JPS60199772A - Transmission structure for wheels of walking type working car - Google Patents

Abstract

PURPOSE:To simplify the switching operation between the drive and the free revolution of the right and left wheels by installing clutch ring bodies onto the right and left output shafts and connecting one clutch ring body to the other by an operating lever and connecting the other clutch ring body to a motive-power side rotary body. CONSTITUTION:When a rotary supporting shaft 35a is turned by the operation of an operating arm, the second clutch ring body 46 compresses the second spring 48 and is connected to the first clutch ring body 45. Further, the first clutch ring body 45 compresses the first spring 47 and is connected to a prime- mover side rotary body 44. Therefore, the right and left output shafts 27 and 31 are put into driving state. When the operating arm is returned to an original position, the rotary supporting shaft 35a turns reversely, and the first and the second clutch ring bodies 45 and the prime-mover side rotary body 44 are departed each other by each elastic retaining strength of the first and the second springs 47 and 48. Therefore, the right and left output shafts 27 and 31 are put into free revolution state. Therefore, the above-described two states can be switched by one operating lever.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a walk-behind working vehicle equipped with a clutch mechanism that switches a pair of left and right running wheels between a state in which they are integrally driven in the same rotational direction and an idle state in which they can rotate independently. Related to wheel transmission structure.

The walk-behind work vehicle described above is configured to allow the machine to move by itself or be moved manually, such as when working with a lawnmower while the machine is moving by itself or by being pushed by hand. Furthermore, the left and right wheels are configured to differentially move by separate free rotation to facilitate steering and turning during human movement. As a clutch mechanism that makes it possible to switch between the integral drive state of the left and right wheels and the separate idle state, there has conventionally been a clutch mechanism for aircraft orientation that is configured to be able to drive and stop the left and right wheels separately. Ta.

In other words, by operating the left and right wheels so that they are both stopped, the left and right wheels are put into an idle state where they can rotate independently.

However, with conventional clutch mechanisms, in order to switch the left and right wheels between an integrated drive state and a separate idle state, it is necessary to operate both of a pair of operating tools that separately drive and stop the left and right wheels. However, there were problems in terms of operation.

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to easily switch the left and right wheels between an integrally driven state and a separate idle state, and to provide a simple operating structure for this purpose.

In the above-mentioned wheel transmission structure for a walking work vehicle, the present invention provides a first wheel drive shaft and a second wheel drive shaft that are concentrically connected to each of the pair of wheels in an interlocking manner to constitute the clutch mechanism. The driving side rotating body is disposed face down, and the driving side rotating body is freely rotated only relative to the first wheel drive shaft, and the first clutch wheel relative to the driving side rotating body is slid to the side of the driving side rotating body. The first wheel drive shaft is engaged with the first wheel drive shaft, and the first wheel drive shaft is engaged with the first wheel drive shaft, and the first wheel drive shaft is rotated and slid integrally with the first wheel drive shaft in a state where the first wheel drive shaft is engaged with the first wheel drive shaft, and is turned off by sliding toward the side away from the driving side rotating body. The second clutch wheel relative to the first wheel drive shaft is disposed on the opposite side of the first clutch wheel from the driving side rotating body, and the second clutch wheel is arranged on the side opposite to the driving side rotating body, The second wheel drive shaft rotates integrally with the second wheel drive shaft in such a state that it enters into the groove that engages with the second wheel drive shaft by sliding, and is cut by sliding toward the side away from the driving side rotating body. The first clutch wheel body and the second clutch wheel body are slidably attached, and the first clutch wheel body and the second clutch wheel body are interlocked to slide in the same direction, and one of the first clutch wheel body and the second clutch wheel body is connected to the seven The operation and effects are as follows.

That is, by operating the seven operating tools, both the first and second clutch wheels slide toward the entering side or the cutting side, and the first wheel drive shaft is interlocked and connected to the driving side rotating body. The second wheel drive shaft is interlocked and connected to the first wheel drive shaft so that the left and right wheels are integrally driven, or the connection between the first wheel drive shaft and the driving side rotating body is released and the first wheel drive shaft Then, the connection between the second wheel drive shaft is released and the left and right wheels enter an idle state in which they can rotate independently.

Moreover, both the first and second clutch transport bodies are disposed on the same lateral side of the driving rotating body and are slidable into the driving rotating body. By configuring this structure, both clutch wheels are interlocked with a simple interlocking structure, as will be explained in detail in the later embodiments, and one clutch wheel is interlocked with an operating tool, which is a simple interlocking structure. This makes it possible to operate the seven operating tools in sequence so that both clutch wheels are placed on the on-going side or on the off-going side. In other words, unlike the conventional clutch mechanism in which the first clutch wheel and the second clutch wheel are arranged on both sides of the driving side rotating body, both clutch wheels are reversed when the operating tool is operated. Composition of a dam that slides in the direction.

