JP2008196356A - Working vehicle for mowing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To periodically remove foreign matters adhered to a filter without using energy including electricity, in a working vehicle for mowing. <P>SOLUTION: On a side face of a hammer knife mower 1, a filter mechanism 40 is provided above a crawler 3. On the outer face of the filter 51, a wiper 52 is swingably mounted. The wiper 52 is rotated right and left due to inertial force and vibration. Due to the rotation of the wiper 52, foreign matters adhered to the filter 51 are scraped off and fallen down on the crawler 3. The foreign matters are carried by the crawler 3 and discarded. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a self-propelled or riding-type mowing work machine such as a hammer knife mower.

  For example, a mowing working machine such as a hammer knife mower is used to mow weeds and trees that grow on sloped lands such as dikes and rough terrain such as wasteland (Patent Document 1). The mowing work machine cuts and crushes grass and stems using the force generated by the built-in engine. The mowing work machine includes a filter, and this filter prevents grass, stems and other debris from being mixed into the air supplied to the engine or the like.

  If grass or stem fragments adhere to the filter and the filter becomes clogged, intake into the engine is hindered and the temperature inside the vehicle body rises. Therefore, the operator manually cleans the filter regularly or irregularly.

In addition, the technique which prevented that the path | route inside the working machine for mowing was clogged with the cut grass is known (patent document 2, patent document 3).
JP-A-11-225530 JP-A-10-248351 Japanese Patent Laid-Open No. 11-275924

  As described above, in a mowing work machine such as a hammer knife mower, a large amount of weeds and the like are mowed at a high speed while traveling, so that mowed grass, stem fragments, and the like are wound up. The rolled up grass, stalk fragments, and the like tend to clog the filter. For this reason, in the prior art, the operator sometimes needs to manually clean the filter, and there is room for improvement in terms of usability. Further, if the frequency of the manual filter cleaning operation increases, the efficiency of the mowing operation decreases. This is because the mowing operation needs to be temporarily interrupted in order to manually clean the filter. However, while the mowing work is performed, foreign matter such as weeds constantly adheres to the filter, so that the number of times the mowing work is interrupted increases, and as a result, the efficiency of the mowing work decreases.

  In addition, Patent Documents 2 and 3 disclose a technique for preventing the passage for collecting the cut grass from being clogged by the cut grass, but the reference regarding filter clogging is not included at all. Absent.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a working machine for mowing that can reduce the cleaning work of the filter. Another object of the present invention is to be able to automatically remove at least a part of the foreign matter adhering to the filter by using vibration and operation force generated in normal use without using special power. It is in providing the working machine for mowing.

  A mowing machine (1) for mowing grass while traveling according to the present invention, a work vehicle main body, a traveling body provided on a lower side of the work vehicle main body, and a mowing unit provided on a front side of the work vehicle main body. A machine room that is provided in the work vehicle main body and accommodates at least a radiator therein, a travel lever device that can control the operation of the traveling body and the mowing unit, and a side part of the machine room that is located above the traveling body. A filter mechanism for removing foreign matter from the air flowing into the machine chamber, and a machine chamber of both sides of the filter, with one end side serving as a rotation fulcrum and the other end serving as a free end. Includes at least one wiper member rotatably provided near one surface located on the opposite side, and a filter mechanism.

  The filter mechanism may be provided on a side surface of the machine room so as to face the radiator, and a duct member for guiding the air that has passed through the filter to the radiator may be provided in the machine room.

  You may set the diameter dimension of the air circulation hole which the said filter has smaller than the fin pitch of a radiator.

  The wiper member includes a flexible foreign matter removing portion that comes into contact with the one surface of the filter to remove the foreign matter, and presses the foreign matter removing portion against the one surface of the filter. It may be attached.

  The rotation fulcrum of the wiper member and the travel lever device may be mechanically connected via an operation force transmission member, and the wiper member may be rotated according to the operation of the travel lever device.

  According to the present invention, vibrations and inertial forces are generated along with cutting operations such as weeds, and the wiper member is driven by these vibrations and inertial forces. Thereby, the wiper member can automatically remove grass and stems attached to the filter or fragments thereof without consuming electricity or other power energy. Therefore, it is possible to improve the usability by reducing the frequency of the filter cleaning work, and to increase the efficiency of the mowing work. Furthermore, foreign substances (grass, stems or fragments thereof) removed from the filter can be transported to the traveling body and discarded, and the cleaning work can be further reduced.

