JP2002021986A - Separable type gearbox and mold for casting split box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide five installation faces and reduce a manufacturing cost. SOLUTION: A separable type gearbox 100 has split boxes 112, 114 whose one face is an open face 116, respectively. By putting respective open faces together, a space for housing a gear mechanism inside thereof is secured. In the separable type gearbox 100, vertical installation planes 118 are formed on at least three faces of four faces, i.e., outer vertical faces 115A-115D that are vertical to the open faces 116, and parallel installation planes and recesses 146 are formed on both of outer parallel faces 115E that are parallel to the open faces 116, when the split boxes 112, 114 are put together. At least one of two recesses 146 has an inspection opening 120 on which an inspection lid 122 can be disposed, and the depth of the recess part 146 is set so that the recess completely accommodates the inspection lid 122. Further, shapes of the split boxes 112, 114 are approximately symmetrical with each other, excluding the inspection opening 120.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separated gear box which secures a space for accommodating a gear mechanism inside two half boxes by overlapping and combining the open surfaces of two half boxes. , And a mold for casting a half box.

[0002]

2. Description of the Related Art Conventionally, this type of separated gear box has been widely used because it is easier to cast than an integrated gear box and further facilitates assembly of a gear mechanism housed therein. For example, the gear mechanism has multiple stages (for example, three or more stages).
In the case of a reduction gear structure, since it is extremely difficult to assemble in a closed integrated gear box, such a separated gear box is generally employed.

FIG. 10 shows a conventional separated gear box 10 (hereinafter referred to as a gear box 10).

The gear box 10 includes first and second half boxes 12 and 14 having different shapes. Each half box 12,
14 is a substantially rectangular parallelepiped as a whole, and one surface thereof is an open surface 16, 16 without a lid. Therefore, the first and second half boxes 12, 1 are formed by overlapping and combining the open surfaces 16, 16 of the first and second half boxes 12, 14.
A space in which the gear mechanism can be housed is secured inside 4.
In addition, the open surfaces 16 and 16 are in the longitudinal direction L in the rectangular parallelepiped.
Parallel to

In this gear box 10, a surface parallel to the longitudinal direction L and parallel to the open surface 16 is defined as an upper surface 10A and a lower surface 10B, and a surface parallel to the longitudinal direction L and orthogonal to the open surface 16 is defined as both side surfaces 10C. The plane orthogonal to both the longitudinal direction L and the open plane 16 is referred to as both short planes 10D.

As shown in an enlarged view in FIG. 11, the first rectangular box 12 has four outer vertical surfaces 12A to 12D perpendicular to the open surface 16. On both of the pair of surfaces 12A and 12C, which are parallel to the longitudinal direction L in the outer vertical surfaces 12A to 12D, a vertical installation flat portion 18 that enables installation on an external member is formed. A bolt hole 18 </ b> A is formed through the vertical installation flat portion 18.

The outer parallel surface 12E which is parallel to the open surface 16
An inspection port 20 is formed in the inspection port 20, and an inspection lid 22 (see a two-dot chain line) can be installed in the inspection port 20. By removing the inspection lid 22, replenishment of the lubricating oil and inspection of the internal gear mechanism are performed through the inspection port 20.

Similarly, the second half box 14 has four outer vertical surfaces 14A to 14D perpendicular to the open surface 16 as shown in FIG. Unlike this, it does not have a vertical mounting plane.
On the other hand, the outer parallel surface 14E that is parallel to the open surface 16 has
A parallel installation plane portion 24 is formed which enables installation on an external member. The parallel mounting flat portion 24 has a bolt hole 24A.
Are formed therethrough, and a base bolt embedded in a base (which is an external member) is inserted.

In the gear box 10 shown in FIG. 10, the vertical installation flat portion 18 formed on the first half box 12 is not used for installation, and the parallel installation plane formed on the second half box 14 is not used. Only the flat part 24 is used. In other words, it can be said that the first half box 12 has a role of providing the inspection port 20 described above, not a role of providing the installation surface. As a result, the gear box 10 can be installed only on the lower surface 10B.

