CN221401486U - Hydraulic bushing for reinforcing radial rigidity - Google Patents

Abstract

The utility model discloses a hydraulic bushing for reinforcing radial rigidity, which comprises a bushing inner pipe, a bushing outer pipe, a vulcanized rubber body, a supporting framework and a plastic stop block, wherein the supporting framework, the vulcanized rubber body and the bushing outer pipe are coaxially arranged, the bushing inner pipe, the supporting framework and the bushing outer pipe are arranged in an eccentric way, two damping chambers which are communicated with each other are arranged on two sides of the vulcanized rubber body, namely a chamber A and a chamber B, the plastic stop block is eccentrically arranged in the damping chambers on two sides of the rubber body, the plastic stop block is contacted with the bushing outer pipe, a first bulge part is arranged between the two damping chambers, the first bulge part is correspondingly limited with a first groove on the plastic stop block, a second groove which is concave towards the center of the bushing inner pipe is arranged on the upper part and the lower part of the outer wall of the bushing inner pipe, a second bulge part matched with the second groove is arranged on the inner side of the vulcanized rubber body, and the two second bulge parts are distributed on the upper position and the lower position of the first bulge part. The structure improves the service life of the product.

Description

Hydraulic bushing for reinforcing radial rigidity

Technical Field

The utility model relates to the technical field of rubber bushings of vehicle chassis, in particular to a hydraulic bushing for reinforcing radial rigidity.

Background

Control arm hydraulic bushings for vehicle chassis, which are elastic elements arranged in the vehicle chassis suspension system and mainly functioning as coupling and vibration damping, are often required to transmit certain axial and radial loads. Compared with the traditional rubber metal bushing, the hydraulic bushing has high damping characteristic in a certain frequency range, so that the vibration damping performance of the bushing can be improved, and the running smoothness and the comfort of a vehicle are improved.

Whereas conventional structures such as the patent number: 201920931186.0, patent name: the hydraulic bushing has the advantages that the contact area between the inner pipe and the rubber layer is small, the runner plate is nested in the main spring, and the runner plate and the inner pipe are concentrically arranged, so that the axial and radial rigidity of the hydraulic bushing is low, the hydraulic bushing can possibly generate larger axial displacement under the working condition of larger axial load, the large axial displacement can cause large deformation and high stress of the rubber part, the durability of the bushing is poor, and the service life is short;

In addition, axial load of the hydraulic bushing of the control arm usually occurs by superposition of loads such as radial force, torsion and the like. While axial displacement is large and displacement in other directions is overlapped, interference between internal parts may occur, so that deformation or damage of parts is caused, therefore, in order to solve the problem of avoiding damage of parts, axial displacement of the bushing is usually limited by arranging rubber limiting blocks at two ends of the bushing, and the method requires hard limiting contact surfaces capable of covering the rubber limiting blocks at two axial ends of the bushing, and the contact surfaces can be a part of a frame or an additional flange plate and the like, but if the arrangement is used, the overall size of the bushing is definitely increased or the limitation of the arrangement space of the whole vehicle is easily caused, so that improvement is needed.

Disclosure of utility model

The utility model aims to provide a hydraulic bushing with reinforced radial rigidity, which solves the problems of poor durability, short service life, requirement for increasing the external dimension of the bushing in the later period and inconvenient installation of the bushing caused by lower axial and radial rigidity of the current bushing in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a reinforce radial rigidity hydraulic bushing, includes bush inner tube, bush outer tube, is located the vulcanization spare rubber body and the braced frame between bush inner tube and the bush outer tube, the vulcanization spare rubber body passes through braced frame setting in the bush inner tube outside, its characterized in that: still including the plastic dog that restriction vulcanization spare rubber body reciprocated, support skeleton, vulcanization spare rubber body and bush outer tube coaxial arrangement, bush inner tube and support skeleton, the off-axis arrangement of bush outer tube the both sides of vulcanization spare rubber body are provided with two damping cavities that circulate each other, are cavity A and cavity B respectively, and cavity A and cavity B are filled with damping liquid, plastic dog eccentric mounting is in the damping cavity of rubber body both sides, forms two different size cavities, just plastic dog with the bush outer tube contact, be provided with the passageway that supplies damping liquid to flow on the contact surface of plastic dog and the bush outer tube, this passageway intercommunication two damping cavities, the centre of two damping cavities all is provided with first bellying, first bellying with first recess on the plastic dog is corresponding to be spacing the upper and lower of bush inner tube outer wall all is provided with a second recess to bush inner tube indent the inboard of vulcanization spare body is provided with the second bellying, and two second bellying are located the upper and lower position of first bellying distribution.

Further, the plastic dog includes plastic outer connecting block, plastic internal connection piece and connects the rubber body, plastic outer connecting block and bush outer tube medial surface contact, connect the rubber body and contact with the first bellying of vulcanize rubber body, just connect the rubber body to be located between plastic outer connecting block, the plastic internal connection piece, and every connect the rubber body to be located between plastic outer connecting block, the plastic internal connection piece through the mode fixed connection of vulcanizing, the both ends of plastic outer connecting block are contacted with braced skeleton.

Further, the lining inner tube, the supporting framework and the vulcanized rubber body are connected together in a vulcanization bonding mode to form the vulcanized piece, and the lining outer tube is sleeved outside the vulcanized piece.

Further, the upper and lower parts of the two damping chambers are arc-shaped surfaces.

Further, a concave groove is formed in the upper portion and the lower portion of the outer wall of the plastic outer connecting block, a gap exists between the plastic outer connecting block and the bushing outer tube, the gap is communicated with the concave groove, the gap is communicated with the damping cavity, and damping liquid is filled in the gap and the concave groove.

Further, the front and back of the plastic inner connecting block are respectively provided with a blocking wing, the first groove is positioned between the two blocking wings, and a damping small chamber matched with the blocking wings is arranged in the damping chamber.

Compared with the prior art, the utility model has the beneficial effects that: the plastic stop block additionally arranged in the structure improves the overall radial and axial limiting effect, internal parts cannot be displaced at will, the later stage is free from being additionally limited, the integral installation is convenient, the axial limiting and radial buffering functions are realized, the maximum axial displacement of the bushing can be effectively limited, and the plastic stop block is eccentrically arranged, so that the hydraulic bushing with the same structural form can adapt to more different performance requirements and can cover more vehicle types; further improving the service life of the product.

Drawings

FIG. 1 is a top view of a reinforced radial stiffness hydraulic bushing of example 1;

FIG. 2 is a schematic longitudinal cross-sectional view of a hydraulic bushing with enhanced radial stiffness according to example 1;

FIG. 3 is a schematic cross-sectional view of a hydraulic bushing with enhanced radial stiffness according to example 1;

Fig. 4 is a schematic diagram showing an assembly structure of a hydraulic bushing for reinforcing radial stiffness and a chassis suspension system of a vehicle in embodiment 1.

In the figure: the novel plastic damper comprises a bushing outer tube 1, a bushing inner tube 2, a second groove 2-1, a supporting framework 3, a plastic outer connecting block 4, a concave groove 4-1, a gap 4-2, a connecting rubber body 5, a plastic inner connecting block 6, a blocking wing 6-1, a damping chamber 7, a first protruding part 7-1, an arc-shaped surface 7-2, a damping small chamber 7-3, a vulcanized part rubber body 8, a second protruding part 8-1, a first groove 9 and a plastic stop block 10.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

Referring to fig. 1-3, the hydraulic bushing for reinforcing radial rigidity provided in this embodiment includes a bushing inner tube 2, a bushing outer tube 1, a vulcanized rubber body 8 located between the bushing inner tube 2 and the bushing outer tube 1, and a supporting framework 3, where the vulcanized rubber body 8 is disposed outside the bushing inner tube 2 through the supporting framework 3, and is characterized in that: the rubber stopper 10 limiting the up-and-down movement of the vulcanized rubber body 8 is further arranged coaxially with the supporting framework 3, the vulcanized rubber body 8 and the bushing outer tube 1, the bushing inner tube 2, the supporting framework 3 and the bushing outer tube 1 are arranged in an eccentric way, two damping chambers 7 which circulate mutually are arranged on two sides of the vulcanized rubber body 8 and are respectively a chamber A and a chamber B, damping liquid is filled in the chamber A and the chamber B, the plastic stopper 10 is eccentrically arranged in the damping chambers 7 on two sides of the rubber body to form two chambers with different sizes, the plastic stopper 10 is in contact with the bushing outer tube 1, a channel for the flow of the damping liquid is arranged on the contact surface of the plastic stopper 10 and the bushing outer tube 1, the channel is communicated with the two damping chambers 7, first protruding parts 7-1 are respectively arranged in the middle of the two damping chambers 7-1, the first protruding parts 7-1 and the first grooves 9 on the plastic stopper 10 are correspondingly limited, second grooves 2-1 which are concave towards the inner side of the bushing inner tube 2 are respectively arranged on the upper and lower sides of the outer wall of the bushing inner tube 2, and the second protruding parts 2-8-respectively are respectively arranged on the two protruding parts 1-8, and the second protruding parts 2-1-8 are respectively arranged on the two protruding parts and are respectively arranged on the protruding parts 1-1.

