JPS60222332A - Walking type cultivator - Google Patents

Abstract

PURPOSE:To prevent an engine stall occurring when a clutch gear is shifted by enabling the shifting action of a sub speed change transmission for travelling without interruption of a cultivating rotor. CONSTITUTION:Both a high speed transmission gear 11 and a low speed transmission gear 12 are mounted on the output shaft 10 of a travelling main speed change transmission 7 in such a way that said gears 11 and 12 can make relative turn in engagement with the differential case 13 of a differential mechanism 34. In addition, a speed changing wheel element 14 is mounted on said output shaft 10 to make a turn integrated with the shaft and slidable action therewith. An engagement clutch which has a clutch ratchet engaged/disengaged into/from said gears by the sliding operation of the speed changing wheel element 14 is disposed between each of the high speed transmission gear 11 and the low speed transmission gear 12 and the speed changing wheel element 14, thereby trnamitting the turning force of the output shaft 10 to the differential mechanism 34. A reduction ratio of speed transmitted from the high speed transmission gear 11 to the differential mechanism 34 is preset to a proximity value of a reduction ratio of speed transmitted from the low speed transmission gear 12 to the differential mechanism 34, whereby enabling speed change operation effected with a clutch engaged.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an auxiliary transmission transmission transmission system for traveling using a biting clutch type.
I-Relating to the walk-behind cultivator provided.

Conventionally, in the walk-behind cultivator described above, the auxiliary transmission transmission for traveling has been switched with the king clutch in the disengaged state.

Therefore, when changing the auxiliary transmission mission to increase the traveling speed to increase work efficiency or to reduce the traveling speed to prevent engine stoppage in response to changes in the tilling load, it is necessary to This prevents problems such as the engine stopping due to the tillage rotary stopping due to the need to move the rotary rotary to the ground, and the drive load when starting the tillage rotary in the soil being large. To do this, it was necessary to start the rotary on the ground and then raise and lower it to penetrate the soil.

SUMMARY OF THE INVENTION An object of the present invention is to enable switching of the auxiliary transmission transmission for traveling without stopping the tilling rotary, and to easily prevent engine stoppage.

The present invention provides the above-mentioned walk-behind cultivator. ! 1
The transmission transmission is configured so that it can be changed in the input state,
Each of the auxiliary transmission transmission and the main clutch is interlocked with a wooden operating lever, and the primary clutch is disengaged at @11 operating position, and the king clutch is input and the auxiliary transmission transmission is placed in a low-speed transmission state. 2 operating position and an 8th operating position in which the auxiliary transmission transmission is in a high-speed transmission state when the king clutch is engaged; 'ff
1K The king clutch is configured to be in the input state when the operating lever is present, and the operating lever is moved from the second operating position in #J to the first operating position without passing through the eighth operating position. It is characterized by being configured so that it can be operated, and its functions and effects are as follows.

That is, the gears can be changed while the sub-shift transmission is in the input state, and the king clutch is engaged even when the operating lever is in the second and third operating positions, or in any of these operating positions. As a result, the sub-transmission transmission can be switched while keeping the raw clutch engaged and the tilling rotary in the driving state. Furthermore, both the auxiliary transmission transmission and the king clutch can be operated using the wooden operating lever, and this operating lever can be operated from the second operating position to the first operating position without passing through the eighth operating position. If the tilling load is still abnormally large even after switching the auxiliary transmission transmission mode from high-speed transmission to low-speed transmission, change the operation lever such as when the auxiliary transmission operation lever and the main clutch operation lever are separate levers,
Even if the lever is operated from the second operating position to the first operating position, the rotary drive load is not increased and the engine stops, as in the case where the lever must pass through the eighth operating position. Therefore, it is possible to adjust the running speed according to the tilling load without having to raise and lower the tiller clutch, which would otherwise cause the engine to stop. This is advantageous in terms of operation, as it allows you to easily prevent fh by simply operating the control lever.

Embodiments of the present invention will be described below based on the drawings.

