JP3313581B2 - Stand device for walking type work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stand device for self-standing a walking-type work machine such as a walking-type cultivator. More specifically, a stand is mounted on a front frame so as to be freely switchable between a stand position and a storage position. When the stand is located between the stand and the spring receiver formed on the front frame, and the stand is located on the stand posture side of the intermediate posture between the stand posture and the storage posture, the stand is urged to swing to the stand posture. Also, the present invention relates to a device provided with a posture switching stabilizing spring that urges the stand to swing to the retracted position when the retracted position is located closer to the retracted position than the intermediate position.

[0002]

2. Description of the Related Art In a stand apparatus of the walking type working machine,
The kick operation of the foot kick operation unit of the stand switches the stand between the stand posture and the storage posture. That is, it is a stand device of a kicking operation specification.

[0003] By the way, a user request for the stand device of the walking type working machine is required to operate the operating device provided on the control unit manually, in addition to the above-mentioned stand device of the kicking operation specification. There is also a stand device of a manual operation type that switches between a posture and a storage posture.

Conventionally, a stand device of a kicking operation specification and a stand device of a manual operation specification are prepared, respectively.
The above user request was met.

[0005] Conventionally, because of different specifications, a stand for a stand device of a kicking type and a stand for a stand device of a manual operation type have been separately manufactured.

[0006]

Therefore, according to the above-mentioned prior art, when a stand device of two specifications is obtained, the cost is high.

An object of the present invention is to make it possible to obtain a stand device for a kicking operation and a stand device for a manual operation at low cost.

[0008]

The features, functions and effects of the first aspect of the present invention are as follows.

[Features] A stand provided with a kicking operation section on the front frame is mounted so as to be switchable between a stand posture and a storage posture, and the stand is positioned between the stand and the spring receiver formed on the front frame. When the stand is located closer to the stand posture than the intermediate posture between the retracted posture and the stand posture, the stand is swung to the stand posture, and when the stand is located closer to the retracted posture than the intermediate posture, the stand is retracted. A stand device for a walk-behind working machine provided with a posture switching stabilizing spring that oscillates to a posture, wherein the stand has an operation tool that switches the posture with an operation tool provided in a control unit. Forming a connecting portion of a linking tool for linking to
The spring is configured to be detachable from the spring receiver,
Forming a second spring receiver on the arm, and
To the storage position
The stand is configured to swing and bias to the stand position.
There is a point.

[Operation] According to the first aspect of the present invention, an operating tool is provided on the control unit, and an interlocking tool is connected to a connecting unit formed on the stand. Since the posture can be switched, the stand provided with the kick operation section for the stand device of the kick operation specification can be used as the stand for the stand device of the manual operation specification.
In addition, the spring is changed from the spring receiver to the second spring receiver.
This will urge the stand to swing to the stand position.
The spring will turn the stand into the stand position.
The switch acts as a switch for
In the case of a stand-alone device, the switch is operated via an operating tool provided on the control unit.
Pull or push the stand against the urging force of the spring.
The stand can be switched to the retracted position.
Operating and pushing or pulling the operating tool
Switches the stand to the retracted position by the force of the spring
Can be.

[Effect] Therefore, according to the first aspect of the present invention, the stand can be shared between the stand device of the kicking operation specification and the stand device of the manual operation specification, and the cost can be reduced. Was. Moreover, if you want to use a stand device with manual operation specifications
If the spring is used as a spring for operation to the stand posture,
The stand can be moved in one direction, such as pulling or pushing.
The operating posture can be switched to the storage position,
The means for linking with the
The cost can be reduced by sharing the spring.
You.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a walking type cultivator, which is an example of a walking type working machine, has a front frame 3 connected to a transmission case 2 provided with an axle 1 at a lower portion.
A steering handle 4 extending rearward is continuously provided, an engine 5 is mounted on the front frame 3, a tilling rotary device 6 is mounted on each of the left and right ends of the axle 1, and a belt transmission from the engine 5 to the transmission case 2 is provided. 7 and a stand device. The steering handle 4 can be switched between front and rear directions by rotating around a vertical axis P.

As shown in FIGS. 3 and 5, the front frame 3 is composed of a pair of left and right plate-shaped frame members 3A bent in an inverted L-shape, and a hitch 8 is fixed to the front part.

The stand device is of a kicking operation specification, and as shown in FIGS. 2 and 3, is grounded by swinging around a horizontal axis Z and is connected to the tillage rotary device 6. A stand 8 is attached to the front frame 3 so as to be freely switchable between a stand posture for supporting the body and a stowed posture which is stored in the front frame 3 after the ground contact is released, and the foot operation section 8a is penetrated to the stand 8 from side to side. When the stand 8 is positioned between the stand 8 and the spring receiver 9 formed on the front frame 3, the stand 8 is positioned closer to the stand posture than the intermediate posture between the stand posture and the storage posture. 8 is urged to swing to the stand posture, and is positioned closer to the storage posture than the intermediate posture.
Spring 1 for posture switching stabilization for oscillating urging to the retracted posture
0 is provided.

The penetrating end of the kicking operation section 8a forms a spring receiver 11 on the stand 8 side.

The spring receiver 9 on the front frame 3 side is composed of a pin fixed to the front frame 3 and has a spring 10.
Is detachable from the spring receiver 9.

The manual operation tool 12 is linked to the stand 8 by a manual operation tool 12 which is an example of an operation tool to be attached to the operation handle 4 so that the posture of the stand 8 is switched to the foot kick operation section 8a of the stand 8. A connecting portion 14 of the interlocking tool 13 for causing the connection is formed.

In the front frame 3, when the stand 8 is in the retracted position, a second spring receiver is located below a straight line connecting the spring receiver 11 on the stand 8 and the left-right axis Z. 15 to form the spring 10
Is exchanged from the spring receiver 9 to the second spring receiver 15, so that the stand 8 in the storage position is urged to swing to the stand position.

As shown in FIGS. 6 and 7, the manual operation tool 12 is slidable in a straight line. The interlocking tool 13 slides the stand 8 by moving the manual operation tool 12 backward. One end is connected to the manual operation tool 12 via the rod 16 so as to swing and switch from the attitude to the storage attitude, and as shown in FIGS. The wires are connected via

Therefore, as shown in FIGS. 4 to 6, the stand device is provided with a manual operation tool 12, replaces the spring 10 with the second spring receiver 15, and interlocks the manual operation tool 12 and the stand 8 with the wire 13. As a result, the stand 8 is switched from the stand position to the retracted position against the urging force of the spring 10 by sliding the manual operation device 12 backward, and the stand 8 is moved by the front operation slide of the manual operation device 12 to the spring position. It is configured to be able to be changed to a manual operation specification for switching from the storage posture to the stand posture with the urging force of 10.

The second spring receiver 15 comprises a hole 15a formed in the front frame 3 and a spring receiving pin 15b inserted through the hole 15a so as to prevent the spring receiving pin 15b from coming off. β-shaped retaining pin 18
Into the spring receiving pin 15b and hold
8 is a means for preventing the front frame 3 from coming off by contact with the front frame 3.

As shown in FIGS. 6 and 7, the means for slidably attaching the manual operation tool 12 to the steering handle 4 includes a stay 19 having a cylindrical portion 19a for holding the manual operation tool 12 so as to rotate and slide freely. Is attached to the steering handle 4 with bolts and nuts.

The means for fixing the stand 8 in the retracted position against the urging force of the spring 10 in the manual operation specification is such that the rod 16 is bent into an L shape and one piece is manually operated as shown in FIGS. Through the tool 12, and into the cylindrical portion 19a,
An end 16a of the rod 16 protruding from the manual operation tool 12 is inserted therethrough to form a slide guide groove 20 for guiding the slide of the manual operation tool 12 between the storage operation position and the stand operation position. Slide guide groove 2
The rear end of the manual operation tool 12 communicates with the rear end of the manual operation tool 12 and then slides forward to allow the end 16a to enter and engage with the end 16a in the sliding direction and the rotation direction to perform manual operation. An L-shaped lock groove 21 for preventing the tool 12 from sliding forward and rotating is formed, and the end 1 is formed.
The manual operation tool 12 is configured to be held at the storage operation position against the urging force of the spring 10 by engaging 6 a with the lock groove 21. In addition, in the said cylindrical part 19a,
The manual operation tool 1 communicates with the front end of the slide guide groove 20.
2 with the end 16a inserted into the slide guide groove 20.
Is formed.

As shown in FIGS. 4 and 5, the means for connecting the connecting member 17 to the connecting portion 14 forms a connecting portion 14, that is, an annular portion through which the foot kick operating portion 8a is inserted. Then, pin holes 24 are formed on both sides of the connecting portion 14,
In a state where the connecting tool 17 is inserted to the connecting portion 14, the β-shaped positioning pin 23 is inserted and held in each of the pin holes 24, and the connecting tool 17 is brought into contact with the connecting tool 17 by the positioning pin 23 contacting the connecting tool 17. 14 is a means for positioning and fixing the kick operation section 8a in the longitudinal direction. Note that the kicking operation section 8a is in the shape of a round bar, and the connecting tool 17 is rotatable around the connecting section 14 when connected to the connecting section 14.

Further, the front frame 3 is formed with a bolt hole 27 for fastening a wire receiving member 25 for receiving the wire 13 provided when the stand device is of a manual operation specification, with a bolt / nut 26.

Therefore, according to this configuration, FIGS.
As shown in FIG. 4, the spring 10 is hung on the spring receiver 11 to provide a walking type cultivator having a stand device of a kicking operation specification. As shown in FIGS.
The spring 10 is engaged with the spring receiving pin 15b inserted in the hole 15a formed in the hole 15a in a retaining state, the manual operating tool 12 is attached, and the manual operating tool 12 and the stand 8 are linked via the wire 13. By connecting the stand 8 to the spring 10 by the pulling operation of the manual operation tool 12.
Is switched to the retracted position against the urging force of
The cultivator becomes a walking type cultivator having a manually operated stand device that switches the stand 8 to the stand posture by the biasing force of the spring 10 by loosening the spring. , The stand 8 and the spring 10 are shared.

In the transmission case 2, there are provided a sub-transmission for switching the traveling speed between high and low, a forward / reverse switching device for switching between forward and reverse, and a main transmission for switching the forward traveling speed between high and low. A transmission is provided,
By associating these with one shift lever 30 and operating the same, six forward speeds and two reverse speeds are performed. As shown in FIG. 9, the shift lever 30 is provided on a lever support portion 31 which is attached to be able to swing around a left-right axis X so as to swing left and right around an axis Y orthogonal to the left-right axis X. Installed. The shift operation associated with the operation of the shift lever 30 will be described in the following (1) to (1).
It is as (5). (1) The gear 3 is operated by moving the shift lever 30 to the low-speed side L across the neutral position N around the left-right axis X.
By rotating the sub-transmission shift shaft 34 of the sub-transmission to the low-speed state via the gears 2 and 33 and operating the high-speed side H,
The sub-transmission shift shaft 34 is rotated in a speed increasing state. (2) By swinging the shift lever 30 from the neutral position N to the low-speed side L by one step, the first operating portion 35 attached to the operating arm 30A linked to the shift lever 30 is moved to the forward shift shaft 36 of the main transmission. Engage with the mounted normal rotation operated part 37,
In this state, the shift lever 30 is swung in one direction to the left and right, and the operation arm 30A is swung in one direction to the left and right.
By shifting the main transmission shift shaft 36 to the low speed position to reveal the second forward speed F2 and swinging in the opposite directions to the left and right,
The main transmission shift shaft 36 is shifted to a high-speed position so as to exhibit a third forward speed F3. (3) By rotating the shift lever 30 from the neutral position N to the low-speed side L by two steps, the second operating portion 38 attached to the shift lever 30 is mounted on the forward / reverse shift shaft 39 of the forward / reverse switching device. The forward / reverse shift shaft 39 is shifted to the forward position by engaging the operated portion 40 and swinging the shift lever 30 in the left and right direction in this state to swing the operation arm 30A in the left and right direction. By displaying the first forward speed F1 and swinging in the left and right opposite directions, the forward / reverse shift shaft 39 is shifted to the reverse position and the first reverse speed R1 is developed. (4) The second operating portion 38 is engaged with the forward / reverse operated portion 40 by swinging the shift lever 30 from the neutral position N to the high-speed side H by one step. By swinging the operating arm 30A in one direction to the left and right, the forward / reverse shift shaft 39 is shifted to the forward position, and the fourth forward speed F4 appears. The reverse shift shaft 39 is shifted to the reverse position to produce the second reverse speed R2. (5) The first operating portion 35 is engaged with the forward operated portion 37 by swinging the shift lever 30 from the neutral position N to the high-speed side H in two steps. By swinging the operating arm 30A in one direction to the left and right by swinging in the left and right directions, the main transmission shift shaft 36 is shifted to the low speed position to reveal the fifth forward speed position F5, and is swung in the opposite direction to the left and right. The main transmission shift shaft 36 is shifted to the high-speed position so as to exhibit the sixth forward speed F6.

The operation arm 30A is shown in FIGS.
As shown in FIG. 7, the cylinder 30B is linked to the shift lever 30 so as to be swingable up and down around the axis W in the left-right direction, and can be mounted on the normal rotation operated part 37 and the normal / reverse operated part 40. The vertical swinging posture is regulated by, and is urged downward by a spring 30a so as to be always placed and held on the normally operated portion 37 and the forward and reverse operated portion 40.

