JP2019120275A - Mount device - Google Patents

Abstract

To improve durability of a mount device.SOLUTION: A mount device 100 includes: shock absorber side members 20a, 20b connected to a shock absorber 10; a vehicle body side member 30 connected to a vehicle body 1 facing the shock absorber side members 20a, 20b in an axial direction of the shock absorber 10; magnetic elastomers 40a, 40b provided between the shock absorber side members 20a, 20b and the vehicle body side member 30; and an electromagnetic coil 50 for changing an elastic characteristic of the magnetic elastomers 40a, 40b by imparting the magnetic field to the magnetic elastomers 40a, 40b. A space S is provided which allows swelling in the radial direction of the magnetic elastomers 40a, 40b.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a mounting device for connecting a shock absorber provided between a vehicle body and an axle to the vehicle body.

  As a mounting device for connecting a suspension device provided between a vehicle body and an axle to a vehicle body, one configured to damp the vibration of the vehicle body is known, and Patent Document 1 can change the damping characteristic. A mounting device is disclosed. The mounting device disclosed in Patent Document 1 is a cylindrical outer member fixed to the vehicle body with a space between the cylindrical inner member fixed to the outer periphery of the shaft of the suspension device and the outer periphery of the inner member. And a magnetic elastomer provided between the inner member and the outer member. By applying a current to the electromagnetic coil to apply a magnetic field to the magnetic elastomer, the rigidity of the magnetic elastomer is changed, thereby changing the damping characteristics of the mounting device.

U.S. Pat. No. 5,609,353

  In the mounting device disclosed in Patent Document 1, the magnetic elastomer is provided between the inner member and the outer member which face each other in the radial direction of the shaft of the suspension device. Therefore, when an impact is applied to the shaft in the axial direction, the magnetic elastomer is sheared and deformed. An elastic member such as an elastomer has a property of being easily damaged at the time of shear deformation, and the mounting device disclosed in Patent Document 1 may lack durability.

  An object of the present invention is to improve the durability of a mounting device.

  According to a first aspect of the present invention, a shock absorber side member, a car body side member facing the shock absorber side member in the axial direction of the shock absorber, a magnetic elastic member provided between the shock absorber side member and the car body side member, and magnetism And an electromagnetic coil that applies a magnetic field to the elastic member to change the elastic characteristics of the magnetic elastic member, and is characterized in that a space for allowing the magnetic elastic member to expand in the radial direction is provided.

  In the first aspect of the invention, the vehicle body side member is axially opposed to the shock absorber side member, and the magnetic elastic member is provided between the shock absorber side member and the vehicle body side member. Therefore, when an impact is applied to the shock absorber in the axial direction, the magnetic elastic member expands and contracts in a direction in which the vehicle body side member and the shock absorber side member face each other. Therefore, the impact can be absorbed without shear deformation of the magnetic elastic member. Further, since the space allows the magnetic elastic member to expand in the radial direction, the magnetic elastic member is easily contracted in the axial direction, and the shock applied to the shock absorber can be absorbed.

  A second invention is characterized in that the electromagnetic coil is provided between the vehicle body side member and the shock absorber.

  In the second invention, the magnetic field generated by the electromagnetic coil is guided in a loop between the vehicle body side member and the shock absorber. Therefore, the magnetic field leaking to the shock absorber without passing from the vehicle body side member to the magnetic elastic member can be reduced, and the attenuation characteristics of the mounting device can be efficiently changed.

  A third aspect of the invention is characterized in that the vehicle body side member further includes a restriction member which allows displacement of the shock absorber side member in the axial direction with respect to the vehicle body side member and restricts radial displacement. I assume.

  In the third invention, since the movement of the shock absorber side member is limited by the limiting member, the shear deformation of the magnetic elastic member is limited. Therefore, the durability of the mounting device can be further improved.

  A fourth invention is characterized in that the shock absorber side member and the vehicle body side member are made of a magnetic material, and the limiting member is made of a nonmagnetic material.

  In the fourth invention, the magnetic field passing through the shock absorber side member formed of an electromagnetic coil and made of a magnetic material and the vehicle body side member passes through the magnetic elastic member. Therefore, the magnetic field efficiently acts on the magnetic elastic member, and the attenuation characteristics of the mounting device can be efficiently changed.

  According to a fifth aspect of the invention, the shock absorber side member has first and second shock absorber side members spaced apart from each other in the axial direction, and the vehicle body side member comprises the first shock absorber side member and the second shock absorber The magnetic elastic member is provided between the first shock absorber side member and the vehicle body side member, the first magnetic elastic member provided between the first shock absorber side member and the vehicle body side member, the second shock absorber side member and the vehicle body side member And a second magnetic elastic member provided therebetween.

  In the fifth invention, when the shock absorber receives an impact in a direction to bring the first shock absorber side member closer to the vehicle body side member, the first magnetic elastic member contracts and the shock absorber receives an impact in the opposite direction. The magnetic elastic member contracts. Therefore, even if the first and second magnetic elastic members are not firmly joined to the first and second shock absorber side members and the vehicle body side member, the impact can be absorbed. Thus, the manufacture of the mounting device is facilitated.

  According to the present invention, the durability of the mounting device is improved.

FIG. 1 is a view showing a shock absorber connected to a vehicle body using a mounting device according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of the mounting apparatus according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view of the mounting apparatus shown in FIG. 2, showing the shock absorber moved upward. FIG. 4 is a cross-sectional view of a mounting apparatus according to a second embodiment of the present invention.

  Hereinafter, mounting devices 100 and 200 according to the embodiment of the present invention will be described with reference to the attached drawings.

First Embodiment
First, a mounting apparatus 100 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. The mounting device 100 is used to connect the shock absorber 10 and the vehicle body 1 of the vehicle.

  As shown in FIG. 1, the shock absorber 10 includes a cylinder 11 connected to the axle 3 of the wheel 2 and a rod 12 movably inserted into the cylinder 11. The rod 12 projects from the cylinder 11 and is connected to the vehicle body 1 via the mounting device 100.

  A suspension spring (not shown) is provided along with the shock absorber 10 between the vehicle body 1 and the axle 3. The expansion and contraction of the suspension spring absorbs an impact that the wheel 2 receives from the road surface G when the vehicle travels. At this time, the shock absorber 10 expands and contracts with the suspension spring to generate a flow of hydraulic fluid inside the cylinder 11. The cylinder 11 is provided with a damping force generating unit such as a damping valve, and the damping force generating unit applies resistance to the flow of hydraulic oil, and the shock absorber 10 exerts damping force. Thereby, the vibration due to the suspension spring is damped and the vibration of the vehicle body 1 is suppressed.

  The shock absorber 10 is not limited to the above-described configuration, but may be expanded and contracted by a linear motor or the like to exhibit a damping force.

  As shown in FIG. 2, the rod 12 of the shock absorber 10 has a main body 12 a that enters and exits the cylinder 11, and a small diameter part 12 b whose outer diameter is smaller than the outer diameter of the main body 12 a. The small diameter portion 12b is provided continuously from the main body portion 12a, and the stepped portion 12c is formed between the main body portion 12a and the small diameter portion 12b.

  A nut 14 as a fastening member is screwed into the outer periphery of the small diameter portion 12 b of the rod 12. An annular inner member 13 through which the small diameter portion 12 b is inserted is provided between the nut 14 and the step 12 c of the rod 12, and the inner member 13 secures a distance between the step 12 c and the nut 14.

  The mounting device 100 is attached to the rod 12 of the shock absorber 10 using a nut 14. Hereinafter, the structure of the mounting apparatus 100 will be specifically described.

  The mounting apparatus 100 is connected to the vehicle body 1 using annular first and second shock absorber side members 20a and 20b as shock absorber side members extending in the radial direction of the shock absorber 10 and bolts (not shown). And an annular first and second magnetic elastomers (Magneto-rheological elastomers) 40a and 40b as first and second magnetic elastic members. The small diameter portion 12b of the rod 12 and the inner member 13 pass through the first and second shock absorber side members 20a and 20b, the vehicle body side member 30, and the first and second magnetic elastomers 40a and 40b.

