JPS5943392B2 - winch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a winch that is capable of performing free rewinding when lowering medium to light objects and power rewinding when lowering heavy objects using two winding drums. The present invention aims to provide a winch with excellent performance and easy operation, and examples thereof will be described below with reference to the drawings.

Figure 1 shows the entire operating system.

In the figure, 1 is a winding shaft, 2 is a winding drum, 3 is a planetary gear mechanism, 4 is a drum type clutch mechanism, 5 is a brake mechanism for the winding drum 2, and 6 is a clutch drum brake for the drum type clutch mechanism 4. T is a locking mechanism of the clutch drum, 8 is a first operating section for winding and power rewinding operations, 9 is a second operating section for operating the winding drum brake mechanism 5, and 10 is the second operating section 9 This is a lock mechanism operation section that operates the clutch drum lock mechanism 7 in conjunction with the operation of the clutch drum lock mechanism 7.

The configuration of each of the above-mentioned parts will be explained below with reference to FIGS. 2 to 9.

First, the winding drum 2 and its peripheral mechanism will be explained.
As shown in the figure, the hoisting shaft 1 is rotationally driven by a prime mover (not shown) via a sprocket 11.

The winding drum 2 is rotatably attached to the winding shaft 1 via a bearing 12, and has a brake surface 13 on the outer peripheral surface of the end on the same axial side of the drum 2, and a planetary gear mechanism 3 on the inner peripheral surface thereof. Internal gears 14 as one element are each formed integrally.

The planetary gear mechanism 3 includes the internal gear 14, a sun gear 15 spline-engaged to the hoisting shaft 1 so as to rotate together with the hoisting shaft 1, and a plurality of planetary gears disposed between the two gears 14 and 15. It consists of 16...

Further, the drum type clutch mechanism 4 has a bearing 1γ on the hoisting shaft 1.
It consists of a clutch drum 18 rotatably mounted through a clutch drum 18, a clutch spider 19 spline-engaged with the sun gear 15 inside the drum 18, and a clutch shoe 20 that presses against the inner peripheral surface of the clutch drum 18. The planetary gears 16 of the planetary gear mechanism 3 are rotatably supported on the clutch drum 18 by shafts 21.

As shown in FIG. 3, the clutch shoe 20 has one end in contact with a pawl 22 of the clutch spider 19 and the other end in contact with a pawl 24 of a lever 23. The clutch shoe 20 is configured to be able to rotate about the center, and by operating the lever 23, the clutch shoe 20 can be expanded and contracted to move toward and away from the inner circumferential surface of the clutch drum 18.

A gear 27 and pawl teeth 28 are provided on the outer peripheral surface of the clutch drum 18.
The clutch drum brake mechanism 6 is constructed based on the gear 27, and the clutch drum lock mechanism 7 is constructed based on the claw teeth 28, respectively.

That is, as shown in FIG. 4, the gear 29 that meshes with the gear 2γ is rotatably supported by the nozzle 30.
A disc brake plate 32 is integrally attached to the tip of the gear shaft 31.

Reference numeral 33 is a cylinder type disc brake that exerts a braking action on the brake plate 32, and the operation of the brake wheel cylinder 33 causes the clutch drum 18 to be fixed via gears 29 and 27.

On the other hand, as shown in FIG. 5, the pawl teeth 28 are formed in a one-way ratchet shape, and when the pawl 35 pivotally supported by the bracket 34 meshes with the pawl teeth 28, the clutch drum 1
8 is always locked against the rewinding direction.

36 is a wheel cylinder for unlocking.

A brake band 3γ is attached to the brake surface 13 of the winding drum 2.
is wrapped.

As shown in FIGS. 6 and 7, the brake band 37 is connected at one end to an anchor pin 38 and at the other end to a wheel cylinder 40 via a rod 39.

The rod 39 is constantly pulled by the coil spring 41, so that the brake band 37 always acts in a direction to tighten the brake surface 13 of the winding drum 2.

This tightening action is effectively exerted for the unwinding rotation of the winding drum 20 in the direction shown by the solid line arrow in FIG. 6, and the tightening force is reduced for the winding rotation shown by the dotted line arrow.

Therefore, the winding drum 2 is always fixed in the unwinding direction by the brake mechanism 5, but rotates in the winding direction while receiving some frictional resistance.

The specific structure of the first operating section 8 is shown in FIG.