Further, the plastic stopper 10 includes a plastic outer connection block 4, a plastic inner connection block 6 and a connection rubber body 5, the plastic outer connection block 4 contacts with the inner side of the bushing outer tube 1, the connection rubber body 5 contacts with the first protruding portion 7-1 of the vulcanized rubber body 8, the connection rubber body 5 is located between the plastic outer connection block 4 and the plastic inner connection block 6, each connection rubber body 5 is located between the plastic outer connection block 4 and the plastic inner connection block 6 and fixedly connected through vulcanization, and two ends of the plastic outer connection block 4 contact with the supporting framework 3.

Further, the lining inner tube 2, the supporting framework 3 and the vulcanized piece rubber body 8 are connected together in a vulcanization bonding mode to form a vulcanized piece, and the lining outer tube 1 is sleeved outside the vulcanized piece.

Further, both the upper and lower sides of the two damping chambers 7 are arc-shaped surfaces 7-2.

Further, a concave groove 4-1 is arranged on the upper portion and the lower portion of the outer wall of the plastic outer connecting block 4, a gap 4-2 is arranged between the plastic outer connecting block 4 and the bushing outer tube 1, the gap 4-2 is communicated with the concave groove 4-1, the gap 4-2 is communicated with the damping cavity 7, and damping liquid is filled in the gap 4-2 and the concave groove 4-1.

Further, a blocking wing 6-1 is disposed at the front and rear of the plastic inner connecting block 6, the first groove 9 is located between the two blocking wings 6-1, and a small damping chamber 7-3 matched with the blocking wing 6-1 is disposed in the damping chamber 7.

In general, the hydraulic bushing comprises a bushing outer tube 1 and a bushing inner tube 2 which are coaxially nested, a vulcanized member rubber body 8 is arranged between the bushing outer tube 1 and the bushing inner tube 2, two cavities are arranged in the vulcanized member rubber body 8, and viscous liquid such as glycol water solution is packaged in the two cavities and connected through an inertia channel. When there is a radial relative displacement between the inner and outer tubes of the hydraulic bushing, one of the cavities is compressed and the other cavity is stretched, and liquid flows through the inertia track. Friction between the viscous liquid and the inertial mass will produce a large damping effect, generally described by the damping angle.

When the structure is installed, the hydraulic bushing with reinforced radial rigidity disclosed by the embodiment is installed on a corresponding part of a vehicle chassis suspension system 11 according to the K direction shown in fig. 4, and the flow passage arranged on the contact surface of the outer side of the plastic stop block 10 and the bushing outer pipe 1 can be communicated with damping liquid (not marked in the figure) of a front cavity and a rear cavity, so that the structure is not specifically described, how to set up the flow passage for a person skilled in the art, the hydraulic bushing is in the prior art, and the structure is provided with an eccentric plastic stop block 10, the side edge of the plastic stop block 10 is propped against the bushing outer pipe 1 and the bushing inner pipe 2, the upper side and the lower side are propped against a supporting framework 3 to realize buffer limiting action on the axial direction and the radial direction of the bushing, when in operation, the damping cavity 7 on one side is extruded, damping liquid flows along the flow passage to the damping cavity 7 on the other side, and the damping liquid flows in the flow passage, meanwhile, when the cavity B is extruded, the cavity B is favorably absorbed, therefore, the rubber body 5 in the plastic stop block 10 is not interfered by the vulcanizing piece, the hydraulic bushing can have higher damping lag angle and peak value under specific frequency, thus the final service life of the rubber stop block is better, the service life of the rubber stop block is prolonged, compared with the axial shock resistance of the rubber stop block 2 is prolonged, the axial shock absorption of the rubber stop block is prolonged, the axial shock absorption is further increased, compared with the rubber stop block 10, the axial shock absorption is prolonged, the axial shock resistance is prolonged, compared with the rubber stop block 2 is prolonged, the shock resistance is prolonged, and the axial shock resistance is prolonged, and the service life is prolonged, with this life who improves whole product, the plastic dog 10 of setting up has improved whole radial and axial limiting displacement, and internals can not displace at will, need not in addition to carry out spacing in the later stage, make things convenient for integral erection, moreover this structure sets up eccentrically through changing plastic dog 10 shape, and later stage can change rubber hardness more actual conditions moreover, can finely tune hydraulic bushing's damping peak value frequency and static characteristic, so as to more accurately make hydraulic bushing provide great damping when a certain specific frequency, finally change radial rigidity curve change's degree of urgency, satisfy different performance requirements.

