc-shaped valve body and a lower arc-shaped valve body which are symmetrically arranged in the four-valve middle spacer bush in the axial direction of the mandrel.
Preferably, the two liquid cavities are communicated through a flow channel, and the flow channel is formed by the following steps: the outer sleeve is an integral sleeve, the periphery of the runner sleeve is provided with runner grooves, and the runner grooves are distributed on the periphery of the runner sleeve in a surrounding manner; the integral jacket is assembled on the outer peripheral surface of the runner jacket, the notch of the runner groove is shielded and sealed by the inner peripheral surface of the integral jacket, a runner is formed, one end of the runner is communicated with one liquid cavity, and the other end of the runner is communicated with the other cavity.
Preferably, the bottoms of the two ends of the runner groove are respectively provided with a runner through hole, and the arc-shaped cover plate is provided with a cover plate through hole, and the runner through holes and the cover plate through holes are mutually communicated, so that the two liquid cavities are communicated through the runner.
Preferably, if the diameter of the through hole of the cover plate is R1 and the diameter of the through hole of the runner is R2, R1 is less than R2.
Preferably, before assembly, gaps E are reserved between the end surfaces of the two adjacent petals, which are close to each other, of each petal, and after assembly, the gaps E disappear, and the end surfaces of the two adjacent petals are in contact with each other; an opening gap F is also left in the rubber at each gap E, which opening gap F is filled with deformed rubber after assembly, so that the opening gap F disappears.
The invention also discloses a cavity structure, which comprises an outer sleeve, a mandrel, a four-petal type middle spacer bush arranged between the outer sleeve and the mandrel, wherein the four-petal type middle spacer bush and the mandrel are bonded together through rubber vulcanization, a plurality of spaces are formed by hollowing the four-petal type middle spacer bush, and a plurality of mutually independent liquid cavities are formed by utilizing rubber and the plurality of spaces after vulcanization.
The invention has the beneficial effects that: according to the invention, a plurality of independent liquid cavities capable of storing liquid are formed by hollowing out and vulcanizing the rubber on the additionally arranged four-petal type middle spacer bush, so that smaller radial rigidity and larger axial rigidity can be provided, and meanwhile, larger dynamic-static ratio is realized, thereby optimizing the product performance of the liquid rubber composite node. Through the design of the convection forming method, firstly, the assembly is convenient, secondly, the fact that liquid can only flow along the designed runner groove route in the outer groove runner is guaranteed, the phenomenon of channeling can not occur, and the reliability of products is further improved. By designing the specific forming method of the liquid cavity, the liquid cavity can be smoothly formed, and the product quality is ensured. Through the design of the four-petal type middle spacer bush assembly structure and the process, the direct contact between the end faces of the two adjacent petals is guaranteed after the interference assembly is completed, rubber is prevented from being involved, and the performance of the assembled product can be further improved. The four-petal type middle spacer bush adopts a non-equal division design, so that the volume space of the liquid cavity is expanded as much as possible.
Drawings
FIG. 1 is a schematic view of a node cross-sectional structure along a radial direction of a mandrel in an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic diagram of a front view of a jacket of a runner in an embodiment of the present invention;
FIG. 4 is an enlarged schematic view of the portion B in FIG. 1;
FIG. 5 is an enlarged schematic view of the portion C in FIG. 2;
FIG. 6 is a schematic cross-sectional view of a four-lobed intermediate spacer in the radial direction of a mandrel in accordance with an embodiment of the present invention;
FIG. 7 is an enlarged schematic view of the portion D in FIG. 1;
FIG. 8 is an enlarged schematic view of the portion D of FIG. 1, with the four-lobed intermediate spacer not assembled into the outer sleeve;
In the figure: 1. the novel sealing ring comprises a jacket, 111, a runner jacket, 112, a whole jacket, 1121, a turnup part of the jacket, 2, a mandrel, 211, a mandrel lug, 3, a four-lobe middle spacer bush, 311, a left arc-shaped lobe body, 312, a right arc-shaped lobe body, 313, an upper arc-shaped lobe body, 314, a lower arc-shaped lobe body, 4, rubber, 411, a rubber block, 412, middle section rubber, 413, end rubber, 414, a rubber lug, 5, a liquid cavity, 6, a runner groove, 611, a horizontal runner groove, 612, a vertical runner groove, 613, a closing-up runner groove, 614, a closing-up runner groove, 615, a closing-up runner groove, three, 47, a runner through hole, 8, a runner through hole, 9, an arc-shaped cover plate, 911, a cover plate through hole 912, a lug, 10, a step part, 11, a sealing ring, 12, a liquid injection hole, 13, a step part I, 14, a step part II and 15.
