JPS592332Y2 - Swivel bearing device for rotating body - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a swing bearing device for a revolving body such as an upper swing type excavator or a truck crane.

In this type of slewing bearing device, it is necessary to replenish the vehicle by injecting grease from around the vehicle with a grease gun every predetermined operating time.

The present invention is a rotating bearing for a rotating body that can be automatically greased every time the rotating body rotates, eliminating the need for greasing by a conventional worker and improving maintainability. The aim is to provide equipment.

The configuration will be explained below based on the embodiment shown in the drawings.

In the figure, 1 shows an upper revolving type excavator to which the present invention is applied, 2 is an upper revolving body, and 3 is a lower running body. These are an outer race 4 on the upper rotating body 2 side and a lower running A swing bearing device 6 consisting of an inner race 5 on the body 3 side
It is rotatably supported.

7, 7 are sealing members that seal the top and bottom of this swing bearing 6.

An internal gear 8 is provided on the inner surface of the inner race 5, and a swing pinion 9 provided on the upper rotating body 2 side is meshed with the internal gear 8. This swing pinion 9 is driven by a rotational drive source 10 such as a hydraulic motor. Inner race 5 by driving
The upper revolving body 2 is configured to rotate relative to the upper rotating body 2.

Greasing holes 11 are provided at several locations in the circumferential direction of the inner race 5 to communicate the bearing surface with the tooth bottom of the internal gear 8.

Further, a cylindrical wall 12 is fixed to the bottom plate in the inner race 5, and a swing pinion 9 is disposed between the cylindrical wall 12 and the internal gear 8.
The passage 13 is filled with grease, and a seal 14 is provided between the cylindrical wall 12 and the upper revolving body 2 to prevent the grease from leaking.

When the swing pinion 9 is driven to rotate the upper revolving body 2, the grease bitten into the meshing part between the swing pinion 9 and the internal gear 8 passes through the greasing hole 11 from the bottom of the internal gear 8. and is extruded onto the bearing surface.

At this time, excess grease on the bearing surface is returned into the inner race from the other greasing holes 11.

The present invention is as described above, and consists of an outer race 4 and an inner race 5, and an internal gear 8 is provided inside the inner race 5, and the rotation of the swing pinion 9 meshing with the internal gear 8 causes the outer race 4 and the inner race to In a rotating bearing device for a rotating body in which a rotating body connected to one side of the rotating body rotates, greasing is provided at several locations in the circumferential direction of the inner race 5 to communicate the bearing surface with the tooth bottom of the internal gear 8. A hole 11 is provided, and a cylindrical wall 12 is fixed to the bottom plate in the inner race 5 to form a passage 13 through which the swing pinion 9 passes.
Furthermore, since both ends in the axial direction of the swing bearing 6 consisting of the outer race 4 and the inner race 5 are sealed with the seal members 7, 7, the engagement between the internal gear 8 and the swing pinion 9 allows the swing pinion 9 to pass through the passage 13 in advance. The filled oil such as grease is automatically supplied to the bearing surface through the greasing hole 11.

Therefore, regular greasing work using a working tool on the bearing surface is omitted, improving maintainability.

Further, according to the present invention, since the passage 13 filled with oil such as grease is constructed by fixing the cylindrical wall 12 to the bottom plate within the inner race 5, the oil reservoir can be constructed with a simple structure.

Furthermore, when the internal gear 8 and the swing pinion 9 are lubricated by meshing with each other, the oil and fat supplied to the bearing surface through one greasing hole 11 flows into the passage 13 through the other greasing hole 11. This oil and fat is returned and circulated through the passage and the bearing surface, so that the bearing part is continuously supplied with lubrication.

Furthermore, the oil and fat supplied to the bearing section is sealed by the seal member 7.7 and does not leak outside, and the oil and fat that is maintained in this bearing section is circulated as described above, so that the oil and fat supplied to the bearing section are sealed by the seal member 7.7. No excessive pressure is applied to the member 7.7, and the sealing members 7, 7 are not damaged.

[Brief explanation of drawings]

FIG. 1 is a side view of an upper swing type excavator to which the swing bearing device of the present invention is applied, FIG. 2 is a sectional view of the main part thereof, and FIG. 3 is a plan view of the main part. 4 is the outer race, 5 is the inner race, 8 is the internal gear,
9 is a swing pinion, and 11 is a greasing hole.

Claims (1)

[Scope of utility model registration request] It consists of an outer race 4 and an inner race 5, and an internal gear 8 is provided inside the inner race 5, and the rotation of a swing pinion 9 that meshes with the internal gear 8 causes a revolving body connected to one of the outer race 4 and the inner race 5 to rotate. In the rotating bearing device for a rotating body, greasing holes 11 are provided at several locations in the circumferential direction of the inner race 5 to communicate the bearing surface of the inner race 5 with the bottom of the tooth of the internal gear 8.
An inner cylinder wall 12 is fixed to the inner bottom plate to form a passage 13 through which the swing pinion 9 passes, and both ends in the axial direction of the swing bearing 6 consisting of the outer race 4 and the inner race 5 are sealed with seal members 7, 7. A swing bearing device for a swing body, characterized in that: