JP5147635B2 - Gear transmission device - Google Patents

Description

  The present invention relates to a gear transmission device suitable for transmitting power as intersecting staggered shafts in which the respective gear shaft centers are not on the same axis.

  In general, according to the purpose of use for gear transmission, for example, in FIG. 12 (a) (b) (c), a gear used for transmitting power as a parallel shaft as shown in FIG. In addition to the gear used when transmitting power as a 90-degree cross axis, there is a gear used when transmitting power as a staggered shaft as shown in FIG. A screw gear is known as a representative example of a gear used as a staggered shaft.

  The screw gear is made by using a hobbing machine and a hob cutter, and the pitch surface of the screw gear has a cylindrical shape. By engaging the screw gear with a predetermined misalignment angle, for example, each gear shaft center line is It is possible to transmit power using a staggered shaft that is not on the same axis.

  Threaded gears used for staggered shafts that are not on the same axis are meshed by point contact, so that the problem of the tooth strength is left, so that point contact is disliked and meshing by line contact is obtained as shown in FIG. A screw gear 101 has been proposed.

The screw gear 101 that can be in line contact has a structure in which the pitch surface is a non-cylindrical surface and meshes in a state of line contact with the mating gear over a substantial portion of the tooth width L during meshing.
JP-A-8-28659

Each gear axial line is used as a gear discrepancy axis intersecting not on the same axis, for example, to engage a different gear same as the screw gear and Wemugiya as shown in FIG. 12 (c) described above Although but a common, if the pitch surface made in the same shape in order to ensure the engagement of the line contact is used as a discrepancy shaft engage the screw gear What happened to be a non-cylindrical surface, meshing of the screw gear same mechanic Depending on conditions, it is difficult to use the angle of the two axes (axis angle) as 90 degrees, and there is a problem that the angle is restricted.

  Therefore, an object of the present invention is to provide a gear transmission device that enables transmission of power with a stagger angle including 90 degrees and transmission of large rotational power using the same gear.

In order to achieve the above object, according to the present invention, teeth are formed along the generatrix of the rotating monoplane hyperboloid that forms the rotating monoplane hyperboloid , and the pitch is formed along the generatrix of the rotating monoplane hyperboloid. Combining multiple drum gears with long teeth widths with varying surfaces, and combining the input gears, intermediate gears, and output gears , where the combined gear shafts intersect at least on the same axis and mesh with each other in line contact. The intermediate gear meshes with the input gear with the intermediate gear shaft center line having a misalignment angle of 45 degrees with respect to the input gear shaft center line of the input gear, and the output gear has its output gear A shaft center line meshes with the intermediate gear with a 45 ° stagger angle with respect to the intermediate gear shaft center line of the intermediate gear, and the output gear has an output gear shaft center line that is the input gear shaft of the input gear. of 90 degrees with respect to the heart line And wherein the Tei Rukoto have had difference angle.

  According to the present invention, for example, each gear shaft center line is not on the same axis line and can be used as a normal staggered shaft gear by meshing three intersecting gears that are an input gear, an intermediate gear, and an output gear. Thus, power can be transmitted with a predetermined angle difference.

  On the other hand, for example, the intermediate gear is meshed with the gear shaft center line of the input gear at an angle of 45 degrees, and the output gear is connected to the gear shaft center line of the intermediate gear. By engaging the core wire at an angle of 45 degrees, power can be transmitted at a position where the output gear is 90 degrees with respect to the input gear while being used as a gear of a staggered shaft.

  When the power is transmitted at 90 degrees, the input gear, the intermediate gear, and the output gear are engaged at an angle of 45 degrees, and the intermediate gear and the output gear are engaged at an angle of 45 degrees. Each meshing does not occur excessively, a smooth meshing state is obtained, and a large rotational power can be transmitted by meshing of line contact with a long tooth width in the axial direction.

  Hereinafter, embodiments of the present invention will be specifically described with reference to FIGS. 1 to 11.

  FIG. 1 is a schematic perspective view showing a main part of a gear transmission device according to the present invention.

  The gear transmission device 1 has a gear structure in which each gear shaft center line 3a, 5a, 7a is used as a staggered shaft that is not on the same axis line by meshing three gears of an input gear 3, an intermediate gear 5, and an output gear 7. ing.

  The input gear 3, the intermediate gear 5, and the output gear 7 are all made of the same shape of a drum shape, and here, the input gear will be specifically described as a representative.

  The input gear 3 is a drum-shaped gear having a long tooth width D as shown in FIG. 5, and the gear body has the shape of a rotating single-leaf hyperboloid 9 as shown in FIG.

