JPS58202170A - Crawler vehicle - Google Patents

Abstract

PURPOSE:To allow a travelling apparatus of a low contact pressure crawler to be attached without modifying the car body, by providing each track frame with a pair of front and rear connecting sections. CONSTITUTION:The two body connecting sections 60, 61 attached to the endless track frame 40 at selected positions so as to balance the center of the weight of the car body 20 at the center of the contact length of the crawler, the connecting section 61 is fitted and born rotatably on pivot shafts 42, 42' to serve as a bearing body and acts as a fulcrum point of the frame 40, the other connection section 60 is connected to both ends of an equalizer 45, and the right and left frames 40 and a resilient suspension of the car body 20 is allowed to swing relatively so as to make the contact of the crawler with a soft ground good.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention #i relates to a track-type vehicle such as a track-type wetland bulldozer suitable for driving in soft areas such as wetlands, muddy areas, and reclaimed land.

As shown in FIG. 1, the tracked vehicle is equipped with driving wheels 13 and 14 at the front and rear ends of a track frame 12 attached to the vehicle body hVc, and a plurality of wheels are installed in the vertical direction of the track frame 12. (not shown) 11, a driving wheel 13, 14 and a λ endless waist belt 11 in contact with the rolling wheel are configured with fc wear, and the driving wheel 14 on the front and rear side is a crawler belt 118 driving wheel, The driving wheel 13 of the front m@ is an idler wheel, and the driving wheel 14
is mechanically connected to the power transmission mechanism 10 on the vehicle body side, and is restrained to the vehicle body side.

Therefore, the umbrella position l1 of the track frame 12 and the vehicle body A is
11 relationship is determined, and the crawler belt 11 is attached starting from the drive wheel 14.

On the other hand, the endless track of a wetland bulldozer is made by jointing together substantially triangular-shaped wetland tracks, and the width of the track and the contact area of the track are larger than those of a normal bulldozer, increasing the contact area and increasing buoyancy. It is designed to obtain a high ground pressure and a small ground pressure, and it is possible to install such a low contact pressure running equipment on the body of a bulldozer. Normal.

In recent years, the low ground pressure of wetland bulldozers has become increasingly popular, and the demand for low ground pressure has increased! This problem has been addressed by increasing the track width of the I-band and the contact length of the track, but as mentioned above, the attachment point of the endless track to the vehicle body is at the drive wheel portion whose position is restrained by the vehicle body. Therefore, there are many problems in attaching a conventional low ground pressure crawler traveling device to the seven-table body of an ordinary bulldozer.

For example, as shown in Fig. 1, simply increasing the track contact length of the running gear B with a low ground pressure of 11%11 will cause the running gear (liB) to protrude significantly toward the front of the vehicle body. Balance cannot be achieved near the center of the ground contact length, resulting in poor ground pressure distribution and poor wetland driving performance.

Therefore, the car body of a normal bulldozer is extended as shown by the dotted line Ai (not shown, but the car body is extended [7. Rearrangement of power transmission system)] so that the car body head center position is near the center of the track ground contact length. Needs modification to balance.

For this reason, the body of an ordinary bulldozer with a normal track device and the body of a wetland bulldozer cannot be used in common, and it is necessary to manufacture a new body exclusively for the wetland bulldozer, which is not economical, and furthermore, the body of the body cannot be used in common. There are unfavorable effects such as the increase in the number of train lines and the increase in the number of train lines.

In addition, bulldozers are generally manufactured with low ground pressure crawlers with different ground pressures, and with specifications depending on soft areas.

Therefore, as mentioned above, the vehicle body center position 1# is #I
It is not productive and economical to have to create each car body according to the traveling device of the different low ground track so that it is balanced near the center of the imperial ground contact length, and then change the front balance to the M-mounted truck. Not.

The present invention was made in view of the above six circumstances.
1. The purpose is to create a different ground contact without modifying the vehicle body.
To provide a highly productive track-type vehicle in which a traveling device with a low ground pressure crawler track can be installed, and the center of gravity of the vehicle body can be easily set. .

The actual l1tA sequence of the present invention will be explained below with reference to FIG. 2 and subsequent figures.

FIG. 2 is a front view, and FIG. 3 is a plan view of the vehicle body 20.
The F1 car body 23 is comprised of a rigid box 21 and a pair of frames 22 and 22' extending horizontally with a space in front of the rigid box 21. The car body 23 includes a radiator 24, an engine 25, and a hydraulic oil tank. 26, fuel tank 27 and driver's seat 28, and vehicle control box 29
is attached to constitute the vehicle body 20.

Note that the above-mentioned device elements are surrounded by appropriate exterior means to give the appearance of a vehicle body.

A pair of bush arms 31 and 31 of the 1J work equipment device 30 are attached to the pair of frames 22 and 22' of the vehicle body 23 so as to be able to move up and down, and a double-acting lift cylinder 33 (only on one side) is attached to the exterior frame 32 surrounding the radiator 24. As shown in the figure), the construction M&J * 30 can be moved under F, and a winch 34 is attached to the rear side of the rigid box 2I of the vehicle body 23 as a rear working device.

The main vehicle 20 includes a hydraulic drive means as a power transmission system, and after assembling a PTOM [t36] to the flywheel-Renault engine 35 of the engine 25, a pair of hydraulic pops 38 are installed.
(Only one side J is shown) and a charge pop 39. In addition, 37 is a working machine pump, and sound → is a PTO axis.

