JPH04113504U - Tractor pulling a towed agricultural machine - Google Patents

Abstract

(57) [Summary] [Purpose] The turning radius was made small so that the tractor pulling the work equipment could easily be steered even in narrow spaces, and the structure was designed with no difference between the inner wheels. [Structure] A bending point at the time of turning is formed at an intermediate position between a rear wheel axle of a tractor and a wheel axle of a working machine towed by the tractor.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is suitable for trailers, wagons, vacuum cars, manual spreaders, etc. The present invention relates to a tractor that pulls a farming implement, and particularly relates to its connection structure.

0002

[Prior art]

Conventionally, there is a tractor that tows a towed agricultural machine as shown in FIG. 7 or 8. .

0003 The hitch 2 shown in FIG. 7 is installed near the rear wheels 1, 1 of the tractor. The structure is such that the traction rod 4 of the agricultural machine 3 to be towed is directly pulled by the traction lever 4. This structure The difference between the inner wheels of the tractor and the towed agricultural machine is large, so the turning radius is If it is made smaller, the rear wheel 1 of the tractor and the traction rod 4 will come into contact with each other. The turning radius becomes larger.

0004 In addition, the one shown in FIG. It is configured to pull the traction rod 4 of the industrial machine 3. Connection between drawbar 5 and traction rod 4 is performed via the alligator hitch 6, so the turning angle of the traction rod 4 with respect to the drawbar 5 is Has limits. Although the turning angle can be larger than the tractor pulling the work equipment in Figure 1, The turning radius becomes slightly smaller and the difference between the inner wheels becomes larger.

[0005] In addition, the work equipment described in Utility Model Publication No. 1-90309 is The wheels are configured to face in the opposite direction of the tractor's steering wheel. This work machine Although the inner ring difference is small, the turning angle is 9 because the link type drawbar and alligator hitch touch each other. It is not possible to cut the turning angle to 0°.

[0006]

[Problem that the idea aims to solve]

Towed agricultural machines are often used in narrow spaces such as orchards and greenhouses; In order to make work easier in places such as There is a need for a tractor that can pull a powerful working machine.

[0007] Therefore, with this invention, it is possible to turn with no difference between the inner wheels, and the tractor and the towed agricultural Tows towed agricultural machinery that can turn with the minimum turning radius without interfering with commercial machinery. The purpose of this project is to provide a tractor with a new design.

[0008]

[Means to solve the problem]

In order to achieve the above object, the present invention provides a rear wheel shaft of a tractor and a A bending point for turning is provided at an intermediate position between the wheel axle of the towed agricultural machine. It is characterized by

[0009]

[Effect]

Since the present invention has the above configuration, when turning the handle of the tractor, The turning radius from the center to the rear wheels of the tractor and the wheels of the towed agricultural machine are the same. Since it is long, there is no difference between the inner wheels when turning, and the turning angle is 90 degrees or more. This makes it possible to reduce the turning radius, making it easier to maneuver in narrow spaces. It's easy to do.

0010

【Example】

As shown in FIG. cormorant. ) is horizontal to the work equipment 11 on the lower link 12 attached to the rear of the tractor 10. It is towed by connecting a traction rod 13 attached so that it can freely turn in the direction. .

[0011] The tractor 10 has two pairs of wheels 14 and 15, and the working machine 11 has a pair of wheels at the rear. It is equipped with 16. The traction rod 13 is attached to the underside of the loading platform of the work machine 11 on the tractor 10. Freely pivotable in the horizontal direction to an intermediate position between the axis of the rear wheel 15 and the axis of the wheel 16 of the working machine installed on. That is, from the pivot axis of the traction rod 13 to the rear wheel of the tractor 10 15 and the axis of the wheel 16 of the working machine 11 from the pivot axis of the traction rod 13. The length B to the heart is equal.

0012 The mounting structure of the traction rod 13 is as shown in FIG. It is rotatably attached via a bush 21 around a pin 20 protruding from the bottom surface of the loading platform 1. This is what I added.

