JPS6231759A - Automatic traveling speed change gear for agricultural vehicle - Google Patents

Abstract

PURPOSE:To simplify a structure by forcing the speed change control of a speed change gear for traveling use, which is interlocked with the ascent and descent of a working device, to operate by changing the clearance between split pulley sections. CONSTITUTION:A pulley 23 around which transmitting belts 10, 11 wound is composed of the first split pulley section 25, the second pulley section 26 which is so mounted on a working shaft 5 that it may be rotated together but free in sliding and the third split pulley section 2. Clearances between respective pulleys are changed by a speed-change can device 31 so as to be changed for high speed or low speed. The speed-change can device 31 is provided with such an interlocking mechanism 32 as will be operated to the low speed side when a working device 3 is lifted and to the high speed side when it is lowered. For this reason, an exclusive particular speed change gear for automatic speed change can be made unnecessary.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a pair of transmission belts with different transmission ratios, and a pair of transmission belts that individually switch the transmission belts into a tension transmission state and a relaxation transmission stop state. A traveling transmission device is provided, which is configured to change speed by manually switching between a working state and a releasing state of a pair of said tension applying systems, and is configured to change the speed by a manual switching operation between a pair of said tension applying states and a non-working state, and also to provide a self-propelled aircraft with a driving speed. Pl-Relates to a self-help transmission for an agricultural vehicle that can be operated in a freely lowered manner.

[Conventional technology]

& Traditionally, when the work equipment is raised, the travel speed is automatically reduced, and when the work equipment is lowered, the travel speed is automatically restored to high speed, allowing safe turning at low speeds. For example, in order to make it possible to eliminate the need for special effort for gear shifting, for example,
The method disclosed in Publication No. 91109 was adopted. That is, a dedicated traveling transmission device for self-wJ shifting is provided, which has the following disadvantages.

[Means for Solving the Problems of the Invention] In other words, a special variable M device for the own crocodile speed is required, which increases the cost.

SUMMARY OF THE INVENTION An object of the present invention is to enable the above-mentioned WJ shift to be carried out without having to use a special shift gear shift, and to provide a structure for this purpose with a simple structure.

[Means for solving problems]

Feature 1 of the self-driving transmission device for agricultural vehicles according to the present invention! Configuration a is a first split pulley part in which the pulleys around which the pair of transmission belts are wound are housed around the transmission #J shaft so that they can only rotate integrally, and the first split pulley part is It consists of a second split pulley part and a third split pulley part, which are located on the same side and are attached to the transmission shaft so that they can be turned and slid freely, and the second split pulley part and the third split pulley part in mfJ. By sliding the pulley portions, the distance between the first split pulley S portion and the second split pulley portion and the distance between the second split pulley portion and the 583 split pulley portion are changed for high speed and low speed. One speed change cam mechanism is attached to the pulley, and the work device is raised and lowered so that the speed change cam mechanism is operated to a low speed side when the work device is raised and to a high speed side when the work device is lowered. The purpose of this invention is to provide a link #1 mechanism linked to the service mechanism, and its functions and effects are as follows.

[For production]

Even if either of the pair of power transmission belts is in the pre-tension state, the one for high-speed transmission or the one for low-speed transmission, when the work equipment is raised, the speed change cam mechanism automatically moves to a low speed by the linked WJ mechanism. When the belt winding is operated to the side and the diameter of the belt winding is on the deceleration side, the interval corresponding to the boule s is changed to adjust the speed of the traveling transmission to the deceleration side, and when the working device is lowered, The speed change cam mechanism is automatically operated to the high speed side by the interlocking mechanism, and the interval between the split pulley portions is changed so that the diameter of the belt winding is on the high speed side, and the traveling transmission is adjusted back to the high speed side.

When changing the speed of the traveling transmission in conjunction with the lifting and lowering of the work equipment by changing the interval between the split pulley parts,
When the speed change cam mechanism is attached, compared to a configuration in which the tension is applied by adjusting the tension applied to the transmission belt, the tension is applied by coordinating manual operations. The structure for interlocking the traveling transmission and the mechanism for lifting and lowering the working device is simplified.

