JP2551895Y2 - Mounting structure of upper revolving superstructure for construction machinery - Google Patents
Mounting structure of upper revolving superstructure for construction machineryInfo
- Publication number
- JP2551895Y2 JP2551895Y2 JP5557793U JP5557793U JP2551895Y2 JP 2551895 Y2 JP2551895 Y2 JP 2551895Y2 JP 5557793 U JP5557793 U JP 5557793U JP 5557793 U JP5557793 U JP 5557793U JP 2551895 Y2 JP2551895 Y2 JP 2551895Y2
- Authority
- JP
- Japan
- Prior art keywords
- bolt
- upper revolving
- mounting structure
- hole
- construction machinery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Component Parts Of Construction Machinery (AREA)
- Jib Cranes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は建設機械の上部旋回体の
取付構造に関るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting an upper rotating body of a construction machine.
【０００２】[0002]
【従来の技術】建設機械における上部旋回体１と旋回輪
２（図２）との取付時に於ける加工誤差による特付困難
を防止するため、従来の取付方法ではボルト８（図３）
の外径に対して貫通孔径を大きくしていた。このため、
取付位置にバラツキが生じた。例えば貫通孔径２２mmに
対しボルト外径２０mmを使用しボ−ルレ−ス６の取付部
にインロ−で位置出ししている。このため旋回モ−タ７
のピニオンとベアリングの歯部の距離に影響が出て旋回
時に異音が発生したり、旋回バックラッシの増加という
不具合が発生している。2. Description of the Related Art In order to prevent a difficulty in specializing due to a machining error when mounting an upper revolving structure 1 and a revolving wheel 2 (FIG. 2) in a construction machine, a bolt 8 (FIG. 3) is used in a conventional mounting method.
Had a larger through-hole diameter than the outer diameter of. For this reason,
Variations occurred in the mounting position. For example, a bolt outer diameter of 20 mm is used for a through-hole diameter of 22 mm, and the bolt hole 6 is positioned at the mounting portion of the ball race 6 with an inlay. Therefore, the turning motor 7
The influence of the distance between the pinion and the tooth portion of the bearing occurs, and abnormal noise is generated during turning, and turning backlash increases.
【０００３】[0003]
【考案が解決しようとする課題】本考案は旋回モ−タ側
のピニオンが噛み合う相手ギアとの噛合部の１部のみズ
レ量を小さくし、容易かつ安価に適正なバックラッシを
確保するようにすることを目的とする。SUMMARY OF THE INVENTION According to the present invention, only a part of a meshing portion with a mating gear with which a pinion on the turning motor meshes with a counterpart gear is reduced in amount so that proper backlash can be easily and inexpensively secured. The purpose is to:
【０００４】[0004]
【課題を解決するための手段】上部旋回体１と旋回輪２
との結合部に於いて、上部旋回体１に設けたねじ孔３と
旋回輪２に設けたボルト４の貫通孔５のズレ量を、ねじ
部4a外の円筒部4bの径を太くした特殊ボルト４を使用す
ることにより相手歯車との噛合部の１部のみを小さくし
た。The revolving superstructure 1 and the revolving wheel 2 are provided.
In the joint portion between the screw portion 4a and the through hole 5 of the bolt 4 provided in the revolving wheel 2, the amount of deviation between the screw hole 3 provided in the upper rotating body 1 and the diameter of the cylindrical portion 4b outside the screw portion 4a is increased. By using the bolt 4, only one part of the meshing portion with the mating gear is reduced.
【０００５】[0005]
【実施例】図１に本考案に関る特殊ボルト４を示す。通
常、標準六角ボルトのねじ部外の円筒部4bの外径はねじ
部4aの有効径あるいは呼び径と同等である。しかし本考
案の特殊ボルト４はねじ部外の円筒部4bをねじ部4aより
太くし、これに位置合せピンの役割を兼ねさせた点を特
徴としている。たとえば図３でボ−ルレ−ス６と旋回モ
−タ７の中心間距離Ａの加工公差は＋０.１〜０mmであ
る。ボ−ルレ−ス取付用のボルト８の径２０mm、ボ−ル
レ−ス取付穴の径２２mmを考慮すると、中心間距離Ａの
取付誤差は＋１.１〜−１mmとなる。ところが、本考案
の特殊ボルト４を使用すると、取付誤差は＋０.２５〜
−０.１５と減少させることができる。1 shows a special bolt 4 according to the present invention. Normally, the outer diameter of the cylindrical portion 4b outside the thread of the standard hexagon bolt is equal to the effective diameter or the nominal diameter of the thread 4a. However, the special bolt 4 of the present invention is characterized in that the cylindrical portion 4b outside the threaded portion is made thicker than the threaded portion 4a, and also serves as a positioning pin. For example, in FIG. 3, the machining tolerance of the center distance A between the ball race 6 and the turning motor 7 is +0.1 to 0 mm. Taking into account the diameter of the ball race mounting bolt 8 of 20 mm and the diameter of the ball race mounting hole of 22 mm, the mounting error of the center-to-center distance A is +1.1 to -1 mm. However, when the special bolt 4 of the present invention is used, the mounting error is from +0.25 to
It can be reduced to -0.15.