  Also, if a duct member is provided between the filter and the radiator, the air that has passed through the filter can be efficiently supplied to the radiator, and the warm air that has passed through the radiator is upstream (between the filter and the radiator). ) Can be suppressed.

  Furthermore, if the wiper member is attached so that the foreign substance removal part provided on the wiper member is pressed against the outer surface of the filter, even if the filter is bent due to vibration or the like, the foreign substance removal part and the filter are brought into contact with each other to remove the foreign substance. can do.

  Further, if the traveling lever device and the wiper member are connected by the operation force transmission member, the wiper member can be rotated according to the cutting operation.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, a hammer knife mower will be described as an example of a mowing work machine. As described in detail below, in this embodiment, the wiper 42 is rotatably provided on the surface of the filter 41 provided on the side surface of the hammer knife mower 1. When the mowing operation is performed while the hammer knife mower 1 is traveling, the wiper 42 is rotated by the inertial force and vibration generated by the operation, and the foreign matter adhering to the filter 41 is scraped off. The foreign matter scraped off falls on the crawler 3 and is carried by the crawler 3 and discarded. In order to understand and implement the present invention, first, the overall structure of the hammer knife mower will be described, and then the filter mechanism will be described.

  FIG. 1 is a perspective view of a hammer knife mower 1. As will be described later, the hammer knife mower 1 is a device that crushes weeds, small trees, and the like by running while rotating a cutter 16 (see FIG. 2) such as a hammer at a high speed. The hammer knife mower 1 includes, for example, a vehicle main body 2, a crawler 3, and a work machine 4.

  A crawler 3 as a “running body” is provided below the vehicle body 2 as a “work vehicle body”. As will be described later, the vehicle body 2 is provided with machine rooms 20 and 30 (see FIG. 3) for accommodating an engine 22 (see FIG. 4) and a hydraulic device (not shown). The outside of the vehicle body 2 is covered with an exterior 5.

  A cover 6 is attached to the upper side of the vehicle body 2 so as to be openable and closable. The base end side of the cover 6 is rotatably attached to the front side of the vehicle body 2. The front end side of the cover 6 is provided so as to extend toward the control device 8 side. Thereby, the cover 6 is provided so that opening and closing is possible so that the upper side of the vehicle main body 2 may be covered. By opening the cover 6, the operator can perform maintenance of the machine rooms 20 and 30. A step 7 is provided in the lower rear portion of the vehicle body 2. The operator stands at step 7 and operates the hammer knife mower 1. On the rear side of the vehicle body 2, a steering device 8 described later is provided, and a protection bar 8A is provided so as to surround an operator who operates the steering device 8.

  On the front side of the vehicle body 2, a working machine 4 as a “mowing unit” is provided so as to be swingable up and down. The work machine 4 includes, for example, a cutter case 10, a cutter cover 11, left and right side links 12, left and right side springs 13, left and right side sleds 14, a rotating shaft 15, and a plurality of cutters 16. Composed.

  The cutter case 10 accommodates the rotating shaft 15 and the cutter 16. A cutter cover 11 is attached to the front lower portion of the cutter case 10 via a link 12 and a spring 13 so as to be opened and closed. With this configuration, the opening amount of the cutter cover 11 changes according to the height of the weeds or the like that are the objects to be cut. When the height of weeds is low, the opening amount of the cutter cover 11 is small. As a result, pebbles and the like are prevented from splashing forward from within the cutter case 10. When the height of the weeds is high, a force in the opening direction (upward) is applied to the cutter cover 11, and the amount of opening of the cutter cover 11 increases. Thereby, a large amount of tall weeds can be taken into the cutter case 10 and crushed. A sled 14 is provided below the both side surfaces of the cutter case 10.

  FIG. 2 is a front view showing the cutter cover 11 in an opened state. The rotating shaft 15 provided in the cutter case 10 is rotated by, for example, a hydraulic motor. The rotary shaft 15 is provided with a plurality of hammer knife type cutters 16 spaced apart in the axial direction.

  FIG. 3 is a side view of the hammer knife mower 1. The vehicle body 2 includes machine rooms 20 and 30. The machine room 20 is located on the rear side of the vehicle body 2, and the machine room 30 is located on the front side of the vehicle body 2. One machine room 20 accommodates, for example, the engine 22 and the radiator 23 (see FIG. 3). The other machine room 30 accommodates, for example, a fuel tank 31 and a hydraulic oil tank 32. A partition wall 9 having an opening is provided between the machine room 20 and the machine room 30.

  A filter mechanism 40 is provided on the side surface of the machine room 20. The filter mechanism 40 is for supplying normal air into the machine room 20. Although details of the filter mechanism 40 will be described later, briefly described above, the filter mechanism 40 includes, for example, at least one filter 41 and at least one wiper 42. The base end side of the wiper 42 is rotatably attached to a pin 43 provided on the upper side of the filter 41. The front end side of the wiper 42 is a free end. The wiper 42 rotates in the front-rear direction of the hammer knife mower 1 using inertial force and vibration generated by running and work of the hammer knife mower 1. Due to the rotation of the wiper 42, the foreign matter attached to the filter 41 falls on the crawler 3.

  The control device 8 is provided on the rear side of the vehicle body 2. The control device 8 includes, for example, a travel lever 8B, a parking brake lever, a cutter clutch lever, a cutting height adjustment knob, an engine speed adjustment lever, an engine start switch, a monitor panel, and the like. In the figure, the traveling lever 8B is denoted by a reference numeral, and other levers and switches are omitted as appropriate.

  FIG. 4 is an explanatory diagram showing the relationship between the filter mechanism 40 and the engine 22 and the like. FIG. 4 schematically shows a cross section of the machine room 20. The upper side in FIG. 4 is the rear side of the hammer knife mower 1, and the lower side in FIG. 4 is the front side of the hammer knife mower 1. In this example, the filter mechanism 40 is provided on the left side surface of the hammer knife mower 1.

  A cooling fan 24 is provided on the drive shaft 22 </ b> A of the engine 22. A radiator 23 is provided on the front side of the cooling fan 24. A filter mechanism 40 is provided on the front side of the radiator 23. That is, a filter mechanism 40, a radiator 23, a cooling fan 24, and an engine 22 are arranged in the machine room 20 in order from the outside.

  The radiator 23 is a heat exchange device for cooling the heat taken from the engine 22. The radiator 23 includes a large number of fins 23A. The radiator 23 cools a medium such as water by releasing heat into the air from the surface of each fin 23A.

  Here, in this embodiment, the diameter P1 of the air circulation hole 41A (see FIG. 7) of the filter 41 is set to be smaller than the fin pitch P2 (P2> P1). Thereby, it can suppress that the very small foreign material which passed the filter 41 is clogged between the fins 23A, and cooling efficiency falls.

  When the cooling fan 24 rotates, the air outside the hammer knife mower 1 passes through the filter 41 and flows into the machine room 20 as indicated by an arrow A1. The air that has passed through the filter 41 passes between the fins 23A of the radiator 23 and takes heat away from the radiator 23, as indicated by an arrow A2. The warm air that has absorbed the heat from the radiator 23 flows behind the cooling fan 24 and is discharged to the outside through an exhaust port (not shown).

  Here, in this embodiment, a duct 25 as a “duct member” is provided so as to surround the outside of the radiator 23 and the cooling fan 24. The duct 25 is formed in, for example, a cylindrical shape or a rectangular tube shape, and is provided so as to cover a range from the back side of the filter 41 (side facing the machine room 20) to the rear of the cooling fan 24. . With this duct 25, the amount of air blown by the cooling fan 24 can be increased. Further, the duct 25 can prevent the warm air that has passed through the radiator 23 from passing through the radiator 23 again. Thereby, the fall of cooling efficiency can be prevented. In FIG. 4, the duct 25 is shown as if it covers a position close to the engine 22, but the length of the duct 25 is appropriately set from the viewpoint of increasing the fan air flow rate, for example. .

