JP2004025991A - Movable load testing vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a movable load testing vehicle for detecting an exciting load on a track or a ground and quantitative seizure of the influences of vibration on the track or the ground by forming an actual train in a simulative structure. <P>SOLUTION: A loading frame 96 is elevatably supported on a vehicle body frame 91 via a linear guide 97 so that it can be elevated with a motor 98 and constrained at a test position by a lock cylinder 112. A truck frame 118 is fixed to the loading frame 96, a bearing 120 is supported on the truck frame 118 via a shaft spring 119 and a loading wheel 122 is mounted on the bearing 120 via a wheel shaft 121. A wheel load vibrating device 123 is mounted on the truck frame 118 for granting the loading wheel 122 a load in the vertical direction and a lateral pressure vibrating device 124 is mounted thereon for granting the loading wheel 122 a load in the direction of a rotating shaft. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mobile loading test vehicle that simulates train running, excites a track, and detects a vibrating load acting on the track to evaluate the vibration of the track and the track material and structure. .
[0002]
[Prior art]
Since the use of existing facilities is premised on increasing the speed of railway rolling stock, it is necessary to sufficiently consider the effect of speed improvements from the track to the ground. As an item to consider the influence of the track on the ground, it is conceivable to finally evaluate the ground vibration accompanying the train running and to devise the vehicle side and the track side so as not to deteriorate this ground vibration. . As a device on the vehicle side, there is a method in which the vehicle is driven by changing the axle load or the shaft spring characteristics of the vehicle. On the other hand, as a device on the track side, the actual vehicle travels by laying a track with a changed track spring coefficient.
[0003]
As a conventional mobile loading test vehicle, for example, there is one disclosed in Japanese Patent Application Laid-Open No. 2001-241946. The "track characteristic test vehicle" disclosed in this publication is provided with a sub-frame under a vehicle body via a spring device, a bogie frame provided through a roller under the sub-frame, and a roller under the bogie frame. A support frame is provided through, a lifting cylinder is erected between the vehicle body and the support frame, and a loading wheel and a loading cylinder are provided on the support frame, while the bogie frame and the loading wheel are connected with a lever, The left and right loading cylinders are provided between the bogie frame and the intermediate load.
[0004]
Therefore, a vertical load can be applied to the rail via the loading wheel by the loading cylinder while the vehicle is traveling, and a lateral load can be applied to the rail via the loading wheel by the left and right loading cylinders.
[0005]
[Problems to be solved by the invention]
By the way, in order to apply a load to the rail via the loading wheel by the loading cylinder, the upper limit of the load applied to the rail by the loading cylinder is determined by the weight of the mounting member of the loading cylinder. It is desirable that the loading cylinder be installed on the vehicle body side so that the entire body weight acts. On the other hand, when the loading cylinder is fixed to the vehicle body, elastic vibration of the vehicle body acts depending on the vibration frequency, and a predetermined load cannot be applied. The above-mentioned conventional "track characteristic test vehicle" has a problem that it is difficult to perform a test by applying various kinds of load to the track.
[0006]
The present invention has been made to solve such a problem, and a mobile loading test vehicle capable of performing various kinds of loading loads on a track and capable of quantitatively understanding an influence on a track and the ground is provided. The purpose is to provide.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a mobile loading test vehicle according to the first aspect of the present invention has a vehicle body frame having wheels that can travel along a track, an elevating frame supported on the vehicle body frame so as to be able to move up and down, Restraint means for restraining the elevating frame from being lifted and lowering with respect to the body frame; vibrating means mounted on the elevating frame to vibrate the track; and the track when the track is driven by the vibrating means And a detecting means for detecting a load acting on the vehicle.
[0008]
In the mobile loading test vehicle according to the invention of claim 2, the vibration generating means includes a loading wheel capable of rolling along the track, and a wheel load exciting device that applies a vertical load to the loading wheel. And a lateral pressure exciter for applying a load in the direction of the rotation axis to the loaded wheel.
[0009]
In the mobile loading test vehicle according to the third aspect of the present invention, a bearing is mounted on the elevating frame via a shaft spring, and the loaded wheel is supported on the bearing via a wheel shaft. The lateral pressure exciter applies an axial load to the wheel axle while applying a vertical load to the wheel axle.
[0010]
In the mobile loading test vehicle according to the fourth aspect of the present invention, the lifting frame is supported by the body frame by a linear guide so as to be able to move up and down, and an upper standby position and a lower position are set by lifting means mounted on the body frame. It is characterized by being movable to a test position.
[0011]
In the mobile loading test vehicle according to the invention of claim 5, a separating mechanism is provided between the lifting / lowering means and the lifting / lowering frame so that the lifting / lowering frame can be raised / lowered by a predetermined stroke with respect to the vehicle body frame. Is characterized in that the function of the separating mechanism is stopped and the vehicle body frame and the lifting frame can be integrally connected.
[0012]
In the mobile loading test vehicle according to the invention of claim 6, the separating mechanism is provided in one of the elevating means side and the elevating frame side, and is provided in the other and is movable in the elongate hole. And the locking means is a lock cylinder having a lock piece for restraining the movement of the connecting shaft in the elongated hole.
[0013]
In a mobile loading test vehicle according to a seventh aspect of the present invention, the lifting frame is provided with a load adjusting means for adjusting the excitation load by the excitation means.