【０００６】[0006]
【効果】上部旋回体１と旋回輪２との結合部に於いて、
上部旋回体１に設けたねじ孔３と旋回輪２に設けた特殊
ボルト４の貫通孔５のズレ量を相手歯車との噛合い部の
１部のみ小さくした。このように旋回モ−タのピニオン
が噛み合う相手歯車との噛合部の１部のみズレ量を小さ
くすることにより、容易かつ安価に適正なバックラッシ
を確保することが可能となった。[Effect] At the joint between the upper revolving superstructure 1 and the revolving wheel 2,
The amount of deviation between the screw hole 3 provided in the upper revolving unit 1 and the through hole 5 of the special bolt 4 provided in the revolving wheel 2 is reduced only in one portion of the meshing portion with the mating gear. In this way, by reducing the amount of displacement of only one of the meshing portions of the turning motor and the mating gear with which the pinion meshes, it is possible to easily and inexpensively secure an appropriate backlash.
【図１】本考案に関る特殊ボルト。FIG. 1 shows a special bolt according to the present invention.
【図２】上部旋回体と旋回輪との結合部断面図。FIG. 2 is a cross-sectional view of a coupling portion between an upper rotating body and a rotating wheel.
【図３】ボ−ルレ−スと旋回モ−タと噛合部の平面図。FIG. 3 is a plan view of a ball race, a turning motor, and a meshing portion.
１ 上部旋回体 ２ 旋回輪 ３ ねじ孔 ４ 特殊ボルト 4a ねじ部 4b 円筒部 ５ 貫通孔 ６ ボ−ルレ−ス ７ 旋回モ−タ ８ ボルト DESCRIPTION OF SYMBOLS 1 Upper revolving body 2 Slewing wheel 3 Screw hole 4 Special bolt 4a Screw part 4b Cylindrical part 5 Through hole 6 Ball race 7 Slewing motor 8 Bolt
Claims (1)
に於いて、上部旋回体(１)に設けたねじ孔(３)と旋回輪
(２)に設けたボルト(４)の貫通孔(５)のズレ量を、ねじ
部(4a)外の円筒部(4b)の径を太くした特殊ボルト(４)を
使用することにより相手歯車との噛合部の１部のみを小
さくしたことを特徴とする建設機械の上部旋回体の取付
構造。1. A screw hole (3) provided in an upper revolving unit (1) and a revolving wheel at a joint between the upper revolving unit (1) and a revolving wheel (2).
The amount of displacement of the through hole (5) of the bolt (4) provided in (2) can be reduced by using a special bolt (4) with a larger diameter of the cylindrical portion (4b) outside the screw portion (4a). Characterized in that only one portion of the meshing portion with the above is reduced in size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5557793U JP2551895Y2 (en) | 1993-10-14 | 1993-10-14 | Mounting structure of upper revolving superstructure for construction machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5557793U JP2551895Y2 (en) | 1993-10-14 | 1993-10-14 | Mounting structure of upper revolving superstructure for construction machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0724878U JPH0724878U (en) | 1995-05-12 |
| JP2551895Y2 true JP2551895Y2 (en) | 1997-10-27 |
Family
ID=13002595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5557793U Expired - Lifetime JP2551895Y2 (en) | 1993-10-14 | 1993-10-14 | Mounting structure of upper revolving superstructure for construction machinery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2551895Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3981339B2 (en) * | 2003-04-04 | 2007-09-26 | 日立建機株式会社 | Construction machinery swivel mechanism |
-
1993
- 1993-10-14 JP JP5557793U patent/JP2551895Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0724878U (en) | 1995-05-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |