CN210889897U

CN210889897U - Liquid rubber composite node with outer groove flow channel

Info

Publication number: CN210889897U
Application number: CN201921431595.0U
Authority: CN
Inventors: 陈俊辉; 张玉祥; 李静; 罗俊; 曾先会; 黄江彪
Original assignee: Zhuzhou Times Ruiwei Damping Equipment Co Ltd
Current assignee: Zhuzhou Times Ruiwei Damping Equipment Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-06-30
Anticipated expiration: 2029-08-30

Abstract

The utility model discloses a liquid rubber compound node with outer groove runner, including overcoat, dabber and well spacer sleeve, well spacer sleeve passes through rubber vulcanization bonding with the dabber and is in the same place, and in well spacer sleeve assembled the overcoat, be provided with the outer groove runner in the overcoat, still be provided with a plurality of spaces on well spacer sleeve, after vulcanizing, utilize rubber with a plurality of spaces form a plurality of liquid cavities of mutual independence, are provided with between liquid and a plurality of liquid cavities and are linked together through the outer groove runner. The utility model discloses can provide less radial stiffness and great axial stiffness, realize great sound to compare to the product property ability of having optimized liquid rubber composite node.

Description

Liquid rubber composite node with outer groove flow channel

Technical Field

The utility model relates to a liquid rubber composite node especially relates to a liquid rubber composite node with outer groove runner.

Background

According to the dynamic requirement, when the rotating arm node is in linear high-speed operation (high-frequency vibration), larger radial rigidity is provided to ensure the operation stability, and the critical speed is improved; when passing a curve (low frequency and large amplitude), smaller rigidity performance is provided to ensure the performance of passing the curve, and abrasion is reduced; the common node is difficult to realize the characteristics, and particularly for old lines, large abrasion of wheel rails and lines and high maintenance cost, a new product is required to be used, and the liquid rubber composite node with the characteristics is also required to be used.

The liquid rubber composite rotating arm node working principle is as follows: two hollow cavity structures are designed in the rubber part, the two cavities are communicated through a flow passage design, and a sealed incompressible (viscous) liquid is filled in a cavity in advance. Under the action of load, the volumes in the two cavities change, and liquid flows between the two cavities to generate damping, so that vibration energy is consumed, and the aim of damping vibration is fulfilled. During low-frequency vibration, liquid flows up and down through the channel to play a role in large damping, liquid in a high-frequency section cannot flow in time, the damping value is small, vibration is effectively isolated, dynamic stiffness under high-frequency vibration is basically stable and unchanged, and the function of preventing dynamic hardening is played. The frequency ratio of the system is basically kept unchanged, and a good vibration reduction effect is still achieved.

Through search, the related domestic patent documents are found as follows:

1. the invention discloses a dynamic stiffness adjusting method for a rubber joint with liquid damping, which is disclosed in Chinese patent with publication number CN102644693A, publication date 2012, 8 and 22.

2. The Chinese invention patent with the publication number of CN105501242A and the publication date of 2016, 4 and 20 discloses a rubber node, which comprises the following components: the core shaft, 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 with the mandrel, a first communicating channel for connecting 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 utility model discloses a chinese utility model patent of bulletin number is CN204845947U, and bulletin date is 2015 year 12 months 9 days discloses an axle box node, and it includes a dabber, an elasticity external member, a casing, a run through is seted up at the middle part of dabber the through-hole of dabber, the elasticity external member cover is located the outer wall of dabber, first cavity, a second cavity have on the elasticity external member, the bottom of first cavity the bottom of second cavity respectively with the both ends intercommunication of through-hole forms a cavity body, the cavity is internal to have liquid, the casing cover is located the outside of elasticity external member.

4. The invention discloses a variable-rigidity rotating arm node which is disclosed by Chinese patent with the publication number of CN109455191A and the publication date of 2019, 3 and 12.A mandrel is wound on the surface of the mandrel, the main spring is vulcanized into a whole by two parts of rubber and a metal part, the metal part of the main spring is pressed and installed with the mandrel, the auxiliary spring is pressed and installed at two ends of the main spring, the auxiliary spring is also vulcanized into a whole by two parts of rubber and the metal part corresponding to the main spring, the peripheries of the main spring and the auxiliary spring are pressed and installed with outer sleeves, the mandrel is taken as a symmetrical shaft, two oil cavities are arranged between the outer sleeves and the main spring, and the two oil cavities are respectively communicated with two ports of the corresponding oil pipelines.

In order to further optimize the performance of the liquid rubber composite node, the product is required to provide larger axial rigidity and realize larger dynamic-static ratio, so that the existing liquid rubber composite node in the patent document is difficult to realize.

In summary, it is urgently needed to design a novel liquid rubber composite node, so that the novel liquid rubber composite node can provide smaller radial rigidity and larger axial rigidity, and larger dynamic-static ratio is realized, thereby optimizing the product performance of the liquid rubber composite node.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to the defect that exists among the prior art, provide a liquid rubber composite node with outer groove runner, it can provide less radial stiffness and great axial stiffness, realizes great sound to compare to the product property ability of liquid rubber composite node has been optimized.

