JP4101036B2 - 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 reduce the size and weight of the main body of the device and eliminate the number of parts, processing, and assembly man-hours.
[0002]
[Prior art]
In the conventional hoisting and traction device, the distance between the reduction gear, the pinion gear, and the load gear is large, so that each gear has a large diameter, which is an obstacle to downsizing the hoisting and traction device. Further, the pinion shaft having the load gear and the pinion gear needs to be assembled after the load sheave is incorporated in the bearing of the frame, and the load gear cannot be integrated with the load sheave in advance. Therefore, by reducing the distance between the shafts of the reduction gear, setting the outer diameter of the load gear to the same or smaller diameter as the bearing portion of the load sheave, and providing the load gear integrally with the load sheave in advance, the overall device is reduced in size and weight. Winding and traction devices that can reduce the number of parts and the number of processing and assembly processes have been proposed. (For example, see Patent Document 1)
Hereinafter, the hoisting and pulling device described in Patent Document 1 will be described with reference to FIGS. 5 and 6.
[0003]
In the drawing, 1 is a frame having a load sheave bearing 7, 2 is a load sheave rotatably supported between the frames 1, and 3 is the same diameter as or smaller than the outer diameter of the bearing portion of the load sheave 2. 2, a pinion gear, 4a is a reduction gear meshing with the pinion gear 4, 5b is a reduction gear coaxially mounted with the reduction gear 5a, and a pair of the reduction gear 5a and the reduction gear 5b. The reduction gear 5 is formed and meshes with the pinion gear and the load gear, respectively. 7 is a load sheave bearing provided in the center of the frame 1, 8 is a reduction gear 5 bearing connected to the outside of the load sheave bearing 7, 9 is a mounting hole for an upper hook 12 provided in the frame 1, and 10 is a stat Bolt 11 mounting holes, 11 is a stat bolt, 12 is an upper hook, 13 is a lower hook, 14 is a brake plate, a brake receiver, a mechanical brake consisting of a pawl wheel and pawls, 15 is inserted through an insertion hole at the center of the load sheave, It is a pinion shaft that is pivotally supported, and has a pinion gear 4 on one side and a mechanical brake 15 on the other side. 16 is an operation lever, and 17 is a casing.
[0004]
Next, the operation will be described. When the operating lever 16 is rotated, it is transmitted to the pinion shaft 15 through the mechanical brake 14, and the load sheave 2 is rotated through the pinion gear 4 formed at one end of the pinion shaft 15, the pair of the reduction gear 5 and the load gear 3. Then, the chain is wound around the load sheave 2 and the load is lifted and lowered by the lower hook 13 provided at one end of the chain. By making the load gear 3 the same diameter as or smaller than the outer diameter of the bearing portion of the load sheave 2, the load gear 3 can be integrated with the load sheave 2 in advance, and further connected to the load sheave bearing 7 of the frame 1. Since the reduction gear 5 is pivotally supported by the bearing 8 of the reduction gear 5 provided, there is no need to provide an interval for securing the wall thickness between the bearings of the frame 1 as in the prior art, and the distance between the bearings can be shortened. Moreover, each gear can also be reduced in size, so that the hoisting and pulling device body can be reduced in size and weight. In addition, the load gear 3 can be assembled to the load sheave 2 in advance or can be integrally molded. Further, the pinion shaft having the pinion gear 4 is also assembled to the load sheave 2 in advance. A plurality of parts can be incorporated as one unit, the number of parts, the number of processing / assembly processes can be reduced, and the cost can be further reduced.
[0005]
[Problems to be solved by the invention]
However, in the above-described conventional apparatus, the reduction gear shaft is provided so as to be connected to the load sheave bearing, so that there is a problem that elaborate machining is required and the machining cost is increased. Furthermore, in order to improve the wear resistance of the bearing part, the frame needs to be heat treated to increase its hardness, but the frame often comes into sliding contact with the load side chain during the lifting and lowering operation of the load by the chain. In order to prevent damage to the chain during sliding contact between the frame and the chain, the hardness of the frame is set to be relatively lower than the hardness of the chain. Further, in this case, heat-treating only the frame bearings complicates the heat-treatment process, increases the processing cost, and increases the cost of the entire apparatus.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-270688
[Means for Solving the Problems]
The present invention solves the above-mentioned problem, and is linked with a pinion gear, a reduction gear, a reduction gear, is driven through a load gear integrally formed with the load sheave, and is provided with a load sheave attached to the main frame, In the traction device, the fitting portion of the load sheave is fitted in the fitting hole of the main frame, and the load sheave bearing groove having a smaller diameter than the outer diameter of the load gear is provided continuously to the fitting portion, and the bearing groove Is supported by an auxiliary frame that supports a reduction gear.
