JPH0138931B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a swing device for a construction machine that supports a working machine on a vehicle so as to be able to swing freely.

As shown in FIG. 1, a conventional swing device includes a swing bearing A consisting of an inner ring 2 and an outer ring 5 that are relatively rotatable, and an inner ring 2 having internal teeth 1 of the swing bearing A attached to a vehicle frame 3. The outer ring 5 is fixed by a large number of bolts 4, and the outer ring 5 is fixed to the rotating body frame 6 by a large number of bolts 7, and the internal teeth 1 and the rotating pinion 8 supported on the rotating body frame 6 side are engaged. In particular, the rotating body frame 6 and the outer ring 5 were rotationally driven together with the rotation of the turning pinion 8.

The slewing bearing constructed as described above has the advantage of being superior in strength because it is supported by a large number of bolts, but as construction machinery has become heavier, it has become difficult to use slewing bearings for working machines. In the case where the vehicle cannot be driven on public roads to prevent damage to a bridge or the like until it is separated from the site, there is a drawback that a large amount of time is required to attach and remove a large number of bolts.

SUMMARY OF THE INVENTION An object of the present invention is to provide a novel turning device that can be easily separated and assembled and is firmly installed on a vehicle frame.

Next, the configuration of the present invention will be explained in detail based on one specific embodiment.

Reference numeral 9 denotes an insertion ring that is integrally fixed concentrically to the lower part of the inner ring 2 of the swing bearing A by a large number of bolts 20. On the outer periphery of the lower part of the insertion ring 9, protrusions 9' are arranged at equal intervals. It is set in. Reference numeral 10 denotes a receiving ring, which is fixed to the vehicle frame 3 with a large number of bolts 11, and has a receiving seat 10' formed in a concave shape at the lower part of the inner peripheral side to receive the protrusion 9'. is provided facing the protrusion 9'. Moreover, the inner periphery between the receiving seats 10' and 10' is an inclined surface 1 that slopes inward as it goes downward.
0'' is formed.

In order to fit the insertion ring 9 into the receiving ring 10, the protrusion 9' of the insertion ring 9 and the inclined surface 10'' are opposed to each other, and the insertion ring 9 is moved downward.
0'' as a guide, the insertion ring 9 occupies a position that is not offset in any direction in the diameter direction with respect to the receiving ring 10. Next, the insertion ring 9 is rotated and the protrusion 9' is placed in the receiving seat 10'. 12 is a positioning pin provided on the lower surface of the insertion ring 9, and this positioning pin 12 rotates the protrusion 9' to fit it into the receiving seat 10'. At this time, the insert ring 9 comes into contact with the guide plate 13 fixed to the vehicle frame 3, and this abutting state is the proper fitting state of the insertion ring 9 into the receiving ring 10 described above.
Reference numeral 14 denotes a rotation drive unit for the turning pinion 8. The rotation drive unit 14 uses an engine and a hydraulic unit (not shown) provided on the revolving body frame 6 as its driving source. Reference numeral 15 denotes a hydraulic cylinder provided on the vehicle frame 3 at the center inside the receiving ring 10. A wedge member 16 is disposed at the tip of the piston rod of this hydraulic cylinder 15. By driving the hydraulic cylinder 15 to extend when the insertion ring 9 is properly fitted, the wedge member 16 pushes the insertion ring 9 upward, and as a result, the insertion ring 9 is pressed against the receiving ring 10 and becomes firm. It becomes a state of support. 17 is a guide plate provided on the vehicle frame 3 to guide the movement of the wedge member 16. Reference numeral 16' denotes a recess provided in the center of the wedge member 16, and a detent pin 18 provided on the lower surface of the insertion ring 9 is inserted into the recess 16' to secure the insertion ring 9 into the receiving ring 10.
The fitting is performed by driving the hydraulic cylinder 15 to extend in the proper fitting state. Therefore, this fitting completely restricts movement of the insertion ring 9 relative to the receiving ring 10 in the circumferential direction. The locking pin 18 contacts the guide plate 17 when the insertion ring 9 is rotated in a direction to remove it from the receiving ring 10, and the positional relationship is such that the insertion ring 9 can be moved upward in this abutting position. There is also. Numeral 19 is a fixing device whose purpose is to fix the rotating body frame 6. When the rotating body frame 6 is fixed, the rotating pinion 8 rotates and drives the rotating body frame 6 during clay work. The receiving ring 10 and the insertion ring 9 can be separated by rotating the inner ring 2 using the .

Next, the action will be explained.

Regarding the assembly of the rotating body frame 6 to the vehicle body frame 3.

In this case, the vehicle should be driven under the revolving body frame 6 supported by jacks (not shown) so that the insertion ring 9 and the receiving ring 10 face each other to reduce the jack. Lower the 9th side.

At this time, it is conceivable that the inclined surface 10'' and the protrusion 9' are slightly shifted in the circumferential direction and the diametrical direction, but the shift in the circumferential direction can be avoided by fixing the rotating body frame 6 and turning the rotating pinion 8. The deviation in the diametrical direction can be corrected by rotationally driving the insertion ring 9 and the receiving ring 10.
The inclined surface 10'' acts as a guide and can be corrected when lowering into the interior.

In this way, the protrusion 9' is brought into contact with the lower position of the inclined surface 10''. This state corresponds to the state shown in FIG. 3. Next, when the turning pinion 8 is driven, the insertion ring 9 rotates. The positioning pin 12 hits the guide plate 13 and its rotation is restricted. This state is the state in which the insertion ring 9 is properly fitted into the receiving ring 10. Next, when the hydraulic cylinder 15 is driven to extend, the wedge The member 16 pushes the insertion ring 9 upward, and the recess 16' engages with the locking pin 18, and the insertion ring 9 is completely fixed to the receiving ring 10 and attached to the rotating body frame 6. Assembly to the vehicle body frame 3 is completed.

Regarding separation of the rotating body frame 6 from the vehicle frame 3.

In this case, the rotating body frame 6 is fixed to the vehicle frame 3 by the fixing device 19. next,
The hydraulic cylinder 15 is contracted to release the pressing state of the insertion ring 9 against the receiving ring 10 by the wedge member 16, and at the same time, the fitting state between the recess 16' and the detent pin 18 is released. Subsequently, when the rotation pinion 8 is driven to rotate the insertion ring 9, the rotation stop pin 18 comes into contact with the guide plate 17. In this state, the revolving body frame 6 can be separated from the vehicle frame 3 by releasing the fixed state of the revolving body frame 6 by the fixing device 19 and driving the jack to extend.

In the above embodiment, the insertion ring 9 was provided on the inner ring 2 side and the receiving ring 10 was provided on the vehicle frame 3 side, but as shown in FIG. A ring may be provided. Alternatively, the inner ring may be fixed to the revolving body frame 6, the outer ring 5 having the insertion ring at the bottom may be provided with external teeth, and the outer ring may be driven by a turning pinion.

As described above, the present invention allows for easy disassembly and assembly, and when the rotating body frame is mounted on the vehicle frame by fitting the insertion ring into the receiving ring, the insertion ring is inserted into the receiving ring by the wedge material. In addition to being pressed against the ring and eliminating looseness, the rotation of the insertion ring is restricted by fitting the recess into the locking pin, so there is no risk of the insertion ring coming off from the receiving ring, and the work equipment can be rotated smoothly for work. It is something that can be done.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a part of a conventional swing device, FIG. 2 is a sectional view showing an embodiment of the present invention,
FIG. 3 is a schematic plan view of essential parts showing one embodiment of the present invention, and FIG. 4 is a sectional view of a swing device showing another embodiment of the present invention. 6: rotating body frame, 8: rotating pinion,
2: Inner ring, 5: Outer ring, 1: Teeth, A: Swivel bearing,
9, 10: Ring, 3: Vehicle frame, 15: Hydraulic cylinder, 16: Wedge material, 18: Stopping pin,
16': recess.

Claims (1)

[Scope of Claims] 1. A swing bearing consisting of a revolving body frame, a swing pinion provided on the revolving body frame, and a relatively rotatable inner ring and an outer ring, with either the outer ring or the inner ring fixed to the revolving body frame. , teeth provided on the side of the inner ring and outer ring of the swing bearing that are not fixed to the swing body frame and mesh with the swing pinion, a ring provided concentrically at the lower part of the inner ring or outer ring provided with the teeth, and a ring provided on the vehicle frame. A ring that is fixed and inserts the ring from above and makes it impossible to remove the ring from above by rotation of the ring in this inserted state, and a hydraulic cylinder that is fixed on the vehicle frame inside the ring. A turning device for a construction machine, comprising a wedge member that pushes up the ring by coming into contact with the lower surface of a ring provided at the lower part of the inner ring or outer ring provided with the teeth by extension motion. 2. A rotating body frame, a swinging pinion provided on the rotating body frame, a swing bearing comprising a relatively rotatable inner ring and an outer ring, one of which is fixed to the rotating body frame, and an inner ring of the swing bearing. and a tooth provided on the side of the outer ring that is not fixed to the revolving body frame and meshes with the turning pinion, a ring provided concentrically at the lower part of the inner ring or outer ring provided with the tooth, and a ring that is fixed to the vehicle frame and that engages the turning pinion from above. A ring which is inserted and which makes it impossible to remove the ring upward by rotation of the ring in this inserted state, and in this fitted state, is fixed on the vehicle frame inside the ring which is fixed to the vehicle frame. The hydraulic cylinder is characterized by being provided with a recess that is fitted into a detent pin provided on the lower surface of the ring provided at the lower part of the inner ring or outer ring provided with the teeth by the extension movement of the hydraulic cylinder. Swivel device for construction machinery.