JPH0739726Y2 - 4 crawler type traveling vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a four-crawler type traveling vehicle which can be steerably traveled by four front, rear, left and right crawlers.

[Prior Art] A conventional crawler-type traveling vehicle has a structure in which the vehicle is driven by both left and right crawlers, and at the time of turning, a brake is applied to a crawler inside the turning direction to turn.

[Problems to be solved by the invention] Therefore, when turning, the crawler on the inside of the turn is turned while being braked, so that the turning horsepower is increased and moreover, the ground and the grass on the ground are damaged.
Further, there is a problem that the aircraft is only capable of going straight and turning, and that it is not possible to travel so as to move diagonally forward while keeping the aircraft facing forward and backward.

[Means for Solving the Problem] The present invention solves such a problem and enables the vehicle to make a small turn or run well in front of the slope without roughening the ground, and therefore, the front part of the mission case. The left and right drive shafts are connected to the rear drive wheels of the front crawlers, and the rear left and right drive shafts of the transmission case are connected to the front drive wheels of the rear crawlers via universal joints. A side clutch and a brake are respectively installed in the transmission paths of the drive shafts, and the tip end side of a piston rod extending left and right from both lateral return type hydraulic cylinders installed in front of and behind the mission case. Is interlockingly connected to both front crawlers and rear crawlers.

[Operation] Therefore, when both the front and rear hydraulic cylinders are operated, the front and rear crawlers can be laterally rotated in parallel postures. When the front and rear crawlers are steered in opposite directions. , It is possible to make a small turn without ruining the ground, and if the vehicle is steered in the same direction, the aircraft can run diagonally forward while facing in the front-rear direction.

Example Next, an example shown in the drawings will be described.

FIG. 3 shows a side view of a traveling vehicle capable of controlling a radio control,
The engine (9) is connected to the rear of the mission case (1) fixed to the lower part of the cargo bed (8), and the front and rear left and right sides of the mission case (1) are transmitted by sprocket chains (10a) and (10b), respectively. The connected drive shafts (2a) (2c) and (2b) (2d) are respectively provided in a protruding manner, and the rear drive shafts (2c) (2d) have side clutches that can be engaged and disengaged with the central gear (11). The body (12a) (12b) and the brake body (13a) (13b) are respectively installed, and the hydraulic pump (1
4) The input shaft (15) capable of driving 4) and the engine (9) are transmission-coupled via a pulley belt (16), and the input shaft (15) and the gear (11) are connected via a gear group (G). Configure.

On both front and rear sides of the machine body, an idler (19) elastically mounted by a spring (18) on one end side of a track frame (17) and a crawler (3a) mounted on each wheel (20).
(3b) and (3c) (3d) are respectively deployed, but both drive wheels (2a) (2b) on both front sides are connected to both front crawlers (3a).
The drive shafts (4a) and (4b) on the rear side of (3b), and the drive shafts (2c) and (2d) on both sides of the rear are connected to the rear crawler (3c).
The front drive wheels (4c) and (4d) of (3d) are transmission-coupled through universal joints (5), respectively, and are supported by stays (21a) and (21b) in front of and behind the mission case (1). On the erected metal (22a) (22b), fulcrum shafts (23a) (23b) projecting in the front-rear direction from the middle part of the horizontal return type hydraulic cylinders (6a) (6b) can be respectively rotated. The piston rods (7a) (7b) and (7c) (7d) that extend laterally from the pistons (24a) (24b) in both hydraulic cylinders (6a) (6b). The track crawlers (3a) (3b) and (3c) (3d) are linked and linked to the inner side surfaces of the track frames (17).

Therefore, when the left and right side clutch bodies (12a) and (12b) are operated, the left side crawlers (3a) and (3c) and the right side crawlers (3b) and (3d) can perform side clutch operation and brake operation, respectively. The hydraulic cylinders (6a) and (6b) can move the fulcrum shaft (23a) (23
b) By rotating to the center, both left and right crawlers (3
a) (3b) and (3c) (3d) move up and down alternately as shown by the phantom line in FIG. 3, so that they can travel while adapting to the unevenness of the ground.

When both hydraulic cylinders (6a) (6b) are operated, the piston rods (7a) (7b) and (7c) (7d) simultaneously operate in the lateral direction, respectively, and the front crawler (3a) (3a) (3a)
b) and both rear crawlers (3c) (3d) can be rotated laterally in parallel postures, and both front and rear crawlers (3a) (3b) (3c) (3d) are shown in FIG. If you steer in the opposite direction as shown by the phantom line, you will be able to turn to the right with a small turning radius without roughening the ground, and as shown in Fig. 5, both crawlers (3a) (3b) ) And (3c) (3d) are steered in the same direction, the aircraft will be able to run diagonally forward while facing in the front-back direction.

[Effects of the Invention] As described above, the present invention is characterized in that the front and rear hydraulic cylinders (6a) (6
When b) is activated, both front crawlers (3a) (3b) and rear both crawlers (3c) (3d) can be rotated laterally in parallel postures. ) (3b) and (3c) (3d) can be steered in opposite directions to turn the ground smoothly without turning the ground down. Since the vehicle can be driven diagonally forward while facing the vehicle, the four crawlers can favorably support the machine body, and it has a feature that it can be suitably implemented as a traveling vehicle with good traveling performance.

[Brief description of drawings]

FIG. 1 is a plan sectional view of an essential part of an embodiment of the present invention, FIG. 2 shows the inside of a mission case, FIG. 3 is a side view, FIG. 4 is a plan view, and FIG. 5 is FIG. The operation explanatory drawing of is shown. (1) …… Mission case (2a) (2b) (2c) (2d) …… Drive shaft (3a) (3b) (3c) (3d) …… Crawler (4a) (4b) (4c) (4d) Drive shaft (5) Universal joint (6a) (6b) Hydraulic cylinder (7a) (7b) (7c) (7d) ... Piston rod

Claims (1)

[Scope of utility model registration request] Claims: 1. The front left and right drive shafts (2a) (2b) of the mission case (1) to the rear drive wheels (4a) (4b) of the front crawlers (3a) (3b), and the mission. The rear left and right drive shafts (2c) (2d) of the case (1) are transmitted to the front drive wheels (4c) (4d) of the rear crawler (3c) (3d) through universal joints (5), respectively. Side clutches and brakes are provided in the transmission paths of the left and right drive shafts (2a), (2c), (2b) and (2d), respectively. The tip side of the piston rods (7a) (7b), (7c) and (7d) extending left and right from the installed lateral return type hydraulic cylinders (6a) and (6b) are connected to the front crawler (3a) ( 4b crawler (3b) and rear crawler (3c) (3d) are respectively linked to each other and are configured to be linked.