JP2019141003A - Self-propelled mowing machine - Google Patents

Abstract

To provide a self-propelled mowing machine that can prevent an abnormal load and abnormal heat generation of a traveling motor and a cutting blade motor, and thereby can efficiently perform the mowing work continuously for a long time.SOLUTION: A self-propelled mowing machine 1 includes: a body unit 2; a traveling unit 3 provided at the traveling direction right-left sides of the body unit 2, and having a traveling motor 31 for drive traveling; and a working unit 4 positioned in front of the body unit 2 and the traveling unit 3, and for working. The working unit 4 includes: multiple cutting blades 53 for cutting grass; a cutting blade housing 43 for covering a portion of upper parts and side faces of the cutting blades 53; and a cutting blade motor 51 positioned at the bottom side of the cutting blade housing 43, and for rotationally driving the cutting blades 53.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a mower. Specifically, the present invention relates to a self-propelled mower that can be operated by an operator to perform mowing work.

  A self-propelled mower described in Patent Document 1 is known. This self-propelled mower has a machine body having a traveling part, and a cutting blade part for flat cutting provided in the front part of the machine body, and three or more rotary cutting blades of the cutting blade part are provided on the left and right. Each of the rotary blades of the cutting blade portion located on both the left and right sides of the machine body can change the inclination angle in the left-right direction. It is a self-propelled mower. An electric motor is used for driving the self-propelled mower and driving the cutting blade.

JP 2017-176153 A

In mowing work using a self-propelled mower, it is required to be able to work continuously. Also, mowing work is often carried out during summer days, especially under hot weather, as weeds grow. In the self-propelled mower of Patent Document 1, the motor that rotates the cutting blade is disposed and attached so as to penetrate the cutting blade cover. In this self-propelled mower, the cutting blade motor is overloaded due to the biting of foreign matter such as grass or stone that is the object to be cut into the cutting blade and winding around the rotary blade, and the cutting blade motor is damaged. There's a problem. Furthermore, there is a problem that the blade motor is damaged by the abnormal rise in temperature of the blade motor due to continued shining in direct sunlight.
Furthermore, the grass cut by the cutting blade may scatter and adhere to the crawler, drive sprocket, and driven sprocket that constitute the traveling unit. If grass enters the crawler and the drive sprocket or driven sprocket, the effective diameter of the drive sprocket and driven sprocket increases due to the grass stuck to the outer periphery of the rotation. As a result, there is a problem that the tension applied to the crawler increases and the driving load of the traveling motor that drives the crawler increases.

  Therefore, the present invention has been made with the above problems in mind, and can prevent abnormal loads and abnormal heat generation of the travel motor and the cutting blade motor, and can efficiently perform grass cutting work continuously for a long time. The purpose is to provide a self-propelled mower.

The invention for achieving the above object is provided with a main body part, a traveling part provided on the left and right sides in the traveling direction of the main body part, having a traveling motor for driving driving, and located in front of the main body part and the traveling part, A working section for cutting the grass, the working section is positioned on the lower surface side of the cutting blade housing, a plurality of cutting blades for cutting grass, a cutting blade housing that covers a part of the upper side and side of the cutting blade A self-propelled mower having a cutting blade motor for rotationally driving a cutting blade.
Further, in the invention for achieving the above object, the cutting blade motor is provided so as to cover the cutting blade motor, protects the cutting blade motor, dissipates heat of the cutting blade motor, and is attached to the lower surface of the cutting blade housing. A self-propelled mower further provided with a motor case.
Furthermore, the invention for achieving the above object is a self-propelled mower characterized in that the motor case is a material made of metal.
Furthermore, the invention for achieving the above object is provided on the lower surface portion of the main body portion, guiding the grass after cutting to the lower portion of the main body portion and the rear of the main body portion, and the traveling portion is a side surface portion inside the traveling portion. The self-propelled mower further provided with a guard member that is provided on the inside and prevents a foreign substance from entering the inside of the traveling unit.
Further, the invention for achieving the above object is that the cutting blade housing further includes an open portion in which a part of the rear surface is opened, and a rear guard provided on the rear side of the open portion. It is.
Furthermore, the invention for achieving the above object is a traveling mower that further includes a wireless controller that is used by a worker to operate the traveling unit and the mowing operation in the working unit.
Furthermore, the invention for achieving the above object is a self-propelled mower further provided with a battery mounted on the upper portion of the main body and serving as a power source for the traveling motor.

