JP2003119827A - Swivel device of construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a swivel device of a construction machine capable of discharging metallic chips trapped from lubricating oil at the appropriate time without discharging the lubricating oil from the swivel device. SOLUTION: A lower housing 1 is provided with a guide member 3 and a communication path 2A is formed in the guide member 3. One side of the communication path 2A is in communication with the interior of the lower housing 1 and the other side opens at a position higher than the upper surface of lubricating oil 124. A plate-shaped member 6 is positioned in the communication path 2A and a magnetic body 8 placed in a position facing the interior of the lower housing 1 is mounted to the plate-shaped member 6. By taking the plate-shaped member 6 out of the communication path 2A, metal chips 123 trapped by the magnetic body 8 can be removed from the interior of the lower housing 1 and discharged out of the guide member 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction machine such as a hydraulic excavator or a crane equipped with an upper revolving structure which is rotatably mounted on an upper part of a lower traveling structure as a base, and more particularly to a lower traveling structure. The present invention relates to a turning device connected to a turning wheel between the upper turning body and the upper turning body.

[0002]

2. Description of the Related Art A conventional turning device connected to a turning wheel between a base and an upper revolving structure in a construction machine,
The turning device applied to the hydraulic excavator shown in FIGS. 7 and 8 will be described.

In FIG. 7, reference numeral 101 denotes a hydraulic excavator body. Reference numeral 102 denotes an upper swing body of the hydraulic excavator main body 101, and the upper swing body is provided with a driver's seat, a machine room, and the like. 103 is a hydraulic excavator main body 1
01 is a lower traveling body (base), and an upper revolving superstructure 102 is rotatably mounted on the upper portion thereof. A work machine 106 is attached to a front portion of the hydraulic upper-part turning body 102 so as to be able to lift and lower.

Reference numeral 104 is a slewing wheel provided between the upper slewing body 102 and the lower traveling body 103. Its slewing wheel 1
Reference numeral 04 denotes an inner ring 104A and an outer ring 104B as shown in FIG.
And a rolling element 104C. Inner ring 104A
Is attached to the lower traveling body 103 with bolts 107, and inner teeth 104D are formed on the inner peripheral side of the inner ring 104A thereof. The outer ring 104B is attached to the upper swing body 102 by a bolt (not shown). In addition, the rolling element 1 is provided between the inner ring 104A and the outer ring 104B.
04C is interposed.

Reference numeral 105 denotes a turning device, which is a turning motor 11
0 and a speed reducer 111.

Next, the detailed structure of the turning device 105 is shown in FIG.
Will be explained. The turning device shown in FIG. 8 is disclosed in the official gazette of Japanese Patent Laid-Open No. 6-330537.

The speed reducer 111 includes a plurality of bolts 111A.
The upper housing 112 and the lower housing 113 are connected to each other, and the planetary gear reduction mechanism 114 housed in the upper housing 112. The swing motor 110 is attached to the upper side of the upper housing 112 by a plurality of bolts 110A, and the output shaft 115 of the swing motor 110 is connected to the planetary gear reduction mechanism 114. Further, in the lower housing 113 on the lower side of the planetary gear reduction mechanism 114, the planetary gear reduction mechanism 114 is provided.
Bearing 117, upper bearing 1 for supporting the output shaft 116 of
Two bearings 18 are provided, and a pinion 119 is provided below the output shaft 116.

The lower bearing 117 is located at a lower position of the lower housing 113, and the lower housing 113 and the output shaft 11 are provided.
6 is interposed. The lower bearing 117 includes an inner ring 117A fitted to the output shaft 116 and an outer ring 117B fitted to the inner peripheral side of the lower housing 113, as shown in FIG.
And a plurality of rolling elements 117C interposed between the inner ring 117A and the outer ring 117B.

The upper bearing 118 is located above the lower housing 113 and is located above the lower housing 113 and the output shaft 11.
6 is interposed. The lower bearing 118 includes an inner ring 118A fitted to the output shaft 116 and an outer ring 118B fitted to the inner peripheral side of the lower housing 113, as shown in FIG.
And a plurality of rolling elements 118C interposed between the inner ring 118A and the outer ring 118B.

