JPH0441764Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Industrial Field of Application] This invention relates to a rear hitch mounting mast that is installed on a rotary tiller in order to connect rear equipment such as a tail wheel, a ridge grower, a mulching device, etc. to the rotary tiller. [Prior Art] Conventionally, as a rear hitch mounting mast for this type of rotary tilling device, the one described in Japanese Utility Model Application Laid-open No. 57-104804 is known. Therefore, the one described in this publication is generally called the 2P type,
As described in this publication, especially in Figure 1, a mounting plate is fixed to the main beam, the front end of the frame is pivotally connected to the mounting plate, and the lower end is further pivotally connected to the mounting plate. The mast, which protrudes upward, has a straight shape when viewed from the side, but its upper part protrudes slightly backward, so that when the work equipment is lifted, the mast will not touch equipment placed behind the driver's seat. The upper part is formed to prevent collision.

[Problem that the idea aims to solve]

With the conventional 2P type mentioned above, if equipment such as a fuel tank is installed in the space behind the driver's seat of the towing machine, the top of the mast will be tilted backwards even when the rotary tiller is lifted. Therefore, the mast will not collide with equipment such as the fuel tank. However, in the working position without lifting the rotary tiller, the top of the mast is too far back from the driver's seat, so the operator must use the tilling depth adjustment mechanism installed at the top of the mast to adjust the vertical position of the rear hitch. It is very difficult to keep my hands off my seat.
In addition, since the front end of the plowing depth adjustment frame (equivalent to a rear hitch) is directly pivoted to the mounting plate, a long frame is used, which increases costs. Since the pivot portion of the plowing depth adjusting frame is located at a low position, if the plowing depth adjusting frame is lowered extremely, the plowing depth adjusting frame may interfere with the rotary portion. Therefore, the present invention not only prevents the rotary tiller from colliding with equipment behind the driver's seat using the mast when the rotary tiller is lifted, but also prevents the operator from lifting the rotary tiller from the driver's seat. , the plowing depth adjustment mechanism provided at the top of the mast can be easily reached, the rear hit does not interfere with the rotary part even when the rotary tilling device is extremely lowered, and the length of the rear hit is made as short as possible. In order to obtain a rear hitch mounting mast for a rotary tiller that can contribute to cost reduction, a technical problem arises that must be solved, and the present invention aims to solve this problem.

[Means to solve the problem]

