JPS6255273A - Operating device for walking type power working machine - Google Patents

Abstract

PURPOSE:To improve the operability of clutch engagement and brake operation by connecting a single operating lever performing clutch engagement and brake operation to a clutch mechanism and a brake mechanism and providing an extension section extended between the right and left handles on this operating lever. CONSTITUTION:A clutch brake lever 49 performing clutch engagement and brake operation is arranged between the right and left handle pipes 12, 12. This clutch brake lever 49 is fitted to handle pipes 12a, 12a swayably up and down and is provided with an extension section 49a extended between the right and left handle pipes 12, 12. When the lever 49 is swayed downward, the clutch is disengaged then brakes are applied; and when the lever 49 is swayed upward, brakes are released then the clutch is engaged. Accordingly, clutch engagement and brake operation can be easily performed.

Description

[Detailed description of the invention] (Industrial application field) 4 The present invention relates to an operating device for a walking type work machine.

(Prior Art and Problems to be Solved by the Invention) Since the clutch mechanism and the brake mechanism have completely different operating systems, their operating members are usually provided separately. .

However, especially in various walk-behind working machines such as transport vehicles, power tillers, snow blowers, etc., it is extremely inconvenient to operate two operating levers each time the brakes are applied.

In addition, in the past, since straight rod-shaped operating overbars are swingably attached to the left and right handles, when the levers are swung, the bottom ends of the operating levers may move away from the positions of the left and right handles. The problem was that it was difficult to operate.

The present invention has been devised in view of the above circumstances, and an object of the present invention is to be able to engage/disengage the clutch and apply the brake with a single operating lever, and to easily perform the operations. An object of the present invention is to provide an operating lever for a walk-behind work machine that can perform the following operations.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a walk-behind working machine having left and right handle pipes on the machine body, which are connected to a clutch mechanism and a brake mechanism through connection mechanisms, respectively, and one An operating lever is provided, which turns the clutch mechanism into a disengaged state by swinging to the opposite direction, then puts the brake mechanism into a braking action, and sets the clutch mechanism to a connected state after swinging the brake mechanism to the released state by swinging to the other side. The present invention is characterized in that an extending portion extending between the left and right handle pipes is provided.

(Function) The clutch can be connected/disconnected and the brake can be applied by operating a single operating lever, and the extension that extends across the left and right handles is always located in front of the operator, making it easy to operate. Extremely convenient.

(Example) Hereinafter, a case will be described in which an example of the present invention is applied to an operating device for a crawler-type carrier.

FIG. 1 shows a side view of the crawler-type transport vehicle.

(1) is a crawler type transport vehicle, (2) is a drive wheel, and (3) is a crawler type transport vehicle.

(3) and (4) are the driven wheels, (5) is the crawler, (6) is the vehicle body frame, and the vehicle body frame (B) J2 is the support i1.
+ (7) 'it- A tiltable loading platform (8) is provided as a fulcrum, and a bracket is installed at the rear of the vehicle body frame (8).
A handle pipe (12) extends diagonally rearward through the handle pipe (11), a pair of left and right handle pipes are provided, and a drive device (13) is provided at the rear end of the vehicle body frame (6).

The drive device (13) includes a vertical engine (15) with a vertical crankshaft, a transmission mechanism that converts the speed ratio of the engine power and transmits it to the drive wheels (2), a brake mechanism (1B), and a clutch mechanism ( 17), consists of a side clutch mechanism, etc., and (18) in the figure shows the gear shift lever.

The brake mechanism (16) and clutch mechanism (17) are expandable as shown in FIGS. 2 and 3, respectively, and the brake mechanism (16) is connected to the brake via a brake cable (21) and a brake arm (22). Swing the cam (23),
Braking is performed by pressing the brake shoes (24), (24) against the brake drum (25) and separating them.
The release is performed, and (26) in the figure shows the return spring.

In addition, the clutch mechanism (17) includes a clutch cable (3) and a clutch cable (3).
1), the clutch cam (
33) and clutch shoes (34), (34).
The clutch is connected and disconnected by separating and pressing against the clutch outer (35), and (36) in the figure shows the return spring.

A bent portion (12a) is formed near the rear end of the handle pipe (12) as shown in a plan view in FIG. 4, a side view in FIG. 5, and a perspective view in FIG. 6. A grip (
41).

A cross member (45) is installed between the left and right handle pipes (12) in the vicinity of the bent portion (12a), and brackets (51) project downward from the left and right bent portions (12a), respectively. , (52), a clutch brake lever (4) which connects/disconnects the clutch and applies the brake.
8). Raise the bracket (47) from the left side of the cross member (45), and
A throttle lever (48) is provided through the bracket (47) and the left handle pipe (12).
Bracket (75), screw (55), etc.
・Attach the force/<-(59) through the cover (5B) to cover the operation part (48b) of the throttle lever (48).
(7) Cover (56) exposed on the inclined surface (58a)
An emergency button (57) for stopping the engine in an emergency is provided on the upper end surface (5111b).

The clutch brake lever (48) has a substantially gate-like shape, and has an extension part (49a) extending between the left and right pipe frames (12), and a part bent from both ends of the extension part (49a). The bearing part (at) comprises extending legs (49b), (411b) and a bearing part (81) fixed to the end of the leg part (49b).

(61) is the bracket) By fitting into the supporting shafts (82) and (+33) protruding from (51) and (52), it is possible to swing vertically relative to the handle pipes (12a) and (12a). mounted on.

The left bearing part (81) is provided with an L-shaped first shaft member (65) extending inward in the vehicle width, and the left leg part (411
b), an L-shaped second shaft member (6
6) Protrude.

Throttle valve, brake mechanism (16), clutch mechanism (
Cables (71) and (72) connected to 17) respectively
, (73) are outer (71a), (72a), (7
3a) is installed by attaching it to the bracket (75) extending from the left handle pipe (12).

The cable (73) of the brake mechanism (16) and the tarlatch brake/release lever (49) are connected to the first shaft member (6).
5), a shaft member (82) attached to the inch (?3b) end, and a locking portion (81) of the mounting piece (81).
1a) and the connection between the cable (72) of the clutch mechanism (17) and the clutch brake lever (48) via a compression coil spring (84) interposed between the spring bearing (83) of the shaft member (82), etc. This is done by attaching the inner (72b) to the second shaft member (66). Clutch brake lever (4
8) The lower limit position (a) and the - limit position (b) are bracketed respectively) (51)'s connecting pieces (51a) and (51b),
A tension coil spring (8B) is stretched between the second shaft member (68) and the bracket (75) and extends over the support shaft (62).
).

Then, the clutch is temporarily disengaged by swinging the clutch brake lever (49) from the upper limit position (B) to the lower limit position (A), and then the brake is applied, and from the lower limit position (A) to the eye position ( The structure is such that the clutch is engaged after the brake is released by swinging to (b).

In addition, the cables (71) and (72), the mounting piece (81), the shaft member (82), and the compression coil spring (8
4), etc., make adjustments and install the clutch brake lever (
When the brake shoe (48) swings clockwise, the brake shoe (2
4) Even after the brake drum (25) is stopped by steps (24), the compression coil spring (84) is set so that it swings while being compressed and is held at the lower limit position (a).

Since this embodiment is configured as described above, it is possible to connect/disconnect the clutch and apply the brake by operating a single clutch/brake lever (49), thereby improving the operability of various walk-behind work machines. can.

Also, the clutch brake lever (49) extends! (411
8) is always located in front of the operator, so it is easy to reach out from the handle grip (41) and easily operate it.

(Effects of the Invention) As described above, according to the present invention, it is possible to engage/disconnect the clutch and apply the brake with a single operation lever, and the operation lever can be easily operated, and various walking-type tasks can be carried out. The operability of the machine can be greatly improved.

[Brief explanation of the drawing]

Figure 1 is a side view of the crawler transport vehicle, Figure 2 is a schematic front view of the brake mechanism, Figure 3 is a schematic front view of the clutch mechanism, Figure 4 is a plan view of the handle, and Figure 5 is the same side view. figure,
FIG. 6 is a perspective view of the same. In the drawings, (12) is a handle pipe, (16) is a brake mechanism, (17) is a clutch mechanism, (48) is an operating lever, and (49a) is an extension part.

Claims (1)

[Scope of Claims] A walk-behind work machine having left and right handles on the machine body, which is connected to a clutch mechanism and a brake mechanism through connection mechanisms, respectively, and which disengages the clutch mechanism by swinging in one direction and then brakes the machine. An operating lever is provided which causes the mechanism to perform a braking action, and which releases the brake mechanism by swinging to the other side and then connects the clutch mechanism, and the operating lever is provided with an extension portion extending between the left and right handles. An operating device for a walk-behind work machine characterized by: