JPH0750591Y2 - Clutch lever device for work vehicle - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a clutch lever device for a traveling machine body provided with a main clutch mechanism such as a tailor, a management machine, and a tiller, and a work clutch mechanism. is there.

[Problems to be Solved by Prior Art and Invention] In general, a traveling machine body of this type is provided with a main clutch mechanism and a work clutch mechanism, and conventionally, operation of turning on and off these clutch mechanisms has been performed. , Each had a structure in which it was independently operated by operating a dedicated lever. Therefore, it is extremely dangerous that the main clutch mechanism can be operated when the work clutch mechanism is in the on state. Therefore, there are some devices that are equipped with a check mechanism to prevent the main clutch mechanism from entering and operating when the work clutch mechanism is in the on state.However, these devices have a complicated structure and the operation levers for both clutches are still independent. It is necessary and has a drawback that the operation becomes complicated.

[Means for Solving the Problems] In view of the above circumstances, the present invention was devised with the object of providing a clutch lever device for a working traveling vehicle capable of eliminating these drawbacks.
A substantially U-shaped lever guide configured by arranging a main clutch operation guide and a work clutch operation guide in parallel and connecting one end with a connecting guide; and a clutch lever guided by the lever guide. When the locking metal fittings connected to each clutch mechanism side and arranged on the corresponding clutch operation guide side and the clutch lever are operated to any operation guide side by the connection guide, the engagement side of the operated side When the clutch arm is operated to one end of the clutch operation guide with the connecting guide and the operating arm provided on the clutch lever to selectively engage the stopper and switch the clutch of the engaging metal. A holding portion for locking and holding the locking metal fitting on the operated side and a tension pulley for tensioning the tension belt are provided at the tip end portion of the belt. A tension arm whose base end is swingably supported via a support shaft so as to be displaced in a loose state, and a tension ammunition for biasing the tension arm toward the belt tension side, and On the main clutch operation mechanism side, the locking metal fitting is in the on state at one end side of the operation guide and in the cut state at the other end side, and at the work clutch mechanism side,
The locking metal fittings are set so that one end of the operation guide is in the cut state and the other end is in the closed state, and the base end is a support shaft so that it can swing together with the tension arm. An auxiliary arm pivotally supported is provided, and one end of the tension ammunition is attached to the auxiliary arm, and a moment arm from the support shaft becomes longer in the tension arm belt tension state and becomes shorter in the belt relaxation state. It is characterized in that it is slidably locked so that

The present invention, with this configuration, ensures that the main clutch and the work clutch can be reliably operated with a single operating tool.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a Taylor traveling machine body, which is connected to a rotary type tilling work section 2. The traveling machine body 1 includes a driving handle 3, wheels 4, an engine 5, and a transmission. It is the same as that of the related art that it is configured by the member devices such as the case 6 and the like.

The driving handle 3 is provided with a side clutch lever 7 and a clutch lever 8. The base end portion of the clutch lever 8 is loosely fitted to a support shaft 9a provided in a lever case 9 and oriented in the left-right direction. The lever case 9 is pivotally supported so that it can be swung back and forth and tilted to the left and right, and can be operated along a substantially U-shaped guide hole 9b provided in the lever case 9. In the embodiment, the guide hole 9b is for the main clutch operation on the left side, the front side is the clutch entry position and the rear side is the clutch cutting position, while the right side is for the work clutch operation and the front side is At the clutch cutting position, the rear side is set to be the clutch entering position, and these operation grooves are connected to the front side via a connection guide 9c.

The lever case 9 has a base end portion of a wire 10 interlockingly connected to a tension arm 16 constituting a main clutch mechanism described later and a base end portion of a wire 11 interlockingly connected to a shifter arm constituting a work clutch mechanism also described later. The ends are wired left and right, and the fittings 10a, 11a are integrally connected to the base ends of the wires 10, 11. And wire
The metal fittings 10 and 11 are configured so that the metal fittings 10a and 11a are engaged and held by the engagement receiving tool 12 provided on the inner surface of the case in the wire feeding direction, that is, the movement in the forward direction.