Reference numeral 42 denotes an operating lever as an operating body, which is pivotally supported by a stand 43 and is pulled in the direction of the solid line arrow in Fig. 8 when hoisting.
During power rewinding, it is pushed in the direction of the dotted arrow.

The operation of this lever 42 is transmitted to master cylinders 45 and 46 via a link mechanism 44, and the mask cylinder 46, which is activated during the winding operation, is connected to the pipe line 4 as shown in FIG.
It is communicatively connected to the wheel cylinder 25 of the clutch mechanism 4 via 7.

In addition, the master cylinder 4 that operates during power rewinding operation
5 is a conduit 48, a shuttle valve 49, and a conduit 5
0 to the wheel cylinder 40 of the winding drum brake mechanism 5, and is connected to the disc brake 3 of the clutch drum brake mechanism 6 through a branch pipe 51.
3 is connected in communication.

FIG. 9 shows the second operating section 9 and the locking mechanism operating section 10. As shown in FIG.

Reference numeral 52 denotes a pedal as an operating body that is pivotally supported by a stand 53. When this pedal 52 is depressed, a master cylinder 54 and a switching valve 55 are operated simultaneously.

As shown in FIG. 1, the master cylinder 54 is connected to the power rewinding master cylinder 45 in the first operating section 8.
It is connected to the shuttle valve 49 via a conduit 56 that is parallel to the outlet conduit 4B.

Therefore, the winding drum brake mechanism 5 operates to release the winding drum 2 both during power rewinding and free rewinding.

Further, the fluid inlet of the switching valve 55 is connected to a tank 58 as a fluid pressure source via a pipe 5γ, and the outlet is connected to a tank 58 as a fluid pressure source.
It is connected to the wheel cylinder 36 of the locking mechanism 7 via.

The valve 55 is opened to the first position by depressing the pedal 52.
Switches from position a to position b in the figure, which causes tank 5
8 acts on the clutch drum locking mechanism T through the valve 55, so that the clutch drum 18 is unlocked.

Note that instead of the shuttle valve 49, a switching valve 0.61 mm may be used as shown by the imaginary line in FIG.

Next, the operation of the present winch having the above configuration will be explained.

(I) Pull the operation lever 42 of the first winding operation section 8 in the direction of the solid arrow in FIG.

This causes the master cylinder 46 to operate, and the wheel cylinder 25 of the clutch mechanism 4 to operate.

Therefore, the clutch mechanism 4 operates and the clutch drum 18
rotates integrally with the hoisting shaft 1, so the planetary gear 16.
... revolves around the sun gear 15 together with the sun gear 15, and as a result, the internal gears 14,
That is, the winding drum 2 rotates in the same direction as the winding shaft 1.

A winding action is thus performed.

(9) Power rewinding For example, when lowering a heavy object during crane work, or when lowering a leader in a pile driver, the power is lowered for safety.

At this time, push the operating lever 42 in the direction of the dotted line arrow in Figure 1.

In this case, when the master cylinder 45 operates, the wheel cylinder 40 of the winding drum brake mechanism 5 operates, and the winding drum 2 is released.

At the same time, the disc brake 33 of the clutch drum brake mechanism 6 is operated to fix the clutch drum 18.

Therefore, at this time, the planetary gears 16 rotate in the opposite direction to the sun gear 15 that rotates integrally with the hoisting shaft 1 in the planetary gear mechanism 3, and the internal gear 14 rotates in the same direction. Then, the winding drum 2 rotates in the opposite direction to that at the time of winding.

In this way, the heavy object is slowly powered down at a constant speed.

During this power rewinding, in the case of this winch, the clutch drum 18 is doubly locked by the clutch drum brake mechanism 6 and the same locking mechanism 1, so the power rewinding action is reliably performed and safety is high. Become something.

Further, the winding drum brake mechanism 5 has a structure that always fixes the winding drum 2 in the rewinding direction, and when the lever 42 is set to the neutral position, the drum 2 is automatically fixed. Compared to winches that use a brake mechanism that applies braking force when the pedal is depressed, safety is improved during both power and free rewinding, as well as during hoisting.

Furthermore, since it is not necessary to operate the brake pedal each time during power rewinding and hoisting, these operations become easy.

Tilt Free rewinding At this time, by depressing the pedal 52 of the second operating section 9, the master cylinder 54 is actuated and the wheel cylinder 40 of the winding drum brake mechanism 5 is actuated, whereby the winding drum 2 is released. Ru.

At the same time, the switching valve 55 of the lock mechanism operating section 10
is switched to position b, fluid pressure from the tank 58 is applied to the wheel cylinder 36 of the clutch drum locking mechanism 7 through the valve 55, thereby causing the pawl 35 to disengage from the pawl teeth 28 of the clutch drum 18 and locking the drum 1B. will be unlocked.

Therefore, the winding drum 2 freely rotates in the direction of the load, and free unwinding is performed.

When the pedal 52 is released, the winding drum 2 is automatically fixed, and the locking mechanism 1 is activated again to lock the clutch drum 18.

As explained above, according to the present invention, a brake mechanism that always fixes the winding drum in the unwinding direction is employed;
By employing a locking mechanism that constantly locks the clutch drum in the rewinding direction, power rewinding, free rewinding, and winding operations can be performed extremely safely and with simple operations.

[Brief explanation of the drawing]

The figures show embodiments of the present invention, with Figure 1 being an overall system diagram and Figure 2 being an overall system diagram.
3 is a front view of the clutch mechanism, FIG. 4 is a partially sectional side view of the clutch drum brake mechanism, and FIG. 5 is a front view of the clutch drum lock mechanism. Fig. 6 is a front view of the winding drum brake mechanism, Fig. 7 is an enlarged cross-sectional view of the same part, Fig. 8 is a side view showing the first operating section, and Fig. 9 is a view showing the second operating section and the locking mechanism operating section. FIG. 1... Winding shaft, 2... Winding drum, Total... Planetary gear mechanism, 14... Internal gear of planetary gear mechanism, 15... ...same sun gear,
16... Planetary gear, 4... Clutch mechanism, 5... Winding drum brake mechanism,
6...Clutch drum brake mechanism, γ...
. . . same locking mechanism, 8 . . . first operating section, 9.
...Second operating section, 10...Lock mechanism operating section, 18...Clutch drum of clutch mechanism, 25-゛. °°° Same wheel cylinder, 28... Pawl teeth of clutch drum lock mechanism, 35... Same type, 36
...Same wheel cylinder, 3T..."°°°Brake band of winding drum brake mechanism, 40...
...Same wheel cylinder, 42 ....Operation lever (operation body) of the first operation section, 45.46 ....Same master cylinder, 33 ....Clutch drum brake key Mechanism wheel cylinder, 52...2nd
Pedal (operating body) of the operating section, 54... Master cylinder, 55... Switching valve of the lock mechanism operating section, 58... Tank (fluid pressure source).

Claims (1)

[Claims] 1. A winding drum equipped on the winding shaft via a bearing, a sun gear that constantly rotates integrally with the winding shaft, an internal gear provided on the winding drum, and a winding drum disposed between the internal gear and the sun gear. a planetary gear mechanism consisting of a planetary gear that transmits the rotation of the winding shaft to the winding drum; a clutch drum that rotatably supports the planetary gear of the planetary gear mechanism; a clutch spider that constantly rotates integrally with the winding shaft; A drum-type clutch mechanism includes a wheel cylinder that connects or separates the clutch spider and clutch drum, and works with a planetary gear mechanism to control the rotational direction of the winding drum, and the winding drum is always fixed in the unwinding direction. a winding drum brake mechanism equipped with a wheel cylinder for fixing the clutch drum in the drum-type clutch mechanism; a clutch drum locking mechanism equipped with a wheel cylinder; a first operating section for winding and power rewinding switching equipped with an operating body; and two master cylinders that are selectively activated in accordance with the operation of the operating body; and an operating body. and a second operating section for operating the winding drum brake mechanism, which includes one master cylinder that is operated by the operation of the operating body; a switching valve that switches and operates in conjunction with the operation of the second operating section; a locking mechanism operating section for operating the clutch drum locking mechanism, the locking mechanism operating section having a fluid pressure source connected to a fluid inlet of the switching valve; The master cylinder of the second operation section is connected to the wheel cylinder of the winding drum brake mechanism, and one master cylinder of the first operation section is connected to the wheel cylinder of the winding drum brake mechanism and the clutch drum brake mechanism. The other master cylinder is connected to the wheel cylinder of the drum type clutch mechanism, and when winding, the clutch mechanism is actuated by operating the first operating section, and when rewinding, the same clutch mechanism is operated. By operating the operating section, the take-up drum brake mechanism is deactivated and at the same time the clutch drum brake mechanism is actuated. During free rewinding, the second operating section and the locking mechanism operating section are operated to release the take-up drum. A winch characterized in that the clutch drum lock mechanism is deactivated at the same time as the brake mechanism is deactivated.