JPH0965744A - Reel mower - Google Patents

Abstract

(57) [Abstract] [Problem] When changing and adjusting the clearance between the blade portions of the reel blade and the fixed blade, or when changing the cutting height of grass,
Make adjustment work easy. SOLUTION: A spiral reel blade is provided on a fixed blade so as to be adjustable in position change through a first adjusting screw mechanism 17,
In the first adjusting screw mechanism 17, a screw shaft 20 that rotates around its axis while restricting its movement in the axial direction is provided on either one of the reel blade and the fixed blade, and its male screw The portion 21 is screwed into the female screw portion 22 on the other fixed blade or reel blade side, and is engaged with the peripheral portion of the screw shaft 20 surrounded by the one reel blade or fixed blade at a constant pitch in the circumferential direction. And the engaging body 24 that engages with the engaging recess 23 is provided on one reel blade or the fixed blade side.
It is provided so as to be able to move back and forth toward the engagement recess 23 side through 5,
The screw shaft 20 is configured so that it can be rotated by a constant pitch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reel blade provided with a spiral reel blade, the position of which is adjustable by a first adjusting screw mechanism with respect to a fixed blade for scissor cutting with the reel blade. The reel mower is configured so that the clearance between the blade portions of the fixed blade and the fixed blade can be changed and adjusted.

2. Description of the Related Art Conventionally, in the above reel mower, in order to configure the first adjusting screw mechanism, one of the reel blade and the fixed blade is restricted from moving in the axial direction in the axial direction. A screw shaft that rotates around is provided, and the male screw portion is simply screwed to the female screw portion on the fixed blade or reel blade side on the other side.

Further, a roller for supporting the reel blade and the supporting frame for the fixed blade is provided so that the position can be adjusted in the height direction through a second adjusting screw mechanism so that the cutting height of the lawn can be changed. In this configuration, in the configuration of the second adjusting screw mechanism, one of the roller and the support frame rotates around the axis while the movement in the axis direction is restricted. Only the screw shaft is provided and the male screw portion is screwed to the other supporting frame or the female screw portion on the roller side.

[0003]

According to the above-mentioned conventional structure, since the first and second adjusting screw mechanisms are configured as described above, the clearance between the blade portions of the reel blade and the fixed blade is reduced. When changing or adjusting the cutting height of the lawn, it is difficult to grasp how much the clearance etc. has been changed by the rotation operation of the screw shaft, and it may not reach or exceed the target value, It took a long time to adjust.

An object of the present invention is to make it possible to easily perform the adjustment work when changing and adjusting the clearance between the blade portions of the reel blade and the fixed blade or when changing the cutting height of the lawn. Especially.

[0005]

[Means for Solving the Problems]

[Structure] In the reel mower described at the beginning, the characteristic structure of the invention according to claim 1 is that, in the reel mower described above, one of the reel blade and the fixed blade is arranged in the axial direction in the axial direction. Is provided with a screw shaft that rotates around its axis in a state in which movement of the reel blade is restricted, and its male screw portion is screwed into the other fixed blade or the female screw portion on the reel blade side, and the one reel blade or the fixed blade. An engaging recess is formed at a constant pitch in the circumferential direction on the peripheral portion of the screw shaft surrounded by, and an engaging body that engages with the engaging recess is provided on the one reel blade or the fixed blade side. The screw shaft is provided so as to be able to extend and retract toward the engaging recess side via a biasing means, and the screw shaft is configured to be rotatable by a constant pitch.

According to a second aspect of the present invention, in the reel mower described at the beginning, a roller supporting the spiral reel blade and the fixed blade supporting frame is provided.
A position is adjustable in the height direction through an adjusting screw mechanism so that the cutting height of the lawn can be changed, and the second adjusting screw mechanism is configured by either one of the roller and the support frame. On one side, a screw shaft that rotates around its axis in a state in which movement in the axial direction is restricted is provided, and its male screw portion is screwed to the other supporting frame or the female screw portion on the roller side, and Engagement recesses are formed at a constant pitch in the circumferential direction on the peripheral portion of the screw shaft that is surrounded by one roller or the support frame side, and engage with the engagement recesses on the one roller or support frame side. The engaging body to be provided is provided so as to be able to move back and forth toward the engaging recess side via the biasing means,
The screw shaft is configured to be rotatable at a constant pitch.

[Operation] According to the structure of claim 1, when the clearance between the blade portions of the reel blade and the fixed blade is changed and adjusted, the clearance is adjusted by rotating the screw shaft at a constant pitch. How much has been changed,
It can be grasped accurately based on the screw pitch, and can be easily set and adjusted to the target value. .

According to the structure of claim 2, when changing the cutting height of the grass, the cutting height of the grass is changed by rotating the screw shaft by a constant pitch in the same manner as described above. It is possible to accurately grasp whether or not it is based on the pitch of the screw, and it is possible to easily set and adjust the target value. .

[Effect] Therefore, according to the configuration of claim 1, when the clearance between the blade portions of the reel blade and the fixed blade is changed and adjusted, the adjustment work can be easily performed. According to the configuration of 2, the adjustment work can be similarly easily performed when changing the cutting height of the grass.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a riding type lawnmower.
This lawnmower is constructed by connecting a lawnmower 1 to a front portion of a riding type traveling body so as to be able to move up and down. The traveling machine body is provided with a boarding operation unit 2 in the front part of the machine body, a prime mover 3 in the rear part thereof, and a non-steering left and right front wheel 4 and a left and right steerable rear wheel 5 respectively driven to It is a wheel drive type.

The lawnmower 1 is, as shown in FIG.
One reel mower 9a is provided in the center part on the front side, and two reel mowers 9b, 9c are provided in parallel behind it and hydraulic motors 10a, 10b, 10 are provided respectively.
It is configured to be rotationally driven by c, and the whole is configured to be lifted and lowered by a first hydraulic cylinder (not shown).

As shown in FIGS. 3 and 4, in each reel mower 9a, 9b, 9c, a fixed blade 15 is integrally provided in the lower part of the reel case 8 (an example of a support frame) along the left and right,
The spiral reel blade 14 is supported by the left and right side walls 12 of the reel case 8 with its axis aligned with the fixed blade 15, and the blades are cut by the blades 14 and 15. In addition, a standing roller 32 for raising the fallen grass over the entire cutting width is supported on the front portion, and a cylindrical rear roller 33 is supported on the rear portion. The standing roller 32 and the rear roller 33 are installed across the left and right supports 36 fixed to the left and right side walls 12 of the reel case 8.

As shown in FIGS. 3 and 5, the reel blade 1
4, a pair of left and right brackets 7 that support both ends of the rotation support shaft 13 are supported by left and right side walls 12 of a reel case 8 so as to be vertically swingable around a rear shaft core P.
The first adjusting screw mechanism 1 is provided between the left and right first support shafts 16 which are continuously provided at the front end of the bracket 7 and the left and right outward second support shafts 19 which are fixed to the left and right side walls 12 of the reel case 8.
7 is provided so that the reel blade 14 can be positionally changed and adjusted with respect to the fixed blade 15, so that the reel blade 14 and the fixed blade 15 can be adjusted.
It is configured such that the clearance between the blade portions 14a and 15a can be changed and adjusted.

The first support shaft 16 is formed with male screw portions 16a at its left and right inner ends and is inserted into the long holes 26 formed in the left and right side walls 12 of the reel case 8 to prevent the washer from coming off. A W and a nut N are externally fitted and screwed, and are supported by the left and right side walls 12 so as to be vertically slidable.

The first adjusting screw mechanism 17 will be described. As shown in FIGS. 5 and 6, a stepped vertical hole 40 formed in the second support shaft 19 is provided with a screw shaft 20 having a knob and a base thereof. The flange 20a, which is rotatably inserted near the end side, and which restricts the movement of the screw shaft 20 in the axial direction, the washer W and the nut N, sandwich the second support shaft 19, and the screw shaft 20.
, And the male screw portion 21 is screwed into the female screw portion 22 formed on the first support shaft 16. Then, a spline having 20 teeth is formed on the peripheral portion of the screw shaft 20 in the stepped hole 40 to form an engaging recess 23 having a constant circumferential pitch at each valley of the spline, and at the same time, the second support shaft is formed. A steel ball 24 (an example of an engaging body) that engages with the engaging recess 23 is provided in a lateral hole 41 formed in the spring 19 and a spring 25.
(Example of biasing means) and seat 42, engaging recess 23
The screw shaft 20 is housed so that it can be retracted and retracted to the side, and the screw shaft 20 can be rotated by a constant pitch. The lateral hole 41 is closed by a bolt 27, and the spring 27 is secured by the bolt 27.
The urging force of 5 can be changed and adjusted.

As shown in FIGS. 3 and 7, the upright roller 32 and the rear roller 33 are constructed so that they can be integrally moved up and down relative to the reel case 8. That is, the support tool 36 that supports the left and right ends of the rollers 32 and 33.
And the left and right support members 34 that support both ends of the rotation support shafts of the rollers 32 and 33, a second adjusting screw mechanism 18 is provided to vertically adjust the cutting height so that the cutting height can be changed. I am doing it.

