JPH10304708A - Work machine connecting structure of traveling work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the work machine connecting structure of a traveling work machine, by which the bracket of the work machine is stably fitted and fixed to the hitch of a traveling machine body by means of a holder. SOLUTION: The holder 9 provided with an upper side and a lower side inside the bracket 30 of work machine connecting structure for connecting the work machine to the traveling machine body so as to be attachable/ detachable by putting left and right connecting pins 7 to the both in a state where the hollow bracket 30 arranged in a work machine frame 3 is fitted through a hitch 20 which is provided with a U-shape in a cross section is provided in the traveling machine body so as to be slide-fixing possible by the operation of a fitting tool 8. Then, the connecting pins 7 are penetrated through the upper side and the lower side and also a cam hole 92 which is slid and moved by the fixing operation of the fixing tool 8 so as to pressurize the front surface of the bracket 30 to the hitch 20 by contact along the connecting pins 7 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work machine connecting structure of a traveling work machine for mounting a work machine such as a tilling device to a traveling work machine such as a cultivator, a tiller, a tractor or the like.

[0002]

2. Description of the Related Art An apparatus disclosed in Japanese Utility Model Laid-Open Publication No. 1-172304 is a conventional structure for attaching a tilling device (working machine) to a hitch having a U-shaped cross section formed at the rear of a tilling machine. Proposed.

[0003]

The work machine connecting structure according to the prior art has a structure in which a bracket formed at the tip of a working machine frame is inserted into a hitch formed on the cultivator side and left and right are connected to each other. In connecting through the pins, a cam member (holder) formed of a cast block having a cam-shaped notch engaging with the left and right connecting pins is slidably provided in the bracket in the longitudinal direction. In this structure, the cam member is fastened and fixed by a screw while being engaged with the connecting pin.

[0004] Therefore, there is a drawback that the screws are loosened due to the load or vibration during the work such as the tilling work and the backlash is easily generated, and when the backlash occurs, the bracket is inclined and supported with respect to the hitch. Further, since the cam member is manufactured by casting, there is a problem that the weight increases and the cost increases. Further, when the connecting pin is engaged with the wide cam surface formed on the cam member, there is a problem that the connecting pin is apt to rattle and play easily.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the conventional apparatus, a work machine connecting structure of a traveling work machine according to the present invention comprises a hitch 20 having a U-shaped cross section formed on a traveling machine body 1. A working machine connecting structure in which the working machine 6 is detachably connected to the traveling machine 1 by inserting the left and right connecting pins 7 into the two while the hollow bracket 30 provided on the frame 3 is inserted. In the bracket 3
0, a holder 9 having an upper side 6b and a lower side 9c is provided so as to be slidably fixed by operation of the fixture 8,
The connecting pin 7 penetrates through the upper side 9b and the lower side 9c, and is slid by the fixing operation of the fixing tool 8,
The front surface of the bracket 30 is hitch 2 along the connecting pin 7.
A cam hole 92 to be pressed against zero is formed.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a traveling work machine according to an embodiment of the present invention;
Reference numeral 1 denotes a teal-type traveling machine (traveling work machine), which is a hitch (connecting member) 2 formed at the rear of the machine frame 2 having an engine 1a, traveling wheels 1b, a handle 1c, and the like.
A tilling device (working machine) 6 having a transmission case 5 provided with a rotatively driven tilling claw 5a on the working machine frame 3 is detachably provided in a connecting structure described later with respect to 0.

The connecting structure includes a hitch 20 having a cross section formed in an inverted U-shape at a rear portion of the frame 2 of the machine,
A bracket 30 formed according to the cross-sectional shape of the bracket 30 without leaving a large gap in the bracket 30.
The holder 9 includes a holder 9 inserted therein, and a fixture 8 for fixing the holder 9 by pushing and pulling the holder 9 in the bracket 30. Pin holes 21, 22, and 23 are opened in the hitch 20. , The center pin (connecting pin) passing through the hitch 20, the bracket 30, and the holder 9 as shown in FIG.
7S and side pins (connection pins) 7, 7 are provided to connect and fix the hitch 20 and the bracket 30 via the holder 9.

The center pin 7S can be conveniently used when it is attached to another working machine such as a hoe. In the present invention, the center pin 7S can be used even when the center pin 7S is removed. Next, the configuration of the bracket 30 provided at the tip of the work machine frame 3 will be described with reference to FIG.

The bracket 30 has an upper side, a front side, and a lower side formed in an inverted U-shaped cross section, and is fixed to a mounting plate 33 provided at a front end of the working machine frame 3, and a fixing tool (see FIG. 3) A fixing plate 36 having a through hole 35 for inserting the same is provided.
It is formed in a hollow shape with the other side opened. On the upper and lower sides of the bracket 30, a round pin hole 31 for inserting the center pin 7S and a long hole pin hole 32, 32 long in the front-rear direction for inserting the connecting pins 7, 7 are opened. I have.

