JP4757983B2 - Separable gearbox and mold for half box casting - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a separation type gear box that secures a space in which the gear mechanism can be accommodated inside two half boxes by combining the open surfaces of the two half boxes, and a half box. The present invention relates to a casting mold.
[0002]
[Prior art]
Conventionally, this type of separable gearbox is widely used because it is easier to cast than an integrated gearbox and further facilitates the assembly of a gear mechanism housed therein. For example, when the gear mechanism has a multistage (for example, three or more stages) increase / decrease structure, it is extremely difficult to assemble in a closed integrated gearbox. Has become commonplace.
[0003]
FIG. 10 shows a conventional separated gear box 10 (hereinafter referred to as gear box 10).
[0004]
The gear box 10 includes first and second half boxes 12 and 14 having different shapes. Each of the half boxes 12 and 14 is substantially a rectangular parallelepiped, and one surface thereof is an open surface 16 or 16 without a lid. Therefore, a space in which the gear mechanism can be accommodated in the first and second half boxes 12 and 14 by combining the open surfaces 16 and 16 of the first and second half boxes 12 and 14 in an overlapping manner. Is secured. In addition, the open surfaces 16 and 16 are parallel to the longitudinal direction L in the rectangular parallelepiped.
[0005]
In this gear box 10, the surfaces parallel to the longitudinal direction L and parallel to the open surface 16 are the upper surface 10A and the lower surface 10B, and the surfaces parallel to the longitudinal direction L and perpendicular to the open surface 16 are both side surfaces 10C. A surface orthogonal to both L and the open surface 16 will be referred to as both short surfaces 10D.
[0006]
In the rectangular parallelepiped first half box 12, there are four outer vertical surfaces 12 </ b> A to 12 </ b> D that are perpendicular to the open surface 16 as shown in an enlarged view in FIG. 11. A vertical installation plane portion 18 that enables installation to an external member is formed on both of the set of surfaces 12A and 12C parallel to the longitudinal direction L of these outer vertical surfaces 12A to 12D. A bolt hole 18 </ b> A is formed through the vertical installation plane portion 18.
[0007]
An inspection port 20 is formed in the outer parallel surface 12E parallel to the open surface 16, 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, the lubricating oil is replenished and the internal gear mechanism is inspected via the inspection port 20.
[0008]
Similarly, as shown in FIG. 12, the second half box 14 has four outer vertical surfaces 14 </ b> A to 14 </ b> D that are perpendicular to the open surface 16, but unlike the first half box 12, There is no vertical installation plane. On the other hand, on the outer parallel surface 14E that is parallel to the open surface 16, a parallel installation plane portion 24 that enables installation to an external member is formed. A bolt hole 24A is formed through the parallel installation plane portion 24, and a foundation bolt embedded in a foundation (which is an external member) is inserted.
[0009]
In the gear box 10 shown in FIG. 10, the vertical installation plane part 18 formed in the first half box 12 is not used for installation, and the parallel installation plane part 24 formed in the second half box 14. Only used. That is, it can be said that the first half box 12 has a role of providing the inspection port 20, not a role of providing the installation surface. As a result, the gear box 10 can be installed only by the lower surface 10B.
[0010]
In order to realize the installation on the other surface, as shown in FIG. 13, two first half boxes 12 are prepared, and the gear box 30 is assembled by combining the open surfaces 16 so as to overlap each other. To configure. If it does in this way, it will become possible to install in an external member by the vertical installation plane part 18 which both the half boxes 12 provide. That is, in this gear box 30, installation can be performed on opposite side surfaces 10C (external vertical surfaces 12A, 12C: see FIG. 11).
[0011]
As a result, by using the first and second half boxes 12 and 14 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]
[Problems to be solved by the invention]
However, in these gearboxes 10 and 30, it is not possible to provide three or more installation surfaces at the same time. For example, in the installed state of the gear box 10 shown in FIG. 10, it is not possible to place other mechanical equipment such as another gear box on the upper surface 10A (where the inspection port 20 is formed). The reason is that, in addition to the fact that the installation plane portion is not prepared on the upper surface 10A in the first place, the inspection lid 22 protrudes and becomes an obstacle.
