JPS627028B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steering clutch device for a power vehicle, which interrupts and brakes the power for left and right travel to allow the vehicle to turn.

In a known technique such as Japanese Utility Model Application Publication No. 53-7036, a brake gear fixed to an interlocking case that can be engaged with the side clutch is provided in the middle of the switching operation process between forward rotation interlocking and reverse rotation interlocking of the side clutch gear. When the steering clutch is disconnected by operating this side clutch gear, braking is performed by engaging with the brake gear, and when operating from reverse rotation to forward rotation interlocking side, etc., the side clutch gear must be in this state. Since the clutch gear meshes with the brake gear, the rotation of the clutch gear is suddenly fixed to the interlocking case, and the wheels are once completely stopped and cannot rotate in any direction. It was easy for strain to occur between the brake gear and the brake gear.

The present invention eliminates such an unreasonable side gear clutch gear switching operation, makes the operation easier and smoother, and improves work efficiency such as turning. Embodiments of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a transmission installed in a case 3, which transmits the power of an engine (not shown) transmitted by a pulley 5 from an input shaft 7 to high-speed, medium-speed,
It is used to change the speed to low speed, reverse rotation, etc. and transmit it to the intermediate shaft 9, and its structure and operation are the same as those normally used, so a detailed explanation will be omitted here. A steering clutch shaft 11 is rotatably provided parallel to the intermediate shaft 9, and a main gear 13 is rotatably fitted in the center thereof. The main gear 13 is always engaged with a gear 15 fixed to the intermediate shaft 9. 17,1
Reference numeral 7 denotes a clutch body rotatably and slidably provided on the steering clutch shaft 11, and is provided on both sides of the main gear 13. clutch body 17
Steering clutch devices 21 for cutting off the power of the axle 19, braking, etc. are provided on the left and right sides, respectively. Since the left and right steering clutch devices 21 have the same configuration and function, the left steering clutch device 21 will be described in detail, and the right steering clutch device 21 will be omitted. That is, a locking gear 23 is provided at the inner end of the clutch body 17, and is provided so as to be freely engageable with internal toothed locking portions 25, 27 provided on the inner diameter portion of the main gear 13. The internal tooth locking parts 25 and 27 are arranged side by side in the inner and outer directions of the main gear 13, and a floating part 29 in which the locking gear 23 freely moves is provided at an intermediate position. Reference numeral 31 denotes a forward rotation gear device provided between the steering clutch shaft 11 and the axle 19, which includes a gear 33 fixed to the outer end of the clutch body 17, and a gear 35 fixed to the axle 19 and engaged with the gear 33. It becomes more. 37
is a reversing gear device provided between the steering clutch shaft 11 and the axle 19, such that a gear 39 fixed to the axle 19 engages with the locking gear 23 via a reversing gear 43 fixed to the reversing shaft 41. It is provided. When the clutch body 17 is moved inward, the locking gear 23 is engaged with the internal toothed locking portion 25, and the gear 33 is engaged with the gear 35. When the clutch body 17 is in the intermediate position, the locking gear 23 is in the idler part 29 and the gear 33
is engaged with gear 35. When the clutch body 17 moves to the outward position, the gears 33 and 35 are disengaged, and the locking gear 23 is in a position where it engages with the internal tooth locking portion 27 and the gear 43, and reverse rotation is performed. It is configured to be
45 is a bullet that presses the clutch body 17 inward. Reference numeral 47 denotes a clutch shifter which is fixedly attached to a shaft 49 in the case 3 and is swingable. An engaging piece 51 provided at the end engages with a groove 53 provided in the circumferential direction of the clutch body 17, and the clutch shifter 47 is pivotably provided in the case 3. Clutch body 1 due to movement
7 in a reciprocating manner. 55 is a clutch arm that is fixed to a shaft 57 rotatably provided in the case 3; 59 is a cam that is fixed to the shaft 57; the arm rotates as the clutch arm 55 swings and is fixed to the shaft 49; 61 to press and swing. A clutch wire 63 is connected to an end of the clutch arm 55, and the other end is connected to a steering clutch lever (not shown). 65
is a braking device provided in the brake drum 67 fixed to the end of the steering clutch shaft 11, and
By swinging a brake arm 71 fixed to a rotatably provided shaft 69, the brake drum 67 is pressed from inside to perform braking.
Reference numeral 73 denotes a rod that is slidably supported in the case 3 in the vertical direction, and its lower end is connected to the brake arm 71, and by moving upward, the rod 73 engages the braking device 65.
brakes. 75 is a shaft 77 at the upper end of the rod 73.
The engagement piece is pivotally mounted to be able to swing up and down, and its upward movement is restricted by the locking piece 79, and it engages with the end of the clutch arm 55. 81 is the engagement piece 75
This is a projectile that urges the ball to swing upward.

In this way, the braking device 65
By operating 7, braking can be performed after the forward rotation is shut off, and after this braking is released, the reverse rotation interlocking operation can be performed, and the reverse rotation interlocking operation can be performed from the reverse rotation interlocking without going through braking. The related operations are configured to obtain the desired results.

