JPH0214481Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a hitch device in a lifting device mounted on a tractor.

(Prior Art) In order to easily load earth, sand, compost, etc. onto a trailer or manure spreader using a tractor, there is a device in which a lifting device is attached to the rear of the tractor via a three-point linkage mechanism.

In the above-mentioned elevating work device, a pair of left and right fixed guide frames equipped with elevating platforms are installed vertically, the lower portions of both fixed guide frames are connected by a connecting member at the rear, and the elevating platform is placed in the center between both fixed guide frames. A lift cylinder is installed vertically, the lower part of the lift cylinder is supported by a connecting member, and the lifting platform is equipped with a working part such as a fork or a bucket.

By the way, in the above-mentioned conventional device, the lifting work device is not equipped with a hitch, and after loading earth and sand or compost into a trailer or mania spretsuda, etc., when towing the trailer or mania spretsuda, it is necessary to
I had to remove the lifting device from the tractor and use the hitch at the rear of the tractor to tow it.

(Problem that the invention aims to solve) For this reason, when carrying out a series of tasks such as loading soil, compost, etc. onto a trailer or manya spreader, and towing these materials, it is necessary to take the trouble of attaching and detaching the lifting device. First, it has not been possible to easily perform the above series of operations efficiently and in a short time.

The purpose of the present invention is to provide a traction device for an elevating work device that can efficiently and easily carry out a series of tasks such as loading earth, sand, compost, etc. onto a trailer, manure spreader, etc., and towing these tasks in a short time. .

(Means for Solving the Problems) In order to achieve the above object, the present invention is characterized in that the connecting members 21 and 22 have a
A mounting bracket 52 that is U-shaped in side view and has a hitch 54 that opens rearward is attached to the lift cylinder 40.
A notch 57 is formed in the top wall portion 52a of the mounting bracket 52 from the rear side, into which the lift cylinder 40 is inserted.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes an agricultural tractor, which can be operated in both forward and backward directions. The tractor 1 has a vehicle body 4 consisting of an engine, a transmission case 3, etc., and a seat 5 and a steering device are movable between a forward driving position and a rearward driving position. Reference numeral 7 denotes a hydraulic device for lifting and lowering the working machine mounted at the rear of the transmission case 3, and has a pair of left and right lift arms 8. 10 is the rear wheel,
11 is a fender. 13 is a lifting device,
At the rear of the tractor 1, there is a three-point link mechanism 16 consisting of a top link 14 and a pair of left and right lower links 15.
The device can be raised and lowered freely via the As shown in FIGS. 2 and 3, the working device 13 has a pair of vertically installed left and right fixed guide frames 18, and the upper parts of both fixed guide frames 18 are connected to an upper connecting member 19 at a midway point in the vertical direction. are connected and integrated by a middle part connecting member 20 and a lower part by lower upper and lower connecting members 21 and 22, respectively. The top link 1 is attached to the intermediate connecting member 20.
4 are connected. Lower upper and lower connecting members 21, 2
2 consists of a square pipe with a vertically long rectangular cross section, and the openings on both sides of the pipe are covered. The lower upper and lower connecting members 21 and 22 are arranged horizontally in the left-right direction and are fixed to the rear surfaces of both fixed guide frames 18, and are connected to each lower link 15 on both left and right sides of these connecting members 21 and 22. A mounting bracket 23 is provided in a forwardly projecting manner. The upper surface of the lower upper connecting member 21;
Attachment plates 24 and 25, which also serve as reinforcement, are fixedly installed on the lower surface of the lower lower connecting member 22, respectively, over the entire length in the left and right direction.

Reference numeral 27 denotes a pair of left and right vertically installed movable guide frames, which are provided on each fixed guide frame 18 so as to be movable up and down.
The upper ends thereof are connected and integrated by a connecting member 28 or the like.

Reference numeral 29 denotes a lifting platform that can be raised and lowered with respect to the movable guide frame 27, and includes a pair of left and right support brackets 30.
, a guide roller 31 provided in each support bracket 30 and fitted in the movable guide frame 27 , and a pair of upper and lower finger bars 32 horizontally arranged by connecting the upper and lower ends of both support brackets 30 , respectively. It is equipped with

34 is a pair of left and right mounting frames, with both finger bars 3
A bucket 35 shown as a working part is provided on each of these mounting frames 34 so as to be movable and adjustable in the left and right direction.
The left and right sides are attached via attachment frames 36. The mounting frame 36 is pivotally supported on the mounting frame 34 by a horizontal shaft 37, and the bucket 35 is rotated around the horizontal shaft 37 by a cylinder 38 interposed between the frames 34 and 36. In addition, as a working part, Bucket 35
A pair of forks on the left and right may be used instead.

40 is a lift cylinder, both guide frames 18, 27
The lower end of the cylinder tube 41 is installed vertically upward at the center position between the left and right brackets 42, and the lower end of the cylinder tube 41 projects forward from the front surface of the center portion of the lower lower connecting member 22 in the left and right direction. It is pivotally connected by a pin 43. Further, a pair of left and right brackets 45 are provided below from the lower surface of the center in the left and right direction of the connecting member 28, and the piston rod 4 is connected between these brackets 45.
The upper end of 6 is pivotally connected by a pin 47. The lift cylinder 40 is controlled by a control device provided in the fender 11 or the like of the tractor 1.

48 is a sprocket, and one end of a chain 50 that is wound around a support shaft 49 between the upper parts of both brackets 45 is connected to the cylinder tube 41, and the other end is connected to the lifting table 29, thereby controlling the expansion and contraction of the lift cylinder 40. Therefore, the lifting platform 29 is driven up and down with respect to the movable guide frame 27, and the movable guide frame 27 is driven up and down with respect to the fixed guide frame 18.

Reference numeral 5 denotes a hitch device which is detachably provided on the lifting device 13 and is composed of a mounting bracket 52, a pair of left and right side plates 53, and a hitch 54.
4 is installed, as shown in Figure 1.
The lifting platform 29 equipped with the bucket 35 is lifted above the lower upper and lower connecting members 21 and 22.

The mounting bracket 52 has a U-shape in side view that opens rearward, and has a top wall portion 52a and a bottom wall portion 52b.
and a front wall portion 52c that connects the front end portions of these wall portions 52a and 52b. Mounting bracket 52
is externally fitted from the front side to the left and right center portions of the lower upper and lower connecting members 21 and 22 provided with the mounting plates 24 and 25, so that the front end portions of the top wall portion 52a and the bottom wall portion 52b are connected to each other. Mounting plates 24, 25 or each mounting plate 2
4, 25 and each connecting member 21, 22, the mounting bracket 52 is removably attached to the guide frame 18, 27 with a fixing member 56 such as a bolt or pin.
It is said to be more anteriorly protruding. A lift cylinder 4 is located in the center of the top wall portion 52a in the left-right direction.
A U-shaped notch 57 into which the 0 is inserted is formed from the rear side, so that the mounting bracket 52 and the lift cylinder 40 will not interfere with each other.

The left and right side plates 53 are fixedly attached to each side edge of the mounting bracket 52 except for the front part to avoid interference with the lower upper and lower connecting members 21 and 22 and the mounting plates 24 and 25.

The hitch 54 is U-shaped in side view with an opening in the front.
The mounting bracket 52 is fixed to the lower front wall portion 52c of the front wall portion 52c in the left-right direction central portion thereof, and a connecting pin 58 is vertically provided so as to be freely insertable and removable.

In addition, reference numeral 60 denotes a hitch device mounted on the tractor 1, including a hitch box 61 fixed to the rear lower surface of the transmission case 3 in a rearwardly protruding manner, and a traction rod 63 with a hitch 62 provided on the box 61 in a rearwardly protruding manner. Equipped with etc.

