JPS6240585B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic lubrication mechanism in a swinging device, and more specifically, to an automatic lubrication mechanism in a swinging device used in cargo handling and earth-moving machines such as cranes, power shovels, clam shells, and motor graders. It is.

FIG. 1 is a partial longitudinal cross-sectional view showing a drive section of a swing device in a deck crane, and FIG. 2 is a cross-sectional view of the swing device.

With the Detsuki crane, as shown in Figure 1,
A large gear 2 with internal teeth is fixedly installed on a crane post 1 that is a fixed base, and a motor 5 is also fixedly installed on a swivel base 4 on which a crane body 3 that is a revolving body is mounted. A small gear 7 is installed, the small gear 7 is meshed with the large gear 2, the small gear 7 is rotated by driving the motor 5, and the swivel base 4 is thereby turned. As shown in FIG. 2, on this swivel base 4, in addition to a small gear 7 for rotating the swivel base, an idler small gear 8 meshed with the large gear 2 is installed by a shaft 9. , and the small gears 7 and 8 ensure the center of rotation of the swivel base 4. In FIG. 1, reference numeral 10 indicates a steel ball, and this steel ball 10 is interposed between the large gear 2 and the swivel base 4 to smooth the turning motion of the swivel base 4.

By the way, in the above-mentioned deck crane and other turning devices for cargo handling and earthmoving machines, the meshing portions of the large gear 2 and small gears 7 and 8 are surrounded by a fixed base, the inside of the revolving body, or other devices, etc. It is located in a quiet place. Then, large gear 2 and small gears 7 and 8
Currently, the work of applying grease to the meshing part with the rotor is performed by a person who enters the fixed base or the inside of the revolving body and applies the grease with a brush or the like.

Therefore, the grease application work is not only extremely complicated but also dangerous.

This invention was made to solve the above-mentioned problems, and includes: a cylindrical housing filled with oil installed on either a fixed base or a swivel base; A fixed shaft along the axis of the housing whose tip protrudes from the lower part of the housing, and a spiral blade rotatably fitted on the outer peripheral surface of the fixed shaft and located inside the housing. a cylindrical rotating shaft; and a small gear disposed via a one-way clutch at a tip of the rotating shaft protruding from a lower part of the housing and meshing with a large gear formed on the other of the fixed base or the rotating base. , a passage for passing the oil, passing through the fixed shaft and opening to a circumferential surface of the rotating shaft located in the housing and a tooth surface of the small gear meshing with the large gear. It has particular characteristics.

One embodiment of this invention will be described with reference to the drawings.

FIG. 3 is a longitudinal cross-sectional view showing a main part of the automatic oil supply mechanism in the turning device of the present invention, and FIG. 4 is a cross-sectional view showing a small gear of the automatic oil supply mechanism.

The automatic oil supply mechanism of the present invention is arranged to mesh with the large gear 2 instead of the free rotating small gear 8 shown in FIG. 2 or between the free rotating gear 8 and the small gear 7, Oil is supplied by using the rotational force of the small gear 8 that rotates as it turns.

In this automatic oil supply mechanism, a cylindrical housing 11 is fixedly installed on the upper surface of the swivel base 4. The upper opening of this cylindrical housing 11 is covered with a lid 12. The upper end of a shaft 13 is fixed to the center of the lid 12 by a nut 14, and the lower end of the shaft projects below the swivel base 4. A cylindrical shaft 15 is rotatably fitted on this shaft 13, and the cylindrical shaft is supported by the swivel base 4 by interposing a thrust bearing 16 between the intermediate outer peripheral surface of the shaft 13 and the swivel base 4. has been done. This cylindrical shaft 1
A spiral wing 17 is fixedly installed on the outer circumferential surface of the cylindrical housing 11 of No. 5, and the outer circumference of the spiral wing is in light contact with the inner circumferential surface of the cylindrical housing 11. Furthermore, a small gear 1 is provided on the lower end circumferential surface of the cylindrical shaft 15.
8 is supported via a one-way clutch 19, and the small gear meshes with the large gear 2. The one-way clutch 19, as shown in FIG.
A recess 20 is formed on the outer peripheral surface of the cylindrical shaft 15, one end of the pawl 21 is pivotally supported in this recess, and the other end is supported so as to be able to protrude and retract from the recess 20. is one in which a notch 22 is formed,
In FIG. 4, when the pinion 18 is rotated counterclockwise, the notch 22 engages with the pawl 21, causing the cylindrical shaft 15 to rotate together, and when the pinion 18 is rotated clockwise, , the claw 21 escapes from the notch 22,
The power of the small gear 18 is not transmitted to the cylindrical shaft 15.
Further, in this automatic oil supply mechanism, a passage 23 is formed, which has one opening 23 a on the lower side of the outer peripheral surface of the cylindrical shaft 15 located inside the cylindrical housing 11 and has the other opening 23 b on the tooth surface of the small gear 18 . ing.
This passage 23 is a hole penetrating the wall of the cylindrical shaft 15,
It is constituted by a hole passing through the axis of the shaft 13 and having openings on the circumferential surface, a hole penetrating the small gear 18, and the like. This passage 23 is formed by directing the hole 23c at the bottom of the fixed shaft 13 toward the tooth surface of the large gear 2.
By fixedly installing the small gear 18, it is always formed between the tooth surface 18a of the small gear 18 that meshes with the tooth surface of the large gear 2. In FIG. 3, reference numeral 24 is a disk fixed to the end surface of the shaft 13, and this disk 24 holds the small gear 18 on the shaft 13.

