JPS62205862A - Traveling frame assembly device for crawler type vehicle - Google Patents

Abstract

PURPOSE:To produce high adhesion through prevention of the occurrence of pitch jump, by a method wherein the leg part of a crawler link is movably contained in the recessed groove of a track frame, the crawler link is moved by means of a sprocket, and a power transmission member is situated between the crawler links. CONSTITUTION:A traveling frame assmbly body 1 of a crawler type vehicle is formed with a track frame 2, a crawler link 3, rotated along the outer peripheral surface of a track frame 2, a sprocket 4, rotationally driving the crawler link 3. In this case, a recessed groove 2a, wherein the crawler link 3 is moved, if formed in the whole of the outer peripheral surface of th track frame 2, and a guide groove 2d is formed in a surface 2a positioned facing the recessed groove 2b. Meanwhile, a leg part 3a, engaged internally of the recessed groove 2a, is situated to the crawler link 3, and a rotary shaft 6, rolled in the guide groove 2c, is situated between the leg parts 3a. A power transmission member 13 is projected from the front and the rear end surface of the crawler link 3, and an annular seal member 14 is located in a manner to surround the power transmission member 13.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to an undercarriage system for a tracked vehicle that travels by rotating crawler links.

BACKGROUND OF THE INVENTION In most conventional tracked vehicles, a large number of links α are connected endlessly by bins b, as shown in FIG.
A crawler track, to which a track c is fixed, is rotated by a sprocket d to allow the vehicle to travel.

Problems to be Solved by the Invention However, the crawler track of the construction machine as described above has a sprocket d.
When the bushing e fitted into the bottle α engages with each other, a collision sound is generated, causing noise, and the bushing is worn out by the sedge rocket, resulting in low durability.

In addition, when the sprocket (d) engages with the butt, N1Wf must be constantly tensioned to prevent pitch skipping, or an H-band tensioning means such as a coil spring is required, making the structure complicated.

This invention has been made to improve the above-mentioned problems.

Means and Effects for Solving the Problems The undercarriage main body has a track 7 frame whose front and rear ends are formed in a substantially semicircular shape, and the legs are housed in grooves formed on the outer peripheral surface of the track frame. Consisting of a track link, a track plate attached to the track link, a sprocket that rotates the track link along a concave groove, and a power transmission means that transmits the rotation of the track link driven by the sprocket to an adjacent track link. As a result, this undercarriage device for tracked vehicles has durability, low noise, and high adhesiveness comparable to multi-roller undercarriages.

Example An embodiment of the present invention will be described in detail with reference to the drawings.

In the figure, reference numeral 1 denotes an undercarriage body of a tracked vehicle, which is composed of a track frame 2, crawler links 3 that rotate along the outer peripheral surface of the track frame 2, and sprockets 4 that rotationally drive these crawler links 3.

The truck frame 2 is located on both sides of the vehicle body (not shown) and has an elongated box shape in the longitudinal direction of the vehicle body.
The front end and the rear end are formed in a semicircular shape, and a groove 2α in which the crawler link 3 moves is formed on the entire outer peripheral surface.

Further, a guide groove 2C, in which both ends of the rotating shaft 6 rotatably supported by the crawler link 3 roll, is provided on the mutually opposing surfaces 2b of the groove 2α along the entire circumference of the groove 2α. It is being

On the other hand, the crawler link 3 has a pair of legs 3α that fit into the groove 2α of the track frame 2. These leg portions 3α are spaced apart in the width direction of the groove 2α, and have an integral structure in which the upper portions are connected to each other by a connecting portion 3b. Two rotating shafts 6 made of wear-resistant material are rotatably supported via bushings 7.

Both ends of each rotating shaft 6 protrude from both sides of the leg portion 3α, and the leading end side is fitted into the guide groove 2C formed in the track frame 2, and rolls within the guide groove 2C as the crawler link 3 moves. Thus, the load applied to the crawler link 3 is supported.

