WO2017022654A1

WO2017022654A1 - Vibration test machine

Info

Publication number: WO2017022654A1
Application number: PCT/JP2016/072277
Authority: WO
Inventors: 正吉原島
Original assignee: カヤバシステムマシナリー株式会社
Priority date: 2015-07-31
Filing date: 2016-07-29
Publication date: 2017-02-09
Also published as: JP2017032417A; JP6166754B2

Abstract

The purpose of the present invention is to provide a vibration test machine that does not impart forced vibration to a straddle vehicle while enabling brake vibration testing, and that allows attachment of the straddle vehicle at the base position. [Solution] In order to attain the aforementioned objective, the vibration test machine (T) according to the present invention comprises: a front wheel side vibrator (1) capable of applying vibration to the front wheel axle (11) of a straddle vehicle (M) in a fore-aft direction and a vertical direction; a rear wheel side vibrator (2) capable of applying vibration to the rear wheel axle (12) in a vertical direction; and an extendable member (4) that is provided between the rear wheel axle (12) and a regulating member (3), is capable of expansion and contraction, and undergoes maximum compression upon contracting a predetermined amount from the neutral position.

Description

Vibration testing machine

The present invention relates to a vibration testing machine.

Conventionally, as a vibration tester, for example, there is one that can test a motorcycle by applying vertical and horizontal vibrations. Such a vibration testing machine is designed to give vibration to a motorcycle with the axle of the motorcycle as an excitation point. Specifically, as disclosed in JPH05-149833 (A), the vibration tester includes an actuator that applies vertical vibration to a front wheel axle, an actuator that applies horizontal vibration, and a rear wheel side. Three actuators are provided, which are actuators that apply vertical vibrations to the axle.

In the case of a motorcycle, the front fork that suspends the front wheels against the vibration input has a large function, so when reproducing the vibration of the body frame when the vehicle is running, an actuator that vibrates horizontally with respect to the rear wheel axle. It is unnecessary.

The vibration testing machine configured in this manner gives vertical and horizontal vibrations to the motorcycle body with three actuators, so that vibration close to the vibration input from the road surface when the motorcycle actually travels. Given to the car body.

Here, the conventional vibration testing machine includes a rod that is rotatably connected to a reaction force jig that is fixed at one end and rotatably connected to the rear wheel side axle. The movement in the horizontal direction on the rear wheel side of the two-wheeled vehicle is restricted. In this vibration testing machine, due to the restraint of the horizontal movement of the motorcycle, when the motorcycle brakes only at the front wheel side when driving at low speed, the vehicle body dives forward and the rear wheel floats from the ground. A load can be applied to a motorcycle.

Thus, in the conventional vibration testing machine, the horizontal movement of the rear wheel side of the motorcycle can be restrained by the rod, so that a brake vibration test which is a vibration load test when a jack knife phenomenon occurs can be performed.

¡In this way, there is a benefit of providing a rod, but the following problems arise. First, one end of the rod is hinged to the reaction force jig, and when the rod swings around the hinge, the tip of the rod on the motorcycle side draws an arc-shaped trajectory. There is a problem of applying extra forced vibration in the front-rear direction.

Also, when attaching or detaching a motorcycle to or from a vibration testing machine, you want to do it at the lowest point (base position) when the hydraulic pressure of the actuator is turned off, but if you place the motorcycle at the base position with the hydraulic pressure of the actuator turned off Since it is pulled by the rod and a load in the front-rear direction acts, it cannot be attached or detached at the base position. Therefore, in the conventional vibration testing machine, pressure oil is sent to the actuator and placed in a position where the load in the longitudinal direction from the rod does not act on the motorcycle, and this motorcycle must be attached and detached. There is room for improvement in terms of workability.

Accordingly, the present invention has been made to solve the above-described problems, and the object of the present invention is to enable a brake vibration test, but does not apply a forced vibration to the saddle riding vehicle, and the saddle riding at the base position. Providing a vibration tester that can be attached and detached.

In order to achieve the above-described object, the vibration testing machine of the present invention includes a front wheel side vibrator that can vibrate a front wheel shaft of a saddle vehicle, a rear wheel side vibrator that can vibrate a rear wheel shaft, And an expansion / contraction member provided between the wheel shaft and the regulating member and capable of expanding and contracting and being compressed most when contracted by a predetermined amount from the neutral position.

