JPS6157438A - Revolvable dump truck loading bed - Google Patents

Abstract

PURPOSE:To enable unloading cargo from a dump truck at a desired position, by supporting the loading bed together with the inclining cylinder to be revolvable horizontally, and by making possible to lock its revolving at a desired place, as well as allowing dumping action in the locked position. CONSTITUTION:Related to a coupler 18 in the controlling gear section 16 where the engine 22 is mounted, the supporting frame 2 has, at its front position, a coupler 17 which is connected to be revolvable horizontally through a supporting pin 19. Nearly at the center of the supporting frame 2 is installed a hub 3 which supports the revolving shaft 5. On the revolving shaft 5, the dump bed 6 is supported inclinably around a horizontal pin 8, which enables dump action by an expanding action of a hydraulic cylinder 9 placed between the bottom of the bed 6 and the lower part of the volving shaft 5. And a receiving pulley 11, which is a part of the revolving system operated by a handle 14, is fixed on the revolving shaft 5. Furthermore, a locking device 15 to lock the revolving of the bump bed 6 isfurnished related to the driving pulley 12.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention is effectively utilized for a transport vehicle having a dump bed, and relates to a revolving dump bed.

(b) Conventional technology In the conventional transport vehicle of this type, the dump bed of the dump bed is
This lower support frame is configured with a three-point dumping system that can be tilted in three directions (left, right, sideways, and rearward) using telescoping cylinders and link mechanisms, making it convenient for dumping operations when loading and unloading cargo. I was trying to

(c) Problems to be Solved by the Invention However, the link mechanism, locking mechanism, etc. interposed between the dump bed and the support frame of this type of three-point dump truck are complicated, and their adjustment is complicated. There were drawbacks such as the need for time and effort.

Furthermore, when the dump platform configured in this manner is tilted to either the left or right side to unload a loaded object, the angle of tilt to the side increases (as it becomes larger).

-The center of gravity is thick (the tilting angle must be limited because the weight of the aircraft tends to shift and cause the aircraft to lose its balance and tip over; therefore, it is not possible to unload the loaded items by simply tilting the dump bed, and the load remains unloaded by two people) There were also drawbacks, such as the need to unload the loaded items.

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

That is, an extendable and retractable cylinder is interposed between the dump bed of the dump bed and the lower part of the rotating shaft that is vertically and rotatably supported on the support frame below the dump bed. Provided is a swiveling dump platform, characterized in that it is formed integrally with the rotation shaft in a horizontal plane above the rotation shaft so that it can be pivoted and locked, and is configured to be able to be rotated by expanding and contracting the cylinder. This is what I did.

(E) Effect This allows the dump platform to be rotated integrally with the rotation axis at any desired angle, and the cylinder can be extended and contracted at that position to tilt and dump. Compared to the case of tilting to the side using the three-point dump method, the zero center of gravity movement can be reduced and the tilting angle can be easily increased. Furthermore, since the tilting angle of the dump bed can be directly adjusted using only the cylinder, the structure can be simplified.

(F) Embodiments Hereinafter, embodiments in which the present invention is applied to the refractive type IJffi army will be described with reference to the drawings.

The first embodiment of the swiveling dump platform implemented on the rear dump platform l of the retractable transport vehicle is as shown in Fig. 1.2.
A rear wheel 4 is mounted on both left and right sides of a support frame 2 which is E-shaped in plan view and has a post 3 attached to the center thereof, and a rotation shaft 5 is attached to the post 3 in a perpendicular manner and capable of rotating once. The upper part of this rotating shaft 5 is pivoted by a horizontal pin 8 to a hanging piece 7 fixed to the approximate center of the bottom of a box-shaped dump platform 6 that can be dumped backwards, and supported so as to be tiltable. (In this case, the more rearwardly the hanging piece 7 is installed, the further backwards the support point of the horizontal bin 8 will be, and as a result, the center of gravity of the loading platform will move forward, making it possible to increase the tilting angle of the dump loading platform. Become).

A hydraulic cylinder 9 that can be expanded and contracted is interposed between the bottom surface of the dump platform 6 behind the hanging piece 7 and the lower part of the single rotation shaft 5.