[0013]
Further, when the installation space is extremely small, it is necessary to perform “vertical installation” with the short surface 10D side down, but an installation plane portion is formed on the short surface 10D of the gearboxes 10 and 30. There was no such installation.
[0014]
Furthermore, since the first and second half boxes 12 and 14 have different shapes, each must be cast using a dedicated mold, which increases the manufacturing cost.
[0015]
The present invention has been made in view of the above-described problems, and it is an object of the present invention to make it possible to realize various installation modes in a separate gear box and to reduce manufacturing costs.
[0016]
[Means for Solving the Problems]
The present invention is provided with two half boxes that are substantially rectangular parallelepiped and one side is an open face without a lid, and the open faces of the respective half boxes are combined to overlap each other. In a separable gearbox that secures a space capable of accommodating the gear mechanism in one half box, at least three of the four outer vertical faces that are perpendicular to the open face when the two half boxes are combined. A vertical installation plane part that can be installed on the external member is formed on the surface, and a parallel installation plane part that can be installed on the external member on both of the two outer parallel surfaces that are parallel to the open surface, Further, a recess recessed from the parallel installation plane portion to the center side of the gear box is formed, and an inspection port for inspecting the inside of the gear box is provided in at least one of the recesses formed in the two outer parallel surfaces. Opened and shields this inspection port The depth of the concave portion with respect to the installation plane portion is set so that the inspection lid can be attached and the inspection lid is completely accommodated in the concave portion when the inspection lid is attached to the inspection port. Further, the two halved boxes have substantially the same shape except for the inspection port and the inspection lid with the open surface in a state of being combined with each other as a symmetrical surface. To achieve.
[0017]
The inventor forms the installation plane portion on all three surfaces (outer vertical surfaces) perpendicular to the open surface in the gear box and two surfaces (outer parallel surfaces) parallel to the open surface, The gearbox has a structure that can always provide a total of five installation surfaces, and further, recesses are formed on both of the outer parallel surfaces.
[0018]
This recess is used for the inspection port, but even when the inspection lid is installed, the inspection lid is set so that it does not protrude outward from the installation plane. There is no such thing.
[0019]
Since it is sufficient to have only one inspection port in the gear box, it seems that forming two recesses in this way seems to be useless, but in this way the difference in whether or not the inspection port is formed is determined. Except for this, the two half boxes can be made to have almost the same shape. This leads to sharing of the mold and can greatly reduce the manufacturing cost.
[0020]
That is, it can be manufactured at a lower cost than the prior art, and the degree of freedom of installation is greatly improved.
[0021]
When realizing such a gear box, specifically, for example, an installation recess that is recessed toward the center of the gear box is formed near the corner of the outer vertical surface where the vertical installation plane is formed, A first bolt hole penetrating through the vertical installation plane portion of the other outer vertical surface adjacent to the outer vertical surface where the installation recess is formed in the installation recess, and the outer vertical surface where the installation recess is formed A second bolt hole penetrating the parallel installation plane portion of the outer parallel surface adjacent to the second parallel hole, and a third bolt hole extending to the open surface side and used to connect the two half boxes. It is preferable to make it formed.
[0022]
The separable gearbox 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. Bolt holes must be prepared on the open side. Accordingly, it is necessary to form a plurality of recesses in the outer vertical surface or the like and to form bolt holes (corresponding to the third bolt holes here) penetrating toward the open surface side in the recesses.
[0023]
The inventor paid attention to the necessity of the recess (installation recess), and further formed the first and second bolt holes in two directions toward the outside. If it does in this way, a bolt hole can be easily provided in both the perpendicular | vertical installation plane and parallel installation plane which have a right angle relationship with an installation recessed part, and the enlargement of a gear box can be suppressed.
[0024]
Moreover, what is necessary is just to use the following molds in order to manufacture the said gear box.