In other words, it is not necessary to provide a structure in the operating system so that the operating force is transmitted to both clutch wheels in a branched manner, and the direction of action of the operating force applied to both clutch bodies is reversed. Therefore, the left and right wheels can be switched between the integrated driving state and the separate free running state with a simple operation of operating seven operating tools, and the operating configuration can be obtained with a simple structure. A convenient device that can be used separately for self-propelled type and manually-propelled type is advantageous in terms of switching operation and cost.

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

As shown in Fig. 1, a pair of left and right free rotating front wheels (la),
(lb), drivable rear wheels (2a), (2b), an engine (3), and a control handle (4).
The reel-type lawn mowing cutter (5) can be installed close to the wall (> so that it can be mowed with force, or 6i to make it easier to identify the cutting 1υ1 work area.
It is mounted on the 1iJ side of the J wheels (la) and (lb) and placed in the front 'r and ra parts of the cut grass scattering prevention cover (6), and is attached to the inside of the cover (6). Then, the cut grass container (7) is configured to collect and store the cut grass scattered backward by the rotation of the cutter (6).
Moreover, it is provided so that it can be inserted and removed from the rear of the machine body, thereby configuring a walk-behind lawn mower.

As shown in FIG. 2, the support member (9) of the fixed blade (8) is attached to the support shaft (10) on the cover (6) so that the fixed blade (8) approaches the cutter (5). The mounting position can be adjusted by vertically swinging around the support port (11) extending from the support part m (s+ to the upper surface side of the cover (6), and the cover (11) of this bolt (11).
The support member (9) is configured to be fixed in the adjusted position by the butterfly nut I-(121) attached to the protrusion from the support member (9) and the nup ring 03 for biasing the support member (9) downward. ), the position of the fixed blade (8) relative to the cutter (5) can be adjusted by adjusting the mounting position of the fixed blade (8).

As shown in FIGS. 2 and 8, the front wheel (la).

(lb) Each support arm Q4) is attached to the cover (6) via a support shaft (15) so as to be swingable up and down, and a spring plate extends from the support arm (14) so as to be swingable integrally. By swinging the control lever (16), the front wheel (1a)
Alternatively, (1b) is configured to adjust the outer position of the aircraft. Then, a locking tool θ to be attached to the operating lever (16) is fixed to the cover (6), and the locking tool θ is fixed to the operating lever (16).
By selectively inserting and locking the pin +1119 attached to <-(+e) into the plurality of pin holes (17a) arranged in parallel on the locking tool 07), Leno<-(16
1 is locked so that it cannot swing, and the front wheel (1a) or (1b
) so that it is fixed at the adjustment height and /<-
(16) is elastically deformed to lock the pin (18) (
17), the operating lever (country lock) is released by pulling it out from the left and right front wheels (LA).
.

(1b) is installed so that the cutting height can be adjusted according to the height adjustment.

In order to drive the cutter (5) and the rear wheels (2a) and (2b), an engine (3) is used as shown in FIG.
) is attached to the output shaft (3a) of the belt tension type main clutch (
The intermediate transmission shaft (
20) is provided above the front end side of the cover (6) while being installed inside 1) in the first transmission case, and the intermediate transmission shaft (
20), connect the transmission chain (a) inside the chain case (2 bottles) + f: to the rotating shaft (5a) of the cutter (5).
It is linked and linked. Then, the intermediate transmission shaft (zO
) is connected to the rear end side of the cover (6), and is configured to input the rotational force of In addition to providing the second transmission case above,
Connect the left output shaft (2) to the left rear shaft (goa) via the internal transmission chain (29b) to the chain case (28a).
The right output shaft (31) of the second transmission case (26) is connected to the chain case (28b) internally.

It is interlocked and connected to the right rear axle (80b) via a transmission chain (29b).

As shown in FIG. 8, the end of the cutter rotation support shaft (5a) on the opposite side to the input side projects outward from the side of the cover (6), and a rotary cutter for cutting grass is attached to this projecting end. Connector 13 for attaching taa so that it can be removed and rotated integrally
3), as shown in Figure 4, when the rotary cutter (32) is attached and the grass is removed from unnecessary areas such as around the roots of trees and roads, it cuts along the greenery of unnecessary areas. This makes it possible to construct an edge trimmer that cuts the grass including its roots.

