JPS6326079B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a winch drive device.

Cranes are equipped with a diesel engine as the prime mover. In the case of so-called mechanical cranes, this diesel engine is used directly as the power source for the winch, and in the case of hydraulic cranes, the diesel engine drives the hydraulic motor via a pump. This hydraulic motor is used as a power source for the winch. Furthermore, in the case of electric cranes, an electric motor is the power source. As described above, conventionally, as a power source for a winch, one of a diesel engine, an electric motor, and a hydraulic motor (hydraulic motor, water pressure motor) has been used. However, although diesel engines and electric motors (hereinafter collectively referred to as prime movers) have advantages such as high horsepower and tenacity in hoisting force, they are said to have difficulty controlling speed in high and low speed ranges. has shortcomings. On the other hand, although hydraulic motors have the unique advantage of being easy to control speed in high and low speed ranges, they suffer from high power transmission loss and are inferior in operating efficiency.
It also has the disadvantages of weak starting force and lack of winding tenacity. Therefore, when using a conventional winch drive device in which only one of the prime mover and the hydraulic motor is used as a power source, there are advantages and disadvantages in terms of performance, and the result is not necessarily satisfactory.

Therefore, the present invention aims to provide a winch drive device that can improve winch performance by taking advantage of the advantages of both a prime mover (diesel engine or electric motor) and a hydraulic motor.

The present invention is characterized by a prime mover as a first power source, a hydraulic motor as a second power source driven by the prime mover via a pump, and rotation of these prime mover and hydraulic motor. both first and second power transmission mechanisms that transmit power to the hoisting shaft of the winch drum; a hoisting mechanism that rotates the drum in the hoisting direction; a hoisting mechanism that also rotates the drum in the hoisting direction; A first operating valve for power switching that selectively operates both second power transmission mechanisms, and a second operating valve for hoisting and hoisting switching that selectively operates both the hoisting and hoisting mechanisms. A winch drive device comprising:

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

A is a winch, B is a prime mover as a first power source, i.e. a diesel engine or an electric motor,
C is a hydraulic motor (a water pressure motor is also possible) as a second power source driven by this prime mover B via a pump D.

To outline the winch A, 1 is a hoisting drum, 2 is a hoisting shaft, 3 is a planetary gear mechanism, 4 is a drum type clutch mechanism, 5 is a negative brake that constantly fixes the drum 1, and 6 is a planetary brake. 7 is the clutch cylinder of the clutch mechanism 4;
By the operation of the cylinder 7, the clutch drum 8 rotates together with the hoisting shaft 1, and the rotation of the drum 8 is transmitted to the hoisting drum 1 via the planetary gear mechanism 3.
As a result, the drum 1 rotates in the same direction as the hoisting shaft 2 (hoisting rotation). That is, the clutch mechanism 4 and the planetary gear mechanism 3 constitute a hoisting mechanism.
9 is a brake cylinder of the planetary brake 6, and the operation of the cylinder 9 causes the clutch drum 8 to
is fixed. Therefore, at this time, the rotation transmitted from the planetary gear mechanism 3 to the hoisting drum 1 is opposite to that during hoisting (so-called power hoisting rotation). That is, the planetary brake 6 and the planetary gear mechanism 3 constitute a lowering mechanism. Reference numeral 10 denotes a brake cylinder of the negative brake 5. When the cylinder 10 operates, the braking force on the hoisting drum 1 is released, and in this state, the hoisting drum is removed by operating the hoisting mechanism or the hoisting mechanism as described above. 1 performs hoisting rotation or powered hoisting rotation.

Next, in the drive system, 11 is the output shaft of the prime mover B, 12 is the output shaft of the hydraulic motor C (hereinafter referred to as the first output shaft and the second output shaft), and the first output shaft 11 is constantly operated. Clutch cylinder 1 in condition
3, a negative clutch mechanism 14 is provided,
By providing a positive clutch mechanism 16 with a clutch cylinder 15 that is always in an inactive state on the second output shaft 12, the first (prime mover side) power transmission mechanism E ₁ and the second (hydraulic motor side) power transmission mechanism It constitutes E ₂ . In addition, the first output shaft 11
is interlocked and connected to the rotating shaft of the pump D via gears 17 and 18, thereby allowing the prime mover B to constantly rotate the pump D. On the other hand, both the negative and positive clutch mechanisms 14,1
The output shaft 19 of No. 6 has gears 20, 21 and an intermediate shaft 22.
It is interlocked and connected to the hoisting shaft 2 via a chain transmission mechanism 23. 24 is a regulator that adjusts the amount of oil discharged from the pump D.

