JPS6115695Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cutting blade lifting prevention device in a reciprocating mower having a cutting rod.

In a conventional mower of this type, as shown in the first diagram, a drive box body 2 is used to reciprocate the movable cutting blade 1 from side to side.
Since the grass dividing rod 4 was directly attached to the attachment part 3 extending to the rear of the grass field, when mowing in a grassland, a large amount of cut grass would cover the grass dividing rod 4 and the grass cover 5, causing the grass to be separated. The weight of the grass is applied to the grass rod 4 and is pushed downward D, so the box body 2 uses the X plane as a fulcrum.
Lift upwards. As a result, the movable cutting blade 1 fixed to the arm portion 6 of the box body 2 via the knife bar 7 with the bolt 7A floats upward D', thereby creating a gap C between it and the fixed cutting blade 8. As a result, it became impossible to cut the grass, causing problems such as leaving grass uncut.

The present invention solves the above-mentioned drawbacks and will be explained below based on an embodiment shown in the drawings.

A is the cutting blade lifting prevention device of the present invention. The configuration is such that the mower has a dividing rod 4 in which the movable cutting blade 1 reciprocates left and right on the fixed cutting blade 8.
A receiving plate 11 is provided upright at the front part of the swinging rod 9,
The diagonally rear portion of the drive box body 2 that drives the movable cutting blade is extended to form a connecting portion 2A, and the lower end of the weeding rod 4 is swingably pivoted to the connecting portion by a shaft 12 or the like.
The grass dividing rod is supported by the receiving plate at a position slightly above the lower end of the grass dividing rod. 3A is a base attached to the lower end of the above-mentioned weeding rod, 5 is a weeding cover stretched between the above-mentioned weeding stick and the swinging rod, and 6 is a base that extends forward of the above-mentioned drive box body 2, and extends to the left and right sides. The movable cutting blade 1 is attached to the arm portion 6 which is wide in the direction.
from below, sandwich it between the knife bars 7, and secure both left and right ends of the arm portion 6 with bolts 7A, and
The upper surface of the movable cutting blade 1 is fixed to an appropriate location of the cutter bar 8B with bolts 8C, and is configured to extend forward and be held by the holding surface 1B of the knife holding member 1A, and reciprocates from side to side. 10 is a support shaft supporting the swinging rod 9 on the frame F, and S is a drive device.

To explain the operation of the present invention together with its effects, the swinging rod 9 swings left and right around the support shaft 10 by the drive device S, and the swinging motion of the drive shaft 9A fixed with a bolt to the tip of the swinging rod 9 is , the drive box 2 is reciprocated from side to side via a pin 9B built into the drive box 2.
As a result, the movable cutting blades 1 provided in large numbers on the knife bar 7 reciprocate from side to side on the upper surface of the fixed cutting blade 8 to cut the grass. At this time, the weeding cover 5 fixed with bolts at the front and intermediate parts of the swinging rod 9 and the receiving plate 11 provided at the front part of the swinging rod 9 are integrated with the swinging rod 9. The grass cutting rod 4 swings left and right, and the grass cutting rod 4 reciprocates left and right together with the movable cutting blade 1, and the grass cut by the grass cutting rod 4 and grass cutting cover 5 is distributed to the left and right sides of the machine body. If a large amount of grass cut during this work falls down and covers the grass divider 4, the weight of the grass will cause the grass divider 4 to move downward (in the D direction) using the abutment between its base 3A and the receiving plate 11 as a fulcrum. As a result, the base 3A and the drive box body 2 are rotatably connected by the shaft 12, so that the shaft 12 is rotated in the counterclockwise direction U as shown in FIG.
As a result, the wide left and right arm portion 6 that can extend forward of the drive box body 2 presses the movable cutting blade 1 attached to the arm portion 6 downward (in the D direction). The front portion of the movable cutting blade 1 is always kept in close contact with the fixed cutting blade 8.

In addition, in this conventional machine, when the mowing rod 4 is pushed downward in the direction D due to the weight of the grass, the movable cutting blade 1 rises and creates the gap C, as described above. Due to the downward force of 4, excessive surface pressure is applied to the sliding surface X of the pin 9B and the mounting body 8A, causing wear of the parts of the sliding surface X of the pin 9B and the mounting body 8A, and in addition, overload. However, it has some disadvantages such as being expensive. On the other hand, the main proposal is
As shown in Figure 2, when the dividing rod 4 rotates in the D direction,
As mentioned above, since the drive box body 2 is subjected to the action of floating upward U, no surface pressure is applied to the sliding surface X, and therefore, there is no abnormal wear of the sliding parts as in conventional machines, and in addition, Since the base 3A and the receiving plate oscillate in a cooperative manner, the friction between the lower surface of the base 3A and the upper surface of the receiving plate 11 is minimal, and the reciprocating motion of the movable cutting blade 1 during mowing work with a large amount of grass. It also has secondary effects, such as the power required for this is significantly reduced compared to conventional machines.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway left side view of the main parts of a conventional mower, Figure 2 is a partially cutaway left side view of the proposed mower, and Figure 3 is a partially cutaway plan view of the same. be. A... Reaping floating prevention device, 1... Moving cutting blade,
2... Drive box body, 4... Grass splitting rod, 8... Fixed cutting blade, 9... Swinging rod, 11... Backing plate, 12... Shaft.

Claims (1)

[Scope of utility model registration request] In a mower having a dividing rod in which a movable cutting blade reciprocates left and right on a fixed cutting blade, a receiving plate is provided upright in the front part of the swinging rod, and the diagonally rear part of the drive box body that drives the moving cutting blade is installed. The lower end of the dividing rod is pivotally attached to the connecting portion by a shaft or the like, and the dividing rod is positioned slightly above the lower end of the dividing rod, and is connected to the receiving plate. A mower blade lifting prevention device characterized by being supported.