  The first and second shock absorber side members 20a and 20b are provided to be spaced apart from each other in the axial direction of the shock absorber 10 between the step 12c of the rod 12 and the nut 14, and the first and second shock absorber side members A vehicle body side member 30 is provided between the members 20a and 20b. The first magnetic elastomer 40 a is provided between the first shock absorber side member 20 a and the vehicle body side member 30, and the second magnetic elastomer 40 b is provided between the second shock absorber side member 20 b and the vehicle body side member 30. Be That is, the first magnetic elastomer 40a, the vehicle body side member 30, the second magnetic elastomer 40b and the second shock absorber side member 20b are stacked in this order on the step 12c of the rod 12 and held by the step 12c and the nut 14. Ru.

  Thus, the mounting device 100 is attached to the rod 12 using the nut 14. Then, by connecting the vehicle body side member 30 to the vehicle body 1, the rod 12 is connected to the vehicle body 1 via the mounting device 100.

  The end faces 41 a and 42 a of the first magnetic elastomer 40 a are respectively joined to the first shock absorber side member 20 a and the vehicle body side member 30. Similarly, the end faces 41 b and 42 b of the second magnetic elastomer 40 b are respectively joined to the second shock absorber side member 20 b and the vehicle body side member 30.

  In FIG. 3, the wheel 2 (see FIG. 1) has climbed over an elevated portion of the road surface G or an obstacle (not shown) on the road surface G, for example, and the shock absorber 10 moves upward (in the direction of the white arrow) with the wheel 2 Indicates When the shock absorber 10 moves upward as shown in FIG. 3, the first shock absorber side member 20 a is pushed by the step 12 c of the rod 12 and moves upward. At this time, the first magnetic elastomer 40 a contracts in the axial direction from the first shock absorber side member 20 a to contract between the first shock absorber side member 20 a and the vehicle body side member 30. Therefore, the amount of movement of the vehicle body side member 30 can be made smaller than the amount of movement of the first shock absorber side member 20a, and the displacement of the vehicle body 1 can be reduced.

  Although the illustration is omitted, when the wheel 2 (see FIG. 1) reaches a recess (not shown) of the road surface G and the shock absorber 10 moves downward with the wheel 2, the second shock absorber side member 20 b is It is pushed and it moves downward. At this time, the second magnetic elastomer 40 b contracts in the axial direction from the second shock absorber side member 20 b to contract between the second shock absorber side member 20 b and the vehicle body side member 30. Therefore, the amount of movement of the vehicle body side member 30 can be made smaller than the amount of movement of the second shock absorber side member 20b, and the displacement of the vehicle body 1 can be reduced.

  As described above, in the mounting device 100, the displacement of the vehicle-body-side member 30 accompanying the vertical movement of the shock absorber 10 is mitigated by the first and second magnetic elastomers 40a and 40b. Therefore, the displacement of the vehicle body 1 can be reduced, and the ride quality of the vehicle can be improved.

  In the mounting device 100, when the shock absorber 10 moves upward, the first magnetic elastomer 40a contracts. Therefore, even if the second magnetic elastomer 40b does not extend, the displacement of the vehicle body side member 30 is reduced. That is, even in the state where the second magnetic elastomer 40 b is not joined to the second shock absorber side member 20 b and the vehicle body side member 30, the displacement of the vehicle body 1 can be reduced.

  Similarly, when the shock absorber 10 moves downward, the second magnetic elastomer 40b contracts. Therefore, even if the first magnetic elastomer 40a does not extend, the displacement of the vehicle body side member 30 is reduced. That is, even in the state where the first magnetic elastomer 40a is not joined to the first shock absorber side member 20a and the vehicle body side member 30, the displacement of the vehicle body 1 can be reduced.

  As described above, in the mounting device 100, when the shock absorber 10 moves in the axial direction, one of the first and second magnetic elastomers 40a and 40b is contracted, and the displacement of the vehicle body side member 30 is reduced. Therefore, the displacement of the vehicle body 1 can be reduced even in a state where the first and second magnetic elastomers 40a and 40b are not firmly joined to the first and second shock absorber side members 20a and 20b and the vehicle side member 30. . Therefore, the manufacture of the mounting apparatus 100 is facilitated.

