JP3348693B2 - Reduction gear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed reducer connected to a motor or the like, and more particularly to a speed reducer mounted on a side of an output shaft as a mounting surface.

[0002]

2. Description of the Related Art When a speed reducer directly connected to an electric motor is mounted and fixed on a mounting surface beside an output shaft, as shown in FIG. 5, an L-shape fixed to a mounting surface on which the output shaft stands upright is used. As shown in FIGS. 6 and 7, a screw hole is drilled and formed by using a thick portion of the side wall of the housing, and the mounting plate 3 is formed by the screw hole and the screw member 4. The fixing method was well known.

The combination of the L-shaped mounting plate 3 of the first example is
Needless to say, an L-shaped mounting plate 3 as a separate member is required, and since the mounting plate 3 is fixedly held via the housing 2-1, a built-in speed reduction mechanism (not shown) There is a reduction in accuracy due to the existence of a connection portion for overlapping and fixing between the speed reduction mechanism and the housing 2-1 and between the housing 2-1 and the mounting plate 3. Thick part 2 of body 2-1
Although it is not shown in the structure in which a screw hole is formed in −11,
Assuming that the thick portion 2-11 has a built-up structure with a special shape or a normal rectangular housing 2-1 as shown in FIG. In addition, although not shown in the drawings, the illustration of the resin casing is omitted, but there are various disadvantages such as the need to use a reinforcing material insert structure from the viewpoint of securing strength in the case of a resin casing that is frequently used in terms of cost. .

[0004]

In the conventional structure as described above, since the connection and fixing of the built-in speed reduction mechanism is performed in the form of interposing a housing or another member, the reliability is high in strength and accuracy. In need of improvement.

[0005]

SUMMARY OF THE INVENTION A reduction gear transmission according to the present invention comprises a housing, a bearing member incorporated in the housing, a gear train rotatably supported by the bearing member, and a gear train. An output shaft connected to the base plate, and a base plate for fitting and holding the bearing member, and at the periphery of the base plate, a bent and raised surface formed from a base plate surface for fitting and holding the bearing member of the base plate is formed. The bent and raised surface forms a mounting means, and has a screw hole formed in the bent and raised surface of the main plate, and a screw member screwed into the screw hole, or another member fitted to the bent and raised surface of the main plate. ,
A screw hole drilled and formed in the separate member, and a screw member screwed into the screw hole, and the connecting member penetrating through the bent and raised surface and the side wall of the housing, the axial direction of the output shaft and It is configured so that it can be fixedly held so as to be attachable in parallel or in any other different orientation.

[0006]

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

FIG. 1 is a perspective view showing a main part of a first embodiment of a speed reducer according to the present invention. Referring to FIGS. 5 and 6, in the same manner as in the above-described related art, an example is shown in which the mounting plate 3 abutting on two side surfaces of the housing 2-1 parallel to the axial direction of the output shaft (not shown) is used. The base plate 2-2 which supports the gear train is provided with two bent-up surfaces 2-
22 (see FIG. 2). Housing 2-1
This is a structure that is fixed to the external mounting plate 3 at substantially the center of the two side surfaces.

FIG. 2 is a partial cross-sectional view of the ground plate 2-2 of the first embodiment. The bent and raised surface 2-22 is formed so as to form a right angle with the ground plate surface 2-21 for fitting and holding the bearing member. And a screw hole 2-2 formed in the bent and raised surface 2-22.
As shown in FIG. 1, the housing 4 is fixed by being screwed into a screw member 4 that penetrates a thin portion at the center of the side surface of the housing 2-1.

In the first example, the screw holes 2-24 formed directly on the bent and raised surface 2-22 of the base plate 2-2 constitute the mounting means. The strength is also high in reliability, and it is easy to improve the accuracy of connection and fixing by directly fixing the main plate 2-2.

Although it is obvious that the details are omitted,
In the configuration where the thickness of 2 is sufficient, there is no need to take care to secure the thread in the burring process as shown in the figure.

FIG. 3 shows a second example. As means for further increasing the effective number of threads in the screw holes of the above-mentioned bent and raised surface 2-22, it is fitted to the bent and raised surface 2-22. FIG. 6 is a perspective view of a main part showing an example in which an auxiliary member 5 is used together. FIG. 4 is a perspective view of the auxiliary member 5 of the example shown in FIG. 3, and a broken line shows a fitting portion of the bent and raised surface 2-22 of the main plate 2-2. The combined use of the auxiliary member 5 is set back in terms of cost and man-hour, but is due to an increase in the number of effective threads for the purpose of increasing the mounting strength.

Also in the second example, the mounting means uses the auxiliary member 5 directly fitted to the main plate 2-2 forming the speed reduction mechanism, and the speed reduction mechanism (not shown) and the housing 2 are mounted inside. -1
Elimination of stacking such as connection and fixation of the housing 2-1 and connection and holding of the housing 2-1 and the external mounting plate 3, so that reliability can be improved and reinforcement of the housing 2-1 itself is not required. It can be.

A bent surface 2-22 which is bent from a base plate surface 2-21 for fitting and holding a bearing of the base plate 2-2.
Are not necessarily formed at a right angle as in the above-described example shown in the figure, and can be appropriately set according to the mounting posture, although illustration and details are omitted.

[0014]

The speed reducer according to the present invention uses the main plate itself constituting the speed reduction mechanism as the mounting means, so that the reliability of the mounting strength is improved and the reliability of the holding of the internal speed reduction mechanism itself by direct connection is improved. Has the effect of increasing

[Brief description of the drawings]

FIG. 1 is a front perspective view of a main part of an example of a reduction gear transmission according to the present invention.

FIG. 2 is a side view of the main plate of the example of FIG.

FIG. 3 is a front perspective view of a main part of a second example of the reduction gear transmission according to the present invention.

FIG. 4 is a perspective view of an auxiliary member of the example shown in FIG.

FIG. 5 is a perspective view of an example of a conventional reduction gear transmission.

FIG. 6 is a front perspective view of another example of the conventional reduction gear transmission.

FIG. 7 is a side view of the example of FIG. 6;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 motor 2 reduction gear 2-1 housing 2-2 main plate 2-21 main plate surface for fitting and holding bearing 2-22 bent-up surface 2-23 burring portion 2-24 screw hole 3 mounting plate 4 mounting screw 5 auxiliary Member 5-1 Screw hole 5-2 Fitting groove

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16H 1/00-1/28 F16H 57/00-57/12 H02K 7/116

Claims (4)

(57) [Claims] A housing, a bearing member, a gear train rotatably supported by the bearing member, an output shaft connected to the gear train, and the bearing member. in the reduction gear transmission comprising a speed reduction mechanism composed of the main plate which, on the periphery of the base plate, a bent surface which is raised bent from the base plate surface for fitting holding the bearing member該地plate is formed, along with the bending caused surface, said housing The coupling member penetrating the side wall of the body forms a mounting means, wherein 2. A mounting means corresponding to a mounting surface which is perpendicular to the surface of the ground plate on which the bearing member is fitted and held and which is parallel to the axis of the output shaft. The reduction gear transmission according to claim 1, wherein 3. The mounting means according to claim 1, wherein said mounting means includes a screw hole formed in a bent and raised surface of the main plate, and a screw member screwed into said screw hole .
3. The reduction gear transmission according to 1. Wherein said attachment means comprises an auxiliary member is fitted on the bent-up face of the base plate, having a threaded hole formed in the auxiliary member, the screw member to be screwed into the threaded hole, The reduction gear transmission according to claim 1, wherein: