JP5385601B2 - crane - Google Patents

Description

The present invention relates to a crane .

  A device in which a winch drum is mounted on a lower portion of a boom pivotally supported on a crane body is known (see, for example, Patent Document 1). In the device described in Patent Document 1, a drum is disposed along the width direction of the boom so as to be within the width of the boom, and a motor driving device for driving the drum is attached to an axial end portion of the drum.

JP 2003-238082 A

  By the way, some large cranes or the like have a plurality of winch drums arranged side by side in the length direction of the boom in order to improve transportability and assemblability. In such a model, it is difficult to efficiently arrange a plurality of drums in a limited space.

A crane according to the present invention includes a swinging body, a boom pivotally supported on the swinging body, a rotating shaft of a winch drum mounted on the boom along the width direction of the boom, and a longitudinal direction of the boom. At least first and second hoisting winch devices arranged side by side, each of the first and second hoisting winch devices having a first attachment portion at one axial end and the other axial end. A winch drum provided with a second mounting part at the part, a drum driving device attached to the first mounting part for driving the winch drum, and a bearing attached to the second mounting part for rotatably supporting the winch drum The first mounting portion is configured to be capable of mounting a bearing device, the second mounting portion is configured to be capable of mounting a drum driving device, and the first winch device is configured in the width direction of the boom. On one side The ram drive unit respectively have a bearing device in the other widthwise side, the second winch device, the bearing device on one widthwise side of the boom, that each have a drum driving device in the width direction of the other side Features.
The crane according to the present invention includes a swinging body, a boom pivotally supported by the swinging body, a rotating shaft of a winch drum mounted on the swinging body along the width direction of the swinging body, and the swinging body. At least first and second hoisting winch devices arranged side by side in the front-rear direction, and each of the first and second hoisting winch devices has a first attachment portion at one end in the axial direction. A winch drum having a second mounting portion provided at the other end in the axial direction, a drum driving device that is mounted on the first mounting portion and drives the winch drum, and is mounted on the second mounting portion and rotates the winch drum The first mounting portion is configured to be capable of mounting the bearing device, the second mounting portion is configured to be capable of mounting a drum driving device, and the first winch device is , The width direction of the swivel body The second winch device has a bearing device on one side in the width direction and a drum driving device on the other side in the width direction. It is characterized by having .
In each of the cranes described above, it is preferable that the first attachment portion and the second attachment portion in the first and second winch devices each have a fitting portion into which the bearing device is fitted.

  According to the present invention, since the drum driving device and the bearing device can be attached to both ends of the winch drum in the axial direction, the freedom of layout of the drum is widened, and a plurality of drums are efficiently arranged in a limited space. can do.

Hereinafter, an embodiment of a crane according to the present invention will be described with reference to FIGS.
Figure 1 is an external side view of the engagement torque lane to the present embodiment. The crane shown in the figure is, for example, a large crane having a maximum suspension load of 500 t class, and is supported on the traveling body 1, the revolving body 2 that is turnably mounted on the traveling body 1, and the revolving body 2 so as to be able to move up and down. And a boom 3. A driver's cab 4 is mounted on the front end of the revolving structure 2 and a counterweight 5 is supported on the rear end. A live mast 6 is pivotally supported behind the boom support portion of the revolving structure 2 so as to be rotatable in the front-rear direction.

  A undulation drum 7 is mounted on the rear end of the revolving unit 2. A hoisting rope 7a is wound around the hoisting drum 7, and the hoisting rope 7a is looped around a sheave at the tip of the live mast. The live mast tip and the boom tip are connected by a pendant link 8, and the boom 3 is lifted by driving the hoisting drum 7.

  The boom 3 is configured by connecting a lower boom 3a, an upper boom 3b, and a connecting boom 3c. A plurality of winch drums 9 and 10 constituting the hoisting winch device 20 of the present embodiment are mounted on the lower boom 3a. Each winch drum 9, 10 is disposed with its rotation axis directed in the width direction of the boom 3, and each drum 9, 10 is disposed side by side in the longitudinal direction of the boom 3. Winch ropes 9a and 10a are wound around the winch drums 9 and 10, respectively. Each of the winch ropes 9a and 10a is connected to a hook 14 through a sheave 11 and 12 attached to the back side of the boom and a sheave 13 at the tip of the boom. As a result, the hook 14 moves up and down by driving the winch drums 9 and 10.

