JP2001174368A - Vibration test device for wheel support leg - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support leg vibration test device capable of accurately measuring the stress of a cantilever support leg for a wheel. SOLUTION: In this vibration test device for measuring the vibration stress to be applied to a cantilever support leg 3 for a wheel 2 at a tip 3a thereof while pushing the wheel 2 to a rotary drum 1 for rotation, a bottom end 3b of the support leg 3 is held by a holding member 4 turnably in the vertical direction, and this holding member 4 is formed with a bending stress relaxing mechanism provided with elastic members 7, 47 for allowing the vibration of the support leg 3 in the right and left direction and relaxing the bending stress applied to the support leg 3 in the right and left direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration test apparatus for a wheel supporting leg in a retractable wheel system in which a wheel is lowered from a storage portion only when a wheel is used, such as a magnetically levitated railway vehicle (linear motor car) or an aircraft. More specifically, the present invention relates to a vibration test device for measuring a stress acting on a support leg that cantileverly holds the wheel.

[0002]

2. Description of the Related Art Maglev trains and aircraft wheels are
Normally, it is stored in the vehicle body (in the aircraft) (in parentheses, for aircraft; the same applies hereinafter), but immediately before stopping (landing), the supporting legs having wheels at the tip from the vehicle body (in the aircraft) by hydraulic cylinders After the wheels are grounded on the track (the runway), the vehicle body (body) is stopped by braking the grounded wheels with the brake device.

In this case, the traveling speed of the wheels is several hundreds per hour.
m, and when a braking force is applied to the wheel in this state, considerable stress is applied to the support leg holding the wheel, and if the support leg is damaged, a major accident may occur. Because of the possibility of confirming the safety of the support legs, it is common practice to use the actual support legs to perform a test for measuring the stress due to vibration during high-speed running and vibration during braking. It is.

As shown in FIG. 7 which is a schematic plan view of the conventional vibration test apparatus, a holding plate 50 fixed to a vertical stand 54 with bolts 51 has wheels such as tires at its tip. The rear end of the supporting leg 53 to which the rotation of the supporting leg 55 is rotatably mounted is held by the horizontal rotating shaft 52 so as to be freely rotatable in the vertical direction. The distal end of a rod 59 is rotatably connected, and the rear end of the lifting cylinder 58 with a damper is rotatably mounted in a vertical direction on a fixing plate 60 fixed to the vertical base 54 by bolts 61, Further, the wheel 55 is pressed against the surface of the rotary drum 56, and rotates at a predetermined speed together with the rotation of the rotary drum 56 which is driven to rotate at an arbitrary speed by a driving device (not shown) such as a motor. Constitution It has been.

In such an apparatus, in testing, first, the wheel 55 is lowered by the lift cylinder 58 and stopped in contact with the rotating surface of the rotary drum 56, and is held in that state by the damper mechanism of the lift cylinder 58. Is done. The structure of the lifting cylinder 58 with a damper is as described in Japanese Patent Application Laid-Open No. 9-254785. Next, the wheel 55 is pressed against the rotating drum 56 with a force corresponding to the gravity actually acting on the wheel by an appropriate means such as the gravity of the vertical frame 54 or the pressing force of the lifting cylinder 58 with the damper. Have been. In this state, the rotary drum 56 is forcibly rotated at a predetermined rotation speed, and the wheels 55 are rotated in accordance with the forced rotation. At this time, the stress caused by vibration or the like acting on the support legs 53 is measured. .

[0006]

The support leg has a so-called cantilever support system in which only one side of the wheel axle is held by the support leg. In this case, the rotation plane of the wheel is used. And the support plane of the support leg are parallel to each other. As a result, a bending stress acts on the support leg during rotation or braking of the wheel. That is, when only one end of the axle 57 of the wheel 55 is held by the support leg 53 as shown in FIG. When the wheel 55 is rotated in the direction, a force acts on the wheel 55 in a direction in which the wheel 55 is pulled in the direction of rotation. As a result, a bending stress as shown by an arrow b in FIG. The rear end portion 53 is rotatable by the horizontal rotation shaft 52 only in the vertical direction by the holding plate 50, but in the horizontal direction (the left-right direction in the drawing).
The bending stress acts on the supporting leg 53 as bending strain.

