JP2541692B2 - Flap cover device for rotary cultivator - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a flap cover device for a rotary cultivator.

(Prior Art) In a rotary cultivator, a flap cover is attached to a lower portion of a rear cover in order to more effectively perform ground leveling. This flap cover is attached to the rear cover so that its angle can be adjusted because the posture of the rear cover changes as the working depth changes.

In the conventional flap cover mounting structure, a pivot is provided on the upper surface of the lower part of the rear cover to pivotally support the front part of the flap cover,
The front part of the link, which is connected to the middle part of the upper surface of the flap cover, is connected to the rear cover side so that the position can be changed, and the angle of the flap cover can be adjusted by changing the connecting position of the link. .

(Problems to be Solved by the Invention) In the above-mentioned conventional technique, when the flap cover is adjusted in angle, the gap between the flap cover and the lower portion of the rear cover changes in size.
If the soil is clogged, the soil may be bitten to make adjustment difficult, and the force applied to the flap cover is difficult to be accepted only in a small area, and the durability is low.

The present invention provides a rear cover with a mount having inner and outer arc surfaces, and provides a flap cover side with an upper and lower receiving portion that abuts the inner and outer arc surfaces, and allows the flap cover to be adjustable in angle along the inner and outer arc surfaces. An object of the present invention is to provide a flap cover device for a rotary cultivator, which can be smoothly adjusted even if there is clogging and can receive a force applied to the flap cover in a wide area.

(Means for Solving the Problem) A specific configuration for solving the problem in the present invention is a flap cover device for a rotary cultivator, in which a flap cover 17 is attached to a lower portion of a rear cover 16 so that its angle can be adjusted. A mounting base 68 having inner and outer circular arc surfaces 68a, 68b centered on a common horizontal axis is fixed to the lower outer surface of 16, and an arc-shaped lower support which is in contact with the inner circular arc surface 68a from below at the front portion of the flap cover 17. The portion 72 is formed, the fitting body 73 that is fitted to the mounting base 68 from the rear is fixed to the upper surface of the flap cover 17, and the upper receiving portion 76 that comes into contact with the outer arc surface 68b from above is formed on the mixture body 73. Inner and outer arc surfaces 68 are provided between the mount 68 and the fitting 73.
The angle adjusting means 82 for fixing the flap cover 17 so that the angle can be adjusted is provided around the horizontal axes of a and 68b.

(Operation) When the flap 78 is rotated after the lever 78 of the angle adjusting means 82 is rotated to release the lock, the upper receiving portion 76 moves along the outer arc surface 68b and the lower receiving portion 72. Is an inner circular arc surface 6
Since it moves along 8a and the lower receiving part 72 moves in a circular arc, the distance to the lower outer surface of the rear cover 16 does not change, and it moves smoothly even if there is clogging. The force applied to the flap cover 17 is received by the lower receiving portion 72 contacting the inner arc surface 68a, and the receiving area is wider than the pin pivot.

(Example) Hereinafter, the Example of this invention is described based on drawing.

In FIG. 1, a rotary cultivator 1 has a support case 3 protruding left and right from a gear case 2 in the center, and a transmission case 4 and a side frame (not shown) are fixed to the outer ends of the left and right support arms 3 to form a rotary machine body 5. Is configured.

A top mast 6 is mounted on the gear case 2, a main cover 7 is mounted between the transmission case 4 and the side frame, and a width direction center of the main cover 7 and the gear case 2 are connected by a reinforcing member 8. .

A horizontal shaft-shaped pawl shaft 9 is rotatably supported between the lower part of the transmission case 4 and the side frame, and a large number of tilling pawls 10 are attached to the pawl shaft 9 via brackets. The tiller 10 is for both forward and reverse rotation, but it is also possible to replace the forward and reverse jaws, and the pawl shaft drive system can be switched between forward and reverse rotation, and the rotary tiller 1 is forward and reverse rotation. It is dual-purpose.

