JP2005176647A - Traveling driving roller portion-supporting structure in lawn mower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To downsize a roller-supporting portion 5 for vertically adjustably supporting a travel driving roller portion 4 disposed behind the cutting portion 7 of a lawn mower, by disusing a member rearward projected from a roller 40, preventing a sharp angle and the exposure of an uneven portion, and reducing the number of parts. <P>SOLUTION: A left support 51 and a right support 52 are detachably connected to each other with a connection shaft 52 to form the roller support 50 of the roller-supporting portion 5, and the driving roller portion 4 is pivotally supported with the connection shaft 52. The one roller-overlapping portion of one of the supports is adjacently notched to form the support in the inside opened box-like shape involving the uneven portion. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a support structure for a driving roller for traveling, which is arranged laterally behind a cutting portion and adjusts in the vertical direction in a mower.

  Conventionally, the driving drive roller support structure that also serves as a pressure suppressor is a fulcrum shaft that is arranged on the left and right sides of the casing, with the drive roller at the center and both ends of the core shaft protruding left and right with the power receiver fixed to one side. A structure in which the left and right support bodies rotatably mounted are installed via bearings, and the support body is generally a plate-shaped molded product that is partially bent.

As these technologies, one of the fulcrum shafts arranged on the left and right sides of the casing (left side in the embodiment) is a fulcrum hole of a belt-like adjustment lever, and a plate-like support that is partly bent while maintaining engagement with the adjustment lever. The left fulcrum hole is rotatably fitted, and on the other side, a partially bent plate support is fitted to the right fulcrum hole. A gate-shaped member is constructed by firmly connecting with a pipe passing through the proximity part, and both ends of the roller core shaft to which the sprocket receiving power is fixed on the left side is fastened and fixed to the inside of the gate-shaped member via a bearing to form a torii-like shape This is a structure in which this is fitted into and removed from the recessed portion of the fixed latch by an adjustment lever, and smooth covers are arranged on both outer sides of the gate-shaped member (see, for example, Patent Document 1).
Etc. are known techniques.

Japanese Patent No. 3195204

  In the above-mentioned known technology, since the roller is arranged inside the gate-shaped member, there is a projection near the ground surface behind the roller, and when the mowing work along the structure or the direction of the aircraft is changed, the ground surface is changed. The problem of causing deep scratches by touching the structure and the structure of the support is composed of plate-like members on both the left and right sides, and irregularities and sharp corners are generated in various places. It is necessary to provide a smooth cover with a smooth shape on both sides, and there are problems such as an increase in the number of parts and an increase in the length of the drive roller support.

The problem to be solved by the present invention is as described above. Next, technical means for solving this problem will be described.
That is, in claim 1, the driving roller unit 4 for traveling that also serves as a pressure suppressor is disposed laterally at a rear proximity portion of the cutting unit 7 in which the cutting surface is arranged substantially parallel to the ground surface, and the position of the driving roller unit 4 is determined. In a mower that adjusts the cutting height by supporting the cutting surface so as to be movable up and down, a roller support 50 that supports the drive roller unit 4 is connected between a support left 51 and a support right 52. The shaft 52d is detachably connected, and the drive roller portion 4 is fitted and supported by the connecting shaft 52d as a means.

  Further, in claim 2, the pair of left and right fulcrum shafts 56L and 56R are rotatably mounted on the rear part of the casing 6 in the shape of the lower opening box that houses the cutting part 7 whose cutting surface is arranged substantially parallel to the ground surface. The driving roller unit 4 for traveling that also serves as a pressure suppressor is supported horizontally by the roller support body 50, and the cutting height is adjusted by supporting the position of the driving roller unit 4 so as to be pivotable up and down with respect to the cut surface. In the mower, one support body that is engaged with an adjustment lever 55 that adjusts the cutting height and that constitutes the roller support body 50 has a seat that is attached to one fulcrum shaft and a connecting shaft 52d in a side view. As a means, it has a circular arc close to the adjustment latch 54 centered on one seat and the one of the fulcrum shafts, and an inner opening box shape in which a portion overlapping with one roller is cut close. It was.