Further, when a braking test is performed by operating a brake on a rotating wheel, the wheel 55 and the rotating drum 56
As a result, the wheel 55 is pulled with a greater force than in the free rotation in the direction of the arrow a, which is the direction of rotation of the rotary drum, so that the support leg 53 Means that a large bending stress acts in the direction of arrow b.

As described above, in the case of the support leg 53 having the structure in which the wheel 55 is cantilevered, a bending stress which cannot be generated in the case of the both-end supporting method for supporting both ends of the axle 57 acts, Accurate measurement of stress on the supporting legs by only the vibration of the wheels is not possible. Therefore, an object of the present invention is to solve the problems in the cantilever support system.

[0009]

SUMMARY OF THE INVENTION The present invention has been made on the basis of this point, and is characterized by a point that a bending stress relaxation mechanism for relaxing bending stress acting on a support leg is provided. More specifically, vibration stress acting on a supporting leg that presses and rotates a freely rotating wheel on a rotating surface of a rotating drum that is driven to rotate in a vertical plane, and that cantileverly holds the wheel at a tip end portion. A supporting member that holds a rear end of the support leg rotatably in a vertical direction, and the holding member allows the support leg to swing in the left-right direction. And a bending stress relieving mechanism provided with an elastic member that opposes bending stress acting on the support leg in the left-right direction. Thus, the bending stress acting on the support leg is reduced by the bending stress relaxation mechanism.

[0010] The holding member has a structure in which a rear end of the support leg is rotatably held in a vertical direction by a horizontal rotating shaft, and one end of the holding plate is vertically rotated. A first fixing member that is rotatably held in a horizontal direction via a shaft and fixed to a vertical gantry, and a second fixing member that holds the other end of the holding plate and is fixed to the vertical gantry An elastic member is interposed between at least one of the other end of the holding plate and the vertical gantry and between the other end and the second fixing member, and the action of the elastic member There is a method in which the other end of the holding plate is swingably held by the second fixing member. That is, by forming a rotation fulcrum at one end of the holding plate for holding the support leg and making the other end swingable, and by disposing an elastic member at the other end, the support leg is In this case, the bending stress acting on the substrate is reduced.

In addition, if the holding member can be mounted by reversing the left / right position of the holding member corresponding to the left / right position of the wheel with respect to the support leg, the wheel can be located on either the left or right side of the support leg. Also, just reverse the left and right mounting position of the holding member,
It can be easily handled.

[0012] As another preferable configuration of the holding member, a holding plate holding the rear end of the support leg so as to be rotatable up and down by a horizontal rotating shaft, and a center portion of the holding plate being a vertical rotating shaft. A central fixing member that is held swingably in the horizontal direction through and fixed to the vertical gantry, and an elastic member disposed between the left and right ends of the holding plate and the vertical gantry, There is one in which a bending stress acting on the support leg is reduced by an elastic member. In this case, since the holding plate holding the support legs is held at the center so as to be swingable in the left-right direction, the bending stress from either the left or right direction is reduced by the elastic member.

In another preferred embodiment, the wheels are moved up and down by a hydraulic cylinder device equipped with a damper, and the wheels are pressed against a rotating drum with a predetermined force, and the vertical frame is made movable up and down. It is also possible to adopt a method in which a load to be applied to the wheels is adjusted by mounting a load on the vertical frame to adjust the amount of load by the load.

[0014] Further, a protrusion that gives vertical vibration to the wheel is removably attached to an appropriate position on the rotating surface of the rotary drum, thereby enabling a vibration test in which various vertical vibrations during running are imparted to the wheel. Becomes

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing an entire configuration of a wheel supporting leg test apparatus according to the present invention.
Are arranged in contact with the rotating running surface 1a of the rotating drum 1, and the wheels 2 are rotated by forcibly rotating the rotating drum 1 by a driving device (not shown). The wheel 2 is cantilevered at the tip of a support leg 3, and the rear end of the support leg 3 is vertically rotated by a support leg holding member 4 fixed to a vertical gantry 11 by a configuration described later. It is movable and swingably held in the left-right direction.

A hydraulic cylinder device 8 with a damper is connected to the distal end of the support leg 3 so that the wheel 2 can be moved up and down by the cylinder device 8. The hydraulic cylinder device 8 with a damper is a known device,
It has a function of adjusting a relative position between the wheel 2 and the rotating drum 1 and fixing the relative position, and a function of buffering vibration caused by the rotation of the wheel. As such a hydraulic cylinder device 8 with a damper, one described in Japanese Patent Application Laid-Open No. 9-254785 is preferable.

The rear end of the hydraulic cylinder device 8 with a damper is fixed to a fixing member 14 by means of a ball joint or the like so as to be rotatable in the vertical and horizontal directions. It is fixed to the same vertical gantry 11 together with the holding member 4 for holding the rear end. The vertical gantry 11 can be moved up and down with respect to the base 13 by a hydraulic cylinder device 15.
Is configured to be mountable. The weight of the load body 12 is configured to act as a pressing load on the rotating drum 1 on the wheels 2 fixed in position by the hydraulic cylinder device 8 with the damper via the vertical mount 11.

The distal end of the support leg 3 is connected to the distal end of a vibrating rod 19 of an electromagnetic vibrator 16 so that horizontal vibration can be applied during rotation of the wheel 2 if necessary. It has become. Further, a vertical vibration is also given by a hydraulic cylinder device 15 supporting the vertical gantry 11. The base 13 and the electromagnetic vibrator 16
Are mounted on a gantry 17, and a work walk deck 18 is arranged around the gantry 17.

Next, the bending stress relaxation mechanism of the support leg according to the present invention will be described in detail. FIG. 2 is a perspective view showing only a main part of the vibration test apparatus according to the present invention, and FIG.
It is AA sectional drawing of FIG. In both figures, the vertical stand 1
1 is a holding plate 5 connected to the rear end 3b of the support leg 3 via a horizontal rotating shaft 10.
A first fixing member 6a for holding one end 5a of the holding plate rotatably in a horizontal direction by a vertical rotation shaft 9;
b to the vertical gantry 11 with bolts 29.

As shown in FIG. 3, the holding plate 5 holds the rear end 3b of the support leg 3 so as to be rotatable vertically by a horizontal rotating shaft 10 mounted via a roll bearing 21. It has become. Also, one end 5a of the holding plate 5
Is attached to the first fixing member 6a fixed to the vertical and vertical gantry 11 by bolts 22 so as to be rotatable in the left-right direction via the vertical rotation shaft 9. On the other hand, the other end 5b of the holding plate 5 is held by a second fixing member 6b fixed to the vertical gantry 11 by bolts 20, and a recess 24 is formed on the back surface of the other end 6b. 24, a pair of disc springs 7 are inserted.
A force is applied to the other end 6b in a direction to separate the other end 6b of the holding plate 5 from the surface of the vertical gantry 11, and a gap is formed between the other end 6b and the surface of the vertical gantry 11. It is to be done. The second fixing member 6b and the other end 5b of the holding plate 5 can be moved by the holding bolt 23 in the thickness direction of the second fixing member 6b (vertical direction in the drawing). Is held in. As a result, the holding plate 5
The one end 5a is held by the first fixing member 6a so as to be rotatable in a horizontal plane by a vertical rotation shaft 9, and the other end 5a
b has a structure held by the second fixing member 6b while receiving a force in a direction away from the vertical gantry 11 by the disc spring 7.

With this configuration, in FIG. 2, when the rotating drum 1 is rotated in the direction of arrow a in the figure, the frictional force acting on the rotating running surface 1a of the drum and the surface of the wheel 2 causes
A bending stress acts on the support leg 3 in the direction of the arrow b in the figure, but against the reaction force of the disc spring 7, the first fixing member 6
The support leg 3 swings rightward in the figure around the vertical rotation axis 9 of FIG. Further, when the braking device 25 mounted on the side surface of the wheel 2 is operated, the wheel 2
Although the frictional force acting between the surface of the rotating drum 1 and the rotating running surface 1a of the rotating drum 1 further increases, also in this case, the supporting leg 3 is further swung to reduce the bending stress. In the drawing, reference numeral 26 denotes a fixture for fixing the braking device 25 so that the braking device 25 disposed on the side surface of the wheel 2 does not rotate together with the rotation of the wheel 2. Further, as is apparent from the above description, the spring force of the disc spring 7 is required to exhibit a sufficient force to oppose the bending stress acting on the support leg 3 when the brake is operated. Needless to say.

The positional relationship between the support legs 3 and the wheels 2 is such that the wheel train arranged on the right side of the vehicle and the wheel train arranged on the left side of the vehicle are arranged so as to have a target positional relationship. There are both a wheel (left wheel, in the case of FIG. 2) in which the wheel 2 is disposed toward the support leg 3 and a wheel (right wheel) in which the wheel 2 is disposed on the right. That is, the case of FIG. 2 corresponds to the above-mentioned left wheel, and a bending stress acts on the support leg 3 in the direction of arrow b in the figure. The stress is also reversed. Therefore, since the support leg holding member 4 shown in FIGS. 2 and 3 cannot be used as it is, the mounting of the holding member 4 to the vertical gantry 11 is reversed left and right, that is, it is located on the left side in the drawings. In the case of a right wheel, the first fixing member 6a is arranged on the right side, the second fixing member 6b located on the right side in the figure is arranged on the left side, and the holding plate 5 is also arranged left and right in accordance with this. Can be handled similarly.

Since the support leg 3 is basically separate from the left wheel and the right wheel, the support leg 3 is connected to the rear end 3b of the support leg 3 and the holding plate 5 via the horizontal rotating shaft 10. The mounting must be performed each time, but the support leg 3 and the mounting portion 27 of the hydraulic cylinder device 8 with a damper are also arranged below the tip 3a of the support leg 3 (27 'in the figure). The connection between the support leg 3 and the hydraulic cylinder device 8 with a damper is released, and the holding plate 5 on which the support leg 3 is mounted is reversed, and the first fixing member 6a and the second fixing member 6b form a vertical frame. After the attachment, the lower mounting portion 27 'and the hydraulic cylinder device 8 with a damper can be connected. The same applies to the case where the test is performed by rotating the rotary drum 1 in the opposite direction (in the direction opposite to the arrow a in the figure) regardless of the left wheel and the right wheel.

The above description is an example in which the disc spring 7 is interposed between the other end 5b of the holding plate 5 and the vertical gantry 11, but the present invention is not limited to this. Not
It is also possible to arrange the disc spring 7 between the second fixing member 6b and the other end 5b of the holding plate 5. In this case,
To explain with reference to FIG. 2, unlike the case shown in the figure (left wheel), the specification is for the right wheel or when the rotating drum is rotated in the direction opposite to the direction of arrow a in the figure.

Further, the disc spring 7 is moved between the other end 5b of the holding plate 5 and the vertical stand 11 and the second fixing member 6
b and the other end 5b. In this case, regardless of the rotation direction of the rotary drum 1 or the positional relationship between the wheels 2 and the support legs 3, any one of the disc springs will act. This makes it possible to continuously perform the test of the normal rotation and the reverse rotation of the rotating drum by the combination of the same wheel and the support legs, and an effect of improving the test efficiency can be expected.

FIG. 4 is a sectional view of a main part showing another embodiment of a supporting leg holding member used in the present invention. The supporting leg holding member can cope with bending stress acting on the supporting leg from either the left or right direction. It is provided with a simple bending stress relaxation mechanism. That is, in the same figure, the rear end 3b of the support leg 3 is held on the support leg holding plate 45 so as to be rotatable in the vertical direction by the horizontal rotating shaft 10, which is the same as the above-described embodiment. In this example, the center of the holding plate 45 is held by the center fixing member 46 via the vertical rotation shaft 9 so as to be swingable in the left-right direction. The structure is fixed to the vertical gantry 11 by the bolt 41 via the elastic member 47. Thus, the support leg 3 can swing in the left and right directions within the range of the elasticity of the elastic member 47, and the bending stress acting on the support leg 3 is reduced by the elastic member 47.
It is configured to be alleviated by. In the figure, 42
Are bolts for fixing the center fixing member to the vertical gantry 11.

Therefore, in the present embodiment, unlike the above-described embodiment, the test can be performed without changing the attachment of the support leg holding member 4 for both the left wheel and the right wheel. Therefore, when performing a test in which the rotation direction of the rotary drum is changed in the test of one support leg, it is possible to immediately proceed to the rearward rotation test of the rotary drum immediately after the rotary drum is mounted as it is, following the forward rotation test of the rotary drum. Therefore, there is an effect of improving the test efficiency.

FIG. 5 is a partial sectional view of a drum showing a modification of the rotary drum 1 used in the present invention.
Is a cross-sectional view taken along the line BB, in which a projection 1c protruding from the running surface of the drum is arranged at a connecting portion of each of the drum pieces 1b divided into a plurality of pieces by an aluminum alloy or the like. . That is, a projecting piece 1c is attached to a connecting portion of a drum piece 1b forming a smooth running surface so as to slightly project from the outside to the outside, and both are fixed by bolts 30. As a result, the wheel rotating in contact with the running surface of the drum 1 is vibrated in the vertical direction at the portion of the projection 1c, and gives vibration to the wheel without using another forced vibration device. In this case, the stress of the supporting leg received at the time can be measured. In addition, the height h of the projection piece 1c.
And the width w can be arbitrarily changed, and by changing the height h and the width w of the protruding piece 1c to appropriately different ones,
It is possible to perform tests giving various levels of vibration.

