JP7449618B2 - work equipment - Google Patents

Description

The present invention relates to a working machine. In particular, the present invention relates to a working machine that includes a member that protects a fuel filler port of a chain case.

When using agricultural machines such as rotary machines and puddling machines in fields surrounded by barriers such as ridges or walls made of soil or concrete, be careful not to turn the machine when working or moving near the barrier. The side edges may unintentionally touch the barrier. A chain case incorporating a power transmission mechanism (chain unit) to which power for rotating a tilling rotor or the like is transmitted is sometimes disposed on a side end surface of the working machine. An oil filler port for supplying oil to the power transmission mechanism is sometimes arranged on the surface of the chain case. A fuel filler port for supplying oil may be provided on the side surface of the working machine, or may protrude in the shape of a cone to facilitate refueling work. Further, the fuel filler port is often provided with a removable cap made of an elastic member such as rubber.

In such a case, if the surface of the chain case placed on the side end surface of the work equipment comes into contact with the barrier, the oil filler port provided on the surface of the chain case will come into contact with the barrier, causing damage to the oil filler hole that is fitted into the oil filler hole. There was a problem that the cap could come off and be lost.

In order to prevent the side end surface of the working machine from coming into contact with the barrier, for example, Patent Document 1 discloses a guard formed by a rod-shaped member at a position corresponding to the upper part of the concrete ridge on the outer side of the working machine in the left-right direction. Techniques for providing members are described.

Japanese Patent Application Publication No. 2012-70704

However, since the technology described in Patent Document 1 aims to protect the entire member located on the side end surface of the working machine, the guard member is more longitudinally and laterally than the member located on the side end face of the working machine. Since the guard member protrudes in the direction, there is a problem that the size of the entire working machine increases.Furthermore, the technique described in Patent Document 1 requires a separate member such as a bracket for attaching the guard member to the working machine. Therefore, there was a problem that the number of parts increased and the manufacturing cost increased.

The present invention has been made in view of the above problems, and provides a working machine that suppresses an increase in the number of parts, has a simple structure, and is equipped with a fuel filler port guard member for protecting the fuel filler port on the surface of the chain case. That is the issue.

A working machine according to an embodiment of the present invention includes: a working body connected to a rear part of a traveling machine body; a chain case provided on a side end surface of the working body and incorporating a chain unit for transmitting power to the working body; a cap that is removably attached to a fuel filler port provided on the surface of the chain case; a protective member that covers the end of the chain case on the field side during work; and a guard member protruding laterally of the body, the guard member having a longitudinal length in the traveling direction of the traveling aircraft body.

Further, the protection member is divided into a plurality of members, and the guard member is provided on a member relatively disposed near the cap in the longitudinal direction of the chain case, among the plurality of members. It's okay to be hit.

Further, the length of the guard member in the longitudinal direction may be equal to or less than the width of the chain case.

Further, the guard member may be arranged closer to the field than the center of the chain case.

Further, the guard member may have a curved surface that projects laterally of the work body such that the height of the guard member is higher at the center and lower at both ends in the longitudinal direction of the guard member.

Further, the guard member may have a flat plate shape having a substantially uniform width.

According to the present invention, by using existing members, an increase in the number of parts is suppressed, and with a simple structure, a work machine equipped with a fuel filler port guard member that protects a chain case, particularly a fuel filler port provided in the chain case. can be provided.

FIG. 1 is a perspective view showing the configuration of a work machine in an expanded state in an embodiment of the present invention. FIG. 2 is a perspective view showing the configuration of the working machine in an embodiment of the present invention in a state where the left side working body is folded. FIG. 2 is a front view of a chain case included in a working machine in an embodiment of the present invention. (A) is a top view of a protection member for a chain case provided in a working machine in an embodiment of the present invention. (B) is a front view of a protection member of a chain case provided in a work machine in one embodiment of the present invention. (C) is a side view of a protection member for a chain case provided in a work machine in an embodiment of the present invention. FIG. 3 is a diagram showing a state in which a guard member of a work machine in one embodiment of the present invention is in contact with a barrier. FIG. 2 is a front view of a chain case included in a working machine in an embodiment of the present invention. (A) is a top view of the second protection member of the chain case provided in the work machine in one embodiment of the present invention. (B) is a front view of the second protection member of the chain case provided in the work machine in one embodiment of the present invention. (C) is a side view of the second protection member of the chain case provided in the work machine in one embodiment of the present invention. FIG. 3 is a diagram showing a state in which a guard member of a work machine in one embodiment of the present invention is in contact with a barrier.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a working machine of the present invention will be described with reference to the drawings. However, the working machine of the present invention can be implemented in many different embodiments, and should not be interpreted as being limited to the contents described in the examples shown below.