  ADVANTAGE OF THE INVENTION According to this invention, the self-propelled mower which can prevent the abnormal load and abnormal heat generation of a traveling motor and a cutting blade motor, and can perform mowing work efficiently continuously for a long time can be provided.

It is a top view of the self-propelled mower of one embodiment of the present invention. It is a front view of the self-propelled mower of one embodiment of the present invention. It is a left view of the self-propelled mower of one embodiment of the present invention. It is a right view of the state which sectioned the crawler belt of the self-propelled mower of one embodiment of the present invention. It is a bottom view of the self-propelled mower of one embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of a self-propelled mower according to an embodiment of the present invention, taken along line AA in FIG. FIG. 2 is an enlarged cross-sectional view of the self-propelled mower according to the embodiment of the present invention, taken along line AA in FIG. 1 and enlarging a cutting blade housing and a cutting blade portion.

Next, an embodiment of the present invention will be described with reference to the drawings. However, the drawings are schematic, and the relationship with the dimensions of each part may differ from the actual one.
The technical idea of the present invention can be variously modified within the technical scope defined by the claims set forth in the claims.

  1 to 7 show a self-propelled mower 1 according to an embodiment of the present invention. In the description, the left direction in FIG. 1 is the front with respect to the work progress direction, the right direction in FIG. 1 is the rear with respect to the work progress direction, the upper direction in FIG. 1 is the right direction with respect to the work progress direction, and the lower direction in FIG. Will be described as the left direction.

  A self-propelled mower 1 shown in FIG. 1 includes a main body 2 that is a main body skeleton of the airframe, and a travel unit 3 that is provided on the left and right sides in the traveling direction of the main body 2 and has a travel motor 31 that drives a crawler belt 35. And a working unit 4 that is located in front of the main body unit 2 and the traveling unit 3 and for performing work. In this embodiment, the working unit works to cut grass. Further, on the rear side in the upper part of the main body part 2, the battery 6 as a driving source of the cutting motor 51 provided in the traveling motor 31 and the working part 4, and the traveling part 3 in the upper part of the main body part 2 on the front side. And the control part 7 which controls drive, steering, etc. of the working part 4 is installed. Further, when the operator operates the transmitter 8 that transmits a control signal to the control unit 7, the self-propelled mower 1 is operated and travels while cutting the weeds on the ground.

The main body 2 includes a main body frame 20 configured by combining a plurality of square pipes in a lattice shape, and a guide plate 21 that covers the lower surface of the main body frame 20. The main body frame 20 is horizontally disposed with the first square pipe 20a, the second square pipe 20b, the third square pipe 20c, and the fourth square pipe 20d facing from the front side to the left and right directions in the traveling direction. . In this embodiment, the fourth square pipe 20d on the rear side in the traveling direction is set shorter than the other three first to third square pipes 20a, 20b, and 20c.
Further, a plurality of square pipes whose ends are directed in the front-rear direction of the traveling direction are arranged symmetrically so as to connect the first to fourth square pipes 20a, 20b, 20c, and 20d. In this embodiment, a fifth pipe 20e that connects the first and second square pipes, a sixth pipe 20f that connects the second and third square pipes, and a seventh pipe 20g that connects the third and fourth square pipes, respectively. The main body frame 20 is configured by being fixed two by two.

A guide plate 21 made of a rectangular plate is fixed to the lower surface of the main body frame 20. The guide plate 21 covers from the front part of the first square pipe 20a to the middle part of the seventh square pipe 20g and to the left and right end parts in the traveling direction of the first to third square pipes 20a, 20b, 20c. The guide plate 21 has an effect of guiding dust such as soil generated during traveling and work of the self-propelled mower 1 and grass after cutting without intruding into the upper portion of the main body frame 20.
Further, since the lower surface of the guide plate 21 is a uniform surface, grass and obstacles passing through the lower surface of the guide plate 21 can be passed without being caught during traveling.