To explain the control thread, 25 is a first operating valve for power switching that selectively enables the first and second power transmission mechanisms E ₁ and E ₂ , and is connected to a lever 26 and one variable pressure reducing valve 27 It is completed. 28 is hoisting drum 1
A second operation valve for switching between hoisting and hoisting that switches the rotation direction of the lever 29 and a pair of variable pressure reducing valves 30, 3.
It consists of 1. The primary sides of both the first and second operating valves 25 and 28 are connected to a hydraulic power source 32. Two secondary side pipes 33, 3 of the second operation valve 28
4, one pipe line 33 is connected to the clutch cylinder 7 of the clutch mechanism 4 in the winch A, and also connected to the brake cylinder 10 of the negative brake 5 via the shuttle valve 35, and the other pipe line 34 is connected to the clutch cylinder 7 of the clutch mechanism 4 in the winch A. It is connected to the brake cylinder 9 of the rebrake 6 and also to the brake cylinder 10 of the negative brake 5 via the shuttle valve 35. The secondary side pipe line 36 of the first operation valve 25 branches into two pipe lines 37 and 38, and one of the pipe lines 37 is connected to both the first and second power transmission mechanisms E ₁ ,
It is connected to the clutch cylinders 13, 15 of the clutch mechanisms 14, 16 at _E2 . Therefore, when pressure oil is supplied from the pipe line 36, the negative clutch cylinder 13 is switched to the inoperative state and the positive clutch cylinder 15 is switched to the operating state at the same time, the first power transmission mechanism _E1 is turned off, and the second power transmission mechanism is turned off. Mechanism E ₂ is turned on. That is, the winch drive power source is switched from the prime mover B to the hydraulic motor C. In addition, the other branch pipe line 38 of the pipe line 36
is connected to the pump regulator 24.

Next, the effect will be explained.

(i) Motor drive In the illustrated state, that is, when the lever 26 of the first operation valve 25 is in the a position, no pressure oil is supplied to the secondary pipe line 36 of the valve 25. Therefore, the first power transmission mechanism _E1 is in the on state,
The hoisting shaft 2 of the winch A is directly driven by the prime mover B. In this state, when the second operating valve 28 is operated in the direction of arrow A, pressure oil from the hydraulic source 32 passes through the second operating valve 28 and the pipe 33 to the brake cylinder 10 of the negative brake 5 in the winch A and the clutch. It is supplied to the cylinder 7. As a result, the negative brake 5 is released, and at the same time the clutch mechanism 4 is operated, and the hoisting drum 1 rotates integrally with the hoisting shaft 2, that is, performs hoisting rotation. On the other hand, when the lever 29 of the second operation valve 28 is operated in the direction of the arrow B, pressure oil is supplied from the operation valve 28 through the conduit 34 to the brake cylinder 10 and the brake cylinder 9 of the planetary brake 6. . This results in
As described above, at the same time as the negative brake 5 is released, the planetary brake 6 is activated, so the clutch drum 8 is fixed, and the hoisting drum 1 is rotated downward by the action of the planetary gear mechanism 3.