In the above description, the pressing force for pressing the wheel 2 against the rotating drum 1 is a force corresponding to the component force acting on the actual wheel, and the pressing force is mounted on the upper part of the vertical stand 11 described above. The wheel 2 can be pressed against the surface of the rotating drum by the hydraulic cylinder device 8 with the damper, in addition to the adjustment by the load amount of the load body 12 to be applied. It is needless to say that by adjusting one or both of the pressures, the pressing force of the wheel 2 against the rotating drum 1 can be adjusted.

In the embodiment shown in FIG. 3, a disc spring 7 is used as a member for holding the holding plate 5 on the holding member 4 so as to be able to swing freely and relaxing bending stress acting on the support leg 3. However, this is not limited to the disc spring, and a rubber plate or a leaf spring as shown in FIG. 4 can be used, and an appropriate elastic member suitable for achieving the object of the present invention can be selected.

The object supporting leg to which the present invention is applied may be any type such as a wheel supporting leg of a magnetic levitation type vehicle or a wheel supporting leg of an aircraft, which is of a type in which the wheel is pulled out of the main body only when the wheel is used. Good.

[0032]

As described above, according to the present invention, in the vibration test of the support leg supporting the wheel in a cantilever manner, the holding member holding the support leg is allowed to swing in the horizontal direction. The bending stress acting on the support legs, which has been a problem in the cantilever support method, is provided by the bending stress relaxation mechanism provided with the elastic member for relaxing the bending stress acting on the support member. In addition, it is possible to measure the stress acting on the supporting leg when the vibration is truly generated.

[0033] In addition, as the structure of the holding member, one end of a holding plate, which holds the rear end of the support leg rotatably in the vertical direction by a horizontal rotation axis, is rotated in a horizontal direction via a vertical rotation axis. If it is configured to hold freely and swingably via an elastic member between the other end and the vertical stand,
Since the bending stress acting in the direction of the other end is reduced by the elastic member arranged in the other end, when the bending stress acts in the opposite direction, the mounting of the holding plate should be reversed left and right. Can be easily handled.

Further, if the elastic member is interposed both between the other end of the support leg holding plate and the vertical frame and between the second fixing member for fixing the holding plate to the vertical frame. ,
Even if a bending stress is applied to the support leg from either the left or right direction, the bending stress will be relieved by one of the elastic members. In this case, the supporting leg holding member can be used in any of forward rotation and backward rotation of the rotary drum.

Further, as the structure of the holding member, a holding plate holding the rear end of the support leg so as to be rotatable vertically by a horizontal rotation shaft, and a vertical rotation shaft at a center portion of the holding plate. A center fixing member that is rotatably held in the horizontal direction through the base and fixed to the vertical gantry, and an elastic member disposed between the left and right ends of the holding plate and the vertical gantry. By adopting a configuration in which the bending stress acting on the support leg is relieved by the member, the holding plate holding the support leg can swing right and left at the center,
Since the bending stress from any of the left and right directions is reduced by the elastic member, the support member of either the left wheel or the right wheel, or any one of the forward rotation and the backward rotation of the rotating drum can be used. Even in this case, the test can be performed as it is without changing the attachment of the holding member, and an improvement in test efficiency can be expected.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a supporting leg vibration test apparatus according to the present invention.

FIG. 2 is a perspective view of a main part of the support leg vibration test apparatus of FIG. 1;

FIG. 3 is a sectional view of a main part of the support leg holding member of FIG. 2;

FIG. 4 is a sectional view of a main part showing another embodiment of a supporting leg holding member used in the supporting leg vibration test apparatus according to the present invention.

FIG. 5 is a partial cross-sectional view showing another embodiment of the rotating drum used in the supporting leg vibration test apparatus according to the present invention.

FIG. 6 is a sectional view taken along line BB of FIG. 5;

FIG. 7 is a side view of a main part showing a conventional support leg vibration test apparatus.

