JPS583894Y2 - Double-hull hoisting machine for multi-rope grab bucket of grab dredger - Google Patents

Description

[Detailed description of the invention] The present invention is a double-hull hoisting machine for a multi-rope grab bucket of a grab dredger, in which the winding drum for the packet support roller and the winding drum for the packet opening/closing rope are each driven by separate prime movers. related to things.

Generally, the grab bucket used in grab dredgers is a double-rope type, and the grab bucket is operated by a support rope for raising and lowering it and an opening/closing rope for opening and closing, and two winding drums for each rope. have

Recently, there have been many floating cranes with a double-body hoisting machine in which the main hoisting drum and the auxiliary hoisting drum are driven by independent prime movers, and each hoisting drum can be controlled independently. When converting a floating crane into a dredger, one winding drum is used for the packet support rope, and the other winding drum is used for the packet opening/closing rope.

It is necessary to synchronize the speeds of the support rope and opening/closing rope when lowering and hoisting the packet so that there is no slack in each rope, but if an engine is used as the prime mover, It is extremely difficult to synchronize both drums while controlling the engine independently.

This invention uses two unidirectional rotating engines as prime movers, and when raising and lowering the grab bucket, not only can the speeds of both drums be synchronized, but the grab bucket can also be operated using the combined output of both engines. The purpose is to provide a device that can

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

The first embodiment is shown in FIGS. 1 and 2, and a frame 11 has a winding drum 1 for packet opening/closing ropes and a winding drum 1' for packet supporting ropes, which are rotatable by shafts 5 and 5', respectively. It will be erected in

A clutch drum 2a and a brake drum 3a are fixedly installed on both sides of the winding drum 1, and an external wire type band clutch 2b acts on the clutch drum 2a. The external line type band brake 3b is activated, and the two constitute the brake 3.

The drum gear 4 is fixed to the shaft 5 by a key or the like, and rotates the band clutch 2b together, so when the band clutch 2b is operated to engage the clutch 2, the drum gear 4 and the winding drum 1 rotate as one unit.

If the clutch 2 is disengaged and the winding drum 1 is in an idling state, the pan-do brake 3b is applied to the brake drum 3a.
The rotation of the winding drum 1 can be stopped.

The drum gear 4 meshes with the pinion 6 and is rotated by the output shaft of the torque converter 9 via gears 7 and 8 for deceleration.

The input shaft of the torque converter 9 is connected to the output shaft of the engine 10 by a coupling or the like, and the power of the engine 10 is converted by the torque converter 9 into torque and speed corresponding to the load applied to the winding drum 1 and transmitted to the winding drum 1. Ru.

Note that the torque converter 9 has a built-in release clutch, and when this is released, the power of the engine 10 is not transmitted to the output shaft of the torque converter.

Packet support rope drum 1', clutch 2', brake 3', drum gear 4', torque converter 9'
The structure of the engine 10' and the mutual relationship of each member are exactly the same as those on the opening/closing rope winding drum 1 side, except that the deceleration device includes a roller chain deceleration device (large sprocket 7', small sprocket 8'). ) is used, but this can also be used as a gear reduction device.

The drum gear 4 on the opening/closing rope winding drum 1 side and the drum gear 4' on the support rope winding drum 1' side are brought into meshing relationship with each other.

FIG. 3 shows an example of a grab bucket operated by this hoist, with left and right shells Bl.

B1 is the relative position of the upper frame B2 which is pivotally supported by the lower frame B3 and suspended from the support rope R2, and the lower frame B3 which is suspended from the opening/closing rope R1 via the upper and lower pulleys B, B5. Due to the change, B.

assumes the solid line position (closed) and the chain line position (open), raises and lowers the bucket) B by operating the support rope R2, and opens and closes the shells B 1 and B 1 of the packet by operating the opening/closing rope R1.

The function of this hoist in grab dredging work is as follows.

The work cycle of grab dredging consists of a packet shell grabbing process, an actual packet presentation process, a turning process, a releasing process,
There are six strokes: a turning stroke, a descent of the empty packet, and a stroke of landing on the bottom.

In the grasping stroke and the releasing stroke, only the opening/closing rope is operated to open and close the packet, and in the turning stroke, neither rope is operated.

In the process of hoisting up a real packet and lowering an empty packet, both ropes must be hoisted or unwound at the same time at the same speed.

In the gripping process of this hoisting machine, the support rope winding drum 1
The clutch 2' on the 'side is released, the rotation of the winding drum 1' is stopped by the brake 3', and the winding drum 1 for opening/closing lobes is rotated by the output of the engines 10 and 10', and the opening/closing rope R1 is wound up to collect the packet. Shells B, , B are closed, and during the discharge stroke, the support rope winding drum 1' is similarly stopped, the engine speed is reduced, and shells B,
, B, and the weight of the ejected shell B1. Torque converter 9 and 9 due to the torque trying to open B1
The winding drum 1 is reversed by using the reversal of the pump blades in 1. Release Bt.

