JPH0380716B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a rope winch suitable for use as a winch for elevating the boom of crawler cranes, pile drivers, etc., for example.

[Prior art]

Generally, a rope winch has a drum with a rope wound around a winding drum, a drive motor such as a hydraulic motor, and a drum drive device consisting of a speed reducer, and reduces the rotational output of the drive motor. It is configured to rotate and drive the drum at a reduced speed through a machine. The above-mentioned rope winch equipped with a reduction gear made of a planetary gear mechanism as a drum drive device is known, for example, as disclosed in Japanese Patent Application Laid-open No. 52-88953 (hereinafter referred to as prior art).

The rope winch according to the above-mentioned prior art includes a drum rotatably supported by a support frame, an exterior cover located on one side of the drum and fixed to the support frame, and a drum driving motor attached to the exterior cover. a gear casing member disposed in a coaxial cylindrical shape within the drum and rotatably supported by the exterior cover; a planetary gear reduction device that reduces the rotational output from a motor in two stages to decelerate and rotate a gear casing member; a flange-shaped inner ring protruding radially inward from the inner wall of the drum; and the gear casing member. It is composed of a flange-shaped outer ring that projects radially outward from the outer wall of the gear casing member, and a connecting member that fixes the inner ring and the outer ring. The signal is transmitted to the drum via the

However, the rope winch according to the prior art described above has the following drawbacks.

That is, the drum and the gear casing member are arranged in a coaxial cylindrical shape, and the drum side is provided with an inner ring that protrudes radially inward, and the gear casing member side is provided with an outer ring that protrudes radially outward. By providing and fixing these with connecting members,
The decelerated rotation of the gear casing member is transmitted to the drum. For this reason, firstly, a large space is required between the drum and the gear casing member, so the diameter of the winding drum of the drum becomes large, and if the input torque from the drive motor is the same, the winding drum The disadvantage is that the rope traction force (line pull force) for pulling the rope is smaller than those with a smaller diameter. Secondly, since the diameter of the winding drum of the drum increases, the weight of the drum increases and the overall shape of the rope winch increases in size. Thirdly, connecting members such as an outer ring, an inner ring, and bolts are required to fix the drum and the gear casing member, so the number of parts is large and the processability and assemblability are poor. There is.

[Purpose of the invention]

The present invention was made in view of the drawbacks of the prior art described above, and by making it possible to reduce the diameter of the winding body of the drum,
It is an object of the present invention to provide a rope winch that can increase rope traction force for the same input torque.

[Structure of the invention]

In order to achieve the above object, the present invention adopts a configuration including a pair of mounting members located on the left and right, and a cylindrical shape that is rotatably supported by each mounting member via a bearing, and for winding a rope. A rope winding drum having a winding drum; a drive motor provided on one attachment member for rotationally driving the drum;
A planetary gear reduction device is provided in the drum and includes a plurality of planetary gear reduction stages to reduce the output rotation of the drive motor and transmit it to the drum, and each stage of the planetary gear reduction device The planetary gear reduction stage consists of a sun gear, a planetary gear that meshes with the sun gear and the internal gear, and a carrier that supports the planetary gear and transmits the revolution of the planetary gear to the next stage sun gear. , and a rope winch in which a carrier of a final stage planetary gear reduction stage is fixed to the one mounting member, wherein the internal gear is provided on the inner peripheral surface of the winding drum of the drum, and the internal gear is The planetary gear of each planetary gear reduction stage is configured as a common internal gear that meshes with each other.

[Effect]

With this configuration, the common internal gear constitutes a part of the planetary gear reduction device, and the planetary gear of each planetary gear reduction stage meshes with the sun gear of each stage and the common internal gear, and rotates. Moreover, since the common internal gear is formed on the inner peripheral surface of the drum, the diameter of the drum can be reduced.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

In the drawings, 1 indicates a support frame;
Legs 1A and 1B are provided on both sides of the support frame 1.
is erected, a cylindrical first mounting member 2 is fixed to one leg 1A via a bolt 3, and a thin plate-shaped second mounting member 4 is fixed to the other leg 1B.
are fixed via bolts 5. 6 is a hydraulic motor as a drive motor;
is fixed to the side surface of the first mounting member 2 via bolts 7. Then, the output shaft 6 of the hydraulic motor 6
A is provided to protrude into the first mounting member 2.