[0008]
According to the present invention, the diameter of the load sheave shaft portion can be reduced by the recess of the bearing groove, so that the distance between the load sheave bearing portion of the auxiliary frame and the reduction gear bearing can be separated by the recess. As well as the conventional device, it can be reduced in size and weight, and by bearings with independent bearing holes, it is easier to process the bearing part of the frame than in the conventional device, and the load sheave and deceleration by the auxiliary frame Since the device is pivotally supported, the heat resistance of the frame bearing can be improved by heat-treating only the auxiliary frame, and the main frame is not heat-treated. Chain damage can be prevented.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, a pinion gear, a reduction gear interlocked with the pinion gear, a load gear interlocked with the reduction gear and driven through a load gear integrally formed with the load sheave and mounted on the main frame. A load sheave bearing groove having a smaller diameter than the outer diameter of the load gear, in a hoisting and traction device provided with a sheave, with a fitting portion of the load sheave fitted in the fitting hole of the main frame. And the bearing groove is pivotally supported by an auxiliary frame that pivotally supports the reduction gear. According to the present invention, the diameter of the load sheave bearing portion is reduced by the recess of the groove of the bearing groove. Therefore, the distance between the load sheave bearing part of the auxiliary frame and the reduction gear bearing can be separated by a recess, and the distance between the shafts can be shortened to reduce the size and weight in the same way as the conventional device. Bearings with independent bearing holes make it easier to process the bearings of the frame compared to conventional devices, and the load sheave and speed reducer are pivotally supported by the auxiliary frame. Winding traction can improve the wear resistance of the bearings of the frame by heat-treating alone, and can prevent damage to the load chain during lifting operation because the main frame is not heat-treated An apparatus can be provided.
[0011]
The invention according to claim 3 is characterized in that the auxiliary frame can be divided, and the auxiliary frame can be divided, so that the auxiliary frame can be easily processed and attached to the load sheave. it can.
[0012]
Embodiments of the present invention will be described below with reference to the drawings.
[0013]
In the following description, the hoisting and traction device brake device portions are the same as in the conventional example, and the description thereof is omitted.
[Embodiment 1]
An embodiment of a bearing structure of a load sheave in a hoisting and traction device of the present invention will be described with reference to FIGS.
[0014]
In the figure, 1 is a main frame provided with a fitting hole 1a into which a load sheave 2 is fitted, and 2 is a load sheave rotatably mounted between the main frames 1. The fitting hole 1a of the main frame 1 is shown in FIG. A fitting portion 2a that is fitted to the fitting portion 2a, and a bearing groove 2b that is connected to the fitting portion 2a and has a diameter smaller than the outer diameter of the load gear. 3 is a load gear integrally formed with the load sheave, 4 is a pinion gear, 5a is a reduction gear that meshes with the pinion gear 4, 5b is a reduction gear that is coaxially mounted with the reduction gear 5a, and the reduction gear 5a and the reduction gear 5b are A pair of reduction gears 5 are formed and meshed with the pinion gear 4 and the load gear 3, respectively. By providing a plurality of the reduction gears 5, the transmission torque is dispersed, the reaction force in the radial direction between the gears meshing with each other is canceled, and each gear is reduced in size and the bearing is reduced in size. 6 is an auxiliary frame provided with a bearing 8 that supports the reduction gear 5b and a load sheave bearing 6a that supports the load sheave 2 in the bearing groove 2b of the load sheave 2, and 6a is provided at the center of the auxiliary frame 6. A load sheave bearing 7 is a fixing pin for fixing the auxiliary frame 6 to the main frame, and is fitted in fixing pin holes provided in the main frame 1 and the auxiliary frame 6. Reference numeral 8 denotes a reduction gear 5 bearing provided outside the load sheave bearing 6 a of the auxiliary frame 6. The load sheave bearing groove 2b is smaller in diameter than the outer diameter of the load gear 3. In order to mount the auxiliary frame 6 in the bearing groove 2b, the auxiliary frame is divided vertically by a dividing line 6c provided in the center. After the divided auxiliary frame 6 is mounted in the bearing groove 2b, the two are integrated together and fixed to the main frame 1 by the fixing pin 7, whereby the auxiliary frame 6 is fixed.
[0015]
In this embodiment, as shown in FIGS. 1 and 2, the load gear 3 is integrally formed with the load sheave 2, and the load sheave 2 is fitted into a load sheave fitting hole 1 a provided in the main frame. A load sheave bearing groove 2b having a diameter smaller than the outer diameter of the load gear 3 is provided in connection with the portion 2a, and the bearing groove 2b is pivotally supported by a load sheave bearing 6a provided in the auxiliary frame 6. The load sheave 2 is provided with a bearing groove 2b provided continuously with the fitting portion 2a, only by fitting the fitting portion 2a of the load sheave 2 into the load sheave fitting hole 1a. The auxiliary frame 6 is pivotally supported by a bearing 6a so that it is pivotally attached to the frame. According to the embodiment described above, since the bearing groove 2b provided in the load sheave 2 is supported by the bearing 6a of the auxiliary frame 6, the load sheave bearing portion diameter is reduced by the amount of the recess due to the groove of the bearing groove 2b. Since the distance between the load sheave bearing portion of the auxiliary frame 6 and the reduction gear bearing 8 is separated by a recess, the distance between the shafts of the load sheave 2 and the reduction gear 5b is shortened as in the conventional device, It is possible to reduce the size and weight, and the processing of the bearing portion of the frame is easier than in the conventional device, and the load sheave 2 and the reduction gear 5b are pivotally supported by the auxiliary frame 6, so that only the auxiliary frame 6 is used. Since the main frame is heat-treated alone and the main frame is not heat-treated, damage to the load chain during the lifting operation can be prevented, and the wear resistance of the frame bearing can be improved.
[0016]
Embodiment 2
Embodiment 2 of the load sheave bearing structure in the hoisting and traction device of the present invention will be described with reference to FIGS.
[0017]
In the figure, 1 is a main frame provided with a bearing 1b on which a load sheave 2 is pivotally supported, and 2 is a load sheave pivotally supported between the main frames 1, which is pivotally supported on the bearing 1b of the main frame 1. And a fitting groove 2d provided continuously to the bearing portion. Reference numeral 3 denotes a load gear that is the same diameter as or smaller than the outer diameter of the bearing portion of the load sheave 2 and is integrally formed with the load sheave 2. The pinion gear 4, the reduction gear 5 a that meshes with the pinion gear 4, and the reduction gear 5 b that is mounted coaxially with the reduction gear 5 a have the same configuration as in the first embodiment. 6 is an auxiliary frame provided with a bearing 8 that supports the reduction gear 5b and a fitting hole 6b that fits into a fitting groove 2d that is connected to the bearing 1b of the load sheave 2, and 8 is a fitting of the auxiliary frame 6. It is a reduction gear bearing provided outside the hole 6b.
[0018]
In the present embodiment, the load gear 3 is formed integrally with the load sheave 2, the outer diameter of the load gear 3 is the same as or smaller than the outer diameter of the load sheave 2, and the bearing 2 c of the load sheave 2 is provided in the main frame 1. The load sheave bearing 1b is pivotally supported, and the fitting groove 2d connected to the load sheave bearing portion 2c is fitted into the fitting hole 6b of the auxiliary frame 6 that pivotally supports the reduction gear 5b. The main frame 1 is configured to be fixed.
[0019]
According to the above-described embodiment, the auxiliary frame 6 that pivotally supports the reduction gear 5b is fitted into the fitting groove 2d provided in the load sheave 2, so that the auxiliary frame 6 is provided by the recess of the fitting groove 2d. Since the distance between the fitting hole 6b and the reduction gear bearing 8 can be separated, the conventional apparatus can be reduced in size and weight as in the conventional apparatus, and the reduction gear 5b is supported by an independent bearing hole. In comparison with this, sufficient strength can be secured for the bearing 8 of the reduction gear 5b, and the processing of the bearing portion of the frame is easy.
[0020]
【The invention's effect】
According to the present invention, the auxiliary frame that supports the reduction gear is fitted into the bearing groove or the fitting groove provided in the load sheave, so that the distance between the reduction gear and the load sheave fitting portion is the recess of the groove. Since the distance between the load sheave and the reduction gear can be reduced, the reduction gear can be supported by the auxiliary frame bearing at a certain distance from the load sheave. Is easy. Further, by heat-treating the auxiliary frame, it is possible to provide a hoisting and traction device in which the main frame has a low hardness and the bearing portion has a high hardness.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a speed reduction device portion of a hoisting and traction device of the present invention.
FIG. 2 is a front view of the frame of FIG.
FIG. 3 is a longitudinal sectional view of a reduction gear portion of another form of the hoisting and traction device of the present invention.
4 is a front view of the frame of FIG. 3. FIG.
FIG. 5 is a longitudinal sectional view of a conventional hoisting and traction device.
FIG. 6 is a front view of a conventional frame.
[Explanation of symbols]
1 Main frame 1a Load sheave fitting hole 1b Load sheave bearing 2 Load sheave 2a Fitting portion 2b Bearing groove 2c Bearing portion 2d Fitting groove 3 Load gear 4 Pinion gear 5a, 5b Reduction gear 6 Auxiliary frame 6a Load sheave bearing 6b Fitting hole 6c Dividing line 7 Fixed pin 8 Reduction gear bearing

Claims (2)

  In a hoisting and traction device with a load sheave that is driven by a load gear that is integrally molded with a load sheave and that is linked to a reduction gear and that is linked to the reduction gear, A load sheave fitting portion is fitted in the fitting hole of the frame, and a load sheave bearing groove having a diameter smaller than the outer diameter of the load gear is provided in connection with the fitting portion, and the reduction gear is supported by the reduction gear. A hoisting and traction device characterized by being pivotally supported by an auxiliary frame. 2. The hoisting and traction device according to claim 1, wherein the auxiliary frame is separable.

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