JPH04110235A - Main clutch operating structure of walking type controller - Google Patents

Abstract

PURPOSE:To improve the safety by installing the second operation passage having a means which can not self-retain at a clutch ON position and urges an operating lever toward a clutch OFF position and permitting a clutch to be immediately cut off when the operating lever is released. CONSTITUTION:The first operating passage 18 having the first means S1 for self- retaining the operating lever 11 for a clutch between a clutch ON position and a clutch OFF position and the second operation passage 19 having the second means S2 which can not self-retain at the clutch ON position and urges the operating lever 11 toward the clutch OFF position are installed, and the clutch OFF positions of both the passages 18 and 19 are allowed to communicate through a connection passage 20. A tongue piece 22 which is shifted by the shift operation of a selecting mechanism is arranged at an operation passage W position, and the operating lever 11 is urged in the state leading from the second operation passage 19 to the first operation passage 18, and an advance/retreat selecting mechanism 6 and the tongue piece 22 are interlocked so that the tongue piece 22 crosses the connection passage 20, accompanied with the advance selecting operation of the selecting mechanism 6, and the tongue piece 22 crosses the first operation passage 18, accompanied with the retreat selecting operation of the selecting mechanism 6.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a main clutch operation structure for a walking management machine.

[Conventional technology]

Conventionally, the main clutch on/off operation in a walking management machine has been performed by moving the clutch lever along an operation path in which the clutch engagement position and the clutch disengagement position are provided beyond a dead point, as shown in, for example, Japanese Patent Application Laid-Open No. 1-145231. −
It is constructed so that it can be oscillated, and can self-maintain in either the engaged position or the cut position.

[Invention or problem to be solved]

Walking-type management machines are designed to be able to switch between forward and reverse motion for switchback turns at the edge of a ridge or when working with multi-work equipment connected, and a switching lever is installed in the control section. Or is provided.

When going backwards, does it move towards the tiller or the operator? In this case, if the operator or the operator were to fall for some reason, there is a risk that the aircraft would collide with the person who fell, and in that state Since the only way to stop the aircraft is to turn the clutch lever located on the handle, there is room for improvement in the main clutch operation structure of the walking control aircraft from the safety point of view in such cases. there were.

An object of the present invention is to realize a main clutch operation structure for a walking management machine that eliminates the above-mentioned concerns.

[Means to solve the problem]

To this end, the present invention provides a first operating path in which a first means for self-holding the clutch operating lever is provided at each of the clutch-engaged position and the clutch-disengaged position; The walking type is provided with an operation path consisting of a second operation path provided with a second means for urging the operation lever toward the clutch disengagement position, and a connection path that communicates the clutch disengagement positions in both of these paths. It is characterized in that it constitutes the main clutch operation structure of the management machine.

Further, in the above structure, a tongue piece that moves with the switching operation of the forward/reverse switching mechanism is disposed in the operating path portion, and the operating lever is biased from the second operating path toward the first operating path, The forward/backward switching mechanism and the tongue piece are linked in such a manner that the tongue piece crosses the connection path when the switching mechanism is switched forward, and the tongue piece crosses the first operating path when the switching mechanism moves backward. In addition, it becomes a more convenient main clutch operation structure for a walking management machine.

[For production]

According to the structure of claim 1, the first operating path holds the operating lever in both the ENTER and OFF positions as before, and the second operating path holds the operating lever in the ENTER position (but does not hold the operating lever in the ENTER position). The operator must continue to hold the control lever, and the clutch is immediately disengaged when the control lever is released.

Therefore, by operating the main clutch when moving forward on the first operating path and operating the main clutch when reversing using the second operating path, it is possible to move forward with the clutch lever released, and the driver can If the clutch lever is released due to a fall, etc., the movement of the aircraft will immediately stop, thereby preventing the aircraft from coming towards the pilot against his will.

Further, according to the structure of claim 2, due to the linkage between the forward/reverse switching mechanism and the tongue piece, the clutch lever can be operated only in the first operating path when moving forward, and the clutch lever can be operated only in the second operating path when moving backward. Since it is possible to operate
When the clutch lever is released when going backwards, the action of moving the aircraft forward or immediately stopping it can be ensured. Furthermore, the inconvenience of the aircraft stopping when the clutch lever is released when moving forward is eliminated.

〔Effect of the invention〕

As a result, the main clutch operation structure according to claim 1 provides a convenient latch operation suitable for a forward state and a safe latch operation suitable for a reverse state where the aircraft can be stopped immediately in the event of an abnormality such as a fall of the pilot. The practical advantages obtained are enormous.

The main clutch operation structure according to the second aspect of the present invention can be made to have excellent reliability so that the above-mentioned effects can be surely expected.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

As shown in Fig. 6, a frame member (2) carrying an engine (E) is attached to a transmission case (M) with wheels (1) pivoted at the bottom, and an oil tank is mounted above the engine (E). (3) and further connects the work device (A) to the mission case (M) to form a walking management machine.

An angle-adjustable control handle (5) is attached to the top of the mission case (M) via a cradle (4), and a main transmission with two forward speeds and one reverse speed is installed from the top of the mission case (M). (not shown) as a forward/reverse switching mechanism, and a auxiliary transmission with two high and low gears (not shown) housed in the rotary case (7) of the working device (A). A sub-shift lever (8) to be operated is installed and extends toward the rear side. Also, a belt interlocking mechanism (9) that spans the engine (E) and the transmission case (M).
The tension clutch type main clutch (10
) are provided.

As shown in FIGS. 1 to 3, the main clutch (10) is supported by an operating frame (12) fixed to the handle rod (5a). body (12)
It is configured to be operable along a substantially U-shaped operation path (W) formed on the top surface.

