JP4524165B2 - Gap adjustment structure between members - Google Patents

Description

  The present invention relates to a gap adjusting structure for adjusting a gap between members.

  For example, a lawn mower has a rotary blade and a fixed blade in the lawn mower body. In addition, in order to adjust the gap between the rotary blade and the fixed blade, a gap adjustment structure for moving the fixed blade closer to and away from the rotary blade is provided to adjust the gap between the rotary blade and the fixed blade. This improves the sharpness. This gap adjusting structure is inserted into an insertion hole formed in the support portion of the fixed blade and screwed into a screw hole formed in the support portion of the rotary blade, and both of the adjustment screws are mounted on the adjustment screw. And a coil spring for preventing the adjustment screw from being loosened. The coil spring is arranged between the support portions and biases the support portions in a direction of separating the support portions. In this gap adjustment structure, the amount of the gap between the two blades is adjusted by rotating the screw so that the coil spring expands and contracts (see, for example, cited document 1).

  By the way, the rotary blade is detachably provided on the lawn mower body and can be exchanged. There are reel blades and hatching blades as rotary blades.When replacing these rotary blades, for example, the lawn mower body must be in a standing position, and the fixed blade can be removed from the side of the rotary blade by removing the adjusting screw from the support. Avoid this and make the side of the rotary blade open. Since the coil spring is only between the support part of the fixed blade and the support part of the rotary blade, it is easy to come off. Therefore, the adjustment screw must be removed from the support part and stored separately.

  After replacing the rotary blade, it is necessary to adjust the amount of the gap with the fixed blade again. Therefore, the user inserts the adjustment screw into the insertion hole of the support portion of the fixed blade. The adjustment screw is positioned and screwed into the screw hole of the support portion of the rotary blade with the spring mounted, and then the adjustment screw is turned to adjust the gap between the rotary blade and the fixed blade.

Japanese Utility Model Publication No. 52-117464

  However, it is not easy to align the tip of the adjustment screw inserted into the insertion hole of the support part of the fixed blade with the screw hole of the support part of the rotary blade. In addition, since the coil spring is simply sheathed on the adjustment screw, the adjustment screw is operated while holding the coil spring with one hand so that the coil spring does not fall off and is screwed into the screw hole. Must be matched. This problem in operation is not limited to the replacement operation of the rotary blade, but is also the same during assembly. Furthermore, such work problems are not limited to lawn mowers, but are common to this type of clearance adjustment structure used in various other machines.

  Then, this invention makes it a subject to provide the clearance gap adjustment structure between the members which can perform easily the operation | work which screws the adjustment screw of one member side to the screw hole of the other member side.

Gap adjustment structure between members of the present invention, formed on the rotary blade 17 together with the to the fixed blade 16 and the rotary blade 17 and the movable toward and away from, is inserted into the insertion hole 81 formed in the fixed blade 16 An adjustment screw 82 that is screwed into the screw hole 42, and a direction that is disposed between the fixed blade 16 and the rotary blade 17 so as to be spaced apart from the fixed blade 16 and the rotary blade 17 while being externally mounted on the adjustment screw 82. And an adjustment screw loosening-preventing coil spring 46, and rotating the adjustment screw 82 to adjust the amount of the gap δ between the fixed blade 16 and the rotary blade 17 and the rotation. In the gap adjusting structure between the blades 17, the screw hole 42 is positioned inside one end opening of the coil spring 46, and the rotary blade 17 has a pair of support walls 37 protruding from both sides of the screw hole 42. The opposite surfaces 37a of the support walls 37 Les, the arcuate recess 45 of the center 42a and the concentric screw hole 42 is formed to face, the rotary blade 17 of the coil spring 46 by fitting the end portion of the coil spring 46 in the both recesses 45 The mounting and adjusting screw 82 is removed from the fixed blade 16 and the rotary blade 17, and the coil spring 46 is configured to be held by the rotary blade 17 in a state where the fixed blade 16 and the rotary blade 17 are separated from each other. It is a feature.

