JPS6019028Y2 - Track frame structure of crawler traveling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a track frame structure for a crawler traveling device.

Conventionally, in the track frame structure of a crawler traveling device, as shown in Japanese Utility Model Application Publication No. 51-63331, the tension wheel support frame attached to the front end of the main frame with a downward opening was molded from a single plate using a press. Ta.

In this way, when the tension wheel support frame is formed by pressing, the bending process becomes complicated.

In addition, since the top and bottom tension wheel support frame portions were simply connected at their ends by the lid, the portion of the upper frame portion that receives the weight of the aircraft, where the bearing contacts, is located upward. It was easily bent and had low strength.

Therefore, as a solution to the above-mentioned drawbacks,
52351 is shown.

This structure consists of assembling the tension wheel support frame attached to the front end of the main part of the truck frame using flat plates or angle materials, and also attaching the tension wheel support frame attached to the front end of the main part of the truck frame to the lateral outside of the pair of upper and lower frame parts that support the tension wheel bearings. By connecting the parts through the outer plate, manufacturing process is facilitated and strength is increased.

However, with this structure, a flat plate or angle material that is completely separate from the truck frame is attached to the front end of the main part of the truck frame, so the upper frame part for supporting the tension shaft and the lower frame part are It is difficult to maintain the parallelism of the parts, and the tension ring cannot slide smoothly.
Since it is separate from the truck frame, it has the disadvantage that it is not very strong.

The present invention makes it easy to manufacture a tension shaft support frame, and
To obtain a tension wheel support frame structure that is strong in strength and allows the tension wheel to slide smoothly.

The technical means of the present invention taken to solve the above problems is to create a hollow track by integrally forming a substantially U-shaped portion that opens downward and a reinforcing rib portion that extends outward approximately horizontally from each of its lower edges. A protruding side wall portion formed by an extension of the upper side wall of the substantially U-shaped portion extends along the longitudinal direction of the truck frame at the front end of the main portion of the frame, and a lower edge of the protruding side wall portion. A pair of left and right upper plates extending over the entire length and extending outwardly of the substantially U-shaped portion are welded to the substantially U-shaped portion and the protruding side wall portion in a state of extending outward in a substantially horizontal manner. An angled reinforcing member is welded with its upper edge welded to the upper end side of the protruding side wall portion, and its lower edge welded to the free end side of the upper plate body, and is connected to the protruding side wall portion and the upper plate body. The upper frame part for supporting the tension shaft is formed by forming a rectangular cylindrical part in cooperation with the
A pair of left and right lower plates substantially parallel to the upper plate are separately welded to the reinforcing rib portion, and a pair of left and right substantially U-shaped reinforcement members are welded at both ends to the lower plate. , and the upper plate and the lower plate of the pair of upper and lower tension shaft supporting frames are provided so as to form a rectangular cylindrical part in cooperation with the lower plate to form a lower frame portion for supporting the tension shaft. A pair of left and right outer plates are welded to the lateral outer parts of the body to form a pair of left and right bearing storage spaces, and lids for both ends of the four rectangular cylindrical parts and the inner part of the bearing storage space are formed. The lids for the side openings are welded to each other, and this configuration provides the following effects.

That is, the truck frame is provided at the front end of the main part of the truck frame, which is formed by integrally forming a substantially U-shaped portion opening downward and a reinforcing rib portion extending outward approximately horizontally from each of its lower edges. Since the protruding side wall portion formed by the extension of the upper side wall of the substantially U-shaped portion is extended along the longitudinal direction of the frame, the protruding side wall portion that is integral with the truck frame is used as a reference. By assembling angle materials and flat plates, it is possible to assemble the upper frame part and the lower frame part for tension shaft support with high precision, and the parallelism of the upper frames in plan view and the relationship between the upper frame and lower frame in side view can be accurately assembled. It is easy to achieve parallelism, so the tension wheels can slide smoothly, and since the upper frame, which receives the weight of the aircraft, is integrated with the track frame through the protruding side wall portion, it can be constructed as a separate body. It can strongly resist twisting and bending compared to other types.

Embodiments of the present invention will be described below with reference to the drawings.

A traveling vehicle body equipped with a pair of left and right crawler traveling devices 1, 1 is provided with a traveling platform 2 that can freely travel around the vertical axis, a control section 3 is provided on the traveling platform 2, an excavation device 4 is provided, and the other , an earth removal device 5 is provided on the traveling vehicle body so as to be able to rise and fall freely, and the traveling devices 1, 1, traveling platform 2, excavation device 4, and earth removal device 5 are configured to be driven by hydraulic pressure as an example of a fluid pressure type. It is equipped with a working vehicle so that it can perform both excavation and earth removal work with just one vehicle.

The left and right crawler traveling devices 1, 1 constitute the traveling vehicle body.
A pair of front and rear horizontal frames 7.7 are installed on the truck frame 6.6 constituting the vehicle, and a traveling platform mounting frame 8 is connected to the horizontal frames 7.7.

