JPS6021303Y2 - Dump shaft core switching structure for three-way dump bed - Google Patents

Description

[Detailed description of the invention] This invention has a loading platform as a vehicle body, a first axis facing in the left-right direction of the vehicle at one end of the front and back of the vehicle, and second and third axles facing in the front-rear direction of the vehicle at both left and right ends of the vehicle. The present invention relates to a dump shaft center switching structure for a three-way dump platform, in which the dump truck is swingable around either of the two sides, and is provided with an operating mechanism for selecting the dumping direction of the platform.

Conventionally, in order to switch the dump shaft core, each of the first to third shaft cores is constructed from a pair of pivot parts, and a pin is attached to each of the pivot parts so as to be freely inserted and removed, and all six pins are attached to each of the pivot parts. are interlocked and connected to one operating lever with a cam mechanism, etc. interposed, and when operated, the two
One pin is inserted and two pins are removed from the other pair of pivots, and all six pins must be accurately interlocked with each other in relation to the operating lever. As a result, assembly was time-consuming.

In view of the above points, the present invention has been developed to reduce the number of interlocking parts when changing the shaft center, to facilitate assembly, and to enable safe dumping with the loading platform connected and fixed to the pivot. The purpose is to

Next, embodiments of the present invention will be described in detail based on the drawings.

A control unit 2 is installed at the rear of the vehicle body equipped with a crawler type traveling device 1.
In addition, a loading platform 3 is provided in front of the loading platform 3 so as to be swingable for driving a dump truck via a hydraulic cylinder 4, so that a dump truck can be used.

To provide the loading platform 3, a loading platform support member 6 is provided on the front end side of the vehicle body frame 5 so as to be swingable around a first axis P1 facing in the left-right direction of the vehicle body.
A cargo platform pivot 7 and a second cargo platform pivot 8 are provided on the right side of the vehicle body, and a third cargo platform pivot 9 is provided on the left side of the vehicle body, and a fourth cargo platform pivot portion 8 is provided on the right side of the vehicle body, on the side near the control section 2. 10 respectively, and the selection operation mechanism 11 connects the loading platform 3 to the first and second loading platform pivots 7 and 8 to swing the dump truck around the first axis P1, and the first and third loading platform
A state in which the dump truck is swung around a second axis P□ facing the longitudinal direction on the left side of the vehicle body by being connected to the loading platform pivot portions 7 and 9, and a state in which the dump truck is connected to the second and fourth loading platform pivot portions 8.10. The dump truck is switched to a state in which the dump truck is swung around a third axis P3 facing in the front-rear direction on the right side of the vehicle body, so that the dump truck can be swung toward either the front of the vehicle body or the left or right side of the vehicle body. .

Said first to fourth loading platform pivots? , 8.9. 10 is a recessed support part 12 formed in the support member 6 and the vehicle body frame 5, each of which is configured to be able to fit and support a support shaft 13 connected to the loading platform 3 side, and a recessed support part 12 formed in the support member 6 and the vehicle body frame 5. First to fourth hooks 14, 15, which are swingable so as to be able to change between a disconnected state that allows the support shaft 13 to detach from the recessed support portion 12 and a connected state that prevents detachment. 16.
17, and the first and second hooks 14 and 15 provided on the support member 6 are urged by a spring 18 to swing toward the connection side, while the third and second hooks provided on the vehicle body frame 5 are 4 hooks 16.17 to spring 19
It is biased so that it swings toward the disconnection side.

A first operation rotation shaft 20 is rotatably mounted on the vehicle body frame 5, offset from the left and right center thereof, and a second operation rotation shaft 21 is fitted onto the first operation rotation shaft 20 so as to be relatively rotatable, The first operation rotation shaft 2° has a 17th hook 14 on its front end side, a 47th hook 17 on its rear end side, and the second operation rotation shaft 21 has a 27th hook 15 on its front end side. The third hooks 16 are linked to each other via links 22 on the rear end side.

As shown in FIG. 5, the third and fourth hooks 16.
The first and second brackets 23 and 24 are provided in a protruding manner so as to connect to the 17, and the 18
The third and fourth brackets 25 are 0 degrees out of phase.
．． 26 protrudingly provided, and the first and second operating rotation shafts 20
．． A concave-shaped bracket 27 is provided surrounding the bracket 21 and swingable around the axis 0 perpendicular to the direction of the rotation axis, and a rod 28 is provided across both free ends of the bracket 27.
A shifter 30 interlocked with an operation lever 29 provided on the control section 2 so as to be freely swingable in a cross direction is engaged with the rod 28 in a state where it can be slidably displaced in the axial direction of the rod 28, and the shifter 30 is Pins 31 and 31 are provided protrudingly on both the front and rear sides, and on the other hand,
A notch 32.32 is formed in each of the first and second brackets 23.24 to engage the pin 31.31, and when the lever 29 is swung along the guide groove 33, the intermediate The shifter 30 is selectively engaged with the first or second operating rotation shaft 20.21 by operating on the longitudinal path R1, and the shifter 30 is operated on the vehicle body sideward path R2, which is sudden on both ends.
The first and second operation rotation shafts 20.21 are operated by R3.
It is designed to be operated selectively.

The first part of the shifter 30 is attached to the concave bracket 27.
and in a disengaged state with respect to the second bracket 23,24,
The third and fourth brackets 25, 26 are engaged with both cutouts 34, 34 formed in each of the brackets 25, 26, and
When the bracket is engaged with the first bracket 23, it engages only the fourth bracket 26, and when it is engaged with the second bracket 24, it engages only the third bracket 25, respectively.
First and second operating rotation shafts 20.2 having first and second brackets 23 and/or 24 with a protruding locking member 35 and with which the shifter 30 is not engaged.
1 or one of them, that is, the first and second operating rotation shafts 20, 21 that are not engaged with the operating lever 19.
Alternatively, the rotation of either one of them is mechanically prevented by the locking member 35, so that the first and second loading platform pivot parts 7 and 8, or either one of them, is reliably connected and fixed.

With the above configuration, as the operating lever 29 switches between the engagement states with the first and second operating rotation shafts 20.21,
The loading platform 3 is connected and fixed by the first and second loading platform pivot parts 7 and 8 in a state of disengagement with the first and second operating rotation shafts 20 and 21, and is dumped toward the front of the vehicle body around the first axis. Then, the loading platform 3 is connected and fixed by the first and third loading platform pivot parts 7 and 9 in a state in which it is engaged with the second operation rotating shaft 21 and rotated, and the vehicle body is rotated around the second axis P2. The loading platform 3 is connected and fixed by the second and fourth loading platform pivot parts 8 and 10 so as to be dumped to the left side, and in a state where it is engaged with the first operation rotating shaft 20 and rotated. Then, as appropriate, so that the vehicle is dumped to the right side of the vehicle body around the third axis P3,
It can be switched to the dump direction.

In order to link the first and second hooks 14.15 with the first and second operation rotation shafts 20.21, the brackets 36.36 protruding from both shafts 20.21 are fixed by locking members 35. A pin 38 attached to the tip of the link 22 is engaged with the notch 37 facing in the vertical direction, so that the pin 38 attached to the tip of the link 22 can be moved around the first axis P1 without separating the bottle 3B from the notch 37. It is designed to allow the dump truck to swing.

Although not shown, the front and left and right side plates of the loading platform 3 are configured by tilt plates, and as the dump shaft center is switched, the lock mechanism for the tilt is automatically switched between an operative state and a non-operative state. It is structured like this.

In summary, the present invention provides a dump shaft center switching structure for a three-way dump bed as officially registered, in which the first shaft center P is attached to the vehicle body.
A loading platform support member 6 is provided to be swingable around the loading platform supporting member 6, and a first loading platform pivoting portion 7 is provided on the left side of the loading platform supporting member 6, and a second loading platform pivoting portion 8 is provided on the right side of the loading platform supporting member 6. In addition, a third loading platform pivot support 9 is provided on the left side of the vehicle body.
and a fourth loading platform pivot 10 is provided on the right side in a state in which the loading platform 3 is connected to the first and third loading platform pivots 7 and 9, respectively, so that the loading platform 3 is connected to the first and third loading platform pivots 7 and 9. Second
around the axis P2, and the second and fourth loading platform pivot parts 8
, 10, the loading platform 3 is connected to the third axis P3.
The first and fourth loading platform pivots 7 are configured to swing the dump truck around each other, and constitute the selection operation mechanism 11.
, 10, and a second operating rotation shaft 2 linked to the second and third loading platform pivots 8, 9.
1 is provided in a double shaft shape, and a single operating lever 29 that can freely swing in a cross direction is selected by swinging in one direction with respect to the first and second operating rotation shafts 20.21. A first or second operating rotating shaft 20.21 is provided so as to be freely engageable and to be selectively engaged as it swings in the other direction, and the first and second operating rotating shafts 20. A locking member 35 for the operation lever 21 is provided in a state in which the lock member 35 is interlocked with the operation lever 29 and acts on the one of the first and second operation rotation shafts 20.21 that is not engaged with the operation lever 29. The operating lever 29 to the same operating rotation shaft 20.21
The state of dumping around the first axis P1 in the disengaged state is the state in which the second operating rotation shaft 2 is moved by the operating lever 29.
1 is operated, the dumping is performed around the second axis P2, and the operation lever 29 is activated to dump the first
It is characterized in that it is configured so that a state of dumping around the third axis can be obtained while the operation rotation shaft 20 is operated.

