JP3430203B2 - Revolving structure mounting structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a revolving structure provided on a construction machine such as a hydraulic excavator and having a revolving device having a revolving pinion that meshes with a ring gear of an inner ring of the revolving wheel.

[0002]

2. Description of the Related Art FIG. 3 is a plan view schematically showing the structure of a conventional revolving structure mounting structure, and FIG. 4 is a cross-sectional view of the principal part viewed from the direction B in FIG. This conventional revolving structure attachment structure is provided, for example, in a hydraulic excavator.

In FIG. 4, reference numeral 1 denotes a running body equipped with a crawler belt (not shown), 2 denotes a turning wheel, which has an inner wheel 3 and an outer wheel 4. Reference numeral 5 is a main frame of the revolving structure which is arranged on the traveling structure 1 via the revolving wheel 2.

A turning device 7 having a turning pinion 6 is arranged on the main frame 5. In the swivel device 7, the protrusion 8 has a pilot hole 9 in the main frame 5.
After being placed on the main frame 5 so as to be fitted into the main frame 5, it is attached to the main frame 5 with bolts 10. The bolt 10 is a hole 1 formed in the turning device 7.
Screw hole 1 formed in main frame 5
It is screwed to 2. As illustrated in FIG. 3, the bolt 1
A plurality of combinations of 0, holes 11, and screw holes 12 are provided.

As shown in FIG. 4, the outer ring 4 of the revolving wheel 2 is attached to the main frame 5 of the revolving structure by bolts 13. The bolt 13 has a hole 14 formed in the outer ring 4.
Screw holes 15 inserted in the main frame 5
It is screwed to. As illustrated in FIG. 3, the bolt 1
A plurality of combinations of 3, the holes 14, and the screw holes 15 are also provided.

Further, as shown in FIG. 4, the inner ring 3 of the slewing wheel 2 is
Are attached to the traveling body 1 by bolts 16. Further, as shown in FIG. 3, the above-described turning device 7 is arranged so that the ring gear 17 of the inner wheel 3 of the turning wheel 2 and the turning pinion 6 of the turning device 7 mesh with each other. In FIGS. 3 and 4, O1 is the center of the turning wheel and O2 is the center of the turning device.

[0007]

Now, for example, assume that the inner ring 3 of the revolving wheel 2 is fixed to the traveling body 1 by the bolt 16 and the outer ring 4 is fixed to the main frame 5 of the revolving body by the bolt 13. It is assumed that a work of mounting the turning device 7 on the main frame 5 and fixing the turning device 7 to the main frame 5 with a plurality of bolts 10 is performed.

If, for example, the diameter of the hole 11 formed in the swivel device 7 is 18 mm and the diameter of the bolt 10 inserted in this hole 11 is 16 mm, the bolt 10 is vacated. When inserted in 11, the hole 11 has a maximum radial gap of 1 with respect to the direction along the center connecting line 18 connecting the turning wheel center O1 and the turning device center O2 shown in FIG.
mm. That is, assuming that the reference position is when the bolt 10 is inserted into the hole 11 so that the center of the hole 11 and the center of the bolt 10 coincide with each other, a maximum of 1 m from the reference position.
In the range of m, as shown by the arrow 19 in FIG.
Is attached in a direction approaching the turning wheel center O1, or conversely, the turning device 7 is attached in a direction moving away from the turning wheel center O1.

Therefore, in the prior art, when a plurality of the hydraulic excavators are assembled, the turning devices 7 of the respective excavators are assembled.
Of the turning pinion 6 and the ring gear 10 of the inner ring 3 of the turning wheel 2
There is a problem that the backlash formed in the meshing portion with the V is large and the quality accuracy of the hydraulic excavator is likely to deteriorate.

Further, in particular, when the backlash of the meshing portion between the swiveling pinion 6 and the ring gear 17 increases, a swing width of several tens of mm in the swiveling direction occurs at the bucket blade edge, and the bucket is positioned at a predetermined position by the swiveling operation. Work becomes difficult and workability deteriorates.

Further, for example, when the outer ring 4 of the turning wheel 2 is attached to the main frame 5 with the bolts 13, there are the same problems as described above.