  The first and second magnetic elastomers 40a and 40b are made of an elastomer containing magnetic particles. The elastomer is, for example, a rubber material such as natural rubber, synthetic rubber, polyurethane or the like.

  Elastomers have the property of being susceptible to damage during shear deformation. Therefore, if the first and second magnetic elastomers 40a and 40b are sheared to absorb an impact, the durability of the mounting device may be reduced.

  In the mounting device 100, when an impact is applied to the shock absorber 10 in the axial direction, the first and second magnetic elastomers 40a and 40b are the vehicle body side member 30 and the first and second shock absorber side members 20a and 20b. And contract in a direction in which they face each other. Therefore, the impact can be absorbed without shear deformation of the first and second magnetic elastomers 40a and 40b, and damage to the first and second magnetic elastomers 40a and 40b can be prevented. Thereby, the durability of the mounting device 100 can be improved.

  The magnetic particles contained in the first and second magnetic elastomers 40a and 40b are, for example, iron powder and ferrite powder. The magnetic particles may be powders of rare earth magnets composed of neodymium, iron and boron, and powders of rare earth magnets composed of samarium, iron and nitrogen.

  When a magnetic field is applied to the first and second magnetic elastomers 40a and 40b, the magnetic particles are magnetically polarized and aligned in both directions of the magnetic lines of force, and the magnetic coupling between the polarized magnetic particles becomes strong. As a result, the elastic modulus of the first and second magnetic elastomers 40a and 40b is increased. Thus, the elastic properties of the first and second magnetic elastomers 40a and 40b change according to the magnitude of the applied magnetic field.

  The mounting apparatus 100 further includes an electromagnetic coil 50 that applies a magnetic field to the first and second magnetic elastomers 40a and 40b. The electromagnetic coil 50 is made of a copper wire wound a plurality of times along the inner periphery of the vehicle body side member 30, and is connected to the controller 53 via the lead wires 51 and 52. When a current is supplied from the controller 53 to the electromagnetic coil 50, a magnetic field is formed by the electromagnetic coil 50. In FIG. 2, magnetic lines of force are indicated by thick arrows. The magnetic field generated by the electromagnetic coil 50 acts on the first and second magnetic elastomers 40a and 40b to increase the elastic modulus of the first and second magnetic elastomers 40a and 40b.

  Thus, in the mounting apparatus 100, the magnetic field applied to the first and second magnetic elastomers 40a and 40b can be changed by changing the current supplied to the electromagnetic coil 50. Thereby, the elastic characteristics of the first and second magnetic elastomers 40a and 40b can be changed, and the attenuation characteristics of the mounting device 100 can be changed.

  The controller 53 supplies the current to the electromagnetic coil 50 by changing the magnitude of the current according to the state of the road surface G (see FIG. 1). Therefore, the attenuation characteristics of the mounting device 100 can be changed according to the state of the road surface G, and the ride quality of the vehicle can be improved. The state of the road surface G is detected, for example, by an acceleration sensor (not shown) attached to the cylinder 11 of the shock absorber 10. The controller 53 may supply the current to the electromagnetic coil 50 by changing the magnitude of the current according to the traveling speed of the vehicle.

  The first and second shock absorber side members 20a and 20b, the vehicle body side member 30 and the inner member 13 are made of a magnetic material and form a magnetic path. As described above, the first and second shock absorber side members 20a and 20b and the vehicle body side member 30 are provided at intervals in the axial direction of the shock absorber 10, respectively, and the first and second magnetic elastomers are interposed therebetween. 40a and 40b are provided respectively. Therefore, the magnetic field acts on the first and second magnetic elastomers 40a and 40b in the axial direction. Therefore, the elastic characteristics of the first and second magnetic elastomers 40a and 40b can be changed in the axial direction, and the attenuation characteristics of the mounting device 100 can be easily changed.