The tiller 11 formed by the tiller claw 10 is covered with a cover device 12. The cover device 12 includes a main cover 7 that covers the upper part of the tilling part 11 and front and rear covers 13 and 14 that cover the side parts of the cultivated part 11 so that the rotary machine body 5 is covered.
Is fixed to the front side of the main cover 7 and covers the front and back of the tilling section 11.
5, 16 are provided, and a flap cover 17 is attached to the lower portion of the rear cover 16 so that the angle can be adjusted.

A support arm 19 is projected rearward from the rotary machine body 5 via a bracket 18, and a leveling pressure adjusting means 20 is provided between the rear end of the support arm 19 and the rear cover 16.

In FIGS. 1, 3, and 5, the main cover 7 has an inner wall 7a along the tillage part 11, an outer wall 7b that contributes to the attachment of the reinforcing member 8 and the front cover 15, and left and right side walls 7c thereof. The left and right side walls 7c are attached to the transmission case 4 and the side frame via a vibration isolator. The inner wall 7a rises at the rear end and the rear wall 7d
Is formed.

In FIGS. 1, 3 and 4, the front cover 15 is formed of a plate material made of rubber or elastic synthetic resin, the upper part of which is fixed to the front part of the main cover 7 via a holding plate 22, and the lower part is an inner part. The outer sandwiching plates 23, 24 are fixed over substantially the entire width, and the outer sandwiching plate 23
The middle part on both ends of J protruded outward from the front cover 13
A character-shaped hook member 25 is welded.

The front cover 15 is used when the rotary cultivator 1 is reversely cultivated (upper cut), and is arranged at the front drooping action position shown by the chain line in FIG. It is wound up to the retracted position shown by the solid line in FIG.

On the front cover 13, an abutting portion 26 that abuts the hook member 25 on the lower portion of the front edge to hold the front cover 15 at the operating position,
Engagement portions 27 that engage with the hook members 25 when the front cover 15 is wound up are formed on the upper portions, respectively, and the hook members 25 are provided with a displacement prevention disc 28 outside the front cover 13, The free end side of 25 is a gripping portion 25a so that the front cover 15 can be easily rolled up and drooped.

1, 2, 5 to 7, a boss member 30 is welded to the rear portions of the left and right side walls 7c of the main cover 7 and the rising rear wall 7d of the inner wall 7a in the widthwise center, and the horizontal shaft 31 is attached to the boss member 30. Penetrated,
The horizontal axis 31 is provided with the upper portions of the rear cover 16 and the rake 32.

The rear cover 16 has a tubular member 33 fixed to the upper end of the plate member, a lower portion of the plate member formed into a round shape, and a pair of left and right ribs 34 fixed to the back surface of the plate member.

The rake 32 is located between the tilling part 11 and the rear cover 16 and is used for crushing the cultivated soil and separating fine soil and clods during reverse tillage. The rake 32 is constructed by attaching a large number of rake rods 36 in the width direction to an attachment body 35 having a length extending over substantially the entire width of the tilling part 11.

The mounting body 35 is formed by bending a metal plate, and has a rectangular tubular portion 35a.
A tubular member 38 is fixed to the upper surface of the mounting member 35 via a bracket 37. The tubular member 38 is provided on both the left and right sides of the mounting body 35 and in the central portion, and is laterally provided between the boss member 30 and the tubular member 33 of the rear cover 16. axis
It is fitted to 31 and is stopped by pin 39. The horizontal axis 31 'at the center in the width direction is secured by two pins 39'.

Therefore, the rear cover 16 and the rake 32 can swing up and down with respect to the main cover 7 about the axis of the common horizontal shaft 31, and move far and near with respect to the tiller 11. Since the boss member 30 rotates relative to the tubular member 33 with respect to the horizontal shaft 31, a bush is appropriately fitted.

The rake rod 36 is formed by bending one rod into a U-shape at the center to form two rods. The square shaft portion 40a of the screw 40 that penetrates the lower plate portion 35b of the mounting body 35. Fit the central U-shaped part to, and sandwich it with the sandwiching piece portion 35c below the square tubular portion 35a of the mounting body 35,
Fastened with nut 41.

A rake rod is provided at a connecting portion between the square tubular portion 35a and the holding piece portion 35c.
A stopper 35d is provided so as to prevent the 36 from slipping upward,
The lower end of the lower plate portion 36b is bent upward, and the rake rod 3
An engaging recess 35e with which 6 is engaged is formed, and this engaging recess 35e is formed.
This prevents lateral movement of the rake rod 36.

Reference numeral 44 is a pair of left and right rake position changing mechanisms, which are spring members.
It has 45, position setting members 46 and 47, and stopper 48. One end of each of the left and right horizontal shafts 31 projects outward from the side wall 7c of the main cover 7 and a retaining cylinder 49 is fitted therein, and a pin 50 in the direction orthogonal to the axis is fixed through the pin 50, and a spring member is attached to the pin 50. 45 bases are pivotally supported.

The spring member 45 is formed by connecting a forked member 51 pivotally supported by a pin 50, an engaging member 52 having a ring portion 52a and a coil spring 53, and a spring fitting portion of the forked member 51 and the engaging member 52. The spiral grooves 51a and 52b are formed in the spiral groove 51a and 52b, and the coil spring 53 is freely fitted in the spiral grooves 51a and 52b. The ring portion 52a forms a long hole 52c that is long in a direction orthogonal to the axis of the coil spring 53.

The position setting members 46 and 47 are formed by bending the tips of the round bars and engaging members 5
The position setting member 46 is fixed to the main cover 7 for the working position, and the position setting member 47 is fixed to the rear cover 16 and is in the retracted position. It is for.

The rake 32 is arranged at the operating position A near the tilling part 11 when reverse cultivating, as shown in FIG. 8, and retracted along the rear cover 16 as shown in FIG. 9 when normal cultivating. It is located at position B.

When the elongated hole 52c of the engaging member 52 is engaged with the action position setting member 46, the engagement is stable at a position deviated from the center of the coil spring 53, and the coil spring 53 is bent downward and the rake
A state in which the attachment body 35 of 32 comes into contact with a stopper 48 fixed to the main cover 7 to be in the operating position A and is urged toward the tilling part 11 side, and can be elastically escaped to the rear cover 16 side by collision of debris. Becomes

Further, by removing the spring member 45 from the action position setting member 46,
When the pin 50 is rotated outward by 180 ° and lifted up to a position where it engages with the retracted position setting member 47, the rake 32 is lifted up to a position along the rear cover 16, and in that state the engaging member 52
When the long hole 52c of is engaged with the retracted position setting member 47, stable engagement is achieved at the end of the long hole 52c which is offset from the center of the coil spring 53,
The coil spring 53 is bent downwards and the rake 32 covers the rear cover.
It is repressed to the 16 side and it is in the retracted position B. The rake 32 at the retracted position B does not move away following the swing of the rear cover 16.

That is, the rake position changing mechanism 44 changes the position of the rake 32 between the operating position A and the retracted position B, and urges the cultivated portion 11 side at the changed operating position A and the rear cover 16 side at the retracted position B, respectively. Has a role to do.

The rake position changing mechanism 44 pivotally supports one end of a leaf spring (spring member) on the pin 50, and locks the other end to each of the position setting members 46 and 47 in a state where the leaf spring is curved. It may be configured.

Referring to FIGS. 1, 2, 10, and 11, the rear cover 16 is provided with a triangular notch 55 for cultivating a pot at the center, and the triangular notch 55 is closed by a central auxiliary cover 56. A rear gauge wheel placement cutout 57 is formed in the cutout 57.
Is closed by a side auxiliary cover 58.

A bracket 59 is attached to the rib body 34 of the rear cover 16, and the adjustment rod of the equalizing pressure adjusting means 20 is attached to the bracket 59.
60 are pivoted.

The adjusting rod 60 passes through a support shaft 61 at the rear end of the support arm 19 so as to be vertically movable, and a spring is provided on the upper and lower sides of the support shaft 61.
62 and 63 are fitted, and the upper end of the upper spring 62 and the lower end of the lower spring 63 are positioned by stoppers 64 that are engaged with the adjusting rod 60 so that the vertical position can be adjusted.

The support shaft 61 is made of synthetic resin, and has a support arm.
Even if there is rattling between 19 or the adjusting rod 60, no noise is generated. The rear end of the support arm 19 is formed in a bifurcated shape, and the support shaft 61 penetrates through the two pieces 19a and 19b of the support arm 19.
1 has a small diameter portion 61a at one end, and is attached to a piece 19a through which the small diameter portion 61a penetrates via a snap ring 65.
The 9b side is only penetrated, but not stopped. Therefore, the support shaft 61 is attached to the support arm 19 only on the small diameter portion 61a side, and the axial position is regulated by the step portion 61b formed by forming the small diameter portion 61a and the retaining ring 65. .

1, 2, 12 to 15, a mounting base 68 having a substantially fan-shaped side view is fixed to the lower portion of the rib body 34 of the rear cover 16.
The mounting base 68 has inner and outer circular arc surfaces 68a, 68b formed on the upper and lower sides, and the inner and outer circular arc surfaces 68a, 68b are centered on a common horizontal axis, and the horizontal axis is the rounded portion at the bottom of the rear cover 16. 16
Is the center of the gap between the rounded part 16a and the inner arc surface 68a.
69 are formed. A plurality of holes 70 are formed in the outer arc surface 68b at intervals in the circumferential direction. A stopper pin 71 is fixed to the back side of the mounting base 68.

The flap cover 17 is attachable to and detachable from the mounting base 68 and its angle is adjustable. The flap cover 17 is formed by bending a sheet metal, and its front portion and rear portion are doubled, and the front portion can be inserted into the gap 19 and has an arcuate shape in a side view which is in contact with the inner arc surface 68 from below. The lower receiving portion 72 is formed.

On the upper surface of the flap cover 17, a pair of right and left fitting bodies 73 or a plurality of fitting bodies 73 are fixed so as to correspond to the mounting base 68. This mating body
73 has a U-shaped cross section, is fixed to the front and rear portions of the flap cover 17 and doubles as a reinforcement, the front side is open, and has a pair of left and right guide pieces 73a. .

The fitting body 73 is fitted to the mounting base 68 from the front surface side while being guided by the guide piece 73a, and the boss member 74 and the guide body 75 are fixed to the upper portion thereof, and these are formed on the outer arc surface 68.
An upper receiving portion 76 is formed so as to come into contact with b from above.

A groove 74a is formed at the lower end of the boss member 74, and the guide body 75
Is formed by a U-shaped material so as to have a groove 75a at the center in the width direction, and by having these grooves 74a and 75a, the outer arc surface 6
It is possible to pass over the stopper pin 71 projecting radially outward from 8b.

Reference numeral 77 is a lock pin inserted into the boss member 74, which can be inserted into and removed from the hole 70 of the outer arc surface 68b, and the upper end of the lock pin 77 is pivotally connected to the lever 78.

The lever 78 is pivotally supported by a bracket 79 provided on the upper portion of the fitting body 73 via a support pin 80, and a spring 81 provided on the support pin 80.
The lock pin 77 is biased in the direction to be inserted into the hole 70.

The hole 70, the lock pin 77, the lever 78 and the like constitute the angle adjusting means 82, and the hole 70 into which the lock pin 77 is inserted.
The angle of the flap cover 17 with respect to the rear cover 16 can be adjusted by changing the.

Even if the lock pin 77 is pulled out of the hole 70, it is in a position where it comes into contact with the stopper pin 71 unless it is lifted above the groove 74a, and the stopper pin 71 prevents the fitting body 73 from being easily detached from the mounting base 68. are doing.

The fitting body 73 also serves as a grip portion when the lever 78 is rotated.

(Effect of the Invention) According to the present invention described in detail above, the mounting base 68 having the inner and outer circular arc surfaces 68a, 68b centered on the common horizontal axis is fixed to the lower outer surface of the rear cover 16, and the flap cover 17 is fixed. An arcuate lower receiving portion 72 that is in contact with the inner circular arc surface 68a from below is formed in the front portion, and a fitting body 73 that fits into the mounting base 68 from the rear is fixed to the upper surface of the flap cover 17, and the fitting body 73 is fixed to the fitting body 73. An upper receiving portion 76 that abuts from above on the outer circular arc surface 68b is formed, and the flap cover 17 is fixed between the mounting base 68 and the fitting body 73 around the horizontal axis of the inner and outer circular arc surfaces 68a and 68b so that the angle can be adjusted. Angle adjusting means 82
Since it is provided, even if there is clogging between the lower portion of the rear cover 16 and the lower receiving portion 72 of the flap cover 17, the angle of the flap cover 17 can be smoothly adjusted, and the force applied to the flap cover 17 can be adjusted. Can be received by the inner circular arc surface 68a that is in contact with the lower receiving portion 72, so that the force can be received in a wider area than in the case of the pin pivot and the durability can be improved.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is an overall side view of a forward / reverse rotary cultivator, Fig. 2 is a rear view of a main cover and a rear cover, and Fig. 3 is a part of a front part of a cover device. Fig. 4 is a cutaway side view, Fig. 4 is a plan view of the front cover when in use, Fig. 5 is a partially cutaway side view of the rear part of the main cover, Fig. 6 is a sectional plan view of the rear part of the main cover, and Fig. 7 is Fig. 6. FIG. 7 is a sectional view taken along the line VII-VII, FIGS. 8 and 9 are explanatory views showing the action position and the retracted position of the rake, FIG. 10 is a sectional side view of the leveling pressure adjusting means, and FIG. 11 is FIG. XI-XI line cross-sectional view, FIG. 12 is a cross-sectional side view of the flap cover, FIG. 13 is a perspective explanatory view showing the flap cover mounting structure, FIG. 14 is a XIV-XIV line cross-sectional view of FIG. The figure is a sectional view taken along the line XV-XV in FIG. 1 ... Rotary tiller, 5 ... Rotary body, 7 ... Main cover, 11 ... Tiller, 12 ... Cover device, 16 ... Rear cover, 17 ... Flap cover, 68 ... Mounting base, 68a …
… Inner arc surface, 68b …… Outer arc surface, 69 …… Gap, 70 ……
Hole, 71 …… Stopper pin, 72 …… Lower receiving part, 73 …… Mating body, 76 …… Upper receiving part, 77 …… Lock pin, 78 …… Lever,
82 …… Angle adjustment means.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Patent Laid-Open No. 3-168001 (JP, A) Japanese Patent Laid-Open No. 2-20203 (JP, A) Actual Japanese Laid-Open No. 1-160201 (JP, U)

Claims (1)

(57) [Claims] 1. A flap cover device for a rotary cultivator, wherein a flap cover (17) is attached to a lower portion of a rear cover (16) so that its angle can be freely adjusted, and a common horizontal axis is provided on a lower outer surface of the rear cover (16). Mounting base (68) having inner and outer arc surfaces (68a) (68b) as the center
The inner arc surface (68) on the front of the flap cover (17).
An arc-shaped lower receiving portion (72) that is in contact with the lower side is formed in a), and a fitting body (73) that is fitted to the mounting base (68) from the rear is fixed to the upper surface of the flap cover (17). Coalescing (73)
Is formed with an upper receiving portion (76) that comes into contact with the outer circular arc surface (68b) from above, and the horizontal axis of the inner and outer circular arc surfaces (68a) (68b) is provided between the mounting base (68) and the fitting body (73). A flap cover device for a rotary cultivator, characterized in that an angle adjusting means (82) for fixing the flap cover (17) to adjust the angle is provided around the core.