On the other hand, in the middle of the clutch lever 8, an operating arm 8a projects in the left-right direction, and the clutch lever 8a
Is set to the position of the connecting guide 9c, the operating arm 8a
Is located between the metal fittings 10a and 11a and does not interfere with them, but when the clutch lever 8 is tilted to the left main clutch operating side, the main clutch side wire 10 arranged on that side When the operating arm 8a interferes with the metal fitting 10a from the front side and engages with it, and when the clutch lever 8 is operated to the rear cutting side, the metal fitting 10a is forcibly moved backward and the wire 10 is pulled in conjunction with this. As a result, as will be described later, when the main clutch is in the cut state, and when it is tilted to the right work clutch side, the operating arm 8 similarly interferes with the work clutch side metal fitting 11a arranged on the left side, and When the clutch lever 8 is operated backward, the wire 11 is pulled so that the work clutch is in the engaged state. The operating arm 8a is attached to one of the metal fittings 10
When the clutch lever 8 is operated to the front position from the state in which the wires 10 and 11 are pulled by operating the clutch lever 8 rearward by engaging the clutch levers a and 11a, the metal fittings 10a and 11a are re-engaged. Is set so as to be engaged and held by the.

The main clutch mechanism includes an output pulley 13 on the engine 5 side,
Members such as the input pulley 14 on the side of the transmission case 6, the tension belt 15 suspended around these pulleys 13 and 14, and the tension pulley 16 that tightens and tightens the tension belt 15 to turn power transmission on and off. The tension arm 16 on which the tension pulley 16 is pivotally supported has a mechanism that swings about a support shaft 17a as a fulcrum, and the tension arm 17 further includes an auxiliary arm 17
b is integrally provided. The distal end of the wire 10 is connected to the distal end of the auxiliary arm 17b, and a long hole 17c is further formed. The long hole 17c and the body frame 1a
A tension ammunition 18 is interposed between the and. When the wire 10 is being fed out by operating the lever to the front position (entry position) on the side of the main clutch guide 9a described above, the tension arm 17 receives the urging force of the ammunition 18 to move the tension pulley 16 to the position. The belt is displaced to the tension side, which causes the main clutch to enter, and in contrast to this,
When the clutch lever is operated to the rear cutting position and the wire 10 is pulled against the ammunition 18 as described above, the tension of the belt by the tension pulley 16 is released and the tension belt 15 becomes loose. The main clutch is configured to be cut.

Moreover, in this thing, the ammunition 18 has the long hole 17c as described above.
The ammunition 18 is slidably engaged with the slot 17c. That is, the auxiliary arm 17b swings due to the push-pull operation of the wire 10, but the wire 10 is pulled out from the state in which the wire 10 is sent out to put the main clutch in the inserted state and cut into the cut state. When it is hit, the ammunition 18 will extend, but at this time, the ammunition
18 slides in the long hole 17c so as to be displaced from a position near the support shaft 17a to a position distant from the position near the support shaft 17a due to a change in the posture of the long hole 17c. As a result, when the clutch lever 8 is operated from the entry position to the cutting position side on the main clutch groove side, the moment arm position of the ammunition 18 with the support shaft 17a of the auxiliary arm 17b as a fulcrum changes long, As a result, the wire load is reduced when the ammunition 18 is fixedly attached, at the stage when the ammunition 18 moves in the middle, and the operation load is reduced. We are trying to improve sex.

The work clutch mechanism is assembled in the transmission case 6, and the work clutch mechanism works by connecting the transmission gear 14a provided on the input pulley 14 to the intermediate gear 19a provided on the intermediate shaft 19. Is connected to a final gear 20a, which is rotatably supported by a power take-off shaft 20 for use in. A shifter gear 21 is spline-fitted to the output shaft 20 so as to be capable of meshing with a claw gear 20b provided on the final gear 20a. The shifter fork 22 engaged with the shifter gear 21 is It is connected to the wire 11 for the working clutch by interposing the ammunition 23. Shifter fork 22 and transmission case 6
Further, an ammunition machine 24 is interposed between and, and when the work clutch is in the cut state, that is, by operating the clutch lever to the front position (cut position) side, the wire 11 is sent out. In this case, the ammunition 23 is contracted and its urging force is reduced, so that the shifter fork 22 receives the urging force of the ammunition 24 and the meshing of the shifter gear 21 with the claw gear 20b is released. On the other hand, when the lever is operated to the entry position of the rear position and the wire 11 is pulled as described above,
The urging force of the extended ammunition 23 exceeds the urging force of the ammunition 24, whereby the shifter fork 22 shifts the shifter gear 21 to the claw gear 20.
It moves so as to mesh with b, whereby the work clutch is put into the engaged state and the power take-off shaft 20 is driven.