The second transmission case (company) includes left and right rear wheels (2a),
(2b) A clutch mechanism (34) that switches between a state in which the motors are integrally driven in the same rotational direction and an idle state in which each motor can freely rotate.
and a lever set clutch operating tool (37) interlockingly connected to the swinging operating arm (35) of this clutch mechanism (341) via a release wire (36).
As shown in Fig. 5 and Fig. 5, the wheel drive position (ON) is operated with the hand gripping the control handle (4) and while operating the swing operating lever 08) of the main clutch α9) to the clutch engaged position. The control hand 7v is swingably attached to the control handle (3) in close proximity to the grip part of the 4i and the main clutch operating lever (38), so that work can be carried out while the aircraft is moving on its own. It is constructed so that it can be operated while being pushed or moved manually.

The clutch mechanism (34) is constructed as shown in FIG.

That is, the pair of output shafts t27! , (31) are arranged concentrically, and a bevel gear (140) is attached to the input shaft (39).

Ω1), the transmission shaft (421 and the driving side rotating body +44) interlocked via the spur gear (43) is externally fitted to the right output shaft (3) so that only relative rotation can be freely performed.The driving side rotating body (
44) against the first clutch wheel (the first clutch), the right output shaft @
1) so that they rotate and slide together through spline engagement, and are also slid to the side of the driving side rotating body circle to connect the first clutch wheel (the clutch pawl (45a) and the driving side rotating body ( When the reconnaissance clutch claw (44a) is engaged,
1. It entered the entry position and also engaged with the right output shaft (31). The driving side rotating body (44) and the right output shaft (
31) so as to rotate integrally with the clutch pawls (44a), and slide the clutch pawls (44a) toward the side away from the driving side rotary body.

When the engagement of (45a) is released, the driving side rotary body (45a) is configured to allow relative rotation between the right output shaft (31) and the right output shaft (31) depending on the cutting position. The second clutch wheel body (46) is integrated with the left output shaft (27) by Nupline engagement with the first Kuwotsuchi wheel body (4 hills and placed on the opposite side from the driving side rotor (Koji). The second clutch wheel body (46) is attached so that it can rotate and slide, and is also slid on the side of the driving side rotating body (44).
) clutch pawl (46a) and first clutch wheel body (45)
When the clutch pawl (45b) is engaged, it becomes the clutch engaged position and remains engaged with the left output shaft (27), and both the left and right output shaft shifters 1° (3I) are rotated together. and the driving side rotating body (44
Slide both clutch pawls (46a) away from I.
, When the engagement of (45b) is released, the clutch is in the disengaged position and both output shafts (2-force) are released.

(31) is configured to enable relative rotation.

Then, the driving side rotating body (44) and the first clutch wheel body (44)
5), the first spring (47) is connected to the driving side rotating body (
44) and the first clutch wheel body (40), the relative rotation thereof is enabled by sliding contact with at least one of the first clutch wheel body (40), and the sliding of the first clutch wheel body ← to the side of the driving side rotary body circle by elastic compression deformation. In addition to intervening in a state that allows for movement,
Between the first clutch wheel (40) and the second clutch wheel,
The second clutch (481) is connected to the first and second clutch
45) and +46+ by sliding contact with at least one of them, and by elastic compression deformation, the driving side rotating body (44) of the second clutch transport body (46)
Both clutch wheels (or decoys) are interlocked so that they slide in the same direction, that is, in the direction in which they both enter or in the direction in which they disengage. That is, when the second clutch wheel body is slid toward the engaged position, this operating force is applied to the second spring (
48I or the second clutch wheel (46)
The first clutch transfer body (transmitted by contact with the first clutch)
The clutch wheel (40) is also slid toward the engaged position, and when the second clutch wheel (46) is slid toward the disengaged position, the first clutch wheel (40) is moved toward the first spring (4η Due to the elastic restoring force of 49) is connected to the rotation support shaft (8) of the operating arm (35).
5a) so as to be integrally rotatable with the second clutch wheel body (
46) is interlocked and connected to the operating tool (37), and when the operating tool's force is set to the drive position (ON), both the cooler latch wheels (46) enter the engaged position, and the operating tool becomes idle. When the position is turned OFF, both clutch wheels (45),
146) are both at the cutting position,
Rear wheel (2a).

Switching between the driving state (2b) and each free rotation state can be performed using seven operating tools (37).