(ii) Hydraulic motor drive When the lever 26 of the first operating valve 25 is set to the b position, pressure oil from the hydraulic source 32 passes through the valve 25 and enters the secondary pipe line 36, from where it flows into the pipe line 3.
It is branched into 7 and 38. The pressure oil entering the pipe 37 is simultaneously supplied to the clutch cylinder 13 of the first clutch mechanism 14 and the clutch cylinder 15 of the second clutch mechanism 16. This results in
As mentioned above, the first power transmission mechanism _E1 is turned off, and the second
Power transmission mechanism _E2 is turned on, and hydraulic motor C
rotation is transmitted to the hoisting shaft 2. That is, the power source is switched from the prime mover B to the hydraulic motor C. Further, the pressure oil entering the pipe line 38 from the pipe line 36 is supplied to the regulator 24, but this pressure oil is reduced to a pressure that does not reach the level of operating the regulator 24 at the first operation valve 25. Therefore, the regulator 24 does not adjust the amount of oil discharged from the pump D. That is, at this stage, from the prime mover B to the hydraulic motor C
Only the power source is switched to , and the rotational speed of the hydraulic motor C is not controlled.

Next, when the lever 26 is operated from the b position to the c position, pressure oil with sufficient pressure to operate the regulator 24 is supplied from the secondary pipe line 36 to the branch pipe line 38. , the amount of oil discharged from pump D is adjusted between position b and position c. Thereby, the rotational speed of the hydraulic motor C is controlled, and the hoisting and hoisting speeds are controlled.

In this way, the second operation valve 28 switches the hoisting drum 1 between hoisting and hoisting rotation, and the first operation valve 25 switches the power source from the prime mover B to the hydraulic motor C or vice versa. It also controls the speed when the hydraulic motor is driven.
Therefore, when using this winch drive device,
For example, during normal work, high output can be obtained,
By using the prime mover B, which has a strong hoisting force, as the power source, and when performing work that requires speed control in high and low speed ranges, the power source is switched to the hydraulic motor C, which has excellent speed controllability, to improve the work content. It is possible to obtain an ideal driving condition suitable for the following conditions. Moreover, switching of the power source and speed control in the case of hydraulic motor drive can be easily performed by operating only one lever. In addition, in this embodiment, the first power transmission mechanism E _{1 on the side of the prime mover B, which is normally used as the main power source, is a negative type (constantly operating type), and the first power transmission mechanism E 1} on the side of the hydraulic motor C, used as the sub power source, is a negative type (constantly operating type). Since the power transmission mechanism _E2 is a positive type (always inactive), it is easy to use.

The specific structure of the first and second power transmission mechanisms E ₁ and E ₂ may be arbitrarily selected in addition to the drum type clutch mechanism shown in the above embodiment. Furthermore, the first operating valve 25 for switching the power source and the second operating valve 28 for hoisting and lowering switching can also be replaced with various types in carrying out the present invention.

As described above, according to the present invention, there are two types of power sources: a prime mover (diesel engine or electric motor) and a hydraulic motor driven by the prime mover via a pump, and these two power sources can be switched at will. Since both power sources can be used selectively depending on the task, it is possible to obtain a driving state that takes advantage of the strengths of each. Therefore, the working performance of the winch, that is, the hoisting mechanism on which the winch is mounted, can be improved, and the working range can be expanded. Moreover,
The above-mentioned switching operation of the power source can be easily performed only by operating the valve.

[Brief explanation of the drawing]

The figure is a hydraulic circuit configuration diagram showing an embodiment of the present invention. A... Winch, B... Prime mover, C... Hydraulic motor, D... Hydraulic pump, 1... Hoisting drum, 2
...Hoisting shaft, 4...Clutch mechanism forming the hoisting mechanism, 6...Planetary brake mechanism forming the hoisting mechanism, 3...Planetary gear mechanism forming the hoisting mechanism and the hoisting mechanism, E ₁ ...First power transmission mechanism, E ₂ ...
...Second power transmission mechanism, 25...First operating valve for power source switching, 28...Second operating valve for hoisting/lowering switching.

Claims (1)

[Claims] 1 A prime mover as a first power source, a hydraulic motor as a second power source driven by the prime mover via a pump, and the rotation of these prime mover and hydraulic motor is transmitted to the hoisting shaft of the winch drum. a hoisting mechanism that rotates the drum in the hoisting direction, a hoisting mechanism that also rotates the drum in the hoisting direction, and both the first and second power transmission mechanisms. A first operating valve for power switching that operates selectively, and a second operating valve for switching between hoisting and hoisting that selectively operates both the hoisting and hoisting mechanisms. Winch drive device.