JPH032472Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a structure of a bumper weight attachment part in a tractor having a front loader attachment device.

A front loader is used by being attached to a tractor when loading and unloading soil, fertilizer, etc., and is removed when the work is completed. Because it is relatively lightweight, when a work machine is attached to the rear, a bumper weight is often attached to the front of the front axle bracket to prevent the front wheel from floating.

A known front loader mounting device is one in which the front loader is mounted using a guide pin protruding from the front side of the tractor body as a guide. In order to avoid getting in the way of the guide pin, the member for attaching the guide pin had a complicated structure, which caused problems in terms of strength and economy.

The present invention was devised in view of the above circumstances, and aims to provide a bumper weight mounting portion structure that allows easy attachment of a front loader and bumper weight and has excellent strength.

That is, the structure of the bumper weight attachment part according to the present invention includes a front plate having a function of locking the bumper weight, a pair of left and right side plates extending rearward from the left and right ends of the front plate, and a side plate located rearward of the front plate. A box-shaped steel frame made of a middle plate that connects a pair of left and right side plates and a plurality of ribs that connect the middle plate and a front plate projects forward from the front axle bracket of the tractor, The frame is characterized in that a side plate is provided with a front loader mounting guide pin that projects laterally outward at an intermediate position between the front plate and the middle plate. The embodiments shown in the drawings will be described below.

Figures 1, 2, and 3 are side views showing an example of a tractor to which the present invention is applied, and Figures 4a,
b is a plan view and a side view of the main part. This tractor 1 is provided with a mounting frame 5 for attaching bumper weights so as to surround both front ends from the front surface of a front axle bracket 3, and intermediate brackets 6 on both sides of the middle part of the front axle bracket. Rear brackets 7, 7 are provided on both sides, respectively. These intermediate brackets 6, 6, rear brackets 7, 7, and a portion of the mounting frame 5 allow the front loader 9 to be detachably mounted. Further, a working machine such as a tiller is used by being connected to a traction device (not shown) provided at the rear of the machine body.

The mounting frame 5 includes side plates 11, 11, a front plate 12 fixed to the front ends of these side plates, and a middle plate that extends parallel to the front plate 12 between both side plates and abuts the front end surface of the front axle bracket 3. 13, and a reinforcing rib 1 connecting the front plate 12 and the middle plate 13
4, 14, . . . , and front guide pins 16, 16 are attached to portions of the side plates 11, 11 that protrude further forward than the front axle bracket 3, respectively. These guide pins 16, 16 are
Boss 16a with a screw hole provided at its base
It is fixed to the side plate 11 by a bolt 16b screwed into the side plate 11, and can be attached or detached as necessary, but it may be provided integrally with the side plate 11.

The front plate 12 of the mounting frame 5 is formed to have a thickness that just fits into the locking recess 15a of the bumper weight 15, and by engaging the locking recess 15a with the front plate 12, Thus, a required number of bumper weights 15 can be attached to the mounting frame 5. The mounting frame 5 is fixed to the front axle bracket 3 of the tractor by bolts 17, 17, . . . .
At the upper end of the intermediate bracket 6 projecting upward from the front axle bracket 3, there is a horizontal intermediate guide pin 18 provided with a pin hole 18a.
is fixed. Further, the rear bracket 7 is a plate material having a recess 20 in its upper part, the front part of the recess 20 serves as a guide part 20a, and the rear part serves as an engagement recess 20b extending rearward.

On the other hand, the front loader 9 includes an L-shaped frame 22 for attaching and detaching, and the base of a lift arm 23 is pivotally supported at the upper end of the vertical member 22a.
By expanding and contracting a piston rod 25 of a hydraulic cylinder 24 that connects the base of the frame 22 and the intermediate portion of the lift arm 23, the lift arm 23 can be rotated up and down. On the lower side of the horizontal member 22b of the frame 22, mounting legs 2 are provided as attachment means to the tractor 1.
7, an intermediate support member 34, a protrusion 35, a seat plate 37, etc. are provided. The mounting leg 27, which is provided diagonally downward from the front end of the horizontal member 22b, has a pair of rails 28, 28' attached to its inner surface.
A connecting leg 29 can be connected and fixed to the tip portion with a pin 29a. At the intermediate portion of the horizontal member 22b, a pair of left and right intermediate support members 34, 34 each having a hook-shaped guide rail 33 in side view attached to the inner surface, and a guide protrusion 35 projecting downward in a chevron shape at a position immediately after the intermediate support member 34 are provided. are fixedly provided. Further, a pair of left and right seat plates 37, 37 are protruded from the rear end portion of the horizontal member 22b, and a horizontal locking pin 38 is provided on the seat plates 37, 37 on both sides.