  Further, according to the third aspect of the present invention, the one support member constituting the roller support member 50 is engaged with one end of the balance spring 59 and has an inner opening box shape for accommodating the balance spring 59 in a side view. Used as.

Since the present invention is configured as described above, the following effects can be obtained.
In other words, as described in claim 1, the roller support that supports the driving roller portion is configured by detachably connecting a connecting shaft between the left support and the right support, and the driving roller portion is configured by the connecting shaft. When the roller support is secured, the strength of the roller support is secured, the length of the drive roller support is shortened, and there are no protrusions behind the roller, so that mowing work near the structure or changing the orientation of the machine The effect which prevents the problem which contacts a ground surface and a structure, etc., and is deeply damaged is acquired.

  According to a second aspect of the present invention, there is provided a seat which is engaged with an adjustment lever for adjusting a cutting height, and one of the support members constituting the roller support is attached to one of the fulcrum shafts in a side view. And an inner opening box shape having a circular arc close to an adjustment latch centered on one fulcrum shaft and a seat where the connecting shaft is fixed, and a portion overlapping with one roller is cut close to While ensuring the strength of one of the supports and serving as a robust cover, the sharp edges of the support and the adjustment latch itself are prevented from being exposed, and both outer sides are adjusted to a smooth shape. The effect of preventing the accumulation of cut leaves on the fulcrum and the pressure deposit of cut leaves on the end of the roller can be obtained.

  Further, according to the third aspect of the present invention, since one of the support members constituting the roller support body is engaged with one end of the balance spring and has an inner opening box shape that accommodates the balance spring in a side view, The sharp projecting portion of the spring is included to prevent the performance of the spring from being deteriorated due to adhesion of dust such as cut leaves, and further, the effect that the engaging portion is easily provided without adding any parts can be obtained.

Next, embodiments and embodiments of the present invention will be described with reference to the accompanying drawings.
1 is an overall left side view of a mower incorporating the present invention, FIG. 2 is also an overall plan view, FIG. 3 is an essential part left side view, FIG. 4 is also a right side view, and FIG. FIG. 6 is a cross-sectional view taken along line BB.

First, the overall configuration of a mower incorporating the present invention will be described with reference to FIGS.
The overall configuration of the mower is linked to the traveling vehicle body 1 that mounts a power source, cuts the grass to a predetermined height, and discharges the cut leaves when viewed from the left side with respect to the traveling direction. An operation lever is arranged to discontinue power and change the advancing direction of the aircraft. The control unit 2 is arranged at the rear upper side so as to be adjustable, and cut leaves discharged from the discharge port 68 at the rear of the traveling vehicle body 1 are arranged. The grass collecting part 8 to be stored is detachably arranged on the rear side.

The steering unit 2 adjusts the rotation by engaging the handle attachment bodies 28L and 28R fastened and fixed on both upper sides of the rear portion of the casing body 61 with the tip portion of the loop-shaped handle 21 and the protrusions fixed behind the handle 21. The front end portion is fastened and fixed. The accelerator lever 23 is synchronized with the speed control lever of the engine 10, the travel lever 25 is the clutch arm 18, the work clutch lever 26 is the clutch 70, and each is connected by a cable lead wire. It is a structure that interlocks and connects.
The travel lever 25 and the work clutch lever 26 use a deadman system that returns to the “OFF” position when the operator releases the hand.

  Further, the grass collecting portion 8 has a grass collecting frame 81c sewed with a grass collecting bag 81 made of a breathable cloth excluding the handle and the hook portion, and is attached to the rear end surface of the casing body 61 provided with the discharge port 68. The structure is abutting, and the hook portion is attached to the projection at the rear end upper portion of the casing body 61, so that it can be easily attached and detached by grasping the handle and lifting it upward.