In the turning stroke, the clutches 2 and 2' are released and the winding drum 1
and 1' are stopped from rotating with brakes 3 and 3' and turned.

In the process of winding up the actual packet and lowering the empty packet, the clutches 2 and 2' are engaged to rotate both the winding drum 1 and 1' to wind up or unwind the opening/closing rope R1 and the support rope R2.

When rewinding, adjust the engine speed so that the torque applied to the turbine blades of torque converters 9 and 9' due to the weight of the grab bucket is greater than the stall torque corresponding to the engine speed, and reverse the turbine blades. and reverse the winding drums 1 and 1'.

During the process of hoisting and lowering the packet, both ropes are simultaneously hoisted or rewound at synchronous speeds.

The reason is as follows. The engine, torque converter on the opening/closing rope side and supporting rope side of this hoist,
The specifications of the winding drum, speed reducer, etc. do not necessarily have to be the same, but since the design would be complicated, if we assume that they are all designed as the same thing, the load on both winding drums will be balanced. In this case, the rope speeds of each winding drum will be synchronized even if there is no meshing relationship between the drum gears 4 and 4', but in reality, it is impossible for the loads applied to both winding drums to always be balanced.

In the case of hoisting, if the load on the support rope is greater than the load on the opening/closing rope, the rotation speed of the output shaft of the torque converter 9' on the side of the winding drum 1' for the supporting rope will be the same as that of the torque converter 9' on the side of the winding drum 1 for opening/closing rope. The rotational speed of the output shaft will be lower than that of the output shaft.

However, in this playing machine, the drum gears 4 and 4' are in mesh, so the surplus output on the side with a smaller load helps the side with a larger load, and the speeds of both ropes are synchronized.

In the end, the rope is hoisted at a synchronized speed that matches the total load on both ropes and the total output of the engine.

During the descent of the empty packet, shell B 1. B 1 must be lowered in an open state, but it tends to close due to the load, but since there is a meshing relationship between drum gears 4 and 4', the unwinding speed of both ropes is lower for the same reason as before. Synchronize.

Figure 4 shows the mesh clutch 1 that connects drum gears 4 and 4'.
This is a plan view of another embodiment in which the drum gear 4 is rotatably mounted on a frame 11, and the structure is different from the first embodiment. Engage with gear 13 keyed on top of 15,
The drum gear 4' is engaged with the idle gear 14 on the shaft 15, and the pawl 12' of the dog clutch 12, which is slidably mounted on the spline shaft portion 15' of the shaft 15, and the pawl 14' of the idle gear 14 are engaged and released. This is due to the addition of a flexible configuration.

Therefore, this embodiment can be used in exactly the same way as the first embodiment, and the winding drum 1 and the winding drum 1
' can be operated completely separately.

The present invention is a double-hull hoisting machine for a multi-rope grab bucket of a dredger, in which a winding drum 1 for a packet opening/closing rope and a winding drum 1' for a packet support rope are rotatably installed on a frame 11. is connected to the drum gear 4 via the clutch 2 and further to the unidirectionally rotating engine 10 via the torque converter 9, and the other winding drum 1' is connected to the drum gear 4' via the clutch 2'.
Furthermore, it is connected to another unidirectionally rotating engine 10' via a torque converter 9', and the drum gear 4 and the other drum gear 4' are meshed, and the grab bucket is opened/closed and raised/lowered by simultaneous operation of both engines. Although the mechanism is extremely simple, it is possible to perfectly synchronize the opening/closing rope and the support rope at a speed that matches the total load on both ropes and the total output of both engines. When the clutch of one winding drum is released and only the other winding drum is rotated, the total output of both engines can be applied to it, making the most effective use of the two engines.

In addition, increasing the output with a single prime mover requires significantly increasing the strength of the reduction gear, but the present invention does not have such concerns and has an extremely simple mechanism, making it highly economical.

In addition, if the second embodiment is used, both engines can operate the winding drums separately, so it can be used for crane work and can be used for various other purposes, which is extremely convenient. .

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention. FIG. 2 is a side sectional view of the winding drum portion same as above. FIG. 3 is a side view of the grab bucket operated by the hoist of the present invention. FIG. 4 is a plan view of another embodiment. FIG. 5 is a partially cutaway plan view of the dog clutch portion same as above. In the figure, 1.1'... winding drum, 2.2'...
...Clutch, 4゜4'...Drum gear, 9
．． 9'...Torque converter, 10.10'
...Engine, 11...Frame.

Claims (1)

[Scope of utility model registration request] A winding drum 1 for a packet opening/closing rope and a winding drum 1' for a packet support rope are rotatably installed on a frame 11. The other winding drum 1' is connected to the rotary engine 10 so as to be interlocked with the rotary engine 10.
It is connected to the drum gear 4' via the clutch 2', and further to the other unidirectional rotating engine 10 via the torque converter 9'.
The drum gear 4 and the other drum gear 4' are connected to each other so that the drum gear 4 and the other drum gear 4' are connected to each other, and the grab bucket is opened, closed, raised and lowered by simultaneous operation of both engines. Torso hoist.