JPH04122584U - winch equipment - Google Patents

Abstract

(57) [Summary] [Purpose] By using an electrical system with a high degree of freedom in terms of arrangement, we aim to simplify the hydraulic system and improve responsiveness. [Configuration] The main and auxiliary brake cylinders 21 and 22 are expanded and contracted by switching only the main and auxiliary brake solenoid valves 17' and 18', respectively, and the power supply 37 is connected to the main and auxiliary brake solenoid valves 17' and 18'. A main pressure switch 39 that is operated by the hydraulic pressure generated when the hoisting motor 2 is driven is provided in the middle of the electrical wiring 38, and between the main pressure switch 39 in the middle of the electrical wiring 38 and the main and auxiliary brake solenoid valves 17' and 18'. are provided with main and auxiliary brake pressure switches 40 and 41, which are operated by hydraulic pressure generated when rotation is transmitted from the drive shaft 3 to the main and auxiliary hoisting drums 4 and 5 by the main and auxiliary clutch cylinders 12 and 13, respectively.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a winch device.

0002

[Conventional technology]

Generally speaking, construction machinery such as crawler cranes has the ability to raise and lower the boom and raise and lower the hook. A winch device is provided for hoisting and lowering the wire rope for this purpose.

0003 The conventional winch device, as shown in FIG. A drive shaft 3 is connected to a hoisting motor 2 that is driven in a direction via a reducer (not shown). The main hoisting drum 4 and the auxiliary hoisting drum 5 are rotatably fitted onto the drive shaft 3. By switching the clutch valve 6, the main clutch shoe 8 expands and contracts to the main hoisting drum 4. The rotation of the drive shaft 3 is controlled by the main clutch drum part 10 by pressing it against the inner circumferential surface of the main clutch drum part 10. The main clutch cylinder 12 that transmits the transmission to the upper drum 4 is connected to the main clutch cylinder 12 fitted to the drive shaft 3. Attach to clutch disc 14 and switch main valve 16 and main brake valve 17 The main brake shoe 19 is pushed onto the outer circumferential surface of the main clutch drum portion 10. A main brake cylinder 21 is arranged to brake the main hoisting drum 4 by braking. At the same time, the auxiliary clutch shoe 9 expands and contracts by switching the auxiliary clutch valve 7. Driven by pressing against the inner peripheral surface of the auxiliary clutch drum portion 11 of the auxiliary hoisting drum 5 The auxiliary clutch cylinder 13 that transmits the rotation of the shaft 3 to the auxiliary hoisting drum 5 is connected to the drive shaft. 3, the main valve 16 and the auxiliary brake. By switching the valve 18, the auxiliary brake shoe 20 expands and contracts to the auxiliary clutch drum. Auxiliary brake that brakes the auxiliary hoisting drum 5 by pressing against the outer peripheral surface of the section 11 It is configured by disposing a cylinder 22.

0004 The main valve 16 is held at the braking position A when the hoisting motor 2 is not driven. , when the hoisting motor 2 is driven, a shuttle valve 23 provided in parallel with the hoisting motor 2 The hydraulic pressure generated in the part is introduced through the pilot pipe 24 and the brake is turned to the brake release position B. It is designed to be replaced.

[0005] Further, the main brake valve 17 is not controlled when the main clutch cylinder 12 is not operated. When the main clutch cylinder 12 is operated, the main clutch cylinder 12 is held in the moving position A. The hydraulic pressure introduced into the brake cylinder 12 is introduced via the pilot pipe 25 to the brake release position B. At the same time, the auxiliary brake valve 18 switches to the auxiliary clutch cylinder. It is held at braking position A when the cylinder 13 is not activated, and when the auxiliary clutch cylinder 13 is activated. In this case, the hydraulic pressure introduced into the auxiliary clutch cylinder 13 is passed through the pilot pipe 26. It is designed so that the brake is introduced and switched to the brake release position B.

[0006] In the figure, 27, 28, 29 are hydraulic power sources, 30 is an accumulator, 31, 32, 33, 34, and 35 are tanks, and 36 is when the switching valve 1 is in the neutral position while unloading the load. This is a counterbalance valve to prevent the load from falling suddenly when set to N.