  A traveling unit 3 is arranged on each of the left and right sides of the traveling direction of the main body unit 2. The traveling unit 2 includes a traveling frame 30 that is a skeleton of the traveling unit 2, a traveling motor 31 that is supported on an upper portion on the rear side of the traveling frame 30, drive wheels 32 that are attached to the traveling motor 31, and the traveling frame 30. A roller wheel 33 supported by a lower part on the rear side, a driven wheel 34 supported on the front side of the traveling frame 30, a crawler belt 35 wound around the drive wheel 32, the wheel 33, and the driven wheel 34; A guard member 36 which is a member for preventing scattered objects from entering is provided.

The traveling frame 30 includes a wheel support frame 30a in which a plate that is long in the front-rear direction of the traveling direction is bent in a U shape as shown in FIG. 4 and the opening is directed downward, and a rear end of the wheel support frame 30a. It has an outer motor support member 30f and an inner motor support member 30g that are fixed so as to extend rearward and upward in the direction of travel and support a travel motor 31 described later. The wheel support frame 30a is positioned on the left and right sides of the main body frame 20 in the traveling direction, and is fixed to the left and right end surfaces of the first square pipe 20a, the second square pipe 20b, and the third square pipe 20c.
A driven wheel 34 is located in front of the wheel support frame 30a and is rotatably mounted. The rotation axis of the driven wheel 34 is set in a direction orthogonal to the traveling direction. The outer diameter of the driven wheel 34 in this embodiment is 220 mm.
A wheel 33 is rotatably mounted behind the wheel support frame 30a, and its rotation axis is set in a direction orthogonal to the traveling direction. In other words, the rotation axis of the wheel 33 is parallel to the driven wheel 34. The outer diameter of the wheel in this embodiment is 120 mm. Further, the driven wheel 34 and the wheel 33 are disposed so as to be sandwiched between plates of the wheel support frame 30a bent in a U-shape.

  The outer motor support member 30f and the inner motor support member 30g are provided in a shape in which the corners of the front lower part are partially cut away with the rear side of the rectangular plate long in the front-rear direction being lifted upward. Further, the outer motor support member 30f and the inner motor support member 30g are fixed so as to extend the side surface part of the wheel support frame 30a from the rear part of the wheel support frame 30a toward the upper rear part. The outer motor support member 30f is provided on the outer side of the self-propelled mower 1, and the inner motor support member 30g is provided on the main body frame 20 side. The distance between the outer motor support member 30f and the inner motor support member 30g is bent in a crank shape so that the rear side becomes wider.

  A traveling motor 31 is located behind the outer motor support member 30f and the inner motor support member 30g. The travel motor 31 has output shafts 31b protruding from the left and right sides of the traveling direction of the housing 31a. The housing 31a rotates by fixing the output shaft 31b to the outer motor support member 30f and the inner motor support member 30g. The rotational axis of the traveling motor 31 is perpendicular to the traveling direction, and is parallel to the rotational axes of the driven wheel 34 and the rolling wheel 33.

  On the outer peripheral side of the central portion of the housing 31a, a drive wheel 32 is attached so that its rotational axis is coaxial with the rotational axis of the travel motor 31. The drive wheel 32 attached to the travel motor 31 is rotationally driven by the drive of the travel motor 31. The drive wheel 32 has a plurality of concave and convex teeth on the outer periphery. The tooth tip diameter of the drive wheel 32 in this embodiment is 260 mm. The crawler belt 35 rotates around the driving wheel 32 by hooking the teeth.

  The crawler belt 35 is wound around the drive wheel 32, the driven wheel 34, and the wheel 33, and is driven to rotate by the drive wheel 32 that receives the power of the travel motor 31, so that the self-propelled mower 1 can travel. it can. As shown in FIG. 2, the crawler belt 35 has a shape in which each corner is rounded with an unequal triangular shape having the longest upper side, and the second longest side is grounded.

