JPS6239143Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improved means for assembling a push arm of a working machine such as a blade to a trunnion of a tracked vehicle.

Generally, in the case of a bulldozer, it is necessary to frequently attach and detach the blade device depending on work conditions and site conditions.

For example, a bulldozer used for work inside a ship's hold is carried into the hold by a crane, but in this case, due to weight limitations of the crane, the push arm of the blade device is removed from the trunnion on the dozer side and the dozer and blade are removed. The equipment is being brought in individually. After the transport, the push arm is again supported by the trunnion.

However, in the conventional support means of this kind, as shown in FIG. The support cap 3 which is fitted into the socket and fastened to the socket with a plurality of through bolts 4 has the same cross-sectional shape.

It is difficult to match the socket and cap with such a configuration to the trunnion, which poses a major hindrance to the push arm assembly work.

In particular, the assembly work is very difficult and requires a considerable amount of time and effort since it is carried out on soft, uneven ground such as powdered coal, iron ore, etc., which are loaded in the hold.

In addition, during the assembly work, the push arm is pushed up to the trunnion support position using a jack installed under it, but in this case, since the location where the jack is installed is soft as described above, the jack may sink in. There is a great danger that it may come off.

This invention was made in view of the above circumstances, and its main purpose is to provide a push arm mounting device for supporting a working machine of a tracked vehicle, which allows the trunnion support portion of the push arm to be easily matched to the trunnion.

Another object of this invention is to provide a push arm mounting device for supporting a working machine of a tracked vehicle, which allows the work of assembling the push arm to the trunnion to be carried out easily and efficiently at any site.

Another object of this invention is to provide a highly reliable push arm mounting device for supporting a working machine of a tracked vehicle that greatly contributes to improving safety during push arm assembly work.

A preferred embodiment of this invention will be described below with reference to FIG. 2 and subsequent drawings.

First, in the tracked vehicle 10 shown in FIG. 2, a trunnion 13 is integrally provided on a track roller frame 12 of an undercarriage device 11.

The proximal end of a push arm 14 having a blade 15 at its tip is removably attached to the trunnion 13 via a trunnion support 16.

The trunnion support 16 is shown in FIGS. 3 and 4.
As is clearer in the figure, it consists of a socket 16A that is integrally connected to the base end of the push arm 14, and a cap 16B that is removably fastened to the socket via a trunnion 13.

The socket 16A has a horizontal half-cut support hole 17 that is fitted into and aligned with one half circumferential surface of the trunnion 13.
and a tapered inner wall surface 18 for making the open end side of the support hole gradually wider than the outer diameter of the trunnion 13 to facilitate fitting into the trunnion.

On the other hand, the cap 16B has a half-cut support hole 19 that is fitted into and aligned with the opposite circumferential surface of the trunnion 13. The peripheral wall of the support hole 19 is formed as a wedge-shaped sharp tapered wall 20 to be aligned with the tapered inner wall surface 18 of the socket 16A.

The socket 16A and the cap 16B have bolt holes 21 and 22 through which a through bolt 23 for removably fastening them to each other is passed.

Therefore, the push arm 14 is connected to the socket 16.
It is assembled to the trunnion 13 by sandwiching the trunnion 13 between A and the cap 16B, passing them through each other, and tightening them with bolts 23.

In this case, the push arm 14 must be raised to the trunnion support position.

For this reason, the vehicle 10 is equipped with a hydraulic cylinder 24 dedicated to attaching the push arm.

The cylinder 24 is suspended via an upper chain 26 from a lift cylinder mounting mount 25 provided on the vehicle 10 and has a hook 28 connected via a lower chain 27 .

The push arm 14 includes a hook holder 29 that is integrally formed near the socket 16A and on which the hook 28 is removably hooked, and a hook holder 29 that is integrally protruded at a spaced apart position in front of the holder and has an upper end attached to the mount 25. It has an arm-side mount 31 for removably connecting the lower end of the lift cylinder 30 to which the lift cylinder 30 is pivotally mounted.

Hydraulic cylinder 24 exclusively for attaching the push arm
has a single-acting pulling cylinder configuration that retracts with hydraulic pressure only in the direction of lifting the push arm 14 and returns with a spring (not shown).
It has an outwardly extending coupler 24a.

The hydraulic cylinder 24 is connected to an attachment pump (not shown) dedicated to the cylinder via a hydraulic hose connected to the coupler 24a.

When the vehicle 10 is to be engaged in work inside a ship's hold, for example, the blade 15 and the push arm 14 are removed and the vehicle is carried into the hold by a crane, as shown in FIG.

After the transport, the push arm 14 is assembled in the following manner.