That is, assuming that the diameter of the hole 14 formed in the outer ring 4 of the turning wheel 2 is 18 mm and the diameter of the bolt 13 inserted into the hole 14 is 16 mm, the bolt 13 is When inserted into the hole 14, the maximum radial gap of the hole 14 is 1 mm with respect to the direction along the center connecting line 18 connecting the turning wheel center O1 and the turning device center O2 shown in FIG. Accordingly, the turning device 7 described above
When a plurality of hydraulic excavators are assembled, the turning pinion 6 of each turning device 7 is mounted as in the case of mounting
As a result, the variation in backlash formed in the meshing portion with the ring gear 17 of the inner ring 3 that is provided continuously with the outer ring 4 of the slewing wheel 2 increases. Therefore, as in the case of mounting the swing device 7 described above, there is a problem that the quality accuracy of the hydraulic excavator is likely to deteriorate, and when the backlash is large, the workability such as the work of positioning the bucket by the swing operation deteriorates. Invite.

The present invention has been made in view of the above-mentioned actual situation in the prior art, and an object thereof is to reduce variations in backlash at a meshing portion between a turning pinion of a turning device and a ring gear of an inner ring of a turning wheel. An object of the present invention is to provide a mounting structure for a revolving structure that can be used.

[0014]

In order to achieve the above-mentioned object, the invention according to claim 1 of the present application is a turning body arranged on the running body via a running body and a turning wheel having an inner ring and an outer ring. Provided in a construction machine having a body, on the main frame of the revolving structure, a revolving device having a revolving pinion is mounted by bolts, and the outer ring of the revolving wheel is mounted by bolts on the main frame of the revolving structure, In the mounting structure of the revolving unit, the inner ring of the revolving wheel is attached to the traveling body with a bolt, and the revolving device is arranged so that the revolving pinion meshes with the ring gear of the inner ring of the revolving wheel. At least one of the turning device pins connected to the main frame and the one turning wheel pin connecting the outer ring of the turning wheel to the main frame Also, one of them is provided, and at least one of the pin for the turning device and the pin for the turning wheel is arranged on the center connecting line connecting the center of the turning wheel and the center of the turning device or in the vicinity of the center connecting line. It has been configured.

In the invention according to claim 1 configured as described above, for example, when only one turning device pin is provided,
When mounting the swivel device on the main frame of the swivel body, insert a bolt while appropriately swiveling the swivel device substantially in a horizontal plane around the swivel device pin provided so as to connect the swivel device to the main frame. However, at this time, since the position of the turning device pin is on or near the center connecting line connecting the turning wheel center and the turning device center, the turning device center associated with the turning of the turning device is For example, the displacement along the center connecting line is 0.2m
It can be made extremely small as m or less. That is, it is possible to restrict the movement of the turning device in the direction along the center connecting line, and thereby reduce the backlash variation in the meshing portion between the turning pinion of the turning device and the ring gear of the inner ring of the turning wheel.

Further, for example, when only one turning wheel pin is provided, when the outer wheel of the turning wheel is attached to the main frame of the turning body, the turning wheel pin is provided so as to connect the outer wheel to the main frame. At the center, a bolt will be inserted while appropriately rotating the outer ring of the slewing wheel in a substantially horizontal plane.At this time, the position of the slewing wheel pin is on the center connecting line connecting the slewing wheel center and the slewing device center, Alternatively, since it is near the center connecting line, the displacement amount in the direction along the center connecting line at the center of the turning wheel due to the rotation of the outer wheel of the turning wheel can be made extremely small, for example, 0.2 mm or less. That is, the movement of the turning wheel in the direction along the center connecting line of the outer wheel can be restricted, and accordingly, the movement of the inner wheel that is connected to the outer wheel can be restricted. It is possible to reduce variations in backlash at the meshing portion of the inner ring with the ring gear.

Further, for example, in the case where one turning device pin and one turning wheel pin are provided together, the combined action of the above-mentioned cases can be obtained, whereby the turning pinion of the turning device can be obtained. It is possible to further reduce variations in backlash at the meshing portion with the ring gear of the inner ring of the slewing wheel.

In order to achieve the above object, the invention according to claim 2 of the present application is the same as the invention according to claim 1,
The corresponding swivel device pin is arranged such that the angle formed by the line connecting the swivel device center and the swivel device pin center and the center connecting line is approximately 30 ° or less, and the corresponding swivel device is rotated. The wheel pin is arranged such that the angle formed by the line connecting the center of the turning wheel and the center of the turning wheel pin and the center connecting line is approximately 30 ° or less.

