JPS6042025Y2 - Track link floating prevention device in tool bar for disassembling track chains - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a track pin that connects track links in a tool bar that is attached to the ram head of a press machine and used for disassembling track chains of tractors, bulldozers, etc. The present invention relates to a track link lifting prevention device that prevents a track chain from floating when the track pin is removed from the track link by pressing the end face of the track pin with a pin tool.

A tool bar for disassembling a track chain is used by attaching it to the ram head of a press machine by inserting a mounting bolt into a bolt through hole drilled in the center of the tool bar, as shown in, for example, Japanese Utility Model Application Publication No. 51-89606. A pin tool and a bushing tool attached to the tool bar are used to extract the track pin and bushing of the track chain from the track link and disassemble the track chain.

(Problem to be solved by the invention) In general, a track chain moves with the contact surfaces, which are the inner surfaces of the links, being supported by rolling contact on the track rollers R, and there may be pebbles or the like between the track rollers and the inner surfaces of the links. Easy to get caught.

As a result, the grounding part A of the track chain tilts as shown by the chain line in Figure 1, and the end surface T of the track pin P comes into contact with the guide plate D, causing uneven wear or damage and deforming into a tapered shape ( This is especially true for truck chains on tractors used for work such as carrier scrapers and rippers).

For this reason, when disassembling the track link, use the pin tool 9.
easily slips along the tapered surface T of the track pin end surface,
Not only is it impossible to push out the pin, but the reaction may cause the track chain to float or even jump up, which can be dangerous.

To prevent this, conventionally the truck chain was hoisted up by a crane or forklift, turned upside down, and then pressed, but since the truck chain itself is a heavy object, it is very dangerous and Work efficiency is also extremely poor.

Moreover, in general, disassembling a track chain involves a shoe removal process as a pre-process, and in this process, the shoe mounting bolt of the track chain is removed using an impact wrench with the shoe mounting surface facing upward, so the roller conveyor is left in this state. It is desirable to transfer the upper part and attach it to the press machine from the viewpoint of improving work efficiency.

The present invention has a simple structure that automatically prevents the link from floating during disassembly, and can be used safely without restricting the work area like other holding devices. It is.

(Structure of the invention) The structure of the invention is to attach a link lifting prevention piece with a generally inverted cross-section to the tool bar for disassembling the track chain by sharing its mounting bolt, and as the pin tool advances, The plate portion faces the shoe mounting surface of the link to restrain the link from moving upward and prevent it from floating.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG. 3 and subsequent figures.

4 is a toolbar for disassembling the track chain,
It has two parallel surfaces 2 and 3, and a bolt through hole 5 that passes through the two surfaces and is attached to the head 16 of the ram 15 of the press is bored in the center.

7 is a pin tool mounting hole, 8 is a bushing tool mounting hole, and these mounting holes 7 and 8 have a pin tool 9 and a bushing tool for pressing the end surfaces of the track pin P and bushing B that connect the links L together. A bushing tool 10 is attached by bolts 11 and 12, respectively.

Reference numeral 20 denotes a link lifting prevention piece, which includes a vertical plate portion 21 attached to the outer surface 2 of the tool bar 4 on the opposite side from the ram head attachment surface 3, and is integrally fixed on the jaw insert 6 from the upper end of the vertical plate portion 21. The horizontal plate part 22 extends horizontally toward the shoe mounting surface 18 of the track link L, and the vertical plate part 21 has a bolt through hole 24 in the center thereof. There is.

The bolt through hole 24 is provided at a position that matches the bolt through hole 5 of the tool bar 4, and at a height that matches the height of the lower surface of the horizontal plate portion 22 with the height of the shoe mounting surface 18 of the track link L. .

Further, the horizontal plate portion 22 has a length such that it extends over the shoe mounting surface 18 of the track link before the pin tool 9 and the bushing tool 10 come into contact with each end surface of the track pin and the bushing, and An inclined surface 25 that slopes upward is formed at the lower part.

