JPS6347930Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a rod lock mechanism for agricultural machinery.

(B) Prior Art Conventionally, in agricultural machines, the axial position of the connecting rod has been locked by fastening bolts or nuts, or by inserting and removing lock pins.

(c) Problems to be solved by the invention Therefore, there were disadvantages in that tools such as spanners were required to adjust the position of the rod, and it took time to prevent the pins from falling out.

(d) Means for solving the problem In this invention, a number of engagement grooves are formed on the outer circumferential surface of the rod through which the fixing plate is inserted, and in the grooves and a locking plate that overlaps the fixing plate, approximately U is formed. The rod is locked by mutual engagement with the letter-shaped notch, and the mutual engagement is achieved by rotation of the locking plate around the handle shaft inserted through the locking plate and the fixing plate. The handle shaft is folded back into a substantially U-shape in order to fix and rotate the locking plate, and the tip of the folded portion is inserted into a locking hole drilled in both the locking plate and the fixed plate. The present invention provides a rod locking mechanism for an agricultural working machine which facilitates the position adjustment and fixing work of the rod by configuring the locking plate to be fixed by the locking plate.

(E) Operation Therefore, when adjusting and locking the rod, the operator must grasp the folded part of the handle shaft, slide the same shaft in the pulling direction, remove the tip of the folded part from the fixing plate locking hole, and then The rod can be unlocked by rotating the coaxial shaft, and after adjusting the rod position, the rod can be locked by reversing the above procedure. In particular, the locking of the rod is made more reliable by locking the locking plate that locks the rod at the tip of the folded portion that passes through the locking plate and the fixing plate.

(f) Effects According to this invention, since the rod locking mechanism of the agricultural machine is configured as described above, the position of the rod can be adjusted and fixed with simple and easy operations without the need for any tools. This has the effect of ensuring locking.

(G) Example The example of the present invention will be explained in detail based on the drawings.
A shows an agricultural tractor, in which a prime mover section 2 is disposed on the upper surface of a frame 1 disposed at the front.
The power is transmitted to the rear transmission case 3, which drives the rear wheels 4 disposed on the left and right sides of the case 3, and also steers the front wheels 6 with a steering wheel 5 disposed in the center of the fuselage. It is configured to allow tractor A to travel.

The tiller B at the rear of the tractor A is connected to a hitch 8 protruding from the rear surface of the transmission case 3, and the tilling part B protrudes rearward from the center of the hitch 8.
The power from the PTO shaft 9 is transmitted to the horizontal shaft 11 horizontally suspended at the rear end of the connecting part 10, and is transmitted to the tilling shaft 13 horizontally suspended at the lower end of the case 12 via the chain case 12 vertically installed on the left end of the horizontal shaft 11. It is configured to perform tilling work by rotating a large number of tilling claws 14, and a tilling cover 15 covers the top of the tilling claws 14.
A front end 17-1 of a leveling plate 17 is rotatably attached to a rear end 15-1 of the cover 15 via a hinge 16.

Further, the base end of a leveling plate support rod 18 is fixed to the upper surface of the tillage cover 15, and the tip 18-1 of the support rod 18 extends rearward above the tillage cover 15. 1 is provided with a locking mechanism C, and a rod 20 is interposed between the mechanism C and a bracket 19 provided in the middle of the leveling plate 17, and the rod 20 is freed or locked by the locking mechanism C. By doing so, the position of the leveling plate 17 is adjusted and fixed.

In the lock mechanism C, a plate-shaped fixing plate 21 is connected to the same plate 2.
1 Left and right swing shafts 22, 2 protruding from the left and right edges of the base end
2', it is pivotally supported inside a fork formed at the tip 18-1 of the flat plate support rod, and a rod insertion hole 22 is bored in the base end of the plate 21.
A rod 20 is inserted into the hole 22 so as to be slidable up and down, and a large number of locking grooves 23 are formed on the outer peripheral surface 20-1 of the rod 20. On the other hand, a substantially oval-shaped locking plate 24 is superimposed on the upper surface 21-1 of the fixed plate 21, and a substantially U-shaped notch is formed inward from the left edge of the plate 24. Part 24-1
is provided, and the notch 24-1 and the rod 2
Due to mutual engagement with the locking groove 23 of 0, the rod 20
It is configured to lock the Furthermore, the locking plate 24 and the fixing plate 2 are located at the rear position of the notch 24-1.
1, the base end 25-1 of the handle shaft 25 is inserted through the handle shaft 25 so as to be vertically slidable and rotatable, and the locking plate 24 is rotatable about the same shaft 25 with respect to the fixed plate 21.

The upper part of the handle shaft 25 is folded back into a substantially inverted U-shape, and the tip 25-3 is inserted into locking holes 24-2 and 21-2 that are commonly drilled in the locking plate 24 and the fixing plate 21. Rotation of the locking plate 24 is locked.

Handle shaft base end 25-1 and coaxial tip 25-3
are connected to each other by a substantially oval-shaped connecting plate 26, and downward sliding of the handle shaft 25 is prevented by contact between the plate 26 and the upper surface of the locking plate 24.

The handle shaft base end 25-1 extends 25-4 further below the lower surface of the fixed plate 21, and the extending portion 25-4 includes a coil for biasing the handle shaft 25 downward. A spring 27 is provided, and the spring 27 slides the handle shaft 25 upward so that the tip 25-3 of the same shaft touches the fixed plate 2.
When the spring 27 is pulled out from the locking hole 21-2 of No. 1 and the locking plate 24 is in the position inside the locking hole 24-2, the spring 27 is in the tight state t and the tip 25-3 is removed from the locking hole 21-2. Configured to prevent upward sliding.

In the figure, 28 indicates a retaining ring for attaching the coil spring 27 to the handle shaft 25.

Therefore, the operator must press the folded portion 2 of the handle shaft 25.
5-2 and lift the coax 25 until upward sliding is prevented by the close contact t of the coil spring 27, and then turn the coax 25 clockwise. Since the plate 24 is inserted into the locking hole 24-2, the plate 24 rotates clockwise together with the handle shaft 25, and the notch 24 of the locking plate 24 rotates to the right.
-1 and the locking groove 23 of the rod 20 is released, the vertical sliding movement of the rod 20 becomes free, and the vertical position of the rod 20 can be adjusted. The rod 20 is locked by the reverse procedure to adjust and fix the vertical position of the leveling plate 17.

The rod locking mechanism of the present invention can be applied not only to the vertical position adjustment of the leveling plate of the embodiment, but also to any agricultural machine that requires axial position adjustment and locking of the rod.

[Brief explanation of the drawing]

Figure 1 is an overall side view of a tractor as an agricultural working machine having a rod lock mechanism according to the present invention;
The figure is a plan view of the same essential parts, and FIG. 3 is a sectional view of FIG. 2. 20: Rod, 20-1: Outer peripheral surface, 21: Fixing plate, 21-2: Locking hole, 22: Rod insertion hole, 23: Locking groove, 24: Locking plate, 24-1: Notch part, 24-2: the same locking hole, 25: the handle shaft, 25-1: the same base end, 25-3: the same distal end.

Claims (1)

[Scope of utility model registration request] Outer peripheral surface 20 of the rod 20 inserted into the fixing plate 21
A large number of locking grooves 23 are formed in -1, and the locking plate 24 is overlapped with the fixing plate 21, and one side of the handle shaft 25, which is approximately inverted U-shaped, is attached to the ends of the overlapping fixing plate 21 and the locking plate 24. The proximal end 25-1, which is the shaft end of the handle shaft 25, is inserted through the base end 25-1 so as to be freely raised and lowered, and the locking plate 24 is configured to be rotatable with the base end 25-1 as the axis. Tip 25- which is the other shaft end
3 can be freely inserted and removed by lifting and lowering the handle shaft 25 into locking holes 21-2 and 24-2 that are bored in common with the fixing plate 21 and the locking plate 24, and the locking plate The handle shaft 2 is attached to the tip edge of 24.
The tip 25-3 of 5 is connected to each locking hole 21-2 and 24-
When the rod 20 is inserted into the locking groove 23 of the rod 20,
A rod lock mechanism for an agricultural working machine, which is formed with a notch 24-1 that can be freely engaged with.