CN210265649U - Flow passage body for hydraulic bushing - Google Patents

Abstract

The utility model provides a runner body for hydraulic bushing, the runner body constructs into sleeve form component be provided with the runner that is used for supplying hydraulic fluid from which to flow through that is formed by continuous recess on the surface of the runner body, a serial communication port, the runner body is made by the metal, and be provided with the rubber layer on the no recess region of the surface of the runner body.

Description

Flow passage body for hydraulic bushing

Technical Field

The utility model relates to a runner body for hydraulic bushing for vehicle.

Background

A hydraulic bushing is a part widely used in vehicles (e.g., automobiles and railway vehicles), and is mainly installed on a suspension or a bogie of a vehicle to absorb vibration and impact, thereby improving the stability and safety of the vehicle in running.

Chinese patent document CN108150536A discloses a hydraulic bushing. The hydraulic bushing comprises a core shaft, a runner body and an outer sleeve, wherein the runner body is sleeved on the outer side of the core shaft, and the outer sleeve is sleeved on the outer side of the runner body in a pressing mode. The gap between the mandrel and the flow channel body is filled with a rubber fluid, on the outer surface of which grooves are formed, preferably in the form of a helical circumferential distribution. The groove and the jacket thus together enclose a flow channel for the hydraulic fluid. Two liquid chambers for receiving liquid are formed on the rubber body in diametrically opposite positions, and are connected to one end of the flow channel so that they communicate with each other through the flow channel. The rigidity of the hydraulic bushing can be adjusted by the fluidity between the hydraulic fluid in the two fluid chambers, thereby achieving an improvement in the stability of the vehicle when running, particularly when the vehicle is turning.

In conventional hydraulic bushings, the runner body is typically made of a plastic material. However, such a runner body made of a plastic material is easily deformed by stress. Meanwhile, in the case of the plastic runner body, the cross flow and leakage of the hydraulic fluid are easily generated between the respective parallel runners. This results in the performance of the flow conduit body being greatly affected.

Therefore, it is desirable to provide a flow path body for a hydraulic bushing, which is less likely to deform and can avoid the channeling and leakage of hydraulic fluid.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel runner body for hydraulic pressure bush, it can make hydraulic pressure bush realize the function of becoming rigidity in radial or axial.

To this end, the present invention provides a flow channel body for a hydraulic bushing, the flow channel body being configured as a sleeve-shaped member, a flow channel formed by continuous grooves for hydraulic fluid to flow therethrough being provided on an outer surface of the flow channel body, characterized in that the flow channel body is made of metal, and a rubber layer is provided on a non-groove region of the outer surface of the flow channel body.

In a preferred embodiment, the rubber layer is vulcanized on the outer surface of the runner body in a vulcanization mode.

In a preferred embodiment, the thickness of said rubber layer is arranged to be in the range of 0.1mm-2 mm.

In a preferred embodiment, the metal is 16MnCr5, Q345E.

In a preferred embodiment, the grooves are distributed spirally on the circumference of the runner body to form the runner.

In a preferred embodiment, the helix angle of the helically distributed flow channels is set in the range of 1 ° to 42 °.

In a preferred embodiment, a pitch between the axially adjacent grooves forming the flow passage is set to not less than 3 mm.

In a preferred embodiment, the cross-sectional shape of the flow channel is configured as a rectangle, trapezoid or other geometric shape.

In a preferred embodiment, the cross-sectional area and length of the flow passage are determined based on the desired radial dynamic stiffness and damping coefficient of the hydraulic bushing.

In a preferred embodiment, both ends of the flow channel are provided with channel openings which radially penetrate through the side wall of the flow channel body.