  The first and second magnetic elastomers 40a and 40b are provided apart from the inner member 13 through which the small diameter portion 12b of the rod 12 is inserted, and the first and second magnetic elastomers 40a and 40b are separated between the first and second magnetic elastomers 40a and 40b and the inner member 13. A space S is provided to allow radial expansion of the first and second magnetic elastomers 40a and 40b. Therefore, when an impact is applied to the shock absorber 10 in the axial direction, the first and second magnetic elastomers 40 a and 40 b are easily contracted in the axial direction, and can absorb the impact applied to the shock absorber 10. Furthermore, a magnetic field guided in a loop shape between the vehicle body side member 30 and the inner member 13 by the space S can be concentrated on the first and second magnetic elastomers 40a and 40b to change elastic characteristics. As a result, the attenuation characteristics of the mounting apparatus 100 can be efficiently changed.

  The electromagnetic coil 50 is provided between the inner periphery of the vehicle body side member 30 and the outer periphery of the inner member 13. Therefore, the magnetic field formed by the electromagnetic coil 50 is guided in a loop between the vehicle body side member 30 and the inner member 13. Therefore, the magnetic field leaking to the inner member 13 without passing through the first and second magnetic elastomers 40a and 40b from the vehicle body side member 30 can be reduced, and the attenuation characteristics of the mounting device 100 can be efficiently changed. .

  In addition, the mounting device 100 further includes an outer shell 60 as a limiting member sandwiched by the vehicle-side member 30 and the vehicle body 1. The outer shell 60 opposes the first shock absorber side member 20a in the radial direction of the shock absorber 10, and allows the first shock absorber side member 20a to be displaced in the axial direction of the shock absorber 10 with respect to the vehicle body side member 30. While limiting the displacement of the shock absorber 10 in the radial direction. Therefore, relative displacement of the end surface 41a of the first magnetic elastomer 40a in the radial direction with respect to the end surface 42a is limited, and shear deformation of the first magnetic elastomer 40a is limited. Therefore, damage to the first magnetic elastomer 40a can be prevented, and the durability of the mounting device 100 can be improved.

  Similarly, the outer shell 60 radially faces the second shock absorber side member 20b, and allows the second shock absorber side member 20b to be displaced in the axial direction with respect to the vehicle body side member 30, while the radial direction To limit displacement. Therefore, relative displacement of the end face 41b of the second magnetic elastomer 40b in the radial direction with respect to the end face 42b is limited, and shear deformation of the second magnetic elastomer 40b is limited. Therefore, damage to the second magnetic elastomer 40b can be prevented, and the durability of the mounting device 100 can be improved.

  The outer shell 60 is made of a nonmagnetic material such as SUS304 or aluminum. Therefore, leakage of the magnetic field formed by the electromagnetic coil 50 from the vehicle body side member 30 and the first and second shock absorber side members 20a and 20b to the outer shell 60 can be reduced. Therefore, it is possible to apply a magnetic field intensively to the first and second magnetic elastomers 40a and 40b to change the elastic characteristics, and to change the attenuation characteristics of the mounting device 100 efficiently.

  The outer shell 60 may not be held by the vehicle body side member 30 and the vehicle body 1. For example, the vehicle body side member 30 may be connected to the vehicle body 1 without the outer shell 60, and the outer shell 60 may be provided on the vehicle body side member 30.

  According to the first embodiment described above, the following effects can be obtained.

  In the mounting device 100, the vehicle body side member 30 faces the first and second shock absorber side members 20a and 20b in the axial direction of the shock absorber 10, and the first and second magnetic elastomers 40a and 40b correspond to the first and second shock absorbers. It is provided between the device side members 20a and 20b and the vehicle body side member 30, respectively. Therefore, the impact applied to the shock absorber 10 in the axial direction can be absorbed without shear deformation of the first and second magnetic elastomers 40a and 40b. Therefore, damage to the first and second magnetic elastomers 40a and 40b can be prevented, and the durability of the mounting device 100 can be improved.