Next, the structure of the holder 9 will be described with reference to FIG. The holder 9 has a U-shaped section formed by a front piece 9a, an upper piece 9b, and a lower piece 9c, and is slidably inserted into the hollow portion of the bracket 30 shown in FIG. And a screw hole (nut) on one end
A fixing plate 90 provided with the upper side 9b is provided.
In the center of the lower side 9c, a pin hole 91 having the same shape as the pin hole 21 shown in FIG. 3 is opened, and cam holes (rectangular fixed holes having a right-angled triangular shape with one side inclined) 92, 92 on both sides thereof. Are opened in the same direction and in the same shape.

The cam hole 92 has a slide allowance in which the holder 9 can move in the longitudinal direction in the bracket 30, and a pin hole having a cam surface 93 inclined backward and receding on the front surface opposite to the fixing direction indicated by the arrow. It is formed so that it becomes. Next, the fixture 8 will be described with reference to FIG. The fixing device 8 includes a screw portion 80 and a handle portion 81 provided at right angles to the screw portion 80.
Is screwed into the screw hole 90a of the holder 9 through the through hole 35, and by turning the handle portion 81, the holder 9 is moved in the fixing direction indicated by the solid arrow and the fixing releasing direction indicated by the dotted arrow.
Is moved horizontally.

Next, the manner of use of the working machine connecting structure of the traveling working machine configured as described above will be described. As shown in FIG. 3, the bracket 30 with the holder 9 fitted therein is fitted into the hitch 20 when the work machine is attached to the traveling work machine. Then, the connection pins 7, 7 pass through the left and right pin holes 22 of the hitch 20, the pin holes 32 of the bracket 30, and the cam holes 92 of the fixture 9. Then, by tightening and rotating the fixing tool 8, it is possible to easily and firmly connect a working machine such as a cultivator to the traveling working machine 1 without rattling or the like.

That is, when the fixing tool 8 is turned in the tightening direction, the holder 9 advances in the direction of the solid line arrow, and the left and right upper and lower cam surfaces 93, 93 provided on the holder 9 are wedge-shaped on the left and right connecting pins 7, 7, respectively. The bracket 30 is pushed forward, and the front surface of the bracket 30 is hitch 20 through a long hole-like pin hole 32.
And the holder 9 is connected to the connecting pin 7.
Is firmly engaged and fixed.

Therefore, the upper side 9b and the lower side 9c of the holder 9 are securely joined and supported to the bracket 30 by the hitch 20 against the load and vibration in the vertical and horizontal directions of the working machine during the tilling operation. Thus, a good operation can be performed for a long time without rattling between the hitch 20 and the bracket 30. Further, since the holder 9 is manufactured by sheet metal instead of being manufactured by casting as in the conventional case, it is possible to reduce the weight of the connecting structure and to improve the ease of handling, and to reduce the cost. is there.

[0015]

As is apparent from the above description, the working machine connecting structure of the traveling working machine has a structure in which the bracket 30 of the working machine 6 is attached to the hitch 20 of the traveling machine body 1 with the connecting pins 7, 7, and the fixing tool 9 is used. A holder 9 having cam holes 92, 92 formed on the left and right sides of the upper side 9b and the lower side 9c, through which the connecting pins 7 are inserted, is slid in the bracket 30 by the fixture 8 to be connected. Therefore, the working machine 6 can be attached to the traveling machine body 1 in a stable posture without rattling.

Therefore, it is possible to perform good work by the work machine 1, to reduce the weight of the connecting structure and to improve the handleability, and to manufacture it at low cost.

[Brief description of the drawings]

FIG. 1 is a side view showing a state where a Taylor-type traveling machine and a working machine are connected.

FIG. 2 is a plan view of a working machine frame.

FIG. 3 is a plan view of a connection structure.

FIG. 4A is a plan view of a bracket, and FIG.
FIG.

5A is a plan view of a holder, and FIG. 5B is a side view of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Traveling machine body (traveling work machine) 2 This machine frame 3 Work machine frame 6 Tillage device (working machine) 7 Connecting pin 8 Fixing tool 9 Holder 9b Upper side 9c Lower side 92 Cam hole

Claims (1)

[Claims] 1. In a state in which a hollow bracket 30 provided on a working machine frame 3 is fitted into a hitch 20 having a U-shaped cross section, a left and right connecting pin 7
In the working machine connecting structure in which the working machine 6 is detachably connected to the traveling machine body 1, the holder 9 having the upper side 6 b and the lower side 9 c is slid into the bracket 30 by operating the fixture 8. The bracket 30 is provided so as to be fixable, penetrates the connecting pin 7 through the upper side 9b and the lower side 9c, and slides by the fixing operation of the fixing tool 8 along the bracket 7 along the connecting pin 7.
A working machine connecting structure of a traveling working machine, wherein a cam hole 92 for pressing the front surface of the vehicle to the hitch 20 is formed.