In the above configuration, when the clutch body 17 moves inward and the locking gear 23 is in the position engaged with the internal tooth locking portion 25, the clutch body 17 moves from the input shaft 7 to the transmission device 1.
The power that has been appropriately shifted and transmitted to the intermediate shaft 9 is transmitted from the gear 15 to the main gear 13,
The axle 19 is rotated forward through gears 33 and 35. Therefore, the aircraft travels straight ahead. Next, when the steering clutch lever (not shown) is operated to move the clutch body 17 to the intermediate position, the locking gear 23 comes to the position of the idler part 29, and the main gear 13
Although the power from the steering clutch shaft 11 is cut off,
and the axle 19 are interlocked via gears 33 and 35. At the same time, as the clutch arm 55 is raised, the rod 73 is raised by the engagement piece 75 that is engaged with the end of the clutch arm 55, and the braking device 65 operates to brake, so that the left axle 19 is braked. Accordingly, by running the right axle 19, the machine body turns to the left about the left running gear. Next, the steering clutch lever (not shown)
When the clutch body 17 is further moved outward, the locking gear 23 engages the internal tooth locking portion 27 and the reverse gear 43 at the same time, and the gear 33 is disengaged from the gear 35 to move to the left side. axle 19
is reversed. Therefore, the normal rotation of the right axle 19 causes the aircraft to turn to the left about the center of the aircraft. At this time, the end of the clutch arm 55 is in a further raised position beyond the engagement piece 75, and the rod 73 is lowered to release the brake. When the steering clutch lever (not shown) is returned to its original position and the clutch body 17 is moved inward, the end of the clutch arm 55 swings the engagement piece 75 downward against the bullet 81. It moves, leaves, and returns to its original position.

As described above, the present invention provides, between the steering clutch shaft 11 and the axle 19, a forward rotation gear device 31 that rotates the axle shaft 19 in the forward direction and a reverse rotation gear device 37 that rotates the axle shaft 19 in the reverse direction. A main gear 13 that constantly transmits power and the steering clutch shaft 11
By engaging with and reciprocating in the axial direction, the meshing with the forward rotation gear device 31, the reverse rotation gear device 37, etc. is switched, and forward rotation to power to the axle shaft 19 is performed.
A pair of left and right clutch bodies 17 are provided for switching between reverse rotation and cutoff, and each clutch body 17 is braked in a state in which the clutch body 17 is disconnected from the forward rotation gear device 31 and is in the normal rotation cutoff state, and the clutch body 17 is provided with 37
A braking device 6 which is operated in conjunction with the relationship in which no braking is applied by switching from meshing with the forward rotation gear device 31 to the forward rotation gear device 31.
Since this is a steering clutch device for a power vehicle equipped with a steering clutch lever 5, it is possible to perform a turning movement in which the vehicle turns around the driving device and a spin turn turning in which it turns around the center of the vehicle by using the steering clutch lever in one direction. It can be switched by operation, and can be easily operated and turned in a narrow space, thereby improving work efficiency.

Furthermore, the structure is such that power is transmitted from the central gear during both forward rotation and reverse rotation, and when switching from the steering clutch disengaged state to the reverse rotation linked state, the braking device is activated once to fully control the turning side wheel. Since the vehicle is braked and then reversed, it is possible to eliminate the risk of the vehicle suddenly retreating or being swung backwards or sideways due to reverse rotation of the wheels. Further, when switching from the reverse rotation state to the steering clutch disconnection or normal rotation state, this braking does not work, so the switching operation can be performed smoothly and the turning operation can be performed quickly. When switching the wheels from forward rotation to reverse rotation, and from reverse rotation to forward rotation, the steering clutch is once disconnected, so the aircraft is stopped, and the rotation of the interlocking gears for the wheels also stops. However, even if this interlocking movement due to the rotation of the wheel has a gear attached to it, the wheel is not driven by power and is in a freely rotatable state, so the clutch gear is attached to this interlocking gear in the opposite direction. Even when the wheels are engaged by rotation, the wheels stop temporarily, but are immediately rotated in the direction of rotation in which the clutch gear is engaged due to this switching, so it is difficult to force the interlocking gears etc. to become suddenly locked, and safe operation is ensured. It can be carried out. In addition, the speed of normal rotation, which is forward movement, is generally higher than that of reverse rotation, which is movement backward, and it is used more frequently, so it is effective when braking from normal rotation to reverse rotation.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented in other embodiments as well.

[Brief explanation of the drawing]

FIG. 1 is a front cross-sectional explanatory view of one embodiment of the present invention, and FIGS. 2 and 3 are perspective explanatory views showing the operating state of the main parts, respectively. (Explanation of symbols representing main parts of drawings), 1
1... Steering clutch shaft, 17... Clutch body, 1
9... Axle, 37... Reversing gear device.

Claims (1)

[Claims] 1. A forward rotation gear device 31 that rotates the axle shaft 19 in the normal direction and a reverse rotation gear device 37 that rotates the axle shaft 19 in the reverse direction are provided between the steering clutch shaft 11 and the axle shaft 19, and a constant transmission gear is provided at the center of the steering clutch shaft 11. main gear 13
By fitting into the steering clutch shaft 11 and reciprocating in the axial direction, the forward rotation gear device 31
A pair of left and right clutch bodies 17 are provided for switching between forward rotation, reverse rotation, and cutoff of power to the axle shaft 19 by switching the engagement with the reverse rotation gear device 37 and the like. Braking is performed in the state where the forward rotation is cut off from the forward rotation gear device 31,
A steering clutch device for a power vehicle, comprising a braking device 65 which is operated in conjunction with the reversing gear device 37 so that no braking is applied by switching from meshing with the reversing gear device 37 to the forward rotating gear device 31.