A bucket belt 39 is pivotally attached to the front end of the lift arm 23 so as to be able to rotate up and down, and is connected to a rotating member 40 which is similarly pivotally attached to the lift arm 23 by a connecting rod 41. A piston rod 42a of a dump cylinder 42 is connected to the rotating member 40, and the bucket cart 39 can be rotated up and down as the dump cylinder 42 expands and contracts.

To attach the front loader 9 to the tractor 1, the front loader 9 with the lift arm 23 in a laid down state is attached to a bucket 39 provided at the tip of the lift arm 23 and a connecting leg 29 connected to the mounting legs 27, 27. The tractor 1 is supported at three points 29 and placed upside down on the ground, and the tractor 1 is advanced from behind the front loader 9 to a predetermined position so that the engine room 2 fits into the space between the frames 22 and 22. This is done by retracting the piston rod 25 of the hydraulic cylinder 24 connected to the provided hydraulic system into the cylinder. Then, the front loader 9 rotates clockwise in FIG.
8 and 28', the intermediate guide pin 18 of the intermediate bracket 6 is guided by the guide protrusion 35 and fitted into the guide rail 33, and the seat plate 37,
The locking pin 38 is attached to the guide portion 20 of the rear bracket 7.
a and engages with the engaging portion 20b. Then, insert the pin into the pin hole 18a of the intermediate guide pin 18 and the pin hole 34a of the intermediate support member 34,
Mounting is completed by fixing the front loader 9.

Furthermore, in order to remove the front loader 9 mounted on the tractor, the procedure for mounting the front loader 9 described above may be roughly reversed. When the front loader 9 is not in use, the whole frame 22 can be removed from the tractor, so the field of view near the front wheels 50 from the seat is widened and work efficiency is improved.

The mounting frame 5 is used not only for mounting the front loader 9 but also for mounting the bumper weight 1 as described above.
5. Can be used as a mounting member. When installing this bumper weight, it is convenient because there is no need to remove or replace the member for installing the guide pin 16.

Moreover, this mounting frame 5 is formed into a framework shape and has a simple and strong structure, so it is economical, and the guide pins 16 firmly support the bumper weight 15, and the front surface of the front axle bracket 3 is fixed. It can also be expected to be effective as a protective member for the parts.

As is clear from the above explanation, the structure of the bumper weight attachment part of the tractor according to the present invention is structurally simple, has excellent strength, and is highly practical as it allows easy attachment and detachment of the front loader and bumper weight. Summer.

[Brief explanation of the drawing]

Figures 1, 2, and 3 are side views showing one example of a tractor to which the present invention has been applied. Figure 3 shows the front loader removed and the bumper weight installed. Figures 4a and b are a plan view and a side view of the main parts, Figure 5 is a parts diagram, Figure 6 is a plan view of the tractor equipped with a bumper weight, and Figure 7 is a side view of the bumper weight. be. DESCRIPTION OF SYMBOLS 1... Tractor, 3... Front axle bracket, 5... Mounting frame, 6... Intermediate bracket, 7... Rear bracket, 9... Front loader, 11... Side plate, 12... Front plate, 15... Bumper weight, 26... Guide pin, 22...
flame.

Claims (1)

[Scope of utility model registration request] A front plate having a bumper weight locking function, a pair of left and right side plates extending rearward from the left and right ends of the front plate, a middle plate connecting the pair of left and right side plates at a position rearward from the front plate; A box-shaped steel plate frame formed by a plurality of ribs connecting the middle plate and the front plate is provided protruding forward from the front axle bracket of the tractor, and the side plate of the frame has a frame formed by a plurality of ribs connecting the middle plate and the front plate. The structure of a bumper weight attachment part is characterized by having a front loader attachment guide pin that protrudes laterally and outward at the same position.