JPS6228508Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a backward driving device with a novel configuration for driving a tractor backward.

Generally, when working with various types of work machines attached to a tractor, or when working with a work machine such as a seedling transplanter attached to the rear of the machine, the driver keeps his body facing forward and occasionally checks the transplanting status of the seedlings. The driver must turn his/her head toward the rear for inspection, which can cause driver fatigue and driving accidents, hindering work efficiency. For this reason, conventionally, a backward tractor driving device has been developed in which the tractor is operated while facing backward. However, with this backward driving device, a pulley is installed at a predetermined position with a wire rope interposed between each tractor to be attached to rotate the handle that changes direction left and right. The configuration is complicated because the existing front handle is rotated, and once this backward drive device is assembled, the rear handle also moves when driving from the front, making it difficult to operate the handle. There are structural defects such as:

This invention solves the above-mentioned drawbacks by installing foot-operated pedals and hand-operated direction change levers at the rear of the tractor, as well as providing a rear-facing seat so that you can always keep an eye on the work machine and its working status. It is an object of the present invention to provide a tractor backward driving device that enables efficient driving operations.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic perspective view of a tractor equipped with a tractor rearward driving device of the present invention. The device can be roughly divided into a device 2, a front wheel direction change device 3, and a seat change device 4, and the configuration thereof will be explained in detail below.

First, the configuration of the pedal depressing device 2 consists of left and right brake pedals 5, 5, an accelerator pedal 6, and a clutch pedal 7, which are activated by depressing the foot.
Regarding the positional relationship of these pedals, for example, the left and right brake pedals 5, 5 and the accelerator pedal 6 are provided on the right side when facing rearward, and the clutch pedal 7 is provided on the left side. The respective pedals 8, 8, 9, 10 located at the front of the conventional
The structure is linked to the

The specific structure is as shown in FIGS. 2 to 5, and since all the corresponding pedals are linked with the same structure, the clutch pedals 7 and 10 will be explained as an example. In the figure, 1
Reference numeral 1 denotes a foot treadle provided at the rear of the tractor 1, and a support 1 is provided at the rear end of the foot treadle 11 (when viewed toward the rear).
2 and 12 are vertically provided, and the end of the stay 13 of the clutch pedal 7 is pivotally supported at the lower end of the support 12 and 12 via a pin 14, and the vicinity of the upper end of the support 12 and the end of the stay 13 are Hang the spring 15 on the side,
It is configured to lift the clutch pedal 7. Reference numeral 16 denotes an arm piece that hangs downward from near the bent portion of the stay 13 of the clutch pedal 7, and has a mounting tool 18 pivotally supported at its lower end via a pin 17. 19 is a tubed wire that connects the clutch pedal 7 and the front clutch pedal 10;
A tension adjustment screw 22 having nuts 21, 21 is provided at one end of the wire 20, and the wire 20 is attached to the fixture 18, and the lower end of the hanging support arm 23 provided on the lower surface of the footboard 11 is attached to the adjustment screw 22. At this point, a screw stopper 26 provided on a member 25 which is pivotally supported via a pin 24 is screwed together.

On the other hand, the other end of the tubed wire 19 is
The other end of the wire 20 is attached to the lower end of the link 28 with a pin 29 via the mounting bracket 27, and the upper end of this link 28 is attached to the support arms 31, 31 erected on the frame 30 of the tractor 1. Further, one end of a crank 33 is pivotally supported on this pin 32, and the other end of the crank 33 is provided with a protrusion 34 on the side surface. The clutch 10 is pivotally supported via a pin 39 to the lower end of a support 37 which is suspended from the lower surface of the front foot plate 36 via its stay 35, and further has an extension whose base end is attached to the stay 35. The member 38 is in contact with the lower surface of the crank 33, and the tip of the extension member 38 is connected to the projection 34 of the extension member 38.
It is configured to engage with. Although the pedal depressing device 2 including the configuration of the clutch pedals 7 and 10 described above is not shown in the drawings, it is of course connected to a predetermined mechanism, and a detailed explanation thereof will be omitted.

With such a configuration, when the clutch pedal 7 is depressed, the pedal 7 moves downward using the pin 14 as a fulcrum, and the arm piece 16 descends as shown by the dotted chain line in FIG. When 20 is pulled toward the pedal 7 side, the link 28 is tilted to the left and the crank 33 is moved downward in the clockwise direction, so that the extension member 20 comes into contact with the crank 33 and the protrusion 34 of the extension member is engaged. 38 is driven in the same direction, the front clutch pedal 10 is brought into a downward movement state, and when the front clutch pedal 10 is depressed, a similar action is possible. Conversely, even if this front clutch pedal 10 is stepped on, the stay 35 moves downward using the pin 39 of the supports 37, 37 as a fulcrum, and since it is not driven by the crank 33, it does not move in conjunction with the rear clutch pedal 7. , since this pedal 7 does not maintain the downward movement state, the pedal 7 does not operate.

Further, as described above, the tubed wire 19 has its screw fitting 26 pivotally supported via the member 25 and the support arm 23 via the pin 24.
Even if the wire 20 is put into tension by operating the pedal 7, the screw fitting 26 rotates around the pin 24, and the wire 20 can always be kept in a straight state, thereby preventing damage to the wire 20. Moreover, there is an advantage that the pedal 7 can be depressed with a light force, and the tension of the wire 20 can be arbitrarily adjusted by means of the nuts 21, 21.

Next, the front wheel direction changing device 3 will be explained.
As shown in the first figure, this direction change device 3 is divided into a handle rotation device 41 provided on an existing handle 40, a direction change lever device 42 provided next to the seat, and limit switches 43 and 44 provided at both ends of the front wheel.

The handle rotation device 41 is shown in FIGS. 5 and 6.
As shown in the figure, the handle 4 is operated by a forward/reverse variable motor 45.
0 in the left and right directions, and is configured to be detachably attached to any existing tractor model. In other words, the sprocket components 46, 46, .
sprocket 49 through brackets 48, 48, . . . attached to spiders 47, 47, .
is assembled and fixed to the steering shaft 50 of the handle 40 with a sprocket 49 so as to be concentric with the handle 40. 51 is a reducer located in front of the handle 40, and this reducer 51 is connected to the motor 45.
It is also placed on a plate 52 provided in front of the handle 40, and this plate 52 is attached to the frame 53 of the tractor 1 via a member 54 with bolts 55 and nuts 56 as shown. The reduction ratio of the reducer 51 is set to a rotational speed that allows the handle 40 to be turned at the speed of a human hand. A sprocket 58 is attached to the upper end of the output shaft 57, and a roller chain is connected to the sprocket 58 and the sprocket 49. The reducer 51 has a dock clutch 60 installed therein, and is configured such that the rotational force of the motor 45 can be switched by a lever 61. Further, this motor 45 is configured to be variably rotated in forward and reverse directions by the direction changing lever device 42.

This direction change lever device 42 is connected to a battery 10 connected to the generator and starter motor of the tractor 1.
6, the motor 45 can be rotated in forward and reverse directions, and its rotational speed can be varied. That is, as shown in FIGS. 7 and 8, a fan-shaped insulating plate 64 is attached to the upper end of an insulating plate-like body 63 that stands up on a mounting frame 62 fixed to the frame of the tractor 1. Two upper and lower conductive plates 6 are arranged symmetrically on the left and right sides.
Terminals 67 and 68 that contact the left and right conductive plates 65 and 66 are connected to sliding pieces 72 provided on a fitting 71 fitted to a fixed shaft 70 via an insulating member 69. The proximal end of a lever 75, the upper end of which protrudes from the opening 74 of the cover 73, is pivotally supported on the brackets 76, 76 via a pin 77. 78 is the fixed shaft 7
This large gear 78 is fitted with a small gear 81 attached to a shaft 80 on which a power-type wire-wound variable resistor 79 provided on an insulating plate-shaped body 63 is arranged, and the rotation of the lever 75 is The angle is conducted to terminal 82.
This terminal 82 is connected to the shaft 8 through an insulating spacer 83.
0, and the lever 75 is configured so that its resistance decreases as it moves toward either the left or right end, thereby changing the voltage of the motor 45 and making it possible to vary its rotational speed. be. Furthermore, by moving the lever 75 in either direction, the polarity of the input voltage to the motor 45 can be switched. Moreover, it is important to note that when the lever 75 is released, the lever 75 is always in the neutral position and is mounted via a member 84 provided on the mounting frame 62 so that the voltage of the motor 45 is cut off. A pair of leaf springs 85, 85 are configured to maintain the neutral position, thereby enabling safe driving.

The limit switches 43 and 44 are respectively attached to both ends of a support rod 87 that supports the left and right front wheels 86, and when the front wheels 86 are completely bent in either the left or right direction and do not move any further, The limit switches 43 and 44 normally have closed contacts, and are attached to a steering wheel handle with one end attached to both ends of a connecting rod 88 and the other end attached to a support rod 87, respectively. When 89 is connected to the levers of limit switches 43 and 44, the contacts of limit switches 43 and 44 are opened, thereby cutting off the current transmitted to motor 45 and forcing motor 45 to stop. Also, lever 7
5 in the opposite direction, the polarity of the voltage applied to the motor 45 is reversed, the front wheel 86 rotates in the opposite direction, and the steering arm 89 switches the limit switches 43, 44.
The front wheel 86 rotates until it joins the lever.

Now, to explain this example, Figures 10 and 11
The illustrated example shows a case of turning to the left.
In other words, when lever 75 is tilted to the left, handle 4
The motor 45 rotates clockwise so that
rotates, the front wheels 86, 86 rotate to the right when viewed from the forward direction, and the tractor 1 can rotate to the left. In this way, the direction change lever device 42 allows
By operating the lever 75, the handle 40 is rotated in a predetermined direction, making it possible to easily change direction.

Next, the seat change device 4 will be explained. A reinforcing member 91 is attached to the bottom of the seat 90, and a mounting plate 93 is attached to this via a plurality of members 92, 92, . . .
When mounted and driven forward, the mounting plate 93 is engaged with L-shaped fittings 95 and 96 divided into one or more pieces facing the guide plate 94, respectively,
The small holes in the mounting plate 93 and the guide plate 94 are aligned, and a pin 97 is inserted into the small hole to fix the seat 90 forward.

Furthermore, if you drive backwards, forward-facing seats 9
If you change 0 to rearward facing, this seat 90
There is no distance between the footboard 11 and the pedals 5, 6, and 7, and the rear of the tractor 1 includes a three-point lower link, which will be described later, making the driver's feet uncomfortable.

To solve this problem, the seat 90 is fixed at a high position only when driving backwards.
The configuration is such that the driver can easily place his or her feet on the footboard 11 or depress each of the pedals 5, 6, and 7 with plenty of time. In other words, an auxiliary seat 101 is constructed with a plurality of leg pieces 100, 100, . ，
103 with the mounting plate 93 of the seat 90, align the small holes of the support plate 98 and the mounting plate 93, and insert the pin 1
04, the lower support plate 99 is engaged with the L-shaped fittings 95, 96 of the guide plate 94, the small holes are aligned, and the seat 90 is fixed backwards by inserting the pin 105. It is. In the case of forward-facing driving, the seat 90 is facing forward,
It is advantageous that the seat 90 can be fixed at a normal height position and, conversely, in the case of rearward-facing driving, the seat 90 can be fixed rearward at a position higher than this height.

In the figure, 107 is an electric wire, 108 is a lower link of a three-point link as a mounting device for the tractor 1, and 10
9 indicates a top link, and 110 indicates a rear wheel.

With the above configuration, the present invention has the following effects.

The pedal depressing device of the present invention includes rear pedals 5,
When you step on 6 and 7, it moves down using pin 14 as a fulcrum,
As the arm piece 16 descends, the wire 20 pulls the pedals 5, . . . , and the link 28 tilts to the left. On the other hand, as the crank 33 moves downward, the extension member 38 which comes into contact with the link 28 and whose protrusion 34 is engaged is driven in the same direction and operates the front clutch pedal 10 in the downward movement state. By backward operation, a predetermined pedal 1,...
This enables the operation of

In addition, when driving forward, when the front clutch pedal 10 is depressed, the stay 35 is moved from the support 3.
Since it only moves downward using the pins 39 of 7 and 37 as fulcrums and has no driven relationship with the crank 33, it is not interlocked with the clutch pedal 7 at the rear, allowing forward driving.

Further, since a screw fitting 26 is pivotally supported on the tubed wire 19 via a member 25 and a hanging support arm 23 via a pin 24, the wire 20 is placed in a tensioned state by operating the pedal 7. Also, this screw fitting 26 rotates around the pin 24, so that the wire 20 can always be kept in a straight state, thereby preventing damage to the wire 20, and pressing the pedal 7 requires only a light force. This has the advantage that the tension of the wire 20 can be arbitrarily adjusted by the nuts 21, 21.

Next, the front wheel direction changing device of the present invention rotates the motor 45 in forward and reverse directions by operating the lever 75.
Since the front wheel 86 can be moved left and right to change direction in a predetermined direction, the operation is much smoother than in the conventional example.Moreover, since the motor 45 is used to rotate the handle 40, it is possible to change the direction by wiring the electric wire. Often, the mounting method is extremely simple and produces other effects.

In addition, the seat change device of the present invention can fix the seat 90 at the normal height when driving forward, and when driving backward, the seat 90 can be fixed at a higher height than the normal height so that the driver's legs have more room. Since the seat 90 can be fixed at a high position, the height of the seat 90 can be easily changed depending on the driving direction.

In this way, the tractor backward driving device of the present invention has the following features:
This eliminates the drawbacks of the conventional example, and includes a pedal depressing device,
The three devices, the front wheel direction change device and the seat change device, are organically integrated, and have the effect of enabling efficient rearward driving operations while constantly monitoring the work machine and work situation.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of the present invention, Fig. 2 is a side view of the pedal depressing device, Figs. 3 and 4 are front views of each main part, Fig. 5 is a schematic plan view of the handle rotation device,
FIG. 6 is a sectional view of the same, FIG. 7 is a schematic front view of the direction change lever device, FIG. 8 is a partially cutaway side view of the same, and FIG.
The figure is an electric circuit diagram of the device, Figure 10 is an explanatory diagram of the operation when the tractor turns to the left, and Figure 11 is
12 is a front view of the seat when the seat is installed facing backwards, FIG. 13 is a side view of the same, and FIG. 14 is a side view of the seat facing forward. 1... Tractor, 2... Pedal device, 3...
Front wheel direction change device, 4... Seat change device.

Claims (1)

[Scope of utility model registration request] Brake, accelerator, and clutch pedals 5, which are necessary for driving operations, are mounted rearward on the rear of the tractor 1.
6 and 7 are pivotally supported by supports 12 and 12 which are hung from the footboard 11 at the end of each stay 13, and springs 15 are interposed between each stay 13 and the supports 12 and 12, respectively. A tubed wire 19 is connected to the lower end of each arm piece 16 hanging near the bent portion of the stay 13 via a tension adjustment screw 22 having nuts 21, 21 at one end so that the tension can be adjusted. Each of these tension adjustment screws 2
The screw stops 26 of the hanging support 23 provided on the footboard 11 are screwed into the support arms 31 and 2 of the tubed wires 19, respectively. A crank 33 having a protrusion 34 on the side surface of the other end is pivotally supported on each of these connecting portions, and each of the rearward-facing pedals 5, 6 , 7 and the corresponding front pedals 8,
The stays 35 9 and 10 are each pivotally supported by a support 37 hanging from a front foot plate 36, and an extension member 38 having a proximal end attached to each stay 35 is brought into contact with the lower surface of the crank 33, respectively. , the pedal depressing device 2 configured such that the tips of these extension members 38 engage with the protrusions 34, respectively, and the existing handle 40 for operating the front wheel 86 by a sprocket 49 consisting of a plurality of divided sprocket components 46. A motor 4 that is variable in forward and reverse directions and has a reducer 51 that is attached concentrically to the handle 40 and operates the handle 40.
5 is connected to the battery 106 connected to the starting motor of the tractor 1 by the lever 61 of the direction change lever device 42, and the limit switches 43 and 44 provided at the front wheel are activated when the steering arm 89 comes into contact with the A tractor rearward driving device comprising a front wheel direction changing device 3 configured to stop a motor 45, and a seat changing device 4 configured to install a seat 90 rearward by interposing an auxiliary seat 101.