JPS6127774A - Connecting pin setup structure in bending type farm working car - Google Patents

Abstract

PURPOSE:To increase a working range in a rear body, by installing working power in the rear body. CONSTITUTION:A connecting member 29 is extended rearward from a transmission case of a front body, while another connecting member 31 is extendedly installed from a frame of a rear body, then U-shaped connecting parts 32 and 33 being superposed on each other are formed in the tip of each of these connecting members 29 and 31 in advance, and both are pivoted together with a connecting pin 3. Working pivotal shafts 34 and 35 are housed in these connecting members 29 and 31, and both these shafts are coupled together at the same center position as the connecting pin 3 with a universal joint 36. And, the connecting pin 3 is set up in position midway between both axles of the front body and the rear body.

Description

[Detailed description of the invention] (a) Industrial application field This invention connects the front car body and the rear car body by means of a connecting pin so that they can rotate in a horizontal plane, and thereby enables steering operation. The present invention relates to the arrangement structure of the connecting pins in the folding type work vehicle.

(b) Conventional technology Work vehicles like this have existed for a long time.

For example, Utility Model Application No. 58-157732, Utility Model Application No. 58-1
As seen in 78068, there is an engine in the front body.

The transmission, steering wheel, and other power-generating control parts were permanently installed, and the rear body of the vehicle could be used for various types of work vehicles, and these could be replaced in various ways to accommodate the diversification of work.

However, if the vehicle requires a power source other than running drive power on the rear vehicle side (for example, rotational drive power to drive the rotary drive shaft, etc.), it is quite difficult to construct a structure to introduce that power. For some reason, it was not possible to use any type of work vehicle; at best, it was just a replacement of a transport vehicle of a different length.

(c) Problems to be solved by the invention By the way, when rear car bodies of different lengths are replaced (regardless of whether they are of the same type or different types), the connecting points between the front and rear car bodies are As a result, when steering the vehicle, the turning radius will be different for the front and rear bodies, requiring a wider road, or in some cases causing the wheels to run off the road. or

However, since these bendable work vehicles are often used for agriculture, forestry, etc., wide roads can be expected in the areas where they work, which has been a problem.

(d) Means for solving the problems Accordingly, the present invention solves the above-mentioned problems by taking the following measures.

That is, the front and rear bodies are connected by a bendable and telescoping drive shaft, and connecting members extending from the front and rear bodies toward the other are vertically overlapped near the middle. By inserting a connecting pin vertically into the overlapping part.

In the bending type work vehicle, which is configured such that the front vehicle body and the rear vehicle body can rotate in a horizontal plane around the connecting pin, a work drive shaft can be accommodated in each of the connecting members, and in such a case, both the work drive shafts can be accommodated. The basic configuration is that the drive shaft is connected to the connecting pin in a vertically concentric position by a bending joint, and the positions of the connecting pin and the bending joint are set in the middle of both the axles of the front vehicle body and the rear vehicle body, and ,
An additional feature is that one of the connecting members is constructed with an adjustable structure that allows the length to be adjusted.

(E) Function This allows a drive source other than the travel drive source to be introduced to the rear vehicle body, and can be used to perform various tasks. And especially this drive source (work drive shaft)
If it is housed in each connecting member for connecting the front and rear car bodies, it is safe, saves space, and makes the joint of the working drive shaft of one car concentric with the connecting pin that connects the connecting members. By doing so, it will not cause any obstruction even when the vehicle bends.

Furthermore, no matter what type of work vehicle is connected to the rear vehicle body, the above-mentioned joint (bending point) is always located midway between the axles of the front and rear vehicles.

The turning radius of the front and rear car bodies when turning is the same.

(F) Examples Examples of the present invention will be described below with reference to the drawings.
Figure 1 is a side view of the folding type work vehicle when the rear body is used as a dump platform, Figure 2 is a plan view, Figure 3 is a side view when the rear body is used as a rotary work machine, and Figure 4 FIG. 2 is a cross-sectional side view showing a connecting pin of a connecting member and a bending joint portion of a working drive shaft.

FIG. 5 is a partial sectional view showing the area around the traveling working axis, and FIG. 6 is a plan view of the main parts showing another embodiment of the refraction type work vehicle.

The bending type work vehicle consists of a front vehicle body 1 and a rear vehicle body 2, both of which are connected by a connecting pin 3 located in the middle. Therefore, the front body 1 and the rear body 2
Both are rotatable within the horizontal plane around this connecting pin 3.

This allows steering and steering.

In the front part of the vehicle body 1, there is a handle 4. It is equipped with 5 seats and 6 engines, among which.

The steering wheel 4 is connected from a steering mechanism 8 comprising a pitman arm 7 and the like to an arm 9 installed on the rear vehicle 2 side by a connecting rod 10. As a result, when the handle 4 is turned, two or more members are activated, and the front body 1 and the rear body 2 can be bent around the connecting pin 3.

The engine 6 generates power from the support shaft 1 in the longitudinal direction.
The signal is transmitted to the transmission case 12 which is freely rotatably supported around the transmission case 1 by the transmission case 1, and is further transmitted to the axle shaft 14 of the front wheel 13 of the front vehicle body 1. Incidentally, since a differential device is housed and installed in the center of this axle 14 in a differential gear case 15 (hereinafter referred to as differential case 15), steering is performed by this method.

In addition to these, on the front vehicle body 1 side, there is a gear shift lever 16 that performs gear shifting operations inside the transmission case 12, a clutch,
It is equipped with 17 brake pedals.

Next is the 5 rear body 2 side, which differs slightly depending on the type, but the rear wheels 18, differential case 19, axle 20, etc. are tightly installed, and there are 3 other parts, such as those for transport work vehicles. If there is one (see Figures 1 and 2), the loading platform 21 is connected to the support pin 22.
In addition, a hydraulic cylinder 23 for raising and lowering the loading platform 21 is also provided, and if it is a low-rise work vehicle specification (see Fig. 3), another transmission that also serves as the differential case 19 described above is provided. The case 24 is equipped with a pitch mechanism 25. Lift mechanism 26. P
A TO mechanism 27° rotary mechanism 28 and the like are also provided.

By the way, the present invention is a folding type working vehicle having a structure as described above, in which the above-mentioned connecting pin 3 is arranged in the following structure.

That is, first, regarding the connection structure between the front vehicle body 1 and the rear vehicle body 2, the connection member 29 is extended rearward from the transmission case 12 of the front vehicle body 1, and the frame 30 of the rear vehicle body 2 is
A U-shaped connecting portion 3 that similarly extends forward from the connecting member 31 and overlaps with the tip of each connecting member 29 and 31.
2.33, and these both 32.33 are pivotally connected by the above-mentioned connecting pin 3. Further, in the present invention, the connecting member 29.31 is made hollow, and the working drive shaft 34.35 is accommodated therein, so that both the connecting members 29.31 and 34.31 are hollow.
35 is connected to the connecting pin 3 at a concentric position by a bending joint (universal joint) 36. Therefore, since the 1-work drive shaft 34, 35 passes through the connecting pin 3, it is necessary to make it into two pins that are interrupted in the middle, and these two pins 3, 3 and the bending joint 36 The center of this line lies on the same vertical line (see Figure 4). Furthermore, since the load is applied in the vertical direction as well, it must also rotate in the vertical direction at this point.
It is preferable that the holes of the U-shaped connecting portions 32 and 33 through which the connecting pins 3 are inserted have a slightly elongated hole shape in the front-rear direction.

Further, the travel drive shaft 37. Since the front body 1 and the rear body 2 bend and move twice around the connecting pin 3, s8 can be bent freely through a bending joint 39,40 on the slightly outer side of each differential case 15,19. In addition, the central end is fitted inside and out using spline fitting, etc., to make it expandable and retractable (see Figure 5).

On the other hand, after doing so, the position of the connecting pin 3 is placed between the axle 14 of the front vehicle body 1 and the axle 2o of the rear vehicle body 2.

This arrangement may be such that the length of each connecting member 29, 31 is set according to the type of the rear vehicle body 2, or one or both of the connecting members 29, 31
9.31 may be adjusted by an adjustment structure 41 with a plurality of holes and pins (the length of the iron 10 must be adjusted accordingly) (see FIG. 6).

(g) Effects of the Invention First, since working power can be introduced to the rear vehicle body 2 in addition to running power, the working range of the rear vehicle body 2 is thereby increased. Therefore, the work vehicle can be made more versatile.

In this case, the two-work drive shafts 34, 35 can be accommodated in the respective connecting members 29, 31, so that they are not exposed, which is not only safe, but also saves space.

Furthermore, since the connecting pin 3 is always located between the axle 14 of the front vehicle body 1 and the axle shaft 15 of the rear vehicle body 2, the turning radius of the front vehicle body 1 and the rear vehicle body 2 during one turn is the same, that is, 1
This is because the respective rotation radii Ll and L2 from the rotation center 0 are equal (see FIG. 2).

Both the front and rear wheels follow the same trajectory, allowing the vehicle to navigate even narrow roads without disturbing unexplored terrain.

Furthermore, if the arrangement of the connecting pins 3 is based on the adjustment structure 41 described above, each connecting member? 9.31 may be the same, or when stored, it can be stored at its shortest length,
It also has the advantage of not taking up much space.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of a retractable work vehicle when the rear vehicle body is used as a dump loading platform, Fig. 2 is a plan view of the same, and Fig. 3 is a view of the rear vehicle body. FIG. 4 is a cross-sectional side view showing the connecting pin of the connecting member and the bending joint of the work drive shaft, and FIG. 5 is a partial cross-sectional view showing the area around the traveling work shaft. , 6th
The figure is a plan view of the main parts of another embodiment of the refracting work vehicle. (Symbol) 1...Front car 2...Rear car 3...Connecting pin 14...Front wheel axle 20...Rear wheel axle 29...Connection member 31... 〃 34...Work Drive shaft 35...Work Drive shaft 36...Bending joint 37...Travel drive shaft 38... 41...Adjustment structure

Claims (2)

[Claims] (1), the front vehicle body (1) and the rear vehicle body (2) are connected by bendable and telescoping drive shafts (37) and (38), while the front vehicle body (1) and the rear vehicle body (2) The connecting members (29) and (31) each extending toward the other are overlapped vertically near the middle, and a connecting pin (3) is attached to this overlapping part.
In the retractable work vehicle, the front vehicle body (1) and the rear vehicle body (2) can be rotated in a horizontal plane about the connecting pin (3) by vertically inserting the connecting member ( Work drive shafts (34) are located in (29) and (31), respectively.
), (35), and in such a case, both the work drive shafts (34), (35) can be connected to the bending joint (3
6), the connecting pin (3) and the bending joint (36)
A connecting pin arrangement structure in a refraction type work vehicle, characterized in that the position of is set between the axles (14) and (20) of the front vehicle body (1) and the rear vehicle body (2). (2), one of the connecting members (29) and (31) is an adjustable structure (41) consisting of a plurality of holes and pins and whose length can be adjusted;
) A structure for arranging connecting pins in a bending type working vehicle according to claim (1).