The pinion 119 is an internal tooth 1 of the slewing wheel 104.
The rotation of the turning motor 110 is transmitted to the pinion 119 so that the pinion 119 is engaged with the internal teeth 1
By revolving the inner periphery of 04D, the lower traveling body 103
On the other hand, the upper swing body 102 is configured to swing. That is, the turning device 105 is connected to the turning wheel 104 via the pinion 119.

Reference numeral 120 denotes an annular sleeve fitted to the output shaft 116 at a lower position of the lower housing 113, and the sleeve 120 is provided between the lower end surface of the inner ring 117A of the lower bearing 117 and the upper end surface of the pinion 119. It is sandwiched between.

Reference numeral 121 denotes a seal, which is the lower housing 1.
It is inserted between 13 and the sleeve 120. Reduction gear 111, upper housing 112 and lower housing 1
Lubricating oil 124 injected into 13 is sealed inside them by a seal 121.

Reference numeral 122 denotes a revolving frame of the upper revolving structure 102, and the revolving device 105 is provided on the revolving frame 122.
Are attached by a plurality of bolts 113A.

Reference numeral 123 denotes metal abrasion powder generated by the meshing of gears forming the planetary gear reduction mechanism 114.

In the lower housing 113, the communication passage 12
6 is formed, and the plug 125 with the magnetic body is inserted into the communication passage 126. Magnetic plug 125
Is provided with a brush-like magnetic material (magnet) 127 at a position facing the lower housing 113.

The operation of the above configuration will be described.

When the turning motor 110 is driven, its rotation is transmitted to the output shaft 115, and the rotation is reduced by the planetary gear reduction mechanism 114 connected to the output shaft 115,
High torque is transmitted to the output shaft 116.

The rotation of the output shaft 116 is transmitted to the meshing portion between the pinion 119 and the inner teeth 104D of the turning wheel 104, and the pinion 119 revolves inside the inner ring 104A.
As a result, the upper swing body 101 performs a swing operation with respect to the lower traveling body 102.

During the above-described turning operation, meshing of gears in the planetary gear speed reduction mechanism 114 generates metal abrasion powder 123, which is mixed into the lubricating oil 124. The metal abrasion powder 123 gradually descends and adheres to the magnetic substance 127 of the magnetic substance plug 125.

The above-described turning device 105 has the same structure as a turning device of a crane having a turning body.

[0021]

In the conventional turning device for the construction machine described above, the metal abrasion powder is captured and removed by the plug with the magnetic material, but there are the following problems.

In order to confirm the trapped state of the metal wear powder or to remove the metal wear powder, after the lubricating oil is discharged from the speed reducer, the upper housing and the lower housing constituting the swivel device, the magnetic It is necessary to take out the body plug from the communication passage of the lower housing. Therefore, the work must be done at the same time as the replacement of the lubricating oil. Therefore, it is not always possible to remove the metal abrasion powder at an appropriate time.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to remove any metal abrasion powder in the captured lubricating oil without discharging the lubricating oil from the turning device. It is an object of the present invention to provide a swing device for a construction machine that can be removed at an appropriate time.

[0024]

In order to solve the above-mentioned problems, a swivel device according to the present invention comprises a swivel motor, and a speed reducer arranged below the swivel motor and connected to an output shaft of the swivel motor. A bearing that supports the output shaft of the reduction gear in a housing located on the lower side of the reduction gear, lubricating oil injected into the housing to lubricate the reduction gear, and a magnetic material arranged in the housing The present invention is applied to a turning device of a construction machine in which the turning device including the and is connected to a turning wheel between a base and a turning body.

The feature of the constitution adopted by the invention of claim 1 is that the housing is provided with a guide means, a communication passage is formed in the guide means, and one side of the communication passage is made to communicate with the inside of the housing, and the other side. The side is opened at a position higher than the oil surface position of the lubricating oil, the connecting means is arranged in the communication passage, and the magnetic body arranged at a position facing the housing is attached to the connecting means.