In other words, 1. By interposing the support member 6 between the loading platform 3 and the vehicle body, the number of loading platform pivots 7 can be reduced to four, and the first and second loading platform pivots 7 and 8 of the support member are connected. side, the third and fourth loading platform pivots 9 and 10 of the vehicle body are biased toward the connection release side, respectively, and the first and fourth loading platform pivots 7,
10 in conjunction with each other, a first operating rotation shaft 20, a second and a third
Since the dump shaft center is switched by selectively operating the second operation rotation shaft 21 that is linked to the loading platform pivot 8°9, the first and fourth loading platform pivots 7, 10 and the second It is only necessary that the three parts in each of the third cargo platform pivot parts 8 and 9 are appropriately interlocked with each other, and the number of interlocking members can be minimized when changing the axis, and relative positions can be easily adjusted and assembly is easy. It became easy to do.

Furthermore, since the non-operating side of the first and second operation rotation shafts 20.21 is fixed by the locking member 35, it is possible to reliably avoid the loading platform 3 from coming off the pivot portion.
It has now become possible to safely perform dumps.

[Brief explanation of the drawing]

The drawings show an embodiment of the dump shaft center switching structure for a three-way dump truck according to the present invention. FIG. 1 is an overall side view of the dump truck, FIG. 2 is a plan view of the main parts, and FIG. FIG. 4 is a sectional view taken along the line IV--IV in FIG. 2, and FIG. 5 is a perspective view of the main parts. 3... Loading platform, 6... Loading platform support member, 7
...First loading platform pivot branch, 8...Second loading platform pivot branch, 9...Third loading platform pivot branch, 10...
...4th loading platform pivot, 11...selection operation mechanism,
20...First operation rotation axis, 21...Second operation rotation axis, 29...Operation lever, 35...
... Tatsuku member, Pl... First axis, P2.
...Second axis, P3...Third axis.

Claims (1)

[Scope of utility model registration request] With the loading platform 3 as the vehicle body, a first axis P1 facing the left-right direction of the vehicle body at one end of the front and back of the vehicle body, and second and third axes P2 facing the front-rear direction of the vehicle body at both left and right ends of the vehicle body. A dump shaft center switching structure for a three-way dump bed is provided with an operation mechanism 11 for freely swinging the dump shaft around either of P3 and selecting a dumping direction of the bed 3, wherein the first shaft center P1 is attached to the vehicle body. A loading platform support member 6 is provided to be swingable around the loading platform support member 6, and a first loading platform pivot portion 7 is provided on the left side of the loading platform support member 6, and a second loading platform pivot portion 8 is attached to the right side of the loading platform support member 6, and each of the loading platform support members 6 can be freely uncoupled and biased toward the connection side. In addition, a third cargo platform pivot portion 9 is provided on the left side of the vehicle body, and a fourth cargo platform pivot portion 10 is provided on the right side of the vehicle body so that the first and third Loading platform branch 7,
9, the loading platform 3 is moved around the second axis P2, and when connected to the second and fourth loading platform pivot parts 8, 10, the loading platform 3 is moved around the third axis P3. The selection operation mechanism 11 includes a first operation rotation shaft 20 linked to the first and fourth loading platform pivot parts 7 and 10, and a second and third A second operation rotation shaft 21 linked to the cargo platform pivot parts 8 and 9 is provided in a double shaft shape, and the first and second operation rotation shafts 20.2
1, a single cross-swingable operation lever 29,
A first or second operation rotating shaft 20.21 is provided so as to be freely rotatable and selectively engaged as it swings in one direction, and selectively engaged as it swings in the other direction. , the locking member 35 for the first and second operation rotation shafts 20.21 is interlocked with the operation lever 29, so that the lock member 35 for the first and second operation rotation shafts 20.21 is in a disengaged state with the operation lever 29 of the first and second operation rotation shafts 20.21. The state in which the operating lever 29 is dumped around the first axis P1 when the operating lever 29 is not engaged with the both operating rotation shafts 20.21 is the state in which the operating lever 29 When the second operating rotation shaft 21 is operated and the dumping is performed around the second axis y)2, and the operating lever 29 is operated, the first operating rotation shaft 2
1. A dump shaft center switching structure for a three-way dump platform, characterized in that the dump shaft center switching structure of a three-way dump platform is configured such that a state in which dumping is performed around the third shaft center is obtained in a state in which the third shaft center is operated.