When the belt pulley is connected to the split pulley and the split pulley part is slid by the speed change cam mechanism, force 2 is used as the split pulley part for sliding assistance, and the third split pulley part is used as the split pulley part for fixing. By placing the distribution portions on both sides of the first split 9 part as a gear shifting cam mechanism,
A set of cam mechanisms is required to act separately on the second split pulley portion and the third split pulley S portion, but
If both of the split pulley parts are placed on the opposite side of the first split pulley part, only one speed change cam mechanism is provided, and the operating force of this is only applied to one of the second and third split pulley parts. By transmitting the signal to the other side through the transmission, it is possible to operate both the second and third split pulley parts. [Effects of the Invention] The speed change adjustment of the traveling transmission is performed as the working device moves up and down. Even though automatic driving gear shifting is performed in conjunction with f\-operation device valve lowering, the driving gearshift device originally provided for manual gear shifting is used as the gear shifting device for #J gear shifting. By doing so, it is possible to avoid the need for a special transmission device exclusively for the cut-off transmission, and to have the transmission device and the operating mechanism adjacent to each other with a simple structure for the interlocking structure of the lifting mechanism. Since the variable speed cam mechanism can be replaced with just one, the structure can be made extremely simple and economically advantageous.

〔Example〕

As shown in section +, there is a hydraulic cylinder at the rear of the wheeled self-propelled aircraft, and a link mechanism (via 22K gold) that can be operated up and down to swing up and down.
In addition to connecting 31, a device (3
It is configured so that one transmission is transmitted to the other, and the Toyo-type aircraft is constructed.

As shown in Figure 1, the output shaft (5) of the engine +41 and the input shaft (9) of the transmission (8) for the front wheels (6) and rear wheels (7) are connected in succession via a multi-disc clutch 12. The pulley (μ and
The first transmission belt tlcl+ and the second transmission belt Ill are wound in such a manner that the transmission reduction ratio by the first transmission belt (1.1ull) is smaller than the transmission reduction ratio by the second transmission belt (11). 1~. And the first transmission crocodile belt 1ltl
1st import t121 as tension imparting to +
．． And, the support arm (1
A swingable V is housed in the fuselage part via 4I or 051, and a pair of 7 rings (I6!, U) is configured to be biased separately to the action side by the U force.
iQ record both support arms (15j) By manipulating the variable speed change control lever u91 which can be turned quickly through the VC Renzen Iso structure, the two wheels (l and y) are operated to change speed. 7, which constitutes a traveling sub-transmission device (4)).

That is, when the speed change operation lever (19) is operated to the lth operation position N, both wheels (lZ, a3) are in the deactivation state, and both transmission bells) tM and (river are both in the transmission stop state). The ridge becomes slack and reaches a state of cutting.

When the shift operation lever (I9) is operated at the second operating position, only the first wheel body 02I is switched to the operating state, and only the first transmission belt 17i is operated. When the gear shift operation lever is moved to the third operation position tLJ, only the second unit 4 is in the operating state.
Instead of the VC man, only the second transmission belt (+1) is operated tightly by the transmission-like expansion and becomes a low-speed transmission state.

llJ 1st and 2nd Book l-lur, (11
A goo IJ with an output shaft (6) V attached to wind the
As shown in Fig. 2, tli is connected to the output shaft (bl) by spline engagement, and is connected to the tension of the first transmission belt VllJ+'E or the second transmission belt (Ill) so that it rotates integrally with the output shaft (bl). A first split pulley part which is fixed in a non-slidable manner by twisting and e, and a second split pulley part +261 and a third split pulley part which are VC'd so as to be able to slide in the same way as the first split pulley part. For each part η, f# is formed and tD. In other words, the first ↓ Ririguri part ・
2FA and 2nd split pulley part: m and 1st delivery bell)
1. The pulley for the lur is connected to the second pulley part (to) and the third split pulley part (b) to the second transmission bell h.
The pulley for (ll) is largely constructed.

As shown in Fig. 2, the fixed side cam rod fixed to the engine (4) and the relative rotation and sliding VJ measurement cam attached to the output shaft (6) via the bearing 129).
Accordingly, the transmission cam mechanism 1311 is configured to operate the sub-transmission device (20), which has a large number of poor high-speed transmission conditions and poor low-speed transmission conditions, into two high and low speed f speeds.

