JP7318994B2 - work machine - Google Patents

Description

The present invention relates to working machines. In particular, it relates to a work machine provided with a member that protects the oil filler opening of the chain case.

When using agricultural work machines such as rotary work machines and puddling machines in fields surrounded by barriers such as ridges and walls made of soil or concrete, when working or moving near the barriers The side edges may inadvertently contact the barrier. A chain case containing a power transmission mechanism (chain unit) to which power for rotating a tillage rotor or the like is transmitted is sometimes arranged on a side end surface of the work machine. A surface of the chain case is sometimes provided with an oil filler port for supplying oil for the power transmission mechanism. In some cases, the oil filler port for supplying oil is provided on the side surface of the work machine, or the oil filler port protrudes in the shape of a circular mound so as to facilitate the oil supply operation. Further, the fuel filler port is often provided with a detachable cap made of an elastic member such as rubber.

In such a case, when the surface of the chain case arranged on the side end surface of the working machine comes into contact with the barrier, especially the oil filler opening provided on the surface of the chain case comes into contact with the barrier and is fitted in the oil filler opening. There was a problem that the cap may come off and be lost.

In order to prevent the side end face 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 laterally outer side of the working machine. Techniques for providing members are described.

JP 2012-70704 A

However, the technique described in Patent Document 1 aims to protect the entire members positioned on the side end surfaces of the work machine, so that the guard member is positioned further forward and backward and left and right than the members positioned on the side end surfaces of the work machine. Since it protrudes in the direction, there is a problem that the size of the entire work machine becomes large. Also, in the technique described in Patent Document 1, a member such as a bracket for attaching the guard member to the work machine is separately required. Therefore, there is a problem that the number of parts increases and the manufacturing cost increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a working machine having a simple structure, which suppresses an increase in the number of parts, and which is equipped with a filler guard member for protecting the filler hole particularly on the surface of the chain case. The challenge is to

A working machine according to one embodiment of the present invention includes a working body connected to a rear part of a traveling body, a chain case provided on a side end surface of the working body and containing a chain unit for transmitting power to the working body, a cap detachably attached to an oil 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 that protrudes to the side of the body, the guard member having a longitudinal direction in the traveling direction of the traveling machine body.

Further, the protective member is divided into a plurality of members, and the guard member is provided on a member of the plurality of members which is arranged relatively close to the cap in the longitudinal direction of the chain case. may be

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

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

Further, the guard member may have a curved surface such that the height protruding to the side of the working object is higher at the central side and lower at both end sides 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, an existing member is used to suppress an increase in the number of parts, and a simple structure provides a chain case, particularly an oil filler opening guard member that protects the oil filler opening provided in the chain case. can be provided.

1 is a perspective view showing a configuration of a working machine in an unfolded state according to one embodiment of the present invention; FIG. 1 is a perspective view showing a configuration of a working machine in an embodiment of the present invention in which a left working body is folded; FIG. 1 is a front view of a chain case provided in a working machine according to one embodiment of the present invention; FIG. (A) is a top view of a protective member for a chain case provided in the work machine according to one embodiment of the present invention. (B) is a front view of a protective member for a chain case provided in the working machine according to one embodiment of the present invention. (C) is a side view of a protective member for a chain case provided in the working machine according to one embodiment of the present invention. FIG. 4 is a diagram showing a state in which a guard member of the working machine abuts against a barrier in one embodiment of the present invention; 1 is a front view of a chain case provided in a working machine according to one embodiment of the present invention; FIG. (A) is a top view of a second protective member of a chain case provided in the working machine in one embodiment of the present invention. (B) is a front view of a second protective member of the chain case provided in the working machine in one embodiment of the present invention. (C) is a side view of the second protective member of the chain case provided in the working machine in one embodiment of the present invention. FIG. 4 is a diagram showing a state in which a guard member of the working machine abuts against a barrier in one embodiment of the present invention;

An embodiment of a work machine of the present invention will be described below with reference to the drawings. However, the work machine of the present invention can be embodied in many different modes, and should not be construed as being limited to the description of the examples shown below.

In the drawings referred to in this embodiment, the same parts or parts having similar functions are denoted by the same reference numerals 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 attached.

In the specification and claims of the present application, "up" indicates the direction away from the field vertically, and "down" indicates the direction vertically toward the field. "Front" indicates the direction in which the traveling machine body is positioned with respect to the working machine, and "rear" indicates the direction opposite to the front by 180 degrees. Also, "left" indicates the left when the traveling machine body faces the direction in which the working machine is positioned as a reference, and "right" indicates the direction opposite to the left by 180 degrees.

<First Embodiment>
[Configuration of work machine 10]
The configuration of the working machine 10 according to the first embodiment will be described in detail below with reference to FIGS. 1 and 2. FIG. FIG. 1 is a perspective view showing the construction of a working machine according to the 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. Since FIG. 2 is a diagram in which only the position of the left working body 10L is changed from that of FIG. 1, some of the reference numerals already mentioned 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, including a central working body 10C, a left working body 10L and a right working body 10R. The central working body 10C is arranged in the central portion of the working machine 10 and functions as a working machine main body. The left working body 10L and the right working body 10R are attached to both left and right ends of the central working body 10C so as to be vertically rotatable. By rotating the left working body 10L and the right working body 10R obliquely upward, the working machine 10 can be folded over the central working body 10C. can be expanded.

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

Next, the central working body 10C will be described. The central working body 10C includes a top mast 12 and a lower link connecting part 14 which function as connecting parts with a traveling machine body such as a tractor, an input shaft 16 to which power is transmitted from the traveling machine body, and a laterally extending supporting central working body 10C. supporting frame 18C, side plate 19C, central chain case 20C, chain unit (not shown) built in central chain case 20C, gearbox 22, central shield cover 24C, tillage rotor (not shown), first central It comprises a leveling body 28C, a second central 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 working body 10C, and the lower link connecting portions 14 are provided at two locations on the front left and right sides of the central working 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 a top link (not shown) of the traveling machine body and lower links (three-point link hitch mechanisms) provided at two locations on the left and right, respectively. is attached to the rear part of the traveling body so that it can be raised and lowered. The work implement 10 and the traveling machine body may be connected via an automatic hitch frame attached to the three-point link hitch mechanism of the traveling machine body.

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

The support frame 18C also serves as the body frame of the central working body 10C, and extends in the left-right direction with respect to the traveling direction of the traveling body on both the left and right sides of the gear box 22 . Here, a transmission shaft (not shown) is installed inside the support frame 18C arranged between the gearbox 22 and the central chain case 20C. This transmission shaft transmits power for rotating the tillage 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 stretched between them, and has a function of transmitting power between two shafts. The rotary shaft of the tillage rotor and the transmission shaft inside the support frame 18C are each supported by side plates 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 to the side plate 19C.

The chain unit is used for power transmission between the two axes of the transmission shaft and the rotary shaft of the tillage rotor. Note that the chain case 20C is a cover member for protecting the chain unit.

A central shield cover 24C is provided along the support frame 18 and arranged to cover the top of the tillage rotor. The soil crushed by the tillage rotor collides with the inner wall of the central shield cover 24C to be further crushed, and falls back to the field. In this way, the central shield cover 24C has both the function of preventing scattering of the soil picked up by the tillage rotor and the function of crushing the soil.

The tillage rotor of the central working body 10C has a configuration in which a plurality of tillage tines are attached to a rotating shaft (not shown) rotatably supported under the central shield cover 24C using a flange or a holder. have. The power input from the input shaft 16 is speed-changed 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 rotary motion of the tillage rotor. be done.

The first central leveling body 28C is rotatably attached to the central shield cover 24C and is generally called an apron. The second central leveling body 30C is attached to the first center leveling body 28C so as to be vertically rotatable, and is usually called a leveler. The first central leveling body 28C serves as a cover for returning mud and soil scattered by the rotation of the tillage rotor of the central working body 10C back to the field, and also serves as a ground leveling member that performs leveling work by pressing the second central leveling body 30C against the field. play a role as The second central 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 leveling body 28C, and function as means for controlling the vertical rotation of the first central leveling body 28C. The apron control mechanisms 31a and 31b have a pressurization mode that prevents the upward rotation of the first central ground leveling body 28C and a non-pressurization mode that does not hinder the upward rotation of the first central ground leveling body 28C. It is switchable, and in the pressurization mode, it exerts a biasing force that prevents the first central leveling body 28C from rotating upward. This urging force is realized by the reaction force of springs arranged on the link rods constituting the apron control mechanisms 31a and 31b. By setting the apron control mechanisms 31a and 31b to the pressurizing mode, it is possible to improve the soil crushing performance and the ground leveling performance of the first central leveling body 28C, and to finish the field more efficiently.

