JPS5930658Y2 - Taylor with PTO transmission - Google Patents

Description

[Detailed description of the invention] The present invention relates to a tiller with a PTO transmission that can freely change high and low rotation speeds, and is particularly suitable for attaching and detaching working equipment (e.g. rotary, power sprayer, etc.). This invention relates to a tiller with a PTO transmission that must be operated together with a transmission means (such as a rotary transmission case) of the working machine.

In conventional tillers of this kind, when plowing with a rotary attached, the PTO transmission is set to low-speed rotation, but when plowing starts, the operator leaves the PTO transmission in high-speed rotation. If you forget to change to the low-speed rotation state, or change to the high-speed rotation state by mistake during tilling work, the tiller claw shaft may rotate while the PTO transmission is in the high-speed rotation state (i.e., the tiller shaft may rotate at high speed). ) may occur, but in such a case there is a great danger to the operator, and since the rotary itself is not designed for high-speed rotation, there is no risk of damaging the rotary or the rotary transmission means.

The purpose of the present invention is to ensure the safety of workers when starting or during plowing work, as well as to prevent damage to the rotary, rotary transmission means, and tiller.

The present invention provides a tiller with a PTO transmission of this type, which is provided with a PTO operating lever that overlaps the rotary transmission case when viewed from the side of the tiller, and the PTO operating lever is positioned at a position where the PTO operating lever and the rotary transmission case interfere with each other. The PTO operating lever is in the high-speed rotation position, and the non-interfering position between the two is the low-speed rotation position of the PTO operating lever.

The present invention will be explained below based on the embodiments shown in the figures.

As shown in FIGS. 1 and 2, 1 is a tiller equipped with an engine 2 and a transmission 3 that operates by transmitting power from the engine 2, and the transmission 3 can be operated to change gears by a traveling gear shift lever 4. It has a built-in 5-axis 0 rotation speed PTO shaft as well as a travel transmission mechanism.

In the PTO transmission 6 of this embodiment, the PTO shaft 5, which is horizontally suspended inside the mission case 3 and has one end protruding outside the mission case 3, simultaneously slides at appropriate intervals in the axial direction of the PTO shaft 5. A low speed gear I and a high speed gear 8 are externally fitted and keyed so that they can freely move, and an engine 2 is horizontally suspended in the transmission case 3 in parallel with the PTO shaft 5.
A high-speed transmission gear 10 and a low-speed transmission gear 11 externally fitted and keyed at appropriate intervals on the input shaft 9 which is rotated by being transmitted with power, and the high-speed gear 8 and low-speed gear 7 are simultaneously moved in the direction of the PTO shaft 5 center. It is composed of a PTO operating lever 12 whose appropriate part is pivotally supported by the tension case 3 in order to allow it to slide, and which is freely rotatable in the direction of the arrow m19m2. P
The TO shaft 5 is brought into a high speed rotation state and the PTO shaft 5 is brought into a low speed rotation state by the meshing of the low speed gear 7 and the low speed transmission gear 11. The relationship is that, as shown in FIG. 3, when the PTO operating lever 12 is laid down with its tip 12a facing in the same direction as the protruding direction of the PTO shaft 5, the PTO transmission 6 is in the high-speed rotation state. gear meshing, and the PTO operating lever 12 is moved to its fulcrum portion 12b.
When the PTO transmission 6 is rotated in the direction of the arrow m1 with the tip 12a facing upward, the PTO transmission 6 is engaged with the gears for low speed rotation.

The tiller 1 can be equipped with various types of working equipment such as a rotary 13, a pear sprayer, or a power sprayer. However, when installing each working equipment that requires power, it is necessary to install the PTO along with each working equipment.
The rotary 1 in this invention is equipped with a transmission means for each work machine to transmit power from the shaft 5 to the work machine.
The structure of No. 3 is no different from the conventional example, and the tiller 1 has a mounting portion 15 that engages with the mounting tool 14 at the rear of the tiller 1.
The input shaft 16 for driving the rotary 13 is attached to the top of the rotary 13, and its tip is connected to the PTO.
It has an input transmission part 17 that protrudes in the same direction as the protrusion direction of the shaft 5, and an input sprocket 18, an output sprocket 19, and a chino 20 wound around them are built into a rotary transmission case 21, and both sprockets 1B and 19 Cylinder part 1
Splines that engage with splines formed at the tips of the PTO shaft 5 and the rotary man-powered shaft 16 are formed on the inner diameters of the sprockets 8a and 19a, and the cylindrical portions 18a and 19a of both sprockets 1. The rotary transmission case 21 is fitted and supported by the cylindrical support part 22.
Holes into which the PTO shaft 5, rotary 13 and human power shaft 16 can be inserted are provided at locations facing the inner diameters of both sprockets N8 and 19, respectively, and the rotary transmission case 21 is attached to the tiller 1.
In order to fix it, it is attached by hand-tightening bolts 23.

Next, the case where the rotary 13 and the rotary transmission case 21 are mounted on the tiller 1 and the state after mounting will be shown.

When attaching the rotary 13 and the rotary transmission case 21 (well, the rotary 13 is attached to the rear of the tiller 1 by the attachment means of the attachment part 15 of the rotary 13 and the attachment 14 of the tiller 1, and the rotary transmission case 21 is attached to the input sprocket 18). The inner diameter of the rotary transmission case 21 is spline-engaged with the PTO shaft 5, the output sprocket 19 is spline-engaged with the rotary manual shaft 16, and the rotary transmission case 21 is fixed to the tiller 1 with hand-tightened bolts 23. When the tip 12a of the lever 12 is in a position facing the protruding direction of the PTO shaft 5 (that is, the PTO transmission 6 is in a state for high-speed rotation), the PTO
The rotary transmission case 2 is obstructed by the operation lever 12.
1 becomes impossible to install, and the PTO operating lever 1
2 is in an upright position with its tip 12a facing upward (that is, the PTO transmission 6 is in a low-speed rotation state), the rotary transmission case 21 can be attached without being obstructed by the PTO operating lever 12. , in other words, PT
The rotary transmission case 21 can be installed only when the O transmission 6 is in a low speed rotation state.

After the rotary 13 and rotary transmission case 21 are installed, during plowing work, when the rotary 13 and rotary transmission case 21 are installed, the PTO operating lever 12 is in the low-speed rotation position A, as described above. Even if an attempt is made to turn the PTO operating lever 12 to the high-speed rotation position B due to a shock during plowing work or due to an operator's error, the lever is locked by the rotary transmission case 21 and cannot be changed to the high-speed rotation position B. It becomes.

In addition, in the case of a working machine such as a power sprayer that is equipped with a PTO transmission 6 for high-speed rotation or is operated in a high-speed rotation state, the power sprayer or the like that is attached to the front part of the tiller 1 has a transmission means that is connected to the tiller with the PTO shaft 5 as the starting end. Since it is located in the front direction, it can be installed without being disturbed when the PTO operating lever 12 is in either high or low speed rotation position, and even when installed at the rear of the tiller 1, the belt transmission device is exposed. Since the PTO operating lever 12 does not come into contact with the belt, it can be mounted even in a high-speed rotation position.

As mentioned above, the present invention has a PTO transmission device in the transmission that can freely change high and low speed rotation using the PTO operating lever, and a PTO transmission device that allows the work machine to be attached and detached together with the input transmission means of the work section.
In a tiller with a TO transmission device, a PTO operating lever is provided at a position where it overlaps with a rotary transmission case when viewed from the side of the tiller, and a position where the PTO operating lever and the rotary transmission case interfere with each other is set as a high-speed rotation position of the PTO operating lever. Therefore, when installing a rotary that uses the PTO shaft for low-speed rotation, it cannot be installed when the PTO operating lever is in the high-speed rotation position, and the PTO
This eliminates the risk of plowing with the rotary attached while the transmission is still rotating at high speed, and the PTO operating lever can be moved to a low speed position where the PTO operating lever and rotary transmission case do not interfere with each other. During rotary plowing work, the PTO operating lever is always rotated at a low speed, and when changing the position of the PTO operating lever to the high-speed rotating position, the PTO operating lever is brought into contact with the rotary transmission case. Since the PTO control lever is prevented from moving to the high-speed rotation position, there is a risk that the PTO transmission will change to a high-speed rotation state due to impact during tilling work or due to operator error, causing part of the rotor to rotate at high speed. This has the effect of not only ensuring the safety of the workers but also preventing damage to a part of the rotary.

[Brief explanation of drawings]

Figure 1 is a side view of a tiller in which the present invention is implemented and a part of the rotary rotary is installed, Figure 2 is a partially cutaway plan view showing the main parts of Figure 1, and Figure 3 shows the operation of the PTO operating lever. The first shown
Schematic rear view of the main parts in Figure 1. 1... Tiller 6... PTO transmission, 7... PTO gear lever, 13...
・Rotary 21...Rotary transmission case.

Claims (1)

[Scope of utility model registration request] In a tiller equipped with a PTO transmission, which has a PTO transmission in its transmission that allows the PTO shaft to be freely rotated at high and low speeds with a PTO operating lever, and which attaches and detaches the working part along with a human power transmission means for the working part, the working part is a rotary transmission. When installing a rotary work machine with a case, an operating lever is provided at a position where it overlaps with the rotary transmission case when viewed from the side of the tiller to prevent the rotary work machine from being installed in a high speed transmission state and to prevent the rotary work machine from moving to a high speed rotation position. A tiller with a PTO transmission device, characterized in that the operation lever comes into contact with a rotary transmission case in response to a change in the position of the operation lever, thereby preventing the operation lever from moving to a high speed rotation position when a rotary working machine is attached.