FIG. 2 is a side view (partially sectional view) showing the configuration of the hoisting winch device 20 mounted on the crane shown in FIG. In FIG. 1, a plurality of hoist winch devices 20 are mounted on the boom 3, but their basic configurations are the same as each other. In FIG. 2, for the convenience of explanation, the left-right direction of the hoisting winch device 20 is defined as illustrated.

  The hoisting winch device 20 includes a winch drum 21 (9, 10 in FIG. 1), a hydraulic motor 31 that can rotate forward and reverse, and a deceleration that transmits the driving force of the hydraulic motor 31 to the winch drum 21. The machine 32 and the bearing 33 which supports the winch drum 21 rotatably. The hydraulic motor 31 is supported by the lower boom 3a via a support portion (not shown). The bearing 33 is also supported by the lower boom 3 a via the support portion 34.

  3A is a cross-sectional view of the winch drum 21, FIG. 3B is a left side view, and FIG. 3C is a right side view. As shown in FIGS. 2 and 3, the winch drum 21 includes a substantially cylindrical winding drum 22, and a right flange 23 and a left flange 24 provided at both left and right ends of the winding drum 22. A plurality of bolt holes 23 a are formed in the right flange 23 in the circumferential direction, and bolts 23 b are screwed into the bolt holes 23 a, and a speed reducer 32 is fastened to the surface of the right flange 23.

  On the other hand, the left flange 24 is also provided with a plurality of bolt holes 24a in the circumferential direction. The bolt holes 24a are provided at the same position as the bolt holes 23a, that is, at the same pitch and the same diameter as the bolt holes 23a. A fitting portion 24 c is provided on the inner peripheral surface of the left flange 24. The flange end 33a of the bearing 33 is fitted into the fitting portion 24c, the bolt 24b is screwed into the bolt hole 24a, and the bearing 33 is fastened to the surface of the left flange 24. On the inner peripheral surface of the right flange 23, a fitting portion 23c having the same shape as the fitting portion 24c is provided.

  As a result, as shown in FIG. 4, the speed reducer 32 can be attached to the surface of the left flange 24, and the bearing 33 can be attached to the fitting portion 23 c of the right flange 23. That is, the flange end portion 33a of the bearing 33 is fitted to the fitting portion 23c of the right flange 23, the bolt 24b is screwed into the bolt hole 23a, and the bearing 33 is fastened to the surface of the right flange 23. Further, the bolt 23 b is screwed into the bolt hole 24 a of the left flange 24, and the speed reducer 32 is fastened to the surface of the left flange 24.

  As shown in FIG. 3, one end of the winch rope 25 (9a, 10a in FIG. 1) passes through the right flange 23 and is fixed to the outer surface of the right flange 23 via a rope fixture 26. Is wound in the R1 direction. Further, as shown in FIG. 2, a groove 22a is formed on the circumferential surface of the winding drum 22 along the winding direction of the rope 25 (R1 direction in FIG. 3), and the winding direction of the rope 25 is defined by the groove 22a. ing.

  As shown in FIG. 3, an engagement groove 27 for drum lock is formed on the outer peripheral surface of the right flange 23. A claw 28 of the lock mechanism is engaged with the engagement groove 27, thereby preventing rotation of the winch drum 21 due to oil leakage of the hydraulic motor 31 in the winding down direction.

  As described above, the groove 22a for the rope is formed on the peripheral surface of the winch drum 21, and the engagement groove 27 for the drum lock is provided on the right flange 23. For this reason, the drum 21 cannot be mounted on the boom 3 with the left and right reversed, that is, the right flange 23 on the left side and the left flange 24 on the right side.

  FIG. 5A is a front view (a view V in FIG. 1) showing a mounted state of the hoisting winch device 20. FIG. 5B is a diagram showing a comparative example of the present embodiment. In the present embodiment, the speed reducer 32 and the bearing 33 can be attached to the left and right sides of the winch drum 21, respectively. Therefore, as shown in FIG. Installed in the opposite direction. That is, the hydraulic motor 31 is attached to the right side of the winch drum 9 mounted on the boom base end side via the speed reducer 32, and the bearing 33 is attached to the left side (see FIG. 2). Moreover, the bearing 33 is attached to the right side of the winch drum 10 mounted in the boom front end side, and the hydraulic motor 31 is attached to the left side via the reduction gear 32 (refer FIG. 4). The chain line in the figure indicates the width of the boom 3, and the size of the hydraulic motor 31 and the width of the drums 9 and 10 are set so that the length of the hoisting winch device 20 does not exceed the width of the boom 3. . When the winch ropes 9a and 10a are wound around the drums 9 and 10 in multiple layers, random winding easily occurs. Therefore, in the present embodiment, the widths of the drums 9 and 10 are set as wide as possible.

  In the present embodiment, since the mounting position of the hydraulic motor 31 for the winch drum 9 and the mounting position of the hydraulic motor 31 for the winch drum 10 are opposite to each other, the rotation direction of the hydraulic motor 31 for the winch drum 9 and the winch drum The rotational directions of the 10 hydraulic motors 31 need to be opposite to each other. For example, if the hydraulic motor 31 for the winch drum 9 is rotated forward when the winch drum 9 is driven to wind up, the hydraulic motor 31 for the winch drum 10 may be rotated reversely when the winch drum 10 is driven to wind up. Well this is possible by changing the connection of the hydraulic piping.

  As shown in FIG. 5A, when the hydraulic motor 31 and the bearing 33 are attached to the drums 9 and 10 in opposite directions, the center position of the drum 10 with respect to the drum 9 is offset in the width direction. For this reason, it is possible to reduce the angles θ1, θ2 (fleet angles) of the winch ropes 9a, 10a between the drums 9, 10 and the sheave 13 disposed along the width direction of the boom 3 at the boom tip. The fleet angles θ1 and θ2 can be suppressed within a value (for example, 4 °) determined by the standard.

  In contrast, as shown in FIG. 5B, in the configuration in which the mounting position of the hydraulic motor 31 and the bearing 33 is limited to one of the left and right sides of the drums 9 and 10, the hydraulic motor 31 is located on the left side of each drum 9 and 10. A bearing 33 is attached to the right side of each drum 9, 10. For this reason, the center position of the drum 10 with respect to the drum 9 cannot be offset, and the fleet angles θ1 and θ2 become large, and it is difficult to suppress the value to a value determined by the standard.

According to the present embodiment, the following operational effects can be achieved.
(1) Both the left and right flanges 23, 24 of the winch drum 22 are provided with bolt holes 23a, 24a at the same position, and fitting portions 23c, 24c having the same shape are provided. And the bearing 33 can be attached. As a result, as shown in FIG. 5A, the hydraulic motor 31 and the bearing 33 can be attached to the drums 9 and 10 in opposite directions, and the fleet angle can be easily suppressed to a value determined by the standard. .
(2) A plurality of drums 9 and 10 can be efficiently mounted in a limited space, and the degree of freedom in layout increases.
(3) When there is a model in which the hydraulic motor 31 is provided on the left side of the winch and a model in which the hydraulic motor 31 is provided on the right side, it is not necessary to design a winch that is different for each model, and it is possible to prevent an increase in the types of winches.

  In the above-described embodiment, the application example in which the plurality of drums 9 and 10 are mounted on the lower boom 3a has been described. However, the present invention can be similarly applied to the case where the plurality of drums 9 and 10 are mounted on the revolving structure 2. For example, as shown in FIG. 6, winch drums 9 and 10 are mounted along the width direction of the swing body 2 and in the front-rear direction of the swing body 2, the bearing 33 is mounted on the right side of the drum 9, and the hydraulic motor 31 is mounted on the left side. The hydraulic motor 31 can be provided on the right side of the drum 10 and the bearing 33 can be provided on the left side. Thereby, the freedom degree of arrangement | positioning of the drums 9 and 10 spreads, interference with other components can be avoided easily, and the handling of hydraulic piping etc. can also be improved.