Then, the operation arm 30A has the structure shown in FIG.
As shown in FIG. 1, the speed change guide plate 4 located thereabove.
A shift indicator 43 which is inserted into the shift guide groove 42 formed at 1 and indicates a shift state by a position with respect to the shift guide plate 41 is provided. Note that the speed change guide plate 41
Is provided with a speed change display portion 44 for displaying the name of each speed change portion of the speed change guide groove 42.
Are arranged in a horizontal position so that they can be viewed from the front and the rear.

As shown in FIG. 12, the rotary tilling rotary device 6 includes an inner claw shaft 51 on which cultivating claws 50 are mounted in a row in the circumferential direction, and an outer claw 51 in which the cultivating claws 50 are dispersedly arranged in the circumferential direction and the axial center direction. The inner claw shaft 51 is attached to the axle 1 in a state in which the outer claw shaft 51 is prevented from rotating and the shaft center position is regulated. The outer claw shaft 52 is rotatably attached to the inner claw shaft 51. I have. A one-way clutch 53 between the inner pawl shaft 51 and the outer pawl shaft 52 transmits the forward rotational driving force of the inner pawl shaft 51 to the outer pawl shaft 52, but does not transmit the reverse rotational driving force of the inner pawl shaft 51. Is interposed.
Therefore, during forward running, the outer claw shaft 52 is
When the vehicle is moving backward, only the inner claw shaft 51 is driven and rotated, and the outer claw shaft 52 simply rotates following the backward running. As described above, only the inner pawl shaft 51 is driven and rotated during the reverse movement, so that the reaction force for lifting the handle is reduced.

[Alternative Embodiment] In the above embodiment, a wire is shown as the interlocking device 13, but the interlocking device 13 may be a rod.

[Brief description of the drawings]

FIG. 1 is a side view of a walking type cultivator.

FIG. 2 is a side view of a stand device with a kicking operation specification.

FIG. 3 is a vertical front view of a stand device with a kicking operation specification.

FIG. 4 is a side view of a stand device of a manual operation specification.

FIG. 5 is a longitudinal sectional front view of a stand device of a manual operation specification.

FIG. 6 is a cutaway side view showing a mounting portion of the operation tool.

FIG. 7 is a longitudinal sectional view showing a mounting portion of the operation tool.

FIG. 8 is an expanded view of a stay.

FIG. 9 is a cutaway side view of the speed change operation unit.

FIG. 10 is a cutaway front view of a speed change operation unit.

FIG. 11 is a plan view of a transmission guide plate.

FIG. 12 is a cutaway front view of a rotary tilling device.

[Explanation of symbols]

 Reference Signs List 3 front frame 8a foot kick operation part 8 stand 9 spring receiver 10 spring 12 operating tool 13 interlocking tool 14 connecting part 15 second spring receiver

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A01B 33/00-33/08 F16M 13/00

Claims (4)

(57) [Claims] 1. A stand provided with a kicking operation section on a front frame is switchably mounted between a stand posture and a retracted posture, and the stand has a stand posture between the stand and a spring receiver formed on the front frame. If the stand is located closer to the stand position than the intermediate position between the retracted positions, the stand is swung to the stand position, and if the stand is positioned closer to the retracted position than the intermediate position, the stand is moved to the retracted position. A stand device for a walk-behind work machine provided with a stabilizing spring for posture switching that oscillates the operating device, wherein the operating device is provided on the stand such that the operating device provided on the control section switches the position of the stand. Form a connecting part of the interlocking tool for linking, and the spring is detachable from the spring receiver
And a second spring receiver is formed on the front frame so that the spring
From the spring receiver to the second spring receiver.
Swings the stand in the retracted position to the stand position.
A stand device of a walking-type working machine configured to perform . 2. A stabilizing spring and an interlocking device are attached to the left side of the stand.
The stand device for a walking-type work machine according to claim 1, wherein the stand device is arranged to be distributed to the right . 3. An extension of the kick operation section is on a stand side.
3. The stand device for a walking type working machine according to claim 1, wherein said stand device is a spring receiver . 4. A star having a kicking operation section on a front frame.
Switch between the stand position and the retracted position.
Attach this stand and the spring receiver formed on the front frame
Between the stand and the storage position
If the camera is positioned on the stand
Swinging the hand to the stand posture, and
The stand is in the retracted position if it is located closer to the retracted position than
A spring is provided to stabilize the posture switching that oscillates
A stand apparatus for a walking type working machine, wherein the stand
Then, change the attitude of the stand using the operating tool provided on the control unit.
Of the interlocking tool for linking the operating tool to the stand
Form a connection part and attach a spring for stability and an interlock
Stand type of walk-behind work machine distributed to left and right
Place .