JPS6318853Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a reduction in the manufacturing cost of a transmission device such as a gear reduction gear, particularly a support shaft that rotatably supports a driven rotating body.

[Prior art]

Figures 1 and 2 show an example of a conventional transmission. Figure 1 is a partial sectional view, and Figure 2 is a
The bearing shaft shown in the figure is shown in Fig. A is a front view showing the shape before and after processing, and Fig. B is a side view of Fig. A. In the figure, 1 is an electric motor, 2 is a rotor shaft of this electric motor 1, 3 is a drive rotating body (hereinafter referred to as the first gear) consisting of a first gear fitted to one end of this rotor shaft 2, 4 is a second gear that meshes with this first gear 3 and reduces the rotational speed of this first gear 3; 5 is this second gear;
A third gear coupled to gear 4 via key 6,
A driven rotating body 7 is configured in cooperation with the second gear 4. 8 is a support member formed of a gear box screwed to one end of the electric motor 1, 8a is a through hole formed on one end of the support member 8, and 8b is a hole formed on the other end of the support member 8. It is a bottom hole and is arranged on the same axis as the through hole 8a. Reference numeral 8c denotes a female penetrating screw carved into the outer edge of the through hole 8a, and reference numeral 9 denotes a support shaft formed by machining the shaded area shown in Fig. 2A, which connects the cylindrical portion 9a, the flange 9b, and the flange. A through hole 9c is formed in the portion 9b, and the cylindrical portion 9a is fitted into the through hole 8a and the bottomed hole 8b, and one end surface of the flange portion 9b is in contact with the outer end surface of the one end side of the support member 8. The driven rotating body 7 is supported in a rotatable manner through a pair of ball bearings 10 and 11. 12 is the through hole 9
The flange portion 9b is screwed to the support member 8 by a small screw that passes through the through hole 8c and is screwed onto the female through-thread 8c, thereby preventing rotation of the support shaft 9. A fourth gear 13 meshes with the third gear 5, and is coupled to, for example, an output shaft (not shown).

The operation of the structure constructed in this way is well known and will not be explained here, but since the support shaft 9 is formed by machining a large diameter material as described above, the material cost and cost of the support shaft 9 are high. The disadvantage was that the processing costs were high and the manufacturing cost of the transmission was high.

[Summary of the idea]

This idea was made in an attempt to eliminate these drawbacks.The support shaft is formed into a cylindrical shape with the same diameter, and an eccentric hole is provided at one end to be fitted into the through hole of the support member. By coupling the engagement member and coupling the other end side of the rotation prevention member formed at one end side with the engagement part that engages the engagement member to the outer end side end surface of the through hole, the support shaft can be fixed. The present invention proposes a transmission that significantly reduces manufacturing costs.

[Example of idea]

Figures 3 to 5 show an embodiment of this invention. Figure 3 is a sectional view of the main part, Figure 4 shows the support part in Figure 3, and Figure A is a front view and a bottom view. The figure is a side view of Fig. A, and Fig. 5 shows the rotation prevention member of Fig. 3. Fig. A is a front view, and Fig. B is a side view of Fig. A. In the figure, reference numeral 9 denotes a support shaft formed in a cylindrical shape with the same diameter, and an eccentric hole 9d made of a female screw carved eccentrically from the axis is provided at one end that is fitted into the through hole 8a of the support member 8. ing. 14 is an engagement member made of a hexagonal socket bolt screwed into the eccentric hole 9d; 15 is a rotation prevention member in the shape of a circular flat plate;
An engaging portion 15a consisting of a through hole facing the outer peripheral surface of the one end side of the engaging member 14 with a small gap is formed on one end side, and a machine screw 1 screwed into the female thread 8c on the other end side.
A through hole 15b through which the support member 2 passes is provided, and the support member 8 is connected to one end surface of the support member 8 by a machine screw 12. Other configurations and operations are the same as those of the conventional device, so explanations will be omitted, but the rotation prevention member 1
The effect of No. 5 will be briefly explained. When the support shaft 9 attempts to rotate together with the driven rotating body 7, the engagement member 14 is coupled to the eccentric hole 9d of the support shaft 9, and the engagement portion 15a of the rotation prevention member 15 engages with the engagement member 14. Therefore, rotation of the support shaft 9 is prevented.

In this embodiment, the driving rotating body 3 is replaced by the electric motor 1.
A first gear fitted to one end of the rotor shaft 2, a second gear 4 that meshes the driven rotor 7 with the first gear, and a third gear coupled to the second gear 4 via a key 6. 5, but it is needless to say that the invention is not limited to this embodiment. Furthermore, although the transmission has been described as a speed reduction device, it may also be a speed increase device.

[Effect of idea]

As explained above, in this invention, the support shaft is formed into a cylindrical shape with the same diameter, an eccentric hole is provided at one end that is fitted into the through hole of the support member, and the engagement member is coupled to the eccentric hole. Since the other end side of the rotation prevention member of the support shaft formed on one end side of the engagement part that engages with the engagement member is coupled to the outer end side end surface of the through hole of the support member, the support shaft This has the effect of significantly reducing material and processing costs. In addition, the engaging member is only engaged in the rotating direction with the engaging portion of the rotation prevention member, and when the supporting shaft is removed from the supporting member, the engaging member remains attached to the supporting shaft. This makes it possible to pull out the support shaft in the axial direction, which has the effect of making disassembly work extremely easy.

[Brief explanation of drawings]

Figures 1 and 2 show an example of a conventional transmission. Figure 1 is a partial sectional view, and Figure 2 is a
Figure A is a front view showing the shape before and after processing, Figure B is a side view of Figure A, and Figures 3 to 5 show one embodiment of this invention. Figure 3 is a sectional view of the main part, Figure A in Figure 4 is a front view of the bearing shaft,
Fig. 5 is a side view of Fig. 5, Fig. 5 is a front view of the rotation prevention member, and Fig. 5 is a side view of Fig. A. In the figure, 3 is a driving rotor, 7 is a driven rotor, 8 is a support member, 8a is a through hole, 9 is a support shaft,
9d is an eccentric hole, 14 is an engaging member, 15 is a rotation prevention member, and 15a is an engaging portion. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] (1) A driving rotating body, a driven rotating body connected to the driving rotating body and changing the rotational speed of the driving rotating body, and a driven rotating body rotatably supporting the driven rotating body and at both ends thereof. In a transmission equipped with a support shaft that is fitted into a support member, the support shaft is formed in a cylindrical shape with the same diameter and has an eccentric hole at one end that is fitted into the through hole of the support member; an engaging member that is coupled to the eccentric hole; and an engaging portion that engages with one end of the engaging member; A transmission device comprising a rotation prevention member for a support shaft. (2) The transmission according to claim 1, wherein the engaging member is a bolt with a hexagonal socket. (3) The transmission according to claim 1, wherein the engaging portion is a through hole through which the head of the hexagonal socket bolt passes through a small gap.