[0014]
In the mobile loading test vehicle according to the invention of claim 8, the load adjusting means is an air spring installed between the vehicle body frame and the elevating frame, and according to an air pressure supplied to and discharged from the air spring. The weight of the lifting frame is adjusted.
[0015]
In the mobile loading test vehicle according to the ninth aspect of the present invention, the load adjusting means is a weight mounted on the lifting frame, and adjusts the weight of the lifting frame according to the mounting load of the weight. And
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0017]
FIG. 1 is a front view of a lower portion of a vibration excavator in a mobile loading test vehicle according to an embodiment of the present invention, FIG. 2 is a plan view of a lower portion of a vibration excavator of this embodiment, and FIG. 4 is a sectional view taken along the line IV-IV of FIG. 2, FIG. 5 is a sectional view taken along the line VV of FIG. 4, FIG. 6 is a detail of a VI portion of FIG. FIG. 8 is a sectional view taken along the line VII-VII of FIG. 4 showing a mechanism for changing the suspension rigidity by the shaft spring, FIG. 8 is a front view of a main part of the loading truck of this embodiment, FIG. XX section, FIG. 11 shows the XI-XI section of FIG. 10, FIG. 12 shows the outline of the lateral pressure loading mechanism in the loading truck, FIG. 13 shows the details of the XIII portion of FIG. 10 showing the loading frame locking mechanism, and FIG. The outline of the mobile loading test vehicle of this embodiment is shown.
[0018]
As shown in FIG. 14, the mobile loading test vehicle according to the present embodiment includes a towing vehicle 11, equipment-equipped vehicles 12, 13, a traveling vehicle 14, a loading vehicle 15, and a vibrating vehicle 16. The towing vehicle 11 is capable of moving forward and backward when a driver gets on the vehicle and performs a driving operation. The equipment-equipped vehicles 12 and 13 can be run by being towed by the towing vehicle 11, the equipment-equipped vehicle 12 is equipped with hydraulic sources of various equipment, and the equipment-equipped vehicle 13 is equipped with control devices for various equipment. . The traveling vehicle 14, the loading vehicle 15, and the exciter 16 can be run by being pulled by the towing vehicle 11. As will be described later, the loading vehicle 15 vibrates the track vertically and horizontally while traveling. The vibration generating means is mounted, and the vibration generating carriage 16 is mounted with a vibration generating means for vibrating the track in a vertical direction while the vehicle is stopped.
[0019]
In this case, the traveling vehicle 14, the loading vehicle 15, and the vibrating vehicle 16 are separately manufactured, and a flange portion 14 a formed at a rear end portion of the traveling vehicle 14 and a flange portion 15 a formed at a front end portion of the loading vehicle 15. And a flange 15b formed at the rear end of the loading cart 15 and a flange 16a formed at the front end of the vibrating cart 16 are detachably attached by bolts. Has been concluded. Accordingly, by detaching the exciter bogie 16 from the loading cart 15 and connecting it to another self-propelled vehicle, the exciter bogie 16 can be used by traveling independently.
[0020]
On the other hand, the track 17 is laid on the ground 18, but in general, a ballast ballast is laid on the roadbed, a number of sleepers are arranged thereon, and a pair of left and right rails is laid so as to bridge over the sleepers. Therefore, the description of the detailed laying structure of the track 17 is omitted.
[0021]
Here, the detailed structures of the traveling vehicle 14, the loading vehicle 15, and the vibration oscillating vehicle 16 will be described. Note that the traveling vehicle 14, the loading vehicle 15, and the oscillating vehicle 16 have a structure which is substantially symmetrical in the left and right directions, and only one will be described, and the other will be denoted by the same reference numeral and redundant description will be omitted.
[0022]
In the traveling vehicle 14, a long bogie frame 23 is attached to a lower portion of the body frame 21 via an air spring 22 and a front and rear lower portion of the bogie frame 23 is provided with a shaft spring 24 and a shaft damper 25. Bearings 26 are supported via the bearings, and running wheels 27 are rotatably mounted on the front and rear bearings 26.
[0023]
As shown in FIGS. 1 to 5, a pair of left and right bogie frames 33 that are long in the front and rear directions are respectively mounted on left and right lower portions of a body frame 31 of the vibration bogie 16, as shown in FIGS. Are connected by a connection frame 34. A bearing 36 is supported at the front lower portion of each bogie frame 33 via front and rear shaft springs 35, and a shaft damper 37 is interposed between the bogie frame 33 and the bearing 36. The left and right bearings 36 rotatably support a wheel shaft 38 therethrough, and running wheels 39 are fixed to left and right ends of the wheel shaft 38.
[0024]
An inertia mass 42 is supported at a lower rear portion of each bogie frame 33 via front and rear shaft springs 41. The inertial mass 42 is configured such that a spring receiving member 43 for the left and right shaft springs 41 and an inertial mass main body 44 are integrally connected by a connecting frame 45. A weight 46 having a predetermined weight is fixed on the inertial mass main body 44 with a plurality of bolts 47, and a weight 48 having a predetermined weight is mounted on an intermediate portion and can be fixed with a plurality of bolts 49. The load can be adjusted according to the requirements. A shaft damper 50 is interposed between the left and right bogie frames 33 and the respective spring receiving members 43 of the inertial mass 42.