To realize installation on another surface, as shown in FIG. 13, two first half boxes 12 are prepared, and the open surfaces 16 are combined so that the open surfaces 16 are overlapped with each other. The box 30 is configured. This way,
The vertical mounting flats 18 provided by both halves 12 allow for mounting on an external member. In other words, in this gear box 30, both opposing side surfaces 10C (external vertical surface 12C).
A, 12C: see FIG. 11).

As a result, the first and second half boxes 12, 1
By using 4 in combination, it is possible to obtain an installation state using a total of three surfaces of the lower surface 10B and both side surfaces 10C and 10C of the gear box.

[0012]

However, these gear boxes 10 and 30 cannot simultaneously provide three or more mounting surfaces. For example, in the installation state of the gear box 10 shown in FIG. 10, it is not possible to mount further mechanical equipment such as another gear box on the upper surface 10A (where the inspection port 20 is formed). The reason for this is that, in addition to the fact that no installation flat part is provided on the upper surface 10A,
Because they protrude and hinder it.

If the installation space is extremely narrow,
It is necessary to perform “vertical installation” with the short side 10D side down, but since the short side 10D of the gearboxes 10 and 30 does not have an installation plane portion, such installation is impossible. there were.

Furthermore, since the first and second half boxes 12 and 14 have different shapes, each of them must be cast using a dedicated mold, which increases the manufacturing cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to realize a variety of installation modes in a separation type gear box and to further reduce manufacturing costs.

[0016]

According to the present invention, there is provided a half box having a substantially rectangular parallelepiped shape and one face having an open face without a lid.
A separated gear box that secures a space in which gear mechanisms can be housed inside the two half boxes by overlapping and combining the open surfaces of the respective half boxes. When the split boxes are combined, at least three of the four outer vertical surfaces that are perpendicular to the open surface are formed with vertical installation flat portions that can be installed on an external member, and are parallel to the open surface. A parallel installation plane portion capable of being installed on an external member, on both of the two outer parallel surfaces,
In addition, a recess is formed on the center side of the gear box from the parallel installation flat portion, and at least one of the recesses formed on the two outer parallel surfaces has an inspection port for inspecting the inside of the gear box. The mounting plane is opened so that an inspection lid that covers the inspection opening is attachable, and the inspection lid is completely accommodated in the recess when the inspection lid is mounted on the inspection opening. The depth of the recess relative to the part is set,
Further, the above object is achieved by making the two half-boxes substantially symmetrical to each other except for the inspection port and the inspection lid, with the open surface in the combined state being a symmetrical surface. Is what you do.

The inventor of the present invention forms an installation plane on all three surfaces (outside vertical surfaces) perpendicular to the open surface of the gear box and two surfaces (outside parallel surfaces) parallel to the open surface. Thus, the gear box has a structure capable of always providing a total of five installation surfaces, and furthermore, a concave portion is formed on both of the outer parallel surfaces.

Although this recess is used for an inspection port, even if the inspection lid is installed, the inspection lid is set so as not to protrude outside the installation plane.
It does not hinder the installation of the surface.

Since it is sufficient to provide one inspection port in the gear box, it is considered wasteful to form two recesses in this way. However, in this case, whether the inspection port is formed or not is determined. Except for the difference, the two half boxes can be made almost the same shape. This leads to the sharing of the mold, which can significantly reduce the manufacturing cost.

That is, it can be manufactured at a lower cost than before, and the degree of freedom of the mounting mode is greatly improved.

In realizing such a gear box, specifically, for example, a mounting recess recessed toward the center of the gear box is formed near a corner of the outer vertical surface where the vertical mounting flat portion is formed. A first bolt hole penetrating through the vertical mounting plane portion of the outer vertical surface adjacent to the outer vertical surface in which the mounting concave portion is formed, wherein the mounting concave portion is formed. A second bolt hole penetrating through the parallel installation plane portion of the outer parallel surface adjacent to the outer vertical surface, and a third bolt extending to the open surface side and used to connect the two half boxes. It is preferable that a bolt hole is formed.

The separation type gear box has advantages such as easy manufacture and easy incorporation of the gear structure.
On the other hand, it is necessary to connect the two half boxes with bolts and nuts, and for that purpose, a bolt hole must be prepared on the open surface side. Therefore, it is necessary to form a plurality of recesses in the outer vertical surface and the like, and to form a bolt hole (corresponding to the third bolt hole here) penetrating toward the open surface side in the recess.

