JPS606681Y2 - Seal structure of transmission case cover in side drive type rotary work machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sealing structure for a transmission case cover of a side drive type rotary working machine capable of extending spinning.

For rotary work machines that are equipped with an extension claw shaft on the outside of the transmission case, a hole for inserting the extension claw shaft is formed in the transmission case cover.In order to prevent lubricant oil from leaking from this hole, A sealing member is arranged nearby.

This sealing member fits into the boss part of the sprocket that transmits power to the pawl shaft or the end of the extension pawl shaft, and is also fitted and supported within an annular support member with a cross-section shaped like an angular shape provided on the inner surface of the transmission case cover. There is.

Conventionally, one side of the annular support member and the inner surface of the transmission case cover have been bonded by applying adhesive and spot welding, and since there is little surface to which adhesive is applied, oil leakage may occur from the bonded portion. be.

In view of the above-mentioned conventional problems, the present invention is a side-drive type rotary rotary rotary rotary rotary motor in which a seal ring is arranged to seal between the inner surface of the transmission case cover and the support member, and this seal ring is configured to prevent oil leakage. The purpose of the present invention is to provide a sealing structure for a transmission case cover in a working machine.

The present invention forms an extension shaft insertion hole in the transmission case cover, arranges an annular support member concentric with the insertion hole near the insertion hole on the inner surface of the cover, and connects the support member to the cover. The side has an annular flange portion joined to the inner surface and a cylindrical portion protruding from the outer periphery of the flange portion into the inside of the cover. In the seal structure of the transmission case cover of a drive-type rotary work machine, a seal is formed between the outer circumferential surface of the cylindrical portion and the radially outward vicinity of the cylindrical portion on the inner surface of the cover so as to be concentric with the support member and in contact with both. An annular support is interposed, and a seal ring is interposed between a part of the corner of the support member, the support, and the inner surface of the cover to seal between the flange portion and the inner surface of the cover. do.

In the present invention, instead of the extension claw shaft, a power take-off shaft provided with a transmission means such as a pulley for driving another working machine may be used as the extension shaft.

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a side-drive type rotary working machine, which is connected to a tractor (not shown) via a three-point ring or other link mechanism 2. As shown in FIG.

The working machine 1 has a pair of lower link brackets 5 fixed in the longitudinal direction to both ends of a support 4 having a transmission case portion 3 bulged in the center, and a support body 7 having a transmission case 6 on each bracket 5, and a support frame. 8 and 8 are respectively welded, and the transmission case 6 and the support frame 8 are disposed correspondingly on both sides.

A bearing case 1 is located below the transmission case 6 and the support frame 8.
Each case 10.11 is detachably supported by a bolt, and an end shaft 16 having a flange 16a is supported on each case 10.11 via a ball bearing 14 so as to be relatively rotatable around a horizontal horizontal axis. 1 nail between 16a
8 pawl shafts 19 are fastened with bolts 20 (only the inside of the bearing case 10 side is shown).

22 is an input shaft, 23 is an output shaft, and the power received from the input shaft 22 is transmitted to the rotary transmission body 26 via the output shaft 23 and a chain or the like inside the transmission case 6.

The rotary transmission body 26 has a boss portion 27 spline-fitted to the end shaft 16, and the rotation of the rotary transmission body 26 is caused by the end shaft 1.
6 (forming one end of the claw shaft 19), the claw shaft 19 rotates.

A circumferential recess 16b is formed on the outer end surface of the end shaft 16, and a blind screw 16c is provided at the axial center.

When the boss portion 27 is spline-fitted onto the end shaft 16, a spline fitting portion 27a with an open outer end is formed on the boss portion 27, and in the case of standard spinning, a spline fitting portion 27a is formed in the fitting portion 27a as shown in FIG. When the connecting bodies 33 are used for extended spinning, connecting bodies 34 each having a flange-shaped extension pawl shaft mounting portion 34a shown in FIG. 5 are spline-fitted to be replaceable.