In other words, the movable side force t) is cut, and the proximal side force t
When the side convex part of the fixed side cam protrusion enters the both concave parts of the fixed side cam ring, when the first transmission bell l- (lur) is in the tension transmission state, the first transmission bell l- densuke belt tlo
Due to the + tension, the 2nd split rib part 0 becomes the 2nd split rib -
The split pulley part (c) is separated from the first split pulley part (c) along with the split pulley part (c), and the distance between the first split pulley part (c) and the second split pulley part (c) is adjusted to be larger. l
-Ql is in a tense state, as shown by the solid line in Fig. 3, due to the tension of the second transmission bell) (It), i'
in 3rd 'J! Only the I pulley part is the first split pulley.
The distance between the second split pulley part and the third split pulley part ρη is increased and adjusted to a larger distance, and in either case, the diameter of the belt wrapped around the pulley A is made smaller. As a result, the speed becomes slow and sudden. and,
When the side convex part of the movable side cam (side) rises up to the side convex part of the fixed side cam (c), it slides off due to this coming up (9).
When the QOI is in a sudden tension state, the end of the second split pulley is moved to the third split pulley by the moving cam (30) via the bearing 4. With Boo IJ 8 minutes (B), the first split pulley part (251) is approached, and the interval between the first split pulley S quarter and the end of the second split pulley part is restored to the original small interval, and the second transfer belt (If there is a tension-like sudden VC, only the 3rd split pulley part (B) will be brought closer to the 1st split pulley part and the 2nd split pulley part will come closer to the 2nd split pulley part, as shown by the imaginary line in Figure 3. The interval between the parts of the third split pulley is adjusted back to the original small interval, and in either case, the diameter of the belt wrapped around the pulley (c) becomes larger and the original high-speed state is suddenly restored.

lIJ marking oJ cutting side cam mark j is interlocked with gIJ marking mechanism t21 via the release wire S force as an example of an interlocking mechanism with @ashing link (2a), and for seedling planting, the device +3+ is self-propelled. When the machine is lowered to the working level, the link (2a) swings downward between the self-propelled body parts and pulls the release wire 3η, as shown by the thick line in FIG. Link for side cam example (2a)
Due to the rocking force of the device (3), it is automatically rotated to the high-speed operating position, and when the device (3) is suddenly raised above the ground for seedling planting, the device (3) is raised as shown by the imaginary line in Figure 1. , the above link (2
a) swings upward with respect to the self-propelled body parts and loosens the three release wires, so that the Mf cut side cam example is the first transmission belt! 10 or the second transmission bell) (11) self-helpingly turned to the master position for low speed (10), (1)
It is configured to be operated with 1J. In other words, regardless of whether the sub-transmission device c20) is in the high-speed transmission state or the low-speed transmission state, the traveling speed is automatically adjusted to reduce the speed when planting seedlings by simply raising the gear yti31, and the seedling planting is performed using the device. (3) Just by lowering the vehicle, the traveling speed is automatically restored to the original high speed.

[Another example]

The belt pulley on the transmission (8) side may be configured as a split pulley, and the output shaft (5i is referred to as a transmission shaft (61).

For planting seedlings, the device 131 can be changed to a fertilizing device, a spreading device, a tiller, etc., and these are collectively referred to as working devices.

[Brief explanation of the drawing]

The drawings show an embodiment of the automatic driving transmission for an agricultural vehicle according to the present invention, and FIG. 1 is a side view of the transmission, FIG. 2 is a side view of the transmission, and FIG. 4
FIG. 8 is a cross-sectional view of the belt pulley, and FIG. 4 is a side view of the entire honor type rice machine. (2)... Mechanism for lifting and lowering work equipment, (5)...
...Transmission shaft, (101.
・・Tensioning, rigid ・・・Transmission device, ・
...Pulley, V(2)...First split pulley part, 弼...Second split pulley part, ? η・・
...3rd split pulley part, 3rd gear...f-speed cam mechanism, 3rd gear...interlocking mechanism.

Claims (1)

[Claims] A pair of transmission belts (10) and (11) with different transmission ratios
), and a pair of tension imparting tools (12) and (13) for respectively switching the pair of transmission belts (10) and (11) into a tension transmission state and a relaxation transmission stop state, A traveling transmission (20) configured to change gears by manually switching the attachments (12) and (13) between the activated state and the deactivated state is provided, and the self-propelled aircraft is equipped with a working device (3). This is an automatic transmission for an agricultural vehicle in which a pair of transmission belts (10) and (11) are connected to each other so that they can be raised and lowered, and the pulley (23) around which the pair of transmission belts (10) and (11) are wound can only be rotated integrally with the transmission shaft (5). The first split pulley part (25) attached to this first split pulley part (25)
a second split pulley portion (26) mounted on the transmission shaft (5) so as to be integrally rotatable and slidable on the same side as the transmission shaft;
and a third split pulley portion (27), and the second
Split pulley part (26) and third split pulley part (27
) by sliding the first split pulley part (
25) and the second split pulley portion (26), and the second split pulley (26) and the third split pulley portion (26).
A single speed change cam mechanism (31) for changing the interval between 27) between high speed and low speed is attached to the pulley (23), and the speed change cam mechanism (31) is moved when the working device (3) is raised. An automatic farm vehicle equipped with an interlocking mechanism (32) interlocked with the working device lifting mechanism (2) so that the working device (3) is automatically operated to the low speed side and to the high speed side when the working device (3) descends. Travel gearbox.