Reference numeral 8 denotes a rope winding drum disposed between the first and second attachment members 2 and 4, and the drum 8 includes a cylindrical winding trunk 8A and a diameter at both ends of the winding trunk 8A. It is composed of peripheral wall portions 8B and 8C formed in the direction. Reference numeral 9 denotes a cover member for oil-tightly covering the right side surface of the drum 8, and the cover member 9 is attached to the right side surface of the drum 8 via bolts. 10 indicates the first mounting member 2 and the drum 8.
11 indicates a bearing provided between the second mounting member 4 and the cover member 9, and the assembly of the drum 8 and cover member 9 supports each of the bearings 10, 11. via the first and second mounting members 2,
4 is rotatably supported.

12 is an internal gear formed on the inner surface side of the drum section 8A of the drum 8 and located on the cover member 9 side;
The internal gear 13 is connected to each reduction stage 13A, 13, which will be described later.
This is a common internal gear that meshes with the planetary gears 16 and 20 of B, respectively. 13 is a planetary gear reduction device disposed in the drum 8, and the internal gear 1
2 constitutes a part of the planetary gear reduction device 13.
The output rotation from the output shaft 6A of the hydraulic motor 6 is reduced by a predetermined reduction ratio by the planetary gear reduction device 13, and the drum 8 is directly reduced in rotation by the internal gear 12. has been done.

Here, the planetary gear reduction gear 13 includes two planetary gear reduction stages 13A and 13B. First, the first stage planetary gear reduction stage 13A has one end connected to the motor 6.
A spline shaft 14 is spline-coupled to the output shaft 6A of the drum 8 and has the other end extending along the axis of the drum 8 toward the cover member 9; a first sun gear 15 and an internal gear 1 between the sun gear 15 and the drum 8;
2 and one or more first planetary gears 16 disposed on the circumferential surface of the sun gear 15 to mesh with the sun gear 15. Thereby, when the first sun gear 15 is rotated via the spline shaft 14, the first sun gear 15 is rotated via the spline shaft 14.
The planetary gear 16 meshes with the internal gear 12 and rotates on its own axis, while also revolving around the sun gear 15. The first planetary gear 16 is rotatably supported by a pin 17, and a movable carrier 18 is fixedly provided to the pin 17. As a result, the first
Only the revolution of the planetary gear 16 is transmitted to the carrier 18, and the first stage of deceleration is performed.

On the other hand, the second planetary gear reduction stage 13B includes a second sun gear 19 that meshes with the movable carrier 18 and transmits only the revolution of the first planetary gear 16, and a second sun gear 19 that is connected between the sun gear 19 and the drum 8. One or more second planetary gears 20 provided around the sun gear 19 to mesh with the gear 12, a pin 21 that rotatably supports the planetary gear 20, and a pin 21 for attaching the pin 21. The first support member 2 via the bolt 22
A fixed carrier 23 is fixed to the right end surface of the carrier. As a result, the second sun gear 1
9 is rotated by the movable carrier 18, the second planetary gear 20 meshes with the sun gear 19 and the internal gear 12 of the drum 8 and rotates. However, the second planetary gear 20 is connected to the fixed carrier 23 via the pin 21 in the circumferential direction (i.e., in the direction of revolution).
Since the positioning of the planetary gear 20 is performed, the planetary gear 20
As the drum 8 rotates around the planetary gear 20,
revolves, and second-stage deceleration is performed.