The clutch lever (11) is swingable back and forth around a horizontal axis (P), and is swingable left and right around a front and back axis (X) provided on the lever bracket (13). By connecting the operating arm (15) fixed to the main clutch wire (I6) and the tension-energized main clutch wire (I6) via the string gear (17), there is a dead point (D, P) in the front and rear direction. There is.

The operation path (W) includes a first operation path (18) with a clutch engagement position (ON, ) on the front side of the dead point (D, P) and a clutch disengagement position (OFF, ) on the rear side, and a dead point ( Clutch engagement position (D, P) slightly behind
ON2) and a clutch disengaged position (OFF2) which is rearward of this clutch engaged position (ON2).
Operation route (19), and both these routes (18), (
and a connection path (20) that communicates the clutch disengaged positions in (19) with each other. The clutch lever (11) is biased toward the first operation path (I8) by a coiled spring (21) and is normally located in the recessed portion (20a) of the connection path (20).

In addition, a tongue piece (22) that can swing freely around the vertical axis (Y) is provided between the first and second operation paths (18) and (19), and a forward and backward movement regulating wire is attached to this tongue piece (22). (23) Pivotally connect the L-shaped rod (24) at the tip, and connect the regulating wire (
23) Connect the other end to the wood part (6a) of the main gear shift lever (6).
It is linked to.

The main shift lever (6) is pushed and pulled to shift the shift path (
25), (26), and is configured to shift by rotation, and as shown in Fig. 5, there are two forward stages (F,).
, (F2), select reverse (R) and neutral (N).

Forward 1st speed (F1) and 2nd speed (F2) are on the neutral operating path (27
), and reverse (R) is spaced apart in the direction of forward speed (
F1) is provided on the opposite side.

As shown in Figures 3 and 4, an operating piece (28) of the regulation wire (23) is attached to the rod portion (6a) of the main gear shift lever (6), and the operating piece (28) is connected to the main gear shift lever. (6
) with a long hole (28a) formed along the rotation locus of the
28b) and a bolt portion (28c) fixed thereto.

The connecting portion (23a) at the base end of the regulation wire (23) is fitted onto a pin (31) fixed to a support plate (30) that is swingable around a support shaft (29) along the wood portion (6a). The support plate (30) is urged inward (to the right side in Fig. 3) by a coiled spring (32), and a stopper (not shown) is located at the position shown in Fig. 3. maintained by.

Then, by pulling the main shift lever (6) rearward, the gear shift lever (6) is shifted to the rear shift path (26), and by pushing the main shift lever (6) forward, it is shifted to the front shift path (25).
Moreover, only at this time, the pin (31) and the elongated hole (28a) of the support plate (30) are engaged (FIG. 4).

When the main gear shift lever (6) is operated to the reverse (R) position, the restriction wire (23) is pulled and the tongue piece (22) is pulled.
) crosses the first operation path (18) (imaginary line in Figure 1), and the clutch lever (11) crosses the first operation path (18).
When the main gear shift lever (6) is moved to the first forward speed (F1) position, the elongated hole (2
8a), the control wire (23) is pulled by the return spring (33), and the pin (31) is engaged in the position shown in FIG. The tongue piece (22) is connected to the connection path (2
0) (solid line in FIG. 1), and the second operating path (19)-\ of the clutch lever (11) is now disabled. Note that (34) and (34) are stoppers that determine the swinging position of the tongue piece (22). or,
When the main gear shift lever (11) is operated to the forward second speed (F2) position, the elongated hole (28a) and the pin (31) are disengaged, and the tongue piece (22) follows the connection path (20). The state of crossing is maintained.

In other words, in the forward state, the clutch lever (11) is in the first position.
In the operation path (18), the clutch lever (1) is
1) functions as a check mechanism that allows each clutch to be operated only in the second operation path (19), and the main clutch lever (1)
6), a spring (not shown) that pulls the
From the operation path (W) etc., the first means, the second means (S1),
(S2) is constructed.

It should be noted that the present invention is not limited to the structure shown in the accompanying drawings by adding reference numerals in the claims for convenient comparison with the drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the main clutch operation structure of a walking management machine according to the present invention, FIG. 1 is a plan view of the operation section in this structure, FIG. 2 is a sectional view of the operation section in this structure, and FIG. 3 is an overall configuration diagram of the structure, Figure 4 is a partially cutaway rear view showing the clutch operation structure on the transmission case side, Figure 5 is a plan view showing the operating path of the main gear shift lever, and Figure 6 is a walking type management. FIG. (6)... Forward/forward switching mechanism, (11)...
...Clutch operation lever, (18)...First operation route, (19)...Second operation route, (20)...
... Connection route, (22) ... Tongue piece, (S1) ...
...First means, (S2) ...Second means, (
W)......Operation route.

Claims (1)

[Claims] 1. A first operating path (18) provided with a first means (S_1) for self-holding the clutch operating lever (11) at each of a clutch engaged position and a clutch disengaged position. ,
a second operating path (19) that is unable to self-hold in the clutch engaged position and is provided with a second means (S_2) for biasing the operating lever (11) toward the clutch disengaged position; and both of these paths. A main clutch operation structure for a walking management machine including an operation path (W) consisting of a connection path (20) that communicates the clutch disengaged positions in (18) and (19). 2. A tongue piece (22) that moves with the switching operation of the forward/reverse switching mechanism (6) is disposed in the operating path (W), and the operating lever (11) is moved along the second operating path (1).
9) toward the first operation path (18), and as the switching mechanism (6) moves forward, the tongue piece (22) crosses the connection path (20) and the switching mechanism (6) moves forward. The forward/reverse switching mechanism (6) and the tongue piece (22) are linked to each other so that the tongue piece (22) crosses the first operation path (18) as the mechanism (6) moves backward. A main clutch operation structure for a walking management machine according to claim 1.