First, as shown in FIG. 3, the hook 28 of the arm attachment cylinder 24 suspended from the lift cylinder mount 25 on the vehicle 10 side is hooked onto the hook receiver 29 of the push arm 14.

Next, by shortening the cylinder 24 with pressure oil from a dedicated attachment pump, the push arm 14 is lifted to a position where the socket 16A is approximately at the same height as the trunnion 13. In this state, move the vehicle 10 forward slightly to remove the socket 16A from the trunnion 13.
Insert and match.

In this case, the socket 16A has, as described above,
A tapered inner wall surface 18 is formed that gradually widens the open end side of the half-cut support hole 17, and this wall surface serves as a trunnion guide surface when the socket is inserted. Even if the position is slightly misaligned, it is extremely easy to perform.

A wedge-shaped gap is created between the tapered inner wall surface 18 of the socket 16A fitted into the trunnion 13 and the circumferential surface of the trunnion, so the cap 16 is inserted into the gap.
The sharp tapered wall 20 of B is intervened. This properly aligns the cap 16B with the trunnion 13 while necessarily positioning the socket and cap respective bolt holes 21 and 22 in alignment.

Therefore, after inserting the through bolt 23 into the bolt hole, a nut is screwed onto the bolt and tightened, thereby completing the assembly work of the push arm 14 to the trunnion 13.

As a result of experiments, the assembly work, including connecting the lift cylinder 30 to the cylinder mount 31 on the push arm side, can be completed in about 5 minutes.
it is obvious.

In addition, the cylinder 24 dedicated to attaching the push arm
may be connected to the existing hydraulic system of the vehicle 10.

As described above, this invention provides the following various excellent effects.

(i) Since the vehicle itself is equipped with a cylinder dedicated to attaching the push arm, the push arm can be easily pulled up to the trunnion support position by the cylinder even on soft materials such as items loaded in a hold. Therefore, when assembling the push arm, there is no risk of the jack getting stuck in the soft material or coming off, unlike in the past where the arm was pushed up from below with a jack, etc.
This greatly contributes to improving safety during the above assembly.

(ii) Since the open end of the trunnion support socket of the push arm is gradually expanded larger than the trunnion outer diameter, the socket can be matched to the trunnion with great ease.

(iii) Therefore, the push arm assembly work can be carried out easily, efficiently, and safely at any site, and this requires frequent attachment and detachment of work equipment such as blades on tracked vehicles. This is a big advantage when engaging in work.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the trunnion support portion of a blade push arm according to the prior art;
The figure is a side view of a bulldozer according to a preferred embodiment of this invention, FIG. 3 is an exploded view of the main parts, FIG. FIG. 10 is a tracked vehicle, 13 is a trunnion, 14 is a push arm, 15 is a blade, 16A is a socket, 16B is a cap, 17 and 19 are half-cut support holes, 18 is a tapered inner wall surface, 20 is a sharp tapered wall, 24 is a cylinder It is.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A device for removably attaching and setting a push arm for supporting work equipment such as blades to the trunnion of a tracked vehicle, which is integrally connected to the trunnion connection end of the push arm. a trunnion support socket having a half-cut support hole formed therein that is removably fitted into and aligned with the trunnion from one side; and a half-cut support hole that is fitted and aligned with the trunnion from the opposite side of the socket; It is equipped with a cap that is removably fastened to a socket with a through bolt, etc., and a cylinder dedicated to mounting the push arm that is installed on the vehicle side and lifts the socket side of the push arm to a height position where the socket can be aligned with the trunnion, The socket has a tapered wall surface whose open end side of the half-cut support hole gradually widens beyond the outside diameter of the trunnion, and the cap has a tapered outer wall surface that matches the tapered inner wall surface so that the cap and the socket are connected. A push arm mounting device for supporting a working machine of a tracked vehicle, characterized in that the device is configured to be fastened in a detachable manner. (2) A cylinder dedicated to attaching a push arm is suspended from a lift cylinder mount equipped on the vehicle side via a chain, etc., and has a hanging chain or wire rope, etc. that is hooked onto the push arm. A push arm mounting device for supporting a working machine of a tracked vehicle according to Claim 1 of the Utility Model Registration Claim. (3) The cylinder exclusively used for attaching the push arm has a single-acting pulling hydraulic cylinder configuration that retracts with hydraulic oil in the direction of lifting the push arm and returns with a spring. A push arm attachment device for supporting a working machine of a tracked vehicle according to item 2. (4) The working machine for a tracked vehicle according to any one of claims 1 to 3 of the claims for utility model registration, characterized in that the cylinder is connected to a dedicated attachment pump. Support push arm attachment device.