In order to solve the technical problem, the utility model discloses the technical scheme who takes does: the utility model provides a compound node of liquid rubber with outer groove runner, includes overcoat, dabber and well spacer sleeve, and well spacer sleeve passes through rubber vulcanization bonding with the dabber and is in the same place, and well spacer sleeve assembles in the overcoat, is provided with the outer groove runner in the overcoat, still is provided with a plurality of spaces on well spacer sleeve, after the vulcanization, utilize rubber with a plurality of spaces form a plurality of liquid cavities of mutual independence, are provided with in a plurality of liquid cavities and are linked together through the outer groove runner between a plurality of liquid cavities.

Preferably, the outer sleeve comprises an inner outer sleeve and an outer sleeve, the inner outer sleeve is a flow channel outer sleeve, the outer sleeve is an integral outer sleeve, flow channel grooves are formed in the outer peripheral surface of the flow channel outer sleeve in a surrounding mode and distributed on the outer peripheral surface of the flow channel outer sleeve, the integral outer sleeve is sleeved on the flow channel outer sleeve, and the inner peripheral surface of the integral outer sleeve is used for shielding and sealing notches of the flow channel grooves to form an outer groove flow channel; the bottom of the flow channel groove is provided with a first flow channel through hole, the bottom of the flow channel groove is provided with a second flow channel through hole, the first flow channel through hole is communicated with one liquid cavity and the second flow channel through hole is communicated with the other liquid cavity, and therefore the liquid cavities are communicated through the outer groove flow channel.

Preferably, a plurality of spaces are arranged on the middle spacer sleeve, the spaces are similar to through holes, and the outer side end and the inner side end of each space are open; and sealing the end port of the inner side of each space by vulcanized rubber, and sealing the end port of the outer side of each space by using an arc-shaped cover plate, so that each space forms a liquid cavity.

Preferably, a projection or protruding towards the mandrel is arranged on the inner arc surface of the arc cover plate

Providing a mandrel projection or

And a rubber bump protruding towards the arc-shaped cover plate is arranged on the rubber covering the peripheral surface of the mandrel in the liquid cavity.

Preferably, the middle spacer bush is an integral spacer bush or a multi-petal spacer bush, the number of the liquid cavities is two, and the two liquid cavities are symmetrically distributed on the middle spacer bush relative to the axis of the middle spacer bush.

Preferably, when the intermediate spacer sleeve is a multi-petal spacer sleeve, before assembly, a gap E is left between the end faces of the two ends, close to each other, of each adjacent petal body.

Preferably, before assembly, an opening gap F is also left in the rubber at each gap E.

Preferably, when the middle spacer sleeve adopts the multi-petal spacer sleeve, a non-equal design is adopted, namely the center point of the middle spacer sleeve is taken as a circular point, and the circle center angles corresponding to the arc-shaped petal bodies are unequal; the circle center angle corresponding to the hollowed arc-shaped petal body is larger than the circle center angle corresponding to the non-hollowed arc-shaped petal body.

Preferably, the circle center angle corresponding to the arc-shaped hollowed petal body is 120 degrees, and the circle center angle corresponding to the arc-shaped non-hollowed petal body is 60 degrees.

The beneficial effects of the utility model reside in that: the utility model discloses a rubber after hollowing out and vulcanizing forms a plurality of independent liquid cavities that can store liquid on the intermediate spacer, sets up the outer groove runner again in the overcoat, utilizes the outer groove runner to feed through a plurality of liquid cavities and forms liquid rubber composite node, can provide less radial stiffness and great axial stiffness like this, realizes great sound to compare to the product property ability of liquid rubber composite node has been optimized. Through the design of forming the structure to the outer tank runner, firstly, be convenient for assemble, secondly guaranteed that liquid can only flow along the runner groove route that has designed in the outer tank runner, can not take place the cross flow phenomenon, further improved the reliability of product. Through the design of the specific forming structure of the liquid cavity, the liquid cavity can be smoothly formed, and the product quality is ensured. When the middle spacer sleeve is designed into the multi-petal spacer sleeve, through the design of the assembling structure and the process, after the interference assembly is finished, the end faces of the two ends, close to each other, of each adjacent petal body are in direct contact, rubber cannot be involved, and the performance of the assembled product can be further improved. When the middle spacer bush is designed into the multi-petal spacer bush, the middle spacer bush adopts the non-equal design, and the volume space of the liquid cavity is enlarged as much as possible. And dividing the rubber between the middle spacer sleeves into middle section rubber and end part rubber, and adjusting the radial rigidity and the axial rigidity of the node by adjusting the radial thickness of the middle section rubber and the axial thickness of the end part rubber.

Drawings

Fig. 1 is a schematic structural view of a node section along the radial direction of a mandrel in embodiment 1 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 front view of the flow channel jacket in embodiment 1 of the present invention;

FIG. 4 is an enlarged view of the portion B of FIG. 1;

FIG. 5 is an enlarged view of the portion C of FIG. 2;

fig. 6 is a schematic sectional view of the middle spacer sleeve in the radial direction of the mandrel according to embodiment 1 of the present invention;

FIG. 7 is an enlarged view of the portion D in FIG. 1;

FIG. 8 is an enlarged view of the intermediate spacer sleeve at section D of FIG. 1, when the intermediate spacer sleeve is not assembled into the outer sleeve;

FIG. 9 is a schematic view of a portion of the structure of FIG. 1 at the upper fluid cavity;

FIG. 10 is an enlarged view of section I of FIG. 3;

fig. 11 is a schematic partial sectional structural view of a node which is cut along the radial direction of the mandrel and is located at the upper liquid cavity in embodiment 2 of the present invention;

fig. 12 is a schematic partial sectional structural view of a node which is cut along the axial direction of the mandrel and located at the upper liquid cavity in embodiment 2 of the present invention;

fig. 13 is a schematic partial sectional structural view of a node which is cut along the radial direction of the mandrel and located at the upper liquid cavity in embodiment 3 of the present invention;

fig. 14 is a partial structural view of an end portion of a flow channel groove according to embodiment 4 of the present invention;

fig. 15 is a partial structural view of an end portion of a flow channel groove according to embodiment 5 of the present invention;

fig. 16 is a schematic view of a partial sectional structure of a node cut along the axial direction of the mandrel and located at an end of one end of the integral sheath in embodiment 6 of the present invention;

in the figure: 1. the flow channel comprises an outer sleeve, 111, a flow channel outer sleeve, 112, an integral outer sleeve, 1121, an outer sleeve flanging part, 2, a mandrel, 211, a mandrel convex block, 3, a middle spacer sleeve, 311, a left arc-shaped petal body, 312, a right arc-shaped petal body, 313, an upper arc-shaped petal body, 314, a lower arc-shaped petal body, 4, rubber, 411, a rubber block, 412, middle section rubber, 413, end rubber, 414, a rubber convex block, 5, a liquid cavity, 6, a flow channel groove, 611, a horizontal flow channel groove, 612, a vertical flow channel groove, 613, a closing-in flow channel groove I, 614, a closing-in flow channel groove II, 615, a closing-in flow channel groove III, 7, a flow channel through hole I, 8, a flow channel through hole II, 9, an arc-shaped cover plate, 911, a cover plate through hole, 912, a convex block, 10, a step part, 11, 14. step two, 15, end seal ring.

Detailed Description

The technical solution of the present invention will be further elaborated with reference to the accompanying drawings and specific embodiments.

Example 1: as shown in fig. 1 and 2, a liquid rubber composite node with an outer groove flow channel comprises an outer sleeve 1, a mandrel 2 and an intermediate spacer 3, wherein the intermediate spacer 3 and the mandrel 2 are vulcanized and bonded together through rubber 4, the intermediate spacer 3 is assembled in the outer sleeve 1, the outer groove flow channel is arranged in the outer sleeve 1, a plurality of spaces are further arranged on the intermediate spacer 3, after vulcanization, a plurality of mutually independent liquid cavities 5 are formed by the rubber 4 and the spaces, liquid (not shown in the figure) is arranged in the liquid cavities 5, and the liquid cavities 5 are communicated through the outer groove flow channel. The liquid rubber composite node formed by the structure can provide smaller radial rigidity and larger axial rigidity, and realizes larger dynamic-static ratio, thereby optimizing the product performance of the liquid rubber composite node.

The data obtained by the applicant by subjecting several samples to the test are as follows:

	radial stiffness	Axial stiffness	Dynamic-static ratio
				Sample No. 1	5.68	13.16	6.5：1
Sample No. 2	5.57	12.62	7：1
				Sample No. 3	5.54	12.38	6：1
Sample No. 4	5.34	13.02	6：1
				Sample No. 5	5.25	11.68	5：1

As shown in fig. 3 to 5, the outer tank flow passage is formed as follows: the outer jacket 1 is provided as an inner jacket and an outer jacket, the inner jacket is a flow channel jacket 111, the outer jacket is an integral jacket 112, the flow channel groove 6 is provided on the outer peripheral surface of the flow channel jacket 111, and the flow channel groove 6 is spirally distributed around the outer peripheral surface of the flow channel jacket 111, but the flow channel groove 6 may be provided in other shapes instead of spirally. The entire outer jacket 112 is fitted over the flow path outer jacket 111, and the inner peripheral surface of the entire outer jacket 112 shields and seals the notch of the flow path groove to form an outer groove flow path, so that the liquid can flow only in the spiral length direction of the spiral flow path groove 6. Because the runner groove is the heliciform and its notch is open state, consequently, for the effect that the spiral length direction that guarantees liquid and can only follow the heliciform runner groove flows, need seal the notch in runner groove, prevent to place liquid and transversely scurry the flow between the heliciform runner groove, this embodiment is when the assembly, the runner overcoat is through interference fit to whole overcoat, after interference fit, utilize the cohesion between runner overcoat and the outside overcoat, seal the notch in runner groove, make liquid can only flow along the spiral length direction in heliciform runner groove, and can not transversely scurry the flow between the heliciform runner groove, the reliability of product has further been improved.

