JPS633781B2 - - Google Patents
Info
- Publication number
- JPS633781B2 JPS633781B2 JP12607182A JP12607182A JPS633781B2 JP S633781 B2 JPS633781 B2 JP S633781B2 JP 12607182 A JP12607182 A JP 12607182A JP 12607182 A JP12607182 A JP 12607182A JP S633781 B2 JPS633781 B2 JP S633781B2
- Authority
- JP
- Japan
- Prior art keywords
- pto
- switch
- rotate
- pto shaft
- machine
- 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
Links
- 238000010586 diagram Methods 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/28—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of power take-off
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
Description
【発明の詳細な説明】
この発明は、トラクタのPTO軸用の安全装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a safety device for a PTO shaft of a tractor.
第１図に示す如く、トラクタ１の後部にロータ
リ耕耘機等の作業機２を連結し、PTO軸３から
自在継手４を介して作業機２に回転動力を伝えつ
つ作業を行なう場合において、リフトアーム５を
上向きに回動させて作業機２を持ち上げるとき
は、PTO軸３の回転が自動的に停止するように
構成したトラクタが知られている。第２図はこの
ようなトラクタのPTO操作回路をあらわすもの
で、この回路において自動・手動切換えスイツチ
SW1を「自動」に設定し、リフトアーム５回動用
のリフトレバー６設置部に設けた上・下切換えス
イツチSW2をリフトレバー６の操作により「上」
とすると、作業機２が上昇するとともにPTO軸
の回転が停止し、さらにPTOチエンジレバーが
「入」の状態にあるときはその「入」「切」を検出
するPTOチエンジレバースイツチSW3がONとな
るため警報ランプＬが点滅する。SW1を「自動」
に設定した状態でリフトレバー６を上・下切換え
スイツチSW2が「下」となるように作業機降下側
に操作すると、作業機２が降下し、ソレノイドバ
ルブ９が作動してPTOクラツチ１０を「入」状
態とするためPTO軸３が回転を開始する。 As shown in Fig. 1, when a working machine 2 such as a rotary tiller is connected to the rear of a tractor 1 and the work is carried out while transmitting rotational power from the PTO shaft 3 to the working machine 2 via the universal joint 4, the lift A tractor is known in which the rotation of the PTO shaft 3 is automatically stopped when the arm 5 is rotated upward to lift the work implement 2. Figure 2 shows the PTO operation circuit for such a tractor, and in this circuit there is an automatic/manual changeover switch.
Set SW 1 to "auto", and operate the lift lever 6 to set the up/down switch SW 2 , which is installed at the lift lever 6 installation part for rotating the lift arm 5, to the "up" position.
Then, as the work equipment 2 rises, the rotation of the PTO shaft stops, and when the PTO change lever is in the "on" state, the PTO change lever switch SW 3 , which detects whether it is "on" or "off," is turned on. As a result, the alarm lamp L blinks. Set SW 1 to “Auto”
When the lift lever 6 is set to ``lower'' and the lift lever 6 is moved to lower the work equipment so that the up/down changeover switch SW 2 is set to ``down'', the work equipment 2 will be lowered, the solenoid valve 9 will be activated, and the PTO clutch 10 will be activated. The PTO shaft 3 starts rotating in order to enter the "on" state.
上記従来のPTO操作回路をそなえたトラクタ
では、作業機２を持ち上げたときにPTO軸３の
回転を自動的に停止させることができるが、持ち
上げられている作業機２を再度降下させたとき
は、走行停止中においてもPTO軸が自動的に回
転を開始するので、きわめて危険であつた。特に
アツプカツト式のロータリ耕耘機の場合は、衣類
等に引掛かりやすい耕耘爪が耕耘機の下降ととも
に突然回転し始めるので危険性が高かつた。 In a tractor equipped with the conventional PTO operating circuit described above, the rotation of the PTO shaft 3 can be automatically stopped when the work equipment 2 is lifted up, but when the work equipment 2 that has been lifted is lowered again. This was extremely dangerous because the PTO shaft automatically started rotating even when the vehicle was stopped. Particularly in the case of an up-cut type rotary tiller, the tiller claws, which tend to get caught in clothing, etc., suddenly begin to rotate as the tiller descends, posing a high risk.