The invention of claim 2 is applied to a turning device of a construction machine similar to that of claim 1.

The features of the configuration adopted by the invention of claim 2 are:
The guide means is formed by a tubular guide member, the guide member is attached to the outer peripheral portion of the housing in the vicinity of the magnetic body, and one end side of the guide member is connected to the housing. This is because it is communicated with the passage and the other side is opened at a position higher than the oil level of the lubricating oil.

The invention of claim 3 is applied to a turning device of a construction machine similar to that of claim 1.

The features of the configuration adopted by the invention of claim 3 are:
The connecting means is arranged in the communication passage of the guiding means, and is composed of a plate-shaped member formed of an elastic member, the magnetic body is attached to one end side of the plate-shaped member, and the other end side is an opening of the guide member. It is located on the side.

The invention of claim 4 is applied to a turning device of a construction machine similar to that of claim 3.

The features of the configuration adopted by the invention of claim 4 are:
A handle is provided on the other end side of the plate member.

The invention of claim 5 is applied to a turning device of a construction machine similar to that of claim 1.

The features of the configuration adopted by the invention of claim 5 are as follows:
A magnetic shielding cover is arranged at a portion of the magnetic body facing the communication passage.

The invention of claim 6 is applied to a turning device of a construction machine similar to that of claim 1.

The features of the configuration adopted by the invention of claim 6 are:
When an auxiliary cover is arranged around the magnetic body in the communication passage and the magnetic body is taken out of the guide means,
The auxiliary cover protects the tip of the magnetic body.

The invention of claim 7 is applied to a turning device of a construction machine similar to that of claim 1.

The features of the configuration adopted by the invention of claim 7 are as follows:
The level gauge is provided at a position corresponding to the oil level of the lubricating oil in the plate-shaped member in the communication passage.

[0038]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment of the present invention.
2 and FIG. 1 is a sectional side view showing a turning device for a construction machine according to the present invention, and FIG. 2 is a partially enlarged sectional view showing a one-dot chain line portion A in FIG. 1 and 2, the same components as those in FIG. 8 are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 1, reference numeral 1 denotes a cylindrical lower housing, and an upper housing 112 is arranged on the upper side thereof. A planetary gear reduction mechanism 114 is provided inside the upper housing 112, and a turning motor 110 is arranged on the upper side. The output shaft 116 of the planetary gear reduction mechanism 114 is supported by a lower bearing 117 and an upper bearing 118 that are vertically arranged in the lower housing 1. The swing motor 110 and the upper housing 112 are connected by a plurality of bolts 110A, and the upper housing 112 and the lower housing 1 are connected by a plurality of bolts 111A. The lower part of the lower housing 1 is attached to the swivel frame 122 by a plurality of bolts 1A.

Reference numeral 2 denotes a communication passage formed so as to penetrate the circumferential wall of the lower housing 1, and the communication passage is located between the lower bearing 117 and the upper bearing 118. A counterbore 14 is formed in a portion of the outer side of the lower housing 1 where the communication passage 2 is located. Inside the communication passage 2, a screw 15 for attaching the guide member 3 to the middle thereof is formed. The inner diameter of the communication passage 2 is formed to have substantially the same size as the inner diameter of the guide member 3, and the capturing means 7 having the magnetic body 8 in the communication passage 2 is formed.
Are arranged so as to face the lower housing 1.

Reference numeral 3 denotes a guide member formed by using a metal pipe, and the guide member is provided with a communication passage 2A communicating with the communication passage 2. One end of the guide member 3 is screwed into and connected to the communication passage 2 of the lower housing 1, and the other end is opened at a position higher than the oil level of the lubricating oil 124.

The guide member 3 is supported by the turning device 5 via the bracket 4, and one end of the bracket 4 is fixed to the turning motor 110 by welding. Further, a support hole 4A for inserting the guide member 3 is formed on the other end side of the bracket 4.

