JP6764647B2 - Swivel greasing system and construction machinery - Google Patents

Description

The present invention relates to a greasing system for a swivel device and a construction machine.

In general, a construction machine such as a jib crane has a configuration in which an upper swivel body is provided on a post or a lower traveling body standing from the ground so as to be swivelable via a swivel device.

The swivel device includes, for example, an inner ring attached to the post or the lower traveling body and an outer ring attached to the upper swivel body, and a rolling element such as a roller is interposed between the inner ring and the outer ring. Internal teeth are engraved on the inner peripheral surface of the inner ring, a hydraulic or electric motor and a speed reducer are arranged on the upper swing body, and the output shaft of the speed reducer has the inner teeth of the inner ring in the swing device. Some are fitted with meshing pinions.

In the swivel device as described above, when the pinion is rotated via the speed reducer by driving the motor, the inner ring is fixed to the post and the lower traveling body side, so that the pinion rotates and becomes the inner teeth of the inner ring. The upper swivel body supported by the outer ring swivels with respect to the post and the lower traveling body.

For example, Patent Document 1 shows a general technical level related to the swivel device as described above.

Japanese Unexamined Patent Publication No. 2011-142766

By the way, in the swivel device as described above, it is necessary to suppress the wear of the rolling surface of the rolling element in the inner ring and the outer ring by supplying a lubricant such as grease between the inner ring and the outer ring, that is, by performing so-called lubrication. There is.

For this reason, in the past, a worker lubricated with a manual pump at the time of inspection, or lubricated with a timer control of an electric pump at the time of inspection or work.

However, as described above, when a worker lubricates with a manual pump at the time of inspection, the swivel device is usually stopped, and a lubricant such as grease is sufficiently applied to the gap where the rolling element is not located. Sometimes it was not supplied. If a sufficient amount of lubricant is not supplied to the gap, the coefficient of friction increases in the process of the rolling element moving between the inner ring and the outer ring during the operation of the swivel device, and the rolling element rolls in the inner ring and the outer ring. There was a risk of severe surface wear.

Similarly, when lubrication is performed by the timer control of the electric pump during inspection or work, if the operation of the swivel device is stopped, the lubricant is not sufficiently supplied to the gap, and the swivel device is operated. At times, an increase in the coefficient of friction between the rolling element and the outer ring and the inner ring was unavoidable, and the rolling surface of the rolling element on the inner ring and the outer ring was easily worn.

When trying to lubricate while the swivel device is in operation, a lubrication worker is required separately from the driver, which is inefficient.

The present invention has been made in view of the above-mentioned conventional problems, and is a swivel device capable of efficiently supplying a lubricant during operation and suppressing wear of a rolling surface of a rolling element in an inner ring or an outer ring. It seeks to provide lubrication systems and construction machinery.

The present invention is a greasing system for a swivel device in which a rolling element is interposed between an inner ring and an outer ring.
A swivel detector that detects whether the inner ring and the outer ring are moving relative to each other,
A greasing device that supplies a lubricant to the outer peripheral portion of the rolling element interposed between the inner ring and the outer ring.
It is provided with a controller that outputs a greasing execution command to the greasing device while the swivel detector detects that the inner ring and the outer ring are relatively moving .
The outer ring is provided with a greasing hole for supplying a lubricant from the greasing device to the outer peripheral portion of the rolling element, and sealing members are provided on the upper and lower outer peripheral edges of the inner ring to be provided on the outer ring. The inner peripheral portion is provided with a sealing member that comes into contact with the sealing member on the upper and outer peripheral edges of the inner ring, and is applied to a lubrication system of a swivel device.

In the greasing system of the swivel device, the swivel detector may detect that the inner ring and the outer ring are relatively moving based on the operation signal of the swivel operation lever.

Further, the present invention relates to a construction machine provided with a greasing system for the swivel device.

According to the lubrication system and the construction machine of the swivel device of the present invention, it is possible to efficiently supply the lubricant during operation, and it is possible to suppress the wear of the rolling surface of the rolling element in the inner ring and the outer ring, which is an excellent effect. Can be played.

