JP4121819B2 - Hoisting and towing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hoisting and traction device, and more particularly to a hoisting and traction device that can connect a load gear and a load sheave in a separable manner so that the entire device can be reduced in size and weight and can be easily processed.
[0002]
[Prior art]
Conventional hoisting and traction devices have a structure in which a load gear is mounted on the shaft of a load sheave to transmit power, so that the outer diameter of the load gear becomes large, which causes an increase in the size of the device. For the purpose of reducing the size and weight of conventional hoisting and towing machines, the load gear of the hoisting and towing device is the same diameter as or smaller than the outer diameter of the load sheave bearing, and the reduction gear is directly connected to the load gear. A hoisting and pulling device that is configured to mesh with each other and in which a load sheave and a load gear are integrally formed is known. (For example, see Patent Document 1)
[0003]
[Patent Document 1]
JP 2001-270688 A (paragraph number [0003 to 0004], FIG. 5, paragraph number [0013], FIG. 1)
[0004]
[Problems to be solved by the invention]
As shown in FIG. 6, the hoisting and traction device described in the above-mentioned Patent Document 1 includes a pinion gear 4, speed reduction gears 5a and 5b interlocked with the pinion gear 4, and a load gear 3 and load sheave interlocked with the speed reduction gear 5b. 2 is integrally formed, the load gear 3 has the same diameter or a small diameter as the outer diameter of the load sheave bearing 7, and the reduction gear 5 b is directly meshed with the load gear 3.
[0005]
This known technique has features compared to the prior art in that the hoisting / traction device can be reduced in size and weight, but the diameter of the load gear is determined by the bearing diameter of the load sheave, so the bearing diameter of the load sheave As long as the diameter is not small, there is a problem that further downsizing cannot be performed. In addition, since the reduction gear bearing is connected to the frame, it is difficult to machine the bearing holes in the frame , and the heat treatment of the load gear and load sheave can only be performed under the same conditions. In some cases, since the load gear and the load sheave are exchanged as a unit, there is a problem that the unit price of the replacement parts becomes high.
[0006]
On the other hand, hoisting and pulling devices are desired to be further reduced in size and weight in order to pursue convenience in use, ease of transport, and cost reduction. small is characteristic of been hoisting-pulling device according to 1, with the object can be achieved that lighter, in order to solve the above problems of prior patent Document 1, and is easy drilling of the frame, one or Rodogiya An object of the present invention is to provide a hoisting and pulling device capable of separately heat-treating a load sheave.
[0007]
[Means for Solving the Problems]
The present invention solves the above-mentioned problem, in a hoisting and traction device including a pinion gear, a reduction gear interlocking with the pinion gear, and a load sheave driven via a load gear interlocking with the reduction gear; The load sheave shaft end is separable and connected to transmit torque, and the reduction gear is directly meshed with the load gear, and the reduction gear is provided near the load sheave bearing provided in the center of the frame. A hoisting and traction device characterized by being pivotally supported.
[0008]
According to the present invention, the load sheave shaft diameter can be made smaller than the load gear outer diameter by connecting the load gear 1 side end portion and the load sheave shaft end portion so as to be separable and capable of transmitting torque. , can be the spacing structure without connecting the bearing hole of the reduction gear and the load sheave which is provided on the frame, it is possible to facilitate processing of the bearing hole of the frame, or, Rodogiya and the load sheave is separate structures Therefore, the heat treatment can be performed individually, the load gear and the load sheave can be processed to an appropriate hardness, and the component unit price in the case of component replacement can be reduced.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention is a hoisting and traction device including a pinion gear, a reduction gear interlocked with the pinion gear, and a load sheave driven via a load gear interlocked with the reduction gear. is supported by two on-axis, has a convex portion for load sheave and fitted at one end, one end in the load sheave, the axial movement regulation at flanges provided at the other end to pin two Ongiya The load sheave has a concave portion that fits with a convex portion provided at one end portion of the load gear, and the load gear end portion and the load sheave shaft end portion are separable and coupled so as to be able to transmit torque. Is directly meshed with the load gear, and the reduction gear is supported by a reduction gear bearing provided close to the load sheave bearing provided in the center of the frame. By connecting the end of the groove so that it can be separated and transmitted torque, the load sheave shaft diameter can be made smaller than the outer diameter of the load gear, and the reduction gear and load sheave provided on the frame The bearing holes in the frame can be separated so that machining of the bearing holes in the frame can be facilitated, and the load gear and load sheave are separate structures, so heat treatment must be performed separately. Thus, the load gear and the load sheave can be processed to an appropriate hardness, and further, the parts unit price in the case of parts replacement can be reduced.
[0010]
The invention according to claim 2 is characterized in that the end portion of the load gear and the end portion of the load sheave shaft are connected by concavo-convex fitting, and has the same action as that of the invention according to claim 1. Embodiments of the present invention will be described below with reference to the drawings.
[0011]
Embodiment
A structure for supporting a reduction gear and a structure for a load gear in a hoisting and traction device of the present invention will be described with reference to FIGS.
[0012]
