JPH0621296Y2 - Separation and connection structure in work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a separating and connecting structure of a power unit side and a working device unit side in a working machine such as a brush cutter.

(Prior Art) Conventionally, when a work machine such as a brush cutter has a long length as a whole, a power unit (equipment) of the equipment is provided so as to facilitate storage during storage or handling during transportation. For example, an engine) and a working device (for example, in a brush cutter, a rod portion having a cutting blade rotatably provided at its tip) side can be freely separated and connected. is there. A typical example of such a structure that can be freely separated and coupled is shown in FIG.

That is, the output shaft 4 having a hollow tip is projected into the casing 1 of the power take-out portion formed on the output shaft 4 side of the power unit A of the working machine, and the output shaft 4 on the working device B side of the output shaft 4 is projected. In the casing 1, a cylindrical support portion 1A that is open to the working device portion B side is formed, and a pipe-shaped clamping member that clamps the coupling 10a 'of the rod 10 on the working device portion side to this supporting portion 1A ( Holder) 2
Is inserted. An axial slit 2a is formed on the holding member 2 from the tip to the base end side, and bolt mounting holes are formed on both sides of the tip of the holding member 2 separated by the slit 2a. Flange 2 with 2b ″ and 2c ″
The b and 2c portions are formed, and the bolts 3 (see FIG. 6) that are sandwiched between the holes 2b ″ and 2c ″ are attached. Then, the connecting portion 10a 'of the rod 10 on the side of the working device B is rotated integrally with the sandwiching member 2, and the propeller shaft 15 in the connecting portion 10a' is integrally rotated with the hollow portion at the tip of the output shaft 4. So that they can be separated from each other by tightening the bolts 3 (see FIG. 6) that are sandwiched between the holes 2b ″ and 2c ″ of the flanges 2b and 2c. It is composed (No. 50-36295).

As another configuration, as shown in FIG. 7, an output shaft (not shown) on the power unit A side on the working device B side
A connecting portion C having a built-in mechanism for connecting with is integrally formed, and the connecting portion C is screwed to a predetermined position on the power portion A side by a plurality of bolts 3'to separate them. There was one that was configured so that it could be freely combined (Shokaisho 60-411
No. 28).

(Problems to be solved by the invention) However, in the case of the former structure, as shown in FIG.
As shown in FIG. 6, since the flanges 2b and 2c and the sandwiching bolt 3 attached thereto are projected outward from the casing 1, when the worker performs work, the projecting flanges, etc. However, there is an inconvenience that the workability is impaired by interfering with the worker's arm or the like. Further, when connecting the power unit A side and the work device unit B side, there is no one that specifies the fixed position (joint position) of the power unit and the work device unit, and since the visual check is performed exclusively by intuition. There is a case where they are coupled in a state of being deviated from each other, and in that case, the usability of the working machine is changed and the workability is impaired.

Also, in the latter case, although there is no such inconvenience as described above, it is necessary to tighten or loosen the plurality of bolts 3 ′ each time the power unit A side and the working device unit B side are separated and coupled, There is an inconvenience that it takes a lot of time to separate and combine.

The present invention has been made in view of the above situation, and has a structure in which a power unit side and a working unit side of a working machine can be easily separated and coupled, and the workability is not impaired by protruding at that portion. It is an object of the present invention to provide a separation coupling structure.

(Means for Solving the Problems) In the separation coupling structure for a working machine according to the present invention, a casing for the power take-out portion is formed on the output shaft protruding side of the power portion, and a slit is formed in the casing in the axial direction. A hollow clamping member is inserted and attached, and bolt mounting holes for narrowing the width of the slit are formed at both sides of the slit of the clamping member, and the clamping bolt is inserted into the mounting hole. In a separating and connecting structure of a working machine, which is configured to hold and release a connecting portion of a rod on the side of a working device inserted into the holding member by attaching and rotating the bolt. An opening for rotating the bolt is formed in the casing to face the bolt attachment hole inward, and the head of the bolt is projected from an imaginary surface formed by extending the head surface of the casing. So that there is no Characterized in that it was wearing.

(Operation) With the above-described structure, however, the bolt for separating and connecting the power unit side and the working device side and the member such as the flange for attaching the bolt are the casing of the power takeout unit. It does not interfere with the worker's arm etc. by protruding further outward, and moreover, by simply inserting a screwdriver or a tool such as a hexagonal wrench into the opening formed in the casing and rotating the bolt by a predetermined angle, it is sandwiched. The gap between the slits of the member can be adjusted, and as a result, the power section side and the working apparatus section side can be easily separated and connected.

(Example) Hereinafter, an example in which the present invention is applied to a reaper will be described with reference to the drawings. FIG. 1 is a partial side view showing a sectional view of a main part of the separation and coupling structure according to this embodiment, and FIG. 2 is a partially cutaway view I- of FIG. 1 showing an arrangement state of bolts and flanges for sandwiching. FIG.

In FIG. 1, A is a power unit composed of an engine, and B is
Is a working device section in which a cutting blade (not shown) is attached to the tip through the rod 10. In the power section A, the casing 1 of the power take-out section is formed integrally with the engine cover 11. A pipe-shaped holding member 2 is held and formed in the casing 1, and the holding member 2 is configured to hold the joint portion 10a of the rod 10 in the side view of the working device section B. .

The sandwiching member 2 is formed with an axial slit 2a for separating a part of the annular shape, and on both sides of the slit 2a sandwiching the slit 2a, as shown in FIG.
2b and 2c are formed.

On this one flange 2b (left side in FIG. 2), a female screw hole 2b '(see FIG. 1) that is screwed into the bolt 3 to be sandwiched.
Is formed, and a through hole (not shown) for allowing the bolt 3 to penetrate is formed in the other flange 2c (right side in FIG. 2).

Then, as shown in FIG. 2, the bolt 3 is passed through a through hole (not shown) of the flange 2c to form a flange.
By screwing (attaching) to the female screw hole 2b 'of 2b and rotating the bolt 3, the inner peripheral diameter of the sandwiching member 2 is changed by the size of the width (gap) of the slit. You can As shown in FIG. 2, the casing 1 is provided with an opening 1a inwardly so as to face through holes (not shown) of the flanges 2b and 2c and female screw holes 2b '(see FIG. 1). Is formed, and in this embodiment, from the opening 1a, the bolt 3 described above is formed.
It is configured so that it can be attached and detached and rotated.

Also, when the bolt 3 is screwed into the female screw hole 2b '(see FIG. 1), the head of the bolt 3 extends the surface of the casing 1 around it as shown in FIG. The positions of the flanges 2b and 2c and the length of the bolt 3 are configured so as to enter inward from the virtual surface (see the solid line) 6 formed as described above.

By the way, as shown in FIG. 1, the sandwiching member 2 is formed in the casing 1 by being held by a cylindrical supporting portion 1A inside the casing 1 via a cushioning member 12 made of rubber. Has been done.

The holding portion 1A also rotatably supports the output shaft 4 via a bearing 13 at the base end side (right side in FIG. 1) thereof.

The output shaft 4 has a base end side (right side in FIG. 1) connected to the clutch drum 14 of the engine, and a front end side (left side in FIG. 1) is formed in a hollow shape having a non-circular cross section. A proximal end portion (right side in FIG. 1) of a propeller shaft 15 rotatably disposed inside the rod 10 is connected to the hollow so as to rotate integrally with the output shaft 4.

A cover member 5 having an opening 5a for allowing the rod 10 and the propeller shaft 15 to penetrate therethrough is screwed to the end surface of the casing 1 on the side of the working device B.
As shown in FIG. 3, a triangular alignment mark (particularly not necessarily triangular) 16 is provided at a position near the outside of the opening 5a of the lid member 5 and the rod 10 penetrating the lid member 5, as shown in FIG. It is attached so that the engine side and the working device section B side can be properly and promptly connected in terms of rotational angle.

