JP5536917B2 - Rotary work machine shield cover - Google Patents

Description

  The present invention relates to a shield cover that is attached to a rear portion of a tractor so as to be movable up and down and has a function of preventing adhesion of earth and sand that the work rotor jumps up.

  In a rotary working machine equipped with a working rotor having claws such as a plurality of tilling claws protruding around the rotary shaft, such as a tilling work machine, in order to prevent the earth and sand jumped up by the claws from reaching the working machine main body. The shield cover is fixed above the work rotor. The shield cover extends in the width direction of the work machine body around the gear box that receives power from the PTO shaft of the tractor, and is supported by a transmission frame that transmits power to the rotary shaft and a support frame that continues to the transmission frame across the gear box Is done.

  If the inner peripheral surface of the shield cover directly faces the rotary shaft, the earth and sand will adhere to the inner peripheral surface of the shield cover (the surface on the working rotor side), but the attached earth and sand will resist the resistance of the rotating claw. This causes a problem of lowering work efficiency. Therefore, in order to prevent the adhesion and accumulation of earth and sand to the inner peripheral surface of the shield cover, a plate for preventing earth and sand adhesion may be fixed to the inner peripheral surface of the shield cover (see Patent Document 1).

JP-A-11-9002 (Claim 1, paragraphs 0016 to 0018, FIG. 3)

  The adhesion destination of the earth and sand that the claw jumps up with the rotation of the rotary shaft is determined by the direction of rotation of the claw (rotary shaft). For example, the claw rotates from the front to the rear (down cut) with respect to the farm scene. In some cases, the nail scrapes the earth and sand from the front to the rear, so that the earth and sand tends to adhere to the rear side of the shield cover. When the apron is connected to the rear of the shield cover, it is more likely to adhere to the apron.

  When a rubber adhesion prevention plate, for example, is fixed to the inner peripheral surface of the shield cover as in Patent Document 1, the earth and sand adhering to the adhesion prevention plate is adhered to a certain extent due to vibration during traveling of the work machine. You can expect it to fall under its own weight.

  However, in Patent Document 1, since the adhesion prevention plate is fixed to the shield cover in the width direction, that is, on both sides in the circumferential direction of the shield cover (paragraph 0017), the adhesion prevention plate itself vibrates independently from the shield cover. Because it is hard to wake up, it is difficult to drop earth and sand effectively. Although the adhesion preventing plate can vibrate at an intermediate portion other than the fixed position, the degree of freedom of vibration is low because both sides are fixed.

  In particular, since the earth and sand do not vibrate in the adhesion preventing plate and tend to adhere to a fixed position by bolts or the like, the effect of removing the earth and sand by the adhesion preventing plate itself cannot be expected at the fixed position.

  From the above background, the present invention proposes a shield cover for a rotary working machine having a function of removing earth and sand adhering to the adhesion prevention plate itself, and particularly having a function of eliminating adhesion of earth and sand to the fixing position of the adhesion prevention plate. It is.

The shield cover according to the first aspect of the present invention is connected to the work rotor that is attached to the rear portion of the tractor and supported by the work machine body that travels with the tractor, the shield cover body that covers the work rotor, and the rear side in the traveling direction. In the rotary working machine comprising a seal cover having an apron covering the rear of the working rotor,
On the surface of the shield cover body on the working rotor side, one or more soil barriers having elasticity are fixed at a position on the upstream side in the rotational direction of the working rotor ,
One of the structural requirements is that one or more soil barriers having elasticity are fixed to the surface of the apron on the working rotor side at a position upstream in the rotational direction of the working rotor .

  The circumferential direction of the landslide material refers to the circumferential direction of the shield cover main body, and the circumferential direction one side of the landslide material is the rear side or the front side in the traveling direction of the work implement main body, and is closer to the end in the circumferential direction. It refers to any position in the section from the center position in the circumferential direction to the end, such as the position. One side in the circumferential direction of the earth protection material fixed to the apron also indicates the rear side or the front side in the traveling direction of the work implement body. In this case, the earthproof material fixed to the apron is basically fixed to the surface of the apron on the work rotor side so as to overlap the earthproof material of the shield cover body. The use of rubber is suitable for the earthproof material from the viewpoint of durability, but any material can be used as long as it has elasticity that can vibrate with the vibration of the working machine body, and metal, synthetic resin, etc. are also used.

  The earthproof material is detachably fixed to the shield cover main body and the apron by a fixing tool such as a bolt or a pin. Fixtures are placed at appropriate intervals in the length direction of the earth protection material (the length direction of the shield cover body or the width direction of the work equipment body), and the circumferential direction of the earth protection material (the circumference of the shield cover body). Basically, it is sufficient to arrange one place for (direction). There are cases where two or more fixing tools are arranged in the circumferential direction of the earth-proofing material, but it is reasonable to prevent the adhesion of earth and sand and to prevent the earth and sand from falling, as described later.

  Whether the earth retaining material is fixed to the shield cover body, etc. is the rear side or the front side of the work equipment body, if multiple earthproof materials are fixed to the shield cover body and apron. In addition, it is determined by the direction of rotation (down-cut rotation or up-cut rotation) of the claw fixed to the rotary shaft constituting the work rotor. In the case where a plurality of landslide materials are fixed, since the two landslide materials adjacent to each other in the circumferential direction of the landslide material can be arranged in a state of overlapping each other as described in claim 2, they overlap. It is because the fixed position can be covered (covered) from the work rotor by disposing the fixed position of the earth protection material in the portion.

  For example, when the claw rotates relative to the farm scene from the front to the rear in the traveling direction (down cut rotation), the earth and sand tends to adhere to the rear side of the shield cover as described above. In this case, as described in claim 3, of the two adjacent earth-proof materials, the earth-proof material located on the upstream side in the rotation direction of the work rotor is moved from the work rotor side. Since the upstream side earthproof material covers the downstream fixing position, the upstream side earthproofing material is positioned upstream so that the downstream side earthproofing material is fixed. It is possible to protect with.

  Conversely, when the nail rotates from the rear in the traveling direction to the front with respect to the farm scene (up cut rotation), the earth and sand tends to adhere to the front side of the shield cover. As described in the above, the earthproof material located upstream in the rotational direction of the work rotor is arranged so as to cover the earthproof material located downstream from the work rotor side, so that the The fixed position is covered with the upstream side earth-proofing material.

  Since the fixed position of the landslide material is a place where vibration does not occur even by its own vibration, the adhered earth and sand are unlikely to fall and the earth and sand are likely to accumulate. Therefore, the fixed position of the front side landslide material is covered by the rear side landslide material, or conversely, the fixed position of the rear side landslide material is covered by the front side landslide material, to the fixed position. It is possible to make it difficult for the earth and sand to adhere to itself. As a result, it is possible to obtain a state where it is not necessary to drop the earth and sand without expecting a drop due to vibration.

  Since the earthproof material is fixed at a position on one side in the circumferential direction, the other end side is in a free state, so the earthproof material vibrates freely in the radial direction of the work rotor with the fixed position as the fixed end. can do.

  Since the landslide material is fixed at one end in the circumferential direction and the other end is free, the amplitude at the time of vibration generated due to the vibration of the work implement body is maximized. The effect of inducing the fall is enhanced, and the effect of avoiding the adhesion and accumulation of earth and sand is obtained. Therefore, the earthproof material exhibits the effect of preventing the adhesion of earth and sand over the entire circumference of the earthproof material except for the fixed position. The earth and sand adhering to the earth removing material is dropped from the earth removing material not only by vibration of the earth removing material itself but also by scraping the claw rotating with the rotation of the rotary shaft.

  The invention according to claim 2 is the invention according to claim 1, wherein a plurality of earthproof materials are arranged adjacent to the shield cover main body and the apron in the circumferential direction of the shield cover main body, In addition, it is a constituent requirement that one of the earthproof materials overlaps with each other at a position where the other earthproof material is fixed to the shield cover body.

  In this case, since a plurality of earthproof materials are arranged by combining the shield cover main body and the apron, only one earthproof material may be fixed to the shield cover main body. The circumferential direction of the shield cover body refers to the circumferential direction of the work rotor.

  In claim 2, a plurality of earth protection materials are arranged adjacent to each other in the circumferential direction of the shield cover body, and one earth protection material overlaps with each other at a position where the other earth protection material is fixed to the shield cover body. When viewed in the radial direction of the rotor, the earthproof material located on the working rotor side in the overlapping portion covers the portion of the earthing material fixed position located on the shield cover main body side from the working rotor side. As a result, it is possible to prevent or suppress the earth and sand from adhering to at least the fixing position of the earth protection material located on the shield cover main body side.

  In this case, since the area where the earth and sand adheres is limited to a part other than the fixed position, the earth and sand will adhere to an area other than the fixed position of the earth protection material, but the part other than the fixed position is restricted by the shield cover body. Therefore, the earthproof material can freely vibrate in the radial direction of the work rotor in accordance with the vibration of the work implement body with the fixed position as the fixed end. For this reason, as described above, in order to demonstrate the effect of dropping the earth and sand adhering to itself due to its own vibration, the earth-proofing material removes the earth and sand over the entire circumference of the earth-proofing material together with the effect of preventing adhesion to the fixed position. (Exclusion) effect is expected.

  Therefore, as described above, when the claw rotates down-cut from the front to the rear in the traveling direction of the work machine main body with respect to the field scene, the two earth-proofing materials adjacent to each other in the circumferential direction of the shield cover main body and overlapping each other Of these, if the earthproof material relatively positioned on the front side in the direction of travel of the work machine body is fixed to the shield cover main body at the overlapping portion, the earthproof material located on the rear side is Demonstrates the function of preventing adhesion.

  Further, in claim 3, when the earthproof material located on the upstream side in the rotation direction of the work rotor is overlapped in a state of covering the earthproof material located on the downstream side from the work rotor side, when viewed in the radial direction of the work rotor, Since the claw rotating around the rotary axis is approaching from the soil-proof material located on the near side to the soil-proof material located on the far side, entry of soil from the overlapping part of two adjacent soil-proof materials is prevented. Is possible.

  For example, when a claw rotates down-cut, if the earth proof material located upstream in the rotational direction overlaps the rotary shaft side of a certain earth proof material, the claw is downstream from the earth proof material located upstream in the rotational direction. Since the landscaping material located on the side is sequentially approached, it is possible to avoid the situation where the earth and sand enters from the overlapping portion of the landscaping material.

  In this case, since the earth and sand tends to adhere from the rear side of the shield cover, if the earth-proofing material located relatively upstream covers the earth-proofing material located downstream, the earth and sand will be on the downstream side. Since the upstream side earth-proofing material tries to prevent it from going around the earth-proofing material, it is possible to avoid a situation in which the earth and sand splashed from the claws enter between the overlapping parts.

  Even when the claw rotates up-cut, the claw is positioned on the downstream side of the upstream side of the soil-carrying material if the soil-carrying material positioned on the upstream side in the direction of rotation overlaps the rotary shaft side of the material. Since the approaching material is sequentially approached, it is possible to avoid a situation in which the earth and sand enters from the overlapping portion of the soil protection material.

  By fixing the elastic earthproof material to the shield cover main body or the shield cover main body and the apron at the position on one side in the circumferential direction, the other end side is made free, so the earthproof material is fixed The position can be freely vibrated in the radial direction of the working rotor with the fixed end.

  As a result, the maximum amplitude at the time of vibration caused by the vibration of the work implement body is exerted to the maximum, so that the effect of inducing falling of the attached earth and sand is enhanced, and the effect of preventing the adhesion and accumulation of earth and sand is obtained. It is done. In particular, when adhering soil protection materials are stacked and fixed so as to cover the fixing position of the soil protection material, it is possible to prevent adhesion of the earth and sand to places where it is difficult to fall off. It can be effectively prevented.

It is sectional drawing orthogonal to the rotary axis | shaft which showed the relationship between the working rotor in the state where the level of an apron is low, and the shield cover of this invention. It is sectional drawing orthogonal to the rotary axis | shaft which showed the relationship between the working rotor in the state where the level of an apron is high, and the shield cover of this invention. It is sectional drawing orthogonal to the rotary axis | shaft which showed the relationship between the work rotor when the apron was flipped up, and the shield cover of this invention. It is the rear view which showed the working machine main body equipped with the work rotor. FIG. 5 is a side view of FIG. 4. (A) is the side view which showed a part of FIG. 5, (b) is the side view which showed a part of FIG. 5 when the apron was flipped up. It is the perspective view which showed the mode of the earth and sand adhering to the shield cover main body inner peripheral surface after the cultivation work by the working machine main body of this invention. It is the perspective view which showed the mode of the earth and sand adhering to the shield cover main body inner peripheral surface after the cultivation work by the conventional working machine main body.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 shows a rotary work machine equipped with a work rotor 5 mounted on the rear part of a tractor and supported by a work machine body 10 that travels with the tractor and a shield cover 1 covering the upper side of the work rotor 5. An example of the configuration of the shield cover 1 is shown in which one or more soil barriers 4 having elasticity are fixed to the surface at a position on one end side in the width direction. The work machine body 10 is attached to the rear part of the tractor so as to be movable up and down via a three-point link hitch mechanism.

  The work machine main body 10 includes a top mast 11 coupled to a three-point link hitch mechanism including a top link and a lower link at the rear of the tractor, and a lower link coupling unit 12. The lower end of the top mast 11 is connected to the PTO shaft of the tractor. A gear box 13 connected via a universal joint, a transmission shaft, and the like is disposed, and a transmission frame 14 and a support frame 15 are installed from the gear box 13 in the width direction of the work machine main body 10 shown in FIGS. The power from the PTO shaft is transmitted to the input shaft 13 a of the gear box 13, and the power received by the input shaft 13 a is transmitted to the transmission shaft that passes through the transmission frame 14.

A chain transmission case 16 is fixed to the distal end portion of the transmission frame 14 so as to hang down, and an end cover 17 facing the chain transmission case 16 is fixed to the distal end of the support frame 15. Between the chain electric case 16 and the end cover 17, the rotary shaft 6 of the work rotor 5 is installed so as to be rotatable about the axis. A chain is stretched between the transmission shaft and the rotary shaft 6, and the power of the transmission shaft is transmitted to the rotary shaft 6 through the chain.

  A claw 7 such as a tilling claw is protruded from the outer periphery of the rotary shaft 6 at an appropriate interval in the circumferential direction. The nail 7 is mainly a nail. However, if it has a function of scooping up soil and sand in a farm scene, the nail 7 includes a nail for a scraper or a drape coater. The claws 7 are arranged in the axial direction of the rotary shaft 6 with an interval that does not interfere with each other. The work rotor 5 is composed of a rotary shaft 6 and a claw 7 projecting from the outer periphery thereof, and the work rotor 5 becomes a tilling rotor.

  Under the transmission frame 14 and the support frame 15, a shield cover main body 2 that covers the rotation range of the claw 7 of the work rotor 5 and protects the work machine main body 10 from earth and sand is disposed. As shown in FIG. 4, the shield cover main body 2 is supported by both frames 14 and 15 by being joined to the lower brackets 14a and 15a protruding below the transmission frame 14 and the support frame 15 at the flange 2a. In the figure, 20 is a gauge wheel for adjusting the depth from the field scene of the working rotor 5 during work by rolling on the field scene.

  On the rear side of the shield cover main body 2 in the direction of travel of the work implement main body 10, an apron 3 that covers the rear of the work rotor 5 is rotatably connected around an axis parallel to the axis of the transmission frame 14. The apron 3 is rotatable with respect to the shield cover main body 2 by being connected to, for example, an end of the shield cover main body 2 on the apron 3 side with a shaft 2b disposed parallel (horizontally) to the shaft of the transmission frame 14. A compression rod 18 is connected to the surface side of the apron 3, that is, the surface on the opposite side of the working rotor 5, in order to keep the contact pressure between the apron 3 and the field scene at an appropriate level and to keep the apron 3 flipped up. Is done.

  One end of the compression rod 18, that is, the end (upper end) on the tractor side is rotatably connected to upper brackets 14 b and 15 b fixed on the transmission frame 14 and the support frame 15, and the other end (lower end) is connected to the apron 3. The bracket 3a fixed to the surface is connected in a state in which the position adjustment in the axial direction can be freely performed. The compression rod 18 includes a coil spring 18a or is mounted by winding the outer periphery.

  One end (upper end) of the coil spring 18a is engaged with an axially slidable engaging portion 18b, and the other end (lower end) is movable in the axial direction of the compression rod 18 and can be stopped at an arbitrary position. The coil spring 18a is always in a state where it bears a compressive force while being engaged with the stopper 19. The bracket 19 of the apron 3 is connected to the stopper 19, and the stopper 19 moves along the compression rod 18 as the apron 3 rotates.

  As shown in FIGS. 1 and 2, when the work machine body 10 is operated, the coil spring 18a is locked to the locking portion 18b and the stopped stopper 19, and the locking portion 18b is subjected to the reaction force of the coil spring 18a. Accordingly, the level of the apron 3 is adjusted so that the contact pressure between the apron 3 and the field scene falls within a certain range by sliding in the axial direction. When the apron 3 is flipped up, the stopper 19 is moved to the upper end side of the compression rod 18 and stopped as shown in FIG. 3 and FIG.

  FIG. 1 shows a state when the working rotor 5 is working when the level of the lowest point through which the claw 7 rotating around the rotary shaft 6 passes and the level of the lower end of the apron 3 are equal or substantially equal. The state at the time of work of the work rotor 5 when the level of the lower end of the apron 3 is located, for example, about 200 mm above the level of the lowest point through which the claw 7 passes is shown. The level of the lower end of the apron 3 can be freely set by adjusting the position of the stopper 19 of the compression rod 18. FIG. 3 shows a state in which the apron 3 is flipped up and stopped in that state. Cleaning of the inner peripheral surface of the shield cover main body 2 is performed in the state shown in FIG.

  As shown in FIG. 1, a plurality of earth barriers 4 are arranged and fixed in the circumferential direction of the shield cover body 2 on the surface of the shield cover body 2 and the apron 3 on the working rotor 5 side.

  Hard rubber having a thickness of about several millimeters to several tens of millimeters is mainly used for the earth barrier material 4, and has elasticity enough to vibrate by itself with the vibration of the work machine body 10, and as shown in FIG. Thus, on the cross section of the rotary shaft 6, as described later, the rigidity close to the end in the circumferential direction without restraining the shield cover main body 2 is stiff enough to hang down by its own weight. If the earthproof material 4 has the appropriate elasticity and rigidity mentioned here, the material of the earthproof material 4 is not limited, and a plastic or metal plate is also used.

  The earthproof material 4 is detachably fixed to the shield cover main body 2 and the apron 3 so as to be replaceable by a fixing tool 8 such as a bolt or a pin. The fixing tool 8 is arranged at one place or around two places in the circumferential direction of the earth protection material 4 (circumferential direction of the shield cover main body 2). Since the adjacent earth shields 4 and 4 are overlapped so that the fixing position by the fixture 8 is covered with the earth shield 4 located on the rear side in the traveling direction or on the front side, as will be described later, on the cross section of the rotary shaft 6. It is better that the number of the fixtures 8 is small, and it is fixed at one place in the drawing. The fixing tool 8 is disposed at an appropriate interval in the length direction of the earth protection material 4 (length (width) direction of the shield cover main body 2).

  When the claw 7 rotates so as to scrape the earth and sand backward in the traveling direction, as shown in the figure, the rear side earthproof material 4 is fixed so as to cover the front side earthproof material 4 and rotates in the reverse direction. In this case, the front side earthproof material 4 is fixed so as to cover the rear side earthproof material 4.

  In FIG. 1, three earthproof materials 4 are stacked and fixed to the shield cover main body 2 excluding the apron 3. However, the earthproof material 4 and the shield are fixed to the apron 3. Since the earthproof material 4 of the cover main body 2 can be stacked, it is sufficient that at least one earthproof material 4 is fixed to the shield cover main body 2. In some cases, four or more earth barriers 4 are fixed to the shield cover main body 2.

  A plurality of the soil barriers 4 are fixed to the shield cover body 2 and the apron 3 while two adjacent soil barriers 4 and 4 partially overlap each other in the circumferential direction of the shield cover body 2. The manner in which the earth shields 4 and 4 adjacent to each other in the circumferential direction of the shield cover main body 2 are determined by the rotation direction of the claws 7.

  For example, when the claw 7 rotates down-cut so as to kick the soil from the front to the rear in the traveling direction, the viewpoint of preventing the entry of the soil between the adjacent soil-proof materials 4 and 4 Therefore, the adjacent earth-proofing materials 4 and 4 are arranged so that the earth-proofing material 4 located on the rear side overlaps the earth-proofing material 4 located on the front side from the rotary shaft 6 side. When the claw 7 rotates in the reverse direction, that is, when the claw 7 rotates upcut so as to jump up the soil from the rear in the traveling direction to the front, the earth-proof material 4 positioned on the front side in the traveling direction is positioned on the rear side. Arrangement material 4 is arranged so that it may overlap from the rotary shaft 6 side.

  As shown in the drawing, when the claw 7 rotates down-cut so as to kick the soil toward the rear in the traveling direction, the two landscaping materials 4 and 4 that overlap each other are relatively forward in the traveling direction of the tractor. The position of the earth protection material 4 is fixed to the shield cover main body 2 at the overlapping portion, and the fixing position (fixing tool 8) of the earth protection material 4 is covered by the earth protection material 4 located on the rear side in the traveling direction, and the rotary shaft It is hidden from the 6th side.

  In this case, the earthproof material 4 located on the rear side in the traveling direction covers the fixing position of the earthproof material 4 located on the front side, and overlaps with the earthproof material 4 from the rotary shaft 6 side and is fixed to the shield cover body 2. Is done. The earth protection material 4 fixed to the apron 3 covers the position of the earth protection material 4 located on the most rear side of the shield cover body 2 and overlaps the earth protection material 4 from the rotary shaft 6 side. The fixing work of each earth barrier 4 to the shield cover main body 2 is sequentially fixed to the shield cover main body 2 from the earth shield 4 located on the front side in the traveling direction of the tractor to the earth shield 4 adjacent on the rear side. The procedure is to do.

  When the claw 7 rotates down-cut toward the rear in the traveling direction, the earth-proofing material 4 located on the front side in the traveling direction is covered with the earth-proofing material 4 located on the rear side, and the shield cover body 2 includes the soil on the rear side. Since it is fixed at a position covered with the repellent material 4, the fixed position to the shield cover body 2 is on the rear side in the traveling direction with respect to the circumferential direction of the soil repellent material 4.

  Since the fixing position to the shield cover body 2 is the rear side in the circumferential direction of the earth protection material 4, the section from the front end of the earth protection material 4 to the fixing position is not restricted. The part near the end on the front side hangs down under its own weight. Since the section from the front side end of the earth protection material 4 to the fixed position is free, this section is free to vibrate with the vibration of the work machine body 10, and the earth protection material 4 adheres by its own vibration. It has the function to drop the earth and sand.

  In order for the shield cover main body 2 to suppress the scattering of earth and sand scraped up by the claws 7, it is desirable to dispose a plurality of earth protection materials 4 so as to surround the work rotor 5. Therefore, in the drawing, the both sides in the circumferential direction of the shield cover main body 2 formed in a polygonal shape are folded back to the inner peripheral side to form a bent portion 2c, whereby the tip of the claw 7 draws the inner peripheral surface of the shield cover main body 2. It is formed in a shape close to a curved surface (arc surface) according to a circular locus, and the earth-proofing material 4 is fixed to the bent portions 2c on both sides in the circumferential direction. Since a plurality of earth barriers 4 are arranged so as to form an arc surface on the cross section of the rotary shaft 6, the earth and sand are scattered to the shield cover body 2 side in order to surround the rotating claw 7 within a minimum area. There is an advantage that the range to be kept can be minimized.

  The earth barriers 4 positioned on both sides in the circumferential direction of the shield cover main body 2 are fixed to the bent portions 2 c, so that the plurality of earth barriers 4 are arranged to form an arc surface so as to surround the work rotor 5. Therefore, scattering of earth and sand can be suppressed as much as possible. Further, in this case, there is also an advantage that the depth of screwing of the fixture (bolt) 8 can be ensured by forming the bent portion 2c.

  FIG. 7 shows the result of the tilling work by the work machine body 10 equipped with the work rotor 5 shown in FIG. For comparison, FIG. 8 shows the result of a tilling work by a conventional working machine main body not equipped with the earth barrier material 4 of the present invention. In FIG. 8, earth and sand having a thickness of about several mm to several tens mm are attached to the inner peripheral surface of the shield cover main body, and are also attached to the rotary shaft 6.

  On the other hand, in FIG. 7, although there is some earth and sand adhering to the rotary shaft 6 side surface of the earthproof material 4, especially the apron 3 side (rear side), earth and sand adhere to the inner peripheral surface of the shield cover body 2. You can see that there is no. In the case of FIG. 7, even if the earth and sand adhere to the rear side of the earth protection material 4, the adhesion area is close to the apron 3, so by lifting the apron 3, the earth and sand can be easily dropped and the earth protection material 4 can be removed. It is possible to clean.

1 ... Shield cover, 2 ... Shield cover body, 2a ... Flange, 2b ... Shaft part, 2c ... Bent part,
3 ... Apron, 3a ... Bracket,
4 ...
5 ... Working rotor, 6 ... Rotary shaft, 7 ... Claw, 8 ... Fixing tool (bolt),
10 …… Work machine body, 11 …… Top mast, 12 …… Lower link joint,
13 …… Gearbox, 13a …… Input shaft,
14: Transmission frame, 14a: Lower bracket, 14b: Upper bracket,
15: Support frame, 15a: Lower bracket, 15b: Upper bracket,
16 …… Chain transmission case, 17 …… End cover,
18 ... Compression rod, 18a ... Coil spring, 18b ... Locking part,
19: Stopper, 20: Gauge wheel.

Claims (3)

A work rotor attached to the rear part of the tractor and supported by a work machine body that travels with the tractor, a shield cover body that covers the work rotor, and a seal that includes an apron that is connected to the rear side in the traveling direction and covers the rear of the work rotor. In a rotary work machine equipped with a cover,
On the surface of the shield cover body on the working rotor side, one or more soil barriers having elasticity are fixed at a position on the upstream side in the rotational direction of the working rotor ,
A shield cover for a rotary working machine, wherein one or more elastic earthproof materials having elasticity are fixed to a surface of the apron on the working rotor side at a position upstream of the working rotor in the rotation direction .   A plurality of the above-mentioned earth protection materials are disposed adjacent to the shield cover body and the apron in the circumferential direction of the shield cover body, and one of the two adjacent earth protection materials is the other The shield cover for a rotary working machine according to claim 1, wherein the shield material overlaps with each other at a position where the shield material is fixed to the shield cover main body.   Of the two adjacent earth-proof materials, the earth-proof material located on the upstream side in the rotation direction of the work rotor overlaps in a state of covering the earth-proof material located on the downstream side from the work rotor side. A shield cover for a rotary working machine according to claim 2.

Images