In the figure, 1 is a frame having a load sheave and a reduction gear shaft bearing, 2 is a load sheave disposed between the frame 1 and the frame facing the frame 1, and the shaft portions formed on both sides of the frame are framed. One end of the shaft is pivotably supported, and has a recess 2a that can be separated from one end of the load gear 3 by, for example, concave-convex fitting and can transmit torque. By doing so, the load sheave shaft diameter can be made smaller than the load gear outer diameter. Reference numeral 3 denotes a load gear, and one end portion of the load gear is connected to the load sheave 2 by a convex portion 3a that fits into the concave portion 2a of one shaft end portion of the load sheave 2. Reference numeral 4 denotes a pinion gear, 5a denotes a reduction gear that meshes with the pinion gear 4, 5b denotes a reduction gear 5b that is coaxially mounted with the reduction gear 5a, and the reduction gear 5a and the reduction gear 5b form a pair of reduction gears 5; Each meshes with a pinion gear and a load gear. By providing a plurality of reduction gears facing each other, it is possible to disperse the transmission torque, negate the reaction force in the radial direction between the meshing gears, and reduce the size of each gear and the size of the bearing. The load gear 3 is supported only at one end of the load sheave 2 by canceling the reaction force in the radial direction described above. For example, when the number of teeth of the load gear 3 is an odd number, the radial direction Since the reaction force cancellation is incomplete, a structure in which the pinion shaft 15 is inserted through the load gear 3 may be supported. Further, the load gear 3 is configured such that its axial movement is restricted by a flange 4 a provided at one end of the load sheave 2 and at the other end of the pinion gear 4. 7 is a load sheave shaft bearing provided in the center of the frame 1, 8 is a shaft bearing for the reduction gear 5 provided close to the load sheave shaft bearing and spaced from the outside thereof, 9 is an upper hook mounting hole, 10 is a stat bolt mounting hole, 11 is a stat bolt, 12 is an upper hook, 13 is a chain provided with a lower hook at one end, 14 is a brake plate, a brake brake, a mechanical brake comprising a pawl wheel and pawls, and 15 is a load sheave center. A pinion shaft that is inserted into the insertion hole and is pivotally supported, 16 is an operation lever, and 17 is a casing.
[0013]
The operation of this apparatus will be described. When the operation lever 16 is rotated, it is transmitted to the pinion shaft 15 via the mechanical brake 14, and one side of the load gear 3 is connected to the pinion gear 4 formed at one end of the pinion shaft 15 through the pair of reduction gears 5 and the load gear 3. The load sheave 2 fitted to the end is rotated, the chain hung around the load sheave 2 is wound, and the load is lifted or pulled by a lower hook provided at one end of the chain. Since the load sheave 2 is provided with a concave portion 2a in which the convex portion 3a of the load gear 3 is fitted and connected to each other, the load sheave 2 is connected to the load sheave shaft. The diameter can be reduced. Further, it has the following characteristics as compared with those described in the prior art document 1 in which the load sheave 2 and the load gear 3 are integrated. That is, in this embodiment, as shown in FIGS. 1 and 5, one end of the load gear 3 and one shaft end of the load sheave 2 are separable by concavo-convex fitting and are connected to transmit torque. For this reason, the shaft diameter of the shaft portion of the load sheave 2 can be made smaller than the outer diameter of the load gear 3, and the bearing hole of the reduction gear 5b provided in the frame 1 is replaced with the shaft bearing hole of the load sheave 3. it is possible to connecting non spaced arrangement, it is possible to facilitate processing of the bearing hole of the frame 1, was or, for Rodogiya 3 and the load sheave 2 is separate from the structure, heat treatment is performed separately The load gear 3 is hard, the load sheave 2 can be processed to an appropriate hardness in consideration of chain wear, and the unit cost in the case of component replacement can be reduced. Further, since the distance between the bearings can be shortened and each gear can be reduced in size, the hoisting and pulling device main body can be reduced in size and weight, and a lower cost hoisting and pulling device can be provided.
[0014]
【The invention's effect】
In the present invention, the shaft end portions of the load gear and the load sheave are separable and coupled so as to be able to transmit torque, so the load sheave shaft diameter can be made smaller than the load gear outer diameter. bearing hole of the reduction gear and the load sheave can be spaced arrangement not connected to being, a process of the bearing hole of the frame can be facilitated, or, for Rodogiya and load sheave is separate structures, separately Heat treatment can be performed, the load gear and the load sheave can be processed to an appropriate hardness, and the unit cost in the case of component replacement can be reduced.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a hoisting and traction device of the present invention.
2 is a plan view of the frame in FIG. 1. FIG.
FIG. 3 is a partially enlarged view of a load sheave and a load gear.
4A and 4B are sectional views of a side surface and a front surface of a load gear.
FIGS. 5A and 5B are a side view and a front view of a load sheave.
FIG. 6 is a longitudinal sectional view of a conventional hoisting and traction device.
[Explanation of symbols]
1 Frame 2 Load sheave 2a Concavity 3 Load gear 3a Convex 4 Pinion gear 4a Flange 5a Reduction gear a
5b Reduction gear b
7 Load sheave bearing 8 Reduction gear bearing 9 Upper hook mounting hole 10 Stat bolt mounting hole 11 Stat bolt 12 Upper hook 13 Lower hook 14 Mechanical brake 15 Pinion shaft 16 Operation lever 17 Casing

Claims (2)

A pinion gear, a reduction gear in conjunction with the pinion gear, the winding comprising a load sheave driven via a Rodogiya in conjunction with the reduction gear, the traction device, Rodogiya is pivotally supported by pinion on shaft, one end parts to have a convex portion which load sheave mating, one end in the load sheave, the axial movement is restricted by a flange which is provided at the other end to pin two Ongiya, load sheave is one end of the Rodogiya The load gear end and the load sheave shaft end are separable and connectable so that torque can be transmitted, the reduction gear is directly meshed with the load gear, and the reduction gear is attached to the frame. A hoisting and traction device characterized by being supported by a reduction gear bearing provided close to a load sheave bearing provided at the center.   2. The hoisting and pulling device according to claim 1, wherein the load gear end portion and the load sheave shaft end portion are connected by uneven fitting.

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