JPH052001Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a speed change operation device for a work machine for a management machine, specifically, it is used to change the speed of a work machine attached to a management machine between forward and reverse directions, and to raise the height of the work machine. The present invention relates to a speed change operation device used to perform speed change operations at multiple low speed stages.

(Prior Art) Conventionally, when changing the speed of a work machine connected to a management machine, a gear shift lever is provided on the body side of the management machine, and the shift lever is used to switch the work machine between forward and reverse directions. Furthermore, the working machine is operated to change speeds through multiple stages of high and low speeds.

(Problems to be Solved by the Invention) However, with the conventional speed change operation device as described above, when changing the speed of the working machine, it is not possible to perform the speed change operation from the hand side of the handle.
It is necessary for the worker to approach the work machine side and operate the speed change lever, which poses a safety problem for the worker.Moreover, when operating the speed change lever, malfunctions are likely to occur, and if something happens, the work machine There were cases where people made mistakes in the forward/reverse operation of the machine, which could lead to danger.

The present invention was devised in view of the above-mentioned problems, and its purpose is to change the speed of the working machine from the handle side using an operating wire, and to change the pulling direction of the operating wire. For example, when performing a forward/reverse operation of the work implement by selectively performing a speed change operation of the work implement, the forward/reverse operation is divided into a neutral position and a forward rotation position, and a neutral position and a reverse rotation position, To provide a speed change operation device for a work machine for a management machine, which can perform a safe speed change operation without causing malfunction by selectively performing each of these positions by changing the pulling direction of the operation wire. There is a particular thing.

(Means for Solving the Problems) As shown in the embodiment of the drawings, the present invention is a speed change operation device for a working machine attached to a management machine.
Operation wire 14 connected to clutch lever 13
and an outer tube 15 that guides the wire 14.
Outer receiver 16 that supports this outer cylinder 15
and a return spring 17 that biases the clutch lever 13 in a direction opposite to the direction in which the wire 14 is pulled, and returns the clutch lever 13 to the neutral position.
4, the clutch lever 13 is actuated to perform a gear change operation, and the outer receiver 16 is moved to one side and the other side in the direction of movement of the clutch lever 13 with respect to the neutral position of the clutch lever 13. It is characterized by providing a position changing mechanism for changing the position.

(Function) When the work machine is connected to the body of the management machine to perform various works, the outer receiver 16 is moved to either side with respect to the neutral position of the clutch lever 13 via the position change mechanism. By changing the position of the operating wire 14 to the side and changing the pulling direction of the operating wire 14, the speed change operation of the working machine is selectively performed. For example, when performing forward/reverse operation of the working machine, the outer As the position of the receiver 16 is changed, the pulling direction of the operating wire 14 is changed, so that the clutch lever 13 is
The forward/reverse operation of the working machine is divided into a neutral position and forward/reverse position, and a neutral position/reverse position, and the switching operation to each of these positions causes malfunction due to the pulling operation of the operating wire 14. It is done safely.

Further, since the operating wire 14 is used to change the speed of the working machine, the operating wire 14 is connected to a gear shift lever supported on the handle proximal side. By moving the clutch lever 13 forward and backward, the gear shift operation of the working machine can be performed safely.

(Example) The gear change operation device for a work machine for a management machine according to the present invention will be described below with reference to an example shown in the drawings.

The control machine shown in FIG. 4 has an engine 2 mounted on the front upper part of the machine body 1, a transmission case 3 on the rear side of the machine body 1, and running wheels 4 on both sides below the transmission case 3. While supporting
A control handle 5 is provided on the upper part of the mission case 3 and extends toward the rear and upper side of the aircraft body 1,
An operating lever 6 is attached to the hand side of the operating handle 5 for controlling the speed of the working machine, which will be described later.

Further, a working machine 8 is removably connected to the rear side of the machine body 1 via a hitch fitting 7.
In the illustrated embodiment, a rotary device 8 is connected as the actuator 8.

