JPH0333203Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to a work implement coupling device for a tractor, for connecting a work implement such as a front mower, front rake, disc mower, etc. to a tractor, particularly a tailor. It is something.

(Prior Art) As a coupling device for attaching a working machine such as a front mower to a conventional hand tractor such as a Taylor, there is a coupling device as shown in Fig. 4 (for example, the Gutbrod moter
(See MF70, 72 catalog).

In this device, a mower 48 is attached to a tailor-side housing 42 provided at a mission 41 portion at the end of the tailor (only the position of the body is indicated by reference numeral 40).
While inserting the side housing 49, the output shaft 47
After engaging the input shaft 50 having the same cross-sectional shape with the rectangular hole 46 of the mower side housing 49, the mower side housing 49 is fixed and attached to the Taylor side housing 42.

Further, in Japanese Utility Model Application Publication No. 52-55812, a hitch part B for attaching a work machine, etc. is provided at the rear of a transmission case on which wheels are mounted, and the rear part of the cylinder metal of the hit part,
The joint plate at the end of the case on the rotary (working machine) side is rotatably attached to the joint plate by a support plate and a positioning pin, and both are detachably fixed by a coupling device, and the inside of the cylindrical metal In this working machine connection structure, the engaging pin of the engaging tool (near the left end of the engaging part in Figures 2 and 6 in the same publication) is described. By engaging the hook part of the rotatable engaging tool, the engaging tool is engaged, and the engaging tool is rotated counterclockwise against its spring. (Figures 2, 4, 6, and 7 of the same) to release the engagement with the engaging metal and allow the rotary case (working machine) to rotate relative to the positioning pin. There is.

Further, in Japanese Utility Model Publication No. 50-5771, a hollow projecting body projecting from a mobile agricultural machinery frame is constituted by a large diameter cylindrical part, a small diameter cylindrical part, and an inclined part connecting the cylindrical part, A locking tool is provided on the hollow protrusion, which protrudes from the working machine side, fits a cylinder having an inner surface shape that fits into the protrusion, and secures the fitted state between the protrusion and the cylinder. It is written about this.

(Problem to be Solved by the Invention) However, in the coupling device for attaching a front mower to a tractor, especially a hand tractor, as shown in FIG. 4, the weight of the front mower is large. Another problem is that alignment of the output shaft 47, the housing 49 on the mower 48 side, and the input shaft 50 is troublesome, and the assembly requires a lot of time and effort.

Further, the positioning pin of the above-mentioned Japanese Utility Model Publication No. 52-55812 is provided above the PTO shaft, and
This positioning pin is not only orthogonal to the PTO axis, but also shown in Figure 3 (plan view) and Figure 8 (same) of the same publication.
As is clear from the relationship between and Figures 2 and 6,
This positioning pin is supported by a complex structure in which it is supported in semicircular recesses on both sides of the hit plate, and the rotary case described in this publication rotates around such a positioning pin. , and a pin that appears to protrude from the engagement tool as an engagement means with the engagement tool (see the hatching near the left end of the engagement section in Figures 2 and 6 in the same publication). The circle mark) is also perpendicular to the PTO axis and is provided in the same direction as the positioning pin, and since the pin of this engagement tool is provided below the PTO axis, it cannot be engaged with the positioning pin. The work machine is removed by releasing both engagements with the tool, which is cumbersome to operate.

Further, the device described in the above-mentioned Japanese Utility Model Publication No. 50-5771 positions the locking tool by engaging it with an engagement hole of a hollow protrusion provided in the tractor-side housing, and , this engagement pin rotates the cylindrical housing protruding from the transmission case 7 on the rotary (working machine) side, and engages an engagement tool installed on the mobile agricultural machine side in one of its through holes. This is intended to ensure engagement between the two, and although it can be expected to have a corresponding effect, it not only has a fairly complicated structure, but also is cumbersome to operate. does not even disclose the concept of operating the positioning pin and the engagement tool separately in order to position and tighten them separately.