  Here, the correlation among the heights of the rotation axes of the main body frame 20, the drive wheel 32, the driven wheel 34, and the wheel 33 will be described. The rotation shaft of the drive wheel 32 is positioned higher than the main body frame 20, and the rotation shaft of the driven wheel 34 and the wheel 33 is positioned lower than the main body frame 20. Accordingly, the main body frame 20 can be traveled across the weeds after cutting by being provided at the waist height, and does not drag the ground weeds. Further, even if the vehicle travels on a rough road with large unevenness, it can travel smoothly without hitting the main body frame 20.

  Guard members 36 are provided in the vicinity of the inside of the crawler belt 35 provided on the left and right sides in the traveling direction on the main body frame 20 side. The guard member 36 is a plate-like member, and is fixed to the guide plate 21 with the normal of the plate surface directed in a direction orthogonal to the traveling direction. Both end portions and lower end portions of the guard member 36 in the front-rear direction are set to be the same as the inner peripheral surface of the crawler belt 35 or larger outward than the inner peripheral surface. That is, the inside of the crawler belt 35 below the main body frame 20 is covered with the guard member 36. In this embodiment, the clearance between the guard member 36 and the crawler belt 35 in the lateral direction is set to 5 to 15 mm, and the difference in height between the end surface of the guard member 36 and the inner peripheral surface of the crawler belt 35 in the vertical direction is It is provided on the outer peripheral side of the 5 to 10 mm crawler belt 35. The guard member 36 covers the driving wheel 32, the rolling wheel 33, and the driven wheel 34 exposed below the main body frame 20, and does not hinder the crawler belt 35 from being rotated.

  The guard member 36 can prevent the soil and grass on the ground and the grass after cutting from being caught in the rotation of the driving wheel 32, the driven wheel 34 and the rolling wheel 33 or sticking to the outer peripheral portion. Further, since no foreign matter is caught in the driving wheel 32, the driven wheel 34 and the wheel 33, the traveling motor 31 is not overloaded. Furthermore, the winding of grass around the outer periphery of the drive wheel 32, the driven wheel 34, and the roller wheel 33 can be prevented, so that the tension of the crawler belt 35 can be made constant, and the traveling motor 31 can be driven stably.

  The working unit 4 is positioned in front of the main body unit 2 and the traveling unit 3 in the traveling direction. The working unit 4 includes a lifting arm 41 that allows the working unit 4 to be connected to the main body unit 2 to be lifted and lowered, a lifting actuator 42 that lifts and lowers the working unit 4, a cutting blade housing 43 that is attached to the front of the lifting arm 41, And a cutting blade portion 5 disposed in the blade housing 43.

The elevating arm 41 is an H-shaped member to which a beam member 41a is fixed so as to connect the central portions of the arm members arranged in the front-rear direction to the left and right of the traveling direction. The beam member 41a is a mounting portion for an elevating actuator 42 described later. At the rear part of the lifting arm 41, fulcrum 41b for turning in the vertical direction is provided on each of the left and right sides in the traveling direction. The elevating arm 41 is attached to a fulcrum support portion 41c fixed to the upper part on each of the left and right end portions in the traveling direction of the second square pipe 20b, and can be pivoted up and down. The fulcrum support portion 41c is a U-shaped member in plan view, and the opening of the U-shaped portion is directed forward.

  An elevating actuator 42 is provided to drive the elevating arm 41 to swing in the vertical direction. The lift actuator 42 has one end supported on the upper part of the first square pipe 20a and the other end attached to the lower surface of the beam member 41a. The elevating arm 41 is driven to pivot up and down about the fulcrum 41b by the elevating actuator 42.

  An attachment member 41e for attaching the cutting blade housing 43 is fixed to the front end of the elevating arm 41 in the traveling direction. The attachment member 41e is formed by bending a rectangular plate into a crank shape, with the convex portion of the crank facing upward. A cutting blade housing 43 is attached to the lower surface of the attachment member 41e.

  The cutting blade housing 43 has a shape in which a rectangular plate arranged horizontally is rounded at the corner on the rear side in the traveling direction. Further, a plate-like side cover 43a is fixed to the lower surface of the end portion of the cutting blade housing 43 that extends from the left and right side surfaces in the traveling direction to the rounded corners of the rear portion. A central portion on the rear side of the side cover 43a is opened to form an opening 43b. The width in the direction orthogonal to the traveling direction of the opening 43b is substantially the same as or narrower than the width between the two crawler belts 35 provided on the left and right of the main body 2. Therefore, the entire front surface on the lower surface side of the cutting blade housing 43 and a part on the rear side are opened. The lower end of the side cover 43a has a gap with the ground surface. The opening 43b is cut by the cutting blade portion 5 located at the lower portion of the cutting blade housing 43, and discharges grass guided rearward on the inner surface of the side cover 43a to the rear. Since the upper surface portion of the cutting blade housing 43 is set to a height equal to or lower than the height of the main body frame 20, the grass is discharged smoothly to the rear side without interfering with the main body frame 20.

  A dustproof cover 43c is further attached to the outer surface of the side cover 43a, and the lower end of the dustproof cover 43c is close to the ground. The dust-proof cover 43c has flexibility, and the lower end follows the uneven ground while bending, and the gap with the ground is made as small as possible, so that it is cut by a cutting blade portion 5 described later. Do not blow cuts and dust around.

  A rear cover 43d is provided in the opening 43b located at the rear portion of the cutting blade housing 43 so as to cover the opened portion. The rear cover 43d is a rectangular flexible cover having one end fixed to the rear end of the cutting blade housing 43, and the other end is suspended downward so as to move freely. . Due to the arrangement of the rear cover 43d, when a harvested product cut by the cutting blade portion 5 described later is discharged backward from the opening 43b, it hits the rear cover 43d and attenuates the discharging speed. The rear cover 43d does not hinder the flow of the harvested product from the opening 43b to the rear, and prevents the harvested product from scattering. The height of the cutting blade housing 43 is set to the same height as the lower surface of the main body frame 20 or a lower height, and does not hinder the flow of the harvested matter discharged from the opening 43b.

  A front guard 43 e is disposed in the front portion of the cutting blade housing 43. The front guard 43e is a rectangular flexible cover having a rectangular shape, one end of which is fixed to the front end of the cutting blade housing 43, and the other end is suspended downward so as to move freely. The front guard 43e prevents the cuttings from scattering forward in the traveling direction. The lower end portion of the front guard 43e is wound in a curl shape to suppress the front guard 43e from swinging back and forth, thereby improving the scattering prevention performance of the scattered matter.

  One or more cutting blade portions 5 are attached to the lower surface of the cutting blade housing 43. In this embodiment, two cutting blade portions 5 are arranged. The cutting blade unit 5 includes a cutting blade motor 51, a motor case 52 that promotes heat dissipation of the cutting blade motor 51 and protects the cutting blade motor 51, a cutting blade 53 that is rotationally driven by the cutting blade motor 51, and cuts grass. The cutting blade base 54 that is the mounting base of the cutting blade 53, the coupling 55 that transmits the rotation of the cutting blade motor 51 to the cutting blade base 54, and the distance between the cutting blade 53 and the ground located below the cutting blade base 54. A grounding body 56 that is kept constant.

  One or more cutting blade motors 51 are positioned below the cutting blade housing 43, and the output shaft 51a is disposed downward. In addition, the output shaft 51a side of the cutting blade motor 51 is provided with a mounting flange portion 51b having a flat mounting surface. The cutting blade motor 51 has an attachment flange 51b attached to a motor case 52 and fixed thereto.