Between the dump bed 6 and the support frame 2, the dump bed 6 is connected to a rotating shaft 5. Swivel device 1 that rotates together with cylinder 9 etc.
0 is included. The rotating device 10 includes a passive pulley 11 fixed to a rotating shaft 5, for example, and a connecting member 1, which will be described later.
7 An endless wire 13 is stretched for 5ft between a driving pulley 12 that is pivotally supported in the front, and a manual handle 14 is attached to this driving pulley. Things, etc. can be considered. Further, there is also a means 1 capable of locking the rotation of the dump bed 6 by the rotation device 10, such as a lock pin 15 which can be moved up and down manually from the connecting member 17 side.
Appropriate locking means 15 is provided for selectively engaging and locking the upper end with an appropriate number of engagement holes 15b formed in the drive pulley 12 at corresponding locations.

Next, as shown in FIG. 3, the second embodiment of the swiveling dump platform is similar to the first embodiment in that a pivot shaft 5 is rotatably supported on a post 3 attached to a support frame 2. After forming the rotation shaft, a horizontal rotation plate 35 is fixed to the upper part of the rotation shaft. and,
The protrusion at the rear of the upper surface of this horizontal rotating plate and the hanging piece 7 at the rear of the bottom of the dump platform 6 are pivotally connected to each other by a horizontal bin 8, and supported so as to be tiltable. Further, a cylinder 9 that can be expanded and contracted is interposed between the bottom surface of the dump bed in front of the hanging piece 7 and the lower part of the rotation shaft 5. Incidentally, in order to enable this interposition, a cylinder notch hole 35a is formed in the horizontal rotation plate 35. Therefore, the dump bed can be rotated integrally with the rotation shaft, cylinder 9, etc. on a horizontal plane above the rotation shaft 5.

Also, this second embodiment incorporates a turning device 10 that turns the dump bed 6 integrally with a rotating shaft, etc., but this turning device differs from the first embodiment. There is. Namely.

The front part of the horizontal rotating plate is extended to the extent that it protrudes from the dump platform 6, and a manual handle 14 is attached to the tip thereof. However, the structure may be similar to that of the first embodiment. Furthermore, a means 1 capable of locking the rotation of the dump bed by the rotation device 1, for example, a lock bin 15 which can be moved up and down manually from the connecting member 17 side.
Appropriate locking means 15 is provided for selectively engaging and locking the upper end portion a into an appropriate number of engagement holes 15b formed at corresponding locations on the horizontal rotating plate 35.

In addition, a balance weight 36 is installed at the front lower part of the dump platform 6.
By attaching this, it becomes possible to take a larger tilting angle of the dump platform 6, which not only has the advantage of making the dumping work of loaded objects more efficient, but also improves the effect of preventing falling during dumping work.

Next, there is a control section 16 in front of the dump bed section 1, and the connection between both 1 and 16 is made by connecting a connecting member 17 that moves forward and backward from the support frame 2 and a connecting member 18 that moves backward from a mission case 28, which will be described later. This is accomplished by fitting a U-shaped member formed at each tip and a fitting member fitted inside the U-shaped member in an overlapping manner, and inserting the connecting pin 19 vertically into this overlapping portion. Therefore, both the steering section 16 and the dump bed section 1 are rotatable in the horizontal plane around the connecting pin 19, thereby enabling steering operation.

The control section 16 includes a handle 20. It is equipped with a seat 21, an engine 22, etc., among which a steering wheel 20
A steering mechanism 24 consisting of a pitman arm 23 and the like is connected to an arm 25 installed on the side of the dump bed section 1 by a connecting rod 26. As a result, when the handle 20 is turned, one or more members are activated,
The steering section 16 and the dump bed 1 can be bent around the connecting pin 19.

The power of the engine 22 is transmitted to a mission case 28 which is freely rotatable and supported by a support shaft 27 in the longitudinal direction.
The signal is then transmitted to the axle 30 of the front wheel 29 of the steering section 16. It should be noted that a differential device is installed in the center of this axle 30 and housed in a differential gear case 31 (hereinafter referred to as differential case 31).