The inventor paid attention to the necessity of the concave portion (installation concave portion), and furthermore, the first and the second in the outward direction.
A bolt hole was formed. With this configuration, bolt holes can be easily provided in both the vertical installation plane and the parallel installation plane that are perpendicular to the installation recess, and the gear box can be prevented from being enlarged.

In order to manufacture the gear box, the following mold may be used.

More specifically, the present invention is a mold for casting a half box in a separation type gear box, and the outer shape of the mold matches the inspection port formed on the outer parallel surface of the separation type gear box according to the present invention. A core is prepared so as to be detachable, and by installing the core, the half box having the inspection opening is cast and the inspection is performed by removing the core. The half box without the opening is cast, and the separate gear box according to the present invention can be cast by one mold.

According to the mold of the present invention, since the attachment-type core is employed, only one mold is used.
One half box can be cast. This is because, as already described, it is possible to make the two half-boxes of the separate gear box according to the present invention almost the same shape except for the inspection port. As a result, manufacturing costs are greatly reduced.

[0027]

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

FIG. 1 shows a separation type gear box 100 (hereinafter referred to as a gear box) according to an embodiment of the present invention.

The gear box 100 includes first and second half boxes 112 and 114.
Is substantially a rectangular parallelepiped, and one surface thereof is open surfaces 116 and 116 without a lid. Therefore, by combining the open surfaces 116, 116 of the first and second half boxes 112, 114 in an overlapping manner, a space in which the gear mechanism can be housed inside the first and second half boxes 112, 114. Is secured. The open surfaces 116, 116 are parallel to the longitudinal direction L of the rectangular parallelepiped.

In the gear box 100, two surfaces parallel to the longitudinal direction L and parallel to the open surface 116 are parallel to the upper surface 100A and the lower surface 100B, and are parallel to the longitudinal direction L and orthogonal to the open surface 116. Two sides are 100C on both sides,
100C and two surfaces orthogonal to both the longitudinal direction L and the open surface 16 are referred to as both short surfaces 100D and 100D.

Next, the first and second half boxes 112, 114
Will be described in detail, but since the shapes are almost similar to each other, the first half box 112 will be mainly described, and only the points different from the first half box 112 will be described in the second half box 114. I do.

FIG. 2 shows the first half box 112 which is a rectangular solid.
As shown in an enlarged manner, there are four outer vertical surfaces 115A to 115D that are perpendicular to the open surface 116,
On at least three of these surfaces, a vertical mounting flat portion 118 is formed.

Specifically, the four outer vertical surfaces 115
A set of surfaces 1 parallel to the longitudinal direction L in A to 115D
On both 15A and 115C, a vertical installation flat portion 118 that enables installation on an external member is formed. Also longitudinal direction L
Similarly, a vertical installation flat portion 118 is also formed on both of the pair of outer vertical surfaces 115B and 115D orthogonal to. The outer vertical surface 115D has a semicircular notch 1
The input shaft of the gear mechanism housed therein is capable of penetrating outward in a state where it is combined with a notch 140 similarly formed in the second half box 114. Therefore, when a motor or the like is attached to the outer vertical surface 115D, the vertical installation flat portion 118 need not be formed.

A bolt hole is formed through the vertical installation flat portion 118 formed on these four surfaces (details will be described later), and for example, a base bolt embedded in a base (which is an external member) Is inserted.

Three semicircular notches 142 of different sizes are formed at the edges of the pair of outer vertical surfaces 115A and 115C on the open surface 116 side. This notch 142 is also similar to the notch 140 described above,
In combination with the notch 142 similarly formed in the half box 114, the gear mechanism housed inside is
The output shaft can be projected. In the present embodiment, at least two stages of the gear mechanism having the speed increasing / decelerating structure can be accommodated by the notches 142 having three sizes.
The present invention is not limited to this, and may be four or more or two or less notches.

Further, in the first half box 112, a parallel installation plane portion 124, which can be installed on an external member, and an outer parallel surface 115 E, which is parallel to the open surface 116, and the parallel installation plane portion 124. A recess 146 is formed on the center side (inside) of the gear box 100.