Further, reference numeral 25 denotes a traveling speed change lever, and the speed change lever 25 projects rearward from a lever guide 26 provided at a base end portion of the driving handle 3. The lever guide 26 is attached to a steel plate base plate 26a. The panel plate 26b made of resin is applied and assembled. In this case, the lower part of the base plate 26a is bent backward, and the panel plate 26 is aligned with this.
Although b is also configured to be bent, the panel plate 26b is thin at this bent portion, and when the bending angle with the base plate 26a does not match due to a processing error or the like, In response to this, it is possible to flexibly bend and match.

Further, in the present embodiment, the following measures have been taken to attach the driving handle 3. In other words, the steering wheel 3
Will be attached to the handle frame 27 fixed to the transmission case 6 side, and the mounting pipe 3a and the reinforcing plate 3b are integrally welded to the base end portion of the driving handle 3, and Align the mounting pipe 3a with the mounting hole 27a formed in the handle frame 27, and
The driving handle 3 is pivotally supported by means of 8 so as to be vertically swingable.
A mounting pipe 3c is further provided at the base end of the driving handle 3. The mounting pipe 3c is aligned with any of the adjusting holes 27b, 27c formed in the handle frame 27 and fixed by a bolt 28. By doing so, the steering wheel 3
Will be integrally assembled with a height-adjustable structure.
Further, 28 is a resin protective cover,
28 has a split groove 28a formed at the lower end thereof, which can be retrofitted on the driving handle 3, and the mounting hole 28b formed in the split groove portion corresponds to the mounting hole 3d formed in the reinforcing plate 3b. Then, the bolts 28 are used to integrally fix them.

Further, in this embodiment, the rear bonnet 29 is also devised. That is, the rear bonnet 29 covers the front upper part of the handle frame 27, and the air cleaner 30 is arranged in front of it. And handle frame
An air hole 27d is formed on the upper surface of a portion where the rear bonnet 29 of 27 overlaps, and an air hole 29a is formed on the front surface of the rear bonnet 29, respectively.
An air flow path that reaches the air cleaner 30 through the air holes 29a is formed, and by passing through this air flow path, the air supplied to the air cleaner 30 causes the mud and muddy water to be rolled up by the working unit 2, the wheels 4, and the like. It is considered that it is not included.

On the other hand, the structure for cooling the fuel tank 31 is also devised.
In other words, for those with a recoil starter,
The cover 32 can be effectively used as shown in FIGS. The recoil starter cover 32 is arranged on the side of the engine 5, and the cover 32
Are divided into upper and lower parts through a filter 32a, and are opened so as to communicate with the cover 31a of the fuel tank 31 (the filter 32a is also provided here), while
The lower chamber is open so as to communicate with the 5th part of Encidin. Then, the engine 5 is cooled by the air that has passed through the recoil starter cover 32 from the fuel tank 31, so that the fuel tank 31 can be positively cooled and the cooling air can be prevented from being clogged. Is considered as.