Connectors 33 and 34 both have recesses 33a, 34b for bolts 35, 36 and a circumferential recess 16b.
The connecting body 33 is completely fitted into the fitting part 27a, but the connecting body 34 is fitted so that its mounting part 34a is located outside the transmission case cover 31, and is extended. One end of the shaft 40 is formed.

The bolts 35, 36 are both tightened by the blind screw 16c to fasten the coupling body 33, 34 to the end shaft 16, but the blind screw 1
If the depth of 6c is increased, the long and short bolts shown in the figure are 35.3
6 can be shared by a long bolt 36.

A sealing member 37 is fitted between the inner peripheral surface of the annular support member 38 fixed to the transmission case cover 31 and the outer peripheral surface of the boss portion 27 to prevent leakage of lubricating oil stored in the transmission case 6. There is.

The annular support member 38 is concentric with an insertion hole 31b, which will be described later, and includes an annular flange portion 33a joined to the inner surface 31a of the transmission case cover 31, and an annular support member 38 that projects inside the transmission case cover 31 from the outer peripheral portion of the flange portion 38a. The flange portion 38a and the inner surface 31a of the transmission case cover 31 are joined by applying adhesive and spot welding.

The transmission case cover 31 has an insertion hole 3 for the connecting body 34.
1b is bored, and during standard spinning shown in FIG. 3, this insertion hole 31b is covered with a cap 39 made of an elastic material.

In FIG. 5, the extension shaft 40 (extension claw shaft) is attached to the mounting portion 34.
The claw shaft 40 is removably attached to the claw shaft 19 with a bolt or the like, and the claw shaft 40 is concentrically connected to the claw shaft 19.

In the first embodiment of the present invention shown in FIGS. 3 and 4, it is formed by an inner surface 31a of a transmission case cover 31 and an outer circumferential surface of a support member 38 joined to the inner surface 31a at six spot welds B. A seal ring 43 is fitted to the corner portion between the two, that is, the outer periphery of the joint portion A, and an annular seal support 44 is fitted concentrically so as to press the seal ring 43 toward the joint portion A. , is brought into contact with the outer circumferential surface of the cylindrical portion 38b and a portion of the inner surface 31a of the transmission case cover 31 near the radially outer side of the cylindrical portion 38b.

This seal support 44 has three spot welds C protruding from the outer periphery, and the spot welds C are spot welded to the inner surface 31a, and the inner surface 44b of the circumferential part is spot welded (adhesive is applied) to the support member 38, respectively. It is also possible to apply a coating).

The support member 38 may be formed by integrally molding a disc into a shape including the seal support 44 by press molding.

By arranging the seal ring that seals between the inner surface 31a of the transmission case cover 31 and the flange portion 38a, oil leakage from the joint between the transmission case cover 31 and the support member 38 is reliably prevented.

In the second embodiment of the present invention shown in FIG. 5, the seal support 46 has a female thread formed on its circumferential inner surface 46b, and a male thread preformed on the outer circumferential surface of the support member 38. and the side surface 46a is in contact with the inner surface 31a of the transmission case cover 31. In this contact state, the seal ring 43 fitted on the outer periphery of the joint part A is connected to the transmission case cover 31 and the support member. 38 and the seal supporter 46 to hold the seal under compression.

According to this second embodiment, the seal ring 43 is replaceable.

Further, the seal support 46 is prevented from loosening.

1 and 6, reference numeral 51 denotes a soil cultivation device, which includes a traction rod 52 rotatably connected to the support 4, and a support rod 53 provided horizontally at the rear end of the traction rod 52.
It has a soil rod 55 attached to the support rod 53 via a mounting fitting 54, and a soil plate 56 pivotally supported at the lower end of the soil rod 55.

A rear cover 57 is pivotally supported at the rear end of the rotary cover 58, and the rear portion of the rear cover 57 is placed on the soil plate 56.

Normally, the rear cover 57 is curved in the working direction as shown in Fig. 1, and the soil plate 56 and the rear cover 57 are combined with various shapes depending on the purpose, so they do not follow the curved surface of the rear cover 57. In some cases, the rear cover 57 and the soil plate 5
A gap is created between the top edge of the soil plate 6 and the front part of the upper edge of the soil plate 56, and soil may spill from this gap and fill the groove finished with the soil plate 56.

In order to solve this problem, an elastic plate 58 made of rubber, vinyl, etc. is provided at the top of the top of the soil plate 56 (usually shaped like a square in plane) as shown in FIGS. 1 and 6. .

The elastic plate 58 is fixed to the soil plate 56 via a retaining plate 59 and bolts and nuts, and is connected to the soil plate 56 and the rear cover 5.
Even if the gap with 7 changes, it contacts the rear cover 57 in a curved state perpendicular to the working direction so as to follow the rear cover 57 and fill the gap.

By providing the elastic plate 5B above the soil plate 56 in this manner, it is possible to prevent soil from spilling out from between the soil plate 56 and the rear cover 57, and to form grooves with a good finish.

In the present invention constructed as described above, a seal ring is disposed to seal between the flange portion of the support member and the inner surface of the transmission case cover, so that oil leakage from the joint portion between the two can be reliably prevented.

In particular, according to the present invention, the seal ring is also supported by the support member that supports the seal member, so that the support member has two functions: the function of supporting the seal member and the function of supporting the seal ring. With its simple structure,
Oil leakage from the extension shaft insertion hole can be reliably prevented.

In addition, since the annular support of the seal ring is interposed between the outer circumferential surface of the cylindrical portion of the support member and the radially outward vicinity of the cylindrical portion on the inner surface of the transmission case cover, the support provides a cantilevered shape. It is possible to reinforce the distal end side cylindrical portion of the supporting member, which allows the sealing member to reliably perform the sealing action, and the supporter also reinforces the area around the insertion hole in the transmission case cover.

[Brief explanation of drawings]

Fig. 1 is a side view of a side drive type rotary working machine to which the present invention is applied, Fig. 2 is a partially cutaway rear view of the rotary working machine, and Fig. 3 is a cross-sectional explanatory diagram showing the first embodiment of the present invention. ,
4 is a sectional view taken along the line IV-IV in FIG. 3, FIG. 5 is an explanatory sectional view showing the second embodiment of the present invention, and FIG.
-VI line sectional view. 1...Side drive type rotary work machine, 6.
...Transmission case, 16...End shaft, 19
......Claw shaft, 26...Rotating transmission body, 31
......Transmission case cover 31a, ...Inner surface, 31b...Insertion hole, 33.34...
Connecting body, 37... Seal member, 38...
・Support member, 40... Extension claw shaft, 43... Curved seal ring, 44, 46... Seal support, 4
4a, 46a...side, 44b, 46b・song・
Inner surface of circumferential part, A... joint part.

Claims (1)

[Scope of utility model registration request] An extension shaft insertion hole is formed in the transmission case cover, an annular support member is arranged concentrically with the insertion hole near the periphery of the insertion hole on the inner surface of the cover, and the support member is joined to the inner surface of the cover. A side-drive rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary type rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary rotary type rotary rotary rotary rotary rotary rotary rotary type rotary rotary type rotary rotary rotary type rotary rotary type rotary rotary rotary type rotary rotary rotary type rotary rotary rotary type In the seal structure of a power transmission case cover for a work machine, an annular support is provided between the outer circumferential surface of the cylindrical portion and a radially outward vicinity of the cylindrical portion on the inner surface of the cover, the annular support being concentric with the support member and in contact with both. interposed between a part of the corner of the support member, the support, and the inner surface of the cover,
A seal structure of a transmission case cover in a side drive type rotary work machine, characterized by interposing a seal ring to seal between a flange portion and an inner surface of the cover.