Note that in the drawings referred to in this embodiment, the same parts or parts having similar functions are denoted by the same or similar symbols, and repeated description thereof may be omitted. For example, when the working machine of the present invention is composed of three working bodies, a central working body, a left working body, and a right working body, the number is followed by "C" to indicate that each working body has a part. ”, “L” and “R” may be added.

In the specification and claims of the present application, "above" indicates a direction vertically away from the field, and "bottom" indicates a direction vertically toward the field. Further, "front" indicates the direction in which the traveling body is located with respect to the working machine, and "rear" indicates the direction 180° opposite to the front. Further, "left" indicates the left when facing the direction in which the traveling body is located with the working machine as a reference, and "right" indicates the direction 180° opposite to the left.

<First embodiment>
[Configuration of work machine 10]
Hereinafter, the configuration of the work machine 10 according to the first embodiment will be described in detail using FIGS. 1 and 2. FIG. 1 is a perspective view showing the configuration of a working machine according to a first embodiment of the present invention. FIG. 2 is a perspective view showing the configuration of the working machine according to the first embodiment of the present invention when the left working body is folded. Note that, since FIG. 2 is a diagram in which only the position of the left work body 10L has been changed from that in FIG. 1, some of the symbols already shown in FIG. 1 are omitted for convenience of explanation.

As shown in FIG. 1, the working machine 10 according to the present embodiment has a structure divided into three parts, including a central working body 10C, a left working body 10L, and a right working body 10R. The central work body 10C is arranged at the center of the work machine 10 and functions as a work machine main body. The left side work body 10L and the right side work body 10R are attached to both left and right ends of the central work body 10C so as to be rotatable in the vertical direction. The work machine 10 can be folded by rotating the left side work body 10L and the right side work body 10R diagonally upward to overlap the central work body 10C, and by rotating the left side work body 10L and right side work body 10R diagonally downward, as shown in FIG. Can be expanded.

Here, the state in which the left side work body 10L and the right side work body 10R are overlapped and folded on the central work body 10C is called a stored state. The stored state is a state in which the width of the working machine 10 in a direction orthogonal to the traveling direction of the traveling machine body is reduced. Further, a state in which the left side work body 10L, right side work body 10R, and center work body 10C are arranged side by side is called a deployed state. The deployed state is a state in which the working machine 10 is extended in a direction perpendicular to the traveling direction of the traveling machine body.

Next, the central work body 10C will be explained. The central work body 10C includes a top mast 12 and a lower link connecting portion 14 that function as a connection to a traveling body such as a tractor, an input shaft 16 to which power is transmitted from the traveling body, and an input shaft 16 that extends in the left-right direction and supports the central work body 10C. Support frame 18C, side plate 19C, central chain case 20C, central chain case 20
Chain unit (not shown) built in C, gear box 22, central shield cover 24C, tilling rotor (not shown), first central earth leveling body 28C, second central earth leveling body 30C, apron control mechanisms 31a and 31b , and a central leveler control mechanism 32C.

The top mast 12 is provided at the front central portion of the central work body 10C, and the lower link connecting portions 14 are provided at two locations on the left and right front of the central work body 10C. The top mast 12 and the lower link connecting portions 14 provided at two locations on the left and right are connected to the top link and lower links (three-point link hitch mechanism) provided at two locations on the left and right of a traveling machine (not shown), respectively, and the work equipment 10 is attached to the rear of the traveling aircraft so that it can be raised and lowered. Note that the working machine 10 and the traveling machine body may be connected through an autohitch frame attached to a three-point link hitch mechanism of the traveling machine body.

The input shaft 16 is provided in a gear box 22 provided at the front central portion of the central work body 10C, and inputs the power transmitted from the traveling machine body to the work machine 10. The input shaft 16 is connected to a PTO shaft of the traveling aircraft, and power is transmitted from the PTO shaft via a universal joint or the like.

The support frame 18C also serves as the main body frame of the central work body 10C, and is provided on both left and right sides of the gear box 22 to extend in the left-right direction with respect to the traveling direction of the traveling body. Here, a transmission shaft (not shown) is installed inside the support frame 18C disposed between the gear box 22 and the central chain case 20C. This transmission shaft transmits power for rotating the tilling rotor from the gear box 22 to a chain unit (not shown) inside the central chain case 20C.

Here, the chain unit is a mechanism composed of a pair of sprockets and a roller chain spanned between them, and has a function of transmitting power between two shafts. The rotation shaft of the tilling rotor and the transmission shaft inside the support frame 18C are each supported by a side plate 19C connected to the support frame 18C. The side plate 19C is also called a chain case plate because the chain case 20C is attached thereto.