[0025]
An exciter 51 is provided to excite the track 17 in the connection frame 45 adjacent to the left and right spring supports 41 in the inertial mass 42. That is, the vertical vibration actuator 52 is fixed to the connection frame 45, and a mounting jig 54 is fixed to a tip end of a driving rod 53 extending downward from the actuator 52. The loading jig 55 is mounted. The lower surface of the loading jig 55 that is in contact with the track 17 has an arc shape concentric with the traveling wheel 39 and has a substantially similar cross-sectional shape to the traveling wheel 39. It is detachable by being inserted into and bolted. The mounting jig 54 is provided with a load cell 56 as detecting means for detecting a load acting on the track 17.
[0026]
A male screw 57 is formed on the outer peripheral portion of the mounting jig 54, while a female screw portion 58 is formed on the connection frame 45. When the loading jig 55 is raised, the male screw 57 of the mounting jig 54 is By screwing into the female screw portion 58 of the connecting frame 45, the loading jig 55 (the mounting jig 54) can be temporarily fixed at the raised position (jig locking means).
[0027]
Accordingly, the vibrating device 51 drives the driving rod 53 by the actuator 52, and presses the loading jig 55 via the mounting jig 54 against the track 17 in the vertical direction, thereby causing the track 17 to vibrate. At this time, the vibration generated by the load cell 56 on the track 17 can be detected as a wheel load.
[0028]
Further, front and rear housings 59 having a box shape are fixed to the connection frame 45 in front and rear of the vibration device 51, respectively. Each of the housings 59 is open at the bottom, and a lifting frame 61 is fitted inside the lifting frame 61 via a liner 60 so that the traveling assist wheel 63 can rotate freely via a wheel shaft 62 to each lifting frame 61. It is installed. A screw shaft 64 is screwed into the upper portion of the housing 59 along the vertical direction. An operation handle 65 is attached to the upper end of the screw shaft 64, while the lower end of the screw shaft 64 is connected to the lifting frame 61. Have been.
[0029]
In this case, on the left and right sides of the inertial mass 42, a traveling auxiliary wheel 63 is disposed before and after the vibration generating device 51, and a shaft spring 41 is disposed on the outer side. The wheel 63 and the shaft spring 41 are juxtaposed in a substantially horizontal direction.
[0030]
Therefore, when the elevating frame 61 is lowered to the lowermost position with respect to the housing 59, the traveling auxiliary wheels 63 can contact the track 17 and roll, and drive the actuator 52 of the vibration generator 51 described above. When the loading jig 55 is brought into contact with the track 17, the operating handle 65 is rotated to raise the lifting frame 61 with respect to the housing 59, and the traveling assist wheel 63 is positioned at the uppermost position to be separated from the track 17. Can be.
[0031]
In order to clearly explain the positional relationship between the vibration generating device 51, the traveling auxiliary wheels 63, and the shaft springs 41 and the operation thereof, in FIG. 4 and FIG. 63 is lowered, the exciter 51 on the left side in the traveling direction is lowered, and the driving assist wheel 63 is raised.
[0032]
By the way, in the exciter 16, the air spring 32 and the shaft springs 35 and 41 are applied as suspensions. However, the running characteristics can be adjusted by changing the suspension rigidity (air spring rigidity, shaft spring rigidity). A spring killing mechanism that can stop at least one of the functions of the air spring 32 and the shaft springs 35 and 41 is provided.
[0033]
A pair of left and right and front and rear guide rails 66 are fixed to a lower portion of the body frame 31 in a direction orthogonal to the traveling direction of the vibration excavation truck 16, and a slide guide 67 is movably fitted to each of the guide rails 66. A U-shaped slide block 68 having a tapered surface is fixed to the slide guide 67. Hydraulic cylinders 69 are provided vertically below the body frame 31 so as to correspond to the respective guide rails 66, and the distal end of the drive rod 70 is connected to the slide block 68. On the other hand, a fixed block 71 is fixed to the upper part of the bogie frame 33, and a locking projection 72 having a tapered surface on which the slide block 68 can be locked is formed at the tip. An alignment guide 73 is fixed to the lower part of the body frame 31 so as to hang down.
[0034]
Therefore, an air source is connected to the air spring 32 via an air supply / discharge pipe having a flow control valve (not shown). When the air in the air spring 32 is discharged by adjusting the flow control valve, the bogie frame The body frame 31 descends with respect to 33. At this time, the body frame 31 descends while being centered by the guide 73 for alignment being guided by the fixed block 71. When the hydraulic cylinder 69 is extended and the slide guide 67 is advanced along the guide rail 66 in this state, the slide block 68 is locked by the locking portion 72 of the fixed block 71, and the body frame is By constraining 31 integrally, the suspension function of the air spring 32 can be stopped and the suspension rigidity can be increased.
[0035]
As shown in FIGS. 4 and 7, at the rear of the bogie frame 33, each shaft spring 41 is supported by an upper seat 74 whose upper end is fixed to the lower surface of the bogie frame 33, and whose lower end is formed by an inertial mass. The supporting member 42 is supported by a lower receiving seat 75 fixed to the spring receiving member 43. A support plate 76 is fixed to a lower portion of the spring receiving member 43. A cylinder 78 in which a piston 77 on a cylinder is movably fitted is fixed to the support plate 76. A spring 79 urges the piston 77 upward with respect to the cylinder 78. Then, a support rod 81 penetrates into a support portion 80 hanging down from the upper seat 74 to the center of the shaft spring 41, the upper end portion is connected to the bogie frame 33, and the lower portion passes through the cylinder 78 and the piston 77. A stopper 82 is mounted on the end so as to be adjustable in position.