This invention was made with attention to such problems, and includes providing positioning pins and tightening bolts that extend in the direction of the output shaft within the tractor-side housing above and below the flange portion of the end of the tractor-side housing. , a receiving hole for the positioning pin and a receiving groove for the tightening bolt are provided in the flange at the end of the housing on the work machine side, and a clutch with an elastic spring is provided at the end of the output shaft in both the housings, and the clutch is engaged with the clutch. The present invention aims to provide a working machine coupling device for a tractor that can solve the above-mentioned problems by providing a clutch at the end of the input shaft.

(Means for Solving the Problems) In order to solve the problems in the prior art as described above, this invention
A positioning pin 10 extending in the same direction as the output shaft 16 disposed inside the tractor side housing 8 is provided at the bottom of the end flange 9, and a positioning pin 10 extending in the same direction as the output shaft 16 disposed inside the tractor side housing 8 is provided at the upper part of the tractor side housing 8. A receiving groove 11 is provided, a tightening bolt 14 is rotatably attached to a shaft 13 on the side of the receiving groove 11, and a meshing clutch 19 with an elastic spring 20 is attached to an output shaft 16 provided in the tractor side housing 8. A receiving hole 25 for engaging the positioning pin 10 is provided in the lower part of the flange 24 of the working machine side housing 23 that engages with the flange 9 of the tractor side housing 8.
A receiving part 26 that engages with the tightening bolt 14 and opens upward is formed on the upper part of each of the parts 4, and a receiving part 26 that opens upwardly is formed on the upper part of the output shaft 16 at the end of the input shaft 27 provided in the working machine side housing 23. A dog clutch 30 that meshes with a dog clutch 19 is provided.

(Function) Since the present invention has the above-described configuration, when connecting a working machine such as a front mower, front rake 21, or disc mower to a tractor such as Taylor 1, the working machine side housing 8 is connected to the tractor side housing 8. 23, and first insert the positioning pin 10 into the flange 2 of the working machine side housing 23.
4 into the receiving hole 25 at the lower part, and install it while regulating the relative positions of the two, and then rotate the tightening bolt 14 clockwise in plan view to insert it into the receiving groove of the flange 24 of the work equipment side housing 23. 26 for connection and fixation, and after loosening the tightening bolt 14 and rotating it counterclockwise in plan view, the working machine side housing 23 is pulled out from the tractor side housing 8 and the two are separated.

(Example) Fig. 1 is a plan view of an embodiment of this invention in which a front mower is attached to a tailor, Fig. 2 is an enlarged plan sectional view of the main parts, and Fig. 3 is a cross section taken along the line of Fig. 2. It is a diagram.

In Figures 1 to 3, 1 is a Taylor supporting the fuselage 2 by tires 3, 4 is a handle, 5 is an engine on the fuselage 2, 6 is a transmission mechanism, 7 is a transmission, 8 is a housing on the Taylor side, and 9 is a A positioning pin 10 is provided protrudingly on the right side of the flange at the right end of the housing 8. Reference numeral 11 denotes a groove provided on the right side of the flange 9, through which a tightening bolt 14, which will be described later, passes. 12 is a projecting wall provided on the left side of the flange 9 on the left side of the housing 8; 13 is a support shaft of a tightening bolt 14 whose base is rotatably supported on the projecting wall 12; 15 is a nut; 16 is an output shaft , 17 is a snap spring, 18 is a key, 19 is a meshing clutch slidably provided on the output shaft 16, 20 is a compression spring, 22 is a dividing plate of the mower 21, 23 is a mower (working machine) side housing, and 24 is a mower side housing. A flange provided at the center of the mower side housing 23, 25 a receiving hole, 26 a receiving groove, 27 an input shaft of the mower 21, 2
8 is a key, 29 is a snap ring, 30 is a mesh clutch, and 31 is a cutting blade.

Next, the operation of this embodiment will be explained.

First, in order to connect the mower (work machine) 21 to the tailor 1, when inserting the rear end of the mower side housing 23 into the tailor (tractor) side housing 8, insert the positioning pin 10 into the center of the work machine side housing 23. Mount the flange 24 into the receiving hole 25 on the right side while regulating the relative positions of the two, then insert the tightening bolt 14 into the groove 11 of the flange 9 and the receiving groove 26 of the flange 24, and then tighten the nut 15.
Tighten to connect both housings 8 and 23. Further, the tailor 1 and the mower 21 can be separated by loosening the nut 15, removing the tightening bolt 14 from the receiving groove 26, and pulling out the mower housing 23 from the tailor housing 8.

