JPS632333Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a mobile agricultural machine that can freely move forward and backward, with a handle rod that can be rotated 180 degrees between the front side and the rear side of the machine body. In other words, the working equipment such as the tiller is placed at the rear of the transmission case in the center of the machine, and the handle rod is placed at the rear of the machine.
In addition to various tasks carried out in the forward posture of a typical power tiller, in which the operator is located behind the tiller, the handlebar can be rotated 180 degrees with the implement, such as a seeder, placed in front of the transmission case (i.e. in the forward position of the machine). This invention relates to a mobile agricultural machine in which the operator is positioned in front of the engine and can carry out seeding work, etc. in a backward position, as opposed to the forward position described above.

The present invention aims to share some parts of the speed change operation mechanism for the forward and backward movable agricultural machine with the speed change operation mechanism for general mobile agricultural machines in the above-mentioned forward and backward movable agricultural machine, thereby reducing parts costs. The purpose is to reduce the

As a technical idea to achieve the above purpose, there is a prior application, Utility Model Application No. 55-56731 (Utility Model Application No. 56-157126) titled "Walking Type Mobile Agricultural Machine". The prior art relates to a forward and backward movable agricultural machine whose handle can be changed between forward and backward directions, and in which two types of extension operating tools can be attached and detached from the speed change operating tool via a connecting part. However, the operating method can be changed to hand or foot by replacing the extension operating tool.

Therefore, although two types of speed change operation means are disclosed that share a speed change operation tool, the speed change operation device of a mobile agricultural machine that can freely move forward and backward is adapted to two types of use modes: forward facing and backward facing. It does not disclose a speed change operation means.

The present invention provides a transmission device for a forward-reverse mobile agricultural machine by attaching a second speed change lever in order to accommodate the two types of use modes (forward and backward) of the speed change operation means as the above-mentioned forward-reverse mobile agricultural machine. The objective is to be achieved by constructing a transmission system and using parts for common mobile agricultural machinery. That is, the present invention makes the shift lever of the shift operation mechanism of a general mobile agricultural machine detachable, and the shift shifter 11 is attached to the transmission case 1 by the pivot mechanism 16.
The operation part of the speed change shifter 11 can be freely rotated vertically and horizontally by being supported through the support tube, and the second rotating plate 22 is integral with the supporting cylinder 21 and the first rotating plate 20 is integral with the mounting cylinder 19. A connecting body 17 is provided, the base of which is pivotally supported by the support cylinder 21, so that it can be freely rotated in the front-rear direction, and its attachment direction can be changed between forward and rearward. A second shift lever 18 is provided which is freely movable, and the mounting cylinder 19 of the connecting body 17 is detachably attached to the operation part of the shift shifter 11, and the second shift lever 18 is provided in place of the shift lever 12 which projects rearward from the handle base 7. By making the lever 18 freely replaceable above the handle base 7 via the connecting body 17, a speed change operation device for a mobile agricultural machine that can freely move forward and backward is provided.

The following description will be made based on the embodiments shown in the drawings.

Figure 1 is a side view of a mobile agricultural machine to which the present invention has been implemented, and the transmission case 1, pair of left and right drive wheels 2, engine 3, transmission case 4, chassis 5, and tillage device 6 are the same as those of a conventional tiller. A handle base 7 is fixed to the upper part of the transmission case 1, and a base 9 of a handle rod 9 is attached to the handle base 7 via a chrysanthemum seat 8.
The handle bar 9 can be fixed to the handle base 7 in the forward direction, backward direction, or at a desired angle using a rotatable mounting fastener 10 to provide a mobile agricultural machine that can freely move forward and backward.

With reference to FIG.
A speed change lever 12 is detachably attached via a fastener 13 in the extending direction of 1a. 14 is the handle base 7
The gear lever 12 has an upper portion fixed to the rear end thereof.
This is a speed change guide plate having a speed change guide groove 15 that regulates the direction of movement of the gear shift guide plate. Reference numeral 16 denotes a ball support mechanism for supporting the speed change shifter 11 so as to be rotatable vertically and horizontally.

In the forward-reverse movable agricultural machine of the present invention, the shift lever 12 is removed from the above-mentioned mobile farm machine, and the connecting body 17 and the second shift lever 18 are attached.

Referring to FIGS. 2 and 3, the connecting body 17 is connected to the tightening tool 1 on the operating portion 11a of the speed shifter 11.
3, which is detachably attached to the mounting cylinder 19 and rotates integrally with the speed change shifter 11; A moving plate 20, a supporting cylinder 21 that rotatably supports the second shift lever 18, and a second rotating plate 22 having a U-shape in side view and having a portion 22a thereof welded W2 to the supporting cylinder 21. The first rotating plate 20 and the second rotating plate 22 are integrally welded to each other or made from a single iron plate, and the mounting cylinder 19,
First rotating plate 20, support cylinder 21, second rotating plate 22
are fixed to each other and integrated to form a connecting body 17.

Elongated holes 23 are provided at both end portions 20b of the first rotating plate 20.
is drilled in the long hole 23, and the side plate 7 of the handle base 7 is inserted into the long hole 23.
The screw 24 screwed into a is passed through the screw 24, and the screw 24 and the first rotating plate 20 are engaged with each other to support the first rotating plate while allowing it to move laterally within the range of the elongated hole 23.
The connecting body 17 is pivoted about the fulcrum 24.

The support cylinder 21 is connected to the base 18 of the second shift lever 18.
It has an enlarged inner hole 21b that forms a space G for inserting the spring 25 and the collar 26 between the inner peripheral surface of the through hole and the base 18a of the second shift lever 18. death,
A washer 27 is fixed to the lower end of the base 18a of the second shift lever 18, and a ring 28 is attached to the upper part of the base 18a.
are welded W3 and formed into a pair of left and right or front and rear protrusions 28a on a part of the lower surface of the ring 28, and the supporting cylinder 2
Two recesses 21a corresponding to the projections 28a of the ring 28 are provided on the upper surface of the ring 28, and the second operation lever 18 and the support cylinder 21 are connected by the engagement between the projections 28a and the recesses 21a. When the lever is in a fixed position facing forward or backward, the second operating lever 18 and the connecting body 17 are locked in the rotating direction.
to integrate.

When changing the forward/backward direction of the aircraft, the second
When rotating the operating lever 18, the base 18a of the second operating lever 18 is rotated against the spring 25.
By raising the recess 21a and the protrusion 28a
The second operating lever 18 can be freely rotated by releasing the lock from the second operating lever 18.

Reference numeral 29 denotes a guide shaft W4 welded to the mounting cylinder 19, which is located in the shape of an extension of the operating portion 11a of the speed change shifter 11, similar to the speed change lever 12.
Instead of the speed change shifter 11, it passes through a speed change guide groove (for example, H-shaped) 15 of a speed change guide plate 15.

An opening 30 is formed in the upper surface of the handle base 7, allowing the support cylinder 21 and the second rotating plate 22 to freely rotate in the front-rear direction and the left-right direction.

The second guide shaft 31 projects rearward from the base 18a of the second shift lever 18 in the forward mode, and passes through the shift guide groove 33 of the second shift guide plate 32 in the reverse mode. In contrast to the speed change guide groove 15 of the speed change guide plate 14, the speed change guide groove 33 does not have a high speed guide groove and has a ⊥ shape.

Figure 4 shows the difference between a general mobile agricultural machine and a forward/reverse mobile agricultural machine.
The handle base 7 having the opening 30 and the gear shift guide plate 15 are used (or the cover plate covering the opening 30 is excluded), and the connecting body 17 equipped with the second gear shift lever 18 is used instead of the gear shift lever 12 to operate the gear shifter 11. The second,
As shown in FIG. 3, the second shift lever 18 is movable vertically and horizontally.

As mentioned above, the speed change lever 12 and the speed change shifter 1, which are part of the speed change mechanism of a general mobile agricultural machine, protrude rearward from the handle base 7.
1 is removable, and a second body integral with the support cylinder 21 is provided.
The first rotating plate 2 is integrated with the rotating plate 22 and the mounting cylinder 19.
0 is provided, and the support cylinder 21
The base of the second mounting plate is pivotably supported on the upper part of the transmission case 1, and is rotatable in the front-rear direction, and its mounting direction can be changed between forward and rearward.
A gear shift lever 18 is provided, and the mounting cylinder 19 of the coupling body 17 is removably attached to the operation part of the gear shifter 11, and the second gear shift lever 18 is attached to the coupling body in place of the gear shift lever 12 that protrudes rearward from the handle base 7. 1
Since it can be freely attached to the upper part of the handle base 7 via the handlebar 7, when manufacturing a forward-reverse type mobile agricultural machine, a gear shift operation device that can be operated in forward and backward positions can be used as a part of the gear shift device of a general mobile agricultural machine. This has the effect of reducing manufacturing costs by making it a common component with the other parts.

[Brief explanation of the drawing]

FIG. 1 is a side view of a mobile agricultural machine that can move forward and backward according to the present invention. FIG. 2 is a side view showing the main parts of the gear shift operating device. FIG. 3 is also a plan view. FIG. 4 is a cross-sectional view of the main parts of a speed change operating device, which is a general mobile agricultural machine and has a conventional operating lever attached thereto. 1...Mission case, 7...Handle base,
9... Handle rod, 11... Speed shifter, 11
a...Operation unit, 12...Speed lever, 13...Tightening tool, 16...Pivot mechanism, 17...Connection body, 18
...Second gear shift lever, 19...Mounting cylinder, 20...
...First rotating plate, 21... Support cylinder, 22... Second
rotating plate.

Claims (1)

[Scope of utility model registration request] In the forward and backward movable mobile agricultural machine, a gear lever 12 is removably attached to the gear shifter 11 in the extending direction of the operation part of the gear shifter 11 protruding from the transmission case 1, and the gear shifter 11
is supported on the transmission case 1 via a pivot mechanism 16 so that the operation part of the speed change shifter 11 can be rotated vertically and horizontally, and the second rotating plate 2 is integrated with the support cylinder 21.
2, and a connecting body 17 that is integral with the mounting cylinder 19 and includes a first rotating plate 20, the base of which is pivotally supported by the support cylinder 21, so that it can freely rotate in the front and rear directions and can be turned forward and backward. A second gear shift lever 18 is provided above the transmission case 1, the mounting direction of which can be changed freely, and which is detachable.
A gear lever 12 that is detachably attached to the gear shifter 11 and projects rearward from the handle base 7.
A gear shift operating device characterized in that the second gear shift lever 18 can be freely replaced above the handle base 7 via the connecting body 17.