JPH083209Y2 - Soundproofing equipment for mobile work equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a soundproofing device for a mobile work machine such as a rotary tiller.

(Prior Art) For example, in a rotary cultivator, a rod with a coil spring is attached to a rear part of a cultivating cover, which supports a leveling / combining rear cover which is vertically swingably connected and which applies back pressure. . Further, a support wall is provided on a gauge wheel support frame projecting rearward from the machine frame, and the rod is loosely inserted in a through hole of the support wall so as to be vertically movable, and one end of a coil spring fitted over the rod. One side is supported by the support wall directly or indirectly via a washer, and the other end side is supported by a stopper provided on the rod. An example of this type is described in Japanese Utility Model Laid-Open No. 51-109009.

(Problems to be Solved by the Invention) In the conventional device, the rod moves up and down in accordance with the vertical swing of the rear cover, the coil spring vibrates vertically, and one end of the coil spring collides with the support wall. It hits and makes noise. Further, there is a problem that noise is generated even when the rod and the support wall collide with each other in the through hole due to the vertical swing of the rear cover.

Then, this invention aims at preventing the said noise.

(Means for Solving the Problems) The means taken by the present invention to achieve the above-mentioned object is to insert a cover body 11 for vertically swingably attaching to a mobile work machine into which a rod 36 having a pair of upper and lower coil springs 38 is inserted. A support wall 29 for supporting is provided, and one end side of each of the upper and lower coil springs 38 is supported by the support wall 29 side via the warming member 32 made of an elastic material and the other end side is supported by the stopper 41 side provided on the rod 36, respectively. In the soundproofing device for a mobile work machine, the warm impact member 32 is formed by connecting the pair of wall portions 32a and 32b at one end side to form a U-shaped cross section and sandwiching the support wall 29 so as to be fitted. The wall of the warming member 32 is integrally formed with an annular wall 34 extending between the inner surface of the through hole 31 formed in the support wall 29 and the rod 36 inserted into the through hole 31. It is in.

(Operation) When the mobile work machine travels, the cover body 11 swings up and down, the rod 36 moves up and down, and the coil spring 38 vibrates, which causes noise between the one end side of the coil spring 38 and the support wall 29. The rod 36 in the through hole 31 of the support wall 29, which is prevented by the warming member 32 fitted to the 29, and is vertically swung by the cover body 11.
Noise between the support wall 29 and the support wall 29 causes the rod insertion hole 33 of the warm impact member 32.
Is prevented by an annular wall portion 34 extending between the through hole 31 and the rod 36.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

1 to 4 show the first embodiment. In FIG. 1, reference numeral 1 denotes a rotary cultivator, which is mounted on a tractor (not shown) via a three-point link mechanism 2 so as to be movable up and down. The rotary cultivator 1 is mainly composed of a machine frame 3, a cultivating part 4, a cultivating cover device 5, and the like.

The machine frame 3 has support arms 7 protruding left and right from the case 6, and the side frames 8 are provided at the outer ends of the left and right supports 7.
And a chain case 9 are provided to form a gate shape.

The tillage cover device 5 includes a main cover 10 fixed to the machine frame 3,
The rear cover (cover body) 11 pivotally supported at the rear end of the main cover 10 and a pair of left and right front and rear side covers 12a, 12b are provided to cover the tilling section 4. The rear cover 11 has a leveling cover 13 at the bottom.

The cultivating part 4 includes a claw shaft 14 rotatably supported between the lower part of the side frame 8 and the chain case 9, and a cultivating claw 16 mounted on the claw shaft 14 via a bracket 15 so as to be swingable at a fixed angle. Consists of. Then, power is transmitted from the PTO shaft of the tractor to the pawl shaft 14 via the input shaft 17 of the gear case 6, the transmission shaft 18 in the support arm 7 and the winding transmission mechanism in the chain case 9, and the pawl shaft 14 is connected to the pawl shaft 14. A normal / reverse rotation switching mechanism in the inside is capable of normal / reverse rotation. Further, the plowing claw 16 can be cultivated regardless of whether it is rotated in the forward or reverse direction.

A support frame 19 is provided so as to project from the rear of the machine frame 3.
A gauge wheel 20 is attached to the rear end of the. The support frame 19 is
As shown in FIG. 2, a pair of left and right support rods 21 pivotally supported by the support arm 7 and a connecting rod 22 for connecting the left and right support rods 21.
A pair of left and right extension rods 23 are fitted into the support rod 21 so that the length thereof can be adjusted, and a left-right mounting rod 24 connected to the extension rods 23 is formed in a torii shape. And the connecting rod 22
By rotating the handle 27 of the vertical adjustment screw shaft 26 attached to the central bracket 25, the support rod 21 can be raised and lowered.

A support plate 28 is provided on each of the left and right support rods 21 so as to project outward in the left-right direction. The support plate 28 has a flat support wall 29,
The support wall 29 is formed in a U-shaped cross section from a pair of side walls 30 integrally extending downward from the front and rear edges. The support wall 29 is formed with a through hole 31 which is elongated in the front-rear direction.

32 is a warm shock member, made of elastic material such as rubber or resin,
The upper and lower walls 32a and 32b, which are rectangular in plan view, and the connecting wall 32c that connects them are formed in a U-shaped cross section. The warming member 32 is fitted to the support wall 29 from outside in the left-right direction so that the support wall 29 is sandwiched between the upper and lower walls 32a and 32b. And warm shock member
32 is attached to the support wall 29 by its own elastic force. Also,
The upper and lower walls 32a and 32b have through holes 31 corresponding to the through holes 31 of the support wall 29.
Longer rod-shaped rod insertion holes 33a, 33b are formed. From the peripheral edge of the rod insertion hole 33 of the upper wall 32a to the through hole 3
An annular wall portion 34 is extended in the inside of 1. The annular wall portion 34 covers the entire inner surface of the through hole 31 and abuts against the inner surface of the through hole 31, so that the displacement of the warming member 32 in the horizontal direction is restricted. Inner surfaces of the upper and lower walls 32a, 32b, rod insertion holes 33a, 33b, and annular wall portion 34
An insertion hole 35 is formed by 34a, and the rod 3 is inserted into this insertion hole 35.
6 is movably supported in the vertical direction.

The lower end of the rod 36 is pivotally supported on the upper surface of the rear cover 11 via a bracket 37. In addition, the rod 36 has a warming coil spring 32a on the upper side of the support wall 29 and a lowering coil spring 3 on the lower side.
2b are respectively fitted, and spring receivers 39 are provided at both ends of both coil springs 32a and 32b. And the coil springs 32a, 32b
One end side of the abutment member abuts on the warming member 32, and the other end side abuts on a locking pin (stopper) 41 selectively locked in locking holes 40 formed at equal intervals in the axial direction of the rod 36. ing. As a result, the rear cover 11 is supported and back pressure is applied.

In the above structure, the rod 36 moves up and down following the vertical swing of the rear cover 11 during the tilling work of the rotary cultivator 1, and the coil springs 38a and 38b vibrate up and down accordingly. Noise between the support wall 29 and one end of the coil springs 38a, 38b due to the vibrations of the coil springs 38a, 38b is prevented by the upper and lower walls 32a, 32b of the warming member 32. Further, the noise between the rod 36 and the support wall 29 in the through hole 31 is caused by the annular wall portion 34 of the warming member 32.
Is prevented by.

FIG. 5 shows a first comparative example of the present invention, in which the annular wall portion 32c of the warming member 32 and the side wall 29 of the support plate 28 in the first embodiment are not provided. Also, the warming member 32
The rod insertion hole 38 and the through hole 31 of the support wall 25 are formed to have the same diameter, and the insertion hole 35 is formed by these.

FIG. 6 shows a second comparative example of the present invention, in which the annular wall portion 32c of the warm impact member 32 in the first embodiment is not formed, and the front and rear side surfaces of the lower wall 32b of the warm impact member 32 are supported. The side wall 30 of the support wall 28 serves as a regulation wall, which is in contact with the front and rear side walls 30 of the plate 28, whereby the movement of the warming member 32 in the front and rear direction and around the rod 36 is regulated.

In the first embodiment, the annular wall portion 34 may be appropriately formed with slits or the like, and the annular wall portion 34 may extend from the lower wall 32b of the warming member 32 or both upper and lower walls 32a, 32b. good.
Further, the annular wall portion 34 may be formed thinner than the thickness of the support wall 29.

(Effect of the Invention) According to the present invention, the cover body 11 attached to the mobile work machine in a vertically swingable manner is provided with a rod having a pair of upper and lower coil springs 38.
A support wall 29 for inserting and supporting 36 is provided, and upper and lower coil springs 38
A soundproofing device for a mobile work machine, wherein one end side of the movable work machine is connected to the support wall 29 side via a cushioning member 32 made of an elastic material, and the other end side is connected to a stopper 41 side provided on the rod 36, respectively. The cushioning member 32 is fitted by connecting a pair of wall portions 32a and 32b at one end side to form a U-shaped cross section and sandwiching a support wall 29, and the cushioning member 32 is supported by the wall portion of the cushioning member 32. Since the annular wall portion 34 extending between the inner surface of the through hole 31 formed in the wall 29 and the rod 36 inserted into the through hole 31 is integrally formed, the buffer member 32 is attached to the support wall 29 by itself by sandwiching. While you can
Positioning can also be performed by the annular wall portion 34 in the through hole 31, installation is easy and the number of parts can be reduced, and not only noise between the coil spring and the support wall 29 but also noise between the rod 36 can be prevented. it can.

[Brief description of drawings]

The drawings show an embodiment of the present invention, and FIGS.
An embodiment is shown, FIG. 1 is an overall side view, FIG. 2 is a plan view of a support frame, FIG. 3 is a sectional view taken along the line III-III in FIG. 2, and FIG. 4 is a line IV-IV in FIG. FIG. 5 is a sectional view of an essential part showing a first comparative example, and FIG. 6 is a sectional view of an essential part showing a second comparative example. 1-Rotary tiller, 28-support plate, 29-support wall,
30 ... Side wall, 31 ... Through hole, 32 ... Buffer member, 33 ... Rod insertion hole, 34 ... Annular wall portion, 35 Insertion hole, 36 ... Rod,
38a ... Cushion coil spring, 38b ... Downward coil spring,
41 …… Locking pin (stopper).

Front page continuation (72) Kazumi Umeki 64, Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd., Sakai Factory (72) Inventor Takagi, 64, Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd., Sakai Factory (72) Creator Tsuneno Kimihide 64, Ishizukitamachi, Sakai City, Osaka Prefecture, Kubota Iron Works Co., Ltd., Sakai Factory (72) Creator Takaaki Ohno, 64, Ishizukitamachi, Sakai City, Osaka Prefecture, Kusakada Iron Works Co., Ltd. (56) Reference Literature Jikho 61-12728 (JP, Y2)

Claims (1)

[Scope of utility model registration request] A cover wall (29) for supporting a cover body (11) attached to a mobile work machine in a vertically swingable manner through a rod (36) having a pair of upper and lower coil springs (38), and supporting each of the upper and lower sides. One end side of the coil spring (38) is connected to the support wall (29) side via the cushioning member (32) made of an elastic material, and the other end side is connected to the stopper 41 side provided on the rod (36). A soundproofing device for a mobile work machine, wherein the cushioning member (32) has a pair of wall portions (32a, 32b) connected at one end to form a U-shape and sandwiches the support wall (29). An annular shape extending between the inner surface of the through hole (31) formed in the support wall (29) and the rod (36) inserted in the through hole (31) in the wall portion of the buffer member (32). A soundproof device for a mobile work machine, wherein the wall portion (34) is integrally molded.