  In the above embodiment, the right flange 23 of the winch drum 22 is provided with the bolt hole 23a and the fitting portion 23c, and the left flange 24 is provided with the bolt hole 24a and the fitting portion 24c having the same configuration. The configuration of the first mounting portion and the second mounting portion is not limited to the above-described configuration as long as the hydraulic motor 31 and the reduction gear 32 as the apparatus for use and the bearing 33 as the bearing device can be mounted. Although the drums 9 and 10 are driven by the hydraulic motor 31 via the speed reducer 32, the configuration of the drum driving device is not limited to this. As long as the drums 9 and 10 are rotatably supported, the bearing device may have any configuration.

  In the above embodiment, an example (FIG. 1) in which a plurality of drums 9 and 10 are mounted on the boom 3 and an example (FIG. 6) in which a plurality of drums 9 and 10 are mounted on the revolving structure 2 are shown. Application examples are not limited to this. The same configuration can be made when three or more winch drums are mounted. That is, as long as the features and functions of the present invention can be realized, the present invention is not limited to the hoisting winch device of the embodiment.

The side view of the crane as one embodiment by the present invention. The figure which shows the structure of the hoisting winch apparatus mounted in the crane shown in figure by FIG. (A) is sectional drawing of the winch drum of FIG. 2, (b) is a left view, (c) is a right view. The figure which shows an example of operation | movement of the winding winch apparatus which concerns on this Embodiment. (A) is an arrow V figure of FIG. 1, (b) is a figure which shows the comparative example of Fig.5 (a). The figure which shows the modification of this Embodiment.

Explanation of symbols

2 Revolving body 3 Boom 9, 10 Winch drum 20 Hoist winch device 22 Winch drum 23 Right flange 23a Bolt hole 23c Fitting portion 24 Left flange 24a Bolt hole 24c Fitting portion 31 Hydraulic motor 32 Reducer 33 Bearing

Claims (3)

A swivel,
A boom pivotally supported by the revolving structure so as to be able to move up and down;
A rotating shaft of a winch drum is mounted on the boom along the width direction of the boom, and at least first and second hoisting winch devices respectively arranged in the longitudinal direction of the boom;
The first and second hoisting winch devices are respectively
A winch drum having a first mounting portion at one end in the axial direction and a second mounting portion at the other end in the axial direction;
A drum driving device mounted on the first mounting portion and driving the winch drum;
A bearing device attached to the second attachment portion and rotatably supporting the winch drum;
The first mounting portion is configured to be able to mount the bearing device, and the second mounting portion is configured to be able to mount the drum driving device,
The first winch device has the drum driving device on one side in the width direction of the boom and the bearing device on the other side in the width direction, and the second winch device has one side in the width direction of the boom. A crane having the bearing device on the side and the drum driving device on the other side in the width direction. A swivel,
A boom pivotally supported by the revolving structure so as to be able to move up and down;
The axis of rotation of the winch drum is mounted along the width direction of the swing body to the swivel body, and a pivot body first and second hoisting winch device even without least each of which is arranged side by side in the longitudinal direction of the With
The first and second hoisting winch devices are respectively
A winch drum having a first mounting portion at one end in the axial direction and a second mounting portion at the other end in the axial direction;
A drum driving device mounted on the first mounting portion and driving the winch drum;
A bearing device attached to the second attachment portion and rotatably supporting the winch drum;
The first mounting portion is configured to be able to mount the bearing device, and the second mounting portion is configured to be able to mount the drum driving device,
The first winch device has the drum driving device on one side in the width direction of the swivel body and the bearing device on the other side in the width direction, and the second winch device has a width of the swivel body. A crane having the bearing device on one side in the direction and the drum driving device on the other side in the width direction. The crane according to claim 1 or 2,
The crane according to claim 1, wherein each of the first attachment portion and the second attachment portion in the first and second winch devices has a fitting portion into which the bearing device is fitted.

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