JPH0642411Y2 - Work equipment coupling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a working machine connecting device for connecting a ground working machine such as a rotary tiller to a power agricultural machine such as a tractor.

[Prior Art] Conventionally, as an apparatus of this type, although not shown, a rear-sided triangular hitch is attached to the rear of the tractor via a three-point link mechanism, and the rear end of the universal joint is supported on this hitch. Also, the triangular hitch is fixed to the part facing the rotary tiller side, and the triangular hitch on the tractor side is scooped up from below against the triangular hitch on the rotary tiller side while matching the fitting parts of each hitch. Then, the two are united together, and after that, the rear end of the universal joint whose front end is inserted into the PTO shaft of the tractor and the input shaft of the rotary cultivator are connected to each other so as to perform matching work. It was

[Problems to be solved by the invention] However, in such a conventional device, the operator must get off the cockpit and insert the universal joint between the PTO shaft and the input shaft on the rotary side after connecting the tractor and the rotary tiller. Therefore, it is difficult to connect the hitches to each other and to connect the power transmission devices at the same time, easily and quickly.

[Means for Solving Problems] The present invention is proposed in view of the problems described above, and the connection between the tractor and the working machine and the docking between the universal joint and the rotary side input shaft are almost simultaneously performed. Moreover, it is an object of the present invention to provide a working machine coupling device that can be performed extremely easily.

Therefore, the following technical measures were taken. That is, a universal joint 25 is attached to the tractor-side hitch frame 8 that connects the tractor 1 and the rotary tiller 9 to each other.
A support frame 26 supporting the rear end of the universal joint 25 is provided so as to be movable back and forth by an operating lever 23 provided upright, and a claw that rotates integrally with a rotary-side input shaft 39 is provided at the rear end of the universal joint 25. A guide guide portion 36 into which the tip end portion of the clutch body 40 can be fitted, and a pawl 38 which is located on the outside in the radial direction and which engages with the pawl 45 of the guide body 40 guided by the guide are provided. Both claws between the support frames 26
A working machine coupling device is characterized in that an elastic tool (24) for urging in a direction in which 38, 45 are engaged is interposed.

[Embodiment and Action] An embodiment of the present invention will be described below with reference to the drawings.
First, the structure will be described. 1 is a tractor, 2 is a top link holder attached to the rear part of the body of the tractor 1, 3 is a top link, and 4 and 4 are lower links. The top link 3 and the pair of left and right lower links 4 and 4 constitute a three-point link mechanism 5, and the lower links 4 and 4 are connected by the lift arms 6 and 6 and the lift rods 7 and 7. When 6 rotates, lower link 4,
4 moves up and down. Reference numeral 8 denotes a triangular hitch for lifting the rotary tiller 9, which has a protrusion 10 formed at its upper end, and the triangular hitch 8 is detachably attached to the three-point link mechanism 5. The triangular hitch 8 is formed of a steel pipe having a square cross section, and has plate bodies 11, 11 facing forward in the center part on the front side.
And the parallel link mechanism 12, 12
The four link pieces constituting the above are attached. More specifically, a link 14 is pivotally attached to the plate 11 on the left side in the traveling direction by a pin 13, and a link 15 longer than the front link 14 is pivotally attached to the rear thereof by a pin 16. ing. On the other hand, the plate 11 on the right side has two equal-length links by pins 17 and 18.
19, 20 (the length is almost the same as the link 14) are pivotally attached, and the links 21, 21, which extend in the front-rear direction, are interposed at the lower ends of these links 14, 15, 19, 20, and the pins 22, 22 ... Link before and after 1
4, 15, 19 and 20 are connected. Since the distance from the pin 13 (17) on the front side to the pin 16 (18) on the rear side and the distance between the pins 22 and 22 are substantially equal to each other, these left and right link mechanisms function as a parallel link mechanism. Left rear link
An operation lever 23 is attached to the upper end of 15 by extending upward, and a tension spring 24 is connected between the pin 16 on the lever side and the pin 22 on the front side. The rear pins 22, 22 that connect the links 21, 21 and the links 16, 20 also connect and hold the support frame 26 that supports the rear end of the universal joint 25, as will be described later. When the lever 23 is tilted forward, the support frame 26 moves backward together with the biasing force of the spring 24, and when the operation lever 23 is moved backward, the support frame 26 moves forward. As is apparent from FIG. 2, the support frame 26 is capable of sliding in a predetermined range within a predetermined range in any direction with respect to the box-shaped first frame 27 whose outer peripheral edge is folded back horizontally. And a second frame 28 attached to the. Reference numeral 30 denotes a bolt for connecting the first frame 27 and the second frame 28, and a spring 31 is interposed between the head of the bolt 30 and the second frame 28. Second frame 28 bolt
A hole (not shown) having a diameter larger than that of the bolt 30 is bored in the portion where the 30 ... Is inserted, and the second frame 28 is the first frame.
It is configured so that it can slide slightly in any direction with respect to 27. Bearings 32, 32 are provided on the radially inner side of the second frame 28, and rotatably support the rear end of the universal joint 25. At the rear end portion of the universal joint 25, a claw clutch body 40 on the rotary tiller 9 side described later is provided.
Is provided with a guiding guide portion 36, and a tapered surface 37 having a diameter increasing toward the rear is formed at the rear end edge,
Three clutch pawls 38 are provided at equal intervals in the circumferential direction at the rear end portion. On the other hand, a pawl clutch body 40 as shown in FIG. 4 is attached to the input shaft 39 of the rotary tiller 9, and the pawl clutch body 40 has a retaining pin 41 formed in a screw hole 42 formed in the pawl clutch body 40. It is fixed to the input shaft 39 by inserting it from the lateral outside and screwing it. The claw clutch body 40 has a spigot part 44 with a tapered surface 43 that enters the guide guide part 36 from the rear side, and claws 45 that are radially outside the spigot part 44 and mesh with the clutch claw 38. When the claws 38 on the side of the joint 25 and the claws 45 on the rotary side are engaged with each other, the inlay part 44 first enters the guide part 36 so that the rotation axis is aligned, and then the claws 38 and 45 are engaged with each other. . Reference numeral 50 in the figure denotes a triangular hitch on the side of the rotary tiller 9, which is the tractor 1
The triangular hitch 8 on the side is used to connect the two by picking them up from below. More specifically, the triangular hitch 50 on the side of the rotary tiller 9 is made of a steel material having an L-shaped cross section with the front side and the inside open, and the tractor 1 is retracted to bring both the hitches 8 and 50 closer to each other. When the hitch 50 on the rotary side is picked up by the protrusion 10 of the triangular hitch 8, both hitches 8 and 50 are united. Then, the lock pin is inserted from the side so that these do not move and move in the front-rear direction and are fixed. 51 and 51 are lock levers for inserting and removing the lock pin. A lock plate 52 is fixed to the front side of the triangular hitch 8 on the tractor 1 side toward the front. An L-shaped locking groove 53 in a plan view is provided on the plate 52, and the operation lever 23 is provided in the groove 53. Is inserted. The structure of the rotary cultivator 9 will be briefly described. The rotary cultivator 9 is a gear case 55 that hangs the input shaft 39, and a mast 56 that is disposed on the upper surface of the gear case 55 and supports the rear surface of the triangular hitch 50. , A cultivating shaft 57 mounted on the lower part of the gear case 55, a cultivating claw 58 planted on the cultivating shaft 57, a main cover 59 covering the upper part of the cultivating part, a rear cover 60 pivotally attached to the rear part of the main cover 59, etc. Consists of.