Therefore, the separation / coupling structure of the working machine configured as described above acts as follows when the power unit A side and the working device unit B side are separated / coupled. That is, when separating from the combined state shown in FIG.
If you insert a screwdriver etc. from it and rotate the bolt 3,
The inner peripheral diameter of the clamping member 2 is increased (the width of the slit is increased), and the connecting portion 10a of the rod 10 is clamped from the outer peripheral side.
The rod that has the propeller shaft 15 installed
10 can be easily pulled out to the working device section B side.

When connecting the separated work device section B to the power section A, by confirming that the bolts 3 are loosened in the reverse order of the above procedure, the work device is opened from the opening 5a of the lid member 5. Part B
If the rod 10 is inserted into the sandwiching member 2 in such a manner that the base end portion of the propeller shaft 15 is inserted into the hollow portion of the output shaft 4 and integrally rotatable, the rod 10 is brought into a predetermined coupling position state. Become. At this time, as shown in FIG. 3, the lid member 5 and the rod 10
By aligning the above-mentioned alignment marks 16 attached to the, it is possible to easily combine them in the predetermined position state as described above.

Then, in this state, if the bolt 3 shown in FIG. 2 is tightened, the inner peripheral diameter of the holding member 2 becomes smaller, and the holding member 2 holds the connecting portion 10a of the rod 10 from the outer peripheral side. As shown in FIG. 1, the power unit A side and the work device unit B side are integrally connected.

And a work machine (mower) that is easily combined in this way
When working, the bolt 3 from the outer surface of the casing 1
Since it does not project, nothing interferes with the worker's arm etc.,
You can work efficiently.

Further, as shown in FIG. 4, by forming the casing 1 ′ into a shape in which the upper surface 1u side is substantially flat and the lower surface 1l side is rounded in FIG. 4,
It is possible to improve the comfort of holding this part, as compared with the case where the square shown in FIG. 1 has a substantially flat shape.

(Effects of the Invention) However, since the separating / connecting structure of the working machine according to the present invention is configured as described above, the power unit and the working device section can be easily separated / connected to each other, so that In addition to shortening the preparation time, when performing work in a state where the power unit side and the work device unit side are connected, there are things such as bolts for fastening and flanges for fastening that project from the casing of the power takeoff unit. Workability is improved by not having it.

Moreover, the appearance is very simple and the design is excellent.

[Brief description of drawings]

FIG. 1 is a partial side view of a main portion showing a separation and coupling structure according to this embodiment, and FIG. 2 is a partial cutout of a casing showing a state of arrangement of bolts for clamping.
-I arrow view, FIG. 3 is a perspective view showing a part of the rod and the power section showing the alignment state of the alignment mark, and FIG. 4 is the same direction as FIG. 2 showing the shape of the casing according to another embodiment. From FIG. 5, FIG. 5 is a side sectional view of a main part showing a separation and coupling structure according to a conventional example, FIG. 6 is a view taken along the line II-II of FIG. 5, and FIG. 7 is a separation according to another conventional example. It is a perspective view which shows a coupling structure. A ... Power part, B ... Working device part, 1 ... Casing, 1a ... Opening part, 2 ... Clamping member, 3 ... Bolt, 6 ... Virtual surface.

Claims (1)

[Scope of utility model registration request] 1. A casing for a power take-out portion is formed on a side of an output shaft projecting side of a power portion, and a hollow holding member having a slit formed in the axial direction is inserted into the casing, and the holding member A bolt attachment hole for narrowing the width of the slit is formed on both sides of the slit, and the attachment bolt is attached to the attachment hole, and the bolt is rotated to rotate the attachment. In a separate coupling structure for a working machine configured to clamp and release a coupling part of a rod on the side of a working device that is inserted into a member, for rotating a bolt that faces the inside of the bolt mounting hole in the casing. The opening of the bolt is formed, and the bolt is attached to the bolt attachment hole so that the head portion does not protrude from an imaginary surface formed by extending the casing surface around the opening. Separation and coupling structure in working machines.