Reference numeral 6 denotes a plate-shaped connecting member (hereinafter referred to as a plate-shaped member), which is inserted into the communication passage 2A of the guide member 3. At the end of the plate-shaped member 6 on the side of the lower housing 1, a capturing means 7 including a magnetic body 8 and a magnetic shield 9 is attached. The tip of the magnetic body 8 is arranged so as to face the space 128 in the lower housing 1. The plate member 6 is formed of a flexible metal spring material and can follow the bending of the guide member 3.

The magnetic-shield cover 9 is made of aluminum which is a non-magnetic material, and the magnetic-shield cover 9 is provided on the outer periphery of the magnetic body 8 other than the tip end portion thereof, that is, the portion of the magnetic body 8 facing the communication passages 2, 2A. It is arranged.

Denoted at 12 is an attaching / detaching means for inserting / removing the plate-like member 6 into / from the opening of the guide member 3, and comprises a cap 10, a handle 11 and a lid member 13.

Reference numeral 10 denotes an umbrella-shaped cap attached to the other end of the plate member 6, and the cap is made of rubber and is fitted into the other end of the plate member 6. Further, an annular handle 11 for inserting and removing the plate member 6 from the guide member 3 is screwed into the cap 10.
A lid member 13 for sealing the guide member 3 is attached inside the cap 10. The lid member 13 is made of resin, and the handle 11 is made of metal.

The present embodiment has the structure as described above, and its operation will be described below.

The upper revolving structure 10 with respect to the lower traveling structure 103
When pressure oil is supplied to the swivel motor 110 to rotate the swivel motor 110 in order to swivel the motor 2, the rotation is transmitted to the planetary gear speed reduction mechanism 114 via the output shaft 115 of the swivel motor 110. The rotation is reduced by the planetary gear reduction mechanism 114, and then transmitted to the output shaft 116. The rotation transmitted to the output shaft 116 becomes a low speed and large torque, and is transmitted to the pinion 119.
Is rotated by meshing with the internal teeth 104D of the inner ring 104A, the upper revolving structure 101 revolves with respect to the lower traveling structure 102.

At this time, metal abrasion powder 123 is generated in the meshing portion of the gears of the planetary gear reduction mechanism 114 and the sliding portions of the other constituent members, and the metal abrasion powder 123 is used as the lubricating oil 12.
Mix in 4. The metal abrasion powder 123 is the output shaft 1
It gradually descends while rotating around 16 together with the lubricating oil 124. When the metal abrasion powder 123 comes between the upper bearing 118 and the lower bearing 117, it is captured by the tip of the magnetic body 8.

By pulling out the handle 11 from the guide member 3, the cap 10 and the lid member 13 of the attaching / detaching means 12 are pulled out from the communication passage 2A, and the plate member 6 and the catching means 7 are taken out. Thereby, the magnetic body 8 of the capturing means 7
The metal abrasion powder 123 captured by is discharged to the outside of the guide member 3.

After that, the metal wear powder 123 is removed from the magnetic body 8.
Remove and remove.

Thus, according to the present embodiment, since the opening of the communication passage 2A in the guide member 3 is higher than the oil level of the lubricating oil 124, the metal abrasion powder 123 is transferred from the guide member 3 to the outside. At the time of draining, it is not necessary to drain the lubricating oil 124 from the turning device 5.

To return the plate-shaped member 6 and the capturing means 7 to the state shown in FIG. 2, the plate-shaped member 6 and the capturing means 7 are inserted into the communication passage 2A by the handle 11, and the cap 10 and the lid of the attaching / detaching means 12 are inserted. By bringing the members 13 into contact with the openings of the communication passages 2A, they are easily positioned in their original positions.

As described above, by removing the metal abrasion powder 123 from the lubricating oil 124 at any appropriate time, the lubricating oil 124 can be kept in a good condition.

Further, by confirming the amount or size of the metal abrasion powder 123, it is possible to detect the malfunction of the turning device 5 at an early stage.

Further, since the cap 10 of the attaching / detaching means 12 covers the opening of the guide member 3, it is possible to prevent rainwater and the like from entering.