[0036]
Therefore, when hydraulic pressure is supplied between the piston 77 and the cylinder 78, the piston 77 descends against the cylinder 78 fixed to the support plate 76 against the compression spring 79, but the piston 77 contacts the stopper 82. When they come into contact with each other, the movement is restricted, and the cylinder 78 starts to move up with respect to the piston 77. Then, the support plate 76 and the spring receiving member 43 integral with the cylinder 78 are raised, so that the lower receiving seat 75 crushes the shaft spring 41, thereby stopping the suspension function of the shaft spring 41 and increasing the suspension rigidity. Can be.
[0037]
In the description of the vibration oscillating vehicle 16, a piston 77, a cylinder 78, a compression spring 79, a support rod 81, a stopper 82, and the like are provided as a spring killing mechanism for stopping the function of the shaft spring 41 as a suspension of the traveling assist wheel 63. However, this spring killing mechanism is also mounted on the shaft spring 35 as a suspension for the traveling wheels 39, and by operating them in synchronization, the suspension rigidity of the entire exciter bogie 16 is changed to improve traveling characteristics. Can be adjusted.
[0038]
On the other hand, in the loading cart 15, as shown in FIGS. 8 to 11, a storage recess 92 is provided at the center of the body frame 91, and three mounts 93 are installed at the upper part. A plurality of guide rails 95 along the vertical direction are fixed. A hollow box-shaped loading frame 96 is disposed in the storage recess 92 of the body frame 91, and a plurality of linear guides 97 fixed to the front end and the rear end are movably fitted to the respective guide rails 95. I have.
[0039]
An electric motor 98 is mounted at the center of the gantry 93. An output shaft 99 of the electric motor 98 is connected to a first gear box 100, connected to a second gear box 102 via two connecting shafts 101, and A worm gear 104 is fixedly connected to the two connection shafts 103. A worm wheel 105 is rotatably supported on all sides of the gantry 93, and the worm gears 104 are engaged with each other. An elevating screw shaft 106 with which the worm gear 104 is screwed extends downward. On the other hand, hanging members 107 are fixed to four sides of the upper surface of the loading frame 96, and the lower end of the lifting screw shaft 106 and the upper end of the hanging member 107 are connected by a connecting link 108.
[0040]
In this case, as shown in detail in FIG. 13, the lower end of the lifting screw shaft 106 and the upper end of the connecting link 108 are connected by the connecting shaft 109, while the lower end of the connecting link 108 and the upper end of the hanging member 107 are connected. Is that the connection shaft 111 fixed to the connection link 108 is fitted into the long hole 110 formed in the hanging member 107, and is connected so as to be movable by a predetermined stroke. A lock cylinder 112 is fixed to the upper surface of the loading frame 96 adjacent to the hanging member 107, and a lock piece 114 having an upper tapered surface 113 is fixed to the tip of the driving rod. A lower tapered surface 115 is formed on the lower end surface of the connecting link 108 connected to the connecting link 108.
[0041]
Accordingly, when the electric motor 98 is driven, its rotational force is transmitted from the output shaft 99 to the worm wheel 105 via the first gear box 100, the connecting shaft 101, the second gear box 102, the connecting shaft 103, and the worm gear 104, and the worm gear 105 The elevating screw shaft 106 meshing with 104 moves up and down. Therefore, the loading frame 96 connected to the lifting screw shaft 106 via the connection link 108 and the hanging tool 107 can be moved up and down. In this case, regardless of the driving of the electric motor 98, the loading frame 96 can be moved up and down by the distance of the elongated hole 110. However, when the lock cylinder 112 is extended and the lock piece 114 enters below the connecting link 108, the lock frame is locked. The upper tapered surface 113 of the piece 114 pushes up the connecting link 108 via the lower tapered surface 115 of the connecting link 108, so that the loading frame 96 can be restrained from moving up and down.
[0042]
An air spring 116 is interposed between the gantry 93 and the loading frame 96, and an air source is connected to the air spring 116 via an air supply / discharge pipe having a flow control valve (not shown). By adjusting the flow control valve to change the air pressure in the air spring 116, the air spring force is changed, and the downward pressing force by the loading frame 96 can be adjusted. Since the loading frame 96 is hollow, a weight 117 having a predetermined gravity can be mounted inside the loading frame 96. The loading amount of the weight 117 is changed according to the test conditions, and the downward pressing force by the loading frame 96 is adjusted. It is possible.
[0043]
A bogie frame 118 having a downward U-shape is fastened to a lower portion of the loading frame 96, and bearings 120 are supported on left and right sides of the bogie frame 118 via front and rear shaft springs 119. A wheel shaft 121 is rotatably supported through the bearing 120, and left and right loaded wheels 122 are fixed to the wheel shaft 121. A pair of left and right wheel load vibrating devices 123 for applying a load in the vertical direction to the loaded wheels 122 (track 17) are mounted on the bogie frame 118. A pair of left and right lateral pressure vibrating devices 124 for applying a load in the horizontal direction are mounted.
[0044]
That is, in the wheel load vibration device 123, a pair of left and right actuators 125 are mounted on the bogie frame 118, the drive rod 126 can be driven to expand and contract downward, and the mounting jig 127 is fixed to the distal end. . On the other hand, a pair of left and right loading bearings 128 are mounted on the wheel shaft 121 so as to be relatively rotatable and relatively movable in the axial direction, and a mounting jig 127 is connected to the loading bearing 128. The mounting jig 127 is provided with a load cell 129 as detecting means for detecting a vertical vibration (wheel load) generated in the track 17.
[0045]
Therefore, the wheel load vibration device 123 drives the drive rod 126 by the actuator 125, and presses the loaded wheel 122 in the vertical direction via the mounting jig 127, the loaded bearing 128, and the wheel shaft 121, thereby causing the track 17 to move. Vibration can be generated, and the vibration generated in the track 17 by the load cell 129 can be detected as a wheel load. At this time, if the connecting link 108 is not restrained by the lock piece 114 of the lock cylinder 112, only the load of the loading frame 96 and the bogie frame 118 can be applied to the track 17. On the other hand, if the connecting link 108 is restrained by the lock piece 114 of the lock cylinder 112, the entire weight of the loading cart 15 can act on the track 17.
[0046]
In the lateral pressure exciter 124, a pair of left and right actuators 130 are mounted on the bogie frame 118, the drive rod 131 can be driven to expand and contract outward, and a mounting bracket 132 is fixed to the distal end. . On the other hand, a pair of left and right mounting brackets 133 is fixed to the left and right end surfaces of the wheel shaft 121. A rotating shaft 134 extending between the actuator 130 and the wheel shaft 121 in the vertical direction is rotatably supported on the side of the bogie frame 118 by a support cylinder 135. Connection arms 136 and 137 extending in opposite directions are attached to the upper and lower ends of the rotating shaft 134, respectively, and a mounting bracket 132 of the actuator 130 is connected to the upper connection arm 136 via a connection link 138. The lower connecting arm 137 is connected to the mounting bracket 133 of the wheel shaft 121 via the connecting link 139. The mounting bracket 132 is provided with a load cell 140 as detecting means for detecting horizontal vibration (lateral pressure) generated in the track 17.
[0047]
In this case, a predetermined amount of backlash (see FIG. 11) is provided in the connecting portion between each of the connecting arms 136 and 137 and each of the connecting links 138 and 139, and the linear motion of the actuator 130 , And the rotational motion of the rotating shaft 134 can be smoothly converted to the linear motion of the wheel shaft 121.
[0048]
In the lateral pressure exciter 124, each actuator 130 presses the wheel shaft 121 in the axial direction via the rotating shaft 134, the connecting arms 136 and 137, the connecting links 138 and 139, and the like. Is applied at the contact point between the axis of the wheel shaft 121 on which the pressure of the actuator 130 acts and the loading wheel 122 on which the track 17 receives the lateral pressure. In addition, a useless load in the rotating direction acts on the loaded wheel 122. Therefore, by appropriately inputting the pressure of the actuator 130 to the wheel shaft 121, a useless load in the rotating direction is prevented from acting on the wheel shaft 121 and the loaded wheel 122.
[0049]
That is, as shown in FIG. 12, the left-right direction of the vehicle is y, the up-down direction is z, and the rotation direction is θ, and the left actuator 130 is extended and the right actuator 130 is contracted in FIG. It is assumed that a rightward axial load is applied to the wheel shaft 121 via the shaft 134, the connecting arms 136 and 137, the connecting links 138 and 139, and the like. Here, forces acting on the wheel shaft 121 from the right actuator 130 are f _1y and f _1z, and forces acting on the wheel shaft 121 from the left actuator 130 are f _2y and −f _2z .
[0050]
The length of the wheel axle 121 is L, the length between the loaded wheels 122 is l, the height from the contact point between the loaded wheel 122 and the track 17 to the center of the wheel axle H is H. When contracted, this mechanism causes f _1y = f _2y
f _2z = f _1z
f _1z / f _1y = f _2z / f _2y = H / (L / 2)
It becomes. Further, at this time, forces acting on the contact point between the right loading wheel 122 and the track 17 are f _1y and f _1z, and forces acting on the contact point between the left loading wheel 122 and the track 17 are f _2y and f _2z . I do.
[0051]
Then, the balance of the force in the y direction is as follows.
f _1y + f _2y + F _1y + F _2Y = 0
The balance of the force in the z direction is as follows.
f _1z −f _2z + F _1Z + F _2Z = 0
The balance between the horizontal line at the height of the track 17 and the moment about the intermediate point C between the left and right loaded wheels 122 is as follows.
_{-H (f 1y + f 2y)} + L / 2 (f 1z + f 2z) +1/2 (F 1Z -F 2Z) = 0
[0052]
Therefore,
F _1y + F _2y = − (f _1y + f _2y )
F _1Z + F _2Z = 0
F _1Z -F _2Z = 0
Becomes
F _1Z = F _2Z = 0
It is.
[0053]
That is, by extending and contracting the actuator 130 toward the track 17 under the same load, a lateral pressure load can be applied to the track 17 and no load is generated in the vertical direction of the track 17. The mounting angles θ ₁ and θ ₂ of the connecting link 139 are set to the angles of straight lines passing through the connecting point A or B of the mounting bracket 133, the horizontal line of the height of the track 17 and the intermediate point C of the left and right loaded wheels 122. Although it is most desirable, even if the angles are not necessarily matched, the generation of the load in the vertical direction of the track 17 can be similarly suppressed.
