JP2749781B2 - Turning position detector for construction machinery - Google Patents
Turning position detector for construction machineryInfo
- Publication number
- JP2749781B2 JP2749781B2 JP24041694A JP24041694A JP2749781B2 JP 2749781 B2 JP2749781 B2 JP 2749781B2 JP 24041694 A JP24041694 A JP 24041694A JP 24041694 A JP24041694 A JP 24041694A JP 2749781 B2 JP2749781 B2 JP 2749781B2
- Authority
- JP
- Japan
- Prior art keywords
- region
- cam
- outer diameter
- rotary joint
- upper revolving
- 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
- Transmission And Conversion Of Sensor Element Output (AREA)
- Mechanisms For Operating Contacts (AREA)
- Component Parts Of Construction Machinery (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、油圧ショベル等の建設
機械の旋回位置検出装置に関するものであり、特に、上
部旋回体と下部走行体との相対位置を判定する旋回位置
検出装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning position detecting device for a construction machine such as a hydraulic excavator, and more particularly to a turning position detecting device for determining a relative position between an upper revolving unit and a lower traveling unit. is there.
【０００２】[0002]
【従来の技術】従来此種建設機械においては、上部旋回
体が下部走行体に対して旋回自在になるように形成され
ている。従って、オペレータが上部旋回体に設けられて
いる操縦席に座り、上部旋回体を旋回させながら作業を
行っている場合、上部旋回体の下部走行体に対する相対
位置を見失うおそれがあり、機体の進行方向の判断を誤
って事故を招く危険がある。2. Description of the Related Art Conventionally, in a construction machine of this type, an upper swing body is formed so as to be swingable with respect to a lower traveling body. Therefore, when the operator is sitting on the cockpit provided on the upper revolving structure and performing the work while revolving the upper revolving structure, there is a risk that the relative position of the upper revolving structure with respect to the lower traveling structure may be lost, and the progress of the aircraft may be lost. There is a danger of misjudging the direction and causing an accident.
【０００３】そこで、このような走行誤操作を防止する
ためにロータリージョイントにポテンショメータを組み
込み、上部旋回体の回転角度を検出することにより操縦
席内に走行モータの位置を表示して、オペレータに上部
旋回体の下部走行体に対する相対位置を認識させる手段
が知られている。Therefore, in order to prevent such erroneous running operation, a potentiometer is incorporated in the rotary joint, the position of the running motor is displayed in the cockpit by detecting the rotation angle of the upper swing body, and the upper swing is displayed to the operator. Means for recognizing the relative position of the body with respect to the undercarriage are known.
【０００４】[0004]
【発明が解決しようとする課題】従来の旋回位置検出装
置は、前述した如く、ロータリージョイントにポテンシ
ョメータを組み込むものであるため、大幅なコストアッ
プにつながるだけでなく、組立作業も容易でない。ま
た、装置の耐久性にも問題がある。As described above, since the conventional turning position detecting device incorporates a potentiometer in a rotary joint, it not only leads to a significant increase in cost, but also makes assembly work difficult. There is also a problem in the durability of the device.
