JPH0352235Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field The present invention relates to a tiller, especially a small tiller that incorporates a rotary, and more specifically consists of a tiller's fuel tank, speed change panel, etc. Regarding the structure of the outer shell.

(b) Prior art In general, the speed change panel in a tiller is placed on the rear of the handle frame in the case of a large tiller or tailor, and on the side of the transmission case in the case of a control machine. There is.

(c) Problems to be solved by the invention By the way, in the case of the above-mentioned small-sized tiller, if the speed change panel is placed at the rear of the handle frame, the area of the speed change panel is limited, making it impossible to obtain a sufficient lever stroke. At the same time, the display of characters etc. becomes small and difficult to see.

In addition, if the shift panel is placed on the side of the transmission case, the space on either the belt cover side or the opposite side is restricted due to the structure and appearance, making it difficult to operate the shift lever and making the shift panel difficult to see. Put it away.

Furthermore, in either arrangement of the transmission panel described above, the rear part of the engine is exposed or needs to be covered with a special cover to avoid this, making it difficult to maintain a uniform appearance.

(d) Means for solving the problem The purpose of the present invention is to solve the above-mentioned problems. For example, as shown in FIG. The engine 13 is attached to the engine frame 19.
In a tiller equipped with a handle frame 18 mounted diagonally upward and rearward from the transmission case 12, the transmission has a guide groove behind the engine 13 and above the mounting portion 18a of the handle frame 18. A panel 9 is installed upright, and a fuel tank 21 disposed above the engine is supported by the speed change panel 9, and these fuel tanks 2
1 and a transmission panel 9 cover the rear and upper part of the engine.

(E) Effect Based on the above-described structure, the tiller 11 can be changed between traveling speed and rotary speed by operating the speed change lever 1 along the guide groove 10 of the speed change panel 9 (see FIGS. 6 and 7). Ru. At this time, the speed change panel 9 is approximately the full width of the transmission case 12 and has a predetermined height, so that it can be operated easily and reliably with a sufficient stroke and in accordance with the easily visible display.

(F) Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the tiller 11 includes a transmission case 12, an engine 13, running wheels 15, a rotary 16, and a handle 17, which constitute a body frame. The transmission case 12 is a large member made of a press-formed mating case. An engine frame 19 for mounting the engine 13 is fixed to the front of the transmission case 12, and a handle frame 18 is attached so as to extend diagonally rearward. Further, a traveling wheel 15 and a rotary 16 are respectively attached to the tip of the eight-shaped case portion. In addition, the belt can be tensioned and relaxed freely by the tension pulley that constitutes the main clutch, extending from the output pulley of the engine 13 to the pulley fixed to the input shaft 19 of the transmission case 12 (see Figs. 4 and 5). is wound around the belt, and the belt and pulley are covered with a case 20. Furthermore,
A speed change lever 1 extends from the top of the transmission case 12 along above the handle frame 18 and handle 17, and the speed change lever 1 is guided by a guide groove 10 of a speed change panel 9. In addition, as shown in FIG. 6 or FIG. 7, the guide 10 of the guide plate 9 is at the forward first speed position F ₁ in the lateral (left and right) direction,
Consisting of a traveling gear having a forward second gear position F ₂ , a neutral position N, a reverse position R and a working neutral position N',
Also, the vertical (up and down) direction is normal rotation position S, neutral position N _R
and a rotary rotation direction switching stage having a reverse position C.

Further, as shown in detail in FIG. 2, a mounting portion 18a of a handle frame 18 having a U-shaped cross section is attached to the upper part of the mission case 12 so as to sandwich the case 12 therebetween. A speed change panel 9 is erected diagonally upward toward the front of the machine, that is, substantially perpendicular to the handle frame 18 and the speed change lever 1. On the other hand, as shown in detail in FIG. 1, a fuel tank 21 is disposed above the rear part of the engine 13, and a bracket 21a extending from the bottom of the tank 21 is connected to the top of the speed change panel 9. , the speed change panel 9 also serves as a support for the fuel tank 21. Furthermore, the left and right portions of the transmission panel 9 are bent toward the front of the aircraft body to have a U-shaped cross section, which improves rigidity as a support, and also serves as a cover for the air cleaner 24 and the like at the rear of the engine 13. Further, the upper front part of the engine 13 is covered with a cover 28, and in combination with the fact that the fuel tank 21 and the transmission panel 9 cover the upper part and the rear part of the engine, the entire engine 13 is covered with a clear surface. It composes the design.

As shown in FIGS. 2 to 4, the gear shift lever 1 has a U-shaped base end, and the U-shaped portion 1a is rotatable in the vertical direction by a bolt pin 3. It is connected to the shifter interlocking shaft 2 so as to be integrally interlocked in the left-right direction. Further, the shifter interlocking shaft 2 is rotatably supported by a collar 34 fixed to the transmission case 12, and a speed change arm 22 is welded inside the case 12. Further, a speed change shift shaft 23 is disposed across the left and right sides of the transmission case 12, and both ends of the shift shaft 23 are held between collars 25, 25 and fixed to bolts 26, 26. A shift fork 27 is attached to the shifter shaft 23.
is slidably inserted. Further, the shift fork 27 is positioned and biased at a predetermined position by a click stop mechanism between the shift fork 27 and the shift shaft 23, and is connected to the 19-speed change arm 22. It is also engaged with a traveling shifter gear 6 which is slidably spline connected to the input shaft. On the other hand, a collar 25 holding the speed change shift shaft 23,
A U-shaped interlocking arm 5 is rotatably supported at 25, and the interlocking arm 5 is formed with a long hole 5a extending laterally, and the shift lever 1 passes through the long hole 5a. are doing. As a result, the interlocking arm 5 rotates around the collar 25 as the speed change lever 1 moves up and down, but the horizontal movement of the speed change lever 1 is absorbed by the elongated hole 5a and is not transmitted to the interlocking arm 5. Further, as shown in detail in FIG. 5, a rotary shifter interlocking shaft 27 is rotatably supported by a collar 26 fixed to the transmission case 12, and the interlocking shaft 27 is attached to a plate on the outside of the case. 29 is fixed and further connected to the interlocking arm 5 via a pin 29a and a rod 30 fixed to the tip of the plate 29, and a rotary conversion arm 31 is attached to the inside of the case of the interlocking shaft 27. It is welded. Further, a rotary shift shaft 32 is disposed adjacent to the speed change shift shaft 23 so as to span both sides of the transmission case 12, and a shift fork 33 is slidably inserted into the shift shaft 32. ing. And the shift fork 33
is positioned and biased to a predetermined position by a click stop mechanism between the shift shaft 32 and the shift shaft 32.
It engages with a rotary shifter gear 7 connected to the speed change arm 31 and slidably splined to the input shaft 19 .

In FIG. 4, the shifter gear 6 engages with the gear 35 to achieve the first forward speed F ₁ , engages with the gear 37 that normally meshes with the gear 36 to achieve the second forward speed F ₂ ,
Then, the rotary shifter gear 7 engages with the gear 40 to achieve forward rotation S by engaging the gear 39 that is always meshing with the gear 38, and the gear 42 that is always meshing with the gear 41. , and a reversal C is obtained. Furthermore, the rotation of the traveling transmission system is transmitted to the traveling wheels 15 via a chain and a differential gear, and the rotation of the rotary transmission system is transmitted to the rotary 16 via the chain.

Further, as shown in FIGS. 3 and 5, the U-shaped mounting portion 18a of the handle frame 18 is mounted so as to sandwich the transmission case 12, and the rotary shift shaft is attached by the mounting portion 18a. 32 is prevented from coming off.

Since this embodiment has the above configuration, the rotation of the engine 13 is transmitted to the input shaft 19 of the transmission case 12 via the belt inside the case 20. When the operator moves the shift lever 1 in the lateral (left and right) direction along the guide groove 10 of the shift panel 9, the left and right movement of the shift lever 1 is transferred to the shift fork 27 via the shifter interlocking shaft 2 and the shift arm 22. The fork 27 is then slid along the shift shaft 23 and positioned at an appropriate position corresponding to the display on the shift panel 9. For example, when the gear shift lever 1 is moved from the neutral position N to the forward second gear position _F2 , the fork 27 engages the travel shift shifter gear 6 with the gear 37, causing the tiller 11 to travel at high speed in order to adapt to non-working travel. When the vehicle moves to the reverse position R, the shifter gear 6 engages with the gear 39 and moves backward. At this time, depending on the left-right movement of the speed change lever 1, the lever 1 simply slides within the elongated hole 5a, and the interlocking arm 5 is not affected in any way and is maintained at the rotary stop position N _R.