By covering the magnetic body 8 with the magnetic shield 9, the lower housing 1 is prevented from being magnetized.

Next, the second embodiment of the present invention will be described with reference to FIG.
4 and FIG. In this embodiment, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 3 is a partially enlarged sectional view corresponding to FIG. 2, and FIG. 4 is a partially enlarged sectional view showing the positional relationship between the capturing means and the auxiliary cover when the capturing means in FIG. 3 is taken out of the housing. It is a figure.

The difference from the above-described first embodiment is that a cup-shaped auxiliary cover 20 is arranged near the capturing means 7. The auxiliary cover 20 includes a cylindrical portion 20A that covers the outer periphery of the capturing means 7, and a bottom surface portion 20B that is slidably inserted into the plate member 6, and the bottom surface portion 20B is the capturing means in the plate member 6. It is located between the stopper 21 attached near 7 and the capturing means 7.

The guide member 3 is provided in the lower housing 23.
The stepped portion (contact portion) 24 formed in the communication passage 2A is inserted and connected.

The auxiliary cover 20, as shown in FIG. 3, when the capturing means 7 faces the lower housing 23,
The open end of the tubular portion 20A is in contact with the step portion 24 of the lower housing 23. At that time, the bottom surface portion 20B is in contact with the stopper 21.

The auxiliary cover 20 has the lower housing 2
When the abutment means 7 is in contact with the stepped portion 24, the capturing means 7 is in a position facing the lower housing 1A.

The present embodiment has the structure as described above, and its operation will be described below.

When pressure oil is supplied to the swing motor to rotate the swing motor, the rotation is reduced by the planetary gear reduction mechanism and then transmitted to the output shaft 116. Its output shaft 11
The rotation transmitted to 6 is transmitted to the pinion, and the pinion meshes with the internal teeth of the slewing wheel to rotate, whereby the upper slewing body revolves with respect to the lower traveling body.

At this time, metal wear powder 123 is present on the meshing portion of the gears of the planetary gear reduction mechanism and on the sliding portions of the other components.
Occurs, and the abrasion powder 123 of the metal is mixed in the lubricating oil 124. The metal abrasion powder 123 is captured by the magnetic body 8 inside the lower housing 23.

By pulling the handle from the guide member 3, the cap and lid member of the attaching / detaching means are pulled out from the communication passage 2A, and the plate member 6 and the catching means 7 are taken out. At this time, the metal abrasion powder 123 captured by the magnetic body 8 of the capturing means 7 is discharged to the outside of the guide member 3.

The operation up to this point is the same as the operation in the first embodiment described above.

When the plate member 6 is taken out of the guide member 3, the bottom surface portion 20B of the auxiliary cover 20 slides with respect to the plate member 6 toward the capturing means 7.

As a result, the capturing means 7 is inserted to the position where it comes into contact with the bottom surface portion 20B of the auxiliary cover 20, and the tubular portion 20
It is located in A together with the metal abrasion powder 123.

After that, the capturing means 7 and the auxiliary cover 20
Is taken out of the guide member 3 through the communication passage 2A together with the plate member 6.

At this time, the metal abrasion powder 123 is absorbed by the magnetic substance 8
In addition, since it is positioned inside the auxiliary cover 20 and is protected, it does not come into contact with the lower housing 23 and the guide member 3 during its movement.

Therefore, when the metal abrasion powder 123 is taken out from the guide member 3, the state in which the metal abrasion powder 123 is attached to the capturing means 7 is maintained.

In this embodiment, in addition to the effects of the first embodiment described above, when the plate-shaped member 6 is taken out of the guide member 3, the metal abrasion powder 12 attached to the capturing means 7 is removed.
3 is located in the auxiliary cover 20, the metal wear powder 1
23 can be reliably discharged to the outside of the turning device.