  As described in conjunction with FIGS. 3 and 4, the filter mechanism 40 is provided on the side surface of the machine room 20 so as to be located above the crawler 3. The filter mechanism 40 includes, for example, a filter 41 and a wiper 42.

  The filter 41 is configured as a substantially flat metal filter, for example. Like a so-called punching board, the filter 41 can be manufactured by making a large number of small holes in a metal plate. However, the filter 41 does not need to be a metal filter, and the material and shape thereof are not particularly limited. The filter 41 is provided on the side surface of the machine room 20 so as to face the radiator 23. As already described, the diameter P1 of the air circulation holes of the filter 41 is set to be smaller than the fin pitch P2 of the radiator 23.

  FIG. 5 is a schematic diagram when the filter mechanism 40 is viewed from the front. A wiper 42 is rotatably provided on the outer surface side of the filter 41. FIG. 6 is an enlarged perspective view showing the wiper 42. The wiper 42 is provided, for example, on a long plate-like wiper blade 42A, a mounting portion 42B provided on the base end side (upper side in FIG. 6) of the wiper blade 42A, and a rear side (filter 41 side) of the wiper blade 42A. Wiper rubber 42D.

  A mounting hole 42C is provided in the mounting portion 42B, and a pin 43 is inserted into the mounting hole 42C for mounting. The pin 43 is attached to the vehicle body 2 so as to be positioned above the filter 41, for example. The wiper rubber 42D will be described later together with another drawing.

  Returning to FIG. The wiper 42 swings on the outer surface side of the filter 41 in the arrow R1 direction or the arrow R2 direction. The R1 direction is the backward direction of the hammer knife mower 1, and the R2 direction is the forward direction of the hammer knife mower 1. For example, when the hammer knife mower 1 moves forward from the stationary state, the hammer knife mower 1 stops from either the forward or reverse state, or when the hammer knife mower 1 moves backward from the stationary state, the wiper 42 rotates in the R1 and R2 directions by inertial force. The wiper 42 also rotates in the directions R1 and R2 due to vibration during traveling or mowing. As the wiper 42 swings in the R1 and R2 directions, the outer surface of the filter 41 is cleaned by the area of the range S1.

  As the wiper 42 rotates in the range S <b> 1, the foreign matter attached to the outer surface of the filter 41 is scraped off and falls onto the crawler 3. The foreign matter is transported by the crawler 3 and falls to the ground. The crawler 3 passes over the foreign material that has fallen on the ground, and then hardens it. Accordingly, it is possible to suppress the foreign matter scraped off from the filter 41 from rising again and reattaching to the filter 41.

  7 is a cross-sectional view in the direction of arrows VII-VII in FIG. The wiper rubber 42D is formed in a flat plate shape having flexibility such as synthetic resin or synthetic rubber. That is, the wiper rubber 42D has elasticity, and bends according to a load applied from the outside.

  FIG. 7 shows an initial state of the wiper rubber 42D. In the initial state, an initial load is applied to the wiper rubber 42D, and the wiper rubber 42D is in contact with the outer surface of the filter 41 in a bent state. For example, the wiper blade 42A itself may be provided with a spring property so that the wiper rubber 42D is pressed against the filter 41, or a spring member for pressing the wiper blade 42A against the filter 41 is provided separately. Also good. The wiper rubber 42D moves in the R1 and R2 directions on the outer surface of the filter 41 while being pressed against the filter 41.

  FIG. 8 is an explanatory diagram schematically illustrating how the wiper rubber 42 </ b> D follows the displacement of the filter 41. The filter 41 is displaced in the vertical direction in FIG. 8 by the vibration generated during the operation of the hammer knife mower 1. As shown in FIG. 8A, when the filter 41 is displaced upward, the distance between the wiper blade 42A and the filter 41 is shortened, and the wiper rubber 42D is urged upward. As a result, the wiper rubber 42D comes into contact with the filter 41 in a state where the amount of deflection is increased.

  Conversely, as shown in FIG. 8B, when the filter 41 is displaced downward, the distance between the wiper blade 42A and the filter 41 increases, and the wiper rubber 42D expands. As a result, the wiper rubber 42D comes into contact with the filter 41 in a state where the amount of deflection is reduced.