[0025]
Specifically, it is a mold for casting a half box in a separate gear box, and the outer shape coincides with the inspection port formed in the outer parallel surface of the separate gear box according to the invention. However, by installing the core, the half box in which the inspection port is formed is cast, and the inspection port is formed by removing the core. The half box that has not been cast is cast, and the separation type gear box according to the invention can be cast by one mold.
[0026]
According to the mold according to the present invention, since the attachment type core is employed, it is possible to cast two half boxes with only one mold. This is because, as already described, the two-half box in the separated gear box according to the present invention can have almost the same shape except for the inspection port. As a result, the manufacturing cost is greatly reduced.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, examples of embodiments of the present invention will be described in detail with reference to the drawings.
[0028]
FIG. 1 shows a separation-type gearbox 100 (hereinafter referred to as a gearbox) according to an embodiment of the present invention.
[0029]
The gear box 100 includes first and second half boxes 112 and 114, each of the half boxes 112 and 114 is substantially a rectangular parallelepiped, and one surface thereof is an open surface 116 and 116 having no lid. Has been. Therefore, a space in which the gear mechanism can be accommodated inside the first and second half boxes 112 and 114 by combining the open surfaces 116 and 116 of the first and second half boxes 112 and 114 in an overlapping manner. Is secured. In addition, the open surfaces 116 and 116 are parallel to the longitudinal direction L of the rectangular parallelepiped.
[0030]
In this gear box 100, two surfaces that are parallel to the longitudinal direction L and parallel to the open surface 116 are two surfaces that are parallel to the upper surface 100A and the lower surface 100B and that are parallel to the longitudinal direction L and orthogonal to the open surface 116. Are referred to as both short surfaces 100D and 100D. The two surfaces orthogonal to both the side surfaces 100C and 100C and the longitudinal direction L and the open surface 16 are referred to as both short surfaces 100D and 100D.
[0031]
Next, the first and second half boxes 112 and 114 will be described in detail. Since they have almost the same shape, the first half box 112 will be mainly described. Only differences from the half box 112 will be described.
[0032]
As shown in an enlarged view in FIG. 2, the first half box 112 that is a rectangular parallelepiped has four outer vertical surfaces 115 </ b> A to 115 </ b> D that are perpendicular to the open surface 116, and at least 3 in these surfaces. A vertical installation plane part 118 is formed on one surface.
[0033]
Specifically, a vertical installation plane portion 118 that enables installation to an external member is formed on both of the set of surfaces 115A and 115C parallel to the longitudinal direction L of the four outer vertical surfaces 115A to 115D. . Similarly, a vertical installation plane portion 118 is formed on both of the pair of outer vertical surfaces 115B and 115D orthogonal to the longitudinal direction L. A semicircular cutout 140 is formed on the outer vertical surface 115D, and is accommodated inside in a state of being combined with the cutout 140 similarly formed in the second half box 114. The input shaft of the gear mechanism that can be penetrated to the outside. Therefore, when a motor or the like is attached to the outer vertical surface 115D, the vertical installation plane portion 118 does not have to be formed.
[0034]
Bolt holes are formed through the vertical installation plane portion 118 formed on these four surfaces (details will be described later), and for example, a foundation bolt embedded in a foundation (which is an external member) is inserted therein. The
[0035]
Three semicircular arc-shaped notches 142 having different sizes are formed on the edge of the set of outer vertical surfaces 115A and 115C on the open surface 116 side. Similarly to the above-described notch portion 140, this notch portion 142 is combined with the notch portion 142 similarly formed in the second half box 114, and the input / output of the gear mechanism housed inside is provided. The shaft can protrude. In the present embodiment, the gear mechanism having at least two stages of speed increasing / decreasing structures can be accommodated by the three sizes of the notch portions 142, but the present invention is not limited thereto, and four or more or two or less cutting mechanisms are accommodated. It can be a missing part.
[0036]
Further, in the first half box 112, a parallel installation plane portion 124 that can be installed on an external member on an outer parallel surface 115 E that is parallel to the open surface 116, and the gear box 100 from the parallel installation plane portion 124. A recessed portion 146 that is recessed toward the center side (inner side) is formed.
[0037]
An inspection port 120 for inspecting the inside of the gear box 100 is opened in the recess 146, and an inspection lid 122 that shields the inspection port 120 can be attached by a bolt. The degree of depression of the recess 146 is set so that the inspection lid 122 is completely accommodated in the recess 146 when the inspection lid 122 is attached to the inspection port 120. That is, the inspection lid 122 is set so as not to protrude outward from the parallel installation plane portion 124.
[0038]
As shown in an enlarged view in FIG. 3, a set of outer vertical surfaces 115 </ b> A and 115 </ b> C parallel to the longitudinal direction L is formed with a mounting recess 148 that is recessed toward the center of the gear box in the vicinity of the corner. Specifically, it is formed at a “corner” close to both the outer vertical surface 115B (where the vertical installation plane portion 118 is formed) and the outer parallel surface 115E, and the installation recess 148 includes the outer vertical surface 115B. The first bolt hole 150 that can penetrate the vertical installation plane portion 118, the second bolt hole 152 that can penetrate the parallel installation plane portion 124 of the outer parallel surface 115E, and the two half boxes extending to the open surface 116 side. A third bolt hole 154 used to connect 112 and 114 is formed.
[0039]
Returning to FIG. 2, similarly, a mounting recess 156 is formed in the opposite corner, but a hole corresponding to the third bolt hole 154 is not formed. That is, only the first and second bolt holes 152 are formed.
[0040]
Second mounting recesses 160 are formed in the ridge region where the outer vertical surface 115B and the outer parallel surface 115E abut and the ridge region where the outer parallel surface 115E and the outer vertical surface 115D abut, respectively. A fourth bolt hole 162 that can penetrate through the vertical installation plane portion 118 of the surface 115A and the outer vertical surface 115C is formed.
[0041]
Foundation bolts embedded in the foundation (which is an external member) are inserted into the bolt holes formed through the installation plane portions 124 and 118, and the gear box 100 is installed by fixing with a nut. .
[0042]
The second half box 114 has almost the same shape as the first half box 112 as shown in FIG. Specifically, in a state where the first and second half boxes 112 and 114 are connected, the opening surface 116 is a symmetrical surface and the shape is substantially symmetrical. As a different point, although the concave portion 146 is formed on the outer parallel surface 115E, the inspection port is not formed there. This is because one inspection port is sufficient for the entire gear box 100. Of course, inspection ports may be formed in both the first and second half boxes 112 and 114 so as to have a completely symmetrical shape. In addition, about the structure of another part and member, the detailed description is abbreviate | omitted by attaching | subjecting the same code | symbol as the 1st half box 112. FIG.
[0043]
Next, the operation will be described.
[0044]
In this gear box 100, as shown in FIG. 1, at least the installation modes of installation (1) to installation (5) are realized. Actually, it is vertically installed on a total of six surfaces: four surfaces perpendicular to the open surface 116 (here 115A, 115B, 115C, 115D) and two surfaces parallel to the open surface (outer parallel surfaces 115E, 115E). Since the plane part 118 and the parallel installation plane part 124 are formed, the gearbox 100 can always provide a total of six installation modes.
[0045]
For example, the gearbox 100 is installed in the state shown in FIG. 5 by the lower surface 100B, and is installed as shown in FIG. 6 by both side surfaces 100C and 100C, and is shown in FIG. 7 by both short surfaces 100D and 100D. It is installed as follows. Therefore, various installation modes can always be realized without considering a combination of two kinds of half boxes as in the prior art.
[0046]
Since the inspection lid 122 is set so as not to protrude outward from the parallel installation plane 124, installation on the outer parallel surface 115E side on which the inspection lid 122 is installed is possible. As a result, as shown in FIG. 8, the two gearboxes 100 can be arranged in two stages.
[0047]
Since it is sufficient that one inspection port is provided in the gear box, forming the two concave portions 146 and 146 as in the present embodiment seems to be useless. Except for the difference of whether or not the inspection port 120 is formed, the first and second half boxes 112 and 114 can be formed in almost the same shape. This leads to sharing of the mold and can greatly reduce the manufacturing cost.
