JPH10225204A - Backward movement restrictive device in controlling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a backward movement restrictive device capable of facilitating release at a handle opposite position and preventing application from being forgotten at the time of returning a handle from an opposite position to a normal position. SOLUTION: In a controlling machine for which an engine is loaded to a machine body front part, a rotary cultivation device is attached to a machine body rear part, a speed change lever 8 freely swingable with a pivotally supporting part as a center is disposed and the handle is made freely switchblade to the normal and opposite positions, a shaft slid by speed-changing the speed change lever 8 to a backward movement speed and the shaft for turning ON/OFF the rotary cultivation device are linked through a connection member and the connection member is made releasable only at the time of the handle opposite position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reverse braking device provided when a rotary tilling device is connected to a management machine to perform tilling work.

[0002]

2. Description of the Related Art Conventionally, in a management machine for performing a rotary tilling operation by attaching a rotary tilling device, considering a safety of an operator, when a handle is in a normal position, a shift lever is moved backward while a rotary tilling claw is rotating. The reverse traction device operates so that the rotary tilling claw stops when the gear is shifted to high speed, and when the shift lever is shifted to reverse speed and the rotary clutch lever is turned on, the shift lever deviates from reverse speed. It is configured.

[0003]

However, in the above-described management machine, it is necessary to easily release the reverse control device when the handle is reversed, and the rotary tilling is performed at the handle reverse position. After the work, when the handle is returned to the normal position again, there is a problem that the reverse check device is forgotten to be used, and there is a problem that the safety aspect of the worker cannot be sufficiently secured. Therefore, the present invention is to easily release the handle in the reverse position, and, after the rotary tilling work in the reverse position of the handle, when returning the handle to the correct position, ensure that the handle is engaged, that is, forget to put the handle in the correct position. It is an object of the present invention to obtain a reverse check device capable of eliminating the occurrence of a problem, and to ensure the safety of an operator during a rotary tilling operation.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides the following reverse control device in a management machine. In other words, in a management machine in which an engine is mounted in front of the fuselage, a rotary tilling device is mounted in the rear of the fuselage, a shift lever that is swingable around a shaft support is provided, and a handle is configured to be switchable between forward and reverse positions. The shaft that slides by shifting the shift lever to the reverse speed and the rotary tilling device are turned on.
A reverse check in the control device, wherein the shaft to be turned off is configured to be linked via a connecting member, and the connecting member is configured to be released only when the handle is in the reverse position. Device. Further, only when the connecting member is formed of a pin and the handle is in the reverse position,
The pin is configured to be able to protrude from near the handle base, and the pin protruding from near the handle base is
A parking means which can be parked in a protruding state is provided.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 is an overall side view of the management machine to which the rotary tilling device is attached.
A transmission case (2) is disposed behind the transmission case (2). The transmission case (2) accommodates the traveling transmission section (3) and the rotary transmission section (4), and the engine (1) and the transmission case (2). ), A power transmission case (5) is interposed, and the power from the engine (1) is transmitted through the power transmission case (5) to the transmission case (2).
The transmission is transmitted to the traveling transmission section (3) and the rotary transmission section (4). A lower end of the transmission case (2) extends downward to support a traveling shaft (6), and a traveling wheel (7) is provided on the traveling shaft (6) so as to be linked to the traveling transmission unit (3). The forward / reverse or high / low speed switching is performed by the provided shift lever (8).

On the other hand, a rotary portion (B) is provided at the rear of the transmission case (2), and a rotary transmission case (9) projects rearward from the upper rear side of the transmission case (2). I have. A claw shaft (10) is mounted on a lower end of the rotary transmission case (9), and a tilling claw (11) is continuously provided on the claw shaft (10). The power that has been subjected to a speed change operation such as high / low speed switching from the rotary transmission section (4) in the transmission case (2) is transmitted to the pawl shaft (10) via the rotary shaft (26) in the rotary transmission case (9). The tillage claw (11) is rotated and driven.

A rotary frame (12) constituting a frame of the rotary portion (B) is provided at a rear portion of the transmission case (2), and a rotary cover for covering a tilling claw (11) above and on the left and right sides thereof. (13) is provided, and a tail wheel (14) is vertically suspended at the rear of the rotary frame (12) so as to be able to move up and down. In addition, a handle support rod (15) is provided above the transmission case (2).
Are provided so as to be switchable in the front-rear direction, and a handle (16) is continuously provided at the end thereof. The handle (16) is provided with an accelerator lever, a main clutch lever, a rotary clutch lever, and the like, and the transmission case (2) is provided with a rotary high / low speed switching lever, a shift lever (8), and the like. The handle position in FIG. 5 is the handle normal position, the position where the handle is switched forward is the handle reverse position, and in FIG. 3, the position (a) is the handle normal position and the position (b) is the handle reverse position. It is.

In the rotary transmission section (4), as shown in FIG. 4, a high / low speed switching gear (18) is mounted on a main transmission shaft (17) shown in FIG.
A rotary output shaft (19) connected through a rotary clutch lever, a rotary clutch fork shaft (21) connected to a rotary clutch lever, and a rotary fork shaft (22) for high / low speed switching connected to a rotary high / low speed switching lever. is there. A high / low speed switching gear (18) and a clutch pawl (23) are spline-fitted to the rotary output shaft (19), and a bevel gear (2) is provided beside the clutch pawl (23).
4) is loosely fitted to the rotary output shaft (19). A rotary bevel gear (25) is meshed with the bevel gear (24).
5) is connected to the upper end of a rotary shaft (26) casingd in a rotary transmission case (9), and the lower end of the rotary shaft (26) is interlockedly connected to a pawl shaft (10).

The fork (27) connected to the rotary clutch fork shaft (21) is connected to the clutch pawl (23), and the fork (27) is moved by the sliding operation of the rotary clutch fork shaft (21). Through the clutch claws (2
3) is slid along the rotary output shaft (19) and meshed with the bevel gear (24), and the rotary shaft (26)
To transmit rotational power to A high / low speed switching gear (18) spline-fitted to the rotary output shaft (19) has a high / low speed switching rotary fork shaft (2).
A high / low speed switching fork (28) connected to 2) is connected, and the high / low speed switching gear (18) is rotated via the fork (28) by the sliding operation of the rotary fork shaft (22). By sliding along (19), the meshing of the main transmission shaft (17) with the output gear (29) is switched to perform high / low speed switching of the rotary shaft (26).

The speed change lever (8), which is configured to be swingable about the shaft support (8a) shown in FIG. 1 and is mounted near the handle support rod (15), has a handle support rod (15). Handle base (20) to which is attached
The swing operation is performed along a guide groove (30) provided in the vicinity, and the shift lever (8) moves along the guide groove (30), thereby switching the forward speed and the reverse speed of the management machine. Is performed. As shown in FIG. 6, the guide groove (30) has a horizontal H-shape, and has a first forward speed (F1), a second speed (F2) switching groove (30a), a third forward speed (F3) and a reverse travel. Neutral groove (30c) between switching groove (30b) of speed (R)
It is what was communicated with. Therefore, the shift lever (8)
Is operated along the guide groove (30), and the shift lever (8)
Is swung downward, the first forward speed (F1) and the second forward speed (F2)
) Swings upward to obtain a third forward speed (F3) and a reverse speed (R), respectively.

In the management machine as described above, the present invention provides:
When the speed change lever (8) is shifted to the reverse speed (R) while the rotary tilling claw (11) is rotating with the handle (16) in the normal position, the rotation of the rotary tilling claw (11) stops, and When the rotary clutch lever is turned on and the rotary tilling claw (11) is driven with the speed change lever (8) being shifted to the reverse speed (R), the speed change lever (8) is changed from the reverse speed (R). The reverse restraint is configured to be disengaged, the reverse restraint is easily released at the reverse handle position, and cannot be released at the normal handle position, and the handle is returned from the reverse position to the normal position. Sometimes, make sure you do n’t forget
This ensures the safety of workers during rotary tilling work.

That is, as shown in FIGS. 1 and 2, a guide shaft (31) is mounted in a transmission case (2) so as to be parallel to and above the rotary clutch fork shaft (21). And the guide shaft (3
1) a guide portion (8) provided below the speed change lever (8).
According to b), when the shift lever (8) is shifted to the reverse speed (R), it is configured to be slidable in the machine body width direction. Then, a hole (31a) is formed in the guide shaft (31).
A hole (21a) is formed in the rotary clutch fork shaft (21), and a pin (32) as a connecting member is connected to the guide shaft (3).
The rotary clutch fork shaft (21) and the guide shaft (31) are inserted into the hole (31a) of the rotary clutch fork shaft (21) while being fitted and supported in the hole (21a) of the rotary clutch fork shaft (21). It is configured to work together via.