Detailed Description
The technical scheme of the invention is further elaborated below with reference to the drawings and specific embodiments.
Examples: as shown in fig. 1 and 2, the liquid rubber composite node comprises an outer sleeve 1, a mandrel 2 and a four-flap type middle spacer 3 which is additionally arranged between the outer sleeve 1 and the mandrel 2, wherein the four-flap type middle spacer 3 and the mandrel 2 are vulcanized and bonded together through rubber 4, and then the integrated four-flap type middle spacer and the mandrel are assembled into the outer sleeve 1; the jacket 1 is provided with a runner, the four-petal middle spacer bush 3 is hollowed to form a plurality of spaces, after vulcanization, a plurality of mutually independent liquid cavities 5 are formed by using the rubber 4 and the plurality of spaces, liquid (not shown in the figure) is arranged in the plurality of liquid cavities 5, and the plurality of liquid cavities 5 are communicated through the runner.
The method for forming the liquid cavity by additionally arranging the four-petal type middle spacer sleeve is that a plurality of spaces are formed by hollowing the four-petal type middle spacer sleeve 3, then the four-petal type middle spacer sleeve 3 and the mandrel 2 are bonded together through vulcanization of rubber 4, and a plurality of mutually independent liquid cavities 5 are formed by utilizing the rubber 4 and the four-petal type middle spacer sleeve 3. The node with the liquid cavity formed by the method can provide larger axial rigidity and realize larger dynamic-static ratio, thereby optimizing the product performance of the liquid rubber composite node.
The applicant has carried out test data by subjecting several samples as follows:
| Radial stiffness | Axial stiffness | Dynamic-static ratio | |
| Sample 1 | 5.68 | 13.16 | 6.5：1 |
| Sample 2 | 5.57 | 12.62 | 7：1 |
| Sample 3 | 5.54 | 12.38 | 6：1 |
| Sample 4 | 5.34 | 13.02 | 6：1 |
| Sample 5 | 5.25 | 11.68 | 5：1 |
As shown in fig. 1,3 and 5, in the present embodiment, two liquid cavities (an upper liquid cavity located above and a lower liquid cavity located below in fig. 1) are provided, and the liquid cavities are formed as follows: firstly, two spaces (such as spaces X1 and X2 in fig. 1) are dug out on the four-flap type middle spacer 3, the spaces X1 and X2 are similar to through holes, the outer side end and the inner side end of the spaces are both open, one end of the space near the mandrel 2 is regarded as the inner side end, one end of the space far away from the mandrel 2 is regarded as the outer side end, in order to ensure that the liquid cavity can store liquid, the two end openings of each space need to be sealed so that each space is formed independently, and in the embodiment, when the inner side end openings of the spaces are sealed, the sealing is performed by using rubber 4, namely: after the mandrel 2 and the four-petal type middle spacer bush 3 are vulcanized and bonded together through rubber 4, the inner side end port of the space is blocked by the vulcanized rubber 4 through design; when the opening of the outer side end of the space is sealed, an arc-shaped cover plate 9 is covered on the hollowed four-petal middle spacer bush 3, and the opening of the outer side end of the space is blocked by the arc-shaped cover plate 9, so that each space forms an independent liquid cavity. The four-petal type middle spacer bush 3 on the periphery of the opening at the outer side end of the space is provided with a step part 10, the step part 10 is provided with a whole circle along the opening at the outer side end of the space, the arc-shaped cover plate 9 covers the step part 10, and one function of the step part 10 is used as a positioning structure, so that the arc-shaped cover plate 9 is convenient to position and assemble. In this embodiment, the mandrel, the outer sleeve, the four-lobe middle spacer and the arc-shaped cover plate may all be made of metal materials.
As shown in fig. 5, in order to further secure the tightness of the outer end port of the space, it is also necessary to perform this by fitting in a manner of encapsulation and press fitting, that is, in this embodiment, the jacket 1 includes the runner jacket 111 and the integral jacket 112, rubber is encapsulated onto the step portion 10 at the time of encapsulation, and the encapsulation thickness may be set according to practical situations. During assembly, the mandrel 2 and the hollowed four-flap middle spacer 3 are vulcanized into a whole through the rubber 4, the rubber is encapsulated on the step part 10, the arc-shaped cover plate 9 is covered on the step part 10, the arc-shaped cover plate 9 is in contact with the encapsulation on the step part 10, the four-flap middle spacer 3 with the arc-shaped cover plate 9 is assembled into the runner jacket 111 in an interference mode, the arc-shaped cover plate 9 is pressed on the step part 10 by utilizing acting force generated after assembly, the encapsulation on the step part 10 is deformed, a sealing effect is achieved, and finally the runner jacket 111 is assembled into the integral jacket 112 in an interference mode, so that the sealing performance is further improved. When the integral jacket 112 is assembled, a certain reduction can be further designed for the integral jacket, so that the sealing effect is further improved.