It is a schematic block diagram which shows the Example of the greasing system of the swivel device of this invention. It is a partial fracture perspective view which shows the cage of the rolling element in the Example of the greasing system of the swivel device of this invention. It is a perspective view which shows an example of the swivel device to which the greasing system of this invention is applied. It is a side view which shows the jib crane as an example of the construction machine to which the greasing system of the swivel device of this invention is applied.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 4 are examples of the greasing system and the construction machine of the swivel device of the present invention.

FIG. 4 shows a jib crane as an example of a construction machine to which the greasing system of the swivel device of the present invention is applied.

The jib crane 1 shown in FIG. 4 is a tire-mounted rope-balanced jib crane, and the jib crane 1 is capable of traveling by the tires 2 and has an outrigger 3 overhanging and fixedly arranged on the lower traveling body 4 during cargo handling work. The upper swing body 6 provided with the jib 5 undulating is rotatably mounted via the swing device 7. The jib 5 is swiveled integrally with the upper swivel body 6 by the operation of the swivel device 7, and is undulated by the hoisting and lowering operation of the undulating rope 9 by the winch of the jib undulating device 8. Further, from the tip of the jib 5, the suspended load 13 is suspended via the suspending tool 12 by the suspended load rope 11 that is wound up and lowered by the winch of the hoisting device 10. In FIG. 4, reference numeral 14 denotes a cab of the jib crane 1.

As shown in FIGS. 1 and 3, the swivel device 7 in the present embodiment has an inner ring 20 attached to the lower traveling body 4 by tightening the bolt 30a and an outer ring 40 attached to the upper swivel body 6 by tightening the bolt 30b. A rolling element 50 (support roller 50a, retainer roller 50b, radial roller 50c) is interposed between the inner ring 20 and the outer ring 40, and inner teeth 60 are engraved on the inner peripheral surface of the inner ring 20. It is installed.

Further, a hydraulic or electric motor 70 and a speed reducer 80 are arranged on the upper swing body 6, and a pinion P that meshes with the inner teeth 60 of the inner ring 20 of the swing device 7 is provided on the output shaft of the speed reducer 80. It is fitted.

As shown in FIG. 2, the support roller 50a as the rolling element 50 is a first cage so that the axes extend radially in the radial direction of the swivel device 7 and are arranged at equal intervals in the circumferential direction of the swivel device 7. It is supported by 51. As shown in FIG. 2, the retain roller 50b as the rolling element 50 also has a second cage so that the axes extend radially in the radial direction of the swivel device 7 and are arranged at equal intervals in the circumferential direction of the swivel device 7. It is supported by 52. As shown in FIG. 2, the radial roller 50c as the rolling element 50 has a third cage 53 so that the axis extends parallel to the axis of the swivel device 7 and is arranged at equal intervals in the circumferential direction of the swivel device 7. Is supported by.

As shown in FIG. 1, the outer ring 40 includes a support roller 50a and a retain roller 50b as a rolling element 50 in which a lubricant such as grease is interposed between the inner ring 20 and the outer ring 40 from the greasing device 90. Grease holes 91, 92, 93 for supplying to the outer periphery of the radial roller 50c are bored. Seal members 20a and 20b are provided on the upper and lower outer peripheral edges of the inner ring 20, and a seal member 40a abutting on the seal member 20a is provided on the upper inner peripheral portion of the outer ring 40. The 20a, 20b, and 40a prevent the lubricant of the rolling element 50 supplied from the greasing device 90 between the inner ring 20 and the outer ring 40 via the greasing holes 91, 92, and 93 to leak to the outside. There is.

In the case of this embodiment, a swivel detector 100 is provided to detect whether or not the swivel device 7 is in operation, that is, whether or not the inner ring 20 and the outer ring 40 are relatively moving. The turning detector 100 detects that the inner ring 20 and the outer ring 40 are relatively moving based on the operation signal 102 of the turning operation lever 101 provided in the driver's cab 14.

While the inner ring 20 and the outer ring 40 by the turning detector 100 is detected that the relative motion, configured to output lubrication execution instruction 201 to the lubrication device 90 from the controller 200 It is done.

Next, the operation of the above embodiment will be described.

