JPH0138145Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to winches used in cranes (truck cranes, marine cranes, etc.) The present invention also relates to a winch that transmits power to a drum for winding wire through a clutch.

(Prior Art) An example of a conventional winch of this type is disclosed in Japanese Patent Application Laid-Open No. 162497/1983. In this known winch, the rotational force of a motor (hydraulic motor) is transmitted to a drum shaft for driving a drum via a planetary gear reducer, and then transmitted from the drum shaft via an internally expandable clutch. I try to transmit it to the drum. In this case, the planetary gear reducer part is housed inside the drum body, but in order to make the clutch body larger in diameter (to increase capacity), the internally expanding clutch is placed outside the outer periphery of the drum flange. An outward cylindrical protrusion is formed on the side surface, and the cylindrical protrusion serves as a clutch barrel.

For this reason, this known winch had the following problems.

(1) When assembling the drum shaft, planetary gear reducer, and hydraulic motor, it is necessary to assemble the planetary gear reducer to the drum shaft inside the insidious drum body, and the planetary gear After the reduction gear is assembled to the drum shaft, the hydraulic motor must be assembled to the planetary gear reduction gear, making the assembly work difficult.

(2) In addition to adopting an internally expandable clutch, an outward cylindrical protrusion is formed on the outer surface of the flange at one end of the drum in order to increase its capacity, that is, to increase the diameter of the clutch body. Therefore, the axial and radial dimensions of the drum become large.

(3) Since the internally expandable clutch is provided on the outer surface of the flange at one end of the drum, waterproof measures are required for the clutch.

(Purpose of the invention) In view of the problems of the conventional winches mentioned above, the present invention allows for easy assembly of the drum shaft, planetary gear reducer, motor, etc. It is an object of the present invention to provide a winch that can reduce the size of the clutch and eliminate or simplify waterproofing measures for the clutch.

(Means for Achieving the Object) The present invention is a winch that transmits the rotation of a motor to a wire winding drum via a reducer and a clutch. The motor, the reducer, and the drum shaft for driving the drum are integrally connected to form a drive unit using a planetary gear reducer having a planetary gear mechanism built in the outer case. , a multi-disc clutch is used as the clutch, which includes an inner cylinder with a driving friction plate on the outer circumferential surface and an outer cylinder with a driven friction plate on the inner surface, and the reducer is supported by a pair of left and right winches. It is attached to one of the winch support plates of the plates, and the opposite end of the drum shaft is rotatably supported on the other winch support plate through the drum, and the reducer portion of the drive unit body is rotatably supported by the other winch support plate. The clutch is housed in a space in the drum body from one end of the drum, and the one end of the drum is supported on the outer periphery of the outer case of the reducer, and the clutch is arranged such that at least a portion of the clutch is located inside the drum. The inner cylinder of the clutch is spline-coupled to the drum shaft from the opposite side of the reduction gear at a position housed in the hollow space in the body of the clutch, and the outer cylinder of the clutch and the drum are connected by bolting. It is characterized by being worn.

(Function) The present invention integrates the motor, planetary gear reducer, and drum shaft into a drive unit, thereby assembling these parts (motor, planetary gear reducer, and drum shaft). By using a multi-disc clutch as the clutch and installing the multi-disc clutch with a part of the clutch housed inside the drum body, the clutch can be easily removed from the inside of the drum body. The winch can be constructed compactly by making effective use of space, and waterproofing measures for the clutch can be unnecessary or simplified. Since they are fitted into the cavities of the body of the drum separately from opposite sides, the parts that are handled together during assembly or disassembly of the winch do not become very heavy in terms of weight.

(Embodiment) The winch of the embodiment of the present invention shown in FIG. 1 will be explained. The winch of this embodiment is used for, for example, a truck crane, and is configured to be hydraulically driven.

This winch consists of a wire winding drum 1, a motor (a hydraulic motor is used in this embodiment, hereinafter referred to as the hydraulic motor) 2, a planetary gear reducer 3, and a multi-disc clutch. 4. The main components are a drum shaft 5 for driving the drum 1 and a brake device 6.

The planetary gear reducer 3 includes a planetary gear mechanism (not shown) built in an outer case 21 thereof.

Hydraulic motor 2, planetary gear reducer 3, and drum shaft 5
and are integrally connected to each other to form the drive unit body 10. The drum shaft 5 is also used as the output shaft of the planetary gear reducer 3. Further, the drum shaft 5 and the outer periphery of the outer case 21 of the planetary gear reducer 3 are concentric.

This drive unit body 10 has the drum shaft 5 side inserted into the drum 1 from one side of the drum body 11, and most of the axial length of the planetary gear reducer 3 is inside the drum body 11. It is mounted so that it is accommodated in the empty space 12 of the. Further, this drive unit body 10 is a hydraulic motor of the planetary gear reducer 3.
The end surface of the drum shaft 5 is fixed to one winch support plate 8 (the right side in FIG. The distal end of the drum shaft 5 is supported in a horizontal state by being pivotally attached to the other winch support plate 9 via a bearing 19.

A bearing 1 is provided between the outer peripheral surface of the outer case 21 of the planetary gear reducer 3 and the inner surface of one end side of the drum body 11.
8 is interposed, and one end side of the drum 1 is rotatably supported on the outer peripheral surface of the outer case 21 of the planetary gear reducer 3.

The multi-disc clutch 4 includes an inner cylinder 31 that rotates integrally with the drum shaft 5 through a spline connection 15.
and a large number of (driving side) friction plates 42, 42 fitted to the external gear 41 formed on the outer surface of the inner cylinder 31.
..., an outer cylinder 33 which is coaxial with the inner cylinder 31 and is rotatable relative to the inner cylinder 31, and is fitted into an internal gear 44 formed on the inner surface of the outer cylinder 33. A large number of (driven side) friction plates 43, 43... (arranged alternately with drive side friction plates 42, 42...) are fitted to the outside of the inner cylinder 31 so that the drum shaft 5 can move back and forth in the axial direction. A slide tube 32 that is
Spring receiving member 34 fitted to drum shaft 5
, and springs 35 and 36 interposed between the spring receiving member 34 and the slide cylinder 32 as basic members. Each member such as the inner cylinder 31, slide cylinder 32, spring receiving member 34, and springs 35, 36 is housed inside the outer cylinder 33, and these members are connected to a brake device (this embodiment) which will be described later. The clutch unit body 30 is integrated with the disc rotor 24 (in which a disc brake is employed).

The slide cylinder 32 is connected to the spring receiving member 34 by a connecting pin 37 so as to be non-rotatable with respect to each other and to be movable in the approaching and separating directions. In this way, attach the slide tube 32 to the spring receiving member 34.
The springs 35 and 36 interposed between the two are prevented from being deformed by being connected to the springs 35 and 36 so as to be unrotatable with each other (in other words, so that the two rotate integrally).

The slide tube 32 normally has a spring 3
5 and 36, each drive side friction plate 4 on the inner cylinder 31 side
2, 42... and each driven side friction plate 43 on the outer cylinder 33 side,
43... are biased in the direction in which they are pressed into engagement with each other, that is, in the direction in which the clutch is engaged. Further, a sealed annular oil chamber 38 is formed between the slide tube 32 and the inner tube 31, and an oil passage 39 bored in the drum shaft 5 and the inner tube 31 are connected to the oil chamber 38.
High pressure oil is introduced through a through hole 40 formed in. And the high pressure oil is in the oil chamber 38.
When the slide cylinder 32 is introduced into the clutch (during a clutch disengagement operation), the slide cylinder 32 resists the springs 35 and 36 and moves in the direction of releasing the press-fit engagement between the driving side friction plate 42 and the driven side friction plate 43, that is, when the clutch is released. It is designed so that it can be moved in the direction of departure. Therefore, in this clutch structure, when the clutch is not operated, the inner cylinder side friction plate 4 is moved by the action of the springs 35 and 36.
2, 42... and the outer cylinder side friction plates 43, 43... are always press-fitted and engaged with each other to maintain the engaged state of the clutch, so that if an unexpected problem such as leakage of clutch hydraulic oil occurs, This also has the effect of preventing troubles such as the clutch disengaging and the suspended load inadvertently dropping suddenly.
In addition, in conventional general hydraulically operated clutches, the clutch is configured to connect when pressure oil is supplied, so in the event of an oil leak, the clutch may be inadvertently disengaged. If the brake operation was delayed at that time, there was a danger that the suspended load would fall suddenly.

A flange 45 for mounting the clutch unit body 30 on the drum 1 is integrally formed near the center of the outer circumference of the outer cylinder 33.

A disk rotor 24 is integrally fixed to the outer end surface of the outer cylinder 33 in the axial direction with bolts 25, 25. A bearing 46 is interposed between the inner surface of the disc rotor 24 and the spring receiving member 34. A bearing holding member 47 is attached to the inner surface of the axially inner end of the outer cylinder 33, and a bearing 48 is interposed between the holding member 47 and the outer periphery of the drum shaft 5. In this way, the flange 4 is located near the center of the outer circumference of the outer cylinder 33.
5 is provided, and bearings 46 and 48 are provided on both ends of the outer cylinder 33, so that the load on the drum 1 side is almost evenly distributed to both the bearings 46 and 48, and the deformation of the outer cylinder 33 is prevented. This has the effect of reducing as much as possible.

This clutch unit body 30 is constructed by fitting its distal end side into the inside of the drum body 11 and fitting its inner cylinder 31 to the outside of the drum shaft 5, with its constituent members integrally assembled. The flange 45 on the outer periphery of the outer cylinder 33 is further fixed to the end surface 1a of the drum 1 with bolts 49, 49, thereby attaching the drum 1. At this time, the spring receiving member 34 is fitted to the outside of the drum shaft 5 together with the inner cylinder 31. When the clutch unit body 30 is installed, the end of the clutch unit body 30 on the friction plate installation side is inserted into the drum body 11 to a predetermined depth, thereby making it possible to effectively utilize the empty space within the drum body. At the same time, the friction plate housing part, which is the main part of the clutch, has the effect of making it difficult for rainwater to leak. In this type of multi-disc clutch 4, each of the friction plates 42, 4 on the drive side and the driven side
If the number of clutches 2..., 43, 43... is increased, the torque transmission ability when the clutches are engaged can be increased.
By incorporating the winch into a space within the drum body 11, the number of friction plates can be increased without increasing the external dimensions of the winch.

In addition, in this embodiment, the spring receiving member 3
4 is provided with a wear indicator 51 for displaying the degree of wear of the clutch friction plates 42, 43.
This wear indicator 51 corresponds to the spring receiving member 3.
4 in the axial direction of the drum, and a spring 53 for pressing the indicator member 52 against the slide cylinder 32 side. A tip (left end) 52a of the indicating member 52 is projected further outward from the outer surface of the spring receiving member 34, so that a scale attached to the indicating member tip 52a can be viewed from the outside. . That is, when the clutch friction plates 42 and 43 wear out, the amount of inward displacement of the slide tube 32 increases depending on the degree of wear, and the indicating member 52 is also biased by the spring 53, causing a large displacement inward together with the slide tube 32. Therefore, by reading the scale on the tip end 52a of the indicating member, the clutch friction plate 42,
43 can be detected.
Adjustment when the clutch friction plates 42 and 43 are worn is performed by tightening the bearing 19 and the spacer 5 using a nut 54 screwed onto the shaft end of the drum shaft 5.
This can be done by moving the spring receiving member 34 inward through the spring support member 5, making the adjustment easy.

A foot-operated disc brake 6 is installed near the disc rotor 24 which is integrally fixed to the clutch unit body 30. This disc brake 6 is attached to one winch support plate 9 by a support 7. Incidentally, when the clutch unit body 30 is to be removed from the drum 1 and the drum shaft 5 for repair purposes, for example, the following procedure is used. That is, first, remove the bolts 56 and remove the disc brake 6 from the winch support plate 9.
Next, move the winch support plate 9 from the base to the left in FIG. It is now possible to pull it out.