It is a side view of the vibration testing machine in one embodiment. It is a schematic sectional drawing of the expansion-contraction member in one embodiment. It is a schematic sectional drawing of the modification of the expansion-contraction member in one embodiment.

Hereinafter, the present invention will be described based on the embodiments shown in the drawings. As shown in FIG. 1, a vibration testing machine T according to an embodiment is a test body, and the front wheel shaft 11 is used as a motorcycle with the front wheel shaft 11 and the rear wheel shaft 12 of a motorcycle M as a saddle vehicle as excitation points. A front wheel side vibration exciter 1 that can vibrate in the vertical direction (Z-axis direction) in FIG. 1 and the front-rear direction (X-axis direction) in FIG. 1 and the rear wheel shaft 12 in the vertical direction in FIG. A rear-wheel side vibration exciter 2 capable of exciting in the Z-axis direction), a restricting member 3 fixedly disposed behind the motorcycle M, and a telescopic member 4 provided between the rear wheel shaft 12 and the restricting member 3; It has.

Hereinafter, each part of the vibration testing machine T will be described in detail. The front-wheel side vibration exciter 1 is attached to the gantry B, and the first vibration unit 5 that vibrates in the vertical direction with the front wheel shaft 11 of the motorcycle M as an oscillating point. And a second excitation unit 6 that applies vibration. Further, the rear wheel side vibrator 2 is attached to the gantry B and vibrates in the vertical direction with the rear wheel shaft 12 of the motorcycle M as an excitation point.

A motorcycle M, which is a saddle-ride vehicle, includes a vehicle body 13, a front fork 14 that is rotatably attached to the front of the vehicle body 13 and has a front wheel shaft 11 at the tip, and is swingably attached to the rear of the vehicle body 13. And a swing arm 15 having a rear wheel shaft 12. In this example, the first vibration unit 5 and the second vibration unit 6 of the front wheel side vibration exciter 1 with the front and rear wheels held on the front wheel shaft 11 and the rear wheel shaft 12 of the motorcycle M removed. Are connected to the front wheel shaft 11, and the rear wheel side vibration exciter 2 is connected to the rear wheel shaft 12 to perform a vibration test. In some cases, the rear-wheel side vibration exciter 2 cannot be directly connected to the rear-wheel shaft 12 as in the case of a saddle-type vehicle in which the rear-wheel side is driven by a drive shaft. In that case, although not shown, the rear wheel axle 12 is attached with a rim from which the tire is removed, and the rear wheel side vibration exciter 2 and the telescopic member 4 are attached to the rear wheel axle 12 via a bracket that wraps the rim. May be. As described above, when the excitation points are the front wheel shaft 11 and the rear wheel shaft 12, the front wheel side vibrator 1 and the rear wheel side vibration device 2 are directly connected to the front wheel shaft 11 and the rear wheel shaft 12, and some parts You may make it attach and vibrate indirectly via this.

The first vibration unit 5 is attached to the gantry B in a vertical direction so as to extend and contract, and one end is hinged to the first front wheel side actuator 51 and the other end is the front wheel shaft 11. And a connecting rod 52 that is rotatably connected to each other.

In this example, the first front wheel side actuator 51 is a telescopic hydraulic servo cylinder, which expands and contracts when pressure oil is supplied and discharged from a hydraulic source (not shown). It may be a pressure actuator or an electric actuator.

The connecting rod 52 has a rod shape, one end of which is hinged to the first front wheel side actuator 51, and the other end of the connecting rod 52 can be removably connected to the front wheel shaft 11 by hinge connection.

Therefore, when the first front wheel side actuator 51 expands and contracts, the front wheel shaft 11 is vibrated in the vertical direction in FIG. 1 via the connecting rod 52, and the front wheel shaft 11 is vibrated in the vertical direction. Since the connecting rod 52 is rotatably connected to the front wheel shaft 11 and the first front wheel side actuator 51, even if a vibration in the front-rear direction is applied to the front wheel shaft 11, the first front wheel side actuator is not affected by this vibration. By 51, the front wheel shaft 11 can be vibrated in the vertical direction.