  Thus, by attaching the wiper rubber 42D having flexibility so as to press against the filter 41, the posture (shape) of the wiper rubber 42D can be changed according to the displacement of the filter 41. Therefore, even when the filter 41 is displaced, the front end side (lower end side in FIG. 8) of the wiper rubber 42D does not move away from the outer surface of the filter 41, and foreign matter adhering to the filter 41 can be removed.

  Note that, by pressing the wiper rubber 42D against the outer surface of the filter 41, the frictional force between the wiper rubber 42D and the filter 41 increases. This frictional force may hinder smooth swinging of the wiper 42. Therefore, the initial load when the wiper rubber 42D is pressed against the filter 41 is preferably set to a value such that the frictional force between the wiper rubber 42D and the filter 41 does not hinder the wiper 42 from swinging.

  FIG. 9 is an explanatory diagram showing an example of weeding work by the hammer knife mower 1. The hammer knife mower 1 is used, for example, to efficiently remove weeds 1002 that grow on an inclined land 1000 such as an embankment. Not only the weeds 1002 on the sloped land 1000 but also the weeds growing on the flat ground 1001 can be cut by the hammer knife mower 1. One advantage of the hammer knife mower 1 is that it mainly crushes the aboveground portion of the weed and leaves the root of the weed. Therefore, by using the hammer knife mower 1, weeds can be mowed without reducing the strength of structures such as a bank and a fence.

  When removing the weeds 1002 on the sloping ground 1000 by the hammer knife mower 1, the hammer knife mower 1 travels on the sloping ground 1000 while reversing the traveling direction as shown in the traveling paths W1 to W4. The hammer knife mower 1 may temporarily stop and re-start while traveling on the traveling paths W1 to W4. The wiper 42 cleans the outer surface of the filter 41 by the inertial force generated when starting, running on a curve, or the like.

  Further, the flat land 1001 and the sloped land 1000 have a large number of irregularities, and furthermore, empty bottles, empty cans, pebbles, and various foreign substances are scattered. Therefore, for example, when the cutter 16 hits a foreign object such as a pebble or the crawler 3 travels on uneven ground, the hammer knife mower 1 is vibrated. The wiper 42 cleans the outer surface of the filter 41 by vibration generated during the operation of the hammer knife mower 1.

  According to this embodiment configured as described above, the wiper 42 can be operated using the inertial force and vibration naturally obtained by normal use of the hammer knife mower 1, and the weeds attached to the filter 41 can be operated. It is possible to remove foreign matters such as. Therefore, in this embodiment, the filter 41 can be automatically cleaned without using a special power source such as an electric motor.

  This eliminates the need for the operator to manually clean the filter 41 and improves the efficiency of mowing work. Moreover, since at least the inflow area of the range S1 to be cleaned by the wiper 42 can be ensured, an increase in engine temperature or the like can be suppressed, the occurrence of overheating can be prevented, and the usability of the hammer knife mower 1 is improved.

  In this embodiment, the filter mechanism 40 is provided on the upper part of the crawler 3, and the foreign matter removed by the wiper 42 is dropped on the crawler 3. Therefore, the foreign matter removed from the filter 41 is transported by the crawler 3 to the ground. It can be discarded as embedded. Therefore, it is possible to prevent the foreign matter scraped off from the filter 51 from remaining in the lower side of the filter 51. That is, the foreign matter scraped off from the filter 51 can be automatically cleaned by the crawler 3, and the usability is improved. Furthermore, it is possible to prevent foreign matters removed from the filter 41 from rising and adhering to the filter 41 again.

  In this embodiment, since the duct 25 is provided so as to cover from the back surface side of the filter 41 to the rear of the cooling fan 24, the air from which foreign matter has been removed by the filter 41 can be efficiently guided to the radiator 23, and the fan air flow rate Can be increased. Further, since the duct 25 is provided so as to cover the entire radiator 23 from at least the back surface side of the filter 41, it is possible to prevent the warm air that has passed through the radiator 23 from being guided to the radiator 23 again. The cooling efficiency can be increased.