  The motor case 52 is a stepped cylindrical member, and the cylindrical portion is directed in the vertical direction. The cylinder part of the motor case 52 is provided with a larger diameter at the upper part than at the lower part. The upper surface of the stepped portion on the inner diameter side of the motor case 52 is provided flat, and forms a motor mounting surface 52 a that is a mounting portion of the cutting blade motor 51. The motor mounting surface 52 a is fixed in contact with the mounting flange portion 51 b of the cutting blade motor 51. Further, a flange 52b for fixing to the cutting blade housing 43 is provided on the outer periphery of the cylinder portion in the upper part of the motor case 52. The flange 52 b is fixed to the lower surface of the cutting blade housing 43. That is, the cutting blade motor 51 is not directly attached to the cutting blade housing 43 but is provided separately from the cutting blade housing 43. The position of the cutting blade motor 51 is fixed with respect to the cutting blade housing 43 through the motor case 52. The cutting blade motor 51 that is positioned below the cutting blade housing 43 and separated from the cutting blade housing 43 is not directly illuminated by direct sunlight, and thus can prevent a temperature rise due to direct sunlight.

The motor case 52 is made of metal, and heat generated by the cutting blade motor 51 is transferred from the mounting flange portion 51 b to the motor mounting surface 52 a and radiated from the entire outer peripheral surface of the motor case 52. In this embodiment, the motor case 52 uses a light metal made of aluminum to enhance heat transfer. Since the mounting flange portion 51b and the motor mounting surface 52a are fixed in contact with each other, the heat generated from the cutting blade motor 51 is easily transferred to the motor case 52.
The cutting blade motor 51 urged to radiate heat by the motor case 52 can stably rotate the output shaft 51a without excessively raising the temperature. Further, since airflow is generated by the rotation of the cutting blade 53 described later, the heat radiated from the motor case 52 is released to the outside of the cutting blade housing 43 by the airflow. Furthermore, since the motor case 52 covers the entire cutting blade motor 51, the cutting blade motor 51 can be protected from scattered objects and obstacles.

  A cylindrical coupling 55 is attached to the output shaft 51a. The coupling 55 is located in the cylinder on the lower side of the motor case 52. A cutting blade base 54 is attached to the lower part of the coupling 55 to transmit the output rotational power of the cutting blade motor 51.

The cutting blade base 54 is a plate material, and a plurality of cutting blades 53 are rotatably attached to the outer peripheral portion at equal intervals. In this embodiment, the cutting blade base 54 is rectangular and the number of cutting blades 53 attached to the cutting blade base 54 is four. The cutting blade 53 rotates the rotational power generated by the cutting blade motor 51 around the rotation shaft of the output shaft 51 a via the coupling 55 and the cutting blade base 54, and cuts grass that has entered the working unit 4. The grass after cutting is discharged from the opening 43b behind the cutting blade housing 43.
A grounding body 56 is attached to the lower part of the cutting blade base 54. The grounding body 56 keeps the distance between the ground and the cutting blade 53 constant, and prevents the cutting blade 53 from contacting the ground.

  A battery 6 and a control unit 7 are installed on the main body frame 20. The battery 7 is a power source that operates the traveling motor 31, the cutting blade motor 51, and the control unit 7. The power source of the battery 7 is distributed to the traveling motor 31 and the cutting blade motor 51 via the control unit 7 connected to a power cable (not shown). The control unit 7 receives a signal from a transmitter 8 to be described later by a receiving unit (not shown) provided in the control unit 7, and based on the received signal data, the control unit 7 uses the traveling motor 31 and the cutting blade motor 51. Controls the output speed. The transmitter 8 is a device for remotely operating the self-propelled mower 1. The operator operates the lever and switch (not shown) provided on the transmitter 8 to drive the traveling motor 31 and the cutting blade motor 51 from the place where the operator is far away from the self-propelled mower 1. It is possible to mow the grass by traveling in the intended direction and speed.