Although FIG. 1 shows an example in which a front mower 21 as a working machine is provided at the front of the tailor 1, this working machine may be a front rake or a disc mower. Furthermore, this coupling device is not limited to one in which a working machine is installed at the front of the tailor 1; for example, the output shaft (PTO shaft) is provided protruding toward the side of the tractor, and the working machine is connected to the side of the tractor. It can also be applied as is to mid-mount mowers configured to do so.

(Effects of the invention) This invention has the above-mentioned structure and functions, and in addition to having the same functions and effects as a coupling device on a normal tractor, it also has the following unique effects. can get.

(1) The tractor and work equipment can be attached and detached by tightening or loosening one tightening bolt 14.

(2) By simply inserting the positioning pin 10, which is provided on the flange 9 of the tractor-side housing 8 and extends in the same direction as the output shaft 16, into the receiving hole 25 of the flange 24 of the work equipment-side housing 23, the Taylor ( Since the normal mounting angle of the working machine 21 with respect to the tractor 1 is determined and the mounting condition is ensured, the working machine 21 can be easily mounted.

(3) One engaging clutch 19 is connected to the elastic spring 2.
0, even if the peaks of both dog clutches 19 and 30 come into contact with each other when the working machine 21 is installed, the compression side dog clutch 19 immediately retreats and the work machine 21 can be installed easily.

(4) Since the positioning pin 10 is provided below the output shaft 16 of the tractor side housing 8, and the tightening bolt 14 is provided above it so as to extend in the axial direction of the output shaft 16, it is possible to Even if the nut 15 becomes somewhat loose, the tightening bolt 14 will rotate clockwise around the support shaft 13 (FIG. 2) due to its own weight, and the flange 24 at the end of the work machine side housing 23 will rotate.
is lowered to the bottom side of the receiving groove 26 to ensure the engaged state, and therefore, the machine side housing 23
Unless rotation in the clockwise or counterclockwise direction (FIG. 2) around the flange 24 is prevented and the nut 15 does not loosen significantly, the mounting state of the work machine side housing 23 will be rapidly released and its There is no risk that the work equipment will fall accidentally.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of this invention, Fig. 2 is an enlarged plan sectional view of the main part, Fig. 3 is a sectional view taken along the line of Fig. 2, and Fig. 4 is a front view of a conventional tailor. It is a perspective view of the connection part of the connection device equipped with the mower. 1...Taylor (tractor), 7...Mission, 8...Taylor side housing, 9...Flange, 10...Positioning pin, 11...Groove, 14...
... Tightening bolt, 16 ... Output shaft, 19 ... Dog clutch, 20 ... Resilience spring, 21 ...
Mower (work equipment), 23...Mower side housing,
24...flange, 25...receiving hole, 26...receiving groove, 27...input shaft, 30...meshing clutch.

Claims (1)

[Scope of utility model registration request] A positioning pin 10 is provided at the lower part of the flange 9 at the end of the tractor-side housing 8 and extends in the same direction as the output shaft 16 disposed inside the tractor-side housing 8.
A receiving groove 11 is provided in the upper part of the tractor-side housing 8 in the same direction as the positioning pin 10, and a tightening bolt 14 is rotatably mounted on a shaft 13 on the side of the receiving groove 11. A meshing clutch 19 with an elastic spring 20 is slidably provided on the output shaft 16 provided in the side housing 8, while the flange 9 of the tractor side housing 8
The flange 2 of the work machine side housing 23 that engages with the
A receiving hole 25 that engages with the positioning pin 10 is provided at the lower part of the flange 4, and a receiving groove 26 that engages with the tightening bolt 14 and opens upwardly is provided at the upper part of the flange 24. A working machine coupling device for a tractor, characterized in that a dog clutch 30 is provided at an end of an input shaft 27 provided in a housing 23, the dog clutch 30 meshing with a dog clutch 19 on the output shaft 16.