  Explaining the overall function of the mower, the front wheel adjusting levers 35L and 35R and the adjusting lever 55 of the traveling vehicle body 1 are operated and fixed at a predetermined cutting height position, and the engine 10 is started by the start rope 13 to operate the control unit. 2, the operator stands, operates the accelerator lever 23 to select the rotational speed of the engine 10, transmits the power to the drive roller unit 4 when operating the travel lever 25, and transmits the power to the cutting blade 71 when operating the work clutch lever 26. The operation is performed while correcting the direction of travel by applying a force to the handle 21, and when the cut leaves discharged from the discharge port at the rear of the casing 6 are stored in the grass collecting portion 8 and deposited in an appropriate amount, this is the traveling vehicle body. It is removed from 1 and discharged to a predetermined place and mounted again to continue the operation.

Next, an embodiment of the traveling vehicle body 1 incorporating the present invention will be described in detail with reference to FIGS.
The configuration of the traveling vehicle body 1 includes a casing 6 that forms an airframe and a machine frame, an engine 10 that serves as a power source, a cutting unit 7 that cuts grass and generates exhaust air, a driving roller unit 4 for traveling, and a driving roller unit 4. A roller support portion 5 incorporating the present invention that supports the height of the roller 5 in an adjustable manner and a freely rotating front wheel portion 3 that can be adjusted in height are mounted.

  That is, the engine 10 has a starting rope 13 at the top, has a work output shaft 11 projecting downward and a travel output shaft 12 projecting rearward, and is fastened and fixed to the central upper surface of the casing 6 serving as a machine frame. The cutting portion 7 is a power source, and the cutting portion 7 is provided with a belt-like cutting blade 71 provided with a twist in the direction of suction on both outer sides via a clutch 70 attached to the work output shaft 11, and has a lower opening box shape also serving as an air passage Are cut into a casing 6 and formed into a horizontal cut surface, and the cut leaves are discharged.

  The drive roller unit 4 interlocks and connects the travel output shaft 12 and the mission input shaft 15 disposed in the upper part of the mission case 14 by a refraction transmission tool 19, engages the mission input shaft 15, and activates the power by the operation of the clutch arm 18. It is linked to a hollow wheel drive shaft 17 projecting left and right via a clutch shaft 16 and a transmission that are intermittently arranged and arranged in the lower part of the transmission case 14, and a flange 41 b at the inner center and a bearing 41 c at the outer center. The roller left 41 and the roller right 42, which are fixed to each other, are engaged with and connected to the wheel drive shaft 17 in an engaged state in the rotational direction, and further, a sled body 48 having a concentric concentric arc with the roller 40 is used as a transmission case. 14 is a structure that is fastened and fixed to the lower end of 14 and suppresses the ground surface after running and cutting of the fuselage.

The roller support portion 5 has an adjustment latch 54 having a spring hooking hole and having a predetermined unevenness in an outer fold portion of an arc centered on the fulcrum shaft 56 </ b> L fixed to the left side wall of the casing body 61. One of the pair of fulcrum shafts 56L and 56R fixed to the fulcrum shaft seats 63L and 63R arranged at the lower left and right of the rear part is a belt-like elastic body having a detachable part with the recess of the adjustment latch 54 on the fulcrum shaft 56L. The adjustment lever 55 is attached, and the rotation seat 51b and the coupling seat 51c are fixed to the outer side of the adjustment lever 55, and the support left 51 is in the shape of an inner opening box provided with a groove and a spring hooking hole that are always engaged with the adjustment lever 55. The support fulcrum 52b, the connecting seat 52c, and the support right 52 for fixing the connecting shaft 52d are mounted on the connecting shaft 52d by rotatably fitting the drive roller portion 4 to the other fulcrum shaft 56R. At the same time, the connecting shaft 52d is fixed. The support right 52 and the support 51 are connected and fixed by a connecting shaft 52d by inserting a rotation prevention key 51e to prevent torsion, and a link mounting seat 62 arranged on the casing body 61 and a transmission case. 14, a link 47 is attached to the upper portion by stepped bolts 47b and 47b so as to be swingable.
Accordingly, the roller support portion 5 maintains the strength and torsional rigidity, supports the drive roller portion 4 by a three-point support method, and removes the adjustment lever 55 from the recess portion of the adjustment latch 54 and rotates it to match the planned recess portion. The height of the cutting is adjusted by changing the position of the roller with respect to.