  In addition, the first and second magnetic elastomers 40a and 40b are provided separately from the inner member 13, and the first and second magnetic elastomers 40a are disposed between the first and second magnetic elastomers 40a and 40b and the inner member 13. , 40b in the radial direction is provided. Therefore, the first and second magnetic elastomers 40 a and 40 b easily shrink in the axial direction, and can absorb the shock applied to the shock absorber 10.

  Also, the electromagnetic coil 50 is provided between the vehicle body side member 30 and the inner member 13. Therefore, the magnetic field leaking to the inner member 13 without passing the first and second magnetic elastomers 40a and 40b from the vehicle body side member 30 can be reduced. Therefore, the attenuation characteristics of the mounting apparatus 100 can be changed efficiently.

  Further, the outer shell 60 restricts displacement of the first and second shock absorber side members 20 a and 20 b in the radial direction of the shock absorber 10 with respect to the vehicle body side member 30. Therefore, shear deformation of the first and second magnetic elastomers 40a and 40b is limited. Therefore, damage to the first and second magnetic elastomers 40a and 40b can be prevented, and the durability of the mounting device 100 can be improved.

  Further, the outer shell 60 is made of nonmagnetic material. Therefore, it is possible to apply a magnetic field intensively to the first and second magnetic elastomers 40a and 40b to change the elastic property. Therefore, the attenuation characteristics of the mounting apparatus 100 can be changed efficiently.

  In the mounting device 100, when the shock absorber 10 receives an impact in the axial direction, either the first or second magnetic elastomer 40a or 40b contracts to absorb the shock absorption. Therefore, even if the first and second magnetic elastomers 40a and 40b are not firmly joined to the first and second shock absorber side members 20a and 20b and the vehicle body side member 30, the impact can be absorbed. Therefore, the manufacture of the mounting apparatus 100 is facilitated.

  In the mounting apparatus 100, a space S for allowing the radial expansion of the first and second magnetic elastomers 40a and 40b is provided between the first and second magnetic elastomers 40a and 40b and the inner member 13. However, such a space S may be provided between the first and second magnetic elastomers 40a and 40b and the outer shell 60, that is, radially outward of the first and second magnetic elastomers 40a and 40b. .

Second Embodiment
Next, with reference to FIG. 4, a mounting apparatus 200 according to a second embodiment of the present invention will be described. In the following, differences from the mounting apparatus 100 (see FIGS. 2 and 3) according to the first embodiment will be mainly described, and the same configurations as or corresponding to the configurations described in the first embodiment will be described. The same reference numerals as in the first embodiment are added to the first embodiment and the description is omitted. Moreover, since the vehicle body and the shock absorber which are mutually connected using the mounting device 200 are substantially the same as the vehicle body 1 and the shock absorber 10 shown in FIG. 1, the illustration thereof is omitted.

  The mounting device 100 comprises two shock absorber side members 20a, 20b and two magnetic elastomers 40a, 40b, whereas the mounting device 200 comprises one shock absorber side member 220 and one magnetic elastomer 240, It differs from the mounting device 100. Hereinafter, the structure of the mounting device 200 will be described in detail.

  As shown in FIG. 4, the shock absorber side member 220 is held between the step 12 c of the rod 12 and the nut 14, and moves in synchronization with the rod 12. The vehicle body side member 230 is connected to the vehicle body 1 so as to face the shock absorber side member 220 in the axial direction, and the magnetic elastomer 240 is provided between the shock absorber side member 220 and the vehicle body side member 230. The end surfaces 241 and 242 of the magnetic elastomer 240 are joined to the shock absorber side member 220 and the vehicle body side member 230, respectively.

  When the shock absorber 10 receives an impact upward, the magnetic elastomer 240 elongates to absorb the impact. When the shock absorber 10 receives a downward impact, the magnetic elastomer 240 contracts to absorb the impact.

  As described above, in the mounting device 200, when the shock absorber 10 receives an impact in the axial direction, the magnetic elastomer 240 expands and contracts to absorb the shock absorption. Therefore, impact can be absorbed without shear deformation of the magnetic elastomer 240, and damage to the magnetic elastomer 240 can be prevented. Thereby, the durability of the mounting device 200 can be improved.