The pin (32) is projected from the upper part of the transmission case (2), and as shown in FIG.
Handle support rod (15) only at handle reverse position
Is configured to be able to protrude from above the handle base (20) near the base. The upper part of the transmission case (2) and the handle base (20) are moved so that the pin (32) can move as the rotary clutch fork shaft (21) and the guide shaft (31) slide in the machine width direction. Elongated holes (2a) (20a) are formed in the upper part. Further, when the pin (32) is moved upward so as to protrude from the upper portion of the handle base (20), the parking means () which can park the pin (32) at a predetermined position in the protruding state. 33) is provided on the handle base (20) or the like. When the pin (32) moves upward, the engagement with the rotary clutch fork shaft (21) is released, and the interlock between the guide shaft (31) and the rotary clutch fork shaft (21) is released.

With such a configuration, when the speed change lever (8) is shifted to the reverse speed (R) while the rotary tilling claw (11) is rotating at the handle normal position, the lower portion of the speed change lever (8) is provided. The provided guide portion (8b) presses the end face of the guide shaft (31) to slide the guide shaft (31) rightward in the front view of FIG. 1, and is connected via the pin (32). Rotary clutch fork shaft (2
1) is slid in the same direction to release the engagement between the clutch pawl (23) connected to the fork (27) and the bevel gear (24), and the transmission of rotational power to the rotary plow (11) is stopped. It can be disengaged, i.e., the clutch "disengaged".

Conversely, when the speed change lever (8) is shifted to the reverse speed (R), the rotary clutch lever moves the rotary clutch fork shaft (21) in the direction of clutch "on", that is, FIG. When the guide shaft (31) connected via the pin (32) slides in the same direction, the guide portion (8b) of the shift lever (8) slides in the same direction. The shift lever (8) can be moved from the position of the reverse speed (R) to the position of the neutral (N), and the reverse control can be reliably performed.

When the rotary tilling operation is performed by switching the handle (16) to the reverse position, the pin (32) is moved upward to stop at the predetermined position as described above, and the rotary clutch fork shaft (21) is moved. ) May be disengaged from the pin (32) to release the reverse restraint, and the handle (1) may be released.
When returning (6) from the reverse position to the original normal position, the pin (3)
2) is moved to the lower position and fitted to the rotary clutch fork shaft (21). In the present invention, unless the pin (32) is fitted to the rotary clutch fork shaft (21), FIG. As shown by, the pin (32) disturbs the handle (16) so that the handle (16) cannot be returned to its original position. In this case, it is impossible to release the reverse check device, so that the safety of the worker can be sufficiently ensured.

On the other hand, as means for moving the pin (32) upward and stopping at a predetermined position, for example, as shown in FIG. 3, a pin (32) is integrally provided with a grip portion (32a), It is made to protrude from the side of the handle base (20), and is configured to be vertically movable along an elongated hole (20b) formed in the side of the handle base (20). The stopper (33) attached to the side of the handle base (20) also prevents the pin (32) from falling. The illustrated stopper (33) has a rod (33b) configured to freely enter and exit the support cylinder (33a), and supports the pin (32) from below. The means for parking is not limited to those shown.

In addition, a pin (32) is always used by a spring or the like.
If the handle (16) is configured to be pressed upward and the pin (32) is prevented from projecting by the bottom of the handle support rod (15) when the handle is in the normal position, the handle (16) can be simply reversed. The pin (32) protrudes upward, and the engagement with the rotary clutch fork shaft (21) is automatically released,
The reverse restraint device can be released, but when the handle (16) is returned to its original position, the pin (32) must be retracted, and in any case, the pin (3) must be retracted.
It is preferable in terms of operation that 2) be provided with a grip portion (32a) or the like.