  An operation using the self-propelled mower 1 of the present invention will be described. The self-propelled mower 1 operated by the operator using the transmitter 8 moves down the working unit 4 by the elevating actuator 42 and then moves forward on the traveling unit 3 driven by the traveling motor 31. The grass is cut by the rotation of the cutting blade 53. The cutting blade motor 51, which is driven to rotate the cutting blade 53 and is attached to the motor case 52 having heat conductivity, releases heat generated during driving to the outside through the motor case 52. Further, since the airflow is generated and released to the outside by the rotation of the cutting blade 53, the hot air does not go into the cutting blade housing 43. The cutting blade motor 51 urged to dissipate heat becomes hot and is not damaged.

  The harvested product cut by the cutting blade 53 is discharged from the opening 43 b and is blown to the lower side of the main body 2. Further, the harvested matter discharged from the opening 43b may be discharged after passing through the inner periphery of the side cover 43a. The cuttings discharged from the opening 43b are reduced in speed by the collision with the rear cover 43d, and then are blown to the lower side of the main body 2 located behind the working unit 4. The cuts that have been blown to the lower part of the main body 2 are guided backward without being caught by the guide plate 21 provided at the lower part of the main body 2. In addition, the cut material discharged from the opening 43 b is guided rearward by the guard member 36 provided in the traveling unit 3 without going to the driving wheel 32, the rolling wheel 33, and the driven wheel 34. The guard member 36 prevents foreign matter from being wound or entangled around the driving wheel 32, the rolling wheel 33, and the driven wheel 34. Further, by keeping the tension of the crawler belt 35 constant, the axial load of the traveling motor 31 is not excessively increased, and an overload to the traveling motor 31 can be prevented. The cuttings pass between the traveling units 3 provided on the left and right of the traveling direction below the main body unit 2 and are collected at the center of the self-propelled mower 1 to perform the cutting operation. After the work is completed, the work unit 4 is raised by the lift actuator 42 to finish the work.

  With the self-propelled mower 1 configured as described above, abnormal loads and abnormal heat generation of the traveling motor 31 and the cutting blade motor 51 can be prevented, and grass cutting work can be efficiently performed continuously for a long time.

  Although the present invention has been described according to the above-described embodiments, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. Modifications to the embodiments, examples, and operation techniques based on this disclosure are obvious to those skilled in the art.

DESCRIPTION OF SYMBOLS 1 Self-propelled mower 2 Main part 20 Main body frame 21 Guide plate 3 Traveling part 30 Traveling frame 31 Traveling motor 36 Guard member 4 Working part 41 Lifting arm 43 Cutting blade housing 43b Opening part 43d Rear cover 5 Cutting blade part 51 Cutting blade Motor 52 Motor case 53 Cutting blade

Claims (7)

The main body,
A traveling unit having a traveling motor that is provided on the left and right sides of the main body in the traveling direction, and that drives driving;
A working part for working, located in front of the main body part and the traveling part,
The working unit includes a plurality of cutting blades for cutting grass,
A cutting blade housing which covers a part of the upper side and side surface of the cutting blade;
A cutting blade motor located on the lower surface side of the cutting blade housing for driving the cutting blade to rotate;
A self-propelled mower characterized by having The cutting blade motor is provided so as to cover the cutting blade motor, protects the cutting blade motor, dissipates heat from the cutting blade motor, and is attached to the lower surface of the cutting blade housing;
The self-propelled mower according to claim 1, further comprising: The motor case is a material made of metal,
The self-propelled mower according to claim 2. A guide plate that is provided on the lower surface of the main body and guides the grass after cutting to the lower portion of the main body and the rear of the main body;
The traveling portion is provided on a side surface portion on the inner side of the traveling portion, and a guard member that prevents entry of foreign matter into the traveling portion;
The self-propelled mower according to claim 1, further comprising: The cutting blade housing has an open portion in which a part of the rear surface is opened,
A rear guard provided on the rear side of the opening,
The self-propelled mower according to claim 1, further comprising: The operation of the traveling of the traveling unit and the mowing work in the working unit, a wireless controller for operation by an operator,
The self-propelled mower according to claim 1, further comprising: A battery mounted on the upper portion of the main body and serving as a power source for the travel motor;
The self-propelled mower according to claim 1, further comprising:

Images