In the present embodiment, as shown in fig. 1, 3 and 5, two liquid cavities are provided (an upper liquid cavity located at the upper side and a lower liquid cavity located at the lower side in fig. 1), and in operation, the two liquid cavities need to be communicated with each other to ensure that liquid can flow back and forth between the two liquid cavities. In the embodiment, a first flow passage through hole 7 is formed in the bottom of one end of the flow passage groove 6, a second flow passage through hole 8 is formed in the bottom of the other end of the flow passage groove 6, and the first flow passage through hole 7 is communicated with one liquid cavity 5 and the second flow passage through hole 8 is communicated with the other liquid cavity 5, so that the liquid cavities 5 are communicated with each other through an outer groove flow passage.

As shown in fig. 1 and 5, the liquid cavity is formed as follows: firstly, two spaces (such as spaces X1 and X2 in fig. 1) are dug out on the intermediate spacer 3, the spaces X1 and X2 are similar to through holes, the outer ends and the inner ends thereof are both open, here, one end of the space close to the mandrel 2 side is regarded as the inner end, and one end of the space far from the mandrel 2 side is regarded as the outer end, in order to ensure that the liquid cavity can store liquid, the openings at the two ends of each space need to be sealed so that each space can be formed independently, in the embodiment, when the openings at the inner ends of the spaces are sealed, the sealing is performed by using rubber 4, that is: after the mandrel 2 and the middle spacer sleeve 3 are vulcanized and bonded together through the rubber 4, the end port of the inner side of the space is sealed by the vulcanized rubber 4 through design; when the outer side end opening of the space is sealed, an arc-shaped cover plate 9 is additionally arranged on the hollowed middle spacer bush 3, and the outer side end opening of the space is blocked by the arc-shaped cover plate 9, so that each space forms an independent liquid cavity. The middle spacer 3 around the opening of the outer end of the space is provided with a step part 10, the step part 10 is arranged into a whole circle along the opening of the outer end of the space, the arc-shaped cover plate 9 covers the step part 10, and the step part 10 is used as a positioning structure to facilitate the positioning and assembly of the arc-shaped cover plate 9. In this embodiment, the mandrel, the outer sleeve, the intermediate spacer sleeve and the arc-shaped cover plate can all be made of metal materials.

The arc-shaped cover plate 9 is further provided with a cover plate through hole 911, the position of the cover plate through hole 911 arranged on the arc-shaped cover plate 9 is arranged according to the position of the flow passage through hole at the end part of the flow passage groove 6, namely, the arranged cover plate through hole 911 is communicated with the flow passage through hole, namely, the cover plate through hole 911 on the arc-shaped cover plate 9 on one liquid cavity is communicated with the first flow passage through hole 7 at one end part of the flow passage groove 6, and the cover plate through hole 911 on the arc-shaped cover plate 9 on the other liquid cavity is communicated with the second flow passage through hole 8 at the other end part of the flow passage groove 6. When the diameter of the cover plate through hole R1 is smaller than the diameter of the flow passage through hole R2, the projection area of the port of the cover plate through hole on the radial projection plane and the projection area of the port of the flow passage through hole on the radial projection plane can be completely or partially overlapped with each other, and therefore assembly is facilitated.

As shown in fig. 5, in order to further ensure the sealing performance of the outer end port of the space, it is also necessary to perform the sealing by matching in the manner of encapsulation and press-fitting, that is, in the present embodiment, the rubber is encapsulated on the step part 10, where the encapsulation thickness can be set according to the actual situation. During assembly, the mandrel 2 and the hollowed middle spacer sleeve 3 are vulcanized into a whole through rubber 4, the rubber is coated on the step part 10, the step part 10 is covered with the arc-shaped cover plate 9, the arc-shaped cover plate 9 is in contact with the coating on the step part 10, the middle spacer sleeve 3 with the arc-shaped cover plate 9 is assembled in the runner outer sleeve 111 in an interference fit mode, the arc-shaped cover plate 9 is pressed on the step part 10 through acting force generated after assembly, the coating on the step part 10 is deformed, a sealing effect is achieved, and finally the runner outer sleeve 111 is assembled in the integral outer sleeve 112 in an interference fit mode, and the sealing performance is further improved. When the integral outer sleeve 112 is assembled, a certain reducing amount can be further designed, and the sealing effect is further improved.