The rotary device 8 includes a support frame 9 coupled to the body 1 via the hitch fitting 7;
Rotary cover 9a attached to the support frame 9
, a transmission gearbox 10 integrally provided on the front upper side of the support frame 9, and a transmission case 11 extending downward from the gearbox 10;
It is composed of a plurality of rotary claws 12 provided on both sides of the lower part of the transmission case 11.

Therefore, the speed change operation device of the rotary device 8 as described above was constructed as follows.

That is, the speed change operation device includes a clutch lever 13 attached to a gear box 10 provided on the upper side of the support frame 9 so as to be freely advanced and retracted, and one longitudinal end connected to the clutch lever 13, and the other end connected to the clutch lever 13. An operating wire 14 connected to a speed change lever 6 provided on the proximal side of the operating handle 5, an outer tube 15 through which the operating wire 14 is inserted and guided, and an outer receiver 16 that supports one longitudinal end of the outer tube 15. A return spring 17 is provided which biases the clutch lever 13 in a direction opposite to the pulling direction of the operating wire 14 and always biases the clutch lever 13 toward the neutral position. By the traction operation, the clutch lever 13 is moved forward and backward with respect to the gearbox 10, and accordingly, the transmission mechanism built in the gearbox 10 is actuated to change the speed of the rotary device 8. A position changing mechanism 1 for changing the position of the clutch lever 16 from the neutral position of the clutch lever 13 to one side and the other side in the moving direction of the clutch lever 13.
8 was established.

Specifically, as shown in detail in FIGS. 1 and 2, a protrusion 10a that protrudes outward is integrally provided on the side wall of the gear box 10, and a protrusion 10a that extends in the longitudinal direction of the aircraft body is provided on the protrusion 10a. Outline U
A shaped actuation arm 19 is supported so as to be able to swing in the left-right direction of the fuselage via a pivot pin 20, and an axially outer end of the clutch lever 13 is connected to an intermediate portion of the actuation arm 19 via a connecting pin 21. while supporting the operating arm 19, a connecting rod 22 extending rearward is coupled to the rear end in the longitudinal direction of the operating arm 19,
A coupling body 23 coupled to the tip of the operating wire 14 is swingably coupled to the coupling rod 22 .

Further, the combined body 23 and the outer receiver 16
The return spring 17 is interposed between the
The return spring 17 causes the clutch lever 13 to
is constantly biased in a direction opposite to the pulling direction by the operating wire 14, and as the pulling of the operating wire 14 is released, the clutch lever 13 is moved back to the intermediate position.

Further, the position changing mechanism 18 of the clutch lever 13 includes a support rod 24 that is fixedly supported upwardly on the support frame 9 of the rotary device 8 or the rotary cover 9a, and a support rod 24 that is mounted on the upper part of the support rod 24 in the left-right direction of the machine. a support arm 25 fixed integrally toward
First and second cylindrical bodies 26 and 27 are integrally fixed vertically on both sides of the support arm 25 in symmetrical positions about the neutral position of the clutch lever 13, respectively. and a support body 28 of the outer receiver 16 which can be selectively inserted and fixed into each of the cylinders 26 and 27, and the shaft portion 16a of the outer receiver 16 is inserted through the upper side of the support body 28, By screwing screw bodies 29, 29 onto the shaft portion 16a so as to sandwich both upper side surfaces of the support body 28, the outer receiver 16 is integrally supported by the support body 28, and this The support body 28 is connected to each of the cylindrical bodies 26 and 2.
7, the outer receiver 16 is repositioned in the left-right direction of the machine with respect to the neutral position of the clutch lever 13, and the pulling direction of the operating wire 14 by the control lever 6 is changed in the left-right direction of the machine. This is done as if to change it.