The central leveler control mechanism 32C is installed between the central shield cover 24C and the second central leveling body 30C, and functions as means for controlling the vertical rotation of the second central leveling body 30C. The central leveler control mechanism 32C has a soil leveling mode in which the second central leveling body 30C is fixed in a state in which it is oriented downward (a soiling state) and a leveling mode in which the second central leveling body 30C is not prevented from rotating in the vertical direction. Switchable. Mode switching is realized by restricting or releasing the operation of the link rods that constitute the central leveler control mechanism 32C.

Next, the left working body 10L will be described. The left working body 10L includes a left shield cover 24L, a tillage rotor 26L (see FIG. 2) arranged below the left shield cover 24L, a support frame 18L, a side plate 19L, and a chain unit arranged inside the left 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 extended ground leveling body rotating mechanism 34L. The roles of 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 those of the corresponding elements in the central working body 10C. Therefore, the description here is omitted.

Here, as shown in FIG. 2, the tillage rotor 26L includes a rotary shaft 26La and a plurality of tillage tines 26Lb arranged around the rotary shaft 26La via holders. When the rotating shaft 26La rotates by power transmitted through the chain unit in the left chain case 20L, the tillage tines 26Lb arranged around it rotate all at once, crushing and agitating 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 construction as the tilling rotor 26L.

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

Here, in the present embodiment, the left extended ground leveling member rotating mechanism 34L includes a drive motor portion 34La, a rotating arm 34Lb, and a connecting wire 34Lc. The rotating arm 34Lb has one end connected to the driving motor portion 34La and the other end connected to the connecting wire 34Lc. One end of the connecting wire 34Lc is connected to the rotating arm 34Lb, and the other end is connected to the left extended ground leveling body 36L.

When the driving motor portion 34La operates, a rotational driving force is generated, and the rotating arm 34Lb rotates in a substantially horizontal direction. In conjunction with the rotation of the rotating arm 34Lb, the left extended ground leveling body 36L pulled by the connecting wire 34Lc rotates via the extended ground leveling body connecting portion 38L. As a result, the left extended ground leveling body 36L can be stored and deployed.

In the present embodiment, an example in which the left extended ground leveling body rotating mechanism 34L is composed of the drive motor section 34La, the rotating arm 34Lb, and the connection wire 34Lc is shown. Any other mechanism may be used as long as it allows the extension ground leveling body 36L to rotate.

Next, the right working body 10R will be described. The right working body 10R includes a right shield cover 24R, a tillage rotor (not shown) arranged below the right shield cover 24R, a support frame 18R, a side plate 19R, a right chain case 20R, a first right leveling body 28R, a second 2, a right side leveling body 30R, a right side leveler control mechanism 32R, and a right side extension leveling body turning mechanism 34R. Here, the right shield cover 24R, the chain unit (not shown) arranged 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 extended leveling body The roles played by the body rotation mechanism 34R are the same as those of the corresponding elements in the left working body 10L described above, and thus descriptions thereof are omitted here. The right extended ground leveling body 36R and the extended ground leveling body connecting portion 38R are the same as the left extended ground leveling body 36L and the extended ground leveling body connecting part 38L.

Further, the working machine 10 according to the present embodiment includes the central shovel plates 40Ca and 40Cb, the left shovel plate 40L, and the right shovel plate 40R for the central working body 10C, the left working body 10L, and the right working body 10R, respectively. . These are boards for controlling the flow of water (actually, the flow of water containing soil) generated during puddling work, and by providing these mulching boards, the finish of the field surface can be improved.

For example, the central mulching plates 40Ca and 40Cb are provided at a position to return soil to ruts such as tires of a traveling machine traveling in front of the working machine 10, and contribute to flattening the undulations of the field caused by the ruts. In addition, the left side shovel board 40L and the right side shovel board 40R draw in the surrounding water flow to the back side of each shovel board while gathering soil inward. As a result, even if straw or the like floats outside the ends of the left working body 10L and the right working body 10R, it is pulled into the respective tillage rotors by the water flow, contributing to the improvement of 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 for the left side working body 10L and the right side working body 10R, respectively. Like the central leveler control mechanism 32C, the left leveler control mechanism 32L and the right leveler control mechanism 32R are means for restricting or releasing the vertical rotation of the second left leveling body 30L and the second right leveling body 30R, respectively. function as

The left working body 10L and the right working body 10R described above are rotated by the action of the rotating cylinders 46a and 46b through the working body rotating mechanisms 44a and 44b provided at both ends of the central working body 10C. is stored or deployed. At that time, the first central ground leveling body 28C and the first left ground leveling body 28L, and the first center grounding body 28C and the first right ground leveling body 28R are connected by first connecting portions 48a and 48b, respectively. The second center leveling body 30C and the second left side leveling body 30L, and the second center leveling body 30C and the second right side leveling body 30R are connected by the second connecting parts 50a and 50b, respectively.

In the present specification and the scope of claims, the collective term for the left working body 10L and the right working body 10R may be referred to as a "side working body". Also, the collective term for the first left leveling body 28L and the first right side leveling body 28R is called the "first side leveling body", and the collective term for the second left side leveling body 30L and the second right side leveling body 30R is It may be called a "second side ground leveling body".

[Configuration of chain case]
As shown in FIG. 1, in the working machine 10 according to the present embodiment, a right chain case 20R is arranged on the right side end surface of the working machine 10 when the left and right side working bodies are unfolded for work. A left chain case 20</b>L is arranged on the left side end surface of 10 . When the working machine 10 in the state shown in FIG. 1 is used in a field surrounded by barriers such as ridges and walls made of soil, concrete, etc., the worker may accidentally come into contact with the barriers when performing work or movement near the barriers. The left and right chain cases 20L and 20R arranged on both side end surfaces of the working machine 10 are likely to cause damage.

As shown in FIG. 2, the working machine 10 according to this 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 the left working body 10L is folded to work or move near a barrier, the central chain case 20C arranged on the left end face of the working machine 10 shown in FIG. There is a risk of contact with the barrier without

However, since work and movement within a field are usually performed in the unfolded state shown in FIG. 1, the left and right chain cases 20L and 20R arranged on both side end faces of the work implement 10 in the unfolded state will be described below. . However, the application of the present invention is not limited to the left and right chain cases 20L, 20R arranged on both side end surfaces of the working machine 10 in the unfolded state. It can be applied to general chain cases that can be placed in positions where there is a risk of

FIG. 3 is a front view of a chain case provided in the working machine according to one embodiment of the present invention. In this specification, the "front surface" of the chain case refers to the surface shown in FIGS. 3 and 6 among the surfaces of the chain case. The same applies hereinafter. FIG. 3 shows the configuration of the left and right chain cases 20L, 20R arranged on both side 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 has a chain case main body 60, a protective member 70, and a cap 90. As shown in FIG. The chain case main body 60 incorporates a chain unit (not shown) that is a power transmission mechanism for transmitting power to the tillage rotor and the like, and the inside of the chain case main body 60 is filled with oil. The chain case main body 60 has a hill-shaped portion 60a protruding slightly above the front, and an oil filler port (not shown) for supplying oil to a position corresponding to the top of the hill-shaped portion 60a. ) are provided. A detachable cap 90 is fitted to the fuel filler port. The cap 90 of the fuel filler port may be made of an elastic member such as rubber in order to prevent oil leakage and to be detachable. The fuel filler cap 90 may also have a handle 90a for easy removal of the cap.

Further, as shown in FIG. 3, the lower portion of the chain case main body 60 is covered with a protective member 70. As shown in FIG. The protective member 70 may cover the lower part of the chain case in the longitudinal direction. The protective member 70 may be, for example, a chain case shoe for protecting the lower portion of the chain case main body 60 from external impact. The protective member 70 is provided at the end of the left chain case 20L that contacts the field during work. Since the lower part of the chain case main 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 protective member 70 protects the chain case main body 60 from impact and wear caused by earth and sand. be.

The protective member 70 of the working machine 10 according to this embodiment has 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 machine body. The guard member 75 may be manufactured separately from the protective member 70 and then fixed by a method such as welding or adhesion, but the present invention is not limited to this. may be formed.

The chain case body 60 of the work machine 10 according to this embodiment is connected to the work machine 10 by fastening means such as bolts 62 . The protection member 70 of the work machine 10 according to the present embodiment is arranged so as to overlap the lower part of the chain case body 60 and is connected to the work machine 10 together with the chain case body 60 by fastening means such as bolts 62 . Also, the protection member 70 exposes the cap 90 of the oil filler port arranged above the center of the chain case main body 60 .

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

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

The surface of the guard member 75 facing the curved surface may be fixed to the protective member 70 in its entirety, but is not limited to this. The surface facing the curved surface of may be a curved surface curved with the same curvature as the surface contacting the barrier. In particular, when the guard member 75 is formed in a flat plate shape having a curved surface with a substantially uniform width, manufacturing loss can be reduced and the guard member 75 can be mass-produced with good material efficiency. In this case, the guard member 75 and the protective 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 the connection strength is ensured.

[Action of guard member]
FIG. 5 shows a state in which the guard member 75 of the working machine 10 according to this embodiment contacts the barrier (W). FIG. 5 is a diagram showing a state in which the left chain case 20L provided on the left end face of the left working body 10L abuts against the barrier (W) when the left working body 10L of the working machine 10 is deployed.

As shown in FIG. 5, the guard member 75 provided on the protection member 70 is the only member of the left chain case 20L that contacts the barrier (W). That is, the guard member 75 is the member that protrudes most to the left side among the members constituting the left chain case 20L. At least, the guard member 75 needs to protrude to the side of the working body 10 beyond the oil filler cap 90 provided in the chain case main body 60 . In the example shown in FIG. 5 , the guard member 75 protrudes to the left side of the working body 10 beyond the handle 90 a of the oil filler cap 90 provided on the hill-shaped portion 60 a of the chain case body 60 .

An oil filler cap 90 provided on the chain case main body 60 is provided on the surface of the chain case and is exposed from the protective member 70 for the convenience of the oil supply operation. If the protective member 70 were not provided with the guard member 75, in the situation shown in FIG. The cap 90 formed by .theta. In order to prevent such an inconvenience, this embodiment provides a guard member 75 having a height that protrudes to the side of the working body 10 from the oil filler cap 90 provided in the chain case main body 60 . .

As shown in FIG. 5, in the case of a barrier (W) having a side surface substantially perpendicular to the field, the height of the guard member 75 projecting to the side of the working body 10 is equal to the hill portion 60a of the chain case body 60. If the cap 90 is larger than the cap 90 of the filler port provided in the , the cap 90 does not contact the side surface of the barrier (W) because the guard member 75 contacts the side surface of the barrier (W). can be protected.

Moreover, unlike FIG. 5, there is also a ridge-shaped barrier having side surfaces that widen toward the outside of the field as the distance from the surface of the field increases. In this case, the portion of the barrier that protrudes most toward the inside of the field in the height direction is the lower portion of the barrier. In the work machine 10 of the present embodiment, the guard member 75 is provided on the protection member 70 arranged below the cap 90 (field side). When protruding to the side, the guard member 75 abuts on the lower side surface of the barrier so that the cap 90 does not abut on the side surface of the barrier (W), so that the cap 90 can be protected.

Also, in the present embodiment, the guard member 75 is provided substantially parallel to the direction orthogonal 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 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 the present embodiment, the hill-shaped portion 60a of the chain case body 60 is provided with the oil filler port and the cap 90, but the present invention is not limited to this. The oil 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, the guard member 75 contacts the barrier, so that of the chain case 20 provided on the side end surface of the working machine 10, particularly the oil filler cap 90 comes into contact with the barrier in the field. can prevent it from coming off. Also, since the guard member 75 is provided on the protective member 70 that protects the lower portion of the chain case 20, it can be easily implemented by improving existing parts without increasing the number of parts. In addition, since the guard member 75 has a longitudinal direction equal to or less than the width of the protective member 70 and the chain case main body 60, there is no possibility that the overall size of the work machine will increase unexpectedly, and a compact design is possible. In addition, since the guard member 75 is a flat plate-shaped member fixed to the surface of the protective member 70, there is no fear that an obstacle is involved or entangled inadvertently.

<Second embodiment>
[Configuration of chain case]
The chain cases 20L' and 20R' according to the present embodiment differ from the chain cases 20L and 20R according to the first embodiment in that the protective member 80 is divided into a first protective member 81 and a second protective member 82. . In this embodiment, the guard member 85 is provided on the second protection member 82 that is arranged relatively close to the cap 90 of the filler port. Since other configurations are the same as those of the first embodiment, redundant description is omitted.

FIG. 6 is a front view of a chain case provided in the working machine according to one embodiment of the present invention. As shown in FIG. 6, the left chain case 20L' has a chain case main body 60, a protective member 80, and a cap 90. As shown in FIG. The protective member 80 in this embodiment is arranged adjacent to a first protective member 81 covering the lowest part of the chain case main body 60 and above the first protective member 81 to cover the lower part of the chain case main body 60 from the center. It is divided into the second protection member 82 and the second protection member 82 . The first protective member 81 may be, for example, a chain case shoe for protecting the lower portion of the chain case main 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 work. 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 wear due to sand and the like. Body 60 is protected. Also, both the first protective member 81 and the second protective member 82 constituting the protective member 80 expose the cap 90 of the filler port arranged above the center of the chain case main body 60 .

The chain case main body 60 has a hill-shaped portion 60a protruding slightly above the front surface, and an oil filler port ( not shown) are provided. A detachable cap 90 is fitted to the fuel filler port, and the cap 90 of the fuel filler port may be formed with a handle 90a for easy removal of the cap.

The second protection member 82 in this embodiment has a guard member 85 . In the present embodiment, the position where the guard member 85 is provided is preferably below the position where the fuel filler cap 90 is provided and below the center of the chain case 20 in the longitudinal direction of the chain case 20 . . However, if the guard member 85 is arranged 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. The purpose of protecting the cap 90 by 85 may not be fully achieved. Therefore, in the present embodiment, the guard member 85 is not the first protective member 81 arranged near the lower end in the longitudinal direction of the chain case 20, but the second protective member covering the chain case main body 60 below the center thereof. 82.

In this way, when the protective member 80 is divided into a plurality of members, the guard member 85 is properly positioned so that the guard member 85 is arranged at an appropriate position below the center of the chain case main body 60 . By providing the guard member 85 on such a 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. 7A is a top view of the second protection member 82. FIG. (B) is a front view of the second protection member 82. FIG. (C) is a side view of the second protection member 82. FIG. As shown in FIG. 7 , the second protection member 82 has a shape corresponding to the outer shape of the chain case body 60 . As shown in FIG. 7A, the longitudinal length of the guard member 85 provided on the second protective member 82 is equal to or slightly shorter than the width of the second protective member 82 and the chain case main body 60. It is. In addition, as shown in FIG. 7A, the guard member 85 protrudes from the left end surface of the working body 10, which is the surface of the left chain case 20L', so that the central side in the longitudinal direction of the guard member 85 is higher. , and may be formed to have a curved surface that gradually becomes slightly lower on both end sides. In addition, a plurality of fastening holes 84 into which bolts are inserted when attaching the second protection member 82 to the left chain case 20</b>L′ and the working machine 10 are formed in the lateral edge portion.

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

As shown in FIG. 7A, the guard member 85 is formed in a flat plate shape having a substantially uniform width and having a curved surface with a similar curvature on the surface facing the curved surface in contact with the barrier. may In this way, when the guard member 85 is formed in a flat plate shape having a substantially uniform width, it is possible to mass-produce the guard member 85 with less manufacturing loss and material efficiency when forming a curved surface to contact the barrier. 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 in the longitudinal direction of the guard member 85 as long as the connection strength is ensured. .

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

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

If the second protective member 82 were 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 out of the filler opening and pop off due to the impact caused by the contact. In order to prevent such an inconvenience, this embodiment provides a guard member 85 having a height that protrudes to the side of the working body 10 from the oil filler cap 90 provided in the chain case main body 60 . .

As described above, in the working machine 10 of the present embodiment, the guard member 85 contacts the barrier, so that the oil filler cap 90 of the chain case 20 provided on the side end surface of the working machine 10 in particular comes into contact with the barrier in the field. can prevent it from coming off. In addition, since the guard member 85 is provided on one of the members constituting the protective member 80 that protects the lower portion of the chain case 20, it can be easily implemented by improving existing parts without increasing the number of parts. be able to. In addition, since the guard member 85 has a longitudinal direction equal to or smaller than the width of the second protection member 82 and the chain case main body 60, there is no possibility that the overall size of the working machine will increase unnecessarily, and a compact design is possible. . In addition, since the guard member 85 is a flat plate-shaped member fixed to the surface of the second protection member 82, there is no fear that an obstacle is involved or entangled inadvertently. Furthermore, in the working machine 10 of the present embodiment, the protective member 80 is divided into a plurality of members, so that the relative position of the guard member 85 in the longitudinal direction of the chain case 20 can be adjusted.

As described above, the present invention has been described with reference to the drawings, but the present invention is not limited to the above embodiments, and can be modified as appropriate without departing from the scope of the present invention. For example, based on the tillage tines of each embodiment and the method of determining wear thereof, those skilled in the art can add, delete, or change the design of components as appropriate, as long as they are within the gist of the present invention. Included in the scope. Furthermore, the embodiments described above can be appropriately combined as long as there is no contradiction, and technical matters common to each embodiment are included in each embodiment without explicit description.

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

10: working machine, 10C, 10L, 10R: working body, 20C, 20L, 20R: chain case, 26C, 26L, 26R: tillage rotor, 60: chain case main body, 60a: hill-shaped portion, 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 (6)

a working body connected to the rear part of the traveling body;
a chain case provided on the side end surface of the working body and containing a chain unit for transmitting power to the working body;
a cap detachably attached to a fuel filler port provided on the side of the chain case;
a protective member that covers the end and sides of the chain case on the field side during work;
a guard member connected to the protection member and protruding from the protection member to the side of the working body beyond the cap;
The guard member has a longitudinal direction in the traveling direction of the traveling machine body,
A working machine , wherein the longitudinal length of the guard member is equal to or less than the width of the chain case . a working body connected to the rear part of the traveling body;
a chain case provided on the side end surface of the working body and containing a chain unit for transmitting power to the working body;
a cap detachably attached to a fuel filler port provided on the side of the chain case;
a first protection member that covers the end of the chain case on the field side during work;
a second protection member disposed closer to the cap than the first protection member and covering the side of the chain case;
a guard member connected to the second protection member and projecting from the second protection member to the side of the working body beyond the cap;
The guard member has a longitudinal direction in the traveling direction of the traveling machine body,
A working machine , wherein the longitudinal length of the guard member is equal to or less than the width of the chain case . a working body connected to the rear part of the traveling body;
a chain case provided on the side end surface of the working body and containing a chain unit for transmitting power to the working body;
a cap detachably attached to a fuel filler port provided on the side of the chain case;
a protective member that covers the end and sides of the chain case on the field side during work;
a guard member connected to the protection member and protruding from the protection member to the side of the working object beyond the cap;
The guard member has a longitudinal direction in the traveling direction of the traveling machine body,
The work machine, wherein the guard member has a flat plate shape with a substantially uniform width. a working body connected to the rear part of the traveling body;
a chain case provided on the side end surface of the working body and containing a chain unit for transmitting power to the working body;
a cap detachably attached to a fuel filler port provided on the side of the chain case;
a first protection member that covers the end of the chain case on the field side during work;
a second protection member disposed closer to the cap than the first protection member and covering the 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 working body beyond the cap;
The guard member has a longitudinal direction in the traveling direction of the traveling machine body,
The work machine, wherein the guard member has a flat plate shape with a substantially uniform width. The working machine according to any one of claims 1 to 4 , wherein the guard member is arranged closer to the agricultural field than the center of the chain case. 5. The guard member according to any one of claims 1 to 4 , wherein the guard member has a curved surface such that a height protruding to the side of the working body is higher in the longitudinal direction of the guard member at the central side and lower at both end sides. Work machine as described.

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