[0007] The switching valve 1 is switched from the neutral position N to the winding position U or the winding down position D. In other words, the hoisting motor 2 rotates in the required direction, the drive shaft 3 also rotates, and the shuttle The hydraulic pressure generated in the main valve 23 passes through the pilot pipe 24 to the main valve 16. The main valve 16 is switched from the brake position A to the brake release position B.

[0008] If the main clutch valve 6 is switched from the non-operating position E to the operating position F in this state, , the main clutch cylinder 12 is in communication with the hydraulic power source 28 and extended, and the main clutch cylinder 12 The shoe 8 is pressed against the inner circumferential surface of the main clutch drum portion 10, and the main clutch The hydraulic pressure introduced into the brake cylinder 12 is transferred to the main brake valve via the pilot line 25. The main brake valve 17 is guided by the brake valve 17 from the brake position A to the brake release position B. The main brake cylinder 21 is connected to the hydraulic power source 29 and contracts. The main brake shoe that had been pressed against the outer peripheral surface of the main clutch drum section 10 until then 19 separates from the outer peripheral surface of the main clutch drum part 10, the braking state is released, and the main hoisting The drum 4 rotates together with the drive shaft 3.

[0009] Similarly, when the auxiliary clutch valve 7 is switched from the non-operating position E to the operating position F, The auxiliary clutch cylinder 13 is in communication with the hydraulic power source 28 and extends. The auxiliary clutch 9 is pressed against the inner peripheral surface of the auxiliary clutch drum portion 11, and the auxiliary clutch The hydraulic pressure introduced into the brake cylinder 13 is transferred to the auxiliary brake valve via the pilot pipe 26. The auxiliary brake valve 18 is switched from the braking position A to the braking release position B. Instead, the auxiliary brake cylinder 22 is in communication with the hydraulic power source 29 and contracts. The auxiliary brake shoe 2 that had been pressed against the outer peripheral surface of the auxiliary clutch drum part 11 until now 0 separates from the outer peripheral surface of the auxiliary clutch drum part 11, the braking state is released, and the auxiliary hoisting upper drive The ram 5 rotates together with the drive shaft 3.

0010

[Problem that the idea aims to solve]

However, in the winch device as described above, the main and auxiliary brake valves 17, 1 In addition to the main valve 8, a main valve 16 is required, and the number of hydraulic piping increases accordingly. Therefore, there are greater restrictions on the layout of the hydraulic system, and the main valve 16 Also, due to the arrangement of the main and auxiliary brake valves 17, 18, the pilot pipes 24, 25, 2 If it is necessary to lengthen the switching valve 1 and the main and auxiliary clutch valves 6, , 7, the main valve 16 and the main and auxiliary brake valves 17 and 18 are switched. There was a problem that there was a delay in response.

[0011] In view of these circumstances, the present invention utilizes an electrical system with a high degree of freedom in terms of arrangement. We provide a winch device that can simplify the hydraulic system and improve responsiveness. This is what I am trying to do.

0012

[Means to solve the problem]

The present invention includes a hoisting motor that is driven in forward and reverse directions by switching a switching valve; a drive shaft rotationally driven by the hoisting motor; a plurality of hoisting drums rotatably fitted to the drive shaft; It expands and contracts by switching the clutch valve, and the rotation of the drive shaft is controlled via the clutch shoe. a plurality of clutch cylinders capable of transmitting information to the hoisting drum; The brake system expands and contracts by switching the brake solenoid valve to brake the hoisting drum. a plurality of brake cylinders capable of being actuated via a brake; Provided in the middle of electrical wiring connecting the power supply and the brake electromagnetic valve, and A main pressure switch operated by the hydraulic pressure generated when the upper motor is driven, Between the main pressure switch and the brake solenoid valve in the middle of the electrical wiring. When the rotation is transmitted from the drive shaft to the hoisting drum by the clutch cylinder, Operated by the generated hydraulic pressure, the brake solenoid valve can be switched to the brake release position. with multiple brake pressure switches It is characterized by having the following.

[0013]

[Effect]

Therefore, by switching the switching valve, the hoisting motor is rotated and the drive shaft is rotated. Then, the generated hydraulic pressure activates the main pressure switch, and in this state the clutch bar is When the clutch cylinder is operated by switching the lubricant, the clutch cylinder The hydraulic pressure introduced into is guided to the brake pressure switch, and the brake pressure switch When activated, the brake solenoid valve switches to the brake release position, and the brake cylinder is activated, the braking state is released, and the hoisting drum rotates together with the drive shaft.

[0014]

【Example】

Embodiments of the present invention will be described below based on the drawings.

[0015] Figure 1 shows one embodiment of the present invention, and parts in the figure with the same symbols as in Figure 2 are the same. The basic configuration is the same as the conventional one shown in Figure 2, but this implementation The feature of this example is that, as shown in Fig. 1, the main brake cylinder 21 is In addition to expanding and contracting by switching only the solenoid valve 17', the auxiliary brake The cylinder 22 is expanded and contracted by switching only the auxiliary brake solenoid valve 18'. Electrical wiring 38 connects the power source 37 and the main and auxiliary brake solenoid valves 17', 18'. The electrical wiring 38 is connected to the hydraulic pressure generated when the hoisting motor 2 is driven. A main pressure switch 39 is provided which operates more than the main pressure switch 39, and The main clutch is connected between the main pressure switch 39 and the main brake solenoid valve 17'. Hydraulic pressure generated when rotation is transmitted from the drive shaft 3 to the main hoisting drum 4 by the cylinder 12 A main brake pressure switch 40 is provided which is activated by the electrical wiring 38. Between the main pressure switch 39 and the auxiliary brake solenoid valve 18' on the way , when the rotation is transmitted from the drive shaft 3 to the auxiliary hoisting drum 5 by the auxiliary clutch cylinder 13. The main feature is that an auxiliary brake pressure switch 41 is provided which is operated by the hydraulic pressure generated in the brake system.

[0016] The main pressure switch 39 is kept in the off state when the hoisting motor 2 is not driven. When the hoisting motor 2 is driven, a shuttle valve installed in parallel with the hoisting motor 2 The hydraulic pressure generated in section 23 is introduced through pilot pipe 24' and turned on. It is designed to be replaced.

[0017] Further, the main brake pressure switch 40 is activated when the main clutch cylinder 12 is not operated. When the main clutch cylinder 12 is activated, the main clutch is held in the off state. The hydraulic pressure introduced into the cylinder 12 is introduced through the pilot pipe 25' to turn it on. On the other hand, the auxiliary brake pressure switch 41 switches to the auxiliary clutch. When the cylinder 13 is inactive, it is held in the off state, and the auxiliary clutch cylinder 13 is activated. During operation, the hydraulic pressure introduced into the auxiliary clutch cylinder 13 is passed through the pilot pipe 26'. It is designed to be introduced via the switch and switched to the on state.

[0018] Next, the operation of the above embodiment will be explained.

[0019] Switch the switching valve 1 from the neutral position N to the hoisting position U or the hoisting position D When the hoisting motor 2 rotates in the required direction, the drive shaft 3 also rotates, and the shuttle valve The hydraulic pressure generated in the section 23 is passed through the pilot line 24' to the main pressure switch 3. 9, the main pressure switch 39 is switched from the off state to the on state.

[0020] If the main clutch valve 6 is switched from the non-operating position E to the operating position F in this state, , the main clutch cylinder 12 is in communication with the hydraulic power source 28 and extended, and the main clutch cylinder 12 The shoe 8 is pressed against the inner circumferential surface of the main clutch drum portion 10, and the main clutch The hydraulic pressure introduced into the brake cylinder 12 is applied to the main brake via the pilot pipe 25'. The main brake pressure switch 40 is turned on from the off state by the pressure switch 40. state, and the main brake solenoid valve 17' moves from the braking position A to the braking release position B. The main brake cylinder 21 is connected to the hydraulic power source 29 and contracts. The main brake shoe that had been pressed against the outer peripheral surface of the main clutch drum section 10 until then 19 separates from the outer peripheral surface of the main clutch drum part 10, the braking state is released, and the main hoisting The drum 4 rotates together with the drive shaft 3.