Next, 24 is a multi-disc brake device located within the first mounting member 2, and the brake device 2
4 are brake plates 25, 25, . . . spline-connected in multiple stages to the spline shaft 14, and brake plates 26, 26, . . . The brake plates 25, 26 are arranged alternately, and by moving these plates toward and away from each other, braking and braking can be performed.

Further, 27 is a stopper located on the right end side of the brake plate 26 and provided on the right end side of the first mounting part 2, and 28 is a stopper located on the left end side of the brake plate 26 and provided in the first mounting member 2. The movably provided piston 29 is a disc spring that constantly presses the piston 28 to the right in the figure.
By being clamped between the spline shaft 14 and the first sun gear 15 integral with the spline shaft 14, a braking action is provided to stop the rotation of the spline shaft 14 and the first sun gear 15 integral therewith.

Furthermore, 30 is provided between the piston 28 and the inner circumferential surface of the first mounting member 2, and a spline 2
A spacer 31 is in an annular shape defined by the spacer 30, the piston 28, and the inner circumferential surface of the first mounting member 2; The hydraulic pressure chamber 32 indicates an oil passage which is bored in the casing of the hydraulic motor 6 and introduces external hydraulic pressure into the hydraulic pressure chamber 31. By supplying the pressure to the pressure chamber 31, the piston 28 is displaced to the left in the figure against the disc spring 29, and the braking by the brake plates 25 and 26 can be released.

Therefore, in this embodiment, the multi-disc brake device 24 is configured as a negative brake device including brake plates 25, 26, a stopper 27, a piston 28, a disc spring 29, a hydraulic chamber 31, an oil passage 32, and the like.

Further, reference numeral 33 denotes a rope that is wound around the winding trunk 8A of the drum 8, and the proximal end of the rope 33 is inserted into a tapered hole 34 drilled in the winding trunk 8A, and is engaged by a cotter 35. is configured to be stopped.

In the figure, reference numeral 36 indicates an engaging pawl formed on the end surface of the peripheral wall portion 8B of the drum 8, and 37 a locking device consisting of a ratchet, etc., which is provided on the support frame and locks the drum 8 by engaging with the engaging pawl 36. shows. Further, 38 is a sealing member for preventing the lubricating oil in the drum 8 from leaking, and the sealing member 38 is located outside the bearing 10 and is disposed between the first mounting member 2 and the drum 8. It is set up.

The present embodiment is constructed as described above, but the rope 33 whose base end is wound around the drum 8 is connected to the boom of a crawler crane, for example, and by rotating the drum 8, It is used to raise and lower the boom while winding or unwinding the rope 33 around the drum 8.

However, in order to operate the rope winch according to this embodiment, the engagement between the engagement pawl 36 for locking the drum 8 and the locking device 37 is first released.
Next, in order to release the brake of the multi-disc brake device 24, hydraulic pressure is supplied from the oil passage 32 to the hydraulic pressure chamber 31, the piston 28 is displaced to the left in the figure against the disc spring 29, and the brake is released. state. When the hydraulic motor 6 is driven in this state to rotate its output shaft 6A, the rotation is caused by the first stage consisting of the spline shaft 14, the first sun gear 15, the first planetary gear 16, the internal gear 12, etc. The first planetary gear 16 is decelerated at a predetermined reduction ratio by the planetary gear reduction stage 13A, and only the revolution of the first planetary gear 16 is transmitted to the movable carrier 18. on the other hand,
Since the movable carrier 18 is meshed with the second sun gear 19, the rotation from the movable carrier 18 consists of the second sun gear 19, the second planetary gear 20, the fixed carrier 23, the internal gear 12, etc. The drum 8 is again decelerated at a predetermined reduction ratio by the second planetary gear reduction stage 13B, and the drum 8, which is integrated with the internal gear 12, revolves around the second planetary gear 20. As a result,
The rotation of the hydraulic motor 6 is transmitted from its output shaft 6A to the drum 8 via the multi-stage planetary gear reduction device 13, and the rope 33 is wound or rewound.

In this embodiment, an internal gear 12 is formed on the inner peripheral surface side of the drum section 8A of the drum 8, and the internal gear 12 is connected to the first and second planetary gear reduction stages 13.
A, 13B, the winding drum part 8A is smaller than that of the prior art described above.
The outer diameter of can be reduced. Therefore, when the output torque of the hydraulic motor 6 is set to the same conditions as those of the prior art, the rope traction force can be increased by the amount that the outer diameter of the winding trunk 8A is smaller. Further, since the internal gear 12 can be directly provided within the drum 8, the rope winch can be made smaller and lighter by an amount corresponding to the smaller outer diameter of the drum 8. Furthermore, since the number of parts is reduced compared to the prior art, workability and assemblability are improved, and manufacturing is possible at low cost.

In the embodiment, the planetary gear reduction gear 13 has been described as being composed of two planetary gear reduction stages 13A and 13B, but if the internal gear 12 is common, a planetary gear reduction gear consisting of three or more stages can be formed. It may be used.

Furthermore, in the embodiment, it has been described that a multi-plate brake device consisting of a negative brake is provided in the drum 8, but this brake device is provided with a separate brake drum continuous to the drum 8, and the outer periphery of the brake drum is covered with, for example, a band brake. Alternatively, a disc brake device may be used in which a disc is formed in a part of the drum 8 and the disc is pressed by a pair of disc pads.

〔Effect of the invention〕

The rope winch according to the present invention is as described in detail above, and the internal gear forming a part of the plurality of planetary gear reduction stages is formed on the inner circumferential surface of the drum. Since the gear is configured as a common internal gear in which the planetary gears of each of the planetary gear reduction stages mesh with each other, a single internal gear can be a part of a plurality of planetary gear reduction stages, and the internal gear Since the gear is formed on the inner peripheral surface of the drum, the diameter of the winding drum of the drum can be made smaller than that of the conventional technology, increasing the rope pulling force, and creating a rope that is small, lightweight, and has a small number of parts. It has the following effects, such as being able to manufacture winches.

[Brief explanation of drawings]

The figure is a longitudinal sectional view showing an embodiment of the present invention. 1...Support frame, 2, 4...Mounting member, 6...Hydraulic motor, 8...Drum, 8A...
Winding drum section, 9... Cover member, 10, 11... Bearing, 12... Internal gear, 13... Planetary gear reduction device, 13A... First stage planetary gear reduction stage, 13B
... Second stage planetary gear reduction stage, 14 ... Spline shaft, 15 ... First sun gear, 16 ... First planet gear, 17, 21 ... Pin, 18 ... Movable carrier, 19 ... ...Second sun gear, 20...Second
planetary gear, 23... fixed carrier, 24... multi-plate brake device, 25, 26... brake plate, 2
7... Stopper, 28... Piston, 29... Belleville spring, 30... Spacer, 31... Hydraulic pressure chamber, 32
...Oil road, 33...rope.

Claims (1)

[Claims] 1 A pair of mounting members located on the left and right, a rope winding drum rotatably supported by each mounting member via bearings and having a cylindrical winding drum for winding the rope, and a rope winding drum that rotates the drum. a planetary gear consisting of a drive motor provided on one mounting member for driving, and a plurality of planetary gear reduction stages provided within the drum to reduce the output rotation of the drive motor and transmit it to the drum; A gear reduction device, each planetary gear reduction stage of the planetary gear reduction device includes a sun gear, a planetary gear that meshes with the sun gear and the internal gear, and a planetary gear that supports the planetary gear and that supports the planetary gear. and a carrier for transmitting the revolution of the gear to the next stage sun gear, and the carrier of the final stage planetary gear reduction stage is fixed to the one mounting member, wherein the internal gear is attached to the drum. 1. A rope winch, which is provided on the inner peripheral surface of the winding drum, and wherein the internal gear is configured as a common internal gear in which the planetary gears of each of the planetary gear reduction stages mesh with each other.