Then, with the shift lever 1 located at the working neutral position N' on the shift panel 9,
When operated in the vertical (vertical) direction along the guide groove 10, the interlocking arm 5 rotates in the vertical direction around the shift shaft 23. Then, the rotary shifter interlocking shaft 27 rotates via the rod 30 and the plate 29, and the shift fork 33 slides along the shift shaft 23 via the speed change arm 31, and the shifter interlocking shaft 27 rotates via the rod 30 and the plate 29, and the shift fork 33 slides along the shift shaft 23 via the shift arm 31. It is positioned at an appropriate position. For example, when the gear shift lever 1 is moved from the neutral position N _R to the normal rotation position S, the shift fork 33 engages the shifter gear 7 with the gear 40 to transmit rotation in the same direction as the forward direction to the rotary 16, and also reverse rotation. When moving to position c, the shifter gear 7 engages with the gear 42 and transmits rotation in the opposite direction to the forward direction to the rotary 16. At this time, depending on the vertical movement of the speed change lever 1, the bolt pin 3 only rotates, and the travel shifter interlocking shaft 2 is not affected in any way and remains at the travel stop position.

Then, with the shift lever 1 moved upward or downward, the lever 1 is moved laterally along the guide groove 10 to the first forward speed position _F1 . Then,
As described above, the shifter interlocking shaft 2 and the speed change arm 22
Then, the shifter gear 6 is shifted to engage with the gear 35 via the shift fork 27, and low-speed rotation suitable for the work is transmitted to the wheels 15. This results in
The tiller 11 moves forward with the rotary 16 rotating forward or backward, and tilling work is performed.

Furthermore, when operating the shift lever 1, the shift lever 1 is guided by a relatively large shift panel 9 that has approximately the same width as the transmission case 12 in the width direction and extends close to the fuel tank 21 in the height direction. , the shift lever 1 can have a sufficient stroke, allowing a reliable shift operation with plenty of margin, and accurate operation according to the display in large letters. In particular, the guide groove 10 of the speed change panel 9
The traveling gear with a large number of gears is provided in the horizontal direction, and the rotary shift with a small number of gears is provided in the vertical direction, so it is possible to make a large number of traveling gears using the spacious width of the aircraft. Although,
It has a compact and good design with a low height.

(g) Effects of the invention As explained above, according to the invention, since the speed change panel 9 is erected behind the engine 13 and above the mounting portion 18a of the handle frame 18,
A small tiller 11 mainly used in home gardens
Even in this case, the shift panel 9 can be constructed relatively large, the shift lever 1 can be operated with a generous stroke and according to the large display, and operability can be improved.

In addition, since the fuel tank 21 and transmission panel 9 cover the rear and upper part of the engine 13, parts such as the air cleaner 24 and cabana link at the rear of the engine are completely visible to the operator, although no special cover is required. prevent it from becoming
It is possible to improve the external design.

Furthermore, since the speed change panel 9 is used as a support for the fuel tank 21, it is possible to reduce the number of parts while maintaining a good design and to make the machine weigh more. Loading and unloading becomes easier, and usability can be improved.

[Brief explanation of the drawing]

Fig. 1 is an overall side view showing a tiller according to the present invention, Fig. 2 is a perspective view showing the main parts of its speed change operation device, Fig. 3 is a side view thereof, and Fig. 4 is Fig. 3-
FIG. 5 is a cross-sectional view taken along line FIG. 3. Further, FIG. 6 is a front view showing a guide groove of the speed change panel, and FIG. 7 is a front view showing a partially modified guide groove. 1... Gear shift lever, 9... Gear shift panel, 10...
... Guide groove, 11 ... Tiller, 12 ... Mission case, 13 ... Engine, 15 ... Wheel,
16...Rotary, 17...Handle, 18...
Handle frame, 18a...Mounting part, 19...
Engine frame, 21...Fuel tank.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) The engine is mounted on an engine frame fixed in front of the transmission case that constitutes the aircraft frame, and the engine is mounted diagonally above the transmission case.
In a tiller having a handle frame attached to the rear, a speed change panel having a guide groove is erected behind the engine and above the handle frame attachment part, and a fuel tank is further provided above the engine. The tiller is supported by the speed change panel, and the fuel tank and the speed change panel cover the rear and upper part of the engine. (2) The tiller according to claim 1, wherein the speed change panel guides one speed change lever for changing the traveling speed and the rotary rotation direction.