In addition, in the winch of this embodiment, the hydraulic motor 2
A multi-plate automatic brake (not shown) that is operated in conjunction with the operation of the hydraulic motor 2 is installed around the output shaft of the hydraulic motor 2, and when the hydraulic motor 2 is not operating, the brake is activated by a built-in spring. The hydraulic motor
It acts to release the brake force when the motor 2 is activated. Incidentally, when the suspended load is freely lowered when the hydraulic motor 2 is not operating, that is, when the drum shaft 5 is made unrotatable by the automatic brake,
The connection between the drum 1 and the drum shaft 5 is broken by the clutch 4, and the foot-operated disc brake 6 is operated to control the free descent speed of the suspended load.
It is now possible to read

(Effect of idea) The winch of the present invention has the following effects.

(1) Since the motor 2, planetary gear reducer 3, and drum shaft 5 are integrally connected to form the drive unit body 10, these members (motor, planetary gear reducer, drum shaft) are connected to the drum 1. The work when assembling becomes easier.

(2) A multi-disk type clutch is used as the clutch 4, and a part of the clutch 4 is attached to the drum body 1.
Since the clutch 4 is housed in a hollow space 12 within the clutch 4, rainwater or the like is difficult to enter into the friction plate housing portion, which is the main part of the clutch 4, and waterproof measures for the clutch 4 can be made unnecessary or simplified.

(3) Since the 3 parts of the planetary gear reducer and part of the clutch 4 of the drive unit body 10 are housed in the space 12 in the body 11 of the drum 1, the space 12 in the drum body 11 is accommodated. This allows the winch to be made more compact. Furthermore, the torque transmission force of the winch can be improved by increasing the number of friction plates 42 and 43 without increasing the external dimensions of the winch.

(4) Since the drive unit body 10 and the clutch 4 are fitted into the cavity 12 of the drum 1 from opposite sides in the axial direction of the drum, it is easy to assemble or disassemble the winch. , each member handled integrally (drive unit body 10, clutch unit body 30)
It is not very heavy in terms of weight, and it is easy to handle, making assembly or disassembly work easier.

(5) Since the drum shaft 5 and the inner cylinder 31 of the clutch 4 are connected by the spline connection 15, the drive unit body 10 and the clutch 4 are pushed into the cavity 12 in the body of the drum 1 from both sides to connect them. In such a case, the joining operation can be easily performed.

(6) One end of the drum 1 is rotatably supported on the outer periphery of the outer case 21 of the reducer 3 supported on the winch support plate 8, so the reducer and drum can be individually fixed to the winch support plate. Compared to rotatably supported types, there is no need for alignment adjustment during assembly.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a winch according to an embodiment of the present invention. 1...Drum, 2...Motor, 3...Planetary gear reducer, 4...Clutch, 5...Drum shaft, 10
... Drive unit body, 11 ... Drum body, 12
... Blank space, 31 ... Inner cylinder, 33 ... Outer cylinder, 42,
43...Friction plate.

Claims (1)

[Scope of utility model registration request] This winch is configured to transmit the rotation of a motor 2 to a wire winding drum 1 via a reducer 3 and a clutch 4, and the reducer 3 includes a planetary planet inside a cylindrical outer case 21. The motor 2, the reducer 3, and the drum shaft 5 for driving the drum are integrally connected to form a drive unit body 10 using a planetary gear reducer having a built-in gear mechanism. 4, a multi-plate disc type clutch is used, which is equipped with an inner cylinder 31 having a driving friction plate 42 on its outer circumferential surface and an outer cylinder 33 having a driven friction plate 43 on its inner surface, and the reducer 3 is connected to a left and right pair. The winch support plate 8 is attached to one of the winch support plates 8 and 9, and the end of the drum shaft 5 on the side opposite to the reducer is connected to the drum 1.
The drive unit body 10 is rotatably supported by the other winch support plate 9, and the reducer 3 portion of the drive unit body 10 is housed in the space 12 in the drum body 11 from one end of the drum 1. Moreover, one end of the drum 1 is rotatably supported on the outer periphery of the outer case 21 of the reducer 3, and the clutch 4 is mounted so that at least a part of the clutch 4 is located inside the body of the drum 1. At the position housed in the clutch 12, the inner cylinder 31 of the clutch 4 is connected to the drum shaft 5 by a spline connection 15 from the side of the drum shaft 5 opposite to the reduction gear, and further the outer cylinder 33 of the clutch 4 and the drum 1 are connected. A winch characterized by being connected and attached by bolting.