In the above-mentioned embodiment, the auxiliary cover 20 is provided between the stopper 21 and the catching means 7 and the plate member 6 is provided.
The auxiliary cover 20 is fixed on the side of the capturing means 7 facing the lower housing 23 so that the auxiliary cover 20 can be arranged in the lower housing 23, so that the capturing means 7 is always slid. The metal abrasion powder 123 may be kept attached.

Next, a third embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the same components as those in the first and second embodiments are designated by the same reference numerals, and the description thereof will be omitted. FIG. 5 shows a third embodiment and is a cross-sectional side view of a turning device of a construction machine. FIG. 6 is a partially enlarged sectional view showing a one-dot chain line portion B around the level gauge plate in FIG.

The difference between the first and second embodiments described above is that the level gauge plate 30 is attached to the plate member 6. The level gauge plate 30 is made of metal, and has a range R for measuring the oil level,
An H mark is provided on the upper side and an L mark is provided on the lower side, and a horizontal line S serving as a reference plane is marked between H and L. The level gauge plate 30 is attached to the plate member 6 in the communication passage 2A by welding, and its horizontal line S
Is provided corresponding to an appropriate oil level of the lubricating oil 124 that lubricates the inside of the speed reducer 111B.

The present embodiment has the structure as described above, and its operation will be described below.

The upper revolving structure 10 with respect to the lower traveling structure 103
When pressure oil is supplied to the swivel motor 110 to rotate the swivel motor 110 in order to swivel the motor 2, the rotation is transmitted to the planetary gear speed reduction mechanism 114 via the output shaft 115 of the swivel motor 110. The rotation is reduced by the planetary gear reduction mechanism 114, and then transmitted to the output shaft 116. The rotation transmitted to the output shaft 116 becomes a low speed and large torque, and is transmitted to the pinion 119.
Is rotated by meshing with the internal teeth 104D of the inner ring 104A, the upper revolving structure 101 revolves with respect to the lower traveling structure 102.

At this time, metal abrasion powder 123 is generated in the meshing portion of the gears of the planetary gear speed reduction mechanism 114 and the sliding portions of the other components, and the metal abrasion powder 123 causes the lubricant oil 12 to pass through.
Mix in 4. The metal abrasion powder 123 is the output shaft 1
It gradually descends while rotating around 16 together with the lubricating oil 124. When the metal abrasion powder 123 comes between the upper bearing 118 and the lower bearing 117, it is captured by the tip of the magnetic body 8.

The operation up to this point is the same as the operation in the first embodiment described above.

By pulling out the handle 11 from the guide member 3, the cap 10 and the lid member 13 of the attaching / detaching means are pulled out from the communication passage 2A, and the plate member 6 and the catching means 7 are taken out. At this time, the metal abrasion powder 123 captured by the magnetic body 8 of the capturing means 7 is discharged to the outside of the guide member 3. In addition, the oil amount of the lubricating oil 124 is set to the level gauge plate 30.
Find out by.

Thereafter, the wear particles 123 of metal are removed from the magnetic body 8.
Remove and remove. When the oil level of the lubricating oil 124 is lower than the position L, the lubricating oil 124 is replenished to make the level gauge plate 30 have an appropriate oil level height S (the position of the horizontal line of the level gauge plate 30). When the lubricating oil 124 is dirty, the lubricating oil 124 is replaced.

In the present embodiment, in addition to the effects of the first embodiment described above, the confirmation of the adhesion state of the metal abrasion powder 123, the removal of the metal abrasion powder 123, and the check of the amount of lubricating oil are performed at the same time. be able to.

In this embodiment, the level gauge plate 30 is attached to the plate member 6, but the plate members 6 may be directly provided with marks H, L and S for measuring the oil level. It is possible to obtain various actions and effects.

In the present embodiment, the level gauge plate 30 is attached to the plate member 6 by welding, but the same action and effect can be obtained by attaching it with bolts.

In this embodiment, the plate member 6 is made of metal, but it is made of resin, and the plate member 6 and the level gauge 30, the attaching / detaching means 12, and the catching means 7 are bonded or bolted. May be attached by. In this case, the degree of freedom for bending the plate member 6 increases,
Since the plate-shaped member 6 easily changes along with the path change of the communication passage 2A when the plate-shaped member 6 is attached and detached, it is possible to easily attach and detach the plate-shaped member 6 to and from the communication passage 2A.

In this embodiment, the plate member 6 and the level gauge plate 30 are integrally attached by welding, bolts or adhesion, but they are integrally attached by another attaching method such as caulking. Is also good.

In each of the above-mentioned first, second and third embodiments, the guide member 3 as the guide means is attached to the lower housings 1 and 23, but the communication passage 2A of the guide means is provided. Alternatively, the upper and lower housings may be integrally formed by casting. In this case, since the guide means is formed integrally with the upper and lower housings, the number of parts can be reduced.

Although the guide member 3 is made of metal in the first, second and third embodiments, the guide member having the communication passage 2A is made of resin, and the guide member is used as the lower housing. You may connect to. By inserting the guide member to a position facing the lower housing and arranging the guide member around the capturing means, the guide member can perform the same function as the magnetic shield. Therefore, the number of parts can be reduced and the function of the magnetic shield can be obtained.

Further, in the first, second and third embodiments, the handle 11 of the attaching / detaching means 12 is formed in an annular shape, but the shape of the handle 11 is not limited to that shape, and may be rod-like. Even if the shape is changed to the other shape, the same action and effect can be obtained.

In the first, second and third embodiments, the magnetic body 8 is made to face the inside of the lower housing 1 between the upper bearing 118 and the lower bearing 117. The same action and effect can be obtained even if the magnetic body 8 is arranged above the upper bearing 118 or below the lower bearing 119 in the housing.

Further, in the first, second and third embodiments, the plate member 6 of the connecting means is formed by using the metal spring material, but the connecting means is formed by the wire or the piano wire,
The same action and effect can be obtained even if the shape is changed.

[0094]

The present invention is carried out in the form as described above, and has the following effects.

According to the first aspect of the present invention, the opening of the communication passage of the guide means is located at a position higher than the oil level of the lubricating oil that lubricates the speed reducer, and the magnetism of the trapping means located in the position facing the housing. By taking out the body from the communication passage to the outside of the guide means, it is possible to eliminate the metal abrasion powder in the captured lubricating oil at any appropriate time without discharging the lubricating oil from the turning device.

According to the invention of claim 2, the guide member constituting the guide means is formed in a tubular shape, and the same effect as described in claim 1 can be obtained with a simple structure for attaching it to the housing. You can

According to the invention of claim 3, since the connecting means is a plate-shaped member formed of an elastic member, when the plate-shaped member is inserted into the communication passage, the plate-shaped member is formed along the shape of the communication passage. Since the member is deformed, the plate member can be smoothly attached to the communication passage.

Further, according to the invention of claim 4, since the handle of the attaching / detaching means is provided on the other end side of the plate-like member, the metal abrasion powder can be easily removed to the outside of the housing. .

According to the fifth aspect of the present invention, the capturing means is composed of the magnetic body and the magnetic shield, and the magnetic shield is arranged around the magnetic body, so that the magnetization of the housing around the magnetic body is prevented. be able to.

According to the invention of claim 6, by disposing the auxiliary cover around the magnetic body, when the abrasion powder of the metal captured by the magnetic body is discharged, the abrasion powder of the metal is auxiliary cover together with the magnetic body. Since they are protected by, it is possible to prevent contact between them and the wall portion of the communication passage.

According to the seventh aspect of the present invention, the level gauge plate is attached to the connecting member, so that the amount of lubricating oil in the speed reducer can be checked when the metal abrasion powder is removed from the turning device. be able to.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention and is a cross-sectional side view of a turning device of a construction machine.

FIG. 2 is a partially enlarged cross-sectional view showing an alternate long and short dash line portion A around the capturing means in FIG.

FIG. 3 shows a second embodiment of the present invention and is a partially enlarged cross-sectional view of the periphery of the capturing means corresponding to FIG.

FIG. 4 is a partially enlarged cross-sectional view of the periphery of the capturing means showing the positional relationship between the capturing means and the auxiliary cover when the capturing means in FIG. 3 is taken out of the housing.

FIG. 5 shows a third embodiment of the present invention and is a cross-sectional side view of a turning device of a construction machine.

6 is a partially enlarged sectional view showing a one-dot chain line portion B around the level gauge plate in FIG.

FIG. 7 is a side view showing a general hydraulic excavator provided with a turning device.

8 is a partially enlarged cross-sectional view showing the conventional turning device of FIG.

[Explanation of symbols]

1 Lower housing 2 connecting passages 3 guide members 4 bracket 5 swivel device 6 Plate members 7 Capture means 8 magnetic materials 9 Magnetic shield 10 cap 11 Toride 12 Detaching means 13 Lid member 20 Auxiliary cover 20A tubular part 20B bottom part 21 Stopper 22 holes 23 Lower housing 30 level gauge 102 Upper revolving structure 103 Undercarriage 104 slewing wheel 105 swivel device 110 swing motor 111 Speed reducer 111B reduction gear 112 Upper housing 113 Lower housing 114 Planetary gear reduction mechanism 115 Output shaft of swing motor 116 Planetary gear reduction mechanism output shaft 117 Lower bearing 118 Upper bearing 119 Pinion 122 swivel frame 123 Metal abrasion powder 124 Lubricating oil 128 spaces

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hayato Masuda             Hitachi Construction Machinery Co., Ltd.             Ceremony Company Tsuchiura Factory (72) Inventor Takeshi Kurihara             Hitachi Construction Machinery Co., Ltd.             Ceremony Company Tsuchiura Factory (72) Inventor Akihiro Tanaka             Hitachi Construction Machinery Co., Ltd.             Ceremony Company Tsuchiura Factory (72) Inventor Shinichi Sekido             Hitachi Construction Machinery Co., Ltd.             Ceremony Company Tsuchiura Factory F-term (reference) 2D015 DA02

Claims (7)

[Claims] 1. A swing motor, a speed reducer arranged below the swing motor and connected to an output shaft of the swing motor, and an output shaft of the speed reducer supported in a housing located on the lower side of the speed reducer. A swivel wheel having a bearing, a lubricating oil injected into the housing to lubricate the speed reducer, and a magnetic body disposed in the housing, as a swivel wheel between the base and the swivel body. In the connected swing device of the construction machine, a guide means is provided in the housing, and a communication passage is formed in the guide means, and the communication passage has one side communicating with the housing and the other side of the lubricating oil. A swivel of a construction machine characterized in that it is opened at a position higher than the oil level position, a connecting means is arranged in the communication passage, and a magnetic body arranged in a position facing the housing is attached to the connecting means. apparatus. 2. The guide means is formed by a tubular guide member, the guide member is attached to the outer peripheral portion of the housing in the vicinity of the magnetic body, and one end side of the guide member is attached to the housing. The swivel device for a construction machine according to claim 1, wherein the swivel device is communicated with the communication passage formed in the above, and the other side is opened at a position higher than the oil surface position of the lubricating oil. 3. The connecting means is a plate-shaped member disposed in the communication passage of the guide means and formed of an elastic member, and the magnetic body is attached to one end of the plate-shaped member and the other end thereof. The turning device for a construction machine according to claim 1, wherein the side is located on the opening side of the guide member. 4. The turning device for a construction machine according to claim 3, wherein a handle is provided on the other end side of the plate-shaped member. 5. The turning device for a construction machine according to claim 1, wherein a magnetic shield is arranged on a portion of the magnetic body facing the communication passage. 6. An auxiliary cover is arranged around the magnetic body in the communication passage, and when the magnetic body is taken out of the guide means, the auxiliary cover protects the tip of the magnetic body. The swivel device for a construction machine according to claim 1, wherein: 7. The turning of a construction machine according to claim 1, wherein a level gauge is provided on the plate-shaped member in the communication passage at a position corresponding to an oil surface height of the lubricating oil. apparatus.