JPS6412331B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of vibrating a tracked vehicle for performance testing and durability testing of the tracked vehicle.

Generally, when a tracked vehicle is vibrated by a vibrator, the tracked vehicle under test is equipped with highly rigid tracks, so when vibrating, the piston rod of the vibrator is moved in the axial direction. Since a lateral force acts on the track and the crawler track is configured in a link shape, it is difficult to excite the track with a large excitation amplitude and a high excitation frequency.

Further, during excitation, due to the relative excitation of adjacent vibrators, the crawler track may separate from the vibrator, especially when the excitation amplitude is large. Therefore, there is a need for a method to easily excite the vehicle as if it had all tracks.

Therefore, this invention solves the conventional problems and has a full crawler track, with small to medium excitation amplitude,
It is an object of the present invention to provide a method for vibrating a tracked vehicle that can easily vibrate the tracked vehicle not only in a low-medium excitation frequency region but also in a large excitation amplitude and high excitation frequency region.

Therefore, in order to achieve this object, the method of exciting a tracked vehicle according to the present invention is to vibrate the tracks of the tracked vehicle that is in contact with the ground, or the first and last part of the tracked vehicle that has many wheels equipped with tracks. A track tensioning device is provided in the lower part of the intermediate track wheels other than the track wheels from which the tracks have been removed, and a track tensioning device is provided to apply an equivalent tension to the tracks in place of these tracks, and a track tensioning device is installed to apply tension to the tracks in place of these tracks. a wheel bearing device that is attached to a vibration exciter and receives each corresponding wheel; and a wheel receiver device that is provided on the wheel receiver device and receives the crawler tensioning device, and that operates the crawler tensioning device in conjunction with the wheel. A wheel support that restricts the movement of a tracked vehicle without applying external restraining force to the tracked vehicle by supporting the vibrating receiving part and the rolling wheels of the tracked vehicle that are vibrating due to vibration. In an excitation method using an excitation device equipped with a mount device, a crawler is added instead of the crawler to the part where the crawler is in contact with the ground or the lower part of the intermediate wheels other than the first and last wheels has been removed. It is characterized in that the tracked vehicle is vibrated by the vibration exciter in a state as if it had all tracks by applying a tension equivalent to that of the tracked vehicle.

Hereinafter, a method for exciting a tracked vehicle according to the present invention will be explained with reference to the drawings.

FIGS. 1 to 3 are diagrams for explaining the vibration excitation method for a tracked vehicle according to the present invention.
is the track C of the part of the tracked vehicle T that is in contact with the ground, which has many track wheels equipped with tracks, in other words, the track C of the lower part of the track wheels W of the tracked vehicle T, or the first and last track C. This is a crawler tensioning device that removes the crawler C at the bottom of the intermediate wheel W other than the crawler at the bottom of the wheel and attaches it in its place to provide tension equivalent to the removed crawler C, making it appear as if all the tracks were present. This allows vibration to be easily performed even under conditions of large vibration amplitude and high vibration frequency.

As shown in FIGS. 4 and 5, the crawler belt tensioning device 1 connects the connector 3 to the crawler belt C using an auxiliary crawler pin 2.
The other end of this connector 3 is connected to a wire rope 4 with a yoke (or a roller chain with a yoke) using a connector pin 5, and is attached to the part from which the crawler track C has been removed to provide track tension and facilitate vibration. This crawler belt tensioning device 1 is attached to both sides of the crawler belt C, respectively.

Next, a vibrating device for vibrating the track tensioning device 1, which applies a tension equivalent to that of the crawler belt, at the same time as the track wheels W will be described.

As shown in FIGS. 1, 6, and 7, the vibration excitation device includes a plurality of vibration excitation devices in which a piston rod 6a moves up and down to vibrate a track tensioning device 1 and each wheel W mounted on a tracked vehicle T. a vibration exciter 6, a wheel support device 7 attached to the piston rod 6a of the vibration exciter 6 to receive each wheel W, and a yoke of the crawler belt tensioning device 1 attached to the wheel support device 7. Wire rope receiving part 8 for tensioning the crawler track that receives the attached wire rope 4
and a hydraulic power source 9 for operating the vibration exciter 6.
A control device 10 that controls the frequency and amplitude of the vibrator 6
It has .

The wheel bearing device 7 will be described in detail with reference to FIGS. 6 and 7. A connector 11 is connected to the piston rod 6a.
A support fixture 12 screwed and fixed through the
The longitudinal direction of the tracked vehicle T (direction of arrow X) with the pin 13 inserted through the connector 11 as the center of rotation.
A slide part receiver 15 is rotatable and tiltable in a direction orthogonal to the support fixture 12, and has springs 14, 14 interposed between it and the support fixture 12 to return the slide part to its original position when no load is applied. A front and rear slide part 17 is connected to the receiver 15 by a dovetail groove flat bearing 16 and is slidable in a direction orthogonal to the rotating direction of the slide part receiver 15, that is, in the longitudinal direction of the tracked vehicle T.
The front and rear sliding portion 17 is a dovetail groove flat bearing 18.
It has left and right slide parts 19 as rolling wheel contact parts which are connected to each other and are slidable along the left and right direction of the tracked vehicle T. Above left and right slide part 1
The shape of the head of No. 9 has a slight flat part in the center, and both ends of the head of the left and right slide parts 19 are chevron-shaped with crawler relief parts 19a, so as to avoid interference with the crawler C during vibration. It's summery. Further, as shown in FIG. 7, a large number of rollers (or balls) 20 are disposed on the head of the left and right slide portions 19 so that the crawler belts C that come into contact with them slide.

Incidentally, center return springs (not shown) are built in between the left and right slide parts 19 and the front and rear slide parts 17, and between the front and rear slide parts 17 and the slide part receiver 15, respectively. In addition, slide part receiver 1
When the inclination of 5 is not required, the spring 14 can be removed and fixed directly to the support fixture 12 by screwing.

Next, the wire rope receivers 8 for tensioning the track are provided on the left and right sides of the wheel receiver 7, and two pulley shafts are provided on the left and right sides of the left and right slide parts 19 so as to protrude laterally. 21, 21, and pulleys 22, 22 slidably attached to the pulley shafts 21, 21, and are configured to sandwich the wire ropes 4, 4 with yokes.

Next, when the tracked vehicle T is vibrated, especially in a low excitation frequency and large excitation amplitude region, large pitching and rolling occur, and the tracked vehicle T moves in the front and rear, left and right directions, and falls off. At the same time, a lateral load acts on the vibrator, making it impossible to vibrate. In order to prevent this from occurring, a support device is required that maintains the body of the tracked vehicle T as a specimen in a free state and does not affect the movement characteristics of the vehicle. The wheel support mount device 23 used for this purpose will be explained with reference to FIGS. 8 to 12. This rolling wheel support frame device 23 has one each on the left and right.
The wheel support part 2 is installed on the support stands 23a, 23a, which are installed at least 2 sets and fixed to the ground foundation with anchor bolts.
4 are connected with bolts, and this rolling wheel support part 24 allows the rolling wheels W to move back and forth and in the left and right directions (slip off).
In addition to restricting and supporting the
This prevents excessive lateral loads from acting on the vibrator.

However, the wheel supporting frame device does not restrict the vertical movement of the wheel due to vibration. The front and rear support stands 23a, 23a are connected to tie rods 25.
and is fixed by left and right support plates 26. In detail, the movement of the wheel W in the front and back direction is performed by the sliding portion 27.
The sliding part 2 is guided and supported by
7 is attached to the wheel support part 24 by a dovetail groove so that it can freely slide up and down, so that the wheel W
This does not limit vibrations in the vertical direction. That is, the rolling wheels W are guided and supported by the sliding portion 27 and can freely move up and down, and when the rolling wheels W are not in contact with the sliding portion 27, the spring 28 causes the sliding portion 27 to return to the neutral position. It's getting old.

In addition, the support for restricting the movement of the wheel W in the left and right direction is
This is done by slide parts 29 and 30 as shown in FIG. That is, the slide portion 29 is attached to the left and right support plates 26 via a dovetail groove so as to be slidable vertically, and the slide portion 30 is attached to the slide portion 29 via a dovetail groove so as to be slidable left and right. . As the wheel W moves in the vertical direction, the slide portions 29 and 30 slide in the vertical and horizontal directions, respectively, as shown by the arrows in the figure, and the springs 31 and 32 cause the wheel W to move toward the slide portion 30. When it is not in contact with , it returns to its original neutral position.

Therefore, it is possible to vibrate each wheel W by installing a vibration exciter 6 on each wheel W, and during the vibration, the wheel W is restrained from moving in both the left and right and front and rear directions. The structure is such that the vibrating tracked vehicle T is maintained in a free state without direct external restrictions and can be freely vibrated in a low vibration frequency and large vibration amplitude range.

Therefore, in this invention, when exciting the tracked vehicle T, the tracked vehicle T is connected to the tracked track C with high rigidity.
is the crawler track C below the wheel W of the tracked vehicle T, or
In FIG. 1, the tracks C below the intermediate wheels W other than the tracks below the first and last wheels have been removed and a track tensioning device 1 has been installed in their place. By inputting the rolling wheel acceleration of
By applying vibration to the vehicle, it is possible to reproduce the rough terrain driving conditions of an actual vehicle.

At this time, since the highly rigid crawler track W has been removed, the wire rope 4 with yoke is vibrated at the same time as the track wheel W in a state equivalent to wearing the track, as if it had all the tracks, and the vibration amplitude is large. , vibration tests can be easily performed at high vibration frequencies, and the driving conditions of an actual vehicle can be faithfully reproduced.

In this case, as described above, the force in the longitudinal direction of the tracked vehicle T is absorbed by the sliding of the front and rear slide parts 17, and the force in the left and right direction is absorbed by the sliding of the left and right slide parts 19. Furthermore, even if the tracked vehicle T rolls, the slide portion receiver 15 is tilted, so no force is directly applied to the vibrator 6. Further, since the crawler belt tensioning device 1 is used instead of the crawler belt 3, the vibrator 6 is not subjected to a force in the lateral direction with respect to the axial direction of the vibrator 6 due to the crawler belt tension.

In addition, since the crawler C on the side in contact with the vibrator 6 or the crawler C at the lower part of the intermediate roller W other than the lower part of the first and last roller W is removed, the relative There is no problem such as when the crawler belt C separates from the vibrator 6 for vibration, and the crawler tensioning device 1 allows faithful vibration as if the entire crawler track were present.

Furthermore, the wire rope receiver 8 for tensioning the track is removed, and only the track wheel W is vibrated, or the tension of the track tensioning device 1 is changed, and the track tensioning device 1 and the track tensioning device 1 are moved.
It is possible to conduct a test in which the impact of track restraint (change in track tension) on vehicle body vibration characteristics can be ascertained by simultaneously exciting the tracks.

Next, when the tracked vehicle T is vibrated at a low vibration frequency and a large vibration amplitude region, the tracked vehicle T pitches or rolls significantly and moves in the front, back, left and right directions. In this case, the wheel W is restrained by the wheel support frame device 23, and the tracked vehicle T is
By maintaining it in a free state with no external restraint applied, it is possible to vibrate freely and faithfully in the low excitation frequency and large excitation amplitude ranges.

When a roller chain 104 with a yoke is used instead of the wire rope 4 with a yoke, as shown in FIG. 13, a roller chain receiving part 108 for tensioning the track is used instead of the wire rope receiving part 8 for tensioning the track. That is, the two sprocket shafts 1 on the left and right sides of the left and right sliding portion 19 of the wheel bearing device 7
Upper and lower sprockets 1 are provided with protruding parts 07 and are engaged with the yoke-equipped roller chain 104.
06,107 installed and roller chain with yoke 1
04, and is vibrated at the same time as the wheel W, and even though a portion of the crawler track is removed, the tension of the roller chain 104 with a yoke provides the same tension as if the entire track were present. This makes it easy to excite.

As explained above, according to the present invention, a track equivalent to a crawler track is added to the part of the tracked vehicle that is in contact with the ground, or the part where the lower part of intermediate wheels other than the first and last wheels is removed. Since the tracked vehicle is vibrated by the vibrator as if it had the entire track by applying a tension of Small to medium excitation amplitude in a state as if it had
This has the effect of making it possible to easily and faithfully test the tracked vehicle not only in the low and medium vibration frequency range, but also in the large vibration amplitude and high vibration frequency range.

Further, in the present invention, by removing the receiving part of the track tensioning device and vibrating only the track wheels, or by changing the tension of the track tensioning device and simultaneously exciting the track wheels and the track tensioning device, the track restraint ( This has the effect of allowing vibration tests to be conducted to understand the effects of changes in track tension on the sway characteristics of a tracked vehicle.

Furthermore, by using the wheel support mount device to excite the tracked vehicle that is vibrating during excitation without applying any external restraints, it can be applied freely and faithfully in the low excitation frequency and large excitation amplitude ranges. This has the effect of allowing vibration tests to be performed.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the overall configuration of the vibration excitation device used in the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a side view of the same, FIG.
The figures are a side view, FIG. 6 is a side view showing the wheel support device and the wire rope receiver for tensioning the track, FIG. 7 is a front view of the same, and FIG. 8 is the wheel support pedestal device. 9 is a front view of the same, FIG. 10A is a sectional view taken along the Z-Z cutting line of FIG. 10B,
C is a front view and a side view of the sliding part of the wheel support frame device, FIG. 11 is a plan view taken along the - line in FIG. 9, FIG. 12A is a plan view showing the vicinity of the tie rod of the device, and FIG. FIG. 12B is a side view of the same, and FIG. 13 is a front view showing the roller chain receiving portion for tensioning the crawler belt. DESCRIPTION OF SYMBOLS 1... Crawler tensioning device, 6... Vibrator, 7... Rolling wheel receiver, 8... Wire rope receiving part for crawler tensioning, 108... Roller chain receiving part for crawler tensioning, 2
3...Rolling wheel support mount device.

Claims (1)

[Scope of Claims] 1. A tracked vehicle having many track wheels equipped with tracks, on the part of the tracked vehicle that is in contact with the ground, or on the part from which the track is removed from the lower part of the intermediate track wheels other than the first and last track wheels, Instead of these crawlers, a crawler tensioning device is installed to apply an equivalent tension to the crawler tracks, and a vibrator that vibrates each of the wheels at a predetermined frequency and amplitude is installed to receive the corresponding wheels. a track bearing device; a receiver provided on the road wheel receiving device to receive the crawler belt tensioning device and vibrating the crawler belt tensioning device in conjunction with the rolling wheels; In an excitation method using an excitation device comprising: a wheel support mount device that supports the wheels of a vehicle to limit its movement without applying any external restraining force to the tracked vehicle; , apply an equivalent tension to the crawler in place of the crawler to the part where the crawler is in contact with the ground, or the lower part of the intermediate wheels other than the first and last wheels, and apply the same tension to the crawler instead of the crawler, and create the above condition as if all the tracks were present. A method for exciting a tracked vehicle, the method comprising shaking the tracked vehicle using a vibration exciter. 2. A method for vibrating a tracked vehicle according to claim 1, wherein the receiver is attached to the wheel receiver and the track tensioning device is vibrated simultaneously with the wheel. 3. The device according to claim 1, in which the receiving part of the track tensioning device is removed and only the track tensioning device is vibrated, or the tension of the track tensioning device is changed to vibrate the track tensioning device and the track tensioning device simultaneously. How to excite rail vehicles. 4. A method for vibrating a tracked vehicle according to claim 1, in which the tracked vehicle is vibrated by the wheel support frame device without applying any external restraint to the tracked vehicle that is vibrating during vibration.