この発明は、トラクタの走行停止中は作業機を
降下させても自動的にPTO軸が回転し始めるこ
とのないような安全装置を提供するものであり、
これについて以下に説明する。 This invention provides a safety device that prevents the PTO shaft from automatically starting to rotate even if the work equipment is lowered while the tractor is stopped.
This will be explained below.
第３図は、本発明にかかるPTO軸用安全装置
の１例をあらわす回路図であり、この装置には自
動制御手段による制御と手動操作手段による操作
とを切換選択することのできる切換手段としての
自動・手動切換えスイツチSW1、リフトレバー６
の上下操作により切り換えられる上・下切換えス
イツチSW2、PTOチエンジレバーの「入」「切」
により切り換えられるPTOチエンジレバースイ
ツチSW3、走行系のメインチエンジレバー１１の
「入」「切」により切り換えられるメインチエンジ
部スイツチSW4、警報ブザー用スイツチSW5、お
よび手動操作スイツチSW6が設けられている。上
記SW2，SW3，SW4、等は自動制御手段を構成
し、上記SW6は手動操作手段を構成する。油圧式
PTOクラツチ１０作動用のソレノイドバルブ９、
警報ブザーBZ、警報ランプＬ等は、上記諸スイ
ツチを介して電源であるバツテリー１２に接続さ
れている。 FIG. 3 is a circuit diagram showing an example of the PTO axis safety device according to the present invention, and this device includes a switching means that can switch between control by automatic control means and operation by manual operation means. automatic/manual switching switch SW 1 , lift lever 6
Up/down changeover switch SW 2 , which can be switched by up/down operation of the PTO change lever, "on" and "off"
There are provided a PTO change lever switch SW 3 which is switched by the main change lever 11 of the driving system, a main change part switch SW 4 which is switched by turning on and off the main change lever 11 of the driving system, an alarm buzzer switch SW 5 and a manual operation switch SW 6 . ing. The above SW 2 , SW 3 , SW 4 , etc. constitute automatic control means, and the above SW 6 constitutes manual operation means. hydraulic
solenoid valve 9 for operating the PTO clutch 10;
The alarm buzzer B Z , alarm lamp L, etc. are connected to a battery 12 as a power source via the above-mentioned switches.
第３図の回路において、自動・手動切換えスイ
ツチSW1を「自動」側に切り換え、リフトレバー
６を作業機２上昇側に設定すると、上・下切換え
スイツチSW2が「上」に設定されるのでソレノイ
ドバルブ９に電流が流れなくなり、ポンプＰから
の作動油はタンクＴに還流され、PTOクラツチ
１０が切れた状態に保たれる。このため、PTO
軸３は回転しなくなる。また、上・下切換えスイ
ツチSW2が「上」に設定された状態でPTOチエ
ンジレバースイツチSW3が「入」となつておれ
ば、警報ランプＬが点滅する。 In the circuit shown in Figure 3, when automatic/manual changeover switch SW 1 is switched to the "auto" side and lift lever 6 is set to the work equipment 2 upward side, up/down changeover switch SW 2 is set to "up". Therefore, no current flows to the solenoid valve 9, and the hydraulic oil from the pump P is returned to the tank T, keeping the PTO clutch 10 in a disengaged state. For this reason, PTO
Axis 3 no longer rotates. Further, if the PTO change lever switch SW 3 is set to "on" with the upper/lower selector switch SW 2 set to "up", the alarm lamp L flashes.