The second adjusting screw mechanism 18 has substantially the same structure as the first adjusting screw mechanism 17, and briefly described, the second adjusting screw mechanism 18 has its stopper 43 restricted to move in the axial direction toward the support 36. A screw shaft 29 with a knob that rotates around the shaft center is provided, and a male screw portion 30 of the screw shaft 29 is screwed into a female screw portion 31 of a support member 34, and a peripheral portion of the screw shaft 29 surrounded by the support 36 is provided. Engagement recesses 35 at a constant pitch in the circumferential direction
And four steel balls 38 (an example of an engaging body) that engages with the engaging concave portion 35 are engaged with the lateral holes 44 in the support tool 36 via a spring 39 (an example of a biasing means). The screw shaft 29 is housed in the fitting recess 35 side so that it can be retracted and retracted, and the screw shaft 29 can be rotated at a constant pitch. Also in this structure, the lateral hole 44 is closed by the bolt 45, and the urging force of the spring 39 can be changed and adjusted by the bolt 45.

Incidentally, each reel mower 9a, 9b, 9
Explaining the support structure of c, FIG. 3, FIG.
As shown in (b), the front end portions of the left and right side walls 12 of the reel case 8 are attached to the pair of left and right support arms 47 provided at the projecting end portions of the T-shaped support member 46 in plan view extending forward from the machine frame side. It is hung and supported rotatably around the horizontal axis Q. Further, one end of the link member 48 is pivotally connected to the intermediate portion in the longitudinal direction of the support arm 47, and the other end is pivotally connected to the upper surface of the left and right side walls 12 via a long hole 48a.

With this configuration, while the reel case 8 can be swingably moved up and down about the horizontal axis Q in a certain range, the rear limit of the rear portion of the reel case 8 is fixed as shown in FIG. 8B. It is possible to prevent the rear portion from colliding with the supporting member 46 and the like and being damaged.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by this entry.

[Brief description of drawings]

FIG. 1 is an overall side view of a riding lawn mower.

FIG. 2 is an overall plan view of a riding lawn mower.

FIG. 3 is a side view of a reel mower.

FIG. 4 is a bottom view of the reel mower.

FIG. 5 is a vertical sectional front view of the first adjusting screw mechanism.

FIG. 6 is a cross-sectional plan view of a first adjusting screw mechanism.

FIG. 7 is a vertical sectional front view of a second adjusting screw mechanism.

FIG. 8 (a) Side view showing a reel mower support structure. (B) Side view showing a reel mower support structure.

[Explanation of symbols]

 8 Support Frame 14 Reel Blade 14a Blade 15 Fixed Blade 17 First Adjustment Screw Mechanism 18 Second Adjustment Screw Mechanism 20,29 Screw Shaft 21,30 Male Screw Part 22,31 Female Screw Part 23,35 Engagement Recess 24,38 Engagement Body 25,39 Biasing means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Matsuo Tachibana 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd.

Claims (2)

[Claims] 1. The position of a spiral reel blade (14) is adjustable with respect to a fixed blade (15) that performs scissor cutting with the reel blade (14) via a first adjusting screw mechanism (17). A reel mower configured to change and adjust a clearance between blade portions (14a) and (14b) of the reel blade (14) and the fixed blade (15), the first adjusting screw mechanism ( 17), one of the reel blade (14) and the fixed blade (15) is provided with
A screw shaft (20) is provided which rotates around the shaft center while restricting movement in the shaft center direction, and a male screw portion (21) thereof is provided.
Is screwed onto the other fixed blade (15) or the female screw portion (22) on the reel blade (14) side, and the screw shaft (which is surrounded by the one reel blade (14) or the fixed blade (15) ( 20) around the periphery of the engaging recesses (2
3) and the one reel blade (14)
Alternatively, the engaging body (24) that engages with the engaging recess (23) can be moved toward and away from the fixed blade (15) side toward the engaging recess (23) via the biasing means (25). And a screw shaft (20) which is provided at the rear of the reel mower so that the screw shaft (20) can be rotated at a constant pitch. 2. The position of a spiral reel blade (14) is adjustable by a first adjusting screw mechanism (17) with respect to a fixed blade (15) which performs scissor cutting with the reel blade (14). A reel mower configured to change and adjust a clearance between blade portions (14a) and (14b) of the reel blade (14) and the fixed blade (15), wherein the spiral reel blade ( 14) and rollers (32), (33) supporting the support frame (8) of the fixed blade (15)
To adjust the position in the height direction through the second adjusting screw mechanism (18) so that the cutting height of the lawn can be changed, and the second adjusting screw mechanism (18) is configured. A screw shaft (29) is provided on either one of the rollers (32) and (33) and the support frame (8), which rotates around the shaft center while restricting movement in the shaft center direction. , The male screw portion (30) is screwed to the other supporting frame (8) or the female screw portion (31) on the side of the rollers (32), (33), and the one roller (32), (33) or Engagement recesses (35) are formed on the peripheral portion of the screw shaft (29) surrounded by the support frame (8) at a constant circumferential pitch, and the one roller (32), (33) or An engagement body (38) that engages with the engagement recess (35) on the support frame (8) side. , Provided freely projecting and retracting toward the engagement recess (35) side through the biasing means (39), are constituted the screw shaft (29) to be constant pitch at a time rotating operation Rirumoa.