This invention was proposed to achieve the above object, and the hit part of the connecting rod extending forward from the gear box of the rotary tiller is connected to the rear hit pin of the traction machine, and the work equipment lifting mechanism A rotary tilling device is installed so that it can move up and down around a hitch pin, and a mast is erected on the top of the gear box in order to mount the upper part of the vertical position adjustment mechanism of the rear hitch that protrudes rearward from this rotary tilling device. In a rotary tiller, a mast 9 is formed into an L-shape in side view, and its front end is attached to a gearbox 2, and the upper rear end of the mast 9 and the rear part of the connecting arm rods 3, 3 are connected to a stay 13. ,1
3, and the stays 13, 13 are connected in a backward tilted position so that the lower part is the front part and the upper part is the rear part, and the stays 13, 13 are connected in a backward tilting position at the middle part of the stays 13, 13. Rear hitch 17,1
To provide a rear hitch mounting mast for a rotary tiller, characterized in that the front ends of vertical rods 18, 18 of No. 7 are pivotally connected by pins 20. [Embodiment and operation] Next, one embodiment of this invention will be described based on the drawings. FIG. 1 shows the lifted state, FIG. 2 shows a side view of the working state, and FIG. 3 shows a perspective view of the state before connection. The bases of the connecting arm rods 3, 3 are fixedly attached, and a traction machine 4 is attached to the front part of the connecting arm rods 3, 3.
Lift rods 7, 7, which are pivotally connected to the rear of the connecting arm rod 3, are connected to the lift arms 8, 7 of the hydraulic lifting mechanism of the traction machine 4. 8, the vertical position of the rotary tiller 1 can be freely adjusted by lifting and rotating the lift arms 8, 8. A rear hitch mounting mast 9, which has an inverted L-shape in side view and has an upright portion 9a and a lateral portion 9b, is attached to a bracket 10 provided at the top of the gearbox 2.
b, 9b are connected by a pin 11 to form a connecting arm rod 3,
Upright portions 9a, 9a are connected to the rear portions of the pins 13, 13 by pins 12, 12, respectively.
4 and 14, the upright portion 9
a, 9a are fixed to the gearbox 2 so that they are behind the lateral parts 9b, 9b, and when the rotary tiller 1 is hoisted sufficiently high as shown in FIG. However, since the upright portions 9a, 9a are located at the rear of the lateral portions 9b, 9b, equipment such as a fuel tank or a fender installed on the towing machine 4 at the rear position of the driver's seat 15 may be The mast 9 is prevented from colliding with the mast 16. The illustrated rear hitch 17 is
Left and right vertical rods 18, 18 and horizontal rod 1 made of pipes
The front parts of the vertical rods 18, 18 are pivotally connected to the lower part of the stays 13, 13 with pins 20, 20, and the upper part of the mast 9 is connected with a pin part 21a. The upper part of the adjusting threaded cylinder 22 is rotatably fitted into the pivotally mounted bearing 21, and when the adjusting screw cylinder 22 is rotated by the handle 23, the vertical position where the threaded rod 24 moves in and out of the adjusting screw cylinder 22. The lower part of the threaded rod 24 is connected by a pin 27 to arms 26, 26 formed in the adjustment mechanism 25 and fixed to the horizontal rod 19, and the rear hitch 17 is centered around the pins 20, 20 by the vertical position adjustment mechanism 25 The rear hitch 17 is equipped with, for example, a tail wheel,
The ridge grower, mulching device, etc. are set by inserting and fixing respective mounting rods into the rear portions of the vertical rods 18, 18. Rotary tillage device 1
The top of the tiller 28 is covered with a rotary cover 29, and the rear is covered with a rear cover 30, and the rear cover 30 is suspended from the rear hitch 17 by adjusting screws 32, 32 with springs 31. .
Further, reference numeral 33 is a fender, and reference numeral 34 is a pin that prevents the hit portion 6 from coming off from the hit pin 5. [Effects of the invention] The rear hitch mounting mast according to this invention is constructed as described above, and the mast 9 erected above the gearbox 2 is connected to the rotary tilling device 1.
When viewed from the side, the upright part 9a is located behind the side part 9b so as not to come into contact with the equipment 16 near the rear of the driver's seat 15 of the towing machine 4 when the machine is in a highly suspended position. Since it is configured in an approximately inverted L shape, when the rotary tiller 1 is lifted sufficiently high,
Since the concave portion of the joint between the horizontal portion 9b and the upright portion 9a of the mast 9 approaches the equipment 16, the mast 9 can sufficiently approach the equipment 16, thereby allowing rotary tilling. The apparatus 1 can be hoisted to a sufficiently high height. Moreover, since the upper part of the vertical position adjustment mechanism 25 of the rear hitch 17 is attached to the upper part of the upright part 9a, the upper part of the vertical position adjustment mechanism 25 does not move too far from the driver's seat 15 when the rotary tiller 1 is in the working position. Because there is nothing to do,
Adjust the vertical position of the rear hitch 17 from the driver's seat 15.
It can be done from Furthermore, mast 9
As the strength of rear hitches 17, 17 increases,
Since the pivot position of the front end of the vertical rods 18, 18 can be shifted rearward, it is possible to shorten the length of the vertical rods 18, 18, contributing to cost reduction. Since the pivot joints of the vertical rods 18, 18 are provided at the intermediate portions of the stays 13, 13, the positions of the pivot joints are high, and therefore, when adjusting the plowing depth of the rotary section, the vertical rods 18, 18 Since there is no interference between the rotary section and the rotary section, the plowing depth adjustment range is widened, and this is a device with various practical values.

[Brief explanation of the drawing]

The figure shows one embodiment of this invention.
The figure is a side view of the main part, and FIG. 3 is a perspective view before connection. Description of symbols, 1... Rotary tilling device, 2... Gearbox, 3... Connecting arm rod, 4... Traction machine, 5
...Hit pin, 6...Hit part, 9...Mast, 9a...Upright part, 9b...Side part, 15...Driver's seat, 17...Rear hitch, 25...Vertical position adjustment mechanism.

Claims (1)

[Scope of utility model registration request] A hit part of a connecting rod extending forward from the gearbox of the rotary tillage device is connected to a rear hitch pin of the traction machine, and the rotary tillage device is provided so that it can be rotated up and down around the hitch pin by a working machine lifting mechanism, In order to mount the upper part of the vertical position adjustment mechanism of the rear hitch that protrudes rearward from this rotary tiller, the mast 9 is formed into an L-shape in side view in a rotary tiller in which the mast is set up on the upper part of the gearbox. The front end of the mast 9 is attached to the gearbox 2, and the upper part of the rear end of the mast 9 and the rear part of the connecting arm rods 3, 3 are connected by stays 13, 13, with the lower part of the stays 13, 13 being the front part, The vertical rods 1 of the rear hits 17, 17 are connected in a rearward tilted position so that the upper part is the rear part, and extend rearward at the middle part of the stays 13, 13.
A rear hit mounting mast for a rotary tiller, characterized in that the front end portions of the wheels 8 and 18 are pivotally connected by a pin 20.