The chain unit is used to transmit power between the two shafts, the transmission shaft and the rotation shaft of the tilling rotor. Note that the chain case 20C is a cover member for protecting the chain unit.

The central shield cover 24C is provided along the support frame 18 and is arranged to cover the top of the tilling rotor. The soil crushed by the tilling rotor hits the inner wall of the central shield cover 24C and is further crushed, and then falls and returns to the field. In this way, the central shield cover 24C has both the function of preventing scattering of soil rolled up by the tilling rotor and the function of crushing soil.

The tilling rotor of the central work body 10C has a configuration in which a plurality of tilling claws are attached using flanges or holders to a rotating shaft (not shown) rotatably supported below the central shield cover 24C. have The power input from the input shaft 16 is changed in speed within the gear box 22, transmitted via the transmission shaft within the support frame 18, the chain unit within the central chain case 20C, etc., and converted into rotational motion of the tilling rotor. be done.

The first central ground leveling body 28C is rotatably attached to the central shield cover 24C, and is usually called an apron. The second central earth leveling body 30C is attached to the first central earth leveling body 28C so as to be rotatable in the vertical direction, and is usually called a leveler. The first central land leveling body 28C serves as a cover for returning mud and soil scattered by the rotation of the tilling rotor of the central work body 10C to the field, and is a land leveling member that performs land leveling work by pressing the second central leveling body 30C against the field. to fulfill the role of The second central ground leveling body 30C plays a role as a ground leveling member that levels the surface of the field by directly contacting the field.

The apron control mechanisms 31a and 31b are installed between the central shield cover 24C and the first central earth leveling body 28C, and function as means for controlling vertical rotation of the first central earth leveling body 28C. The apron control mechanisms 31a and 31b have a pressurizing mode that prevents the upward rotation of the first central ground leveling body 28C, and a non-pressure mode that does not prevent the upward rotation of the first central leveling body 28C. It is switchable, and in the pressurizing mode, a biasing force that prevents upward rotation is exerted on the first central leveling body 28C. This biasing force is realized by the reaction force of springs arranged on link rods that constitute the apron control mechanisms 31a and 31b. By setting the apron control mechanisms 31a and 31b to the pressurizing mode, the soil crushing performance and soil leveling performance of the first central leveling body 28C can be improved, and the field can be finished more efficiently.

The central leveler control mechanism 32C is installed between the central shield cover 24C and the second central earth leveling body 30C, and functions as a means for controlling vertical rotation of the second central earth leveling body 30C. The central leveler control mechanism 32C has a grading mode in which the second central grading body 30C is fixed in a downwardly facing state (grading state) and a grading mode in which the vertical rotation of the second central grading body 30C is not hindered. Switchable. Mode switching is realized by regulating or canceling the operation of the link rod that constitutes the central leveler control mechanism 32C.

Next, the left side work body 10L will be explained. The left side work body 10L includes a left side shield cover 24L, a tilling rotor 26L (see FIG. 2) placed below the left side shield cover 24L, a support frame 18L, a side plate 19L, and a chain unit placed inside the left side chain case 20L. (not shown), a first left leveling body 28L, a second left leveling body 30L, a left leveler control mechanism 32L, and a left side extension leveling body rotation mechanism 34L. The roles played by the left shield cover 24L, the left chain case 20L, the first left leveling body 28L, the second left leveling body 30L, and the left leveler control mechanism 32L are the same as the corresponding elements in the central work body 10C described above. Therefore, the explanation here will be omitted.

Here, as shown in FIG. 2, the tilling rotor 26L includes a rotating shaft 26La and a plurality of tilling claws 26Lb arranged around the rotating shaft 26La via a holder. When the rotating shaft 26La is rotated by the power transmitted through the chain unit in the left chain case 20L, the tilling claws 26Lb arranged around it rotate all at once, crushing and stirring the soil in the field. Although not shown, the tilling rotors of the central working body 10C and the right working body 10R also have the same configuration as the tilling rotor 26L.

Returning to FIG. 1, the left side extension leveling body rotation mechanism 34L is a mechanism for rotating the left side extension leveling body 36L rotatably connected to the second left side leveling body 30L of the left side work body 10L. be. The left side extended ground leveling body 36L is provided extending from the end of the left side work body 10L to the left of the work machine 10, and is responsible for leveling work in the area outside the left side work body 10L. The second left side earth leveling body 30L and the left side extended land leveling body 36L are rotatably connected by an extended land leveling body connecting portion 38L, so that the left side extended land leveling body 36L is folded toward the second left side leveling body 30L. It is rotatable.

Here, in this embodiment, the left side extension leveling body rotation mechanism 34L includes a drive motor section 34La, a rotation arm 34Lb, and a connecting wire 34Lc. The rotating arm 34Lb has one end connected to the drive motor section 34La and the other end connected to the connecting wire 34Lc. Moreover, one end of the connecting wire 34Lc is connected to the rotating arm 34Lb, and the other end is connected to the left side extended ground leveling body 36L.

When the drive motor section 34La operates, a rotational driving force is generated, and the rotation arm 34Lb rotates in a substantially horizontal direction. In conjunction with the rotational movement of the rotation arm 34Lb, the left side extended earth leveling body 36L pulled by the connecting wire 34Lc rotates via the extended earth leveling body connection portion 38L. This makes it possible to store and deploy the left side extension leveling body 36L.

In addition, in this embodiment, an example was shown in which the left side extended earth leveling body rotation mechanism 34L is configured by the drive motor section 34La, the rotation arm 34Lb, and the connecting wire 34Lc, but the left side extended earth leveling body rotation mechanism 34L is Any other mechanism may be used as long as it allows the extended ground leveling body 36L to rotate.

Next, the right side work body 10R will be explained. The right side work body 10R includes a right side shield cover 24R, a tilling rotor (not shown) disposed below the right side shield cover 24R, a support frame 18R, a side plate 19R, a right side chain case 20R, a first right leveling body 28R, and a tilling rotor (not shown) arranged below the right side shield cover 24R. 2 Right side leveling body 30R, right leveler control mechanism 32R, and right side extension leveling body rotation mechanism 3
Equipped with 4R. Here, the right shield cover 24R, the chain unit (not shown) disposed inside the right chain case 20R, the first right leveling body 28R, the second right leveling body 30R, the right leveler control mechanism 32R, and the right side leveling extension The roles played by the body rotation mechanism 34R are the same as those of the corresponding elements in the left side work body 10L described above, so the explanation here will be omitted. Further, the right side extended land leveling body 36R and the extended land leveling body connecting portion 38R are the same as the left side extended leveling body 36L and the extended land leveling body connecting portion 38L described above.

Furthermore, the work machine 10 according to the present embodiment includes central mulching plates 40Ca and 40Cb, a left mulching plate 40L, and a right mulching plate 40R on the central working body 10C, left side working body 10L, and right side working body 10R, respectively. . These boards are used to control the flow of water (actually, the flow of water containing soil) that occurs during puddling work, and by providing these boards, the finish of the field surface can be improved.

For example, the central mulch plates 40Ca and 40Cb are provided at positions that return soil to the ruts of tires, etc. of a traveling machine running in front of the working machine 10, and contribute to flattening the undulations of the field caused by the ruts. Further, the left side mulch plate 40L and the right side mulch plate 40R move soil inward, and draw water flow around the back side of each mulch plate. As a result, even if straw or the like is floating outside the ends of the left side working body 10L and right side working body 10R, it is drawn into the respective tilling rotors by the water flow, contributing to improving the finish of the field surface.

Further, the working machine 10 according to the present embodiment includes a left leveler control mechanism 32L and a right leveler control mechanism 32R on the left side work body 10L and the right side work body 10R, respectively. These left side leveler control mechanism 32L and right side leveler control mechanism 32R are means for regulating or canceling the vertical rotation of the second left side leveling body 30L and the second right side leveling body 30R, respectively, similarly to the central leveler control mechanism 32C. functions as

The left side work body 10L and right side work body 10R described above are rotated by the action of rotation cylinders 46a and 46b via work body rotation mechanisms 44a and 44b provided at both ends of the central work body 10C, and It will be in the stowed state or unfolded state. At this time, the first central earth leveling body 28C and the first left side leveling body 28L, and the first central leveling body 28C and the first right side leveling body 28R are connected by first connecting portions 48a and 48b, respectively. Further, the second central earth leveling body 30C and the second left side earth leveling body 30L, and the second central earth leveling body 30C and the second right side earth leveling body 30R are connected by second connecting portions 50a and 50b, respectively.

In this specification and claims, the left side work body 10L and the right side work body 10R may be collectively referred to as a "side work body." In addition, the combination of the first left leveling body 28L and the first right side leveling body 28R is collectively referred to as the "first side leveling body", and the combination of the second left side leveling body 30L and the second right side leveling body 30R is also collectively referred to as the "first side leveling body". It is sometimes called the "second lateral leveling body."

[Chain case configuration]
As shown in FIG. 1, when the work machine 10 according to the present embodiment performs work by deploying the left and right side work bodies, the right chain case 20R is disposed on the right side end surface of the work machine 10, and the work machine A left chain case 20L is disposed on the left side end surface of the chain case 10. If the work equipment 10 in the state shown in Fig. 1 is used in a field surrounded by barriers such as ridges or walls formed of soil or concrete, it may come into contact with the barrier unintentionally when working or moving near the barrier. The members that are likely to cause this are the left and right chain cases 20L and 20R, which are placed on both end surfaces of the working machine 10.

Note that, as shown in FIG. 2, the working machine 10 according to the present embodiment has a central chain case 20C between the central working body 10C and the left working body 10L. As shown in FIG. 2, when working near a barrier or moving with the left side work body 10L folded, the central chain case 20C disposed on the left end surface of the work machine 10 shown in FIG. Otherwise, there is a risk of contact with the barrier.

However, since work and movement within the field are usually performed in the unfolded state shown in FIG. 1, the left and right chain cases 20L and 20R, which are arranged on both end surfaces of the working machine 10 in the unfolded state, will be explained below. . However, the application of the present invention is not limited to the left and right chain cases 20L and 20R disposed on both side end surfaces of the working machine 10 in the unfolded state, but also to the left and right chain cases 20L and 20R, which unintentionally come into contact with a barrier, such as the central chain case 20C. This is applicable to chain cases in general that can be placed in positions where there is a risk of damage.

FIG. 3 is a front view of a chain case included in a working machine according to an embodiment of the present invention. In this specification, the "front" of the chain case refers to the surface shown in FIGS. 3 and 6 among the surfaces of the chain case. The same applies hereafter. FIG. 3 shows the configuration of left and right chain cases 20L and 20R arranged on both end surfaces of the working machine 10 in the unfolded state. Since the left chain case 20L and the right chain case 20R have the same configuration, the left chain case 20L will be described below unless otherwise specified.

As shown in FIG. 3, the left chain case 20L includes a chain case main body 60, a protection member 70, and a cap 90. The chain case body 60 incorporates a chain unit (not shown) that is a power transmission mechanism for transmitting power to a tilling rotor, etc., and the inside of the chain case body 60 is filled with oil. The chain case main body 60 has a hill-shaped portion 60a projecting slightly upward from the front, and a refueling port (not shown) for supplying oil at a position corresponding to the top of the hill-shaped portion 60a. ) is provided. Further, a removable cap 90 is fitted to the fuel filler port. The oil filler cap 90 may be made of an elastic member such as rubber in order to prevent oil leakage and to be detachable. Further, the fuel filler cap 90 may have a handle 90a to facilitate removal of the cap.

Further, as shown in FIG. 3, the lower part of the chain case body 60 is covered with a protection member 70. The protection member 70 may cover the chain case below the center in the longitudinal direction. The protective member 70 may be, for example, a chain case shoe for protecting the lower part of the chain case body 60 from external impact. The protection member 70 is provided at the end of the left chain case 20L on the side that contacts the field during work. Since the lower part of the chain case body 60 is covered by the protective member 70, even if the lower part of the left chain case 20L comes into contact with the field during work, the chain case body 60 is protected from impact and abrasion caused by earth and sand, etc. Ru.

The protection member 70 of the working machine 10 according to this embodiment includes a guard member 75. As shown in FIG. 3, the guard member 75 may be formed in a flat plate shape having a longitudinal direction in the traveling direction of the traveling aircraft body. The guard member 75 may be manufactured separately from the protection member 70 and then fixed by a method such as welding or adhesion, but the invention is not limited to this. may be formed.

The chain case body 60 of the working machine 10 according to this embodiment is connected to the working machine 10 by a fastening means such as a bolt 62. Further, the protection member 70 of the working machine 10 according to the present embodiment is arranged to overlap the lower part of the chain case main body 60, and is connected to the working machine 10 together with the chain case main body 60 by fastening means such as bolts 62. Furthermore, the protection member 70 exposes a cap 90 of a fuel filler port located above the center of the chain case body 60.

FIG. 4 is a diagram showing the protection member 70 of the working machine 10 according to this embodiment. In FIG. 4, (A) is a top view of the protection member 70. (B) is a front view of the protection member 70. (C) is a side view of the protection member 70. As shown in FIG. 4, the protection member 70 has a shape corresponding to the external shape of the chain case body 60. As shown in FIG. 4A, the length of the guard member 75 provided on the protection member 70 in the longitudinal direction is equal to or slightly shorter than the width of the protection member 70 and the chain case body 60. Further, as shown in FIG. 4A, the height of the guard member 75 protruding from the left end surface of the work body 10, which is the surface of the left chain case 20L, is higher on the center side in the longitudinal direction of the guard member 75. It may be configured to have a curved surface that gradually becomes slightly lower on both end sides. Furthermore, a plurality of fastening holes 72 are formed in the lower peripheral edge of the protection member 70 into which bolts are inserted when attaching to the chain case 20 and the working machine 10.