When the driver operates the turning operation lever 101 provided in the driver's cab 14, the pinion P is rotated via the speed reducer 80 by the drive of the motor 70, but the inner ring 20 in the turning device 7 is on the lower traveling body 4 side. Since the pinion P is fixed, the pinion P rolls along the inner teeth 60 of the inner ring 20 while rotating, and the upper swivel body 6 supported by the outer ring 40 in the swivel device 7 with respect to the lower traveling body 4. Turn.

At this time, the turning detector 100 detects that the inner ring 20 and the outer ring 40 are relatively moving based on the operation signal 102 of the turning operation lever 101, and the turning detector 100 detects the inner ring 20 and the outer ring. while 40 and is detected that the relative motion, greasing execution command 201 is outputted to the lubrication device 90 from the controller 200.

When the greasing execution command 201 is output from the controller 200 to the greasing device 90, a lubricant such as grease is supplied from the greasing device 90 to the inner ring 20 and the outer ring through the greasing holes 91, 92, 93. It is supplied between 40 and 40.

As a result, unlike the case where the worker lubricates with a manual pump at the time of inspection or lubricates with the timer control of the electric pump during inspection or work, the swivel device 7 is in the stopped state. Since it is operated without any operation, a sufficient amount of lubricant such as grease is supplied to the gap where the rolling element 50 is not located, and the lubricant is uniformly applied over the entire circumference between the inner ring 20 and the outer ring 40. It will be a pervasive form.

When the lubricant is sufficiently supplied to the gap and is uniformly distributed over the entire circumference between the inner ring 20 and the outer ring 40, the rolling element 50 is moved between the inner ring 20 and the outer ring 40 when the swivel device 7 is operated. In the process of moving, the coefficient of friction does not increase, and wear of the rolling surface of the rolling element 50 on the inner ring 20 and the outer ring 40 is suppressed.

Furthermore, there is no need for a greasing worker separately from the driver, and there is no concern that efficiency will deteriorate.

In this way, the lubricant can be efficiently supplied during operation, and the wear of the rolling surface of the rolling element 50 on the inner ring 20 and the outer ring 40 can be suppressed.

Then, in the case of this embodiment, the swivel detector 100 detects that the inner ring 20 and the outer ring 40 are relatively moving based on the operation signal 102 of the swivel operation lever 101. It is possible to surely grasp whether the swivel device 7 is in operation or in a stopped state, which is effective in improving reliability.

Further, if the greasing system of the swivel device 7 is provided in a construction machine such as a jib crane 1 as shown in FIG. 4, the cargo handling work can be smoothly carried out.

The greasing system and the construction machine of the swivel device of the present invention are not limited to the above-described embodiment, and are not limited to jib cranes, and any construction machine provided with the swivel device can be used. It goes without saying that various changes can be made without departing from the gist of the present invention, such as being applicable.

1 Jib crane (construction machinery)
7 Swivel device 20 Inner ring 40 Outer ring 50 Rolling element 90 Greasing device 100 Swivel detector 101 Swivel operation operation lever 102 Operation signal 200 Controller 201 Greasing execution command

Claims (3)

It is a greasing system for a swivel device in which a rolling element is interposed between the inner ring and the outer ring.
A swivel detector that detects whether the inner ring and the outer ring are moving relative to each other,
A greasing device that supplies a lubricant to the outer peripheral portion of the rolling element interposed between the inner ring and the outer ring.
It is provided with a controller that outputs a greasing execution command to the greasing device while the swivel detector detects that the inner ring and the outer ring are relatively moving .
The outer ring is provided with a greasing hole for supplying a lubricant from the greasing device to the outer peripheral portion of the rolling element, and sealing members are provided on the upper and lower outer peripheral edges of the inner ring to be provided on the outer ring. A lubrication system for a swivel device, characterized in that a sealing member is provided on the inner peripheral portion in contact with the sealing member on the upper and outer peripheral edges of the inner ring . The greasing system for a swivel device according to claim 1, wherein the swivel detector detects that the inner ring and the outer ring are relatively moving based on an operation signal of the swivel operation lever. A construction machine provided with the greasing system for the swivel device according to claim 1 or 2.

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