As shown in Figure 1, a pair of left and right original axes (1 m).

(lb-in) It has an engine (2), a control handle (3), etc., and is connected to a rotary tilling device (4) at the rear of the self-propelled body, and is configured to transmit power from the self-propelled body to the tilling device +41. Then, use a walk-behind tiller!

To enable the driving of the wheels (1 m2), (lb) and the tilling device (4), as shown in Fig. 2, the output of the engine (2) is transmitted through a belt tension clutch (6).
Variable speed transmission for tilling equipment that can switch between high and low speeds (
6) and a driving main transmission transmission (7) that can be switched between forward J speed and reverse 7 speed.
4a), and the output of the main transmission transmission mission (7) for driving is transmitted to the auxiliary transmission transmission mission 18) for driving which can be switched between high and low speeds, and the output of this auxiliary transmission transmission mission (8) is transmitted to The input is input to the differential lockable differential mechanism (foundation), and the output branched to the left vehicle @ (la) side and the right wheel (1b) side is sent to the steering clutch (9a) or 1j (9b).
via the left axle (85a) or the right axle (85b)
It is configured to communicate.

The traveling auxiliary transmission transmission (8) is constructed as shown in FIG.

In other words, the output shaft αO of the main transmission transmission for driving (7)
), high speed transmission gear 91) and low speed transmission gear 〇21
The gearshift shaft α is attached to the second well where the shaft is engaged with the end of the differential gear of the differential mechanism so that it can rotate relative to the Vr, and the gearshift shaft α is attached so that it can rotate and slide freely by tin twin engagement. . Then, in the darkness of the high-speed transmission gear (+1) and the low-speed transmission gear f+21, the clutch pawl (
14a) or (14b) to the recess (l1m) of the high speed transmission gear (ll) or the recess (l1m) of the low speed transmission gear (12J).
12a) is provided with an engagement clutch configured to be inserted and removed, and the rotational force of the output shaft is transferred to the differential mechanism through the transmission body (I, high speed transmission gear (11) or low speed transmission gear). and transmission wheels H.
When engaged with the high-speed transmission gear (11), a high-speed transmission state is established, and when the gear change wheel a< is engaged with a low-speed transmission gear (kuni), a low-speed transmission state is established.

The transmission reduction ratio from the high-speed transmission gear (11) to the differential mechanism diagram and the transmission reduction ratio from the low-speed transmission gear 021 to the differential mechanism example are set to similar values, and both transmission gears ( 11) It is possible to switch the engagement from one side to the other, that is, to change gears while remaining in the input state.

As shown in FIG. 8, one end of the output shaft (10) is made to protrude from the mission booth u5) to the lateral outside of the aircraft, and this protruding end is attached to an inwardly expanding brake ( 111 is attached.

Then, the operation structure for each of the main clutch (5), the auxiliary transmission transmission for traveling (8), and the brake H is set at @4.
It is constructed as shown in FIG.

That is, the auxiliary transmission transmission ( The brake (l (2)
) is biased to the brake release position # (OFF), and the six-swing type operation arm □□□ has an interlocking tool η, a spring with a long hole that allows relative displacement within the set range with this example arm. (2
Barrel, release wire □□□) and swing arm (3[1i
, the operating levers (31) made of wood are attached to the operating handle (3) via the support shaft (to) so as to be swingable, and the operating levers (31) are moved as shown in Fig. 6. By swinging the lever guide (33) shown along the guide groove, the main clutch (5), sub-shift tension (8) and brake (IQ) can be operated in conjunction as follows.

When the operating lever H is moved to the first operating position, the release wire 0 is in tension and the primary clutch (5) is in the disengaged position, and the release wire is in tension and the auxiliary transmission transmission (8) is activated. is in a low-speed transmission state, the release wire 291 is in a relaxed state, and the brake is released.

When the operating lever (241) is moved to @22 operating position fBl, the release wire (19) is relaxed and the main clutch (5) is input, and the release wire (241) is in tension and the auxiliary transmission transmission (8) is activated. is in a low-speed transmission state, the release wire is in a relaxed state, and the brake α is in a brake release state.

When the operating lever (31) is moved to the 8th operating position (@), the release wire 0 is further relaxed, the main clutch (5) is engaged, the release wire is loosened, and the sub-shift mission (8) is set to high speed. The transmission state is established, the release wire 4 is in a relaxed state, and the brake α is in a brake release state.

When the operating lever (31) is moved to the 4th operating position (excellent), the release wire (I9) is pulled and the main clutch (
5) is turned off, the release wire (241) is put into a tensioned state, and the auxiliary transmission transmission (8) is put into a low-speed transmission state, and the release wire (b) is put into a tensioned state, and the brake is put into a braking state.

The operating lever kl) is configured to be able to swing in the lateral direction of the aircraft with respect to the attachment boss portion (81m) to the support shaft, and the operating lever 01) is attached to the receiving portion (88a) of the lever guide link. Also u (88b) or (88c) or (aS
a) V said operating positions (4), (BI I
(C1*old) and support each of the main clutches (5
), the auxiliary transmission transmission (8), and the brake (I9) are each maintained in a predetermined state.

Then, the operating lever (31) is at the second operating position fBl.
and the eighth operating position (Q), and the release wire (19) is in a relaxed state so that the second lever (5) is in the engaged position. This is done so that the transmission transmission (8) can be switched without stopping the drive of the tiller (4).

Move the operating lever (3I) from the second operating position [(Bl to the first
8th operating position (1st to 8th operating position, fB) so that operation can be performed without passing Q.
, the arrangement of the guide grooves and the shape of the guide grooves are configured so that the main clutch (5) can be disengaged without changing the aircraft from a low-speed running state to a high-speed state.

Raw clutch ff13, auxiliary transmission mission for driving (8)
In order to enable the above-mentioned linked operation using one operating lever of brake 4, the operating lever "-@l) is constructed so that it can be operated in the cross directions of the front and rear directions and the lateral direction of the aircraft, and The main clutch (5) and brake 09) are operated by swinging the lever (31) in the longitudinal direction, and the auxiliary transmission transmission (8) is operated by swinging the operating lever @l) in the lateral direction. As shown in Figure @7, the first to fourth operating positions (4), tBl @
(C1, (D) may be arranged and an operation route may be formed.

[Brief explanation of the drawing]

The drawing shows an example of a walk-behind tiller according to the present invention, @1
Figure 2 is an overall side view, Figure 2 is a block diagram of the transmission light, Figure 8 is a sectional view of the auxiliary transmission transmission for traveling, Figure 4 is an operation system diagram, and Figure 5 is a front view of the auxiliary transmission transmission operation section. FIG. 6 is a plan view of the operating lever guide, and FIG. 7 is a plan view of another embodiment of the lever guide. (5) Main clutch, (8) Sub-transmission transmission for driving, Turning... Operation lever,
(A)...First operation position, (B)...
Second operation position, (C)...Eighth operation position. Agent Patent Attorney Osamu Kitamura

Claims (1)

[Claims] A walk-behind cultivator provided with an auxiliary gear transmission transmission (8) for traveling using a biting clutch type, the auxiliary transmission transmission (8)
The main clutch (6) is disengaged when the sub-shift mechanism (8) and the main clutch (5) are respectively interlocked with the wooden operating lever (31). a first operation position (4) in which the raw clutch (5) is engaged and the auxiliary transmission transmission (8) is in a low-speed transmission state;
5) is engaged, the sub-transmission transmission (8) suddenly turns orange in a high-speed transmission mode @88.
31) and the second operating position [(B) and the @8
The raw clutch (6) is configured to be in the engaged state when the operating lever H is present between 8 operating positions 11(0), and from the operating lever Ht to the second operating position @(B). The walk-behind tiller is configured to be operable without passing from the first operating position to the eighth operating position (0).