FIG. 8 is a plan view of a main part of FIG. 7;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rotating drum 1a rotating surface of rotating drum 1b drum piece 1c projection piece 2 wheel 3 support leg 3a tip of support leg 3b rear end of support leg 4 support leg holding member 5,45 holding plate 5a rotation shaft of holding plate (One end) 5b Swing end (other end) of holding plate 6a First fixing member 6b Second fixing member 7, 47 Elastic member (disc spring, rubber plate) 8 Hydraulic cylinder device with damper 9 Vertical rotation shaft 10 Horizontal rotation axis 11 Vertical mount 13 Base

Claims (10)

[Claims] 1. A freely rotating wheel (2) is pressed against a rotating running surface (1a) of a rotating drum (1) which is driven to rotate in a vertical plane, and the wheel (2) is rotated at its tip (3).
a) a vibration test device for measuring a vibration stress acting on a supporting leg (3) that is cantilevered, wherein a rear end (3b) of the supporting leg (3) is attached to a holding member (4).
The holding member (4) allows the support leg (3) to swing in the left-right direction, and allows the holding member (4) to swing in the left-right direction and acts on the support leg (3) in the left-right direction. A vibration test apparatus for a wheel supporting leg, comprising a bending stress relaxation mechanism provided with an elastic member (7, 47) for withstanding a bending stress of a wheel. 2. The holding member (4) is configured to move a rear end (3b) of the support leg (3) to a horizontal rotation shaft (1).
0), a holding plate (5) held rotatably in the up-down direction and one end (5a) of the holding plate (5) by a vertical rotating shaft (9).
And a first fixing member (6a) fixed to the vertical gantry (11), and the other end (5b) of the holding plate (5), while being rotatably held in the horizontal direction via. And a second fixing member (6) fixed to the vertical frame (11).
b), the other end (5b) of the holding plate (5) and the vertical mount (1).
1) and / or at least one of the other end (5b) and the second fixing member (6b) with an elastic member (7) interposed therebetween. 2. The wheel support leg according to claim 1, wherein the other end portion (5 b) is swingably held by the second fixing member (6 b) about a rotation axis (9) of the fixing member (5 a). 3. Vibration test equipment 3. The left and right mounting of the holding plate (5) is reversed corresponding to the left and right mounting positions of the wheel (2) with respect to the support leg (3), and the holding plate (5) is mounted on the vertical frame (3). 11) The right and left arrangement of the first fixing member (6a) and the second fixing member (6b) fixed to the vertical mount (1) is reversed.
3. The vibration test device for a wheel supporting leg according to claim 2, wherein the vibration test device is configured to be fixable to 1). 4. The holding member (4) is configured to move a rear end (3b) of the support leg (3) to a horizontal rotation shaft (1).
0), a holding plate (45) rotatably held in the vertical direction, and a center portion of the holding plate (45) held swingably in a horizontal direction via a vertical rotation shaft (9). Vertical stand (11)
A central fixing member (46) fixed to the left and right ends of the holding plate (45) and the vertical mount (1).
An elastic member (47) disposed between the support leg (1) and the elastic member (47), wherein the elastic member (47) relieves bending stress acting on the support leg (3). Wheel support leg vibration test equipment 5. A tip (3) of the support leg (3)
a) and a wheel (2) is raised and lowered by lifting and lowering the support leg (3) by a hydraulic cylinder device (8) with a damper, the rear end of which is connected to the vertical frame (11). A vibration test apparatus for a wheel supporting leg according to any one of claims 2 to 4. 6. The vertical frame (1) on a base (13).
The vibration test apparatus for a wheel supporting leg according to any one of claims 2 to 5, wherein 1) is held so as to be able to move up and down. 7. A load body (12) mounted on the vertical gantry (11).
The wheel support according to any one of claims 2 to 6, wherein the pressing force of the wheel (2) against the rotating drum (1) can be adjusted by adjusting the amount of load by the load body (21). Leg vibration test equipment 8. A rotary running surface (1) of the rotary drum (1).
The vibration test device for a wheel supporting leg according to any one of claims 2 to 7, wherein a protrusion (30) for giving a vertical vibration to the wheel (2) is detachably mounted at an appropriate position of a). 9. A vibration test apparatus for a wheel supporting leg according to claim 1, wherein said supporting leg is a wheel supporting leg of a magnetically levitated railway vehicle. 10. A vibration test device for a wheel support leg according to claim 1, wherein said support leg is a support leg for an aircraft wheel.