JPS635441Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mounting structure for a rotary cover in a rotary tilling device, which prevents deformation of the bracket for attaching the rotary cover to the machine frame, and also allows the bracket to reinforce the rotary cover. It is.

In some rotary tilling devices, as shown in FIG. 1, a rotary cover 1 is attached to a bracket 4 fixed to the machine frame such as a rotary support 3 by means of a bracket 2 fixed on the cover 1. However, in the past, the bracket 2 fixedly attached to the rotary cover 1 was simply formed by protruding a pair of left and right mounting portions 5 on the rotary cover 1, as shown in FIG. It was easy to deform, and the rotary cover could not be reinforced by this. Further, as shown in FIG. 2, the bracket 2 is formed into a U-shaped cross section, comprising a pair of left and right rising portions 6 having a mounting portion 5 at one end, and a connecting portion 7 connecting the lower ends of the rising portions 6. There is a model in which the lower surface of 7 is welded onto the rotary cover 1, but in this case also the mounting part 5
The bracket 2 is easily deformed in the left-right direction along with the rising portion 6, and it is difficult in manufacturing to curve the connecting portion 7 along the rotary cover 1. Therefore, the bracket 2 is relatively short in the front-back direction. However, the rotary cover 1 could not have a rib function for reinforcing it.

The present invention solves the above problems, and its feature is that the rotary cover 29 covering the upper part of the tilling section 25 is attached to the machine frame through the attachment part 43 of the bracket 37 fixed on the rotary cover 29. 13, the bracket 31 is provided with a pair of left and right rising portions 44 that are long in the front-rear direction and have a mounting portion 43 at one end thereof.
The upper ends of this pair of rising parts 44 are attached to the mounting part 4.
With the connection part 45 connecting left and right except for 3,
Each of the rising portions 44 is integrally formed with a U-shaped cross section, and is configured to form a passage 51 penetrating in the front-rear direction between the bracket 37 and the rotary cover 29.
The lower end edges of the rotary cover 29 are fixed to the upper surface of the rotary cover 29, and each mounting portion 4 of the pair of left and right rising portions 44 is fixed.
3 to the machine frame 13 side is formed with a deformation preventing portion 52 that connects the mounting portions 43 to each other so as to prevent the mounting portions 43 from deforming in the left-right direction.

Hereinafter, the present invention will be explained according to the illustrated embodiment. In FIGS. 3 and 4, reference numeral 11 denotes a side drive type rotary tilling device, which is connected to the rear of the tractor via a three-point link mechanism 12. . 1
Reference numeral 3 denotes a machine frame, in which a pair of left and right support arms 15 are integrally connected in a cylindrical shape from a gear transmission case 14 provided at the center, and each bracket 16 is fixedly installed at the outer end of each arm 15 in the front and back direction. . A top mast 17 is erected on the transmission case 14, and support links 18 are connected between the top mast 17 and a pair of brackets 16, respectively. Transmission case 14
has a built-in bevel gear transmission that is received via an input shaft 19, and a transmission output shaft 20 is covered by one support arm 15 and extends outward. Each bracket 16 is equally spaced on the left and right, and an extension support arm 2 is attached to each bracket 16.
1 is fixed by welding, and a support frame 22 is provided at each outer end of the support arm 21 to project downward. 23 is a transmission case, one support frame 2
A bowl-shaped case 23 is detachably attached to the transmission case 23, and a transmission device such as a chain winding type or a gear engagement type that is driven by a transmission output shaft 20 is built into the transmission case 23. Reference numeral 24 denotes a pair of left and right bearing devices, which are mounted at corresponding positions on the lower part of each support frame 22, and support the pawl shaft 26 of the tiller 25 so as to be rotatable around the horizontal axis via each bearing device 24. A large number of tilling claws 27 are detachably attached to the claw shaft 26.

28 is a tillage cover device, rotary cover 29
And, the bending metal fitting 3 is attached to this rotary cover 29.
It consists of a lower cover 31 connected via 0,
The rotary cover 29 is curved in the front-rear direction so as to cover the upper part of the tilling section 25. Both ends of the rotary cover 29 in the left and right direction are attached to each support frame 22 via a vibration isolating support device 36 that includes a cover flange 32, bolts 33, a vibration isolator 34 made of rubber, etc., and a nut 35. Further, the middle portion of the rotary cover 29 in the left-right direction is attached to a pair of brackets 16 via a bracket 37 and a vibration isolating material 38, which are fixed to the rotary cover 29.

As shown in FIG. 5, the vibration isolating material 38 is made by fitting and baking a rubber elastic body 41 between metal cylindrical bodies 39 and 40 which have a double-cylindrical structure with inner and outer concentricity, and the outer metal cylindrical body 39 is fitted and fixed in a through hole 42 formed in the bracket 16. As shown in FIG. 6, the bracket 37 is long in the front-rear direction and has a mounting portion 43 at its front end.
It is integrally formed into a U-shaped cross section by a pair of left and right rising portions 44 having a left and right side, and a connecting portion 45 that connects the upper ends of the pair of rising portions 44 to the left and right sides except for the mounting portion 43, and the lower end edge of each rising portion 44 is curved along the upper surface of the rotary cover 29 and welded to the upper surface over the entire length, and a passage 51 is formed between the bracket 37 and the rotary cover 29 in the front-rear direction. Each mounting portion 43 has mounting holes 46 opened so as to correspond to each other, and the bracket 37 and the vibration isolator 38 have heads inserted through the mounting holes 46 and the inner metal cylindrical body 40, as shown in FIG. The rotary cover 29 is fastened with bolts 47 and nuts 48, and the rotary cover 29 is attached to the bracket 37.
Bracket 1 on the machine frame 13 side via the mounting part 43 of
It is attached to 6. The head bolts 47, nuts 48, and vibration isolators 38 are attached to the head bolts 47, nuts 48, and vibration isolators 38, which are attachment members for attaching the respective attachment portions 43 of the pair of left and right rising portions 44 to the machine frame 13 side. Deformation prevention part 5 for preventing deformation of each attachment part 43 in the left-right direction by the metal cylinder body 40
2 is formed, and the deformation preventing portion 52 allows the mounting portions 4
The three comrades are connected to each other, thereby preventing deformation in the left-right direction of each mounting portion 43 without a connecting portion 43.

According to the configuration of the above embodiment, the upper end of the rising portion 44 of the bracket 37 is connected by the connecting portion 45, so there is no risk of bending in the left and right direction, and the shape retention of the bracket 37 is extremely high. Get better. Further, since the rising portion 44 is long in the front-rear direction and its lower end edge is welded to the rotary cover 29, the bracket 37 effectively functions as a rib for reinforcing the rotary cover 29. To manufacture the bracket 37, as shown in FIG. 7, a steel plate is punched out to have a pair of rising parts 44 and a connecting part 45, and the rising part 44 is bent from the connecting part 45 along the dotted line a. The bracket 37 can be easily manufactured, and even if the rising part 44 is long in the front-rear direction, the lower end edge of the rising part 44 can be easily curved along the upper surface of the rotary cover 29 during punching.

In the embodiment described above, the mounting portion 43 of the bracket 37 is located at the front end of the rising portion 44, but the mounting portion 43 may be provided at the rear end of the rising portion 44 instead.

According to the present invention, the bracket for attaching the rotary cover to the machine frame includes a pair of rising parts having a mounting part at one end, and a connecting part connecting the upper ends of the pair of rising parts to the left and right sides excluding the mounting parts. Since the bracket is integrally formed with a U-shaped cross section, the connecting portion can prevent the bracket from bending in the left-right direction, and the rotary cover can be reliably attached to the machine frame without fear of rattling. Further, since the rising portion is long in the front-rear direction and its lower edge is fixed to the upper surface of the rotary cover, the bracket effectively functions as a rib of the rotary cover and can strongly reinforce the rotary cover. Moreover, even if the rotary cover is curved in the front-rear direction, the lower end of the rising part can be easily bent to accommodate the rotary cover, and even though the rising part is long in the front-rear direction,
The bracket can be easily manufactured and fixed to the rotary cover.

Further, since the rising portion 44 is fixed to the upper surface of the rotary cover 29 so as to form a passage 51 penetrating in the front-rear direction between the bracket 37 and the rotary cover 29, mud etc. thrown up by the tilling portion 25 can be removed. If it sticks to the bracket 37 or
Even if mud gets in between the rotary cover 29 and the rotary cover 29, the mud can be smoothly discharged through the passage 51 and the left and right outside of the bracket 37.
There will be no inconvenience such as a large amount of mud adhering to the surface.

In addition, the mounting members for mounting the respective mounting portions 43 of the pair of left and right rising portions 44 on the machine frame 13 side,
Since the deformation prevention part 52 that connects the mounting parts 43 to each other so as to prevent the deformation of each mounting part 43 in the left-right direction is formed, since there is no connecting part 45 in the mounting part 43 part, the mounting part 43 Although it is easy to attach the attachment part 43 to the machine frame 13 side using the attachment member, the deformation prevention part 52 can effectively prevent the attachment part 43 from being deformed in the left-right direction. It can be reliably and easily attached to the machine frame 13 side, and its practical effects are significant.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional example, FIG. 2 is a perspective view showing another conventional example, FIG. 3 is a side view showing an embodiment of the present invention, FIG. 4 is a partially exploded rear view of the same, and FIG. Figure 5 is a back sectional view of the same main part, Figure 6 is a perspective view of the same main part,
FIG. 7 is a plan view for explaining the manufacturing process of the bracket. 11... rotary tillage device, 25... tillage section,
29...Rotary cover, 37...Bracket,
43...Mounting part, 44...Rising part, 45...
Connecting part.

Claims (1)

[Scope of utility model registration request] Rotary cover 29 that covers the top of the tilling section 25
is attached to the machine frame 13 via the attachment part 43 of the bracket 37 fixed on the rotary cover 29, in which the bracket 31 is attached to the machine frame 13.
A cross-sectional shape is formed by a pair of left and right rising parts 44 that are long in the front-back direction and have a mounting part 43 at one end, and a connecting part 45 that connects the upper ends of the pair of rising parts 44 to the left and right sides except for the mounting part 43. The bracket 37 and the rotary cover 2 are integrally formed in the shape of a letter.
The lower end edges of each rising portion 44 are fixed to the upper surface of the rotary cover 29 so as to form a passage 51 penetrating in the front-rear direction between the mounting portions 43 of the pair of left and right rising portions 44. A rotary cover characterized in that a mounting member for mounting on a machine frame 13 side is formed with a deformation prevention part 52 that connects the mounting parts 43 to each other so as to prevent the mounting parts 43 from deforming in the left-right direction. mounting structure.