Furthermore, a reinforcing thick part 26 is formed on the inner surface of the joint between the vertical plate part 21 and the horizontal plate part 22.

Therefore, when attaching the tool bar 4 to the ram head 16 of the press machine, the bolt through holes 5 of the tool bar 4 and the bolt through holes 24 of the link lifting prevention piece 20 are aligned, and the bolt through holes 5 and 24 are installed in a common manner. By inserting the bolt 17, the link lifting prevention piece 20 is attached to the tool bar 4.
It is also detachably attached to the ram head 16.

(Effect of the invention) Since the present invention has the above configuration, the link lifting prevention piece 2
When the tool bar 4 to which the tool bar 0 is attached is advanced toward the track link L on the jaw insert 6 by the ram 15 of the press machine, first, the horizontal plate portions 2, 2 of the link lifting prevention piece 20 are attached to the shoe of the track link. In this state, the pin tool 9 and the bushing tool 10 press the end surfaces of the track pin P and the bushing B, so that the upward movement of the track link L is caused by the horizontal movement of the link lifting prevention piece 20. Since it is suppressed by the plate portion 22, even if the end face of the track pin is worn out and becomes a tapered surface T, the track chain does not float up, and the track chain can be pushed out at a fixed position on the jaw insert 6. It can be disassembled reliably, improving work efficiency.

Since the link floating prevention piece 20 is attached to the ram head 16 together with the tool bar 4 by sharing the mounting bolt 17 of the tool bar 4, there is no need to provide a separate mechanism for attaching the link floating prevention piece to the tool bar, and the overall The configuration can be simplified and it can be easily attached to an existing toolbar.

Furthermore, since the link lifting prevention piece 20 of the present invention is attached to the center of the tool bar 4, the pin tool 9 and the bushing tool 10 are attached to the track pin P as shown in FIG.
At the position where each end face of the bushing B is pressed, the horizontal plate portion 22 of the link floating prevention piece 20 is automatically positioned at the center of the shoe mounting surface 8 of the track link L, effectively preventing the track chain from floating. can be prevented.

Furthermore, the link lifting prevention piece 20 of the present invention has an extremely simple configuration of a vertical plate part and a horizontal plate part, and is small in size, so it does not reduce the working volume and does not interfere with other operations or works, making it safe. It can be used for.

In addition, in the above example, if the bolt through hole of the link floating prevention piece is made into a long hole that is long in the vertical direction, by adjusting the installation height position of the link floating prevention piece, it can be used for different types of track chains. Convenient for disassembly.

Further, the structure of the tool bar is not limited to the above example, but may have any other shape, and it goes without saying that the present invention can be implemented with a tool bar that is also used for disassembling and assembling the track chain.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the track chain in use when it is attached to a vehicle body, Fig. 2 is a cross-sectional view showing the track chain being disassembled by a conventional device, and Fig. 3 and the following show an embodiment of the present invention. , Fig. 3 is an exploded perspective view, Fig. 4 is a plan view showing the state in which the chain is disassembled, and Fig. 5 is the VI of Fig. 4.
-VI is a sectional view above the edge line. 4...Tool bar, 5...Mounting bolt through hole, 7...Zentool mounting hole, end...
Bushing tool mounting hole, 18...Shoe mounting surface, 20...Link lifting prevention piece, 24...
...Bolt through hole.

Claims (1)

[Scope of utility model registration request] In a tool bar for disassembling a track chain, in which a bolt through hole for attaching to the ram head of a press machine is drilled in the center, and pin tool and bushing tool mounting holes are drilled on both sides of the tool bar, the ram head of the tool bar and A link lifting prevention piece consisting of a vertical plate part that is attached to the non-contact surface of the board and has a mounting bolt through hole, and a horizontal part that extends horizontally from the upper end of the vertical board part is attached to the above board by a common bolt. A track link lifting prevention device in a tool bar for disassembling a track chain, which is detachably attached to the ram head together with the tool bar.