[0054]
Accordingly, the lateral pressure vibrating device 124 extends the left actuator 130 and contracts the right actuator 130 in FIG. 12 to make each mounting jig 132, connecting link 138, connecting arm 136, rotating shaft 134, By pressing the wheel shaft 121 rightward through the connection arm 137, the connection link 139, and the mounting jig 133, the track 17 can be excited through the right loading wheel 122, and the load cell 140 Can be detected as lateral pressure. On the other hand, when the left actuator 130 is contracted and the right actuator 130 is extended in FIG. 12, the wheel shaft 121 is pressed to the left in the opposite direction to the track 17 via the left loaded wheel 122. And the load cell 140 can detect the vibration as a lateral pressure.
[0055]
Also, the loading frame 15 is used to fix a truck frame 118 to a loading frame 96 supported on the vehicle body frame 91 so as to be able to move up and down, and each of the actuators of the wheel load vibrating device 123 and the lateral pressure vibrating device 124 By mounting the 125 and 130, the wheel load vibration device 123 and the lateral pressure vibration device 124 are unitized, and the devices are compact and simplified.
[0056]
As shown in FIG. 10, strain gauges 141 are attached to the left and right loading wheels 122, and the strain of the loading wheels 122 is detected by the strain gauges 141, and the wheels of the track 17 are determined based on the strain. Weight and lateral pressure can be determined. In this case, a high-precision test can be performed by properly using or canceling the load cells 127 and 140 and the strain gauge 141 as needed.
[0057]
Here, a description will be given of a track characteristic test method using the mobile loading test vehicle of the present embodiment described above.
[0058]
First, when a track characteristic test is performed by using the exciter 16, the towing vehicle 11 is stopped at the position where the test is performed, and the exciter 16 is positioned and fixed at a predetermined test position using a jack or the like (not shown). In this state, as shown in FIGS. 1, 4, and 5, the actuator 52 of the vibrating device 51 is extended, and the loading jig 55 is lowered via the mounting jig 54 to contact the track 17. The vibration device 51 supports the load behind the vibration carrier 16. On the other hand, the operation handle 65 is rotated to raise the elevating frame 61 with respect to the housing 59, and the front and rear traveling assist wheels 63 are positioned at an upper position and separated from the track 17. In this state, the driving rod 53 is reciprocally driven by the actuator 52 of the vibrating device 51, and the loading jig 55 is vertically pressed against the track 17 via the mounting jig 54 to vibrate. The vibration generated on the track 17 is detected as a wheel load.
[0059]
At this time, a large number of test conditions can be set by changing the load by adjusting the mounting amounts of the weights 46 and 48 according to the test conditions.
[0060]
Next, when a track characteristic test is performed using the loading cart 15, the traveling speed is set to a test speed (for example, 5 to 10 km / h) by the towing vehicle 11 at the position where the test is performed. In this running state, as shown in FIGS. 8 and 10, the drive rod 126 is reciprocated by the actuator 125 of the wheel load vibrating device 123, and the loaded wheel is mounted via the mounting jig 127, the loaded bearing 128, and the wheel shaft 121. 122 is pressed in the vertical direction to cause the track 17 to vibrate, and the load cell 129 detects the vibration generated in the track 17 as a wheel load. In addition, if the lock cylinder 112 is deactivated and the connection link 108 is made free, only the load of the loading frame 96 and the bogie frame 118 can be applied to the track 17. On the other hand, if the lock cylinder 112 is operated to restrain the connection link 108, the entire weight of the loading cart 15 can be given to the track 17.
[0061]
At this time, by stopping the functions of the air springs 32 and the shaft springs 41, the suspension stiffness of the exciter 16 can be changed to perform a track characteristic test. That is, the air in the air spring 32 is discharged to lower the vehicle body frame 31, and at the same time, the hydraulic cylinder 69 is extended to lock the fixed block 71 by the slide block 68, thereby restraining the vehicle body frame 31 to the bogie frame 33. By doing so, the suspension function of the air spring 32 is stopped to increase the suspension rigidity. Also, various kinds of orbital characteristics tests are performed, such as raising the cylinder 78 against the piston 77 by supplying hydraulic pressure and crushing the shaft spring 41 to stop the suspension function of the shaft spring 41 and increase the suspension rigidity. be able to.
[0062]
In addition, when the connecting link 108 is free, by changing the air pressure in the air spring 116, the pressing force of the loading frame 96 on the track 17 can be adjusted. Further, by changing the mounting amount of the weight 117, the downward pressing force by the loading frame 96 can be adjusted.
[0063]
Further, while the loading cart 15 is running, the actuator 130 of the lateral pressure vibrating device 124 is reciprocally driven, and the mounting jig 132, the connecting link 138, the connecting arm 136, the rotating shaft 134, the connecting arm 137, the connecting link 139, The wheel axle 121 is pressed in the axial direction via the mounting jig 133 to excite the track 17 via the loading wheel 122, and the load cell 140 detects the vibration generated in the track 17 as a lateral pressure.