On the other hand, the upper cover 34 of the working unit 2 is also devised. In other words, the working unit 2 is provided with an auxiliary cover 35 swingably provided on both left and right sides of the upper cover 34 when forming a ridge.
May be lifted upward, but the attachment structure of the auxiliary cover 35 to the upper cover 34 is devised. That is, the support plates 34a and 34b are provided outwardly at the front and rear of the side surface of the upper cover 34 while the auxiliary cover 35
On the support plates 34a, 34b, brackets 35a, 35b for pivotally supporting the supporting shaft 35c as a fulcrum are provided so as to project upward, but for the front part above the plowing pawl 36, the bracket 35
The protruding length of a is set to be longer than that of the rear. Then, the auxiliary cover 35 is brought into contact with the upper cover 34 so as to overlap it from below, so that the upper cover 34 has a horizontal posture in which the upper cover 34 is extended outward as it is. Also, the auxiliary cover 35 is inclined upward with the support shaft 35c as a fulcrum. The vertical displacement of the inner end of the auxiliary cover 35 is set to be smaller on the front side closer to the plowing pawl 36 than on the far rear side (A <B) when it is erected in a vertical shape. This allows the upper cover 34 and the auxiliary cover 35 to be as close to the tilling pawl 36 as possible.

Further, the base end portion of the holding stay 37 is pivotally supported on the auxiliary cover 35, and a long hole 37a formed at the tip end portion of the holding stay 37 is provided on the angle adjusting fitting 38 of the upper cover 34 so as to project. By fitting it to the pin 38a and tightening it with the nut 38b, it becomes possible to maintain it in a horizontal posture or an inclined posture.
Has a structure in which the sensitivity of the upper cover 34 can be adjusted by selectively locking the hook portion 38c at the upper end to a plurality of upper and lower locking holes 39a formed in a locking plate 39 provided on the body 1 side. The metal fitting 38 is designed to be used in common.

In the embodiment of the present invention constructed as described above, when the clutch lever 8 is set to the main clutch operating side and operated to the rear cutting position, the main clutch side wire 10 is pulled as described above, and Then, the main clutch mechanism is in the cut state, but when the clutch lever 8 is set to the forward insertion position from this state, the wire 10 is fed out and the main clutch mechanism is in the closed state. In this state, when the clutch lever 8 is tilted to the work clutch operating side on the right side, the operating arm 8a is disengaged from the locking metal fitting 10a, and the locking metal fitting 10a is locked to the locking receiver 12 so that the main clutch mechanism enters. When the clutch lever 8 is maintained in the state and the clutch lever 8 is operated to the entry position of the work clutch guide as it is, the operating arm 8a is locked by the locking metal fitting 11a and the wire 11 is pulled,
As a result, the work clutch mechanism is put in the on state.

In this way, in the embodiment of the present invention, the main clutch and the work clutch are individually switched by using the single clutch lever 8, but in this one, the work clutch mechanism is inserted. When switching to the side, the main clutch mechanism is always in the on state, so there is no possibility that the main clutch mechanism will be switched to the on state when the work clutch mechanism is in the on state as in the past, which is a safety feature. The clutch can be switched in the state where is surely secured. Moreover, since switching of these clutch mechanisms can be performed by a simple lever operation of the single clutch lever 8, there is an advantage that operability can be improved.

In addition, one end of the tension ammunition 18 assists the moment arm from the support shaft 17a of the auxiliary arm 17b provided so as to swing integrally with the tension arm 17 to be long when the belt is tensioned and short when the belt is relaxed. As a result of the arm 17b being slidably locked in the arm length direction, when the clutch lever 8 is turned on and off on the main clutch groove side, the operating load of the clutch lever 8 becomes the main clutch cut state of the moment arm. The operation load can be reduced by shortening in a short state, and the operability can be improved because the on / off state of the main clutch can be sensibly recognized.

[Advantages] In short, since the present invention is constructed as described above, the switching is guided by the substantially U-shaped lever guide in the main clutch mechanism and the work clutch mechanism. By operating the first clutch lever,
When switching the respective clutch mechanisms, and when trying to switch the work clutch mechanism to the entry side, the interference of the clutch lever with the main clutch mechanism side always leaves the main clutch mechanism in the entry state. Accordingly, there is no problem that the main clutch mechanism is set to the on state when the main clutch mechanism is in the cut state, and the safety is remarkably improved. Moreover, since both clutch mechanisms can be switched by operating a single lever, operability can be improved.