  In the above configuration, by rotating the adjustment screw 82, the one member 16 approaches and separates from the other member 17, and the gap δ between the two members 16 and 17 can be adjusted. Since the coil spring 46 is attached to the other member 17, the coil spring 46 is inserted when the adjustment screw 82 is inserted into the insertion hole 81 of the one member 16 and screwed into the screw hole 42 of the other member 17. Since the coil spring 46 is attached to the other member 17 so that the screw hole 42 of the other member 17 is positioned inside the one end opening of the coil spring 46. Is easily positioned in the screw hole 42. Therefore, the work for adjusting the gap δ between the one member 16 and the other member 17 can be easily performed as the work for bringing the one member 16 toward the other member 17 and the subsequent work. it can.

  In the gap adjusting structure between the members, the adjusting screw 82 is rotated so that the adjusting screw 82 is removed from the insertion hole 81 of one member 16 and the screw hole 42 of the other member 17. On the other hand, when the one member 16 is separated, the coil spring 46 is attached to the other member 17. Therefore, even if the adjustment screw 82 is removed as described above, the coil spring 46 is held by the other member 17. Accordingly, it is not necessary for the operator to hold the coil spring 46 so that the coil spring 46 does not fall off when the adjustment screw 82 is removed, and the adjustment screw 82 is removed and one member 16 is separated from the other member 17. The work when doing it becomes easy.

  In the above configuration, one end portion of the coil spring 46 is securely held by the other member 17 by being fitted to the fitting portions 37 and 45. Therefore, even if the adjusting screw 82 is removed as described above, The spring 46 is securely held by the other member 17. Accordingly, it is not necessary for the operator to hold the coil spring 46 so that the coil spring 46 does not fall off when the adjustment screw 82 is removed, and the adjustment screw 82 is removed and one member 16 is separated from the other member 17. The work when doing it becomes easy. Further, since one end portion of the coil spring 46 is fitted into the fitting portions 37 and 45 and is securely held by the other member 17, the adjustment screw 82 is inserted into the insertion hole 81 of the one member 16, and the other When screwing into the screw hole 42 of the member 17, the adjustment screw 82 can be reliably guided while the coil spring 46 is further stabilized.

  In the above configuration, one end of the coil spring 46 is securely fitted and held in the recess 45 formed in each of the opposing surfaces 37a of the both support walls 37. Therefore, even if the adjusting screw 82 is removed as described above. The coil spring 46 is securely held by the other member 17, and the work when the adjustment screw 82 is removed to separate the one member 16 from the other member 17 becomes easy. Furthermore, since one end of the coil spring 46 is securely fitted and held in the recess 45 formed in each of the opposing surfaces 37 a of the both support walls 37, the adjustment screw 82 is inserted into the insertion hole 81 of one member 16. Even when the screw spring 42 is inserted and screwed into the screw hole 42 of the other member 17, the adjustment spring 82 can be reliably guided while the coil spring 46 is further stabilized.

  In order to attach the coil spring 46 to the other member 17, a spiral hole having a predetermined length along the torsion direction of the coil spring 46 is formed in the other member 17, and one end portion of the coil spring 46 is formed in this hole. It is also possible to insert and install. By configuring in this way and attaching the coil spring 46 to the other member 17, similarly to the above, it is easy to remove the adjusting screw 82 and separate one member 16 from the other member 17. Thus, even when the adjustment screw 82 is inserted into the insertion hole 81 of one member 16 and screwed into the screw hole 42 of the other member 17, the adjustment screw 82 is set in a state in which the coil spring 46 is further stabilized. It becomes possible to guide. Furthermore, in order to attach the coil spring 46 to the other member 17, the structure which uses an adhesive agent is also considered.

  According to the present invention, by attaching the coil spring to the other member so that the screw hole provided in the other member is located inside the one end opening of the coil spring, one member approaches the other member. This makes it easier to work.

  Hereinafter, an example in which the structure for adjusting a gap between members according to an embodiment of the present invention is applied to a lawn mower will be described with reference to the drawings. FIG. 1 is a front view in which a part of the lawn mower is omitted, FIG. 2 is a bottom view of the lawn mower, FIG. 3 is a partially omitted front sectional view showing the internal structure of the lawn mower body in a standing state, and FIG. Is an enlarged front sectional view showing the main part, FIG. 5 is a partially broken side view centering on the driving part of the lawn mower, and FIG. 6 is a diagram when replacing the rotary blade in a state where the lawn mower body is set up. FIG. 7 is a side view of the holding body, FIG. 8 is a partially enlarged side view of the holding body, and FIG. 9 is a sectional view taken along line DD in FIG.