When the guard member 75 has such a curved surface, the impact when the guard member 75 contacts the barrier can be alleviated. Moreover, it is also possible to prevent the guard member 75 itself from being damaged when it comes into contact with the barrier.

The entire surface of the guard member 75 facing the curved surface may be fixed to the protection member 70, but is not limited to this, and as shown in FIG. 4(A), the guard member 75 The surface opposite to the curved surface of may be a curved surface curved with the same curvature as the surface that abuts the barrier. In particular, when the guard member 75 is formed in a flat plate shape with a curved surface having a substantially uniform width, manufacturing loss is reduced and the guard member 75 can be mass-produced with material efficiency. In this case, the guard member 75 and the protection member 70 may be fixed by a method such as partially welding both ends of the guard member 75 in the longitudinal direction as long as connection strength is ensured.

[Function of guard member]
FIG. 5 shows a state in which the guard member 75 of the working machine 10 in this embodiment comes into contact with the barrier (W). FIG. 5 is a diagram showing a state in which the left side chain case 20L provided on the left end surface of the left side work body 10L of the work machine 10 is in contact with the barrier (W) when the left side work body 10L of the work machine 10 is unfolded.

As shown in FIG. 5, the only member of the left chain case 20L that comes into contact with the barrier (W) is the guard member 75 provided on the protection member 70. That is, the guard member 75 is the member that protrudes most leftward among the members that constitute the left chain case 20L. At least, the guard member 75 needs to protrude further to the side of the work body 10 than the fuel filler cap 90 provided on the chain case body 60. In the example shown in FIG. 5, the guard member 75 protrudes to the left side of the work body 10 beyond the handle 90a of the fuel filler cap 90 provided on the hill-shaped portion 60a of the chain case main body 60.

A fuel filler cap 90 provided on the chain case body 60 is provided on the surface of the chain case and is exposed from the protection member 70 for convenience of refueling work. If the protection member 70 is not provided with the guard member 75, in the situation shown in FIG. 5, the fuel filler cap 90 provided on the surface of the chain case will contact the barrier (W), and the The cap 90 formed by the above may come off and pop off from the fuel filler port due to the impact caused by contact. In order to prevent such inconvenience, the present embodiment provides a guard member 75 having a height that protrudes to the side of the work body 10 relative to the fuel filler cap 90 provided on the chain case body 60. .

As shown in FIG. 5, in the case of the barrier (W) having a side surface substantially perpendicular to the field, the height of the guard member 75 protruding to the side of the work body 10 is the height of the hill-shaped portion 60a of the chain case body 60. If the cap 90 is larger than the cap 90 of the fuel filler provided in the tank, the guard member 75 will come into contact with the side of the barrier (W), and the cap 90 will not come into contact with the side of the barrier (W). can be protected.

Moreover, unlike FIG. 5, there is also a ridge-shaped barrier having side surfaces that widen at the base and slope toward the outside of the field as the distance from the field surface increases. In this case, the part of the barrier that protrudes furthest into the field in the height direction is the lower part of the barrier. In the work machine 10 of this embodiment, the guard member 75 is provided on the protection member 70 which is disposed below the cap 90 (on the field side), so the guard member 75 is more secure than the cap 90. When protruding laterally, the cap 90 can be protected because the guard member 75 comes into contact with the lower side surface of the barrier and the cap 90 does not come into contact with the side surface of the barrier (W).

Further, in this embodiment, the guard member 75 is provided substantially parallel to the direction perpendicular to the longitudinal direction of the chain case 20, but the present invention is not limited to this. As long as the guard member 75 has a longitudinal direction in the traveling direction of the traveling machine body, the guard member 75 may be provided slightly inclined with respect to the direction orthogonal to the longitudinal direction of the chain case 20.

Further, in this embodiment, the oil filler port and the cap 90 are provided on the hill-shaped portion 60a of the chain case main body 60, but the present invention is not limited to this. The fuel filler port and cap 90 may be provided on the surface of the chain case body 60 at a uniform height.

As described above, in the working machine 10 of the present embodiment, when the guard member 75 comes into contact with the barrier, the oil filler cap 90 in particular of the chain case 20 provided on the side end surface of the working machine 10 comes into contact with the barrier in the field. You can prevent it from coming off. Moreover, since the guard member 75 is provided on the protection member 70 that protects the lower part of the chain case 20, it can be easily implemented by improving existing parts without increasing the number of parts. Moreover, since the guard member 75 has a longitudinal direction that is equal to or less than the width of the protection member 70 and the chain case main body 60, there is no fear that the overall size of the work machine will become unnecessarily large, and a compact design is possible. Further, since the guard member 75 is a flat plate-shaped member fixed to the surface of the protection member 70, there is no risk of the guard member 75 inadvertently getting caught in or getting tangled with an obstacle.