As shown in fig. 6, the four-lobe middle spacer 3 includes a left arc-shaped lobe 311, a right arc-shaped lobe 312, an upper arc-shaped lobe 313 and a lower arc-shaped lobe 314, and the four lobes are circumferentially enclosed to form the spacer. As shown in fig. 8, before the four-petal middle spacer and the mandrel are not subjected to interference fit after being vulcanized and bonded by rubber, gaps E (such as a gap E between one end of the left arc-shaped petal 311 and one end of the lower arc-shaped petal 314 in fig. 8) are reserved between the end surfaces of two adjacent petals, and an opening gap F is reserved in the rubber 4 and at each gap E; however, after the node is assembled in an interference manner, as shown in fig. 7, under the influence of the acting force, the gap E and the adjacent opening gap F are not visible, i.e. the end surfaces of the two ends of each petal body, which are close to each other, are in contact with each other, and the opening gap F is filled with the deformed rubber 4, so that the performance of the assembled product can be further improved. As shown in fig. 8, in this embodiment, the opening gap F is a U-shaped groove, the opening of the U-shaped groove faces the gap E, and the extending lines of the radial extensions of the four-petal middle spacer at the two side edges of the U-shaped groove are respectively overlapped with the end faces of the two adjacent ends of the two petals at the gap E, and the depth of the U-shaped groove is designed according to the actual assembly condition. By providing the opening gap F, it is ensured that the end surfaces of the two mutually approaching ends of each flap body are in direct contact with each other after assembly, and no rubber is involved between them.
In the design of the four-lobe middle spacer, an equally divided design may be adopted, or an unequally divided design may be adopted, in this embodiment, an unequally divided design is adopted, that is, the center point of the four-lobe middle spacer is taken as a round point, the circle center angles corresponding to the plurality of arc-shaped lobe bodies are unequal, as shown in fig. 6, the radian of the upper arc-shaped lobe body 313 and the circle center angle corresponding to the lower arc-shaped lobe body 314 are all set to be α, the circle center angles corresponding to the left arc-shaped lobe body 311 and the right arc-shaped lobe body 312 are all set to be β, and α > β. This is because, in this embodiment, the hollowed arc-shaped valve body is the radian of the upper arc-shaped valve body 313 and the lower arc-shaped valve body 314, after the cavity is hollowed, the direction along the radian of the upper arc-shaped valve body 313 and the direction of the lower arc-shaped valve body 314 (i.e. the Y direction in the figure) is the hollow direction, and the direction along the left arc-shaped valve body 311 and the right arc-shaped valve body 312 (i.e. the X direction in the figure) is the solid direction, so that the radian of the hollow upward arc-shaped valve body is increased as much as possible, and the volume of the liquid cavity can be increased as much as possible, thereby being beneficial to the improvement of the product performance. In addition, the radial stiffness in the air direction can be reduced. In this embodiment, α is 120 degrees and β is 60 degrees.
The hollowed-out petals can be any petal in the four-petal middle spacer, and in the embodiment, the radian of the upper arc-shaped petals 313 and the lower arc-shaped petals 314 symmetrically arranged around the axial direction of the mandrel 2 are hollowed out to form a liquid cavity.
As shown in fig. 2, the mandrel 2 is formed as one mandrel having a central axis N of the mandrel 2 as a generatrix and saddle-shaped surfaces G having both ends high and a middle bottom as a rotation surface. The mandrel is arranged such that the rubber 4 between the mandrel and the four-lobed intermediate spacer is divided into two parts, one part is the intermediate rubber 412, the other part is the end rubber 413 located at both ends of the intermediate rubber 412, the thickness of the intermediate rubber 412 in the radial direction of the mandrel is set to be the radial thickness H1, and the thickness of the end rubber 413 in the axial direction of the mandrel is set to be the axial thickness H2. In operation, the middle section rubber 412 provides primarily radial stiffness and the end section rubber 413 provides primarily axial stiffness, such that the radial stiffness and axial stiffness of the node can be adjusted by adjusting the radial thickness H1 and axial thickness H2.