The second vibration unit 6 is attached to the gantry B in a vertical direction and is extended and contracted, a second front wheel side actuator 61, a column 62 provided in the gantry B in a vertical direction, a column 62, A conversion link 63 that is rotatably connected to the two front wheel side actuator 61, one end is rotatably connected to the conversion link 63, and the other end is rotatably connected to both the connecting rod 52 and the front wheel shaft 11. The connecting rod 64 is provided.

The second front wheel side actuator 61 has a rotatable arm 61 a at the tip, and this arm 61 a is hinged to the conversion link 63. In this example, the second front wheel side actuator 61 is a telescopic hydraulic servo cylinder, which is expanded and contracted by supplying and discharging pressure oil from a hydraulic source (not shown). Or an electric actuator.

The support column 62 stands on the gantry B, and a substantially triangular conversion link 63 is rotatably attached to the tip thereof. In this case, the conversion link 63 is connected to the column 62 by a hinge connection in the vicinity of one apex thereof, and is attached to the column 62 in such a manner that only rotation about the hinge connection point is allowed.

The arm 61a of the second front wheel side actuator 61 is hingedly connected in the vicinity of the vertex other than the vertex connected to the column 62 of the conversion link 63. The connecting rod 64 has a rod shape, and one end of the connecting rod 64 is hinged to the vicinity of the remaining apex where the column 62 of the conversion link 63 and the second front wheel side actuator 61 are not connected. The other end of the connecting rod 64 can be detachably connected to the front wheel shaft 11 by hinge connection.

When the plane including the longitudinal axis of the motorcycle M and the axis of expansion and contraction of the first front wheel side actuator 51 is taken as a reference plane, each of the second front wheel side actuator 61, the conversion link 63 and the connecting rod 64 is on the reference plane. Only rotatably connected.

When the second front wheel side actuator 61 is extended, the conversion link 63 rotates clockwise at the hinge connection point to the support column 62 and the connecting rod 64 is pushed rightward, so that the front wheel shaft 11 is moved to the right in FIG. Can be driven in the direction. On the other hand, when the second front wheel side actuator 61 is contracted, the conversion link 63 rotates counterclockwise at the hinge connection point to the support column 62 and the connecting rod 64 is pulled leftward. Can drive in the middle left direction. That is, in the second vibration unit 6, the conversion link 63 and the support 62 constitute a bell crank mechanism, and the expansion / contraction motion of the second front wheel side actuator 61 is converted into the longitudinal motion of the motorcycle M to generate vibration. It can be transmitted to the front wheel shaft 11 as a point. The conversion link 63 has a triangular shape because it is advantageous in terms of strength, but may have a shape other than a triangular shape, such as an L shape.

Therefore, when the second front wheel side actuator 61 exhibits an expansion / contraction motion, the vertical expansion / contraction motion of the second front wheel side actuator 61 is converted into a back-and-forth reciprocation motion by the conversion link 63, and the front wheel shaft 11 is connected via the connecting rod 64. Can be vibrated by vibrating in the longitudinal direction. Since the connecting rod 64 is rotatably connected to the front wheel shaft 11 and the conversion link 63, even if vertical vibration is applied to the front wheel shaft 11, the second front wheel side actuator 61 does not affect the front wheel shaft 11 without being affected by this vibration. The wheel shaft 11 can be vibrated in the front-rear direction.

The rear wheel side vibration exciter 2 is attached to the gantry B in a vertical direction so that the rear wheel side actuator 21 can be expanded and contracted, and both the rear wheel side actuator 21 and the rear wheel shaft 12 are rotatable. And a connecting rod 22 for connecting the two.

In this example, the rear wheel side actuator 21 is a telescopic hydraulic servo cylinder, which expands and contracts by supplying and discharging pressure oil from a hydraulic source (not shown). It may be made into an electric actuator.

The connecting rod 22 is rod-shaped and has one end hinged to the rear wheel side actuator 21 and the other end removably connected to the rear wheel shaft 12 by hinge coupling.

When the rear wheel side actuator 21 expands and contracts, the rear wheel shaft 12 is vibrated in the vertical direction in FIG. 1 via the connecting rod 22, and the rear wheel shaft 12 is subjected to vertical vibration. Since the connecting rod 22 is rotatably connected to the rear wheel shaft 12 and the rear wheel side actuator 21, even if a vibration in the front-rear direction is applied to the rear wheel shaft 12, the rear wheel side actuator 21 does not affect the vibration. The rear wheel shaft 12 can be vibrated in the vertical direction.