<Second embodiment>
[Chain case configuration]
The chain cases 20L' and 20R' according to the present embodiment are different from the chain cases 20L and 20R according to the first embodiment in that the protection member 80 is divided into a first protection member 81 and a second protection member 82. . In this embodiment, the guard member 85 is provided on the second protection member 82 that is placed relatively close to the cap 90 of the fuel filler port. Since the other configurations are the same as those in the first embodiment, duplicate explanations will be omitted.

FIG. 6 is a front view of a chain case included in a working machine according to an embodiment of the present invention. As shown in FIG. 6, the left chain case 20L' includes a chain case main body 60, a protection member 80, and a cap 90. The protection member 80 in this embodiment is arranged above and adjacent to a first protection member 81 that covers the lowest part of the chain case main body 60 and covers the lower side of the chain case main body 60 from the center. It is divided into a second protection member 82. The first protection member 81 may be, for example, a chain case shoe for protecting the lower part of the chain case body 60 from external impact and wear. The first protection member 81 is provided at the end of the left chain case 20L' that contacts the field during operation. Since the lower part of the chain case main body 60 is covered by the first protective member 81, even if the lower part of the left chain case 20L' comes into contact with the field during work, the first protective member 81 protects the chain case from impact and abrasion caused by earth and sand. The main body 60 is protected. Further, the first protection member 81 and the second protection member 82 that constitute the protection member 80 both expose the cap 90 of the fuel filler port, which is disposed above the center of the chain case body 60.

The chain case main body 60 also has a hill-shaped portion 60a projecting slightly upward from the front, and an oil filler port (for supplying oil) at a position corresponding to the top of the hill-shaped portion 60a. (not shown) is provided. Further, a removable cap 90 is fitted to the fuel filler port, and a handle 90a may be formed on the fuel filler cap 90 to facilitate removal of the cap.

The second protection member 82 in this embodiment includes a guard member 85. In this embodiment, the position where the guard member 85 is provided is preferably below the position where the fuel filler cap 90 is provided in the longitudinal direction of the chain case 20, and below the center of the chain case 20. . However, if the guard member 85 is disposed near the lower end in the longitudinal direction of the chain case 20, the distance between the position where the cap 90 is provided and the position where the guard member 85 is provided becomes large, so the guard member 85 may not sufficiently achieve the purpose of protecting the cap 90. Therefore, in the present embodiment, the guard member 85 is not the first protection member 81 disposed near the lower end of the chain case 20 in the longitudinal direction, but the second protection member 85 that covers the chain case body 60 from the center downward. 82.

In this way, when the protection member 80 is divided into a plurality of members, the guard member 85 is appropriately arranged so that the guard member 85 is disposed at an appropriate position below the center of the chain case body 60. By providing the guard member 85 on a suitable member, the position where the guard member 85 is formed can be adjusted.

FIG. 7 is a diagram showing the second protection member 82 in this embodiment. In FIG. 7, (A) is a top view of the second protection member 82. (B) is a front view of the second protection member 82. (C) is a side view of the second protection member 82. As shown in FIG. 7, the second protection member 82 has a shape corresponding to the external shape of the chain case body 60. As shown in FIG. 7A, the length in the longitudinal direction of the guard member 85 provided on the second protection member 82 is equal to or slightly shorter than the width of the second protection member 82 and the chain case body 60. It is. Further, as shown in FIG. 7A, the height of the guard member 85 protruding from the left end surface of the work body 10, which is the surface of the left chain case 20L', is higher on the center side in the longitudinal direction of the guard member 85. , it may be formed to have a curved surface that gradually becomes slightly lower on both end sides. Further, a plurality of fastening holes 84 are formed in the side edges of the second protection member 82, into which bolts are inserted when attaching to the left chain case 20L' and the working machine 10.

When the guard member 85 has such a curved surface, the impact when the guard member 85 contacts the barrier can be alleviated. Furthermore, it is also possible to prevent the guard member 85 itself from being damaged when it comes into contact with the barrier.

As shown in FIG. 7A, the guard member 85 is formed in a flat plate shape with a substantially uniform width, and the surface opposite to the curved surface that contacts the barrier also has a curved surface curved with a similar curvature. It's okay. In this way, when the guard member 85 is formed in a flat plate shape having a substantially uniform width, the guard member 85 can be mass-produced with less manufacturing loss and material efficiency when the surface that contacts the barrier is formed as a curved surface. Can be done. In this case, the guard member 85 and the second protection member 82 may be fixed by a method such as partially welding both ends of the guard member 85 in the longitudinal direction as long as connection strength is ensured. .