Further, on the upper part of the leg part 3α of the track link 3, a part 3C is formed to protrude outward, and these parts 3C are attached to the part 3C through an elastic plate 9 made of rubber or the like, and a fixing tool 1 is formed on the leg part 3α.
0, the track plate 11 is attached.

On the other hand, a power transmission member 13 made of a wear-resistant material is protruded from the front and rear end surfaces of the track link 3. The power transmission member 13 has a hemispherical shape elongated in the width direction of the crawler link 3, and adjacent crawler links 3 and power transmission members 13 protruding in the same manner come into contact with each other at their tops. In addition, an annular seal member 14 is provided between the end faces of each crawler link 3 so as to surround the power transmission member 13 . The sealing member 14 is liquid-tightly fixed on both sides to the end face of the crawler track link 3 by baking or other means, and prevents dirt, sewage, etc. from reaching the power transmission member 13, and is sealed inside for lubrication. This prevents lubricating oil such as grease from leaking.

On the other hand, in the groove 2α inner surface 2b of the track frame 2,
One end side of the sealing member 15 is fitted into the sealing support material base 2d between the seal part h and the cloth gap 2d along the outer periphery of the guide groove 2C.

The seal member 15 is formed into a band shape of an elastic material such as oil-resistant rubber, and a thick wall portion 15α on one end side is fitted into the seal mounting groove 2ct, and a prismatic column formed on the other end side. Or the cylindrical seal part 15b is concave #$2
It is slidably fitted into a seal groove 3d provided on the leg 3α of the crawler link 3 moving within α, and this seal portion +5b prevents dirt, sewage, etc. from entering the groove 2a. This is to prevent lubricating oil such as grease sealed in the groove 2α from leaking.

Note that the power transmission member 13 that transmits the driving force to the adjacent crawler link 3 may have one side formed into a convex curved surface and the other side formed into a concave curved surface +3b into which the convex curved surface 13α fits, as shown in FIG.

In the above embodiment, the sprocket 4 is engaged with the rotating shaft 6 provided on the crawler link 3 to drive the crawler link 3, and the tin rocket 4 is directly engaged with the crawler link 3 to drive it. You can do it like this.

Effects of the Invention In accordance with the foregoing false statements, this invention provides a truck frame 2.
The leg portions 3g of a large number of crawler links 3 are movably accommodated in the recess $2α formed in the groove, and the crawler links 3 are moved by the sprocket 4 so as to run. Since the crawler belts are connected in an endless manner, pitch skipping does not occur unlike in nine crawler belts, and each crawler link link 3 does not swing during movement, it is possible to obtain high adhesive strength like a multi-roller type undercarriage.

In addition, power transmission members 13 provided before and after the crawler link 3
Since the structure transmits power to the adjacent track link 3, the only part that wears out is the track plate 11 that contacts the ground.
The durability of the suspension can be greatly improved.

Further, since a structure can be adopted in which the meshing portion between the crawler link 3 and the sprocket 4 is filled with lubricating oil and housed in a sealed chamber, it is possible to reduce wear and noise during meshing.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view showing a part of the undercarriage, Fig. I@2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is an end surface of the track link. Figure 4 is Figure 3 IV
5 is an enlarged view of the circle V in FIG. 2, FIG. 6 is an explanatory diagram showing another embodiment of the power transmission member, and FIG. 7 is an explanatory diagram of a conventional example. . 1 is the suspension body, 2 is the track 7 frame, 2α is the concave groove, 3 is the track link, 4 is the tin rocket, and 11 is the shoe plate.

Claims (1)

[Claims] A track frame 2 in which the front and rear ends of the undercarriage main body 1 are formed in a substantially semicircular shape, and a crawler track link 3 in which a leg portion 3α is accommodated in a groove 2α formed on the outer peripheral surface of the track frame 2.
and the crawler plate 11 attached thereto, and the crawler link 3
A suspension device for a tracked vehicle comprising a sprocket 4 that rotates along a groove 2α, and a power transmission means that transmits the rotation of a crawler link 3 to an adjacent crawler link 3.