Further, although not shown, each actuator 21, 51, 61 described above is inserted into the cylinder, a piston that is slidably inserted into the cylinder, and divides the cylinder into an expansion side chamber and a pressure side chamber, and the cylinder. A well-known hydraulic servo cylinder having an output rod coupled to the piston, and a direction switching valve for connecting one of the expansion side chamber and the pressure side chamber to a pump capable of supplying pressure oil and communicating the other to the tank. Yes. Each

actuator

21, 51, 61 can employ either a single rod type or a double rod type. Each

actuator

21, 51, 61 can be extended by supplying pressure oil to the expansion side chamber, and can be contracted by supplying pressure oil to the compression side chamber. In addition, each actuator 21, 51, 61 can realize an unloading state in which both chambers are connected to the tank and the supply of pressure oil is stopped, so that the load is not exerted and the external force causes free expansion and contraction. It has become. The specific configurations of the

actuators

21, 51, 61 are not limited to those described above, and other configurations can be adopted as long as the unloaded state can be realized. The

actuators

21, 51, 61 may be actuators that are electrically or pneumatically driven, and even in such a case, consideration is given so as to realize the unload state as described above.

Subsequently, the gantry B is provided with a regulating member 3 that is installed upright behind the motorcycle M. The restricting member 3 is disposed behind the motorcycle M and fixed to the mount B. Between the regulating member 3 and the rear wheel shaft 12, there is provided a telescopic member 4 that is rotatably connected to both.

In this example, as shown in FIG. 2, the elastic member 4 includes a cylinder 41, a piston 42 that is slidably inserted into the cylinder 41 and divides the cylinder 41 into an expansion side chamber 44 and a pressure side chamber 45, A piston rod 43, which is movably inserted into the cylinder 41 and connected to the piston 42, an extension side opening / closing valve 46 for communicating and blocking the extension side chamber 44 and the outside of the cylinder 41, a pressure side chamber 45 and the outside of the cylinder 41 are provided. A pressure-side on-off valve 47 that communicates and shuts off is provided, and a pneumatic cylinder device that uses air as a working medium filled in the cylinder 41 is provided. The telescopic member 4 is attached to the cylinder 41 by connecting the cylinder 41 to the restricting member 3 and the piston rod 43 to the rear wheel shaft 12.

In this example, the valve opening degree of the expansion side opening / closing valve 46 and the pressure side opening / closing valve 47 can be adjusted in the open state. When the valve opening degree is maximized, the air to the expansion side chamber 44 and the pressure side chamber 45 is increased. The entry and exit are almost done without resistance.

When the expansion side opening / closing valve 46 and the pressure side opening / closing valve 47 are opened to the maximum extent, the expansion / contraction member 4 places the expansion side chamber 44 and the pressure side chamber 45 in communication with the outside of the cylinder 41, thereby preventing air from entering and exiting the cylinder 41. It becomes a free mode which expands and contracts freely without exhibiting a damping force by an external force.

If the expansion side opening / closing valve 46 and the pressure side opening / closing valve 47 are opened but the valve opening is reduced, the expansion side chamber 44 and the pressure side chamber 45 communicate with the outside of the cylinder 41, but resistance to the flow of air entering and exiting the cylinder 41 is increased. Given. In this state, the expansion / contraction member 4 is in a damper mode that exhibits a damping force that prevents the expansion / contraction when the expansion / contraction operation is performed by an external force. If the damper mode is unnecessary, an on-off valve that does not have a function of adjusting the valve opening may be used for the extension-side on-off valve 46 and the pressure-side on-off valve 47.

Further, when the expansion side opening / closing valve 46 and the pressure side opening / closing valve 47 are closed, the communication between the expansion side chamber 44 and the pressure side chamber 45 and the outside of the cylinder 41 is cut off. In this state, when the expansion / contraction member 4 is expanded / contracted by an external force, it acts as a gas spring and exhibits a resilient force repelling expansion / contraction.