スイツチSW1が「自動」の状態でリフトレバー
６を作業機降下側に設定すると、スイツチSW2が
「下」側に切り換えられる。このとき、メインチ
エンジレバー１１が切れた状態、すなわち走行が
停止している状態では、メインチエンジ部スイツ
チSW4が「切」となつているためPTOクラツチ
１０は切れた状態に保たれ、PTO軸３は回転し
ない。また、警報ブザー用スイツチSW5が「入」
となつておれば警報ブザーBZが鳴るとともに警
報ランプＬが点滅する。 When the lift lever 6 is set to the work equipment lowering side with the switch SW 1 in the "automatic" state, the switch SW 2 is switched to the "down" side. At this time, when the main change lever 11 is disengaged, that is, when the vehicle is stopped, the main change switch SW 4 is in the "off" state, so the PTO clutch 10 is kept in the disengaged state, and the PTO shaft is kept in the disengaged state. 3 does not rotate. Also, alarm buzzer switch SW 5 is turned on.
If so, the alarm buzzer B Z will sound and the alarm lamp L will flash.
スイツチSW1が「自動」に、またスイツチSW2
が「下」にそれぞれ設定され、メインチエンジレ
バー１１が入つている状態（スイツチSW4が
「入」となつている状態）では、ソレノイドバル
ブ９が作動し、PTOクラツチ１０が入るため
PTO軸３が回転する。すなわち、走行中におい
てスイツチSW1が「自動」となつている状態で
は、作業機２を上げればPTO軸３の回転が停止
し、作業機２を下げれば回転が再開する。メイン
チエンジレバー１１が切れている走行停止状態で
は、作業機２を上昇させても降下させてもPTO
軸は回転しない。 Switch SW 1 is set to "Auto", and Switch SW 2 is set to "Auto"
are set to "down" and the main change lever 11 is engaged (switch SW 4 is "on"), the solenoid valve 9 operates and the PTO clutch 10 engages.
PTO shaft 3 rotates. That is, when the switch SW 1 is set to "auto" while the vehicle is running, the rotation of the PTO shaft 3 will stop when the work implement 2 is raised, and the rotation will resume when the work implement 2 is lowered. When the main engine lever 11 is disconnected and the vehicle is stopped, the PTO
The shaft does not rotate.
スイツチSW1が「手動」側に切り換えられた状
態では、手動操作スイツチSW6のON・OFFによ
つてのみソレノイドバルブ９を操作することが可
能であり、したがつて作業機２の上下状態および
メインチエンジレバー１１の「入」「切」にかか
わらずこのスイツチSW6のON・OFF操作によつ
てのみPTO軸３を回転させたり停止させたりす
ることができる。すなわち、走行停止中はスイツ
チSW1を「手動」側に切り換え、スイツチSW6を
ONにしないかぎりPTO軸３を回転させることは
できないように構成されているのである。 When the switch SW 1 is switched to the "manual" side, the solenoid valve 9 can be operated only by turning the manual operation switch SW 6 ON/OFF. Regardless of whether the main engine lever 11 is turned on or off, the PTO shaft 3 can only be rotated or stopped by turning the switch SW 6 ON or OFF. In other words, when the vehicle is stopped, switch SW 1 is switched to the "manual" side, and switch SW 6 is switched to the "manual" side.
The configuration is such that the PTO shaft 3 cannot be rotated unless it is turned ON.
以上に説明した如く、本発明にかかるPTO軸
用安全装置は、自動制御手段と手動操作手段、お
よび両者を切り換えることのできる切換手段を設
けることにより、走行中は作業機を上げることに
よつてPTO軸３の回転が停止し、作業機２を下
げることによつてその回転が再開するように自動
制御することができるとともに、走行停止中は作
業機２の上下位置にかかわらず手動操作によつて
のみPTO軸３を回転させることができるように
したので、耕耘作業等の作業を順調に行なうこと
ができるとともに、走行停止中に作業機２の回転
軸が不意に回転しはじめることが防止されるよう
になり、きわめて安全性の高いものとなつた。 As explained above, the PTO axis safety device according to the present invention is provided with an automatic control means, a manual operation means, and a switching means that can switch between the two, so that the safety device for the PTO axis can be operated by raising the work equipment while driving. The rotation of the PTO shaft 3 can be automatically controlled so that it restarts when the work equipment 2 is lowered. Since the PTO shaft 3 can only be rotated by the handle, it is possible to carry out tasks such as plowing smoothly, and the rotation shaft of the work equipment 2 is prevented from unexpectedly starting to rotate while the vehicle is stopped. It has become extremely safe.