Both springs (47) are arranged so that the operating force required to compress and deform the first spring (471) is greater than the operating force required to compress and deform the second spring (481).
, (4g) are set differently, and when the rear wheels (2a) and (2b) in the idle state are switched to the driving state, the second clutch wheel body (46) (
The structure is such that the first clutch wheel body (45) engages with the driving side rotating body (44) after engaging the four members, and the first clutch wheel body (40) is arranged before the second clutch wheel body (46). This is to prevent the danger of the aircraft turning unexpectedly when the aircraft enters the air.

In the above embodiment, since the first clutch wheel (4) is also used as the clutch member on the right side output shaft Gl that engages the second clutch transport body (46), both clutches The interlocking of the wheels (45) and (46) is carried out by the second spring (481 or both clutch transponders T45) and +46.
1 and the first spring (47), and is interlocked and connected to the second clutch wheel (the double one is the operating tool 137), and the member engages with the second clutch wheel H[3]. is provided on the first clutch wheel body (separately from the right side output shaft (31) so that it can only rotate integrally, and both clutch wheels (411iJ
, +46) may be interlocked by an interlocking tool such as a rond, and the first clutch ring body (center side) may be interlocked with the operating tool (37) at an interlocking length.

The left and right output shafts (2n, tal) can be changed to axles, and the left output shaft (2η is called the second wheel drive shaft (27), and the right output shaft (31) is called the first wheel drive shaft (31). to be called.

The present invention can also be applied to various types of walk-behind working vehicles such as water and chemical sprayers, tillers, and reapers.

[Brief explanation of the drawing]

The drawings show an embodiment of the wheel movement structure for a walk-behind working vehicle according to the present invention; FIG. 1 is a side view of a walk-behind lawn mower, and FIG.
The figure is a side view of the front wheel outer lowering node, Fig. 8 is a partially cutaway plan view of the transmission system, Fig. 4 is a side view of the edge trimmer state, and Fig. 5 is a plan view of the clutch lever installation part. , FIG. 6 is a partially cutaway plan view of the clutch mechanism. (2a), (2b)... Wheels,...
...Second wheel drive shaft, (31)...First wheel drive shaft, (3 cars...clutch mechanism, G37)...
・・・・Operation tool, (reconciliation...・driving side rotating body, (
45)...First clutch transfusion, (46)...
...second clutch transfusion. Agent Patent attorney Shudai Kitamura 6rA Procedural amendment 1935 f1″7 11J/II Patent Office Commissioner Ruyaku 2 Name of invention Wheels of walking work vehicles rJJ structure 3 Person making amendment Relationship to case Special Applicant address Naniwa-ku & Tsuka/chome J, Osaka City, Osaka Prefecture Name (105) Kubota Iron Works Co., Ltd. 4th generation Hiroto Showa Year Month/Date (shipment date) 7. Contents of amendment 8A Thin MfXS page 10, line j Eye ``transmission chain (g9b
) J 'i "Transmission chain (29a) Correct to J.

Claims (1)

[Claims] ■ A clutch mechanism (34I provided) that switches the pair of left and right running wheels (2a) and (2b) between a state in which they are integrally driven in the same rotational direction and an idle state in which they can rotate independently. The transmission structure for wheels of a walking work vehicle includes a pair of the wheels (2a) and (2b) constituting the clutch mechanism (goods).
), the first wheel drive shaft (1) and the second wheel drive shaft (27) are arranged concentrically and interlocked and connected to the first wheel drive shaft (31). The first wheel drive shaft (31) is hardened outwardly only by rotation, is inserted while remaining engaged, and is cut by sliding toward the side away from the driving side rotating body (44I). The second clutch wheel body (46) is integrally rotatably and slidably attached to the first wheel drive shaft (46).
By sliding toward the driving side rotating body (located on the opposite side to 44I and on the driving side rotating body) with respect to the machine, the second wheel drive shaft is inserted while remaining engaged with the second wheel drive shaft. and the driving side rotary body (attached to the second wheel drive shaft (27) so as to be integrally rotatable and slidable in a state in which it is turned off by sliding from the open position to the side away from the drive side, and the first clutch wheel body (45) and the second clutch wheel (46) are interlocked so that they slide in the same direction, and one of the first clutch wheel (45) and the second clutch specimen (46) is A transmission structure for a wheel of a walking work vehicle which is interlocked and connected to an operating tool (37). ■ The second clutch wheel body (46) is a clutch transport body that engages and disengages from the first clutch wheel body (44). The wheel transmission structure according to claim 0, wherein the operating tool (37+) is interlocked and connected to the second clutch wheel body (46).