JPS6128130Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is provided with a shaft through hole, and is divided from the center of the hole and divided across the hole, so that the majority of the total opening area of the hole is divided. The present invention relates to a die-cast transmission case in which a first case occupying a portion of the area and a second case on the other side are connected by a flange via a packing.

In the above case, the split surface is offset from the center of the hole due to layout constraints such as the position of the transmission shaft and the position of the case side flange with respect to the mounting part of various devices from above when the transmission case is assembled to various devices. It is something that has to be done. As a result, one side of the split case is provided with a widening large hole, and due to the mold cutting process, the large hole cannot be directly obtained, and conventionally, as shown in Fig. 6, The large hole portion 32 of the first case 31 is composed of a cutout circular portion 32a symmetrical to the small hole portion 34 on the second case 33 side, and a track-shaped split surface side portion 32b connected thereto. The face side portion 32b was machined to form a perfectly circular hole 35 when both cases 31 and 33 were connected by flanges. However, it had to be finished into a curved surface by machining, requiring high precision, and had the drawback of being extremely labor-intensive and expensive.

In view of the above points, it is an object of the present invention to make it possible to easily and inexpensively manufacture the transmission case without cutting.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

The wheel 1 is mounted on an axis and the steering handle 2 is mounted at the rear.
A pulling device 3, a reaping device 4, a belt with a protrusion 5 for conveying the harvested grain culm to one side of the machine body, a rake packer 6 on the back of the lifting device 3, and A binding device 7 for binding and releasing the collected stem culms is provided to constitute a binder.

In order to drive the lifting device 3, an inclined rotating shaft 8 to which a puller 6 is rotatably attached and a vertical rotating shaft 9 are interlocked and connected via a first chain type transmission mechanism 10, and the vertical rotating shaft 9 and the binding device 7
The constantly rotating shaft 11 and the second chain type transmission mechanism 1
They are interlocked and connected via 2.

The transmission case 13 housing the first chain type transmission mechanism 10 has a hole 1 passing through the vertical rotation shaft 9.
4, it is divided by passing through the center of the hole 14, while the hole 15 passing through the tilted rotating shaft 8 is divided by being deviated from the center of the hole 15. It is composed of first and second cases 16 and 17 made of aluminum die-cast and divided into parts, and the first and second cases 16 and 17 are connected via a packing 18.

The first case 16 is provided with a large hole portion 19 that occupies a majority of the total opening area of the hole 15, and the other second case 17 is provided with a small hole portion 20.

The large hole portion 19 includes a semicircular portion 19a having a virtual center P on the back side of the splitting surface L, and a track-shaped splitting surface side portion 19b connected to the semicircular portion 19a having a width equal to the diameter of the semicircular portion 19a. Consisting of
On the other hand, the small hole portion 20 has a virtual center Q outside the dividing plane L. It is constituted by a notched circular portion 20 which is a cutout of a circle having a radius equal to the radius of the semicircular portion 19a.

The first and second cases 1 are attached to the packing 18.
6 and 17 are connected, the semicircular portion 19a
and the notched circular portion 20, the imaginary circle C, the split surface L, and the side wall 2 of the split surface side portion 19b.
Projections 22, 22 are integrally arranged to fill the spaces S, S formed by 1 and 1.

The split surface side portion 19b may be configured to be wider toward the split surface L side, for example, as shown in FIG.

The transmission case 13 according to the present invention is applicable not only to binders as described above but also to various devices such as working machines and working devices.

Further, the present invention may be provided with one hole 15 in which the dividing surface L is deviated from the center and traverses the hole 15, and in addition to the hole 15, there may be a hole 14 in which the dividing surface L crosses through the center. It can also be applied to types that have two or more.

In summary, the die-cast transmission case according to the present invention has the large hole portion 19 of the first case 16.
is composed of a semicircular portion 19a having a center P on the back side of the splitting surface L, and a splitting surface side portion 19b connected to the semicircular portion 19a having a width equal to or larger than the diameter of the semicircular portion 19a; Small hole part 2 of case 17
0, having a center Q outward from the split surface L,
The semicircular portion 19a is configured with a notched circular portion 20 having a radius equal to the radius of the semicircular portion 19a, and the semicircular portion 19a is connected to the packing 18 with the first and second cases 16 and 17. Protrusions 22, 22 are integrally provided to fill the space S formed by the virtual circle C connecting the cutout circular portion 20, the split surface L, and the side wall 21 of the split surface side portion 19b. It is characterized by certain things.

In other words, the large hole portion 19 of the first case 16 is configured to have a larger opening area than the originally required shaft through hole 15 when combined with the small hole portion 20 of the second case 17 so that die cutting can be performed. After molding, the first and second cases 16 and 17 are formed without any cutting process.
Since the unnecessary space S is filled with the protrusions 22, 22 connected to the gasket 18 used when assembling the gasket 18, the protrusions 22, The transmission case 13 can now be manufactured extremely easily and at low cost by replacing the transmission case 22 with integrally continuous molding.

Therefore, in the past, in order to be able to use an inexpensive transmission case that was split through the center of the hole 15,
Although there were cases where the placement of other devices was restricted, as a result of the present invention, the adverse effect on the placement of other devices due to cost can be suppressed, and it has become possible to manufacture various devices cost-effectively.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the die-cast conduction case according to the present invention, and FIG. 1 is an overall side view of the binder, FIG. 2 is a partially cutaway side view of the main parts, and FIG. 3 is the conduction case in an assembled state. 4 is a front view of the main parts of the conduction case, Fig. 5 is a perspective view of the packing, Fig. 6 is a front view of the main parts of the case showing another embodiment, and Fig. 7 is a conventional example. It is a front view. 15... Shaft through hole, 16... First case, 17
. . . Second case, 18 .
...Side wall, 22...Protrusion, P, Q...Circle center, L...
...Cut plane, C...imaginary circle, S...space.

Claims (1)

[Scope of utility model registration request] A first case 16 that includes a shaft through hole 15, is offset from the center of the hole 15, is divided across the hole 15, and occupies a majority of the total opening area of the hole 15; and the other second case 1
7 are flange-connected via a packing 18, the large hole portion 19 of the first case 16 is connected to a semicircular portion 19a having a center P on the back side of the split surface L, and and a split surface side portion 19b having a width equal to or larger than the diameter of the connected semicircular portions 19a, and on the other hand, the small hole portion 20 of the second case 17 is arranged so that the center Q thereof is outward from the split surface L. and a cutout circular portion 20 having a radius equal to the radius of the semicircular portion 19a.
In a state where the first and second cases 16 and 17 are connected to the packing 18, the virtual circle C connecting the semicircular portion 19a and the cutout circular portion 20, the split surface L, and the A die-cast power transmission case characterized in that projections 22, 22 are integrally arranged to fill a space S formed by a side wall 21 of a split surface side portion 19b.