As described above, the telescopic member 4 configured in this way is hinge-connected to the regulating member 3 that is fixedly installed on the gantry B, and is hinge-connected to the rear wheel shaft 12 and the connecting rod 22. It is connected to be rotatable. Further, when the

actuator

21, 51, 61 is driven so that the stroke position becomes a neutral position that is the stroke center, and the motorcycle M is set to the vibration center in the vibration test, the telescopic member 4 is connected to the rear wheel shaft 12. Both are connected so that it may become a horizontal posture between the control members 3. The stroke position of the expansion / contraction member 4 in this state is the neutral position, and during the vibration test, the expansion / contraction member 4 strokes to both sides of the neutral position. And even if each actuator 21, 51, 61 strokes the maximum stroke amount allowed during a normal vibration test other than the brake vibration test, the neutral position of the expansion / contraction member 4 does not extend or contract most. The stroke amount on both sides of the expansion and contraction is designed. Therefore, when the expansion / contraction member 4 is set to the free mode or the damper mode, during the normal vibration test, the expansion / contraction member 4 does not become the maximum body and becomes a rigid body with respect to further expansion, and the maximum contraction Therefore, the situation does not become rigid with respect to further contraction. Therefore, the telescopic member 4 does not cause a situation in which the vibration in the front-rear direction of the rear wheel shaft 12 of the motorcycle M is forcibly stopped during a normal vibration test.

The stroke amount from the neutral position of the telescopic member 4 to the contraction direction is the maximum stroke in the direction in which the second vibration unit 6 moves the front wheel shaft 11 backward from the neutral position of the second front wheel side actuator 61. It is designed to be shorter than the amount. Therefore, when the expansion / contraction member 4 is set to the free mode or the damper mode and the second front wheel side actuator 61 is stroked from the neutral position in the extending direction, the expansion / contraction member 4 is in the most contracted state with the piston 42 bottoming on the cylinder 41. . The expansion / contraction member 4 contracts most when contracted by a predetermined amount or more from the neutral position in the expansion / contraction member 4, but the predetermined amount, which is a stroke amount in the contraction direction from the neutral position, is the expansion / contraction member 4 during a normal vibration test. It is set to an amount longer than the maximum stroke amount in the contraction direction from the neutral position. The predetermined amount is set to be shorter than the maximum stroke amount from the neutral position of the second vibration unit 6. If it does in this way, the expansion-contraction member 4 can be surely contracted most, and the expansion-contraction member 4 exhibits the stopper function which becomes a rigid body with respect to the further contraction. Therefore, reliable execution of the brake vibration test is guaranteed. When the second front wheel side actuator 61 is installed on the rear side on the right side in FIG. 1 with respect to the column 62 and the conversion link 63 is also attached to the right side in FIG. The wheel shaft 11 is moved rearward. In this case, the maximum amount of the second vibrating portion 6 when the stroke amount from the neutral position of the telescopic member 4 to the contraction direction is stroked from the neutral position of the second front wheel side actuator 61 to the contraction direction. A predetermined amount may be set in relation to the stroke amount.

Thus, in a state where the telescopic member 4 functions as a stopper, the telescopic member 4 becomes a rigid body even if the rear wheel shaft 12 tries to move to the rear side in FIG. 1, and the regulating member 3 receives the load from the rear wheel shaft 12 side and the rear. The rearward movement of the wheel shaft 12 is restricted.

As described above, in the vibration testing machine T, the front wheel side vibrator 1 can vibrate in two directions, the vertical direction and the front and rear direction, on the front wheel shaft 11 side, and the rear wheel side vibrator 2 on the rear wheel shaft 12 side. Can be uniaxially excited in the vertical direction. In a normal vibration test, the elastic member 4 is set to a free mode or a damper mode, and the front-wheel side vibration exciter 1 and the rear-wheel side vibration exciter 2 give vibration to the motorcycle M as a straddle vehicle for test vibration. To obtain the transfer function. After the transfer function is obtained in this way, the vibration tester T can load the motorcycle M with a vibration that realizes the acceleration obtained in the actual vehicle and perform a normal vibration test.

During the vibration test, the expansion / contraction member 4 expands / contracts with respect to the stroke of each actuator 21, 51, 61, so that the vibration is forcibly stopped by the expansion / contraction member 4 or the motorcycle M is forced to vibrate in the front-rear direction. The vibration test can be carried out smoothly without any occurrence of load. And when the expansion-contraction member 4 has a stroke length that does not extend or contract most with the stroke amount from the neutral position during the vibration test, the vibration of the motorcycle M is forcibly stopped or the vibration in the front-rear direction is suppressed during the vibration test. It is possible to surely prevent the occurrence of a forced load.