Steering is performed using this method.

In addition to these, on the control unit 16 side, there is a telescopic operation lever 32 for extending and retracting the cylinder 9. A gear shift lever 33 for performing gear shifting operations inside the transmission case 28, a clutch, and brake pedals 34 are provided.

In the figure, 37 is a differential case, and 38.39 is a bending joint (31.39) on the slightly outer side of each differential case 31.37 because the steering section 16 and dump bed section 1 bend once around the connecting pin 19. universal joint) 40
．． In addition to being bendable through 41, the central end of the drive shaft is fitted inside and out by spline fitting etc. to make it extendable and retractable; 42 is a horizontal stopper for the dump platform 6; 43 is a horizontal rotating plate 35; When used as a guide fixed in place on the support frame 2 side to ensure rotation in a horizontal plane, the IM should be placed in a normal horizontal position (see solid lines in Figures 1 to 3) in a position where it can be dumped behind the vehicle. After loading cargo such as gravel and lumber onto the dump bed 6 and transporting it to the destination, move the dump bed 6 in the normal position mentioned above to the telescopic operation lever 32FX! The cylinder 9 is expanded and contracted by the action (in the first embodiment, it is retracted, and in the second embodiment, the cylinder 9 is retracted).
In the example, it is extended), rearward, and M! I'll take down the gift, but...

After appropriately releasing the locking means 15, the manual handle 14
, move the dump bed 6 to the desired left or right direction (
From the normal position, turn the platform to the left (approximately 90 degrees and right) (possible within approximately 90 degrees) and lock again, then extend and retract the cylinder 9 in the same locked position, and the dump platform 6 will tilt around the horizontal pin 8. The cargo can then be unloaded at that location. and.

After extending and contracting the cylinder 9 and returning the dump platform 6 to a horizontal position, the dump platform 6 is returned to its normal position in the same manner as the above-mentioned swing lock operation and the next stage of loading and unloading operations begins.

The cylinder 9 and the dump bed 6 are designed so that they do not interfere with the support frame 2 when the dump bed 6 is tilted, and since the dump bed 6 is always tilted in one direction, a corrugated plate is used as the floor plate. May be used.

(G) Effects of the Invention The present invention, which has a configuration more than the above, rotates the dump bed 6 and the cylinder 9 simultaneously with the rotation of the rotation shaft 5, locks the dump bed at a desired position, and locks the dump bed at the desired position. Since the cylinder can be expanded and contracted in the locked position, the dump bed can be tilted, and the loaded object can be unloaded, there is no need for complicated link mechanisms and locking mechanisms, which are required with conventional three-point dump systems, and there is no need to adjust them. In addition to significantly simplifying the structure, the center of gravity shifts twice compared to the conventional three-point dumping system where the dump bed is tilted to the side.

Because it is smaller, the tilting angle of the dump bed can be increased.1
Since M'S items can be unloaded without the need for manpower, work efficiency can also be improved.

In addition, since the dump bed can be rotated to any desired position, compared to the conventional three-point dump system, it is easier to load and unload cargo at the desired position without moving the transport vehicle. The scope of work can also be expanded.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a refraction type transport vehicle in which the present invention is implemented, Fig. 2 is an open plan view, and Fig. 3 is a side view of essential parts showing a refraction type transport vehicle in which the second embodiment of the invention is implemented. , FIG. 4 is a partial sectional view showing the area around the traveling work axis. (Symbol) 1... Dump loading platform 2... Support frame 6... Dump loading platform 9... Cylinder 15... Rotating shaft 16... Operating slave part

Claims (1)

[Claims] A cylinder that can be expanded and contracted between the dump platform (6) of the dump platform section (1) and the lower part of a rotating shaft (5) vertically and rotatably supported on the support frame (2) below. (9
), the dump bed (6) is integrally formed with the rotation shaft (5) in a horizontal plane above the rotation shaft (5) so that it can be pivoted and locked, and the cylinder (9
) A swiveling dump platform that can be tilted by expanding and contracting the platform.