As described above, according to the present invention, the clutch pawl (23) sliding on the rotary output shaft (19) in conjunction with the sliding of the rotary clutch fork shaft (21) in the machine width direction is provided. Utilizes the fact that the transmission of rotational power to the rotary tilling claw (11) is controlled by meshing with or disengaging from the bevel gear (24) idled on the rotary output shaft (19). By interlocking the rotary clutch fork shaft (21) and the speed change lever (8) via a pin (32), which is a connecting member, it is ensured that the reverse drag is applied at the correct position of the steering wheel. The reverse restraint system is easily released from the reverse position of the steering wheel, and when the handlebar is returned from the reverse position to the normal position, the reverse braking device is not forgotten. .

That is, the engagement between the clutch pawl (23) on the rotary output shaft (19) and the bevel gear (24) results in the so-called rotary clutch "on", and the release of the engagement results in the rotary clutch "off". With the guide shaft (31) and the pin (32), not only the rotary clutch lever but also the shift lever (8) can be partially operated by operating the shift lever (8). When (8) is operated, the rotary tilling claw (11) is prevented from rotating, and when the shift lever (8) is shifted to the reverse speed (R), the rotary clutch lever is turned on. When operated, the speed change lever (8) is deviated from the reverse speed (R).

When the rotary tilling operation is performed with the handle in the reverse position, the pin (3
2) The reverse restraint device is easily released simply by moving the handle upward, and when returning the handle from the reverse position to the normal position, the pin (32) must be retracted so that it cannot be returned to the original position. The reverse restraint is always applied at the correct position of the steering wheel, that is, the reverse restraint device is not forgotten to be applied at the correct position of the handle. Needless to say, the present invention can be appropriately designed and modified within the spirit of the present invention.

[0022]

According to the present invention, the shaft that slides by shifting the speed change lever to the reverse speed and the shaft that turns the rotary tilling device "on" and "off" are interlocked via the connecting member. The reverse restraint device is configured so that the connecting member can be released only when the handle is in the reverse position, so the reverse restraint device cannot be released when the handle is in the normal position, and the reverse restraint in the normal handle position can be reliably performed. Can be effective. Further, if the connecting member is constituted by a pin and the pin is projected from the vicinity of the handle base and parked so that the reverse restraint device is released, the release of the reverse restraint device becomes easy, and the handle is removed. When returning from the reverse position to the normal position, it is necessary to retract the pin protruding from the vicinity of the handle base to return it to its original position. It will not be forgotten and the worker's safety can be sufficiently ensured.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a reverse check device according to the present invention.

FIG. 2 is a side view of a transmission case.

FIG. 3 is an explanatory view showing parking means.

FIG. 4 is a sectional view showing a structure of a transmission case.

FIG. 5 is a side view showing the entire management machine.

FIG. 6 is an explanatory view of a guide groove.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 engine 2 transmission case 3 traveling transmission section 4 rotary transmission section 5 power transmission case 6 traveling shaft 7 traveling wheel 8 speed change lever 9 rotary transmission case 10 claw shaft 11 tillage claw 12 rotary frame 13 rotary cover 14 tail wheel 15 handle support rod 16 Handle 17 Main transmission shaft 18 High / low speed switching gear 19 Rotary output shaft 20 Handle base 21 Rotary clutch fork shaft 22 Rotary fork shaft 23 Clutch pawl 24 Bevel gear 25 Rotary bevel gear 26 Rotary shaft 27 Hawk 28 High / low speed switching fork 29 Output gear 30 Guide Groove 31 Guide shaft 32 Pin 33 Stopper

Claims (3)

[Claims] 1. An engine is mounted in front of the fuselage, a rotary tilling device is mounted in the rear of the fuselage, a shift lever that is swingable about a shaft support is provided, and a handle is configured to be switchable between forward and reverse positions. In the control device, the shaft that slides by shifting the shift lever to the reverse speed and the shaft that turns the rotary tilling device “on” and “off” are configured to interlock with each other via a connecting member, and the handle is in the reverse position. The reverse check device in the management machine, wherein the connecting member can be released only at the time of (1). 2. The connector according to claim 1, wherein the connecting member is formed of a pin, and the pin is configured to protrude from the vicinity of the handle base only when the handle is at the reverse position.
A reverse check device in the management machine according to [1]. 3. The reverse control device according to claim 2, wherein parking means is provided for allowing a pin protruding from the vicinity of the handle base to be parked in a protruding state.