In order to achieve the above object, the invention according to claim 3 of the present application is the invention according to claim 1 or 2, wherein a swivel device pin hole into which the swivel device pin is inserted is provided. , Arranging the swivel device on a pitch circle of a plurality of bolts for mounting the swivel wheel to the main frame, and a pin hole for a swivel wheel into which the corresponding swivel wheel pin is inserted, and the outer ring of the swivel wheel to the main frame. The bolts are mounted on the pitch circle of the bolts.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a structure for mounting a revolving structure of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view schematically showing the configuration of an embodiment of a revolving structure attachment structure according to the present invention, and FIG. 2 is a cross-sectional view of a main part viewed from the direction A in FIG.
This embodiment is also provided in a hydraulic excavator, for example.

The basic configuration of this embodiment is also the same as that shown in FIGS. That is, FIG.
As shown in FIG. 2, the main frame 5 of the revolving structure is arranged on the traveling structure not shown here via the revolving wheel 2. The slewing wheel 2 has an inner ring and an outer ring 4 which are not shown here, and a ring gear 17 is formed on the inner ring as illustrated in FIG.

A swing pinion 6 is mounted on the main frame 5.
Is disposed on the main frame 5 by a plurality of bolts 10. Further, as shown in FIG. 2, the outer ring 4 of the turning wheel 2 is attached to the main frame 5 by a plurality of bolts 13. Although not shown in FIGS. 1 and 2, the inner ring of the turning wheel 2 is attached to the traveling body by bolts.

Then, as illustrated in FIG. 1, the turning wheel 2
Inner ring ring gear 17 and turning pinion 6 of turning device 7
The above-described turning device 7 is arranged so that and engage with each other. In FIGS. 1 and 2, O1 is the center of the turning wheel, O2 is the center of the turning device, and 18 is a center connecting line connecting the center O1 of the turning wheel and the center O2 of the turning device. The above configuration is equivalent to that shown in FIGS.

In the present embodiment, in particular, one turning device pin 2 for connecting the turning device 7 to the main frame 5 of the turning body.
0 and at least one of the one turning wheel pin 21 that connects the outer wheel 4 of the turning wheel 2 to the main frame 5, for example, both the turning device pin 20 and the turning wheel pin 21 are provided. .

The swivel device pin hole 22 into which the swivel device pin 20 is inserted is arranged on a pitch circle 23 of a plurality of bolts 10 for mounting the swivel device 7 on the main frame 5, as illustrated in FIG. . Also, this swivel device pin 2
0 is provided on the center connecting line 18 connecting the turning wheel center O1 and the turning device center O2, or at a position near the center connecting line 18. For example, in a region between the turning wheel center O1 and the turning device center O2, and moreover, the turning device center O
It is arranged so that an angle α formed by the center connecting line 18 and the line 24 connecting the 2 and the swivel device pin center m is approximately 30 ° or less.

As shown in FIG. 2, the main frame 5 is also provided with a turning device pin hole 25 into which the turning device pin 20 is inserted.

The slewing wheel pin hole 26 into which the slewing wheel pin 21 is inserted also has an outer ring 4 of the slewing wheel 2 as illustrated in FIG.
Are arranged on a pitch circle 32 of a plurality of bolts 13 attached to the main frame 5. The slewing wheel pin 20 is provided on the center connecting line 18 or the center connecting line 1
It is provided in the vicinity of 4. For example, a line 27 connecting the turning wheel center O1 and the turning wheel pin center n and the center connecting line 18
The angle β formed by and is set to be approximately 30 ° or less.

As shown in FIG. 2, the main frame 5 is also provided with a turning wheel pin hole 28 into which the turning wheel pin 21 is inserted.

In the present embodiment having such a configuration, the revolving structure is attached as follows.
First, the running body and the turning wheels 3 which are not shown in FIGS.
Bolt the inner ring of. Next, the main frame 5 is lowered from above, and the slewing wheel pin 21 attached to the outer ring 4 of the slewing wheel 2 is inserted into the slewing wheel pin hole 28 formed in the main frame 5, and the bolt is arranged. The outer ring 4 of the turning wheel 2 is attached to the main frame 5 by 13. After that, for example, the turning device pin 20 is inserted in a state where the turning device pin hole 22 formed in the turning device 7 and the turning device pin hole 25 formed in the main frame 5 are fitted, and turning is performed by the bolt 10. Attach the device 7 to the mainframe 5. In this way, the turning wheel 2 and the turning device 7 can be incorporated in the main frame 5 of the turning body so that the turning pinion 6 of the turning device 7 and the ring gear 17 of the inner wheel of the turning wheel 2 mesh with each other.

In this embodiment having the above-described structure, when the outer ring 4 of the swivel wheel 2 is attached to the main frame 5 of the swivel body, the outer ring 4 of the swivel wheel 2 is appropriately centered on the swivel wheel pin 21 in a substantially horizontal plane. The bolt 13 is inserted while rotating, but at this time, the position of the turning wheel pin 13 is
For example, since it is in the vicinity of the center connecting line 18, the center connecting line 18 of the turning wheel center O1 associated with the rotation of the outer ring 4 is shown in FIG.
The amount of displacement in the direction of the arrow 29 is extremely small, and therefore, the outer ring 4 of the slewing ring 2 in the direction along the center connecting line 18 is
The movement of the inner ring continuously provided with the outer ring 4, that is, the movement of the inner ring gear 17 in the direction along the center connecting line 18 can be restricted.

When the turning device 7 is attached to the main frame 5 of the turning body, the bolt 10 is inserted while turning the turning device 7 about the turning device pin 20 in a substantially horizontal plane. At this time, the position of the swivel device pin 20 is, for example, in the vicinity of the center connecting line 18, so that displacement of the swivel device center O2 along the center connecting line 18 in the direction of the arrow 29 in FIG. The amount is very small, so that the movement of the swivel device 7 in the direction along the center connecting line 18, that is, the movement of the turning pinion 6 in the direction along the center connecting line 18 can be restricted.

As described above, in this embodiment, when the outer ring 4 of the swivel wheel 2 is attached to the main frame 5 with the bolts 13, the movement of the ring gear 17 in the direction along the center connecting line 18 can be restricted, and the main frame 5 When the swivel device 7 is attached to the swivel device 7 with the bolts 10, the movement of the swivel pinion 6 in the direction along the center connecting line 18 can be restricted. With these, the swivel pinion 6 of the swivel device 7 and the ring gear 1 of the inner ring 1
It is possible to reduce variations in backlash at the meshing portion with 7, and to reduce assembly error between the hydraulic excavators when assembling a plurality of the hydraulic excavators, thereby improving the quality accuracy of the hydraulic excavators. Further, since the backlash can be managed so as not to be excessive by the above-described turning device pin 20 and turning wheel pin 21, for example, the bucket can be accurately positioned during turning operation, which is excellent. Workability can be obtained.

In addition, one turning device pin 20 and corresponding turning device pin holes 22 and 25 and turning wheel pin 2 are provided.
Since the configuration is simple, only one is provided and the corresponding slewing wheel pin holes 26 and 28 are provided, so that the manufacturing cost can be reduced.

In the above embodiment, the turning device pin 20 and the turning wheel pin 21 are provided at positions deviated from the center connecting line 18, but when the arrangement space is large, these turning device pins are used. Pin 20, swivel pin 21
Is conveniently provided on the central connecting line 18. With this structure, when the turning device 7 or the outer wheel 4 of the turning wheel 2 is attached to the main frame 5 of the turning body,
The displacement amount in the direction of arrow 29 in FIG. 1 along the center connecting line 18 of the turning device center O2 accompanying the turning of the turning device 7, or the turning wheel center O1 accompanying the turning of the outer wheel 4 of the turning wheel 2.
The amount of displacement in the direction of the arrow 29 in FIG. 1 along the center connecting line 18 of FIG.
The movement of the ring gear 17 in the direction along the center connecting line 18 or the movement of the ring gear 17 in the direction along the center connecting line 18 can be further restricted.

Further, in the above embodiment, as shown in FIG. 1, the turning device pin 20 is provided in the region between the turning wheel center O1 and the turning device center O2, but the present invention is as described above. The configuration is not limited, and as illustrated in FIG. 1, the turning device pin 30 provided in place of the turning device pin 20 is provided in the region between the turning wheel center O1 and the turning device center O2. Alternatively, it may be arranged in an area located outside. In this case, the swivel device pin 30 is provided so that the angle γ formed by the line 31 connecting the swivel device center O2 and the center of the swivel device pin 30 and the center connecting line 18 is approximately 30 ° or less. , The swivel device pin 30
Is conveniently arranged on the pitch circle 23 of the plurality of bolts 10. Even in the case of such a configuration, it is possible to obtain the same operational effects as those of the above-described embodiment.

Further, in the above embodiment, both the turning device pin 20 and the turning wheel pin 21 are provided, but the present invention is not limited to such a configuration, and for example, the turning device pin 20 is provided. Only one of them may be provided, or only one of the turning wheel pins 21 may be provided.

In the structure in which only one turning device pin 20 is provided, the positioning accuracy of the turning pinion 6 of the turning device 7 is improved, and the meshing portion between the turning pinion 6 and the ring gear 17 of the inner ring of the turning wheel 2 is improved. The backlash variation can be reduced, the quality accuracy of the hydraulic excavator can be increased accordingly, and the positioning accuracy of the bucket and the like at the time of turning operation is improved, resulting in excellent workability. Also, the structure is simpler,
The production cost is low.