The automatic oil supply mechanism in the swing device of this invention is as follows:
It works as follows.

When the swivel base 4 is rotated, the small gear 18 is rotated accordingly. If the pinion 18 is rotated counterclockwise in FIG. 4, the pinion 18 becomes integral with the cylindrical shaft 15 via the one-way clutch 19, causing the cylindrical shaft to rotate. When the cylindrical shaft 15 rotates, the spiral blade 17 also rotates together with the cylindrical shaft, and the grease filled in the cylindrical housing 11 is pumped downward. The grease pressure-fed in this way is transferred to the opening 23a of the passage 23.
and is discharged from the opening 23b of the tooth surface 18a of the small gear 18 that meshes with the tooth surface of the large gear 2,
It adheres to the tooth surface of the large gear 2.

When the swivel base 4 is rotated in the opposite direction to the above,
That is, when the pinion 18 is rotated clockwise in FIG. 4, the rotational force of the pinion 18 is cut off by the one-way clutch 19 and is not transmitted to the cylindrical shaft. Therefore, at this time, the cylindrical shaft 15 is not rotated and the spiral blades 17 are not reversed, so that there is no problem such as the grease inside the cylindrical housing 11 being pushed upward.

In this manner, in the automatic lubrication mechanism described above, grease is continuously applied to the tooth surface of the large gear 2 as the swivel base 4 rotates.

In the above embodiment, the large gear 2 is installed on the fixed base side and the small gear 18 is installed on the swivel base 4 side, but these gears may be installed on opposite sides, or Needless to say, the large gear 2 may be an external gear. Further, in the above embodiment, a part of the grease passage 23 is formed in the shaft 13, but this is so that the direction of grease discharge is always directed toward the tooth surface of the large gear 2.

As explained above, according to the present invention, oil (grease) can be automatically supplied to the gears, thereby eliminating the need for complicated manual oiling work and the dangers associated with it. Since it is not necessary, it can be realized at an extremely low cost.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical cross-sectional view showing the driving part of a swing device in a deck crane, FIG. 2 is a cross-sectional view of the swing device, and FIG. 3 is an embodiment of an automatic oil supply mechanism in a swing device according to the present invention. FIG. 4 is a cross-sectional view of the small gear. 1... Crane post (fixed base), 2... Large gear,
3... Crane body, 4... Swivel base (swivel body), 5...
Motor, 6...axis, 7...driving gear, 8...idling gear,
9... Shaft, 10... Steel ball, 11... Cylindrical housing,
12... Lid, 13... Shaft (fixed shaft), 15... Cylindrical shaft (rotating shaft), 16... Thrust bearing, 17... Spiral blade, 18... Small gear, 18a... Tooth surface of small gear meshing with large gear , 19...One-way clutch,
20... recess, 21... claw, 22... notch, 23... passage, 23a, 23b... opening.

Claims (1)

[Claims] 1. A cylindrical housing filled with oil, installed on one of a fixed base or a rotating base, and a fixed shaft along the axis of the housing, the tip of which protrudes from the lower part of the housing, and is fixedly installed within the housing. a cylindrical rotating shaft that is rotatably fitted on the outer circumferential surface of the fixed shaft and that is located within the housing and has a spiral blade on the outer circumferential surface; and a tip of the rotating shaft that protrudes from the lower part of the housing. , a small gear disposed via a one-way clutch and meshing with a large gear formed on the other of the fixed base or the swivel base; and a peripheral gear passing through the fixed shaft and located within the housing of the rotating shaft. 1. An automatic oil supply mechanism for a turning device, comprising a passage for passing the oil, the passage opening in a surface and a tooth surface of the small gear meshing with the large gear.