In addition, one end of the tension ammunition machine is slidable so that the moment arm from the support shaft is long when the belt is tensioned and short when the belt is relaxed on an auxiliary arm that swings integrally with the tension arm. As a result of locking, when the clutch lever is turned on and off on the main clutch groove side, the operating load of the clutch lever is reduced in the short state of the moment arm that is in the main clutch cut state, and the operation load can be reduced. , It is possible to intuitively recognize the turning on and off of the main clutch and improve the operability.

[Brief description of drawings]

FIG. 1 shows an embodiment of a clutch lever device for a traveling machine body according to the present invention. FIG. 1 is an overall side view of a cultivator, FIG. 2 is a plan view of a lever guide portion, and FIG. Fig. 4 is a side view of the same as above. Fig. 4 is an explanatory view of the action of the main clutch mechanism.
FIG. 5 is a graph showing the relationship between the load of the main clutch actuating wire and the lever operating position, and FIGS. 6 and 7 are plan views, side views, and eighth views showing the connection of the work clutch actuating wire. FIG. 9 is a development view of the transmission case, FIG. 9 is a cross-sectional view of the traveling clutch lever guide, FIG. 10 is a perspective view of an essential part showing a mounting portion of a driving handle, FIG. 11 is a cross-sectional front view of the same, and FIG. Is a sectional side view of the same as above, FIG. 13 is a schematic side view of a cultivator, FIG. 14 is an exploded perspective view of a cleaner cover part, FIG. 15 is a schematic side view of another cultivator, and FIG. 16 is a recoil starter cover part. And FIG. 17 is an operation explanatory view of the auxiliary cover portion. In the figure, 1 is a traveling machine body, 2 is a working unit, 8 is a clutch lever, 8a is an operating arm, 9 is a lever case, 9a is a main clutch guide, 9b is a work clutch guide, 9c is a connecting guide,
10 and 11 are wires, 10a and 11a are locking metal fittings, 17a is a support shaft, 17b
Is an auxiliary arm and 17c is a long hole.

Front page continued (72) Kenichi Fukada, 667 Izaya-cho, Higashi-Izumo-cho, Yatsuka-gun, Shimane Prefecture 667 Inside Mitsubishi Agricultural Machinery Co., Ltd. (72) 667 Address, 667 Iza-cho, Hiji-Izumo-cho, Yatsuka-gun, Shimane Prefecture In Mitsubishi Agricultural Machinery Co., Ltd. (72) Inventor, Yoshiyuki Adachi, 667 Izuya-cho, Higashi Izumo-cho, Yatsuka-gun, Shimane Prefecture 1 In Mitsubishi Agricultural Machinery Co., Ltd. (56) References: 62-12542 (JP, U) 54-37638 (JP, U) Actually opened 56-45928 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A substantially U-shaped lever guide in which a main clutch operation guide and a work clutch operation guide are arranged in parallel and one end of which is connected by a connecting guide.
A clutch lever guided by the lever guide, a locking metal piece that is interlockingly connected to each clutch mechanism side, and is disposed on the corresponding clutch operation guide side, and a clutch lever that is connected to either operation guide side by a connection guide. When operated, the operating arm provided on the clutch lever for selectively engaging the engaging metal fitting on the operated side to perform the clutch switching operation of the engaging metal, and the clutch having a coupling guide for the clutch lever. When operated on one end side of the operation guide, a holding portion for locking and holding the locking metal fitting on the operated side, and a tension pulley for tensioning the tension belt are provided at the tip portion, so that the belt is in a loosened state. And a tension arm whose base end is pivotally supported by a support shaft so that the tension arm is displaced toward the belt, and a tension arm for urging the tension arm toward the belt tension side. On the side of the main clutch operating mechanism, the locking metal fitting is on at one end side of the operation guide and is in the cutting state on the other end side, and on the work clutch mechanism side, the locking metal fitting is at the operation guide side. The one end side is cut and the other end side is turned on and off, and the base end is pivotally supported by a spindle so that it swings integrally with the tension arm. An auxiliary arm is provided, and one end of the tension ammunition is slidably engaged with the auxiliary arm so that the moment arm from the support shaft becomes longer when the tension arm is in a belt tension state and becomes shorter when the belt is in a relaxed state. It is a clutch lever device for working vehicles that is stopped.