In the figure, 9 and 9 are a pair of left and right arms 10.1 of the earth removal device 5.
0, and 11 is a bracket that connects a cylinder 12 for vertically driving and raising/lowering the earth removal device 5.

Each of the truck frames 6 and 6 has a main part A formed in a substantially U-shaped part 13 that opens downward, and a reinforcing rib part extending outward from both lower edges of the main part 6 in a substantially horizontal direction. 14 are integrally formed, and reinforcing plates 13a are mounted across both ends of the opening of the substantially U-shaped portion 13.

In the figure, W is an opening for adjusting the tension on the idler wheel 15.

Idle wheels for crawler tension (
To constitute the tension shaft support frame portion that supports the left and right bearing portions 16 and 16 of the tension ring) 15 so as to be movable in the longitudinal direction, a tension shaft support frame portion is provided at the tip of the main portion A that is connected to the upper side wall of the substantially U-shaped portion 13. integrally forming a protruding side wall portion 17.17;
extending over the entire length of the lower edge of each of the protruding side wall portions 17 and 17 and over each of the outer surfaces of the substantially U-shaped portion 13;
A pair of left and right upper plates 1 extend outward approximately horizontally.
8.18 is welded, and the angle-shaped reinforcing member 19 is
Its upper edge is welded to the upper end side of the protruding side wall portion 17, and its lower edge is welded to the road edge side of the upper plate body 18, and the reinforcing member 19 is provided in cooperation with the protruding side wall portion 17 and the upper plate body 18. A rectangular tube state 20 is formed between the upper frame portion and the upper frame portion for supporting the tension shaft.

The upper plate body 18. A pair of left and right lower plates 21.21 are separately welded to each reinforcing rib part 14.14 so as to protrude from the main part A in a state substantially parallel to E7. A substantially U-shaped reinforcing member 22 formed by welding an angle-shaped member and a flat plate-shaped member with both ends welded to the lower plate body 21 is provided at the lower part of each,
In cooperation with the lower plate body 21, the reinforcing member 22 forms a rectangular cylindrical portion 23 to form a lower frame portion for supporting the tension shaft.

Free end sides of the upper and lower plates 18.21 facing each other,
That is, the side plate 24 is welded across the lateral outer part,
The space S is used to accommodate the bearing portion 16 of the idler wheel 15.

The four square tubular parts 20.20. 23. Lid bodies 25 are welded to both ends of each of the square tubular parts 20. 20. 23, 23 and the storage spaces S and S, respectively, in order to increase the shape retention strength.

[Brief explanation of the drawing]

The drawings show an embodiment of the track frame structure of the crawler traveling device according to the present invention, and FIG. 1 is an overall side view of the working vehicle;
FIG. 2 is a plan view showing the frame structure of the traveling vehicle body, FIG. 3 is a side view of the truck frame, and FIG.
FIG. 5 is a perspective view of the main parts of the truck frame. 6... Truck frame, 13... Roughly U-shaped portion, 14... Reinforcement rib portion, 17...
...Protruding side wall portion, 18... Upper plate body, 1
9...Angle-shaped reinforcing member, 20, 23...
... Square tubular part, 21 ... Lower plate body, 22 ...
.... U-shaped reinforcing member, 24 .... side plate,
25.26... Lid body, A... Main part of truck frame, S... Bearing storage space.

Claims (1)

[Scope of utility model registration request] The truck frame 6 is attached to the front end of the main portion A of the truck frame 6, which is integrally formed with a substantially U-shaped portion 13 that opens downward and a reinforcing rib portion 14 that extends outward substantially horizontally from each of its lower edges. A protruding side wall portion 17.17 constituted by an extended portion of the upper side wall of the substantially U-shaped portion 13 extends along the longitudinal direction, and extends over the entire length of the lower edge of the protruding side wall portion 17, and extends along the length of the substantially U-shaped portion 13. A pair of left and right upper plates 18.18 spanning the outer surfaces of the character-shaped portion 13 are welded to the substantially U-shaped portion 13 and the protruding side wall portion 17 in a state of extending outward in a substantially horizontal manner, thereby forming a pair of left and right angles. A reinforcing member 19 . A rectangular cylindrical portion 20 is provided in cooperation with the upper plate 18 to form an upper frame portion for supporting the tension wheel, and a pair of left and right sections substantially parallel to the upper plate 18 are formed. Lower plate body 21.21
are separately welded to the reinforcing rib portions 14, and a pair of left and right substantially U-shaped reinforcing members 22, 22 are formed, with both ends of the reinforcing members 22, 22 being welded to the reinforcing rib portions 14 separately.
1 and in cooperation with the lower plate body 21 to form a rectangular cylindrical portion 23 to form a lower frame portion for supporting the tension wheels. The lateral outer parts of the upper plate body 18 and the lower plate body 21 of the frame are welded with a pair of left and right outer plates 24, 24 to form a pair of left and right shaft tube storage spaces S, S, and the four rectangular tubes are shaped part 20,2
0, 23. Lid body 25 for both ends of 23, and
A lid body 26 for the back opening of the shaft tube storage space S, S
, 26 are welded together. A track frame structure for a crawler traveling device.