Further, inside the gear box 10, a first
As shown in the figure, a shifter 31 is provided on the drive shaft 30 to support a drive shaft 30 to which rotational power is transmitted from the PTO shaft on the body 1 side, and to move in the axial direction in conjunction with the clutch lever 13. , first and second clutch pawls 31a and 31b are provided on both sides of the shifter 31, respectively, and first and second clutch pawls 31a and 31b are provided on both sides of the drive shaft 30 opposite to the shifter 31, and engage with the respective clutch pawls 31a and 31b, respectively. A forward rotation side gear 32 and a reverse rotation side gear 33 having claw bodies 32a and 33a are fixed, and an intermediate shaft 34 is supported inside the gear box 10 in parallel with the drive shaft 30. The first gear is interlocked with the idler gear 35b, which is provided with an idler shaft 35a on the shaft 34 and on the forward and reverse side gears 32.
A transmission gear 35 and a second transmission gear 36 that are always meshed with the reverse gear 33 are provided, and a transmission gear 35 and a second transmission gear 36 are provided. The forward and reverse rotational forces are selectively transmitted to the rotary pawl 12.

Next, the operation of the shift operating device configured as above will be explained.

First, as shown by the solid lines in FIGS. 1 and 2, the support body 28 of the outer receiver 16 is inserted and fixed into the first cylindrical body 26 provided on the right side of the body with respect to the neutral position of the clutch lever 13. Sometimes, the operation wire 14 is controlled by the operation lever 6.
The clutch lever 13 is selectively switched between the normal rotation position and the neutral position by the traction operation and the backward movement operation of the operation wire 14 by the return spring 17.

That is, as described above, the support body 28 is
When fixing to the cylinder body 26, the operation lever 6
Due to the pulling operation of the operating wire 14, the combined body 23 coupled to the tip of the operating wire 14
The clutch lever 13 is advanced to the inside of the gearbox 10 via the connecting rod 22 and the operating arm 19, and as the clutch lever 13 is advanced, the shifter 31 installed in the gearbox 10 is moved to the neutral position. The first clutch pawl 31a provided on the shifter 31 is moved to the right in FIG.
The rotational power of the drive shaft 30 is transmitted from the normal rotation side gear 32 to the idler gear 35b and the first
It is transmitted to the rotary pawl 12 via the transmission gear 35 as normal rotation power.

Further, when the operating lever 6 is released to release the traction force of the operating wire 14, the clutch lever 13 is returned to the neutral position by the return spring 17, and the first clutch lever 13 of the shifter 31 is moved back to the neutral position.
The clutch pawl 31a is the pawl body 3 of the normal rotation side gear 32.
2a, and power transmission to the rotary claw 12a is stopped.

Next, as shown by the imaginary lines in FIG. , the pulling direction of the operating wire 14 is opposite to the above-described case, and the pulling operation of the operating wire 14 by the operating lever 6 and the return operation of the operating wire 14 by the return spring 17, The clutch lever 13 is selectively switched between a reverse rotation position and a neutral position.

That is, as described above, the support body 28 is
When fixing to the cylinder body 27, the operation lever 6
As a result of the pulling operation of the operating wire 14, the clutch lever 13 is pulled out to the outside of the gearbox 10, and as the clutch lever 13 is pulled out, the shifter 31 installed in the gearbox 10 is moved to the neutral position. The second clutch pawl 31b provided on the shifter 31 is moved to the left in FIG.
a, and the rotational power of the drive shaft 30 is transmitted to the rotary pawl 12 as reverse power via the reverse rotation side gear 33 and the second transmission gear 36.

Further, when the operating lever 6 is released to release the pulling force of the operating wire 14, the clutch lever 13 is returned to the neutral position by the return spring 17, and the second clutch lever 13 of the shifter 31 is moved back to the neutral position.
The clutch pawl 31b is the pawl body 3 of the reverse gear 33.
3a, and power transmission to the rotary claw 12 is stopped.

In the above embodiment, the position changing mechanism 18 includes two first and second cylindrical bodies 26 and 27, and a support 28 for the outer receiver 16 that can be selectively replaced with each of the cylindrical bodies 26 and 27. The cylindrical bodies 26 and 27 are arranged at both left and right positions centering on the neutral position of the clutch lever 13, and the support 28 of the outer receiver 16 is positioned relative to the cylindrical bodies 26 and 27. By selectively changing the pulling direction of the operating wire 14, the gear shifting operation by the clutch lever 13 is selectively changed between a neutral position and a forward rotation position, and between a neutral position and a reverse rotation position. However, the position changing mechanism 18 can also be configured as shown in FIG. 3, for example.