[0064]
As described above, in the mobile loading test vehicle of this embodiment, the loading frame 96 is supported on the body frame 91 by the linear guide 97 so as to be able to move up and down, and can be moved up and down by the electric motor 98. The carriage frame 118 is fixed to the loading frame 96, the bearing 120 is supported on the carriage frame 118 via the shaft spring 119, and the loading wheel 122 is mounted on the bearing 120 via the wheel shaft 121. The frame 118 is equipped with a wheel load exciter 123 for applying a load in the vertical direction to the loaded wheel 122, and a lateral pressure exciter 124 for applying a load in the rotation axis direction to the loaded wheel 122. ing.
[0065]
Therefore, in the case of performing the track characteristic test, the loading frame 122 is lowered together with the loading frame 96 by the electric motor 98 so that the loaded wheel 122 at the standby position can be quickly and easily moved to the test position where the loaded wheel 122 contacts the track. In this test position, the load frame 96 can be restrained by the lock cylinder 112 to the vehicle body frame 91, and only the load of the load frame 96 and the bogie frame 118 can be applied to the track 17. Or the entire weight of the loading truck 15 on the track 17. In addition, various types of trajectory characteristics tests can be performed by setting the trajectory to be non-constrained, for example, by exciting the vehicle frame 91 under vibration conditions that do not propagate to the trajectory 17.
[0066]
Further, the separation of the loading frame 96 from the body frame 91 is constituted by the elongated holes 110 and the connecting shafts 111, and the constraint of the loading frame 96 to the body frame 91 is constituted by the lock cylinder 112 and the lock pieces 114. A variety of track characteristics tests can be performed on the structure. Further, by adjusting the weight of the loading frame 96 by changing the air pressure in the air spring 116 and the mounting amount of the weight 117, the load applied to the track can be easily adjusted.
[0067]
In the above-described embodiment, the loading frame 96 can be moved up and down with respect to the body frame 91 using the electric motor 98, the worm gear 104, the worm wheel 105, and the like. However, the lifting screw shaft can be directly rotated by a plurality of electric motors. Alternatively, a hydraulic jack may be used. Further, the separating mechanism is constituted by the elongated hole 110 and the connecting shaft 111, and the restraining means is constituted by the lock cylinder 112 and the lock piece 114. However, the present invention is not limited to this structure.
[0068]
【The invention's effect】
As described above in detail in the embodiment, according to the mobile loading test vehicle of the invention of claim 1, the lifting frame is supported on the body frame having wheels that can travel along the track so as to be able to move up and down, and the restraining means is provided. As a result, the lifting frame can be restrained so that it cannot be raised and lowered with respect to the body frame, and the vibration raising means for generating a track on the lifting frame is attached, and the detection means for detecting the load acting on the track is provided. By lowering, the exciter can be quickly and easily moved to the test position where it comes into contact with the track, thereby improving workability, and at this test position, the lifting frame can be restrained by the restraining means. It is possible to apply only the load of the lifting frame to the track, apply the full weight of the test vehicle to the track, and apply only the load of the lifting frame to the track. If that is the elastic vibrations generated in the vehicle body frame can be performed a variety of trajectories characteristic test such as not propagate into orbit.
[0069]
In the mobile loading test vehicle according to the second aspect of the present invention, the vibration generating means includes a loading wheel capable of rolling along a track, a wheel vibrating device that applies a vertical load to the loading wheel, Since it was configured with a lateral pressure excitation device that applies a load in the rotation axis direction to the wheel, it is possible to easily apply a load in the vertical direction and the rotation axis direction to the loaded wheel by each excitation device, Workability can be improved.
[0070]
According to the mobile loading test vehicle according to the third aspect of the present invention, the bearing is mounted on the lifting frame via the shaft spring, the loaded wheel is supported on the bearing via the wheel shaft, and the wheel vibration device is mounted on the wheel shaft. On the other hand, while applying a load in the vertical direction, the lateral pressure exciter applies an axial load to the wheel axle and detects the load. It can be grasped quantitatively.
[0071]
According to the mobile loading test vehicle of the invention of claim 4, the lifting frame is supported on the vehicle body frame by a linear guide so as to be able to move up and down, and the upper standby position and the lower test position are moved by lifting means mounted on the vehicle body frame. When the test is not performed, the vehicle is at the upper standby position, so that the vehicle does not hinder the traveling of the vehicle. When the test is performed, the user can easily move to the lower test position.
[0072]
According to the mobile loading test vehicle of the present invention, a separating mechanism is provided between the elevating means and the elevating frame so that the elevating frame can be moved up and down by a predetermined stroke with respect to the body frame, and the restraining means is provided with the separating mechanism. Is stopped so that the vehicle body frame and the elevating frame can be integrally connected, so that the elevating frame can be quickly separated and stopped, and various kinds of track characteristic tests can be easily performed.
[0073]
According to the mobile loading test vehicle of the invention of claim 6, the separation mechanism comprises a long hole provided on one of the lifting means side and the lifting frame side, and a connection shaft provided on the other side and movable in the long hole. And the locking means is a lock cylinder having a lock piece for restricting the movement of the connecting shaft in the elongated hole, so that the lifting frame can be easily separated and stopped with a simple mechanism.
[0074]
According to the mobile loading test vehicle of the invention of claim 7, since the lifting frame is provided with the load adjusting means for adjusting the excitation load by the excitation means, the excitation load applied to the track can be easily adjusted to achieve various types. Orbit characteristics test.
