Magnetorheological elastomer bushing

Abstract

The utility model relates to a magneto-rheological elastomer bushing which comprises a metal inner pipe, a magneto-rheological elastomer, a first metal outer pipe, a second metal outer pipe and a conductive coil, the magneto-rheological elastomer is sleeved on the periphery of the metal inner pipe, the first metal outer pipe is sleeved on the periphery of the magneto-rheological elastomer, an annular groove is arranged on the peripheral surface of the first metal outer pipe, and the conductive coil is arranged in the annular groove. The conductive coil is wound in the annular groove, a wire groove is formed in the groove wall of the annular groove, a wire is arranged in the wire groove, the conductive coil is connected with the wire, and the second metal outer pipe is arranged on the periphery of the first metal inner pipe in a sleeving mode; the end face of the magnetorheological elastomer is provided with a first diameter, a first area and a second area, the first area and the second area are located on the two sides of the first diameter respectively, and a plurality of grooves are formed in the first area and the second area respectively. According to the utility model, the suspension comfort and supporting performance can be ensured through the special structure of the magneto-rheological elastomer.

Description

Technical Field

[0001] The utility model relates to a shock-absorbing bushing for an automobile, in particular to a novel magnetorheological elastomer bushing. Background Art

[0002] Shock-absorbing bushings are an important part of the automobile suspension system, among which magnetorheological elastomer bushings are a new type of shock-absorbing bushings. The stiffness of magnetorheological elastomer bushings can be actively adjusted, which can better meet the requirements of automobile intelligence and electrification.

[0003] The existing magnetorheological elastomer bushings still have room for improvement in structure to provide better support and comfort for the automobile suspension system. Summary of the invention

[0004] The utility model aims to provide a magnetorheological elastomer bushing with optimized structure and capable of providing better support and comfort for a vehicle suspension system.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A magnetorheological elastomer bushing comprises a metal inner tube, a magnetorheological elastomer, a first metal outer tube, a second metal outer tube and a conductive coil, wherein the magnetorheological elastomer is sleeved on the outer circumference of the metal inner tube, the first metal outer tube is sleeved on the outer circumference of the magnetorheological elastomer, an annular groove is provided on the outer circumferential surface of the first metal outer tube, the conductive coil is wound in the annular groove, a wire groove is provided on the groove wall of the annular groove, a wire is provided in the wire groove, the conductive coil is connected to the wire, and the second metal outer tube is sleeved on the outer circumference of the first metal outer tube; the end surface of the magnetorheological elastomer has a first diameter and a first area and a second area, the first area and the second area are respectively located on both sides of the first diameter, and a plurality of grooves are respectively provided in the first area and the second area.

[0007] The first region and the second region are symmetrically located on both sides of the first diameter, and the groove opened in the first region is symmetrical with the groove opened in the second region.

[0008] The end surface of the magnetorheological elastomer also has a second diameter perpendicular to the first diameter, and the first area and the second area are symmetrically located at two ends of the second diameter.

[0009] The grooves opened in the first region are symmetrical about the second diameter, and the grooves opened in the second region are symmetrical about the second diameter.

[0010] The groove is an arc-shaped groove.

[0011] The widths at both ends of the arc-shaped groove are greater than the width in the middle of the arc-shaped groove.

[0012] The depth of the arc-shaped groove increases gradually from inside to outside along the radial direction of the magnetorheological elastomer.

[0013] The outer diameter of the conductive coil is smaller than the outer diameter of the first metal outer tube.

[0014] The first metal outer tube is interference fit with the second metal outer tube.

[0015] The magnetorheological elastomer includes a rubber matrix and magnetic conductive particles distributed in the rubber matrix.

[0016] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art: the utility model can ensure the comfort and support of the suspension through the special structure of the magnetorheological elastomer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 It is a schematic diagram of the appearance of the magnetorheological elastomer bushing of the utility model.

[0018] Attached Figure 2 It is a cross-sectional view of the magnetorheological elastomer bushing of the utility model.

[0019] Attached Figure 3 It is an axonometric view of the first metal outer tube in the magnetorheological elastomer bushing of the utility model.

[0020] Attached Figure 4 It is a top view of the magnetorheological elastomer bushing of the utility model.

[0021] In the above figures: 1. conductor; 2. metal inner tube; 3. magnetorheological elastomer; 4. first metal outer tube; 5. second metal outer tube; 6. conductive coil; 7. conductor groove; 8. annular groove. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the embodiments shown in the accompanying drawings.

[0023] Embodiment 1: As shown in the attached Figure 1 To Attachment Figure 4 As shown, a magnetorheological elastomer bushing includes a metal inner tube 2, a magnetorheological elastomer 3, a first metal outer tube 4, a second metal outer tube 5 and a conductive coil 6.

[0024] The metal inner tube 2 is a straight tube. The magnetorheological elastomer 3 is sleeved on the outer periphery of the metal inner tube 2, and includes a rubber matrix and a plurality of magnetic conductive particles distributed in the rubber matrix. The magnetorheological elastomer 3 is roughly cylindrical, and has end faces at both axial ends. Each side end face of the magnetorheological elastomer 3 has a first diameter and a first region and a second region. Among them, the first region and the second region are respectively located on both sides of the first diameter. A plurality of grooves are respectively provided in the first region and the second region, so that a hole structure with grooves is formed at both ends of the first diameter, while the two ends of the first diameter remain as a solid structure. Generally, the first region and the second region where the grooves are provided need to be symmetrically distributed on both sides of the first diameter, and the grooves provided in the first region are symmetrical with the grooves provided in the second region. The preferred scheme is: the end face of the magnetorheological elastomer 3 also has a second diameter perpendicular to the first diameter, the first region and the second region are symmetrically located at both ends of the second diameter, and the grooves provided in the first region are symmetrical about the second diameter, and the grooves provided in the second region are symmetrical about the second diameter. As a result, the magnetorheological elastomer 3 forms a solid structure in the first diameter direction, providing higher rigidity to ensure that the suspension has sufficient support, and a hole structure in the second diameter direction with low rigidity to ensure the comfort of the suspension.

[0025] In this embodiment, the groove is an arc groove, and one arc groove is provided in each of the first region and the second region. In the end surface direction of the magnetorheological elastomer 3, the width of the two ends of the arc groove is greater than the width of the middle of the arc groove. In the cross-sectional direction of the magnetorheological elastomer 3, the depth of the arc groove increases from the inside to the outside along the radial direction of the magnetorheological elastomer 3.

[0026] The first metal outer tube 4 is sleeved on the outer periphery of the magnetorheological elastomer 3, and an annular groove 8 is provided on the outer peripheral surface of the first metal outer tube 4. The conductive coil 6 is wound in the annular groove 8. A wire groove 7 is provided on the groove wall of the annular groove 8, and the wire groove 7 is connected to the annular groove 8, and a wire 1 is arranged in the wire groove 7. The conductive coil 6 is connected to one end of the wire 1, and the other end of the wire 1 is connected to the power supply outside the bushing. The wire 1 connected to the conductive coil 6 is led to the outside of the bushing through the wire groove 7, and the wire groove 7 can protect the wire 1 from being damaged. The annular groove 8 on the first metal outer tube 4 can ensure the regularity of the conductive coil 6 winding in the annular groove 8, eliminating the cost of winding tooling, and the conductive coil 6 is wound in the annular groove 8 of the first metal outer tube 4 to ensure that the heat generated by the conductive coil 6 during operation can be dissipated in time through the first metal outer tube 4, and the working environment is better.

[0027] The second metal outer tube 5 is sleeved on the outer circumference of the first metal outer tube 4, and the first metal outer tube 4 and the second metal are interference fit. The outer diameter of the conductive coil 6 is smaller than the outer diameter of the first metal outer tube 4, which can ensure that the second metal outer tube 5 will not cause extrusion damage to the conductive coil 6 during the interference fit process between the first metal outer tube 4 and the second metal outer tube 5 and during the radial operation of the bushing. The second metal outer tube 5 seals the conductive coil 6 in the annular groove 8 of the first metal outer tube 4, which can prevent external dust, impurities and other foreign matter from entering the conductive coil 6, and protect the conductive coil 6. The outer diameter flat wires of the first metal outer tube 4 are all chamfered structures, which ensures that the interference fit between the second metal outer tube 5 and the first metal outer tube 4 is carried out smoothly.

[0028] The metal inner tube 2 and the first metal outer tube 4 are both made of aluminum alloy. Since aluminum alloy is a non-magnetic material, only the magnetorheological elastomer 3 is a magnetic material inside the conductive coil 6. At this time, the magnetic field strength of the magnetorheological elastomer 3 is stronger. The second metal outer tube 5 is made of steel material, which can shield the magnetic field generated by the conductive coil 6 to a certain extent and reduce the influence of leakage magnetic field on external components.

[0029] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A magnetorheological elastomer bushing, characterized in that: The magnetorheological elastomer bushing includes a metal inner tube, a magnetorheological elastomer, a first metal outer tube, a second metal outer tube and a conductive coil. The magnetorheological elastomer is sleeved on the outer circumference of the metal inner tube, the first metal outer tube is sleeved on the outer circumference of the magnetorheological elastomer, an annular groove is provided on the outer circumference of the first metal outer tube, the conductive coil is wound in the annular groove, a wire groove is provided on the groove wall of the annular groove, a wire is provided in the wire groove, the conductive coil is connected to the wire, and the second metal outer tube is sleeved on the outer circumference of the first metal outer tube; the end surface of the magnetorheological elastomer has a first diameter and a first area and a second area, the first area and the second area are respectively located on both sides of the first diameter, and a plurality of grooves are respectively provided in the first area and the second area.

2. The magnetorheological elastomer bushing according to claim 1, characterized in that: The first region and the second region are symmetrically located on both sides of the first diameter, and the groove opened in the first region is symmetrical with the groove opened in the second region.

3. The magnetorheological elastomer bushing according to claim 2, characterized in that: The end surface of the magnetorheological elastomer also has a second diameter perpendicular to the first diameter, and the first area and the second area are symmetrically located at two ends of the second diameter.

4. The magnetorheological elastomer bushing according to claim 3, characterized in that: The grooves opened in the first region are symmetrical about the second diameter, and the grooves opened in the second region are symmetrical about the second diameter.

5. The magnetorheological elastomer bushing according to claim 4, characterized in that: The groove is an arc-shaped groove.

6. The magnetorheological elastomer bushing according to claim 5, characterized in that: The widths at both ends of the arc-shaped groove are greater than the width in the middle of the arc-shaped groove.

7. The magnetorheological elastomer bushing according to claim 5 or 6, characterized in that: The depth of the arc-shaped groove increases gradually from inside to outside along the radial direction of the magnetorheological elastomer.

8. The magnetorheological elastomer bushing according to claim 1, characterized in that: The outer diameter of the conductive coil is smaller than the outer diameter of the first metal outer tube.

9. The magnetorheological elastomer bushing according to claim 1, characterized in that: The first metal outer tube is interference fit with the second metal outer tube.

10. The magnetorheological elastomer bushing according to claim 1, characterized in that: The magnetorheological elastomer includes a rubber matrix and magnetic conductive particles distributed in the rubber matrix.

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