JPS6135457Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a newly constructed pedal depressing device for a tractor that can be driven backwards.

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:

In order to solve these problems, the present invention provides a pedal device for a tractor that can be driven backwards, which connects a specific pedal at the rear of the tractor that is operated by stepping on it with the foot to a corresponding pedal at the front in a simple structure that can be operated with a light force, and when using the front pedal to drive forward, it is not linked to the rear pedal and has no subordinate relationship with it.

An embodiment 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 backward driving device that allows the tractor to be operated in a backward direction. It can be roughly divided into a pedal depressing device 2, a front wheel direction changing device 3, and a seat changing device 4 provided on the tractor 1, and the configuration thereof will be explained in detail below.

First, the configuration of the pedal depressing device 2 according to the present invention is as follows:
Consisting of left and right brake pedals 5, 5, an accelerator pedal 6, and a clutch pedal 7, which are activated by pressing the foot down, the positional relationship of these pedals is, for example, with the left and right brake pedals 5, 5 and the accelerator pedal on the right side when facing rearward. 6 and a clutch pedal 7 are provided on the left side, and these pedals 5, 5,
6 and 7 are configured to operate in conjunction with respective pedals 8, 8, 9, and 10 located at the front.

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 support 23 hanging from the bottom 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 the link 28 is attached to the supports 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 the pedal depressing device 2 having such a configuration, when the clutch pedal 7 is depressed, the pedal 7 is pressed against the pin 14.
The arm piece 16 moves downward as shown by the two-dot chain line in FIG.
0 is connected to link 2 by pulling it toward pedal 7.
8 is tilted to the left, and the crank 33 is moved downward in a clockwise direction, so that the extension member 38, which comes into contact with the crank 33 and whose protrusion 34 is engaged, moves in the same direction to push the front clutch pedal. 10 enables the same effect. On the other hand, when driving forward, even if the front clutch pedal 10 is depressed, the stay 35 will not be attached to the support 3.
It moves downward using the pin 39 of 7, 37 as a fulcrum, and since it is not driven by the crank 33, it does not move in conjunction with the clutch pedal 7 at the rear, and this pedal 7 does not maintain a downward movement state, and the pedal 7 is activated. It's something you don't do.

Further, as described above, the tubed wire 19 has its screw fitting 26 pivotally supported via the member 25 and the support 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.

The pedal depressing device 2 of the present invention has been described above, but since the front wheel direction changing device 3 and the seat changing device 4 are required to drive the tractor 1 backward, the configuration thereof will be explained for reference.

First, the front wheel direction changing device 3 will be explained. This direction changing device 3 is a steering wheel rotating device 4 provided on an existing steering wheel 40 as shown in the first figure.
1. A direction change lever device 42 provided next to the seat and a limit switch 43 provided at both ends of the front wheel.
It is divided into 44 parts.

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. That is, the sprocket 49 is assembled via the brackets 48, 48, etc. which are attached to the spiders 47, 47, ... of the handle 40, and the sprocket components 46, 46, ..., which are divided into a plurality of parts, are assembled to the steering shaft 50 of the handle 40. handle 40
It is clamped with sprocket 49 so that it forms a concentric circle. Reference numeral 51 denotes a reducer located in front of the handle 40. This reducer 51 is placed together with the motor 45 on a plate 52 provided in front of the handle 40, and this plate 52 is connected to the tractor 1 as shown in the figure. It is attached to a frame body 53 via a member 54 with bolts 55 and nuts 56. The reduction ratio of this reducer 51 is set to a rotation speed that allows the handle 40 to be turned at the speed of a human hand, and a sprocket 58 is attached to the upper end of the output shaft 57.
A roller chain 59 is connected to the sprocket 49 and the sprocket 49.
The speed reducer 51 is provided with a dog clutch 60, etc., 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 is rotated in forward and reverse directions, and its rotational speed can be varied. In other words, as shown in FIGS. 7 and 8, the tractor 1
A fan-shaped insulating plate 64 is attached to the upper end of an insulating plate-like body 63 that is erected on a mounting frame 62 fixed to a frame of
Two upper and lower conductive plates 6 are arranged symmetrically on this insulating plate 64.
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. It is installed, and this fitting tool 71
The base end of the lever 75, whose upper end protrudes from the opening 74 of the cover 73, is attached to the brackets 76, 76.
is pivotally supported via a pin 77. Reference numeral 78 denotes a large gear attached to the fixed shaft 70, and a small gear 81 attached to a shaft 80 on which a power-type wire-wound variable resistor 79 provided on the insulating plate-like body 63 is arranged is meshed with the large gear 78. The rotation angle of the lever 75 is transmitted to the terminal 82. This terminal 82 is attached to the shaft 80 via an insulating spacer 83, and is configured so that the resistance becomes smaller as the lever 75 moves toward either the left or right end, thereby changing the voltage of the motor 45. The number of rotations can be varied.
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
When you release your hand from lever 75, this lever 75
is always maintained at a neutral position by a pair of leaf springs 85, 85 attached via a member 84 provided on the mounting frame 62 so as to cut off the voltage of the motor 45. It is possible to drive.

