JPH04131524U - Lever interlocking structure of work vehicle - Google Patents

Abstract

(57) [Summary] [Purpose] While improving operability by providing separate lift levers and PTO clutch levers, it is possible to avoid a dangerous situation in which the rotating rotary blade comes close to the chest. I want to get rid of it. [Structure] In a lawn mower equipped with a mower lift lever 7 and a PTO clutch lever 5 for intermittent power to the mower, the PTO clutch lever 5 is activated when the lift lever 7 is operated from the neutral position to the raised position. Cut operation and P
When the TO clutch lever 5 is in the disengaged position, a rod 9, a pin 10, and a double nut 11 that link the levers 7 and 5 are connected so that the lifting lever 7 can be freely moved independently of the PTO clutch lever 5. A one-side contact type interlocking mechanism A is provided.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to work vehicles with PTO shafts such as lawn mowers and tractors. includes a lifting lever for raising and lowering the working equipment and a PTO clamp that cuts off the power to the working equipment. This invention relates to a lever interlocking structure for a working vehicle that is equipped with a separate lever.

0002

[Conventional technology]

This type of work vehicle must be equipped with a lift lever and a PTO clutch lever separately. This allows the lifting and lowering of the work equipment and the intermittent operation of its drive to be operated separately, which allows the work equipment to be The degree of freedom of operation of the machine was increased.

0003

[Problem that the idea aims to solve]

However, in the above-mentioned conventional technology, when the aircraft is stopped, the work equipment is driven and the aircraft ascends. Since it can be operated, the rotating rotary is moved to the position of the chest. There is an inconvenience that a dangerous situation arises in which the work equipment that is used is exposed. The purpose of this invention is to provide a lifting lever and a PTO clutch lever separately. The purpose is to eliminate the above inconvenience.

0004

[Means to solve the problem]

For the above purpose, the present invention provides a lifting lever for raising and lowering the working equipment and a movement lever for the working equipment. It is equipped with a separate PTO clutch lever for intermittent power, and a When moving from the standing position to the raised position, force the PTO clutch lever to the disengaged position. When a brake is operated and the PTO clutch lever is in the disengaged position, the PTO clutch lever is Both levers should be in a state that allows free movement of the lift lever regardless of the latch lever. It is characterized by being provided with a one-sided contact type interlocking mechanism that interlocks the bars.

[0005]

[Effect]

In the characteristic configuration described above, when the lift lever is operated to the raised position, the interlocking mechanism works. The PTO clutch lever is automatically disconnected. This means that the work equipment must be raised. Whenever an attempt is made to move the drive, the drive is controlled to stop, unlike conventional methods. The rotary will no longer be lifted up while still rotating. This means that the work equipment is rarely used while raised relative to the aircraft. This was obtained from the recognition of the actual situation. Is it possible to operate the lift lever freely when the PTO clutch lever is disengaged? Furthermore, when the drive of the working equipment is stopped, the working equipment can be raised and lowered freely, making inspection and maintenance easier. Easy to prepare. Also, with the PTO clutch lever in the OFF position, turn the lift lever. Operate the lift and then return the lift lever to the neutral position to release the PTO clutch lever. Since it is possible to operate the work equipment in an elevated position, it is also possible to operate it with the work equipment raised. be. In other words, while the work equipment is not raised while it is still in the driven state, It is also possible to display the driving state at any time.

[0006]

[Effect of the idea]

Therefore, the work required by providing separate lift levers and PTO clutch levers Although the equipment has a high degree of freedom of operation, it is not possible to raise the equipment while it is still in the driving state. Therefore, we have been able to provide a work vehicle that is preferable from a safety perspective and can avoid the danger of being exposed.

[0007]

【Example】

Embodiments of the present invention will be described below based on the drawings. Figure 2 shows a front mower lawn mower, where 1 is the running body and 2 is the mower (the working device). 3 is a hydraulic cylinder for raising and lowering the mower 2. As shown in FIG. ) is a switch for electrically controlling the operation of the switch 4. The PTO clutch lever 5, which is turned on and off at a, and the control valve 6 of the hydraulic cylinder 3 are A lifting/lowering lever 7 to be operated is separately provided. The PTO clutch lever 5 is centered around the axis P, and the lift lever 7 is centered around the operating axis of the control valve 6. They can each swing freely around Z, are placed close to each other, and have PTO The clutch lever 5 is held in both the engaged position and the disengaged position by the dead point spring 8. The energization is maintained at the same position.

[0008] As shown in FIG. 1, a rod 9 pivotally connected to the lower end of the lifting lever 7 is It loosely passes through a pin 10 that is pivotally supported at the lower end of the O clutch lever 5, and It is secured with a bull nut 11. These rod 9, pin 10 and double nut 11, when the lift lever 7 is moved from the neutral position to the raised position, the PT Forcibly operate the O clutch lever 5 to the disengaged position, and the PTO clutch lever 5 When in the cut position, the lift lever 7 is operated independently of the PTO clutch lever 5. A one-side abutment type linkage linking both levers 7 and 5 is installed so that the levers 7 and 5 can be moved freely. A moving mechanism A is configured. The interlocking mechanism A may have another structure, and may include the PTO clutch lever 5 and the PTO clutch. Various types of linkage structures are possible between the lift lever 7 and the hydraulic cylinder 3. Yes, we are not particular about its composition. Also, move the elevator lever 7 to the lower position. When operated, a first stop position is provided where the work equipment stops once just before touching the ground, and the PTO A mechanism that allows further descent from the first stop position after the clutch lever 5 is in the engaged position. A mechanism is installed to prevent large vibrations caused by operating equipment after it has entered the ground. It would be convenient if such inconveniences could be avoided.

[0009] In addition, in order to facilitate comparison with the drawings, symbols are written in the scope of claims for utility model registration. However, the present invention is not limited to the configuration shown in the attached drawings.

[Brief explanation of drawings]

[Figure 1] Side view showing the structure of the lever interlocking mechanism

[Figure 2] Overall side view of lawn mower

[Explanation of symbols]

5 PTO clutch lever 7 Lift lever A interlocking mechanism

Claims (1)

[Scope of utility model registration request] 1. A lifting lever (7) for raising and lowering a working device and a PTO clutch lever (5) for intermittent power to the working device are separately provided, and the lifting lever (7) can be moved from a neutral position to a raised position. When the PTO clutch lever (5) is forcibly operated to the disengaged position in conjunction with the movement operation, and when the PTO clutch lever (5) is in the disengaged position, the PTO clutch lever (5) is A lever interlocking structure for a work vehicle, which is provided with a one-sided contact type interlocking mechanism (A) that interlocks both the levers (7) and (5) in a state that allows the free movement of the lifting lever (7). .