  As shown in FIGS. 1 to 3, the lawn mower 1 has a lawn mower main body 2, and the lawn mower main body 2 is divided into two divided lower body parts 3 and upper body parts 4 by set screws 5. It is assembled by fixing. A base end portion of the operation handle 7 is attached to the rear of the upper body portion 4 so as to be rotatable around the support shaft 6.

  A wheel 10 is disposed in the front portion of the lower main body 3, and a support portion 12 that rotatably supports the wheel 10 around its support shaft 11 is provided. A roller 13 is disposed at the rear of the lower main body 3, and a support portion 15 that supports the roller 13 around its support shaft 14 is provided. As shown in FIG. 2, a fixed blade 16 (corresponding to one member) and a rotary blade 17 (corresponding to the other member) between the wheel 10 and the roller 13 in the lawn mower main body 2 (lower main body portion 3). Corresponding).

  A reel blade is shown as the illustrated rotary blade 17. The reel blade is fixed to the shaft body 20 along the width direction C of the lawn mower body 2 and the shaft body 20 via a connecting member 21 projecting in the radial direction of the shaft body 20 so as to be equally spaced in the circumferential direction. As shown in FIG. 5, a plurality of spiral rotating blade portions 22 arranged, and a bearing device 25 that supports the shaft body 20 rotatably around the axis 20 a with small diameter portions 23 at both ends thereof are provided.

  The bearing device 25 is detachably attached to a bearing 27 (ball bearing) and a mounting piece 30 a of a mounting plate 30 that covers the bearing 27 and is disposed along the inner surfaces of the side walls 28 and 29 of the lower body 3. It is comprised from the holding body 31 attached to.

  As shown in FIGS. 3 to 6, the holding body 31 includes an annular portion 33 that covers a portion corresponding to the outer ring 32 of the bearing 27, and an extension portion 34 that extends from the annular portion 33 in the front-rear direction. As shown in FIG. 7, the front and rear end surfaces of each extension 34 are formed in an arc shape. U-shaped outer walls 35 and 36 projecting upward and downward in FIG. 7 along the edge portion are formed on the outer peripheral edge portion of the extension portion 34, and the outer walls 35 and 36 respectively support in the width direction C. A wall portion 37 and a support wall portion 38 are provided on the upper and lower sides of the annular portion 33 in FIG. A hole 39 penetrating in the thickness direction of the extension 34 is formed on the front and rear end sides of each extension 34. As shown in FIGS. 4 and 9, the holding body 31 has a nut 41 integrated by welding on the upper surface of the mounting piece 30 a having a screw hole 40 (female screw) communicating with each hole 39. A screw hole 42 (female screw) is formed between each hole 39 and the annular portion 33 as a pair with the annular portion 33 interposed therebetween. As shown in FIG. 8, an arcuate recess 45 (corresponding to a fitting portion) in which the center 42 a of the screw hole 42 is concentric with the opposing surface 37 a of the support wall portion 37 is opposed (opposed) in the width direction C. It is formed at the position. A part of the outer periphery of one end (upper end one end) of the coil spring 46 is fitted into the recess 45. That is, the support wall portion 37 and the recess 45 constitute a fitting portion of the present invention, and the screw hole 42, the recess 45, and the coil spring 46 are concentric. In addition, the screw hole 42 is positioned on the inner side (inner diameter side) of one end opening of the coil spring 46, and the coil spring 46 is held by the holding body 31. The arc diameter of the recess 45 is set equal to or slightly larger than the winding diameter of the coil spring 46.

  As shown in FIG. 4, the first mounting bolt 50 is inserted into each hole 39 of the holding body 31, and the first mounting bolt 50 is screwed into the screw hole 40 of the nut 41, thereby holding the holding body 31. Is detachably attached to the attachment plate 30.

  The small-diameter portion 23 of the shaft body 20 of the rotary blade 17 penetrates the bearing inner ring of the bearing device 25, and the small-diameter portion 23 protrudes outward in the width direction C from the mounting plate 30. The lawn mower 1 has a drive unit 51 for rotating the rotary blade 17, that is, the shaft body 20. The drive unit 51 includes a drive motor 53 that is internally supported by the lawn mower body 2 via a support device 52 having a bearing 49 and the like, and a small-diameter pulley 55 that is externally fixed to the drive shaft 54 of the drive motor 53. A large-diameter pulley 56 fitted and fixed to the small-diameter portion 23 of the shaft body 20, a transmission belt 57 wound around the pulleys 55 and 56 so as to rotate the small-diameter pulley 55 and the large-diameter pulley 56 integrally, and the like. Have

  A cylindrical shaft portion 60 is formed at the center of the large-diameter pulley 56 so as to protrude inward in the width direction C. The cylindrical shaft portion 60 is inserted into the annular portion 33 of the bearing device 25 from the outside in the width direction C, and the shaft The small diameter portion 23 of the body 20 is externally fitted. Then, the large diameter pulley 56 and the shaft body 20 are assembled so as to rotate integrally around the shaft center 20 by tightening the nut 62 to the male screw 61 formed at the tip protruding portion of the small diameter portion 23.

  A lid member 59 for opening and closing the area of the lower main body 3 corresponding to the side of the rotary blade 17 is detachably attached by a set screw 63 shown in FIG.

  Next, the configuration of the fixed blade 16 as one member will be described. As shown in FIGS. 2 to 5, the fixed blade 16 is rotatably attached to a fixed blade shaft 65 provided so as to be bridged between the rear portions of the mounting plate 30. The fixed blade 16 is a fixed plate having a base plate 68 fixed to the lower surface of the holder 66 so as to protrude from a tip end portion 67 of the holder 66 and a band plate-like holder 66 supported rotatably on the fixed blade shaft 65. The blade part 70 and the attachment member 71 provided integrally on both sides in the width direction C of the tip part 67 of the holder 66 are provided. The attachment member 71 has a bent piece 71A in which a part of both sides of the front end portion 67 of the holder 66 is bent upward, and the front end portion of the bent piece 71A substantially follows the front end portion 67 of the holder 66. And a mounting piece 71B bent outward in the width direction C. The holder 66 is supported by the fixed blade shaft body 65 via brackets 69 formed at the base ends on both sides in the width direction C. The bracket 69 has a diameter relative to the fixed blade shaft body 65. A groove 65a for assembling from the outside in the direction is formed.

  As shown in FIGS. 2, 3, 4, and 6, the base 68 of the fixed blade 70 is fixed to the tip 67 of the holder 66 by a mounting screw 73. The mounting screws 73 are arranged at equal intervals in the width direction C. An insertion hole 81 is formed in the attachment piece 71B of the attachment member 71, a second attachment bolt 82 (corresponding to an adjustment screw) is inserted through the insertion hole 81, and the second attachment bolt 82 is inserted through the inner diameter space of the coil spring 46. (The coil spring 46 externally mounts the second mounting bolt 82) and further screwed into the screw hole 42 of the extension 34 of the holding body 31 so that the fixed blade 16 is connected to the fixed blade shaft 65 and the holding body 31. It is supported between. The coil spring 46 uses the bottom surface 34a of the extension 34 of the holding body 31 and the upper surface 71b of the mounting piece 71B of the mounting member 71 as spring seats, and biases the holding body 31 and the mounting member 71 in the direction of separating them. The loosening of the second mounting bolt 82 is prevented. The end of the coil spring 46 facing the mounting piece 71B is located on the locus of the insertion hole 81 when the fixed blade 16 is rotated around the fixed blade shaft 65, and the coil spring 46 It arrange | positions so that it may communicate with internal diameter space.

  In such a configuration, by rotating the second mounting bolt 82 and rotating the fixed blade 16 about the fixed blade shaft 65, the distal end portion 70 a of the fixed blade portion 70 and the distal end portion 22 a of the rotary blade portion 22 are rotated. And a clearance adjustment structure that adjusts the amount of the clearance δ between the distal end portion 70 a of the fixed blade portion 70 and the distal end portion 22 a of the rotary blade portion 22. For example, when it is desired to reduce the clearance δ, the second mounting bolt 82 is rotated in one direction (tightening direction) with a tool such as a wrench against the elasticity of the coil spring 46, and conversely when the clearance δ is increased, the second mounting is performed. If the bolt 82 is rotated in the other direction (loosening direction), the gap δ is adjusted. In FIG. 1, reference numeral 90 denotes a grass collection basket into which the cut grass is placed. The grass collection basket 90 is detachably provided on a hook 91 provided at the rear portion of the lawn mower body 2.

  When it is necessary to replace the rotary blade 17, for example, the lawn mower is set up with its back facing downward as shown in FIGS. 3, 4, and 6, and the bottom of the lawn mower 1 is positioned laterally. Since there is the fixed blade 16 on the side of the rotary blade 17, first, the side of the rotary blade 17 is opened by rotating the fixed blade 16 around the fixed blade shaft 65. In this case, the second mounting bolt 82 is rotated in the loosening direction, and is removed from the holding body 31 and the mounting member 71 of the rotary blade 17. As a result, the fixed blade 16 becomes free around the fixed blade shaft 65, so that the fixed blade 16 can be rotated counterclockwise in FIGS.

  At this time, one end of the coil spring 46 is fitted into the recess 45 of the support wall 37 of the holding body 31, so that the second mounting bolt 82 is connected to the holding body 31 of the rotary blade 17 and the fixed blade as described above. Even if it is removed from the 16 attachment members 71, the coil spring 46 remains held by the holding body 31. For this reason, the troublesome work in which the user holds the coil spring 46 by hand and removes the second mounting bolt 82 as in the prior art can be eliminated. Further, the coil spring 46 can be removed from the lawn mower body 2. A state of falling into the inside can be prevented.

  Regarding replacement of the rotary blade 17, first, the set screw 63 is removed from the lid member 59, and the lid member 59 is removed from the lower main body portion 3, thereby opening an area corresponding to the side of the rotary blade 17. Next, the nut 62 is loosened and the large diameter pulley 56 is removed from the small diameter portion 23 of the shaft body 20. On the other hand, the first mounting bolt 50 is loosened and removed from the screw hole 40 of the nut 41 and removed from the holding body 31. Since the side of the rotary blade 17 is opened in advance, the rotary blade 17 can be removed from the lawn mower body 2 by pulling the rotary blade 17 forward. When the rotary blade 17 is replaced, only the integrated reel blade portion including the shaft body 20, the connecting member 21 and the rotary blade portion 22 is replaced, and the bearing device 25 is re-used as a component constituting the new rotary blade 17. use. For example, when the rotary blade portion 22 of the rotary blade 17 is worn due to use and is replaced with a new rotary blade 17, the bearing device 25 used so far is mounted on each small diameter portion 23 of the shaft body 20. To do. At this time, the coil spring 46 is fitted into the concave portion 45 of the support wall portion 37 of the holding body 31, and thus the coil spring 46 is held by the holding body 31. Then, the holding body 31 is fixed to the mounting plate 30 again using the first mounting bolts 50, the large-diameter pulley 56 is attached to the small-diameter portion 23 of the shaft body 20, the nut 62 is fastened to the male screw 61, and both pulleys 55, A transmission belt 57 is wound around 56. Then, the lid member 59 is fixed to the lower main body 3 by the set screw 63.

  When the replacement of the rotary blade 17 is completed as described above, the fixed blade 16 is now supported by the fixed blade shaft 65 and the holding body 31. In this case, the inner diameter space between the insertion hole 81 and the coil spring 46 is obtained by rotating the holder 66 around the fixed blade shaft 65 in the clockwise direction and bringing the attachment member 71 as close as possible to or in contact with the coil spring 46. The second mounting bolt 82 is inserted into the insertion hole 81 and further pushed. Then, the second mounting bolt 82 passes through the inner diameter space of the coil spring 46. That is, the coil spring 46 performs the function of guiding the second mounting bolt 82. Furthermore, since the screw hole 42 of the holding body 31 is positioned inside (on the inner diameter side) of one end opening of the coil spring 46, when the second mounting bolt 82 is guided to the coil spring 46, the second mounting bolt 82. It becomes possible to easily position the tip of the screw hole 42 in the screw hole 42. When the second mounting bolt 82 is positioned in the screw hole 42, the second mounting bolt 82 is rotated in one direction against the elasticity of the coil spring 46, and the second mounting bolt 82 is screwed into the screw hole 42. The fixed blade 16 is supported between the fixed blade shaft 65 and the holding body 31. Thereafter, the second mounting bolt 82 is further rotated in one direction or the other direction, thereby adjusting the amount of the gap δ between the distal end portion 70a of the fixed blade portion 70 and the distal end portion 22a of the rotary blade portion 22. be able to.

  The holding body 31 has a symmetrical shape with respect to the center in the longitudinal direction. This eliminates the need for the user to consider directivity when assembling the holding body 31 (bearing device 25) into the small diameter portions 23 at both ends of the shaft body 20, and can be used in common for both the small diameter portions 23 at both ends. This is to make parts.

  Moreover, although the shape of the fixed blade part 70 of the fixed blade 16 to be used may differ according to the difference of the rotary blade 17 to be used, the structure other than the fixed blade part 70 in the fixed blade 16 is the same. In this case, it is necessary to remove and replace the fixed blade 16 from the fixed blade shaft 65. However, if the entire fixed blade 16 is pulled in the radial direction of the fixed blade shaft 65, the bracket 69 is guided by the groove 65a. Thus, the fixed blade 16 can be removed from the fixed blade shaft 65, and the fixed blade 16 can be replaced according to the type of the rotary blade 17.

  Furthermore, although the lawn mower 1 is taken as an example of the mechanical device using the gap adjustment structure in the above embodiment, the present invention is not limited to this. That is, an adjustment screw that is inserted into an insertion hole formed in one member and is screwed into a screw hole formed in the other member, and is disposed between both members while being externally mounted on the adjustment screw, thereby separating the two members from each other. The clearance adjustment structure of the present invention is a mechanical device that has a coil spring for preventing loosening of the adjustment screw biased in the direction and adjusts the amount of the gap between the two members by rotating the adjustment screw. It can be applied and can provide the same effects as described above.

The partial omission sectional view of the lawn mower which shows the embodiment of the present invention. The bottom view of the lawn mower. Similarly, a partially omitted front sectional view showing the internal structure of the lawn mower body in a standing state. The expanded front sectional view which shows the principal part similarly. The partially broken side view which mainly represented the drive part of the lawn mower. Similarly, a partially omitted front sectional view when replacing the rotary blade with the lawnmower body upright. The side view of a holding body similarly. The partially expanded side view of a holding body similarly. FIG. 8 is a sectional view taken along the line DD in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Lawn mower, 2 ... Lawn mower main body, 7 ... Operation handle, 16 ... Fixed blade, 17 ... Rotary blade, 20 ... Shaft body, 22 ... Rotary blade part, 25 ... Bearing device, 31 ... Holding body, 33 ... annular part, 34 ... extension part, 35, 36 ... outer wall, 37, 38 ... support wall part, 41 ... nut, 45 ... recess, 46 ... coil spring, 50 ... first mounting bolt, 56 ... large-diameter pulley, 59 ... Lid member, 65 ... Shaft body for fixed blade, 66 ... Holder, 70 ... Fixed blade portion, 71 ... Mounting member, 81 ... Insertion hole, 82 ... Second mounting bolt

Claims (1)

In order to allow the fixed blade (16) and the rotary blade (17) to approach and separate from each other, the fixed blade (16) is inserted into an insertion hole (81) formed in the fixed blade (16) and formed in the rotary blade (17). and Tanejiana (42) screwed adjusting screws to (82), the fixed blade is disposed between the the adjusting screw (82) to the exterior state with the fixed blade (16) and rotary blade (17) ( 16) and a coil spring (46) for preventing loosening of the adjusting screw that urges the rotating blades (17) in the direction of separating them, and the fixed blade (16) by rotating the adjusting screw (82). a gap adjustment structure between the gap ([delta]) the fixed blade to adjust the amount of (16) and rotary blade (17) between the rotary blade (17),
The screw hole (42) is located inside one end opening of the coil spring (46);
The rotary blade (17) has a pair of support walls (37) protruding on both sides of the screw hole (42), and the screw holes (42) are respectively formed on the opposing surfaces (37a) of the both support walls (37). ) center (was 42a) concentric arcuate recess (45) of are formed to face the coil spring (46) by fitting the end portion of the coil spring in the both recesses (45) (46) The coil spring (16) is attached to the rotary blade (17), the adjusting screw (82) is removed from the fixed blade (16) and the rotary blade (17), and the fixed blade (16) and the rotary blade (17) are separated from each other. 46) The clearance adjustment structure between the fixed blade (16) and the rotary blade (17), which is configured to be held by the rotary blade (17) .

Images