Further, when performing a brake vibration test for applying a vibration or load applied to the motorcycle M as a saddle-riding vehicle at the time of the jackknife phenomenon, the front wheel shaft 11 is stroked rearward by the front wheel-side vibration exciter 1 and the telescopic member 4 is moved. Make the most contraction. When the expansion / contraction member 4 is contracted to the maximum, the expansion / contraction member 4 becomes rigid with respect to further contraction, and the regulating member 3 receives a load. From this state, when the front wheel side vibration exciter 1 further strokes to move the front wheel shaft 11 rearward, the rear wheel shaft 12 is restricted from moving rearward, so the front wheel shaft 11 and the rear wheel shaft 12 approach each other, A compressive load acts on the motorcycle M. Thus, in the vibration testing machine T, a compression load that causes the front wheel shaft 11 and the rear wheel shaft 12 of the motorcycle M to approach each other can be applied to the motorcycle M, so that the motorcycle M is driven by the jackknife phenomenon. A state in which a heavy load is applied to the front wheel shaft 11 can be realized, and a good brake vibration test can be performed.

Further, when the motorcycle M as a saddle-riding vehicle is attached to or detached from the vibration tester T, the actuators 21 of the front wheel side vibrator 1 and the rear wheel side vibrator 2 are set with the telescopic member 4 in a free mode or a damper mode. , 51, 61 are stopped and unloaded. When the

actuators

21, 51, 61 are unloaded, the motorcycle M is in a state where the telescopic member 4 can be expanded and contracted, so that the connecting

rods

22 and 64 fall down to the right in FIG. Then, the motorcycle M is lowered to a base position where it cannot move downward. At this base position, an allowance is provided in the stroke so that the expansion / contraction member 4 does not extend the most, and consideration is given so that a load in the front-rear direction does not act on the motorcycle M. Therefore, the motorcycle M can be attached to and detached from the vibration tester T in a state where the front wheel side vibrator 1 and the rear wheel side vibrator 2 are unloaded and the motorcycle M is disposed at the base position. Therefore, the attaching / detaching workability of the motorcycle M as the saddle riding vehicle to the vibration testing machine T is improved, and the attaching / detaching work in the unloaded state of the front wheel side vibrator 1 and the rear wheel side vibrator 2 is performed. So work safety is improved.

The vibration testing machine T according to the present invention includes a front wheel side vibrator 1 capable of exciting the front wheel shaft 11 of the motorcycle M, a rear wheel side vibrator 2 capable of vibrating the rear wheel shaft 12, and a rear wheel shaft 12. The elastic member 4 is provided between the restricting member 3 and can be expanded and contracted, and is expanded and contracted when contracted by a predetermined amount from the neutral position. Therefore, according to the vibration testing machine T of the present invention, the motorcycle M can be attached and detached at the base position without applying the forced vibration to the motorcycle M while enabling the brake vibration test.

When performing a vibration test of a scooter or the like in which the vehicle body frame and the rear unsprung structure (structure including the engine, drive system components, and rear wheels) are coupled via an elastic body, the expansion / contraction member 4 should be When contracted, resonance between the main body frame and the rear unsprung structure is suppressed. When the test excitation is performed in this way to obtain the transfer function, resonance between the main body frame and the rear unsprung structure is suppressed, the convergence of the iterative correction procedure is quick, and the time required for the test excitation can be shortened.

In addition, if the maximum stroke amount in the contraction direction is made smaller than the maximum stroke amount in the extension direction from the neutral position in the vibration test of the expansion / contraction member 4, the total length of the cylinder 41 in the expansion / contraction member 4 can be shortened, and the cost of the expansion / contraction member 4 can be reduced. It can be reduced and the weight can be reduced. Moreover, since the lightweight piston rod 43 side is vibrated when the cylinder 41 side of the expansion / contraction member 4 is connected to the regulating member 3, energy consumption in the front wheel side vibrator 1 and the rear wheel side vibrator 2 is reduced, Vigorous vibrations do not need to be input to the accessories such as the extension side opening / closing valve 46 and the pressure side opening / closing valve 47.

Further, in this example, since the expansion / contraction member 4 has a damper mode and can exhibit a damping force during expansion / contraction, a force is generated to suppress this against vibration in the front-rear direction on the rear wheel shaft 12 side. The situation can be reproduced and a vibration test closer to actual vehicle driving can be performed.