  Further, the magnetic elastomer 240 a is provided apart from the small diameter portion 12 b of the rod 12, and a space S is provided between the magnetic elastomer 240 a and the rod 12 to allow expansion of the magnetic elastomer 240 in the radial direction. Further, a space allowing the magnetic elastomer 240 to expand in the radial direction is also provided on the radial outside of the magnetic elastomer 240 a. Therefore, the magnetic elastomer 240 is easily contracted in the axial direction, and can absorb the shock applied to the shock absorber 20.

  The electromagnetic coil 50 is provided between the vehicle body side member 230 and the small diameter portion 12 b of the rod 12. Therefore, the magnetic field leaking to the small diameter portion 12 b without passing the magnetic elastomer 240 from the vehicle body side member 230 can be reduced. Therefore, the attenuation characteristics of the mounting apparatus 100 can be changed efficiently.

  Similar to the mounting device 100, the mounting device 200 may include an outer shell 60 shown in FIG. In this case, the shear deformation of the magnetic elastomer 240 can be limited, and the durability of the mounting device 200 can be improved. Further, by forming the outer shell 60 of a nonmagnetic material, it is possible to apply a magnetic field intensively to the magnetic elastomer 240 to change the elastic property.

  Hereinafter, the configuration, operation, and effects of the embodiment of the present invention will be collectively described.

  The present embodiment relates to mounting devices 100 and 200 that connect the shock absorber 10 provided between the axle 3 and the vehicle body 1 to the vehicle body 1. The mounting devices 100, 200 are provided with shock absorber side members 20 a, 20 b, 220 extending in the radial direction of the shock absorber 10, and the vehicle body facing the shock absorber side members 20 a, 20 b, 220 in the axial direction of the shock absorber 10. 1 and magnetic body elastomers 40a, 40b, 240 provided between the shock absorber side members 20a, 20b, 220 and the car body side members 30, 230, and magnetic elastomers 40a, 40b, A space S is provided, which includes an electromagnetic coil 50 for applying a magnetic field to 240 to change the elastic properties of the magnetic elastomers 40a, 40b, 240, and allowing radial expansion of the magnetic elastomers 40a, 40b, 240.

  In this configuration, the vehicle body side members 30, 230 axially face the shock absorber side members 20a, 20b, 220, and the magnetic elastomers 40a, 40b, 240 correspond to the shock absorber side members 20a, 20b, 220 and the vehicle side member 30, It is provided between them and 230. Therefore, when an impact is applied to the shock absorber 10 in the axial direction, the magnetic elastomers 40a, 40b, and 240 force the vehicle body side members 30, 230 and the shock absorber side members 20a, 20b, 220 in the direction opposite to each other. Receive and stretch. Therefore, the impact can be absorbed without shear deformation of the magnetic elastomers 40a, 40b and 240. This improves the durability of the mounting devices 100 and 200. Further, since the space S allows the magnetic elastomers 40a, 40b, 240 to expand in the radial direction, the magnetic elastomers 40a, 40b, 240 are easily contracted in the axial direction, and absorb the shock applied to the shock absorber 10. be able to.

  Further, in the mounting device 100, 200, the electromagnetic coil 50 is provided between the vehicle-body-side member 30, 230 and the shock absorber 10.

  In this configuration, the magnetic field formed by the electromagnetic coil 50 is guided in a loop between the vehicle body side members 30 and 230 and the shock absorber 10. Therefore, the magnetic field leaking from the vehicle body side member 30, 230 to the shock absorber 10 without passing through the magnetic elastomers 40a, 40b, 240 can be reduced, and the attenuation characteristics of the mounting devices 100, 200 can be efficiently changed. it can.

  In addition, the mounting device 100 is provided on the vehicle body side member 30, and allows the shock absorber side members 20a and 20b to be displaced in the axial direction with respect to the vehicle body side member 30, and limits the displacement in the radial direction. 60 is further provided.

  In this configuration, since the movement of the shock absorber side members 20a and 20b is limited by the outer shell 60, shear deformation of the magnetic elastomers 40a and 40b is limited. Therefore, the durability of the mounting device 100 can be further improved.