  As shown in FIG. 10, the rotating monoplane hyperboloid 9 includes points 1, 2, 3,... And a lower circle 13 provided along upper and lower circles 11 having the same center axis Y and facing each other. Are connected by a line 15 in order, such as points 1, 1, 2, 2, 3, and 3 at positions shifted by a predetermined angle from points 1, 2, 3,. A rotating monoplane hyperboloid 9 having a drum shape is obtained.

The tooth portion 17 has a curved pitch surface along a generatrix (line 15 connecting points 1, 2, and 2) of the rotating single leaf hyperboloid 9 that forms the rotating single leaf hyperboloid 9 as shown in FIG. 5. It made to change the long shape of the tooth width D.

  The tooth portion 17 is formed at an angle twisted to the left by a predetermined angle with respect to the gear axis 3a as shown in FIG. 6, but may be formed at an angle twisted to the right.

  Further, the number of teeth and the size (module) of the teeth may be appropriately designed according to the purpose of use.

  As shown in FIG. 1, the input gear 3, the intermediate gear 5 and the output gear 7 configured as described above are meshed with each other and used as crossed staggered shaft gears where the gear shaft centers 3a, 5a and 7a are not on the same axis. To do.

  At the time of gear transmission by this misalignment shaft, the gear shaft center line 7a of the output gear 7 can perform power transmission based on a predetermined misalignment angle that falls within an acute angle with respect to the gear shaft center line 3a of the input gear 3.

  On the other hand, as shown in FIGS. 2 and 3, for example, the intermediate gear 5 is meshed with the gear shaft center line 3a of the input gear 3 at an angle θ1 of 45 degrees with respect to the gear shaft center line 5a. When the gear shaft center line 7a of the output gear 7 meshes with the gear shaft center line 5a at an angle θ2 of 45 degrees, the meshing center point 0-1 of each of the gears 3, 5, and 7 as shown in FIG. As shown in FIG. 3, each gear shaft center line 3a, 5a, 7a is on the same axis, and is a staggered shaft based on the meshing condition that is a parallel plane. At the same time, the meshing angle does not become unreasonable, and a large amount of power can be transmitted with the shaft angle of the output gear 7 with respect to the input gear 3 at an angle θ3 of 90 degrees by meshing by line contact.

  In this case, the meshing conditions of the input gear 3, the intermediate gear 5, and the output gear 7 used as the staggered shaft are outside the state in which the gear shaft centers 3a, 5a, 7a of the gears 3, 5, 7 are in parallel planes. As shown in FIGS. 8 and 9, there is a state in which the gear shaft center line 3a of the input gear 3 and the gear shaft center line 5a of the intermediate gear 5 are in a parallel plane and the gear shaft center line 7a of the output gear 7 is not in a parallel plane. is there.

  Further, by increasing the meshing angles of the input gear 3, the intermediate gear 5, and the output gear 7, gear transmission by a staggered shaft of 90 degrees or more is possible.

The outline perspective view of the important section showing the gear transmission concerning the present invention. The outline explanatory top view which showed the state which meshed the drum-shaped gearwheel with the conceptual diagram. The outline explanatory front view of FIG. The general | schematic perspective view which showed one of the drum-shaped gearwheels which comprises a gear transmission apparatus. The front view of the outline of a drum-shaped gear. AA line sectional view of Drawing 5. FIG. 6 is a schematic side view of FIG. 5. The outline explanatory top view of another embodiment which showed the state which meshed the drum-shaped gear with the conceptual diagram. Outline explanatory front view of FIG. Basic explanatory drawing to create a rotating monoplane hyperboloid. Outline explanatory drawing of a rotation single leaf hyperboloid. (A) An explanatory view of a general gear used as a parallel axis, (b) a crossing axis, and (c) a staggered axis. The conventionally well-known explanatory drawing which showed the screw gear.

Explanation of symbols

3 Input gear 3a, 5a, 7a Gear shaft center line 5 Intermediate gear 7 Output gear 9 Rotating single-leaf hyperboloid 15 Bus (connecting line)

Claims (1)

Combining a plurality of drum-shaped gears with a long tooth width in which teeth are formed along the generatrix of the rotating monolobal hyperboloid forming the rotating monolobal hyperboloid and the pitch surface varies along the generatrix of the rotating monolobal hyperboloid The combined gear shaft center lines intersect at least in a state where they are not on the same axis, and constitute an input gear, an intermediate gear, and an output gear that mesh with each other by line contact ,
The intermediate gear meshes with the input gear with an intermediate gear axis having a misalignment angle of 45 degrees with respect to the input gear axis of the input gear,
The output gear meshes with the intermediate gear with an output gear axis having a misalignment angle of 45 degrees with respect to the intermediate gear axis of the intermediate gear;
Said output gear, gear transmission, characterized in Tei Rukoto have discrepancy angle of 90 degrees with respect to the input gear axial line of the output gear axial line is the input gear.

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