【０００５】そこで、旋回位置検出装置をより簡易な構
成にしてコストダウンを図るとともに、装置の耐久性を
向上させるために解決せらるべき技術的課題が生じてく
るのであり、本発明は該課題を解決することを目的とす
る。[0005] In view of the above, the turning position detecting device has a simpler structure to reduce the cost, and technical problems to be solved in order to improve the durability of the device arise. The purpose is to solve.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記目的を達
成するために提案せられたものであり、下部走行体にロ
ータリージョイントを介して上部旋回体を載設した建設
機械において、上部旋回体に固設されて回動するロータ
リージョイントロータの外周に沿って該ロータリージョ
イントロータを囲繞する中空円筒状のカムを下部走行体
に固設し、且つ、該カムの上段および下段は夫々前向領
域、後向領域、左向領域、右向領域のいずれか二領域ご
とに外径が異なるように形成され、且つ、該カムの下段
は、上段の外径が大きい二領域のうちの一領域のみの外
径が小さく形成されるとともに、上段の外径が小さい二
領域のうちの一領域のみの外径が大きく形成され、更
に、前記ロータリージョイントロータ近傍の上部旋回体
に二個の位置センサを固設するとともに、該二個の位置
センサを夫々前記カムの上段側面および下段側面に沿っ
て移動させて、該二個の位置センサを相互にON、0FF さ
せることにより上部旋回体の旋回位置を判定する建設機
械の旋回位置検出装置を提供するものである。SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above object, and is intended for a construction machine in which an upper revolving unit is mounted on a lower traveling unit via a rotary joint. A hollow cylindrical cam surrounding the rotary joint rotor is fixedly mounted on the lower traveling body along the outer circumference of the rotary joint rotor which is fixed to the body and rotates, and the upper and lower stages of the cam are respectively directed forward. The outer diameter is different for each of the two regions of the region, the rearward region, the leftward region, and the rightward region, and the lower part of the cam is one of the two regions having the larger outer diameter of the upper part. The outer diameter of only one of the two regions where the outer diameter of the upper stage is smaller is formed larger, and the outer diameter of only one of the two regions is smaller. In addition to being fixed, the two position sensors are moved along the upper side surface and the lower side surface of the cam, respectively, so that the two position sensors are turned on and off, thereby turning the turning position of the upper turning body. An object of the present invention is to provide a construction machine turning position detection device for determining.
【０００７】[0007]
【作用】上部旋回体を旋回させると、二個の位置センサ
が夫々中空円筒状のカムの上段側面および下段側面に沿
って移動し、該カムの外径の大小によって該二個の位置
センサは夫々ON，0FF する。When the upper revolving unit is swung, the two position sensors move along the upper side surface and the lower side surface of the hollow cylindrical cam, respectively. Turn ON and 0FF respectively.
【０００８】而して、カムの上段と下段との外径の大き
さは四領域ごとに大と大、大と小、小と大、小と小の四
種類に組み合わされているので、前記二個の位置センサ
は四領域ごとにONとON、ONと0FF 、0FF とON、0FF と0F
F の四種類のスイッチング状態を形成する。The outer diameters of the upper and lower cams are combined into four types, large and large, large and small, small and large, and small and small, for each of the four regions. Two position sensors are ON and ON, ON and 0FF, 0FF and ON, 0FF and 0F for every four areas
Four switching states of F are formed.
【０００９】斯くして、該スイッチング状態により、上
部旋回体が前向領域、後向領域、左向領域または右向領
域のいずれの領域に位置しているかを判定することがで
きる。Thus, it is possible to determine from the switching state whether the upper revolving superstructure is located in the forward region, the backward region, the leftward region or the rightward region.
【００１０】[0010]
【実施例】以下、本発明の一実施例を図１乃至図８に従
って詳述する。図１において、１は中空円筒状カムであ
り、ロータリージョイントロータ２を囲繞しながらロー
タリージョイントハウジング３を介して下部走行体４に
固設されている。そして、該カム１の外径は図３および
図４に図示せる如く、前向領域ａにおいて上段、下段と
もに小、後向領域ｂにおいて上段、下段ともに大、左向
領域ｃにおい上段が大、下段が小、そして右向領域ｄに
おいて上段が小、下段が大に形成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. In FIG. 1, reference numeral 1 denotes a hollow cylindrical cam, which is fixed to a lower traveling body 4 via a rotary joint housing 3 while surrounding a rotary joint rotor 2. As shown in FIGS. 3 and 4, the outer diameter of the cam 1 is small in both the upper and lower stages in the forward region a, large in both the upper and lower stages in the rearward region b, and large in the upper region in the leftward region c. The lower part is small, and the upper part is small and the lower part is large in the rightward region d.
