JPS6145110Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a gear with a shaft for a chain block having a function of lubricating the bearing part, and the invention relates to a gear with a shaft for a chain block that has a function of lubricating the bearing part, and is used for a hoisting or traction device that can lubricate the bearing part by a simple means. The purpose is to provide a gear with a shaft.

Next, this invention will be explained in detail using illustrated examples.

Fig. 1 shows a shafted gear having an oil retaining groove according to an embodiment of the invention, and Figs. 2 and 3 show a large diameter gear fixed to one side of the shafted gear. A shaft 3 having a circular cross section is integrally provided at both ends of a relatively long gear 1 having a small number of teeth, and each interdental groove bottom 2 in the gear 1 is located closer to the axis than the circumferential surface of the shaft 3. An oil retaining groove 4 is provided on the circumferential surface of the shaft 3 and extends over the entire length of the shaft 3 and communicates with the interdental groove bottom 2. A tooth crest on one longitudinal side of the gear 1 is cut to form a low tooth crest surface 5, and a large tooth crest is formed on one longitudinal side of the gear 1, that is, a portion having the low tooth crest surface 5. A tooth-shaped hole 7 provided in the center of the diameter gear 6 is fixed by press-fitting, and the hole edge in the large-diameter gear 6 has a stepped portion 9 between the low tooth crest surface 5 and the high tooth crest surface 8. Furthermore, a gap 10 is provided between the tooth-shaped hole 7 and the interdental groove bottom 4 of the gear 1.

4 to 6 show a chain block in which the shafted gear of the above embodiment is used as a gear reduction part, and a load sheave 11 is provided outside the intermediate part.
A hollow driven shaft 12 having A box-shaped frame 16 for composing a gear box formed by pressing a steel plate is disposed, and the box-shaped frame 16 and the one plate-shaped frame 13 constitute a gear box.

A drive shaft 17 passing through the hollow driven shaft 12
A drive pinion 18 is carved on one end at a position protruding from the hollow driven shaft 12, and
An end shaft 19 having a smaller diameter than the drive pinion 18 is provided, and the end shaft 19 is connected to the box-shaped frame 1.
The end face of the drive pinion 18 is arranged to engage the bearing 20, and the engagement between the drive pinion 18 and the bearing 20 causes the drive shaft 17 to rotate. This prevents it from slipping out to the gearbox side.

A large-diameter driven gear 21 is fixed to one end of the hollow driven shaft 12 in a gearbox, and the one flat frame 13 and the box-shaped frame 1
A plain bearing 22 molded from a moldable self-lubricating material such as an oil-impregnated sintered alloy or a dry lubricant-filled sintered alloy is inserted into the through hole provided in the hole 6 .
is fitted from the inside of the gearbox, the flanges 23 of the plain bearing 22 are engaged with the side surfaces of the frames 13 and 14, and the shafts 3 on both sides of the shafted gear of the above embodiment are fitted into the plain bearing 22. is,
Further, the driving pinion 18 is meshed with the large diameter gear 6, and the large diameter driven gear 21 is meshed with the gear 1 having a small number of teeth.

A male thread 24 is provided at the end of the drive shaft 17 protruding from the other end of the hollow driven shaft 12, and a brake receiver 25 and a hand chain wheel 26 are screwed onto the male thread 24. In between is a ratchet wheel 27 and friction plates 2 arranged on both sides of the ratchet wheel 27.
8 is interposed, and the pawl piece 29 attached to the frame 14 is engaged with the pawl wheel 27 by the elasticity of the spring, and a bearing 30 is fitted to the hand chain side end in the hollow shaft 12, and the pawl piece 29 is engaged with the pawl wheel 27 by the snap spring 31. fixed,
Furthermore, the hand chain wheel side end surface of the large diameter portion 32 provided at the intermediate portion of the drive shaft 17 is arranged to engage with the end of the bearing 30, and the engagement between the large diameter portion 32 and the bearing 30 This prevents the drive shaft 17 from coming off toward the chain wheel side.

A stopper 3 for restricting the movement of the hand chain wheel 26 in the relaxation direction is provided at the end of the drive shaft 17 on the hand chain wheel side.
3 is attached by a pin, and an upper hook support fitting 35 to which an upper hook 34 is attached is arranged at the upper part between each of the flat frames 13 and 14.
The locking protrusions at both left and right ends of the chain stripper 37, which is pivotally connected to the load sheave 11 and arranged at the lower part of the load sheave 11, are fitted into the locking holes of the respective frames 13, 14, and 14, 16 and the hand chain wheel cover 38 are connected by bolts 39.

The operation of the manual chain block shown in FIGS. 4 to 6 is the same as that of the conventional chain block, so a description thereof will be omitted.

In the embodiments shown in Figures 1 to 3, the shaft 3 is provided with the same number of oil retaining grooves 4 as the number of interdental grooves of the gear 1, but the number of oil retaining grooves 4 is It may be less than the number of grooves. The invention can also be applied to shaft gears of gear reduction parts in hoisting or traction devices other than chain blocks, such as lever-swiveling hoisting or traction devices.

According to this invention, the interdental groove bottom 2 of the gear 1 provided in the gear reduction part of the hoisting or traction device is located closer to the shaft center than the circumferential surface of the shaft 3 connected to the gear 1. An oil retaining groove 4 is provided on the circumferential surface of the shaft 3 and communicates with the interdental groove bottom 2.
Since lubricating oil is provided in the oil retaining groove 4, it is possible to lubricate between the shaft 3 and the flat bearing 22 fitted therewith. The wear of the plain bearing 22 can be significantly reduced and its durability can be extended, and furthermore, the pumping action caused by the meshing of the gear provided on the shaft 3 with other gears will cause the friction to adhere to those gears. Since a part of the lubricating oil contained in the shaft 3 is sent to the oil retaining groove 4, the lubricating oil can be retained in the oil retaining groove for a long period of time.
Also, the durability of the plain bearing 22 can be further improved.

[Brief explanation of drawings]

Figures 1 to 3 show one embodiment of this invention, in which Figure 1 is a perspective view of a shafted gear having an oil retaining groove, and Figure 2 is a perspective view of a shafted gear having an oil retaining groove on one side of the shafted gear. A longitudinal side view showing a state in which the large-diameter gear is fixed.
FIG. 3 is a sectional view taken along line A-A. 4 to 6 show a chain block in which the gear with shaft of the above embodiment is used as a gear reduction part, FIG. 4 is a longitudinal side view, and FIG. 5 is an enlarged longitudinal side view of a part thereof. FIG. 6 is an enlarged longitudinal sectional side view showing a manual drive section and a gear reduction section. In the figure, 1 is a gear, 2 is the bottom of the interdental groove, 3 is a shaft, 4 is an oil retaining groove, 5 is a low tooth crest, 6 is a large diameter gear, 7 is a tooth hole, 9 is a step, and 10 is a gap, 11 is a load sheave, 12 is a hollow driven shaft, 13 and 1
4 is a flat steel frame, 17 is a drive shaft, 18 is a drive pinion, 21 is a large-diameter driven gear, 22 is a plain bearing, and 26 is a hand chain wheel.

Claims (1)

[Scope of utility model registration request] The interdental groove bottom 2 of the gear 1 provided in the gear reduction part of the hoisting or traction device is arranged so as to be located closer to the shaft center than the circumferential surface of the shaft 3 connected to the gear 1, and A gear with a shaft for a hoisting or traction device, characterized in that an oil retaining groove 4 communicating with the interdental groove bottom 2 is provided on the circumferential surface of the shaft 3.