[Function of guard member]
FIG. 8 shows a state in which the guard member 85 in this embodiment comes into contact with the barrier (W). FIG. 8 is a diagram showing a state in which the left chain case 20L' provided on the left side end surface of the left side work body 10L of the work machine 10 is in contact with the barrier (W) when the left side work body 10L is unfolded. .

As shown in FIG. 8, the only member of the left chain case 20L' that comes into contact with the barrier (W) is the guard member 85 provided on the second protection member 82. That is, the guard member 85 is the member that protrudes most leftward among the members that constitute the left chain case 20L'. At least, the guard member 85 needs to protrude to the side of the work body 10 more than the oil filler cap 90 provided on the chain case body 60. In the example shown in FIG. 8, the guard member 85 protrudes to the left side of the work body 10 beyond the handle 90a of the fuel filler cap 90 provided on the hill-shaped portion 60a of the chain case main body 60.

If the second protection member 82 is not provided with the guard member 85, in the situation shown in FIG. The cap 90, which is made of an elastic material such as rubber, may come off and pop off from the fuel filler port due to the impact caused by the contact. In order to prevent such inconvenience, the present embodiment provides a guard member 85 having a height that protrudes to the side of the work body 10 relative to the fuel filler cap 90 provided on the chain case body 60. .

As described above, in the work machine 10 of the present embodiment, the guard member 85 comes into contact with the barrier, so that, of the chain case 20 provided on the side end surface of the work machine 10, especially the fuel filler cap 90 comes into contact with the barrier in the field. You can prevent it from coming off. Furthermore, since the guard member 85 is provided as one of the members constituting the protection member 80 that protects the lower part of the chain case 20, it can be easily implemented by improving existing parts without increasing the number of parts. be able to. Further, since the guard member 85 has a longitudinal direction that is equal to or less than the width of the second protection member 82 and the chain case main body 60, there is no risk of the overall size of the work machine becoming unnecessarily large, and a compact design is possible. . Further, since the guard member 85 is a flat plate-shaped member fixed to the surface of the second protection member 82, there is no risk of the guard member 85 inadvertently getting caught in or getting tangled with an obstacle. Further, in the work machine 10 of the present embodiment, by dividing the protection member 80 into a plurality of members, the relative position of the guard member 85 in the longitudinal direction of the chain case 20 can be adjusted.

Although the present invention has been described above with reference to the drawings, the present invention is not limited to the above-described embodiments, and can be modified as appropriate without departing from the spirit of the present invention. For example, a structure in which a person skilled in the art appropriately adds, deletes, or changes the design based on the tilling claws and the wear evaluation method thereof according to each embodiment is still applicable to the present invention, as long as it has the gist of the present invention. Included in the range. Furthermore, the embodiments described above can be combined as appropriate as long as there is no mutual contradiction, and technical matters common to each embodiment are included in each embodiment even if not explicitly stated.

In addition, even if there are other effects different from those brought about by the aspects of each embodiment described above, those that are obvious from the description of this specification or that can be easily predicted by a person skilled in the art, It is naturally understood that this is brought about by the present invention.

10: Work equipment, 10C, 10L, 10R: Work body, 20C, 20L, 20R: Chain case, 26C, 26L, 26R: Tilling rotor, 60: Chain case body, 60a: Hill-shaped part, 62: Bolt, 70, 80: Protective member, 81: First protective member, 82: Second protective member, 75, 85: Guard member, 90: Cap, 90a: Handle, W
:barrier

Claims (4)

a work body connected to the rear of the traveling aircraft;
a chain case that is provided on a side end surface of the working body and includes a built-in chain unit that transmits power to the working body;
a cap removably provided on a fuel filler port provided on a side of the chain case;
A protective member that covers the field-side end and sides of the chain case during work;
a guard member connected to the protection member and protruding from the protection member to the side of the work body beyond the cap;
The guard member is a work machine having a longitudinal direction in the traveling direction of the traveling machine body. a work body connected to the rear of the traveling aircraft;
a chain case that is provided on a side end surface of the working body and includes a built-in chain unit that transmits power to the working body;
a cap removably provided on a fuel filler port provided on a side of the chain case;
A first protective member that covers the field side end of the chain case during work;
a second protection member disposed closer to the cap than the first protection member and covering a side of the chain case;
a guard member connected to the second protection member and protruding from the second protection member to the side of the work body beyond the cap;
The guard member is a work machine having a longitudinal direction in the traveling direction of the traveling machine body. The working machine according to claim 1 or 2, wherein the guard member is arranged closer to the field than the center of the chain case. The guard member has a curved surface such that the height protruding laterally of the work body is higher at the center and lower at both ends in the longitudinal direction of the guard member. work equipment.

Images