The mandrel 2 is also provided with a liquid injection hole 12, the liquid injection hole 12 is communicated with the liquid cavity 5, and liquid is injected into the liquid cavity 5 through the liquid injection hole 12 and then sealed at the beginning.
When the device works, the two liquid cavities are communicated through the runner, so that the liquid can flow back and forth between the two liquid cavities. The flow passage in the present embodiment is provided in the outer jacket 1, and as shown in fig. 3 and 5, the flow passage is formed as follows: the jacket 1 is provided with an inner jacket and an outer jacket, the inner jacket is a runner jacket 111, the outer jacket is an integral jacket 112, the periphery of the runner jacket 111 is provided with runner grooves 6, the runner grooves 6 are spirally distributed on the periphery of the runner jacket 111, and the runner grooves 6 can be arranged in other shapes instead of spirally. The integral jacket 112 is sleeved on the runner jacket 111, and the notch of the runner groove is blocked and sealed by the inner peripheral surface of the integral jacket 112 to form an outer groove runner, so that liquid can only flow along the spiral length direction of the spiral runner groove 6. Because the runner groove is heliciform and its notch is open state, consequently, in order to guarantee the effect that liquid can only flow along the heliciform runner groove's helical length direction, need seal the notch of runner groove, prevent to place the horizontal cross-flow of liquid between heliciform runner groove, this embodiment is in the assembly, the runner overcoat is through interference fit to whole overcoat in, after the surplus assembly, utilize the cohesion between runner overcoat and the outside overcoat, seal the notch of runner groove for liquid can only flow along the heliciform runner groove's helical length direction, and can not cross-flow between heliciform runner groove, further improved the reliability of product.
The bottom of one end of the runner groove 6 is provided with a runner through hole I7, the bottom of the other end of the runner groove 6 is provided with a runner through hole II 8, the runner through hole I7 is communicated with one liquid cavity 5 and the runner through hole II 8 is communicated with the other liquid cavity 5, and therefore a plurality of liquid cavities 5 are communicated through an outer groove runner.
The arc-shaped cover plate 9 is further provided with a cover plate through hole 911, and the position of the cover plate through hole 911 on the arc-shaped cover plate 9 is set according to the position of the runner through hole at the end part of the runner groove 6, namely, the set cover plate through hole 911 and the runner through hole are mutually communicated, namely, the cover plate through hole 911 on the arc-shaped cover plate 9 on one liquid cavity is mutually communicated with the runner through hole 7 at the end part of the runner groove 6, and the cover plate through hole 911 on the arc-shaped cover plate 9 on the other liquid cavity is mutually communicated with the runner through hole 8 at the other end part of the runner groove 6. When the device is arranged, the projection area of the port of the cover plate through hole on the radial projection surface of the cover plate through hole and the projection area of the port of the runner through hole on the radial projection surface of the cover plate through hole are completely or partially overlapped with each other, and in the embodiment, the diameter R1 of the cover plate through hole is smaller than the diameter R2 of the runner through hole, so that the device is more convenient to assemble.
The arc-shaped cover plate 9 is further provided with a sealing groove on the outer peripheral surface and located at the outer periphery of the cover plate through hole, the sealing ring 11 is placed in the sealing groove, the height of the sealing ring 11 is higher than the groove depth of the sealing groove before interference fit, and after interference fit, the sealing ring 11 is tightly pressed by acting force to fill the sealing groove, so that a sealing structure is formed.
In summary, the invention forms a plurality of independent liquid cavities capable of storing liquid by hollowing out and vulcanizing the rubber on the additionally arranged four-petal middle spacer bush, thus providing smaller radial rigidity and larger axial rigidity, realizing larger dynamic-static ratio and optimizing the product performance of the liquid rubber composite node. Through the design of the convection forming method, firstly, the assembly is convenient, secondly, the fact that liquid can only flow along the designed runner groove route in the outer groove runner is guaranteed, the phenomenon of channeling can not occur, and the reliability of products is further improved. By designing the specific forming method of the liquid cavity, the liquid cavity can be smoothly formed, and the product quality is ensured. Through the design of the four-petal type middle spacer bush assembly structure and the process, the direct contact between the end faces of the two adjacent petals is guaranteed after the interference assembly is completed, rubber is prevented from being involved, and the performance of the assembled product can be further improved. The four-petal type middle spacer bush adopts a non-equal division design, so that the volume space of the liquid cavity is expanded as much as possible.