That is, a support cylinder 37 is provided on the support frame 9 of the rotary device 8 at the neutral position of the clutch lever 13, and extends upward.
A support shaft 38 is rotatably supported on the support shaft 38. A support 39 is integrally provided on the upper side of the support shaft 38, extending in the horizontal direction. A protruding rod 40 is attached to the tip of the support 39, and the outer receiver 16 is attached to the protruding rod 40.
1 and 41 may be connected thereto.

When doing this, the support shaft 38 is rotated about the support tube 37, and the outer receiver 16 coupled to the protrusion 40 is repositioned in the left-right direction with respect to the neutral position of the clutch lever 13. As the pulling direction of the operating wire 14 is changed, the gear shifting operation by the clutch lever 13 is selectively changed between the neutral position and the normal rotation position, and between the neutral position and the reverse rotation position, as in the case described above. be.

Furthermore, in the embodiment described above, a case has been described in which forward and reverse rotational power is selectively transmitted to the rotary pawl 12, but the present invention can also be applied to a case where the rotary pawl 12 is changed over multiple stages of high and low speeds. For example, by providing high and low speed change gears in the gear box 10 and selecting each of the change gears with the shifter 31, the rotational power that has been changed into two high and low speeds can be selected for the rotary pawl 12. It is also possible to communicate the information in a transparent manner.

Further, as shown in FIG. 4, the drive shaft 30 installed in the gearbox 10 is connected to a sub-transmission case 42 from the PTO shaft provided on the body 1 side.
At this time, by replacing the transmission gear installed in the auxiliary transmission case 42 with one of any diameter, the rotational power reaching the rotary pawl 12 can be transmitted to any number of gears. It can be changed.

(Effect of the invention) As explained above, in the gear shift operation device of the present invention, the operation wire 1 connected to the clutch lever 13
4, and an outer tube 1 for guiding the operating wire 14.
5, an outer receiver 16 that supports the outer cylinder 15, and a return spring 17 that biases the clutch lever 13 in a direction opposite to the pulling direction of the operating wire 14 to return it to the neutral position. As the operating wire 14 is pulled, the clutch lever 13 is actuated to perform a speed change operation on the working machine, and the outer receiver 16 is moved in one direction in the movement direction of the clutch lever 13 from the neutral position of the clutch lever 13. Since the position changing mechanism mechanism 18 for changing the position between one side and the other side is provided, for example, when performing a forward/reverse operation of the working machine, the outer receiver 16 can be changed in position to change the direction in which the operating wire 14 is pulled. By changing the forward/reverse operation of the work machine by the clutch lever 13, it becomes possible to separate the forward/reverse operation of the work machine into a neutral position and forward rotation position, and a neutral position and reverse rotation position, and therefore, switching to each of the above positions is possible. The operation can be performed safely without causing malfunction by pulling the operating wire 14, and moreover, the pulling operation of the operating wire 14 can be performed with the gear shift lever supported on the handle proximal side. This made it possible to safely shift gears on work equipment.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the main parts of the gear shift operating device according to the present invention, FIG. 2 is a partially cutaway rear view of the main parts,
Figure 3 is a partially cutaway rear view showing another embodiment;
The figure is a side view showing the overall structure of the management machine. 8... Work equipment, 13... Clutch lever, 14
...Operation wire, 15... Outer tube, 16...
Outer receiver, 17...Return spring, 18...
Repositioning mechanism.

Claims (1)

[Scope of utility model registration request] A speed change operation device for a work machine attached to a management machine, which includes an operation wire 14 connected to a clutch lever 13 and an outer cylinder 15 that guides the wire 14.
, an outer receiver 16 that supports the outer cylinder 15, and a return spring 17 that biases the clutch lever 13 in a direction opposite to the pulling direction of the operating wire 14 and returns it to a neutral position, 14, the clutch lever 13
is actuated to perform a gear change operation, and the outer receiver 16 is moved to the clutch lever 13.
A speed change operating device for a work machine for a management machine, characterized in that a position changing mechanism is provided for changing the position of the clutch lever 13 from a neutral position to one side and the other side in the moving direction.