  In the mounting device 100, the shock absorber side members 20a and 20b and the vehicle body side member 30 are made of a magnetic material, and the outer shell 60 is made of a nonmagnetic material.

  In this configuration, a magnetic field passing through the shock absorber side members 20a and 20b formed of the electromagnetic coil 50 and made of a magnetic material and the vehicle body side member 30 passes through the magnetic elastomers 40a and 40b. Therefore, a magnetic field acts on the magnetic elastomers 40a and 40b efficiently, and the attenuation characteristics of the mounting device 100 can be efficiently changed.

  In the mounting device 100, the shock absorber side members 20a and 20b have the first and second shock absorber side members 20a and 20b spaced apart from each other in the axial direction, and the vehicle body side member 30 is the first shock absorber The magnetic elastomers 40a and 40b are provided between the side member 20a and the second shock absorber side member 20b, and the first magnetic elastomer 40a provided between the first shock absorber side member 20a and the vehicle body side member 30; And a second magnetic elastomer 40b provided between the second shock absorber side member 20b and the vehicle body side member 30.

  In this configuration, when the shock absorber 10 receives an impact in a direction in which the first shock absorber side member 20a approaches the vehicle body side member 30, the first magnetic elastomer 40a contracts and the shock absorber 10 receives an impact in the reverse direction. The second magnetic elastomer 40b contracts. Therefore, even if the first and second magnetic elastomers 40a and 40b are not firmly joined to the first and second shock absorber side members 20a and 20b and the vehicle body side member 30, the impact can be absorbed. Therefore, the manufacture of the mounting apparatus 100 is facilitated.

  As mentioned above, although embodiment of this invention was described, said each embodiment showed only one of the application example of this invention, and the meaning which limits the technical scope of this invention to the specific structure of the said embodiment is not.

  Reference Signs List 1: vehicle body 3: axle shaft 10: shock absorber 20a: first shock absorber side member (shock absorber side member) 20 b: second shock absorber side member (shock absorber side) Member), 30: vehicle body side member, 40a: first magnetic elastomer (magnetic elastic member), 40b: second magnetic elastomer (magnetic elastic member), 50: electromagnetic coil, 60: Outer shell (restricting member) 100, 200 ... mounting device 220 ... shock absorber side member 230 ... vehicle body side member 240 ... magnetic elastomer (magnetic elastic member)

Claims (5)

A mounting device for connecting a shock absorber provided between an axle and a vehicle body to the vehicle body, the mount device comprising:
A radially extending shock absorber side member of the shock absorber;
A vehicle body side member connected to the vehicle body, facing the shock absorber side member in an axial direction of the shock absorber;
A magnetic elastic member provided between the shock absorber side member and the vehicle body side member;
And an electromagnetic coil that applies a magnetic field to the magnetic elastic member to change elastic characteristics of the magnetic elastic member.
A mounting device provided with a space for allowing the magnetic elastic member to expand in the radial direction. The mounting apparatus according to claim 1, wherein
The mounting apparatus is characterized in that the electromagnetic coil is provided between the vehicle body side member and the shock absorber. The mounting apparatus according to claim 1 or 2,
The vehicle body side member is further provided with a restriction member which permits displacement of the shock absorber side member in the axial direction with respect to the vehicle body side member and restricts displacement in the radial direction. Mounting device. The mounting apparatus according to claim 3, wherein
The shock absorber side member and the vehicle body side member are made of a magnetic material,
The said limiting member consists of nonmagnetic materials, The mounting apparatus characterized by the above-mentioned. The mounting apparatus according to any one of claims 1 to 4, wherein
The shock absorber side member includes first and second shock absorber side members spaced from each other in the axial direction,
The vehicle body side member is provided between the first shock absorber side member and the second shock absorber side member,
The magnetic elastic member is provided between a first magnetic elastic member provided between the first shock absorber side member and the vehicle body side member, and between a second shock absorber side member and the vehicle body side member. And 2 a magnetic elastic member.

Images