[0075]
According to the mobile loading test vehicle of the invention of claim 8, the load adjusting means is an air spring installed between the body frame and the elevating frame, and the weight of the elevating frame is adjusted according to the air pressure supplied to and discharged from the air spring. Therefore, the weight of the elevating frame can be easily adjusted almost without limit, and the size and weight of the apparatus can be prevented.
[0076]
According to the mobile loading test vehicle according to the ninth aspect of the present invention, the load adjusting means is a weight mounted on the lifting frame, and the weight of the lifting frame is adjusted according to the load of the weight. Adjustment can be performed, and the device can be simplified.
[Brief description of the drawings]
FIG. 1 is a front view of a lower portion of an exciter bogie in a mobile loading test vehicle according to an embodiment of the present invention.
FIG. 2 is a plan view of a lower portion of the vibration excavator according to the embodiment.
FIG. 3 is a lower rear view of the vibration excavator according to the embodiment.
FIG. 4 is a sectional view taken along line IV-IV of FIG. 2;
FIG. 5 is a sectional view taken along line VV of FIG. 4;
6 is a detailed view of a portion VI of FIG. 3 showing a mechanism for changing suspension rigidity by an air spring.
FIG. 7 is a sectional view taken along the line VII-VII of FIG. 4 showing a mechanism for changing suspension rigidity by a shaft spring.
FIG. 8 is a front view of a main part of the loading cart according to the embodiment.
FIG. 9 is a sectional view taken along line IX-IX of FIG. 8;
FIG. 10 is a sectional view taken along line XX of FIG. 8;
11 is a sectional view taken along the line XI-XI in FIG.
FIG. 12 is a schematic view showing a lateral pressure loading mechanism in the loading truck.
FIG. 13 is a detailed view of a portion XIII in FIG. 10 showing a lock mechanism of the loading frame.
FIG. 14 is a schematic view of a mobile loading test vehicle according to the present embodiment.
[Explanation of symbols]
Reference Signs List 11 Towing vehicle 12, 13 Equipment-equipped vehicle 14 Traveling vehicle 15 Loading vehicle 16 Exciting vehicle 17 Track 18 Ground 91 Body frame 96 Loading frame (elevating frame)
97 Linear guide 98 Electric motor 106 Elevating screw shaft 107 Hanging tool 108 Connecting link 110 Slot (separating means)
111 Connecting shaft (separation means)
112 Lock cylinder (restraint means)
114 Lock piece 116 Air spring (load adjusting means)
117 weight (load adjustment means)
118 bogie frame (elevating frame)
119 Shaft spring 121 Wheel shaft 122 Loading wheel 123 Wheel load vibration device 124 Lateral pressure vibration device 129 Load cell (detection means)
140 load cell (detection means)
141 Strain sensor (detection means)

Claims (9)

A body frame having wheels that can travel along a track, a lifting frame supported by the body frame so as to be able to move up and down, restraint means for restraining the lifting frame from being lifted with respect to the body frame, and the lifting frame A moving load, comprising: a vibration generating means mounted on the vehicle for generating the track, and a detecting means for detecting a load acting on the track when the track is generated by the vibration means. Test car. In claim 1, the vibrating means includes a loaded wheel rollable along the track, a wheel load vibration applying device for applying a vertical load to the loaded wheel, and a loaded wheel. A mobile loading test vehicle, comprising: a lateral pressure vibrating device for applying a load in a rotation axis direction. In claim 2, a bearing is mounted on the lifting frame via a shaft spring, the loaded wheel is supported on the bearing via a wheel shaft, and the wheel load vibration device is arranged in a direction perpendicular to the wheel shaft. A mobile loading test vehicle, wherein the lateral pressure exciter applies an axial load to the wheel shaft while applying a load. The lift frame according to claim 1, wherein the lift frame is supported on the vehicle body frame by a linear guide so as to be able to move up and down, and can be moved to an upper standby position and a lower test position by lifting means mounted on the vehicle body frame. A mobile loading test vehicle, characterized in that: 5. The separating mechanism according to claim 4, wherein a separating mechanism is provided between the lifting means and the lifting frame so that the lifting frame can be raised and lowered by a predetermined stroke with respect to the body frame, and the restraining means stops the function of the separating mechanism. Wherein the vehicle body frame and the lifting frame can be integrally connected. In Claim 5, the separation mechanism has an elongated hole provided on one of the elevating means side and the elevating frame side, and a connecting shaft provided on the other side and movable in the elongated hole, The movable loading test vehicle according to claim 1, wherein said restraining means is a lock cylinder having a lock piece for restraining movement of said connecting shaft in said elongated hole. 2. The mobile loading test vehicle according to claim 1, wherein a load adjusting unit that adjusts a vibrating load by the vibrating unit is provided on the lifting frame. 8. The load adjusting device according to claim 7, wherein the load adjusting unit is an air spring installed between the vehicle body frame and the elevating frame, and adjusts the weight of the elevating frame according to the air pressure supplied to and discharged from the air spring. A mobile loading test vehicle, characterized in that: 8. The mobile loading test vehicle according to claim 7, wherein the load adjusting means is a weight mounted on the lifting frame, and adjusts the weight of the lifting frame according to a mounting load of the weight.

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