In the recess 146, an inspection port 120 for inspecting the inside of the gear box 100 is opened, and an inspection lid 122 for shielding the inspection port 120 can be attached by bolts. The degree of depression of the recess 146 is
When the inspection lid 122 is attached to the inspection port 120, the inspection lid 122 is set to be completely accommodated in the recess 146. That is, the inspection lid 122 is placed on the parallel
4 is set so as not to protrude outside.

As shown in an enlarged view in FIG. 3, a pair of outer vertical surfaces 115A and 115C that are parallel to the longitudinal direction L have mounting recesses 148 that are recessed toward the center of the gear box near corners. Is done. Specifically, (vertical installation flat part 1
18 are formed at "corners" proximate to both the outer vertical surface 115B and the outer parallel surface 115E, and this mounting recess 148 can penetrate through the vertical mounting flat portion 118 of the outer vertical surface 115B. The first bolt hole 150, the second bolt hole 152 penetrating through the parallel installation plane portion 124 of the outer parallel surface 115E, and the second bolt hole 152 extending toward the open surface 116 are used to connect the two half boxes 112, 114. A third bolt hole 154 is formed.

Returning to FIG. 2, a mounting recess 156 is similarly formed at the opposite corner, but the third bolt hole 15
No hole corresponding to No. 4 was formed. That is, only the first and second bolt holes 152 are formed.

Outer vertical surface 115B and outer parallel surface 115E
The second installation concave portion 160 is formed in the peak region where the outer vertical surface 115A and the peak region where the outer parallel surface 115E and the outer vertical surface 115D abut, respectively.
A fourth bolt hole 162 that can penetrate the vertical installation flat portion 118 of the outer vertical surface 115C is formed.

The bolt holes formed through the installation flat portions 124 and 118 are inserted with foundation bolts embedded in the foundation (which is an external member), and are fixed by nuts so that the gear box 100 can be installed. Has become.

The second half box 114 has almost the same shape as the first half box 112 as shown in an enlarged view in FIG. Specifically, the first and second half boxes 112,
In a state in which the connecting surfaces 114 are connected, the opening surface 116 is substantially symmetrical with the opening surface 116 as a plane of symmetry. The difference is that the recess 146 is formed in the outer parallel surface 115E, but the inspection port is not formed there. The inspection opening is gearbox 10
This is because one is sufficient for all 0s. Of course, inspection ports are formed in both the first and second half boxes 112 and 114,
The shape may be completely symmetric. In addition, about the structure of another part, a member, etc., the detailed description is abbreviate | omitted by attaching the same code | symbol as the 1st half box 112.

Next, the operation will be described.

In this gear box 100, at least the installation modes (1) to (5) are realized as shown in FIG. Actually, four surfaces perpendicular to the open surface 116 (here, 115A, 115B, 115C, 115
D) and two surfaces (outside parallel surfaces 11) parallel to the open surface.
5E, 115E), the vertical installation plane 118 and the parallel installation plane 124 are formed on a total of six surfaces.
00 is always able to provide a total of six installation modes.

For example, the gear box 100 is installed by the lower surface 100B in the state shown in FIG.
6 is installed by 00C and 100C, and is installed by both short surfaces 100D and 100D as shown in FIG. Therefore, various installation modes can always be realized without considering a combination of two types of half boxes as in the related art.

The inspection lid 122 is connected to the parallel installation plane 12.
Because it is set not to protrude outside than 4,
The installation on the outer parallel surface 115E side where the inspection lid 122 is installed is enabled. As a result, as shown in FIG. 8, the two gear boxes 100 can be arranged in a two-tiered manner.

Since only one inspection port is required in the gear box, two recesses 146 and 146 are used as in this embodiment.
It is considered wasteful to form the first and second half boxes 112, 1 and 2 except that a difference is made whether or not the inspection port 120 is formed in the recess 146.
14 can be made almost the same shape. This leads to the sharing of the mold, which can significantly reduce the manufacturing cost.

Next, a mold for manufacturing the gear box 100 will be described.