【００１１】また、前記ロータリージョイントロータ２
近傍の上部旋回体５にブラケット６を介して位置センサ
として二個のリミットスイッチ７，８が固設され、該リ
ミットスイッチ７の端子は前記カム１の上段側面に係合
し、リミットスイッチ８の端子は該カム１の下段側面に
係合している。そして、各リミットスイッチ７，８は該
カム１の外径の大きい領域と接触しているときは端子が
押圧されてONになり、一方、小さい領域と接触している
ときは端子の押圧が解除されて0FF になるように設定さ
れている。Further, the rotary joint rotor 2
Two limit switches 7 and 8 are fixedly mounted as position sensors on the upper revolving structure 5 via a bracket 6, and the terminals of the limit switches 7 engage the upper side surface of the cam 1, and The terminal is engaged with the lower side surface of the cam 1. When each of the limit switches 7 and 8 is in contact with a region having a large outer diameter of the cam 1, the terminal is pressed and turned ON, while when the terminal is in contact with a small region, the terminal is released. Is set to 0FF.
【００１２】而して、上部旋回体５の下部走行体４に対
する旋回位置が前向領域ａにあるとき、図５に図示せる
如く、二個のリミットスイッチ７，８はともにカム１の
外径の小さい領域と接触しているので、双方ともに0FF
になっている。そして、上部旋回体５が下部走行体４に
対して反時計方向に回転していくと、リミットスイッチ
７，８の端子は夫々カム１の上段側面および下段側面に
沿って摺動し、上部旋回体５が左向領域ｃに入ると、図
６に図示せる如くリミットスイッチ８は未だカム１の下
段外径の小さい領域と接触して0FF のままであるが、リ
ミットスイッチ７はカム１の上段外径の大きい領域に乗
り上げることにより端子が押圧されてONに切り替わる。When the revolving position of the upper revolving unit 5 with respect to the lower traveling unit 4 is in the forward area a, both of the two limit switches 7 and 8 have the outer diameter of the cam 1 as shown in FIG. Is in contact with the small area of
It has become. When the upper revolving unit 5 rotates counterclockwise with respect to the lower traveling unit 4, the terminals of the limit switches 7 and 8 slide along the upper side surface and the lower side surface of the cam 1, respectively. When the body 5 enters the leftward area c, as shown in FIG. 6, the limit switch 8 is still in contact with the area where the outer diameter of the lower part of the cam 1 is small, and remains at 0FF. The terminal is pressed by being mounted on a region having a large outer diameter, and is turned ON.
【００１３】更に、上部旋回体５が反時計方向に回転し
て後向領域ｂに入ると、図７に図示せる如く、リミット
スイッチ８もカム１の下段外径の大きい領域に乗り上げ
ることにより、二個のリミットスイッチ７，８はともに
ONの状態になる。更に、上部旋回体５が反時計方向に回
転して右向領域ｄに入ると、図８に図示せる如く、リミ
ットスイッチ７はカム１の上段外径の小さい領域に入っ
て端子の押圧が解除されることにより0FF に切り替えら
れ、一方、リミットスイッチ８はカム１の下段外径の大
きい領域にあってONのままである。Further, when the upper swing body 5 rotates counterclockwise and enters the rearward area b, as shown in FIG. 7, the limit switch 8 also rides over the area where the cam 1 has a large lower outer diameter. The two limit switches 7, 8 are both
Becomes ON state. Further, when the upper swing body 5 rotates counterclockwise and enters the rightward region d, as shown in FIG. 8, the limit switch 7 enters the region where the outer diameter of the upper stage of the cam 1 is small, and the pressing of the terminal is released. As a result, the switch is switched to 0FF, while the limit switch 8 remains in the area where the lower outer diameter of the cam 1 is large.