Furthermore, when the expansion / contraction member 4 has a free mode that does not exhibit a damping force during expansion / contraction, the front wheel side vibrator 1 and the rear wheel side vibrator 2 do not suppress vibrations applied to the saddle vehicle. Vibration test can be performed without energy loss.

Further, in this example, the expansion / contraction member 4 can also function as a gas spring when the expansion side opening / closing valve 46 and the pressure side opening / closing valve 47 are closed, so that the elastic force received from the tire against the vibration in the front-rear direction on the rear wheel shaft 12 side. The vibration test that takes into account can be performed, and the vibration test closer to the actual vehicle can be performed.

It should be noted that the vibration direction of the front wheel shaft 11 in the front wheel side vibration exciter 1 is not limited as long as it can be vibrated at least in the front-rear direction and the vertical direction of the motorcycle M which is a straddle vehicle. Therefore, the excitation directions of the first front wheel side actuator 51 and the second front wheel side actuator 61 are different from each other in a plane including two axes of the vertical direction axis of the saddle riding vehicle and the horizontal direction axis orthogonal thereto. It only has to be. That is, it is not always necessary that the vibration direction of the front wheel shaft 11 of the first front wheel side actuator 51 is the vertical direction and the vibration direction of the front wheel shaft 11 of the second front wheel side actuator 61 is the horizontal direction. Here, in the case of the motorcycle M, the front fork 14 is mounted with a caster angle with respect to the vehicle body 13 and with its lower end directed forward. Therefore, in the front-wheel side shaker 1, the vibration direction of the first vibration unit 5 is set to the expansion / contraction direction of the front fork 14, and the vibration direction of the second vibration unit 6 is set to the expansion / contraction direction of the front fork 14. The directions may be orthogonal to each other. In this way, when the transfer function is obtained by repeating the test excitation as preparation for performing the vibration test, the convergence of the iterative correction procedure is accelerated and the time for obtaining the transfer function can be shortened.

Further, when the straddle vehicle is not a two-wheeled vehicle but a two-wheeled three-wheeled vehicle, it is only necessary to provide two front-wheel side vibrators 1, and in the case of a two-wheeled three-wheeled vehicle, the rear-wheel side vibrator 2 Two telescopic members 4 may be provided to be connected to each of the two rear wheel shafts. Similarly, in the case of a four-wheeled vehicle, two front wheel side vibrators 1 and two rear wheel side vibrators 2 are provided, and two expansion members 4 may be provided to be connected to each of the two rear wheel shafts. . Further, the number of the elastic members 4 installed on one rear wheel shaft 12 may be plural.

Note that, when the expansion / contraction member 4 is a pneumatic cylinder device, air is supplied and discharged inside and outside the cylinder 41 even when the free mode, the damper mode, and the stopper function at the most contraction are exhibited. is there. Therefore, it is not necessary to install a power source, a tank, or the like on the expansion / contraction member 4, and the cost of the vibration tester T is reduced and the weight is reduced. Moreover, the free mode and the damper mode in the telescopic member 4 can be realized with a simple configuration. Thus, although there exists an advantage which makes the expansion-contraction member 4 a pneumatic cylinder apparatus, the structure of the expansion-contraction member 4 is not restricted to this, A hydraulic cylinder apparatus may be used, and when a damper mode is required, a weight The rotary inertia damper device may use a moment of inertia caused by the rotation of as a damping force. Furthermore, the telescopic member 4 may be an electromagnetic damper device that uses an electromagnetic force as a damping force.

When the telescopic member 4 is a hydraulic cylinder device, for example, as shown in FIG. 3, the cylinder 71 and the cylinder 71 are slidably inserted into the cylinder 71 to divide the cylinder 71 into an extension side chamber 74 and a pressure side chamber 75. It is preferable to include a piston 72, a piston rod 73 that is movably inserted into the cylinder 71 and connected to the piston 72, and a lock mechanism 76 that disables contraction.

In this case, since the expansion / contraction member 4 is a single rod type hydraulic cylinder device, a tank 77 communicating with the expansion side chamber 74 is provided, and the piston rod 73 enters and exits into the cylinder 71, so that the cylinder 71 is excessive or insufficient. The hydraulic oil is supplied and discharged by a tank 77.