As schematically shown in FIG.
No. 0 is such that a space 202 identical to the first or second half box 112 or 114 is formed therein, but the inspection port 120 formed in the concave portion 146 of the first half box 112 is formed. A core 204 having the same outer shape as that described above is provided so as to be detachable.

Therefore, when the core 204 is installed, the first half box 122 having the inspection port 120 is cast, and when the core 204 is removed, the inspection port is formed. No second half box 114 is to be cast. That is, the separated gear box 100 of the present embodiment can be cast by one mold 200. As a result, manufacturing costs are greatly reduced.

[0051]

According to the present invention, various installation modes can be provided despite the reduction in manufacturing cost.

[Brief description of the drawings]

FIG. 1 is a development view showing a separation type gear box according to an embodiment of the present invention.

FIG. 2 is a development view showing a first half box in the separation type gear box.

FIG. 3 is a partially enlarged view showing a structure of an installation surface in the separation type gear box.

FIG. 4 is a development view showing a second half box in the separation type gear box.

FIG. 5 is an overall view showing an installation state of the separation type gear box.

FIG. 6 is an overall view showing an installation state of the separation type gear box.

FIG. 7 is an overall view showing an installation state of the separation type gear box.

FIG. 8 is an overall view showing an installation state of the separation type gear box.

FIG. 9 is a schematic view showing a mold for casting the separation type gear box.

FIG. 10 is an exploded view showing a conventional separated gear box.

FIG. 11 is an exploded view showing a first half box in the separation type gear box.

FIG. 12 is a development view showing a second half box in the separation type gear box.

FIG. 13 is an exploded view showing a conventional release gear box formed by combining two first half boxes.

[Explanation of symbols]

 Reference Signs List 100: separated gear box 112: first half box 114: second half box 115A, 115B, 115C, 115D: outside vertical surface 115E: outside parallel surface 116: open surface 118: vertical installation flat portion 120: inspection port 122 ... Inspection lid 124 ... Parallel installation flat part 146 ... Recess 148 ... Installation recess 150 ... First bolt hole 152 ... Second bolt hole 154 ... Third bolt hole

Claims (3)

[Claims] 1. An apparatus according to claim 1, further comprising two half-boxes each having a substantially rectangular parallelepiped shape and one surface being an open surface without a lid, wherein said open surfaces of each half-box are overlapped and combined. In a separation type gear box which secures a space in which a gear mechanism can be stored inside two half boxes, at least four outer vertical surfaces perpendicular to the open surface when the two half boxes are combined. A vertical installation plane portion that can be installed on an external member is formed on three surfaces, and a parallel installation plane portion that can be installed on an external member is provided on both of two outer parallel surfaces that are parallel to the open surface. ,as well as,
A concave portion is formed in the center of the gear box from the parallel installation plane portion, and an inspection port for inspecting the inside of the gear box is opened in at least one of the concave portions formed in the two outer parallel surfaces. In addition, an inspection lid for shielding the inspection port can be attached, and the inspection lid is completely accommodated in the recess when the inspection lid is attached to the inspection port. The depth of the concave portion is set, and the two half boxes are substantially symmetrical to each other except for the inspection port and the inspection lid, with the open surface in a combined state being a symmetric surface. A separation type gear box characterized by the above-mentioned. 2. The installation recess according to claim 1, wherein a recess recessed toward the center of the gear box is formed near a corner of the outer vertical surface where the vertical installation flat portion is formed. A first bolt hole penetrable through the vertical mounting plane portion of another outer vertical surface adjacent to the outer vertical surface where the outer vertical surface is formed, and the outer parallel surface adjacent to the outer vertical surface where the mounting recess is formed A second bolt hole that can penetrate the parallel installation flat portion of the second mounting portion, and a third bolt extending toward the open surface side and used for connecting the two half boxes.
A separation type gear box, wherein a bolt hole is formed. 3. A separation mold box according to claim 1, wherein said inspection box is formed on said outer parallel surface of said separation gear box. A core having the same shape as the mouth is prepared so as to be detachable. By installing the core, the half box having the inspection port is cast and the core is removed. The mold for casting a half box, wherein the half box without the inspection port is cast, and the separate gear box can be cast by one mold.