  In the present embodiment, the diameter P1 of the air circulation hole of the filter 41 is set to be smaller than the fin pitch P2 of the radiator 23. Therefore, even when a minute foreign matter passes through the filter 41, the fine foreign matter causes It is possible to suppress clogging of the gap between 23A, and it is possible to suppress a decrease in the cooling performance of the radiator 23.

  In this embodiment, the wiper rubber 42D on the back surface side of the wiper blade 42A is pressed against the outer surface of the filter 41 and used in a bent state, so that the filter 41 is displaced in a direction perpendicular to the plane of the filter 41. However, the wiper rubber 42D can be kept in contact with the filter 41. Thereby, even when the filter 41 is displaced by vibration during the operation of the hammer knife mower 1, the foreign matter adhering to the filter 41 can be removed by the wiper 42.

  A second embodiment will be described with reference to FIGS. In this embodiment, the wiper 52 is driven by the force obtained when the travel lever device 8 is operated. FIG. 10 is an explanatory view schematically showing a filter mechanism 50 used in the hammer knife mower 1 of the present embodiment.

  Similar to the filter mechanism 40, the filter mechanism 50 is located on the crawler 3 and is provided on the side surface of the machine room 20 so as to face the radiator 23. Similar to the filter mechanism 40, the filter mechanism 50 includes a filter 51 and a wiper 52. The diameter P1 of the air circulation holes of the filter 51 is set to be smaller than the fin pitch P2, and the range from the back surface side of the filter 51 to the cooling fan 24 is covered with the duct 25.

  This embodiment is different from the above embodiment in the driving method of the wiper 52. In the above embodiment, the wiper 42 is driven using inertial force and vibration, whereas in this embodiment, the wiper 52 is driven using the force when the operator operates the travel lever device 8.

  Therefore, the configuration of the wiper 52 will be described. Similar to the wiper 42, the wiper 52 includes a wiper blade 52A, a mounting portion 52B, and a wiper rubber (not shown). The wiper rubber of the present embodiment can be configured similarly to the wiper rubber 42D.

  The wiper 52 is attached so as to be rotatable at one of the left and right corners above the filter 51, for example. For example, as shown in FIG. 10, the attachment portion 52 </ b> B is rotatably attached to a pin 53 provided at the upper right of the filter 51.

  Further, the attachment portion 52 </ b> B is connected to the traveling lever 8 </ b> B of the traveling lever device 8 via a link mechanism 54 as an “operation force transmission member”. The travel lever 8B is a lever for moving the hammer knife mower 1 forward or backward. As shown in FIGS. 11 and 12, the link mechanism 54 can be configured to include, for example, a cable or a wire.

  When the operator tilts the traveling lever 8B in the direction of arrow R3, the hammer knife mower 1 moves forward, and when the operator pulls back the traveling lever 8B in the direction of arrow R4, the hammer knife mower 1 moves backward. The link mechanism 54 transmits this operating force to the wiper 52 when the travel lever 8B is operated in the forward direction (R3 direction) or the reverse direction (R4 direction).

  The wiper 52 rotates in the direction indicated by the arrow R <b> 2 by the operation force transmitted from the link mechanism 54, and scrapes foreign matter adhering to the outer surface of the filter 51 onto the crawler 3. Similarly, when the operator pulls back the traveling lever 8B toward the front side (R4 direction), the wiper 52 rotates in the arrow R1 direction and cleans the outer surface of the filter 51.

  FIG. 11 is a perspective view showing the machine room 20 and the like focusing on the filter 51, the wiper 52, and the link mechanism. FIG. 12 is a front view of the filter mechanism 50. As shown in FIG. 12, the length dimension L and the rotation angle θ of the wiper 52 are set such that the area of the cleaning range S2 is maximized as much as possible, for example, in a range where the wiper 52 does not interfere with the crawler 3. The For example, the rotation angle θ can be set to about 80 degrees, but the present invention is not limited to 80 degrees.

  Configuring this embodiment like this also achieves the same effects as the first embodiment. That is, also in this embodiment, the wiper 52 is driven using a normal force (manual force by the operator) generated during the operation of the hammer knife mower 1 without using a special drive source such as an electric motor. And the filter 51 can be cleaned.

  As described with reference to FIG. 9, the hammer knife mower 1 performs the mowing work while changing the travel path, so the operator operates the travel lever 8B relatively frequently. Therefore, during the operation of the hammer knife mower 1, the traveling lever 8B is tilted in the R3 direction or the R4 direction, and the wiper 52 is rotated by this operation. Thereby, the foreign material adhering to the filter 51 is removed periodically or aperiodically according to the progress of the mowing work.

  The present invention is not limited to the above-described embodiment. A person skilled in the art can make various additions and changes within the scope of the present invention. For example, as a mowing work machine, a hammer knife mower of a type in which an operator stands and operates behind a vehicle has been described as an example, but the present invention is not limited thereto, and for example, a passenger car type mowing work machine or a hand push It can also be applied to a conventional mowing machine or various agricultural machines.

The perspective view of a hammer knife mower. The front view of a working machine. A side view of the hammer knife mower. The top view for description which shows typically relations, such as a filter and an engine. The side view for explanation which shows typically the relation between a filter mechanism and a crawler. The perspective view which expands and shows a wiper. FIG. 7 is a cross-sectional view in the direction of arrows VII-VII in FIG. 6. Explanatory drawing which shows a mode that a wiper rubber deform | transforms following the displacement of a filter. Explanatory drawing which shows the mode of the mowing work by a hammer knife mower. Explanatory drawing which shows typically the filter mechanism used for the hammer knife mower of 2nd Example. The perspective view which expands and shows a machine room paying attention to a filter mechanism. The front view of a filter mechanism.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Hammer knife mower, 2 ... Vehicle main body, 3 ... Crawler, 4 ... Working machine, 5 ... Exterior, 6 ... Cover, 7 ... Step, 8 ... Steering device, 8A ... Protection bar, 8B ... Travel lever, 10 ... Cutter Case, 11 ... Cutter cover, 12 ... Link, 13 ... Spring, 14 ... Warp, 15 ... Rotating shaft, 16 ... Cutter, 20, 30 ... Machine room, 22 ... Engine, 22A ... Drive shaft, 23 ... Radiator, 24 ... Cooling fan, 25 ... duct, 31 ... fuel tank, 32 ... hydraulic oil tank, 40, 50 ... filter mechanism, 41, 51 ... filter, 41A ... air flow hole, 42, 52 ... wiper, 42A, 52A ... wiper blade, 42B, 52B ... mounting portion, 42C ... mounting hole, 42D ... wiper rubber, 43, 53 ... pin, A1, A2: air flow, S1, S2: cleaning range by wiper

Claims (5)

A mowing machine (1) for cutting grass while traveling,
A work vehicle body (2);
A traveling body (3) provided on the lower side of the work vehicle body;
A mowing unit (4) provided on the front side of the work vehicle body;
A machine room (20) provided in the work vehicle main body and containing at least a radiator (23) therein;
A traveling lever device (8) capable of controlling the operations of the traveling body and the mowing unit,
A filter mechanism (40, 50) provided on a side portion of the machine room located above the traveling body, the filter (41, 51) for removing foreign substances from the air flowing into the machine room One end side is a rotation fulcrum (42B, 52B) and the other end side is a free end so that it can be rotated close to one surface located on the opposite side of the machine room from both sides of the filter. A filter mechanism comprising at least one wiper member (42, 52) provided;
Including mowing work machines. The filter mechanism (40, 50) is provided on the side surface of the machine room (20) so as to face the radiator (23), and
The mowing work machine according to claim 1, wherein a duct member (25) for guiding the air that has passed through the filter (41, 51) to the radiator is provided in the machine room.   The working machine for mowing according to claim 2, wherein a diameter dimension (P1) of an air circulation hole of the filter (41, 51) is set smaller than a fin pitch (P2) of the radiator (23).   The wiper member (42, 52) includes a flexible foreign matter removing portion (42D) for contacting the one surface of the filter (41, 51) to remove the foreign matter, and The working machine for mowing according to claim 1, wherein the foreign matter removing unit is attached so as to press against the one surface of the filter.   The rotation fulcrum (52B) of the wiper member (52) and the travel lever device (8) are mechanically connected via an operation force transmission member (54), and according to the operation of the travel lever device. The mowing work machine according to claim 1, wherein the wiper member (52) is rotated.

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