The vehicle body 23V is equipped with an equalizer <-45 and a suspension mechanism of a pair of left and right pivot devices 42 and 42'. 43. 43 are swingably connected by a coupling shaft 44 in the longitudinal direction of the vehicle body, and the ^11 pivot device f42.42' is connected to the rigid box 2.
The pivot shaft 4 is made up of a pivot shaft 42a, , 42'a that projects in the width direction of the canopy at the left and right rotational positions inside the I, and a trumpet-shaped place cylinder 46°46'.
2a and 42'a are removably attached to the rigid box 21, and the place cylinders 46 and 46' have one end attached to the side wall of the rigid box 21 to prevent the pivot shafts 42a and 42 from bending. 42a, with the small diameter part of the other end holding the bearing
42SL is supported.

The equalizer bar 45 and the pair of pivot groups *42, 42' of the suspension mechanism mentioned above are removable and a pair of low ground pressure crawler belts 50.
, 50' with different lengths in the width direction of the vehicle body according to the track plates mw, and has the function of supporting the vehicle body 20 with a running device j having a low ground contact pressure track.

The low ground pressure crawler traveling device consists of a low ground pressure crawler 50°50' and a low ground pressure endless rolling guide system #51°51'.

The low ground pressure tracks 50 and 50' are manufactured with a width of a waist plate equal to the ground contact length of the track in accordance with the ground pressure specifications (ground pressure value), and are attached around the endless track guide device 51e51'.

The endless track guide devices 51 and 5bi include endless track frames 40 and 40' corresponding to the contact length of the crawler track, and an idler wheel 52 is attached to the front end and a sliding wheel support 54 is attached to the rear end.
2 and the drive wheel device 54, a plurality of vertical wheels 53 and two vehicle body connections [60, 60',
61.61't-Preparation.

The sliding wheel extension [54 is a hydraulic motor 54a and a driving wheel 54.
Hydraulic pressure 1IAA consisting of a deceleration mechanism 5jc equipped with b
The hydraulic motor 54a is connected to the front dpi hydraulic pump 28 by piping (not shown).

Two vehicle body connecting portions 60, 61ti are provided with respect to the endless track frame 4o at positions selected so that the center of gravity of the vehicle body 20 is balanced in the center of the ground contact length of the FL band, and one of the connecting portions 6I is the bipot shaft) 42 , 42' (
b) The bearing body is movably fitted and supported and serves as a swinging fulcrum for the endless track frame 4o, and the other connecting portion 6o is configured to be connected to both ends of the front d-pi equalizer pa 45. The left and right endless track frames 40 are made to swing relative to each other to improve the contact of the crawler tracks with the soft ground.

Therefore, when installing belly belt traveling devices with different track widths and track contact lengths, the nine endless track frames 40 and 40', the immobilizer bar 45, and the pivot devices 42 and 42' must be made separately to match the track. Then, if the equalizer bar 45 and the pivot group *42, 42' are connected to the pair of left and right endless track frames 40°40', they are positioned appropriately so that the center of gravity of the vehicle body is balanced near the center of the track contact length. good.

In addition, track traveling devices with different low ground contact pressures can be attached to one vehicle body, reducing costs and making it easy to set the center of gravity of one vehicle body.

In fact, if the car body 23 is made to standard specifications (that is, the size matches a normal bulldozer equipped with a normal track running device) and a low contact pressure track running device corresponding to the ground pressure specification is installed, Equalizer bar 451. The pivot devices 42, 42' and the endless track frames 40, 40' may be manufactured in accordance with the width of the waist plate of the crawler track and the ground contact comfort of the belt.

The present invention is as follows.
In addition to being able to attach the t-shirt, it is also easy to set the position of the center of gravity of the vehicle body, resulting in a belt-type vehicle with good productivity.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a conventional example, FIG. 42 is a front view showing an embodiment of the present invention, and FIG. 3 is a plan view. 20 is the vehicle body, 23 is the vehicle body, 25 is the engine, 26 is the hydraulic oil tank, 27 is the fuel tank, 28 is the driver's seat, 39
is a hydraulic pop, 40 is a track frame, 42, 42
'rma pivot, 42a+42'8 is pivot/gift, 46, 46' is rat'/<downward lace body, 45
nE7 Noisaban, 54tj hydraulic frame 8kb motorized frame drive wheel device, 60.61 is the connection part.

Claims (1)

[Claims] The vehicle body 23 is equipped with a hydraulic drive power source such as an engine 25 and a hydraulic pump 38, and vehicle body components such as a fuel tank 27, a hydraulic oil tank 26, and a driver's seat 28, as well as work equipment @ 30, etc. 20t, and the vehicle body 20 has an equalizer <-45 and a pair of pivot shafts 42α,
42-, a trumpet-shaped place cylinder 46.46', and a pivot mechanism 42.42' equipped with a trumpet-shaped place cylinder 42.42', which are removably equipped with a pair of front and rear umbrella suspension mechanisms, and include a 5ft drive wheel device with a hydraulic drive element N1. ! Connecting portions 60 of the pair of front and rear vehicle body suspension mechanisms are attached to the endless track frame 40 of the obisashiritake device.
61 is installed so that the true center of the body is balanced near the center of the length of the railing, and is characterized by a horizontal belt type vehicle.