Further, in the structure in which only one slewing wheel pin 21 is provided, the positioning accuracy of the outer ring 4 of the slewing wheel 2 is improved, so that the ring gear 17 of the inner ring connected to the outer ring 4 is improved.
The positioning accuracy of the hydraulic excavator can be improved, and from this point of view, backlash at the meshing portion between the turning pinion 6 and the ring gear 17 can be reduced, and the quality accuracy of the hydraulic excavator can be improved in the same manner as described above. The positioning accuracy of the bucket and the like is improved, and excellent workability is obtained. Also, the structure is simple and the manufacturing cost is low.

[0039]

As described above, according to the inventions according to each of the claims of the present application, it is possible to reduce the variation in the backlash at the meshing portion between the turning pinion of the turning device and the ring gear of the inner ring of the turning wheel. It is possible to improve the quality accuracy of the construction machine equipped with the revolving structure as compared with the conventional one. Further, when the turning operation is performed, the positioning accuracy of the working machine that operates integrally with the turning body can be increased, and workability superior to that of the related art can be obtained. Furthermore, since it has a simple structure in which at least one of the turning device pin and the one turning wheel pin and the corresponding pin hole are provided, the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view schematically showing a configuration of an embodiment of a revolving structure attachment structure of the present invention.

FIG. 2 is a cross-sectional view of main parts as seen from the direction A in FIG.

FIG. 3 is a plan view schematically showing a configuration of a conventional revolving structure attachment structure.

FIG. 4 is a cross-sectional view of essential parts viewed from the direction B in FIG.

[Explanation of symbols]

2 slewing wheels 4 outer ring 5 mainframe 6 turning pinion 7 swivel device 10 volts 13 volt 17 ring gear 18 center connection line 20 Pin for swivel device 21 Swivel pin 22 Pin hole for swivel device 23 pitch circles 24 lines 25 Pin hole for swivel device 26 Pin hole for slewing wheel 27 lines 28 Pin hole for slewing wheel 30 Swing device pin 31 line 32 pitch circle 01 Center of turning wheel 02 Center of turning device m Swing device pin center n Swivel wheel pin center

Front page continuation (72) Inventor Shigeto Takahashi, 650 Jinrachi-cho, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd. Tsuchiura Plant (56) References: Kaikaihei 7-24878 (JP, U) Sankaihei 4-37655 ( JP, U) Actually open 5-87049 (JP, U) Actually open 63-165350 (JP, U) Actually open 62-156661 (JP, U) Actually open 49-134802 (JP, U) (58 ) Fields surveyed (Int.Cl. ⁷ , DB name) E02F 9/12

Claims (3)

(57) [Claims] 1. A construction machine equipped with a traveling body and a revolving body arranged on the traveling body via a revolving wheel having an inner wheel and an outer wheel, the revolving pinion being provided on a main frame of the revolving body. A swivel device having a bolt, the outer wheel of the swivel wheel is bolted to the main frame of the swivel body, the traveling body is bolted to the inner ring of the swivel wheel, and the swivel device is In a mounting structure of a revolving structure arranged such that the revolving pinion meshes with a ring gear of an inner wheel of the revolving wheel, one revolving device pin connecting the revolving device to the main frame, and the outer wheel of the revolving wheel are provided. At least one of the one turning wheel pin connected to the main frame is provided, and the corresponding turning device pin and turning wheel pin At least one of them is arranged on a center connecting line connecting the center of the turning wheel and the center of the turning device, or in the vicinity of the center connecting line. 2. The corresponding swivel device pin is arranged such that an angle between a line connecting the swivel device center and the swivel device pin center and the center connecting line is approximately 30 ° or less. The corresponding slewing wheel pin is arranged such that an angle formed by a line connecting the slewing wheel center and the slewing wheel pin center and the center connecting line is approximately 30 ° or less. The structure for mounting a revolving structure according to claim 1. 3. A slewing device pin hole into which the corresponding slewing device pin is inserted is arranged on a pitch circle of a plurality of bolts for mounting the slewing device to the main frame, and the corresponding slewing wheel pin is provided. The structure for mounting a revolving structure according to claim 1 or 2, wherein the pin hole for the revolving wheel into which is inserted is arranged on a pitch circle of a plurality of bolts for mounting the outer ring of the revolving wheel to the main frame. .