The outer peripheral surface of the arc-shaped cover plate 9 and the outer periphery of the cover plate through hole are also provided with a sealing groove, a sealing ring 11 is placed in the sealing groove, before interference assembly is not carried out, the height of the sealing ring 11 is higher than the groove depth of the sealing groove, after the interference assembly is carried out, the sealing groove is tightly filled with the sealing ring 11 by utilizing acting force, and a sealing structure is formed at the position.

The middle spacer sleeve can adopt an integral spacer sleeve or a multi-petal spacer sleeve. In this embodiment, what is used is a multi-petal spacer, such as a two-petal type, a three-petal type, etc., specifically, what is used in this embodiment is a four-petal spacer, as shown in fig. 6, the middle spacer 3 in this embodiment is a four-petal spacer, which includes a left arc petal body 311, a right arc petal body 312, an upper arc petal body 313 and a lower arc petal body 314, and the four petal bodies are circumferentially enclosed to form the spacer. As shown in fig. 8, before the interference assembly is performed after the spacer sleeve and the mandrel are bonded by rubber vulcanization, a gap E (e.g., 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) is left between the end surfaces of the two ends of each adjacent petal, and an opening gap F is also left 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 an acting force, the gap E and the adjacent opening gap F disappear, that is, the end faces of the two ends of each petal body close to each other contact 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 the present embodiment, the opening gap F is a U-shaped groove, the opening of the U-shaped groove faces the gap E, and two side edges of the U-shaped groove respectively coincide with two end faces of two adjacent lobes located at the gap E along the extension line of the radial extension of the middle spacer, and the depth of the U-shaped groove is designed according to the actual assembly condition. After the assembly can be guaranteed by arranging the opening gap F, the two end faces, close to each other, of each petal body are in direct contact with each other, and no rubber is involved between the petal bodies.

In the design of the multi-petal type middle spacer sleeve, an equal division design can be adopted, and an unequal division design can also be adopted, in the embodiment, the unequal division design is adopted, namely the central point of the middle spacer sleeve is taken as a circular point, the corresponding circle center angles of the arc petals are unequal, as shown in fig. 6, the radian of the upper arc petal body 313 and the corresponding circle center angle of the lower arc petal body 314 are respectively set to be α, the circle center angles of the left arc petal body 311 and the right arc petal body 312 are respectively set to be β, and α > β.

The hollowed petals can be any petals in the multi-petal type middle spacer sleeve, and in the embodiment, the liquid cavity is formed by hollowing the radian of the upper arc-shaped petals 313 and the lower arc-shaped petals 314 which are symmetrically arranged in the axial direction of the mandrel 2.

In order to enable the liquid rubber to provide the nonlinear rigidity characteristic, the design scheme of a matching structure between the metal cover and the mandrel is adopted. The following is a detailed description of example 1, example 2 and example 3, respectively. In the embodiment 1, as shown in fig. 9, a bump 912 protruding toward the mandrel 2 is provided on the inner arc surface of the arc-shaped cover plate 9, and in operation, when the node is subjected to a load, the bump 912 contacts with the rubber covering the outer circumferential surface of the mandrel 2 to provide a non-linear stiffness characteristic, and under further action of the load, the bump 912 indirectly contacts with the mandrel 2 to form a hard stop limit protection function. In this embodiment, the rubber contacting the bump 912 is specifically configured as a convex rubber block 411, the shape and size of the rubber block 411 are matched with the shape and size of the bump 912, the protruding direction of the rubber block 411 and the protruding direction of the bump 912 are in a mutually protruding state, the surfaces of the rubber block 411 contacting the bump 912 are both configured as arc surfaces, and since the rubber block 411 and the bump 912 are matched with each other, the contact surface of the bump 912 is an inward arc surface, and the contact surface of the rubber block 411 is an outward arc surface. Under the action of load, a gap L between the bump 912 and the rubber block 411 gradually disappears, after the gap L disappears, the bump 912 and the rubber block 411 are in contact with each other, a node starts to provide a nonlinear rigidity characteristic, and at the moment, the bump 912 and the rubber block 411 are in contact with each other, so that a buffer effect can be provided through the rubber block 411, and hard contact is avoided. Therefore, the nonlinear stiffness curve can be adjusted by adjusting the size of the gap L. In this embodiment, the two arc cover plates 9 are provided with protrusions 912 on their inner arc surfaces, the corresponding protruding rubber blocks 411 are provided on the outer circumference of the mandrel 2 corresponding to the two protrusions 912, one protrusion 912 and its corresponding rubber block 411 and the other protrusion 912 and its corresponding other rubber block 411 are respectively located in the two liquid cavities 5.

It should be noted here that the volume of the liquid cavity is also influenced by the above-mentioned design of the arc-shaped cover plate 9 and its projection 912 and by the design of the rubber block 411. In this embodiment, in the radial section (as shown in fig. 1) and in the axial section (as shown in fig. 2) of the mandrel, the liquid cavity is dumbbell-shaped, and the volumes of the cavities at the two ends of the dumbbell-shaped liquid cavity are larger, so that the volume of the liquid cavity in this embodiment is larger, and more liquid can be contained.