Next, the operation of the above example will be described. When the triangular hitch 50 on the rotary cultivator 9 side is hooked from below by the triangular hitch 8 on the tractor 1 side to lift it, first, the operating lever 23 attached to the hitch 8 on the tractor 1 side 23
Is tilted rearward to engage the arm of the lever 23 with the locking groove 53 on the rear side, and the support frame 26 supporting the rear end of the universal joint 25 is moved forward. In this state, the tractor 1 is retracted so that the triangular hitch 8 on the tractor 1 side is closer than the triangular hitch 50 on the rotary tiller 9 side, and the lift arms 6 and 6 are rotated upward to move the same. I'm scooping. Then, after the two are united, the lock lever
Operate 51 to fix both hitches 8 and 50 so they do not come off.
Next, the arm of the operation lever 23 is moved from the short rear side engagement groove 53 to the long engagement groove 53, and the support frame 26 supporting the rear end of the universal joint 25 is retracted. Then, the guide guide portion 36 formed at the rear end of the universal joint 25 on the side of the tractor 1 comes into contact with the tip of the pawl clutch body 40 on the side of the rotary cultivator 9, and the spigot portion 44 is formed before the pawls 38 and 45 engage with each other. The claws 38, 45 enter into the guide portion 36 and serve to align the rotating shafts of the claws 38, 45. When the tip portions of the claws 38 and 45 are not in contact with each other and are not meshed with each other, the PTO shaft may be rotated in this state to temporarily transmit the rotational power. As described above, when the device according to this embodiment is used, the rotary tiller 9 is attached to the tractor 1.
After being lifted by the side triangular hitch 8, the support frame 26 supporting the universal joint 25 is simply retracted by simply moving the operation lever 23 forward, and the claws are easily meshed with each other to quickly perform the work machine connection work. be able to. Moreover,
Since the spring 24 interposed in the parallel link mechanism 12 always applies a backward biasing force, the clutch pawls 38 and 45 do not come off during the work. Further, since the support frame 26 is supported by the parallel link mechanism 12 so as to be movable back and forth, an excessive load is not applied to the clutch pawls 38 and 45 when the clutch pawls 38 and 45 are attached and detached, and the clutch pawls 38 and 45 are prevented from being damaged. be able to.

[Advantages of the Invention] Since the present invention is configured as described above, it has the following technical effects.

That is, after connecting the rotary tiller 9 with the hitch frame 8, the operating lever 23 is operated in the front-rear direction while the tractor 1 is still on, and the guide guide 36 of the universal joint 25 is operated.
By inserting the tip of the claw clutch body 40 on the rotary tiller 9 side into the above, the rotational axes of the clutch claws 38 and 45 can easily coincide with each other. In this case, since the operation lever 23 is provided on the side of the hitch frame 8 close to the operator, the operator's hand can easily reach it, and the operation of moving the support frame 26 back and forth by the lever 23 becomes easy.

Then, after the rotational axes of both the clutch pawls 38, 45 are aligned, the support frame 26 is pulled rearward by the urging force of the elastic tool 24, so that the both clutch pawls 38, 45 are surely engaged with each other. Since this biasing force also acts inside, the clutch pawl
The mesh of 38 and 45 does not come out.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is an overall side view, FIG. 2 is a sectional view of an essential part, and FIGS. 3 and 4 are perspective views of the essential part.
FIG. 5 is a plan view of the main part. Explanation of code 1 …… Tractor 5 …… 3-point link mechanism 8 …… Hitch frame (triangular hitch) 9 …… Rotary tiller 12 …… Parallel link mechanism 23 …… Operating lever 24 …… Spring 26 …… Support frame

Claims (1)

[Scope of utility model registration request] 1. A tractor side hitch frame 8 connecting the tractor 1 and the rotary tiller 9 to each other can be moved back and forth by an operating lever 23 provided with a support frame 26 for supporting the rear end of the universal joint 25 standing upright. Installed in
At the rear end portion of the universal joint 25, a guide guide portion 36 into which a tip portion of a pawl clutch body 40 that rotates integrally with a rotary-side input shaft 39 can be fitted, and a guide guide portion 36 that is radially outside thereof and is guided and guided. Claw 38 of claw clutch body 40
Is provided, and the hitch frame 8 side and the support frame 26 are provided.
An elastic tool that urges both claws 38 and 45 in the direction in which they interlock.
A work machine connecting device characterized in that 24 is interposed.