  The front wheel portion 3 is a pair of cranks in which the front wheel mounting seats 64 </ b> L and 64 </ b> R disposed on both lower sides of the front portion of the casing body 61 are fixed to each other with a belt-like connecting body with one end projecting inward and the other projecting outward. The shafts projecting inwardly of the front wheel fixtures 32L and 32R are rotatably inserted to prevent the removal, and the front wheels 31L and 31R are rotatably attached to the other end. If the lower end of the elastic front wheel adjustment levers 35L and 35R having an engagement / disengagement part is fixedly disposed, the front wheel fixing levers 65L and 65R are respectively squeezed outwardly to be removed from the recesses of the front wheel fixing seats 65L and 65R and to be rotated. The position of the front wheel with respect to the cut surface changes, and is used to adjust the cutting height as with the drive roller unit 4.

  By incorporating these effects, it is possible to adjust the driving roller portion while maintaining the strength of the roller supporting portion with a portal configuration without arranging a member behind the driving roller, and on both outer sides of the roller supporting portion. It can be used as a drive roller support structure that requires position adjustment because it can be combined into a smooth shape without providing a robust cover, improving the appearance, ensuring safety, reducing the number of parts, and downsizing. Is big.

1 is an overall left side view of a mower incorporating the present invention. It is the whole top view similarly. It is a principal part left view similarly. It is a principal part right side view similarly. Similarly, it is an A arrow view. It is BB arrow sectional drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling vehicle body 2 Steering part 3 Front wheel part 4 Drive roller part 5 Roller support part 6 Casing 7 Cutting part 8 Grass collecting part 40 Roller (including right and left)
50 Roller support 68 Discharge port 70 Clutch A Shows the position of the arrow in the figure BB Shows the cross-sectional position and direction in the figure

Claims (3)

  A driving roller unit 4 for traveling that also serves as a pressure suppressor is disposed laterally at a rear rear portion of the cutting unit 7 in which the cutting surface is arranged substantially parallel to the ground surface, and the position of the driving roller unit 4 can be moved vertically with respect to the cutting surface In a mower that adjusts the cutting height by supporting the roller support 50, a roller support 50 that supports the drive roller unit 4 is detachably connected to a connecting shaft 52d between the support left 51 and the support right 52. The drive roller portion support structure is characterized in that the drive roller portion 4 is fitted and supported by the connecting shaft 52d.   Suppression is performed by a roller support 50 that is rotatably mounted on a pair of left and right fulcrum shafts 56L and 56R disposed in the rear part of a lower opening box-shaped casing 6 that houses a cutting portion 7 having a cutting surface disposed substantially parallel to the ground surface. Adjusting the cutting height in a mowing machine that adjusts the cutting height by supporting the driving roller section 4 that also serves as a lateral movement and supporting the position of the driving roller section 4 so as to be rotatable up and down with respect to the cutting surface. One support body constituting the roller support body 50 is engaged with the adjustment lever 55 for performing the above operation, and the seat mounted on one fulcrum shaft and the seat for fixing the coupling shaft 52d and one fulcrum in the side view. A drive roller support structure characterized in that it has an inner opening box shape having an arc close to an adjustment latch 54 centered on an axis, and a portion overlapping with one of the rollers being cut close. 3. The drive according to claim 2, wherein one of the supports constituting the roller support is engaged with one end of the balance spring and has an inner opening box shape for accommodating the balance spring in a side view. Support structure of the roller part.

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