Compared with the prior art, the utility model has the advantages of:

according to the utility model discloses an inner wall contact of the outer wall that is used for the runner body of hydraulic pressure bush and hydraulic pressure bush's overcoat, and be equipped with the rubber layer on the outer wall of the runner body to make the runner have good sealed effect, avoided the hydraulic fluid at the cross flow between adjacent runner section and leaked, greatly improved the performance of the runner body. The flow path body communicates the two main liquid chambers formed in the hydraulic bushing with each other through the flow path, so that hydraulic fluid can flow between the two main liquid chambers through the flow path. Therefore, the hydraulic bushing can realize the function of changing rigidity in the radial direction or the axial direction, and the vibration reduction effect of the hydraulic bushing is obviously improved.

Drawings

The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings. Wherein:

fig. 1 schematically shows the structure of a flow passage body according to an embodiment of the present invention.

Fig. 2 is a sectional view taken along line a-a in fig. 1.

Fig. 3 is an enlarged view of region B in fig. 2.

In the drawings, like parts are denoted by like reference numerals. The figures are not drawn to scale.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings. It should be noted that the terms "axial" and "radial" in this document refer to the horizontal and vertical directions in fig. 1, respectively.

Fig. 1 schematically shows a flow passage body 100 according to an embodiment of the invention. The flow channel body 100 can be used in particular in a hydraulic bushing. As an example, the hydraulic bushing may typically be a hydraulic bushing as disclosed in chinese patent document CN108150536A, which is incorporated herein by reference in its entirety.

As shown in fig. 1 and 2, the flow path body 100 is configured in a substantially sleeve shape and is installed in a casing of the hydraulic bushing in a press-fit manner. The flow conduit body 100 includes an outer surface 10 and an inner surface 20. In the assembled state, the outer surface 10 of the runner body 100 forms an interference fit with the inner surface of the outer sleeve of the hydraulic bushing. A continuous groove 15 is provided on the outer surface 10 of the flow channel body 100. The grooves 15 are distributed, for example, spirally over the circumference of the flow channel body 100, so that flow channels 30 for the flow of hydraulic fluid are formed. The helix angle of the helically distributed flow channels 30 is set in the range of 1 to 42. The flow passage 30 serves to communicate two main liquid chambers formed in the hydraulic bushing with each other so that hydraulic fluid can flow between the two main liquid chambers through the flow passage 30. Therefore, the hydraulic bushing has variable rigidity, so that the characteristics of low rigidity at low frequency and high rigidity at high frequency are achieved, and the vibration damping effect of the hydraulic bushing is effectively improved.

According to the present invention, the interval between the axially adjacent grooves 15 forming the flow passage 30 is set to be not less than 3mm, and in the embodiment shown in fig. 2, the sectional shape of the grooves 15 is set to be rectangular. According to the present invention, the cross-sectional shape of the groove 15 can also be set to a trapezoidal or other geometric shape. The size and the structure of the groove 15 can effectively ensure that the flow passage 30 has good connectivity, thereby effectively ensuring the variable rigidity adjusting performance of the hydraulic bushing.

According to the present invention, the flow channel 30 of the flow channel body 100 is used to provide a radial stiffness to the hydraulic bushing. Thus, the geometric parameters of the flow passage 30, such as cross-sectional area and length, can be designed according to the requirements for radial stiffness of the hydraulic bushing.

In the present embodiment, both ends of the flow channel 30 extend to both axial end surfaces of the flow channel body 100 to form the channel opening 35. The port openings 35 at both ends of the flow path 30 are respectively located in two main liquid chambers formed in the hydraulic bushing so as to communicate with two diametrically opposed main liquid chambers in the hydraulic bushing, thereby enabling hydraulic fluid to flow between the two main liquid chambers through the flow path 30.

According to the present invention, the flow channel body 100 is made of a metal material. In a preferred embodiment, the runner body 100 may be made of 16MnCr5, Q345E, Q235, steel No. 45, 40Cr or 42 CrMo. Preferably, the runner body 100 is made of 16MnCr 5. Thus, the flow channel body 100 has high strength and rigidity and is not easily deformed by stress. Therefore, the flow passage body 100 according to the present invention has a long service life.