As shown in fig. 2, the mandrel 2 is formed as a single mandrel having a central axis N of the mandrel 2 as a generatrix, high at both ends, and a saddle-shaped surface G at the middle bottom as a rotation surface. The mandrel is arranged such that the rubber 4 between the mandrel and the intermediate spacer is divided into two parts, one part is the intermediate section rubber 412, the other part is the end rubber 413 located at both ends of the intermediate section rubber 412, the thickness of the intermediate section rubber 412 in the radial direction of the mandrel is set to the radial thickness H1, and the thickness of the end rubber 413 in the axial direction of the mandrel is set to the axial thickness H2. In operation, the middle section rubber 412 provides primarily radial stiffness and the end 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 the axial thickness H2.

The mandrel 2 is also provided with an injection hole 12, the injection hole 12 is communicated with the liquid cavity 5, and liquid is injected into the liquid cavity 5 through the injection hole 12 at the beginning and then is sealed.

This application has also made the design to the both ends tip shape of runner groove 6 on the outer peripheral face of runner overcoat 111, and this application has designed three kinds of runner groove end structures of right angle type tip, bracing line type tip and binding off type tip altogether, through the design to runner groove end mouth, can adjust the dynamic stiffness of node. It should be noted that, because the runner groove 6 has two end portions, the above-mentioned three kinds of runner groove end portions structures can be designed to the two end portions of the runner groove 6 in a matching manner, and it is not necessary that the two end portions of the runner groove 6 all adopt the same end portion structure, for example, the two end portions of the runner groove 6 can both adopt a right-angle end portion structure, or the one end portion of the runner groove 6 can adopt a right-angle end portion structure, and the other end portion adopts a closed end portion, etc., and the description is not repeated herein.

The following is set forth in example 1, example 4 and example 5, respectively.

In the present embodiment 1, as shown in fig. 10, the flow channel groove of the present embodiment employs a right-angled end portion. The middle part of the spiral runner groove 6 is in a mutually parallel inclined arrangement state, and when the spiral runner groove 6 extends to the end parts of the two ends, the spiral runner groove is gradually straightened, and then when the spiral runner groove reaches the end parts, the spiral runner groove turns at a right angle of 90 degrees to extend and terminate. One end of this type of flow channel groove includes a horizontal flow channel groove 611 and a vertical flow channel groove 612 which are communicated with each other, one end of the horizontal flow channel groove 611 is communicated with one end of the vertical flow channel groove 612, a flow channel through hole one 7 is opened on the bottom of the other end of the horizontal flow channel groove 611, and the other end of the vertical flow channel groove 612 is communicated with the middle flow channel groove of the spiral flow channel groove 6. The other end of the flow channel groove of this type also includes a horizontal flow channel groove and a vertical flow channel groove which are communicated with each other, and the second flow channel through hole is formed in the horizontal flow channel groove at the other end of the flow channel groove, which will not be described in detail herein. The horizontal channel groove 611 has a groove width J1 equal to the groove width J2 of the vertical channel groove 612. The node adopting the right-angle end runner groove can provide the maximum dynamic stiffness, and the frequency lifting inflection point is generally in the range of 6-7 Hz.

Example 2: as shown in fig. 11, the difference from embodiment 1 is that: in order to provide the liquid rubber with the nonlinear stiffness characteristic, the following scheme is adopted in the embodiment: in this embodiment, no protrusion is provided on the inner arc surface of the arc cover plate 9, but a mandrel protrusion 211 is provided on the mandrel 2, and the rubber 4 is formed to cover the mandrel 2 and the mandrel protrusion 211. Under the action of load, the arc-shaped cover plate 9 is firstly contacted with the rubber 4 positioned in the liquid cavity, the node starts to provide the nonlinear rigidity characteristic, and under the further action of load, the arc-shaped cover plate 9 is indirectly contacted with the mandrel lug 211 to form the hard stop limit protection function. In the present embodiment, there are corresponding protruded mandrel protrusions 211 on the outer peripheral surface of the mandrel 2 corresponding to the two arc-shaped cover plates 9, and the two mandrel protrusions 211 are respectively located in the two liquid cavities 5.

The volume of the liquid cavity in this embodiment is different from that in embodiment 1, and the liquid cavity in this embodiment is a small-volume liquid cavity. In this embodiment, the liquid cavity is dumbbell-shaped in a radial section (see fig. 11) along the mandrel, the cavity volume at both ends of the dumbbell-shaped liquid cavity is small, and the rubber 4 in the liquid cavity has the arc-shaped convex part 12 in an axial section (see fig. 12) along the mandrel, which further reduces the volume of the liquid cavity. And the node of the small-volume liquid cavity can provide larger dynamic rigidity characteristic under the same rigidity.

Example 3: as shown in fig. 13, the difference from embodiment 1 is that: in order to provide the liquid rubber with the nonlinear stiffness characteristic, the following scheme is adopted in the embodiment: in the present embodiment, no bump is provided on the arc cover plate 9 and the mandrel 2, only the rubber 4 which is positioned in the liquid cavity and covers the outer peripheral surface of the mandrel 2 is provided with the rubber bump 414 which protrudes towards the arc cover plate 9, when the arc cover plate 9 is used to contact with the rubber bump 414, the node starts to provide the nonlinear stiffness characteristic, but in the present embodiment, the node has no hard stop limit protection function. In the present embodiment, two rubber bumps 414 are respectively located in the two liquid cavities 5.

Example 4: this embodiment mainly explains another structure of the end portion of the runner duct, as shown in fig. 14, which is different from embodiment 1 in that: the runner duct of the present embodiment employs a diagonal end portion. The dynamic stiffness provided by the node adopting the oblique end runner groove is smaller than that provided by the node adopting the right-angle end runner groove, and the frequency lifting inflection point is generally within the range of 2-4 Hz.

Example 5: this embodiment mainly explains another structure of the end portion of the runner duct, as shown in fig. 15, which is different from embodiment 1 in that: the runner duct of the present embodiment employs a closed end. One end of the flow channel groove of the type comprises a closing-in flow channel groove I613, a closing-in flow channel groove II 614 and a closing-in flow channel groove III 615 which are sequentially communicated, a flow channel through hole I7 is formed in the closing-in flow channel groove I613, and the closing-in flow channel groove III 615 is communicated with a middle flow channel groove of the spiral flow channel groove 6. The other end of the flow channel groove of this type also includes a closing-in flow channel groove one 613, a closing-in flow channel groove two 614 and a closing-in flow channel groove three 615 which are communicated in sequence, and the flow channel through hole two is opened in the closing-in flow channel groove one 613 at the other end of the flow channel groove, which will not be described in detail herein.

The groove width J3 of the closing-in runner groove I613 is larger than the groove width J4 of the closing-in runner groove II 614, the groove width J5 of the closing-in runner groove III 615 is larger than the groove width J4 of the closing-in runner groove II 614, the two ends of the end part of the runner groove are large, the middle part of the runner groove is small to form a closing-in shape, the dynamic stiffness provided by the node of the closing-in type end runner groove is moderate, namely the frequency lifting inflection point is generally within the range of 2-4Hz between the dynamic stiffness provided by the node of the oblique line type end runner groove and the dynamic stiffness provided by the node of the right angle type end runner groove.

The applicant carried out tests on samples having three types of runner channel end configurations as follows:

right angle type end	Dynamic stiffness	Frequency lifting inflection point
			Sample No. 1	56	7Hz

End of oblique line type	Dynamic stiffness	Frequency lifting inflection point
			Sample No. 1	32	3Hz

Closed end	Dynamic stiffness	Frequency lifting inflection point
			Sample No. 1	40	3Hz

Example 6: as shown in fig. 16, the present embodiment is different from embodiment 1 in that: the two ends of the integral sheath 112 in this embodiment are of a flanging and crimping design. One end of the middle spacer sleeve 3 is provided with a first continuous step part 13 and a second continuous step part 14, the first step part 13 is located at the lower position (close to the position of the mandrel), the second step part 14 is located at the upper position (far away from the position of the mandrel), one end face of the flow channel outer sleeve 111 is flush with the lateral vertical surface of the second step part 14 in the vertical direction, the second step part 14 is provided with an end sealing ring 15, when flanging and buckling are not performed, the height of the end sealing ring 15 is higher than that of the second step part 14, namely, the end sealing ring 15 is located between the second step part 14 and the flow channel outer sleeve 111. An outer sleeve flanging part 1121 is arranged on one end face of the integral outer sleeve 112 in an extending mode, when flanging is conducted, the outer sleeve flanging part 1121 is used for flanging and bending to press the end sealing ring 15 tightly, the end sealing ring 15 is used for sealing an end gap P of a contact surface between the flow channel outer sleeve 111 and the middle spacing sleeve 3, and the sealing performance of the node is further improved. The outer sleeve flanging part 1121 is flanged to the lateral vertical surface of the first step part 13, so that flanging operation is performed by the first step part 13 for flanging positioning. After the flanging operation, a gap T is left between the end of the outer sleeve flanging part 1121 and the horizontal bottom surface of the first step part 13.

The other end of the middle spacer 3 is also provided with a continuous step part I and a continuous step part II, the other end face of the integral outer sleeve is also provided with an outer sleeve flanging part in an extending way, and the flanging buckling and pressing design structure at the other end of the middle spacer is the same as the flanging buckling and pressing design structure at one end of the middle spacer, so the description is not repeated.

To sum up, the utility model discloses a rubber after hollowing out and vulcanizing forms a plurality of independent liquid cavities that can store liquid on the intermediate spacer, sets up the outer groove runner again in the overcoat, utilizes the outer groove runner to communicate a plurality of liquid cavities and forms the compound node of liquid rubber, can provide less radial stiffness and great axial stiffness like this, realizes great sound to compare to the product property ability of having optimized the compound node of liquid rubber. Through the design of forming the structure to the outer tank runner, firstly, be convenient for assemble, secondly guaranteed that liquid can only flow along the runner groove route that has designed in the outer tank runner, can not take place the cross flow phenomenon, further improved the reliability of product. Through the design of the specific forming structure of the liquid cavity, the liquid cavity can be smoothly formed, and the product quality is ensured. When the middle spacer sleeve is designed into the multi-petal spacer sleeve, through the design of the assembling structure and the process, after the interference assembly is finished, the end faces of the two ends, close to each other, of each adjacent petal body are in direct contact, rubber cannot be involved, and the performance of the assembled product can be further improved. When the middle spacer bush is designed into the multi-petal spacer bush, the middle spacer bush adopts the non-equal design, and the volume space of the liquid cavity is enlarged as much as possible. And dividing the rubber between the middle spacer sleeves into middle section rubber and end part rubber, and adjusting the radial rigidity and the axial rigidity of the node by adjusting the radial thickness of the middle section rubber and the axial thickness of the end part rubber.

The term "plurality" as used in this embodiment means a number of "two or more". The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, so all equivalent technical solutions should also belong to the protection scope of the present invention, and the protection scope of the present invention should be defined by the claims.

Claims

1. The utility model provides a compound node of liquid rubber with outer groove runner, includes overcoat, dabber and well spacer sleeve, and well spacer sleeve bonds together through rubber vulcanization with the dabber, and in the overcoat was assembled to well spacer sleeve, its characterized in that: the outer sleeve is provided with an outer groove flow channel, the middle spacer sleeve is also provided with a plurality of spaces, after vulcanization, a plurality of mutually independent liquid cavities are formed by rubber and the spaces, liquid is arranged in the liquid cavities, and the liquid cavities are communicated through the outer groove flow channel.

2. The liquid rubber composite node of claim 1, wherein: the outer sleeve comprises an inner outer sleeve and an outer sleeve, the inner outer sleeve is a flow channel outer sleeve, the outer sleeve is an integral outer sleeve, flow channel grooves are formed in the outer peripheral surface of the flow channel outer sleeve in a surrounding mode and distributed on the outer peripheral surface of the flow channel outer sleeve, the integral outer sleeve is sleeved on the flow channel outer sleeve, and the inner peripheral surface of the integral outer sleeve is used for shielding and sealing the notch of the flow channel grooves to form an outer groove flow channel; the bottom of the flow channel groove is provided with a first flow channel through hole, the bottom of the flow channel groove is provided with a second flow channel through hole, the first flow channel through hole is communicated with one liquid cavity and the second flow channel through hole is communicated with the other liquid cavity, and therefore the liquid cavities are communicated through the outer groove flow channel.

3. The liquid rubber composite node of claim 2, wherein: a plurality of spaces are arranged on the middle spacer sleeve, the spaces are similar to through holes, and the outer side end and the inner side end of each space are open; and sealing the end port of the inner side of each space by vulcanized rubber, and sealing the end port of the outer side of each space by using an arc-shaped cover plate, so that each space forms a liquid cavity.

4. The liquid rubber composite node of claim 3, wherein: a convex block protruding towards the mandrel is arranged on the inner arc surface of the arc cover plate

Providing a mandrel projection or

5. The liquid rubber composite node according to any one of claims 1 to 4, wherein: the middle spacer sleeve adopts an integral spacer sleeve or a multi-petal spacer sleeve, the number of the liquid cavities is two, and the two liquid cavities are symmetrically distributed on the middle spacer sleeve about the axis of the middle spacer sleeve.

6. The liquid rubber composite node of claim 5, wherein: when the middle spacer sleeve adopts the multi-petal spacer sleeve, before assembly, a gap E is reserved between the end faces of the two ends, close to each other, of each adjacent petal body.

7. The liquid rubber composite node of claim 6, wherein: before assembly, an opening gap F also remains in the rubber at each gap E.

8. The liquid rubber composite node of claim 5, wherein: when the middle spacer sleeve adopts the multi-petal spacer sleeve, a non-uniform design is adopted, namely the center point of the middle spacer sleeve is taken as a circular point, and the circle center angles corresponding to the arc-shaped petals are unequal; the circle center angle corresponding to the hollowed arc-shaped petal body is larger than the circle center angle corresponding to the non-hollowed arc-shaped petal body.

9. The liquid rubber composite node of claim 8, wherein: the circle center angle corresponding to the hollowed arc-shaped petal body is 120 degrees, and the circle center angle corresponding to the non-hollowed arc-shaped petal body is 60 degrees.