The term "plurality" as used in this embodiment means the number of "two or more". The above embodiments are only for illustrating the present invention, not for limiting the present invention, and various changes and modifications may be made by one skilled in the relevant art without departing from the spirit and scope of the present invention, so that all equivalent technical solutions shall fall within the scope of the present invention, which is defined by the claims.
Claims (4)
1. A method for forming a liquid cavity by additionally arranging a four-petal type middle spacer is characterized in that: the four-petal type middle spacer bush is additionally arranged on a mandrel and a jacket, then a plurality of spaces are formed by hollowing the four-petal type middle spacer bush, the four-petal type middle spacer bush and the mandrel are bonded together through rubber vulcanization, and a plurality of mutually independent liquid cavities are formed by utilizing the rubber and the four-petal type middle spacer bush;
The concrete forming method of the liquid cavity comprises the steps of firstly digging a plurality of spaces on a four-petal type middle spacer bush, wherein the outer side end and the inner side end of the space are both open;
After the mandrel and the four-petal type middle spacer bush are bonded together through rubber vulcanization, the inner side end port of the space is blocked by vulcanized rubber; an arc cover plate is covered on the hollowed four-petal type middle spacer bush, and the outer side end port of the space is blocked by the arc cover plate, so that each space forms an independent liquid cavity;
A step part is arranged on the four-petal type middle spacer bush at the periphery of the opening at the outer side end of the space, the step part is arranged for a whole circle along the opening at the outer side end of the space, and an arc cover plate covers the step part;
When the mandrel and the four-lobe middle spacer are bonded together through rubber vulcanization, rubber is encapsulated on the step part, then an arc-shaped cover plate is covered on the step part, so that the arc-shaped cover plate is contacted with the encapsulation on the step part, the four-lobe middle spacer with the arc-shaped cover plate is assembled into the outer sleeve in an interference manner, and the arc-shaped cover plate is pressed on the step part by utilizing acting force generated after assembly;
The two liquid cavities are respectively arranged on an upper arc-shaped valve body and a lower arc-shaped valve body which are symmetrically arranged in the four-valve middle spacer bush along the axial direction of the mandrel;
The two liquid cavities are communicated through a flow passage, and the flow passage is formed by the following steps: the outer sleeve is an integral sleeve, the periphery of the runner sleeve is provided with runner grooves, and the runner grooves are distributed on the periphery of the runner sleeve in a surrounding manner; the integral jacket is assembled on the outer peripheral surface of the runner jacket, the notch of the runner groove is shielded and sealed by the inner peripheral surface of the integral jacket to form a runner, one end of the runner is communicated with one liquid cavity, and the other end of the runner is communicated with the other liquid cavity; the four-petal type middle spacer bush with the arc-shaped cover plate is assembled into the outer sleeve in an interference mode, namely the four-petal type middle spacer bush with the arc-shaped cover plate is assembled into the runner outer sleeve in an interference mode, and finally the runner outer sleeve is assembled into the integral outer sleeve in an interference mode.
2. The method according to claim 1, characterized in that: the two ends of the flow channel groove are provided with flow channel through holes, and the arc cover plate is provided with cover plate through holes, and the flow channel through holes and the cover plate through holes are mutually communicated, so that the two liquid cavities are communicated through the flow channel.
3. The method according to claim 2, characterized in that: let the diameter of the through hole of the cover plate be R1, and the diameter of the through hole of the runner be R2, R1 is less than R2.
4. The method according to claim 1 or 2, characterized in that: before assembly, gaps E are reserved between the end faces of the adjacent two ends, close to each other, of each petal body, and after assembly, the gaps E disappear, and the end faces of the two ends, close to each other, of each petal body are in contact with each other; before the assembly, an opening gap F is also left in the rubber at each gap E, which is filled with deformed rubber after the assembly, so that the opening gap F disappears.
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| CN111706638B (en) * | 2020-05-27 | 2022-01-21 | 株洲时代新材料科技股份有限公司 | Hydraulic composite bushing and sealing method thereof |
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Effective date of registration: 20200603 Address after: 412007 No.301, physical and chemical building, Liyu Industrial Park, no.639, Heilongjiang Road, Tianyuan District, Zhuzhou City, Hunan Province Applicant after: Zhuzhou Times Ruiwei damping equipment Co.,Ltd. Address before: 412007 No. 18 Haitian Road, Tianyuan District, Hunan, Zhuzhou Applicant before: Zhuzhou Times New Material Technology Co.,Ltd. |
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