第１図は作業機を連結したトラクタの１例をあ
らわす側面図、第２図は従来のPTO操作用の回
路図、第３図は本発明にかかる安全装置の１例を
あらわす回路図である。
１……トラクタ、２……作業機、３……PTO
軸、５……リフトアーム、６……リフトレバー、
９……ソレノイドバルブ、１０……PTOクラツ
チ、１１……メインチエンジレバー。
Fig. 1 is a side view showing an example of a tractor connected to a working machine, Fig. 2 is a circuit diagram for conventional PTO operation, and Fig. 3 is a circuit diagram showing an example of the safety device according to the present invention. . 1...Tractor, 2...Work equipment, 3...PTO
Axis, 5...Lift arm, 6...Lift lever,
9... Solenoid valve, 10... PTO clutch, 11... Main change lever.
Claims (1)
PTO軸の回転が停止するように構成された操作
回路を有するトラクタにおいて、作業機を降下さ
せたとき機体が走行中であればPTO軸が回転す
るが、機体が走行停止中の場合は作業機を降下さ
せてもPTO軸が回転しないように制御する自動
制御手段と、機体が走行停止中であつても手動操
作によりPTO軸を回転させることのできる手動
操作手段とを設けるとともに、これら自動制御手
段による制御と、手動操作手段による操作とを切
換選択することのできる切換手段を設けたことを
特徴とするPTO軸用安全装置。1 When the work equipment connected to the aircraft is raised
In a tractor that has an operating circuit configured to stop the rotation of the PTO axis, if the machine is moving when the machine is lowered, the PTO axis will rotate, but if the machine is not moving, the machine will rotate. In addition to providing automatic control means that controls the PTO shaft so that it does not rotate even when the aircraft is lowered, and manual operation means that allows the PTO shaft to rotate by manual operation even when the aircraft is stopped, these automatic controls are also provided. A safety device for a PTO shaft, characterized in that it is provided with a switching means that can switch between control by means and operation by manual operation means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12607182A JPS5918024A (en) | 1982-07-19 | 1982-07-19 | Safety device for PTO shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12607182A JPS5918024A (en) | 1982-07-19 | 1982-07-19 | Safety device for PTO shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5918024A JPS5918024A (en) | 1984-01-30 |
| JPS633781B2 true JPS633781B2 (en) | 1988-01-26 |
Family
ID=14925891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12607182A Granted JPS5918024A (en) | 1982-07-19 | 1982-07-19 | Safety device for PTO shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5918024A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0616821Y2 (en) * | 1987-04-22 | 1994-05-02 | 日野自動車工業株式会社 | Drive circuit for power take-off device |
| JPH02154646A (en) * | 1988-12-06 | 1990-06-14 | Showa Sangyo Co Ltd | Processed soybean for feed |
| JP4809743B2 (en) * | 2006-09-19 | 2011-11-09 | 株式会社クボタ | Tractor PTO clutch operation structure |
| JP4809742B2 (en) * | 2006-09-19 | 2011-11-09 | 株式会社クボタ | Tractor PTO clutch operation structure |
| JP5149755B2 (en) * | 2008-09-26 | 2013-02-20 | 三菱農機株式会社 | Work vehicle |
| JP5149756B2 (en) * | 2008-09-26 | 2013-02-20 | 三菱農機株式会社 | Work vehicle |
| JP6423714B2 (en) * | 2014-05-26 | 2018-11-14 | 極東開発工業株式会社 | Work vehicle bodywork |
-
1982
- 1982-07-19 JP JP12607182A patent/JPS5918024A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5918024A (en) | 1984-01-30 |
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