The hydraulic bushing in this embodiment has the following beneficial effects:

(1) The vehicle damping device has higher damping angle peak value in a set frequency range, can provide better damping performance and improves the travelling comfort of the vehicle;

(2) The axial and radial buffering limiting functions are realized, the axial maximum displacement can be effectively limited, the internal interference is avoided, and the durability of the product is improved;

(3) The plastic stopper 10 comprises a plastic outer connecting block 4, a plastic inner connecting block 6 and a connecting rubber body 5, wherein the plastic outer connecting block 4 and the plastic inner connecting block 6 are rigid, and the connecting rubber body 5 is soft, so that the plastic stopper has a radial limiting function, the radial limiting is divided into soft limiting and hard limiting, and the hard limiting is provided by a radial limiting acting surface of the plastic outer connecting block 4 and the supporting framework 3, so that the maximum radial displacement can be effectively limited; the soft limit is provided by the independent plastic stop block 10, so that the change of the radial stiffness curve is more gradual;

(4) The added plastic stop block 10 improves the overall radial and axial limiting effect, internal parts cannot be displaced randomly, and the limiting is not needed in the later period, so that the integral installation is convenient;

(5) And through setting up plastic dog 10 is eccentric, keeps the runner lax, can realize different radial rigidity curve change urgency degree, realizes different radial rigidity nonlinear characteristic, makes the hydraulic bushing of same structural style, can adapt to more different performance requirements, can cover more motorcycle types simultaneously, and two plastic dogs 10 of later stage also can design into different size, shape and hardness according to the requirement, satisfies the different performance requirements of vehicle when braking and accelerating.

It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration only and not for limitation of the invention, and that variations and modifications of the above described embodiments are intended to fall within the scope of the claims of the invention as long as they fall within the true spirit of the invention.

Claims (6)

1. The utility model provides a reinforce radial rigidity hydraulic bushing, includes bush inner tube (2), bush outer tube (1), is located vulcanized piece rubber body (8) and braced frame (3) between bush inner tube (2) and bush outer tube (1), vulcanized piece rubber body (8) set up in bush inner tube (2) outside, its characterized in that through braced frame (3): the rubber stopper (10) for limiting the up-and-down movement of the vulcanized part rubber body (8) is further included, the supporting framework (3), the vulcanized part rubber body (8) and the bushing outer tube (1) are coaxially arranged, the bushing inner tube (2) and the supporting framework (3) are arranged in a deflection mode, two damping chambers (7) which are communicated with each other are arranged on two sides of the vulcanized part rubber body (8), the chamber A and the chamber B are respectively provided with a chamber A and a chamber B, damping liquid is filled in the chambers A and the chamber B, the plastic stopper (10) is eccentrically arranged in the damping chambers (7) on two sides of the rubber body to form two chambers with different sizes, the plastic stopper (10) is in contact with the bushing outer tube (1), first protruding parts (7-1) are arranged in the middle of the two damping chambers (7) respectively, the first protruding parts (7-1) and first grooves (9) on the plastic stopper (10) are correspondingly limited, second grooves (2-1) which are concave towards the center of the inner tube (2) are arranged on the upper and lower sides of the outer wall of the bushing inner tube (2), the second protruding parts (8-1) are matched with the second protruding parts (8-1), the two second protruding parts (8-1) are distributed at the upper and lower positions of the first protruding part (7-1).

2. A reinforced radial stiffness hydraulic bushing according to claim 1, wherein: the plastic dog (10) include plastic outer connecting block (4), plastic internal connection piece (6) and connect rubber body (5), plastic outer connecting block (4) and bush outer tube (1) medial surface contact, connect rubber body (5) and vulcanize first bellying (7-1) of piece rubber body (8) and contact, just connect rubber body (5) to be located between plastic outer connecting block (4), plastic internal connection piece (6), and every connect rubber body (5) to be located between plastic outer connecting block (4), the plastic internal connection piece (6) through the mode fixed connection of vulcanization, the both ends of plastic outer connecting block (4) are contacted with braced skeleton (3).

3. A reinforced radial stiffness hydraulic bushing according to claim 2, wherein: the lining inner tube (2), the supporting framework (3) and the vulcanized piece rubber body (8) are connected together in a vulcanization bonding mode to form a vulcanized piece, and the lining outer tube (1) is sleeved outside the vulcanized piece.

4. A reinforced radial stiffness hydraulic bushing according to claim 3, wherein: the upper and lower parts of the two damping chambers (7) are arc-shaped surfaces (7-2).

5. A reinforced radial stiffness hydraulic bushing according to claim 4, wherein: the damping device is characterized in that a concave groove (4-1) is formed in the upper portion and the lower portion of the outer wall of the plastic outer connecting block (4), a gap (4-2) is formed between the plastic outer connecting block (4) and the bushing outer tube (1), the gap (4-2) is communicated with the concave groove (4-1), the gap (4-2) is communicated with the damping chamber (7), and damping liquid is filled in the gap (4-2) and the concave groove (4-1).

6. A reinforced radial stiffness hydraulic bushing according to claim 5, wherein: the plastic inner connecting block (6) is provided with a blocking wing (6-1) at the front and the back, the first groove (9) is positioned between the two blocking wings (6-1), and a small damping chamber (7-3) matched with the blocking wing (6-1) is arranged in the damping chamber (7).