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 manner, the direction change lever device 42 allows the handle 40 to be rotated in a predetermined direction by operating the lever 75, thereby making it possible to easily change direction.

In addition, to explain the seat change device 4, 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 driving forward-facing, this mounting plate 93 is engaged with L-shaped metal fittings 95 and 96 divided into one or more parts facing the guide plate material 94, the small holes of the mounting plate material 93 and the guide plate material 94 are aligned, and the pin 97 is inserted into this small hole. The seat 90 is fixed forward by inserting it.

Furthermore, when driving backwards, support plate material 9
An auxiliary seat 101 is constructed with a plurality of leg pieces 100, 100, .
Engage the mold fittings 102 and 103 with the pin 93, align the small holes of the support plate 98 and the mounting plate 93, and insert the pin 104.
At the same time, the lower support plate 99 is engaged with the L-shaped metal fittings 95, 96 of the guide plate 94, the small holes are aligned, and the seat 90 is fixed rearward by inserting the pin 105. . As described above, the seat change device 4 has the advantage of being able to change the seat to the required orientation when driving forward or backward.

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.

If the present invention is a pedal depressing device for a backward driving device having the above configuration, the following effects can be achieved.

By stepping on the rear pedals 5, 6, and 7,
By moving downward using the pin 14 as a fulcrum, the arm piece 16 descends, the wire 20 pulls the pedal 5, etc., the link 28 tilts to the left, and the crank 33 moves downward, so that the link 28 The extension member 3 is in contact with the extension member 3 and the protrusion 34 is engaged with the extension member 3.
8 is driven in the same direction and the front clutch pedal 10
There is an advantage that the pedal 10 can be operated in a downward motion state, and a predetermined pedal 10 etc. can be operated by backward operation.

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

Further, since the tubed wire 19 has a screw fitting 26 pivotally supported via a member 25 and a support 23 via a pin 24, even if the wire 20 is in tension due to the operation of the pedal 7. This 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. The pedal 7 only needs to be pressed down with a light force, and the nut 21,
21 has great practical effects, such as being able to arbitrarily adjust the tension of the wire 20.

Note that embodiments other than the present invention are not limited to the above description.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of a tractor equipped with the present invention, Fig. 2 is a side view of a pedal depressing device according to the present invention, Figs. 3 and 4 are front views of each main part, and Fig. 5 is a handle. FIG. 6 is a schematic plan view of the rotating device, FIG. 6 is a sectional view thereof, FIG. 7 is a schematic front view of the direction change lever device, FIG. 8 is a partially cutaway side view of the same, FIG. 9 is an electric circuit diagram of the same device, and FIG. Figure 10 is an operational diagram showing the state in which the tractor changes direction to the left side, Figure 11 is an electrical circuit diagram explaining the same operation, Figure 12 is a front view when the seat is installed facing rearward, and Figure 13 is the same side view. FIG. 14 is a side view of the seat facing forward. 1...Tractor, 19...Tube wire.

Claims (1)

[Scope of utility model registration request] Brake, accelerator, clutch, etc. pedals 5, which are necessary for driving operations, are mounted rearward on the rear of the tractor 1.
6 and 7 pivot the ends of each stay 13 to supports 12 and 12 suspended from the footboard 11, and have springs 15 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
2 are screwed together with the screw stops 26 of the support 23 vertically installed on the footboard 11, and the other end of each tubed wire 19 is connected to the support 31 installed vertically on the frame 30 of the tractor 1. , 31, and 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 backward-facing pedals 5, The stays 35 of the front pedals 8, 9, 10 corresponding to the pedals 6, 7 are connected to the front foot pedals 36.
The extension member 3 is pivotally supported on the support portions 37 vertically provided on the support portion 37, and has a proximal end attached to each stay 35.
8 to the lower surface of the crank 33,
A pedal depressing device for a tractor capable of backward operation, which is configured such that the distal end portions of each of these extension members 38 engage with the protrusions 34, respectively.