Fig. 3 is an enlarged view of region B in fig. 2. As shown in fig. 3, according to the present invention, a rubber layer 40 is provided on the outer surface 10 of the channel fluid 100 in a region where the groove 15 is not formed. In a preferred embodiment, the rubber layer 40 is formed on the outer surface 10 of the runner body 100 by means of vulcanization.

By providing the rubber layer 40 on the outer surface 10 of the runner body 100, the runner body 100 can be better press-fitted into the casing of the hydraulic bushing, providing a good sealing effect. Meanwhile, due to the rubber layer 40 arranged on the outer surface 10 of the flow passage body 100, the adjacent flow passage sections 31 and 32 in the flow passage 30 of the flow passage body 100 are well sealed, and the hydraulic fluid is prevented from flowing and leaking between the adjacent flow passage sections 31 and 32. Therefore, the performance of the flow channel body 100 is greatly improved.

According to a preferred embodiment of the present invention, the thickness of the rubber layer 40 provided on the outer surface 10 of the flow path body 100 is set to be in the range of 0.1mm to 2 mm.

During the manufacturing process, the rubber layer 40 may be first disposed on the outer surface 10 of the runner body 100, and then the groove 15 is processed. The processing technology is convenient for processing the runner body 100, can effectively ensure the processing precision of the runner 30, and the connection tightness and the neatness of the rubber layer 40 and the surface of the runner body, can effectively avoid the influence on the connectivity of the runner 30 caused by the mispasting of the rubber layer, and can further ensure the sealing performance between the runner body 100 and the outer sleeve of the hydraulic bushing.

According to the utility model discloses an inner wall contact of the overcoat that is used for the runner body 100 of hydraulic pressure bush, and is equipped with rubber layer 40 on the outer wall of runner body 100 to make runner 30 have good sealed effect, avoided the hydraulic fluid at the drunkenness between adjacent runner section 31 and 32 and leaked, greatly improved the performance of runner body 100. The flow path body 100 communicates two main liquid chambers formed in the hydraulic bushing with each other through the flow path 30 so that hydraulic fluid can flow between the two main liquid chambers through the flow path 30. Therefore, the hydraulic bushing can realize the function of changing rigidity in the radial direction or the axial direction, and the vibration reduction effect of the hydraulic bushing is obviously improved.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1. Flow channel body for a hydraulic bushing, which flow channel body is designed as a sleeve-shaped component, on the outer surface of which flow channel (30) formed by a continuous groove (15) for the passage of hydraulic fluid is provided,

characterized in that the runner body is made of metal and a rubber layer (40) is provided on the non-grooved area of the outer surface of the runner body.

2. The runner body of claim 1 wherein the rubber layer is vulcanized to the outer surface of the runner body.

3. The flow channel body according to claim 1 or 2, wherein the thickness of the rubber layer is set to be in the range of 0.1mm to 2 mm.

4. The runner body of claim 1 or 2, wherein the metal is 16MnCr5 or Q345E.

5. The runner body of claim 1, wherein the grooves are distributed helically around the circumference of the runner body to form the runners.

6. The flow channel body according to claim 5, wherein the helix angle of the helically arranged flow channels is arranged in the range of 1 ° -42 °.

7. The flow channel body according to claim 5 or 6, wherein a pitch between the axially adjacent grooves forming the flow channel is set to not less than 3 mm.

8. The flow conduit body of claim 7, wherein the cross-sectional shape of the flow conduit is configured as a rectangle, trapezoid, or other geometric shape.

9. The flow channel body of claim 8, wherein the cross-sectional area and length of the flow channel is determined based on the desired radial dynamic stiffness and damping coefficient of the hydraulic bushing.

10. Flow channel body according to claim 1 or 5, characterised in that both ends of the flow channel are provided with a flow channel opening (35) extending radially through the side wall of the flow channel body.

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