According to the embodiment configured as described above, when loading soil, compost, etc. onto a trailer, manure spreader, etc., the work is carried out with the hitch device 51 removed from the lifting device 13. According to
Loading soil, compost, etc. onto trailers, mania sprets, etc. can be easily carried out.

In this case, the lower upper and lower connecting members 21, 2
2, mounting plates 24 and 25 are fixed over the entire length in the left and right direction, and these connecting members 21 and 22 are reinforced to increase the connection strength of the lower part of both fixed guide frames 18. The acting force can be suitably received at the lower portions of both fixed guide frames 18.

After the above-mentioned loading work is completed, when towing a trailer, mania spreader, etc., as shown in FIG. The upper part of the lower part is lifted upward and is provided with mounting plates 24 and 25.
A hitch device 5 is attached to the lower connecting members 21 and 22 from the front side, and a trailer, mania spreader, etc. is connected to the hitch 54.

This allows the lifting device 13 to be moved from the tractor 1 to the lifting device 13.
The hitch device 51 can be used to tow a trailer, manure spreader, etc. without having to remove the hitch device 60 on the tractor 1 side. When carrying out a series of operations such as loading onto a spretzer and towing these, there is no need to take the trouble of attaching and detaching the lifting device 13, and the above series of operations can be carried out efficiently and easily in a short time. .

In the embodiment, the mounting plate was fixed over the entire length of the lower upper and lower connecting members in the left and right direction, but it is also possible to attach the mounting plate only to the center of the lower upper and lower connecting members in the left and right direction where the mounting bracket is attached. good. Alternatively, the lower portions of both fixed guide frames may be connected by a single lower connecting member.

(Effects of the invention) As detailed above, in the present invention, the lifting device is equipped with a hitch, so it is possible to load soil, compost, etc. onto trailers, mania spreaders, etc., and tow them. When performing work,
There is no need to take the trouble of attaching and detaching the lifting device, and the series of operations described above can be carried out efficiently and easily in a short time. In particular, in the present invention, a mounting bracket is provided at the center in the left-right direction of the connecting member, and has a hitch that is U-shaped in side view and opens rearward, and is protruded forward from the lift cylinder and can be freely attached and detached from the front side. Since the notch through which the lift cylinder is inserted from the rear side is formed in the top wall, even though the lift cylinder is installed vertically in the center between both fixed guide frames, the lower part of both fixed guide frames By using the lower connecting member that connects the lower part of the lift cylinder and supports the lower part of the lift cylinder, the hit can be attached to the left-right center of the connecting member with a simple structure, and the mounting bracket equipped with the hit can also be attached and detached. It's easy to do. The present invention has the various advantages mentioned above and is of great practical benefit.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is a sectional view taken along the line A-A in FIG. 1,
FIG. 3 is a sectional view taken along the line BB in FIG. 2. 1...Tractor, 13...Elevating work device, 16
... Three-point link mechanism, 18, 27 ... Fixed/movable guide frame, 21, 22 ... Lower upper and lower connecting members, 29
... Lifting platform, 40 ... Lift cylinder, 51 ...
Hitchi device, 52...Mounting bracket, 53...
Side plate, 54... hitch, 56... fixture, 57...
...Notch.

Claims (1)

[Scope of utility model registration request] This is a lifting device attached to a tractor 1, in which a pair of left and right fixed guide frames 18 provided with a lifting platform 29 are installed vertically, and the lower portions of both fixed guide frames 18 are connected at the rear by connecting members 21, 22, and both fixed guide frames 18 are connected vertically. Fixed guide frame 1
A lift cylinder 40 for raising and lowering a lifting platform 29 is installed vertically in the center of the space between 8 and 8, and the lower part of the lift cylinder 40 is supported by a connecting member 22.In the center of the connecting members 21 and 22 in the left-right direction, an opening is provided at the rear. A mounting bracket 52 is provided with a hitch 54 which has a U-shape when viewed from the side and is protruded forward from the lift cylinder 40 so as to be detachable from the front side.
A hit device in an elevating and lowering work device, characterized in that a notch 57 through which a wire is inserted is formed from the rear side.