【００１４】斯くして、二個のリミットスイッチ７およ
び８の相互のスイッチング状態により上部旋回体５が前
向領域ａ、後向領域ｂ、左向領域ｃまたは右向領域ｄの
いずれの領域に位置しているかを判定することができ
る。尚、本発明は、本発明の精神を逸脱しない限り種々
の改変を為すことができ、そして、本発明が該改変され
たものに及ぶことは当然である。Thus, the upper revolving unit 5 is moved to any one of the forward region a, the backward region b, the left region c, and the right region d by the mutual switching state of the two limit switches 7 and 8. It can be determined whether it is located. The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.
【００１５】[0015]
【発明の効果】本発明は、上記一実施例にて詳述せる如
く、中空円筒状カムと二個の位置センサとによって上部
旋回体の旋回位置を簡易に検知できるように構成されて
いる。従って、従来のポテンショメータを組み込む手段
と比較すると、大幅なコストダウンを実現できるばかり
でなく、組立作業が極めて容易になる。As described in detail in the above-mentioned embodiment, the present invention is configured so that the turning position of the upper turning body can be easily detected by the hollow cylindrical cam and the two position sensors. Therefore, as compared with the conventional means for incorporating a potentiometer, not only can a significant cost reduction be realized, but also the assembly operation becomes extremely easy.
【００１６】更に、機械的カム機構を利用したものであ
るため耐久性に優れ、また保守及び修理も容易である
等、正に諸種の効果を奏する発明である。Further, the present invention has various effects, such as excellent durability because the mechanical cam mechanism is used, and easy maintenance and repair.
【図１】本発明の一実施例を示す平面図。FIG. 1 is a plan view showing an embodiment of the present invention.
【図２】図１の一部断面正面図。FIG. 2 is a partial cross-sectional front view of FIG.
【図３】図２におけるカムのＡ−Ａ線端面図。FIG. 3 is an end view taken along line AA of the cam in FIG. 2;
【図４】図２におけるカムのＢ−Ｂ線端面図。FIG. 4 is an end view of the cam taken along line BB in FIG. 2;
【図５】（ａ）上部旋回体が前向領域にあるときのカム
と二個のリミットスイッチの係合状態を示し、左向領域
側から見た一部切欠側面図。 （ｂ）そのときの下部走行体と上部旋回体との姿勢を示
す平面図。FIG. 5 (a) is a partially cutaway side view showing the engaged state of the cam and two limit switches when the upper revolving unit is in the frontward region, and viewed from the leftward region side. (B) The top view which shows the attitude | position of the lower traveling body and the upper revolving superstructure at that time.
【図６】（ａ）上部旋回体が左向領域にあるときのカム
と二個のリミットスイッチの係合状態を示し、後向領域
側から見た一部切欠側面図。 （ｂ）そのときの下部走行体と上部旋回体との姿勢を示
す平面図。FIG. 6 (a) is a partially cutaway side view showing the engaged state of the cam and two limit switches when the upper swing body is in the leftward area, and viewed from the rearward area side. (B) The top view which shows the attitude | position of the lower traveling body and the upper revolving superstructure at that time.
【図７】（ａ）上部旋回体が後向領域にあるときのカム
と二個のリミットスイッチの係合状態を示し、右向領域
側から見た一部切欠側面図。 （ｂ）そのときの下部走行体と上部旋回体との姿勢を示
す平面図。FIG. 7A is a partially cutaway side view showing the engagement state of a cam and two limit switches when the upper revolving unit is in a rearward region and viewed from a rightward region side. (B) The top view which shows the attitude | position of the lower traveling body and the upper revolving superstructure at that time.
【図８】（ａ）上部旋回体が右向領域にあるときのカム
と二個のリミットスイッチの係合状態を示し、前向領域
側から見た一部切欠側面図。 （ｂ）そのときの下部走行体と上部旋回体との姿勢を示
す平面図。FIG. 8 (a) is a partially cutaway side view showing the engagement state of the cam and two limit switches when the upper revolving unit is in the rightward region, and viewed from the frontward region side. (B) The top view which shows the attitude | position of the lower traveling body and the upper revolving superstructure at that time.