[0048]
A mold for manufacturing the gear box 100 will be described.
[0049]
As schematically shown in FIG. 9, the mold 200 has a space 202 that is the same as the first or second half box 112, 114 formed therein. A core 204 having the same outer shape as the inspection port 120 formed in the recess 146 of the box 112 is detachable.
[0050]
Accordingly, when the core 204 is installed, the first half box 122 in which the inspection port 120 is formed is cast, and when the core 204 is removed, the second inspection port is not formed. The half box 114 is cast. That is, the separation-type gearbox 100 of this embodiment can be cast with one mold 200. As a result, the manufacturing cost is greatly reduced.
[0051]
【The invention's effect】
According to the present invention, various installation modes can be provided in spite of the reduced 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 an installation surface in the separation type gear box. Fig. 4 is a partially enlarged view of the structure of Fig. 4. Fig. 4 is a development view showing a second half box in the separable gear box. Fig. 5 is an overall view showing an installation mode of the separable gear box. FIG. 7 is an overall view showing an installation mode of the separable gear box. FIG. 8 is an overall view showing an installation mode of the separable gear box. FIG. FIG. 10 is a development view showing a conventional separation type gear box. FIG. 11 is a development view showing a first half box in the separation type gear box. FIG. 13 is a development view showing a second half box in the separated gear box. FIG. 13 shows a conventional release gear box by combining two first half boxes. Development view showing DESCRIPTION OF SYMBOLS
DESCRIPTION OF SYMBOLS 100 ... Separable gear box 112 ... 1st half box 114 ... 2nd half box 115A, 115B, 115C, 115D ... Outer vertical surface 115E ... Outer parallel surface 116 ... Opening surface 118 ... Vertical installation plane part 120 ... Inspection port 122 ... Inspection lid 124 ... Parallel installation plane part 146 ... Recess 148 ... Installation recess 150 ... First bolt hole 152 ... Second bolt hole 154 ... Third bolt hole

Claims (3)

By providing two half boxes that are substantially rectangular parallelepiped and one side is an open face without a lid, the open faces of each half box are overlapped and combined to form the two half boxes In a separate gear box that secures a space in which the gear mechanism can be stored,
When the two half boxes are combined, at least three of the four outer vertical surfaces perpendicular to the open surface are formed with vertical installation plane portions that can be installed on an external member, and the open A parallel installation plane part that can be installed on an external member and a recessed part that is recessed toward the center of the gear box from the parallel installation plane part are formed on both of the two outer parallel planes that are parallel to the plane.
An inspection port for inspecting the inside of the gear box is opened in at least one of the recesses formed in the two outer parallel surfaces, and an inspection lid that shields the inspection port can be attached, and
The depth of the concave portion with respect to the installation plane portion is set so that the inspection lid is completely accommodated in the concave portion when mounted on the inspection port,
The separation type gear box, wherein the two half boxes have substantially symmetrical shapes except for the inspection port and the inspection lid, with the open surface in a state of being combined with each other as a symmetrical surface. In claim 1,
In the vicinity of the corner of the outer vertical surface where the vertical installation plane portion is formed, an installation recess that is recessed toward the center side of the gear box is formed,
A first bolt hole penetrable in the vertical installation plane portion of the other outer vertical surface adjacent to the outer vertical surface where the installation recess is formed in the installation recess, and the outer vertical where the installation recess is formed. A second bolt hole penetrating the parallel installation plane portion of the outer parallel surface adjacent to a surface, and a third bolt hole extending to the open surface side and used to connect the two half boxes A separation-type gearbox characterized by being formed. In the separation-type gearbox according to claim 1 or 2, a mold for casting the half box,
A core whose outer shape coincides with the inspection port formed on the outer parallel surface of the separation-type gearbox is prepared so as to be detachable.
By installing the core, the half box in which the inspection port is formed is cast, and by removing the core, the half box in which the inspection port is not formed is cast. A mold for casting a half box, wherein the separation type gearbox can be cast by one mold.

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