[0013] The connection of the traction rod 13 to the lower link 12 has the structure shown in FIGS. 4 and 5. ing. That is, the drawbar 23 is attached to the rear end of the bifurcated lower link 12. , a through hole 24 is bored in the center of the drawbar 23, and a through hole 24 is formed in the center of the drawbar 23. The connecting shaft 25 is inserted and fixed so that the connecting shaft 25 is inserted and fixed. The rearwardly protruding portion of the connecting shaft 25 Holes 26 penetrating vertically are formed at appropriate intervals in the front-rear direction.

[0014] A hollow collar 27 having the same axis is attached to the tip of the traction rod 13. The collar 27 has an inner diameter into which the connecting shaft 25 can be inserted. Also color 27 There is a window 29 above the rear end, and it is inserted into the hole 26 of the connecting shaft 25 inserted through the window 29. Pin 28 may be inserted. The pin 28 contacts the rear edge of the collar 27 and the connecting shaft 25 comes off. To prevent. By changing the insertion position of the pin 28, the dimension D in Fig. 1 can be adjusted. make a clause This is because the dimension of A changes depending on the dimension of C, which varies depending on the tractor. By adjusting the dimensions of A=B.

[0015] Although we have explained the case where the lower link 12 of the tractor is used, the hitch of the tractor Fig. 7 shows the case where . When using a hitch, attach 1 tow rod to the hitch 30. 3 is connected with a hitch pin 31 that passes through it in the vertical direction. If you turn in a horizontal direction, you will not be able to tow the work equipment, so please use the traction rod 1 to prevent it from turning. A pair of stoppers 32 protrude from the ends of the hitch 30 to hold the hitch 30 from the left and right sides. It was established.

[0016] It is desirable that A=B be accurate, but even if A=B is not true, it is possible that between A and B. It is possible to implement it even if it is near the intermediate point.

[0017] Since the present invention has the above configuration, as shown in FIG. When the machine cuts a curve, the work equipment 11 turns around the bending point E and follows the curve. However, because of the relationship A=B, there is no contact between the tractor and the work equipment, and only However, since there is no inner difference between the rear wheels of the tractor and the wheels of the work equipment, the tractor's turning The radius becomes smaller.

[0018] Furthermore, even if you turn the tractor handle so that the turning angle exceeds 90 degrees, As shown, the turning radius can be reduced.

[0019] In addition, in Fig. 3, X is the occupied width necessary for turning the tractor, and Y is the width of the towing vehicle. Indicates the necessary width for turning.

[0020]

【effect】

Since the present invention has the above configuration, the turning radius is small and there is no inner race difference. This makes it difficult to work in narrow greenhouses, in orchards with trees, or when driving on narrow farm roads. The tractor can be easily pulled, and even when towing the work equipment, the tractor can be turned with minimal rotation. It is possible to turn with the turning radius, and there is no difference between the inner wheels, so if there is enough width for the tractor to pass through, the work can be done. It is also possible to pass by towing a plane (same width as a tractor).

[0021]

[Brief explanation of drawings]

[Fig. 1] Fig. 1 is a side view of the present invention;

[Fig. 2] Fig. 2 is an explanatory diagram of the turning state of the present invention;

FIG. 3 is an explanatory diagram of the turning state of the present invention;

[Fig. 4] Fig. 4 is a plan view of the connection structure between the lower link and the traction rod of the present invention;

[Fig. 5] Fig. 5 is a longitudinal cross-sectional side view of Fig. 4;

[Fig. 6] Fig. 6 is a partially longitudinal side view showing the turning portion of the traction rod;

FIG. 7 is a plan view of a connection structure between a traction rod and a hitch in another embodiment of the present invention;

FIG. 8 is an explanatory diagram showing a turning state of a tractor towing a conventional working machine;

FIG. 9 is an explanatory diagram showing a turning state of a tractor towing a conventional working machine;

[Explanation of symbols]

10...Tractor 11...Work equipment 12...Lower link 13... Traction rod 15...Rear wheel 16... Wheels of work equipment E...Bending point

Claims (1)

[Scope of utility model registration request] 1. A towed agricultural working machine towed, characterized in that a bending point at the time of turning is provided at an intermediate position between the rear wheel axle of the tractor and the wheel axle of the towed agricultural working machine towed by the tractor. tractor.