１ 中空円筒状カム ２ ロータリージョイントロータ ４ 下部走行体 ５ 上部旋回体 ７，８ リミットスイッチ DESCRIPTION OF SYMBOLS 1 Hollow cylindrical cam 2 Rotary joint rotor 4 Lower traveling body 5 Upper revolving body 7, 8 Limit switch
Claims (1)
して上部旋回体を載設した建設機械において、上部旋回
体に固設されて回動するロータリージョイントロータの
外周に沿って該ロータリージョイントロータを囲繞する
中空円筒状のカムを下部走行体に固設し、且つ、該カム
の上段および下段は夫々前向領域、後向領域、左向領
域、右向領域のいずれか二領域ごとに外径が異なるよう
に形成され、且つ、該カムの下段は、上段の外径が大き
い二領域のうちの一領域のみの外径が小さく形成される
とともに、上段の外径が小さい二領域のうちの一領域の
みの外径が大きく形成され、更に、前記ロータリージョ
イントロータ近傍の上部旋回体に二個の位置センサを固
設するとともに、該二個の位置センサを夫々前記カムの
上段側面および下段側面に沿って移動させて、該二個の
位置センサを相互にON、0FF させることにより上部旋回
体の旋回位置を判定することを特徴とする建設機械の旋
回位置検出装置。1. A construction machine in which an upper revolving unit is mounted on a lower traveling unit via a rotary joint, and surrounds the rotary joint rotor along the outer periphery of a rotating rotary joint rotor fixed to the upper revolving unit. A hollow cylindrical cam to be fixed to the lower traveling body, and the outer diameter of the upper and lower tiers of the cam is set in each of two regions of a forward region, a rearward region, a leftward region, and a rightward region, respectively. The lower stage of the cam is formed differently and the outer diameter of only one region of the two regions of the upper stage where the outer diameter is large is formed to be small, and the lower stage of the cam is one of the two regions where the outer diameter of the upper stage is small. The outer diameter of only the region is formed large, and two position sensors are fixed to the upper revolving unit near the rotary joint rotor, and the two position sensors are respectively connected to the upper side surface and the lower side of the cam. A turning position detection device for a construction machine, wherein the turning position of an upper turning body is determined by moving the two position sensors on and off of each other along a plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24041694A JP2749781B2 (en) | 1994-10-04 | 1994-10-04 | Turning position detector for construction machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24041694A JP2749781B2 (en) | 1994-10-04 | 1994-10-04 | Turning position detector for construction machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08105739A JPH08105739A (en) | 1996-04-23 |
| JP2749781B2 true JP2749781B2 (en) | 1998-05-13 |
Family
ID=17059156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24041694A Expired - Lifetime JP2749781B2 (en) | 1994-10-04 | 1994-10-04 | Turning position detector for construction machinery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2749781B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4900400B2 (en) * | 2009-02-04 | 2012-03-21 | コベルコ建機株式会社 | Swivel angle detection device and swivel work machine equipped with the same |
| EP3132176B1 (en) | 2014-04-15 | 2018-07-11 | CNH Industrial Italia S.P.A. | Swivel joint with hydraulic position signal |
| CN108120463B (en) * | 2016-11-30 | 2020-04-10 | 北京航天计量测试技术研究所 | Limiting mechanism |
| JP7262276B2 (en) * | 2019-03-29 | 2023-04-21 | ミネベアミツミ株式会社 | absolute encoder |
| CN112857185B (en) * | 2020-12-31 | 2022-06-24 | 恒天九五重工有限公司 | Real-time detection method for rotation angle of rotary drilling rig |
-
1994
- 1994-10-04 JP JP24041694A patent/JP2749781B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08105739A (en) | 1996-04-23 |
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