In this example, the lock mechanism 76 is an open / close valve provided in a passage 72 a that communicates the expansion side chamber 74 provided in the piston 72 and the pressure side chamber 75. In a state where the lock mechanism 76 communicates with the expansion side chamber 74 and the compression side chamber 75, when the expansion and contraction member 4 expands and contracts, the hydraulic oil can freely move between the expansion side chamber 74, the compression side chamber 75 and the tank 77. It becomes a free mode that can expand and contract freely without resistance. In the state where the lock mechanism 76 blocks the expansion side chamber 74 and the compression side chamber 75, when the expansion / contraction member 4 contracts, the hydraulic oil in the compression side chamber 75 has no place to go, so the expansion / contraction member 4 cannot contract any further. It becomes a rigid body and demonstrates its stopper function.

In this way, when the expansion / contraction member 4 is used as a hydraulic cylinder device and the lock mechanism 76 is provided, if the expansion / contraction member 4 cannot be contracted, the second front wheel side actuator 61 does not need to bring the expansion / contraction member 4 into the most contracted state, and the brake vibration A test can be conducted. Therefore, it becomes easier to perform a brake test, and energy consumption in the front-wheel side vibrator 1 can be reduced.

Note that the lock mechanism 76 may be configured to disable strokes on both sides of the expansion / contraction member 4. When the lock mechanism 76 can suppress the contraction without contracting the expansion / contraction member 4 on both sides of expansion / contraction, resonance between the main body frame and the rear unsprung structure is effective in obtaining a transfer function by a test excitation such as a scooter. This makes it possible to converge the iterative correction procedure faster and further reduce the time required for the test excitation. Further, the configuration in the case where the telescopic member 4 is a hydraulic cylinder device is not limited to the above.

The preferred embodiments of the present invention have been described above in detail, but modifications, changes and modifications can be made without departing from the scope of the claims.

This application claims priority based on Japanese Patent Application No. 2015-152972 filed with the Japan Patent Office on July 31, 2015, the entire contents of which are incorporated herein by reference.

Claims

A vibration testing machine,
A front wheel side vibration exciter capable of exciting the front wheel shaft of the saddle riding vehicle in the vertical direction and the front and rear direction;
A rear wheel side vibration exciter capable of exciting the rear wheel shaft of the saddle vehicle in the vertical direction;
A regulating member fixedly arranged behind the saddle riding vehicle;
A vibration tester comprising: a telescopic member provided between a rear wheel shaft of the straddle vehicle and the restricting member and capable of extending and contracting and being compressed most when contracted by a predetermined amount from a neutral position.
The vibration testing machine according to claim 1,
A vibration tester characterized in that the elastic member can exhibit a damping force during expansion and contraction.
The vibration testing machine according to claim 1,
The vibration tester characterized by having a free mode in which the elastic member does not exhibit a damping force during expansion and contraction.
The vibration testing machine according to claim 1,
The vibration tester is characterized in that the stretchable member has a stroke length that does not extend or contract most with a stroke amount from the neutral position during a vibration test.
The vibration testing machine according to claim 1,
The stroke length to the rear wheel side in the front wheel side vibrator is set to be larger than the stroke length in the contraction direction from the neutral position of the telescopic member,
In the brake vibration test, the vibration tester is characterized in that the expansion member is contracted to the maximum.
The vibration testing machine according to claim 1,
The elastic member is
A cylinder,
A piston that is slidably inserted into the cylinder and divides the cylinder into an extension side chamber and a pressure side chamber;
A piston rod movably inserted into the cylinder and coupled to the piston;
An extension side on-off valve for communicating and blocking the extension side chamber and the outside of the cylinder;
A pressure side on-off valve that communicates and blocks the pressure side chamber and the outside of the cylinder;
A vibration tester characterized in that the working medium is air.
The vibration testing machine according to claim 1,
The elastic member is
A cylinder,
A piston that is slidably inserted into the cylinder and divides the cylinder into an extension side chamber and a pressure side chamber;
A piston rod movably inserted into the cylinder and coupled to the piston;
A vibration tester comprising a lock mechanism that disables contraction.
The vibration testing machine according to claim 6,
The vibration tester characterized in that the cylinder of the telescopic member is connected to the restricting member.