[0021] Similarly, when the auxiliary clutch valve 7 is switched from the non-operating position E to the operating position F, The auxiliary clutch cylinder 13 is in communication with the hydraulic power source 28 and extends. The auxiliary clutch 9 is pressed against the inner peripheral surface of the auxiliary clutch drum portion 11, and the auxiliary clutch The hydraulic pressure introduced into the brake cylinder 13 is applied to the auxiliary brake pressure via the pilot pipe 26'. The auxiliary brake pressure switch 41 changes from the off state to the on state. The auxiliary brake solenoid valve 18' is switched from the braking position A to the braking release position B. Instead, the auxiliary brake cylinder 22 is in communication with the hydraulic power source 29 and contracts. The auxiliary brake shoe 2 that had been pressed against the outer peripheral surface of the auxiliary clutch drum part 11 until now 0 separates from the outer peripheral surface of the auxiliary clutch drum part 11, the braking state is released, and the auxiliary hoisting upper drive The ram 5 rotates together with the drive shaft 3.

[0022] In this way, the number of valves can be reduced compared to conventional systems, simplifying the hydraulic system. On the other hand, each pressure switch 39, 40, 41 is small and there are few restrictions on arrangement, and It is possible to install the shuttle valve 23 near the main and auxiliary clutch valves 6 and 7. Therefore, the pilot pipes 24', 25', and 26' can be shortened, improving responsiveness. can be improved.

[0023] Note that the winch device of the present invention is not limited to the above-mentioned embodiments. It can also be applied to winch devices with two or more hoisting drums arranged on one drive shaft. Various other changes may be made without departing from the gist of the invention. Of course.

[0024]

[Effect of the idea]

As explained above, the winch device of the present invention has a high degree of freedom in terms of placement. By using an electrical system, it is possible to simplify the hydraulic system and improve responsiveness. It has the excellent effect of being able to

[Brief explanation of drawings]

FIG. 1 is an overall system diagram of an implementation system of the present invention.

FIG. 2 is an overall system diagram of a conventional example.

[Explanation of symbols]

1 Switching valve 2 Hoisting motor 3 Drive shaft 4 Main hoisting drum (hoisting drum) 5 Auxiliary hoisting drum (hoisting drum) 6 Main clutch valve (clutch valve) 7 Auxiliary clutch valve (clutch valve) 8 Main clutch shoe (Clutch shoe) 9 Auxiliary clutch shoe (Clutch shoe) 12 Main clutch cylinder (Clutch cylinder) 13 Auxiliary clutch cylinder (Clutch cylinder) 17' Main brake solenoid valve (Brake solenoid valve) 18' Auxiliary brake solenoid valve (Brake solenoid valve) 19 Main brake shoe (brake shoe) 20 Auxiliary brake shoe (brake shoe) 21 Main brake cylinder (brake cylinder) 22 Auxiliary brake cylinder (brake cylinder) 37 Power supply 38 Electrical wiring 39 Main pressure switch 40 Main brake pressure switch (brake pressure switch) ) 41 Auxiliary brake pressure switch (brake pressure switch) B Brake release position

Claims (1)

[Scope of utility model registration request] 1. A hoisting motor driven in forward and reverse directions by switching a switching valve, a drive shaft rotationally driven by the hoisting motor, and a plurality of hoisting motors rotatably fitted on the drive shaft. A drum, a plurality of clutch cylinders that expand and contract by switching a clutch valve and can transmit the rotation of the drive shaft to the hoisting drum via a clutch shoe, and a brake shoe that expands and contracts by switching a brake electromagnetic valve to brake the hoisting drum. a plurality of brake cylinders that can be operated via a main pressure switch, which is provided in the middle of electrical wiring connecting a power source and the brake electromagnetic valve, and is operated by the hydraulic pressure generated when the hoisting motor is driven; A plurality of brake electromagnetic valves are provided between the main pressure switch and the brake electromagnetic valve, and are actuated by the hydraulic pressure generated when rotation is transmitted from the drive shaft to the hoisting drum by the clutch cylinder, and can switch the brake electromagnetic valve to a brake release position. A winch device comprising a brake pressure switch.