JPH0351542Y2 - - Google Patents

Description

[Detailed explanation of the invention] The present invention is based on a facing slope gear mechanism (patent publication number 54-
120347) (hereinafter abbreviated as sinkle gears), two sets of face gears N ₁ , N ₂ and N ₃ mesh with each other.
The meshing conditions between _N4 can be automatically adjusted using an elastic body.

Compared to a normal side gear mechanism, a sinkle gear has the feature that its meshing conditions can be changed freely by adjusting the gear spacing, so it is generally adjusted with a spacer during assembly.

An embodiment of this mechanism is described in its specification and drawings (Fig. 54).
−120347), the face gear N ₁
The spacing between the gears and _N4 is constant, and during this time, a surface oscillation is applied via a rolling bearing to a high-speed shaft-equipped oblique shaft 1 having a syncline angle Σ° with a oscillation center O at a fixed point on the axis X-X. Gears N ₂ and N ₃ are attached. In this case, the maximum meshing part of the two sets of face gears that occurs with respect to the axis X-X
The back gaps of N ₁ −N ₂ and N ₃ −N ₄ are determined by the machining accuracy, so they are difficult to machine and tend to cause noise and vibration. Furthermore, it is impossible to prevent the back gap from increasing due to tooth profile wear.

The advantage of the sinkle gear is that even if the meshing part is preloaded, there is little effect on the transmission characteristics, and it is possible to stop without a back gap.

In the present invention, a bearing and surface gears N ₂ and N ₃ are mounted at fixed positions with respect to the swing center O of the oblique shaft 1, and either one of the opposing surface gears N ₁ or N ₄ is attached to an elastic body 9.
By applying pressure _with
This invention relates to a mesh adjustment device for a sinkle gear in which each meshing portion is preloaded without changing the relative position between N ₂ , N ₃ -N ₄ and the center of swing O.

An example will be explained with reference to the drawings.

FIG. 1 shows a sinkle gear reducer of a type in which a driven surface gear N ₄ 4 fitted to a low-speed shaft 5 with a coupling is pressurized by an elastic body 9. 2 is a drive (fixed) face gear _N1 with a mounting flange in the same reduction gear.
Mechanically, the sinkle gear must have an offset conical curved surface tooth profile because the pitch cone apex _O1 of at least one set of surface helical gears _N2 is outside the axis X--X line. In order for this tooth profile to mesh normally, the center of oscillation O
The relative position of the maximum engagement part must be kept constant during gear cutting, tooth surface finishing, and during operation. In this embodiment, two bearings and surface gears N ₂ and N ₃ are fixedly mounted at fixed positions with respect to the swing center O of the oblique shaft 1, and both ends of the oblique shaft 1 It is supported by bearings so that it can slide in any direction. The driven face gear N ₄ 4 is connected by a coupling with a low-speed shaft 5 fixed in the axial direction by a bearing, and parallel to the axis X-X by a flange 6 fitted with the low-speed shaft 5, a plurality of pins 8, and a coil spring 9. It is assembled so that it can be moved. 7 is a housing.

During driving, the rotational force of the oblique shaft 1 becomes a rotational motion of the surface gears N ₂ and N ₃ , and the tooth difference component of the two sets of surface gears becomes a rotational force that rotates the driven surface gear N ₄ . At this time, each meshing tooth generates a rotational force in its tangential direction as well as a component force of the tan value of the meshing tooth angle as rotational biased thrust. In this embodiment, these thrust forces are canceled by the diagonal bearings of the plane gears N ₂ and N ₃ , but the thrust forces of the plane gear N ₄ are canceled by the coil spring 9 and the flange 8.
It can be seen that the load is applied to the low-speed bearing through the .

A certain point on the tooth of the deviated sinkle gear face gear is a rolling rotation point, so the gear engages slidingly in the direction of the tooth and tooth trace around this point, resulting in a large tooth contact surface and smooth operation. be able to.
Furthermore, since there is a rolling engagement point, tooth wear does not progress beyond a certain level. Further, even if the finish of the tooth is incomplete and the ends of the tooth interfere, the elastic deformation of the coil spring 9 maintains a balance between the back clearance values of both meshing parts and allows smooth driving. When the driving force disappears, the coil spring 9 adjusts the maximum meshing area N ₁ − of each plane gear.
N ₂ , N ₃ −N ₄ become a preload mesh with no back gap and stop.

During driving and stopping, the teeth of each face gear are crimped with an elastic material, so there is no risk of damage to the teeth or mechanism due to impact, and it is useful for turning and dividing the output shaft when it is necessary to stop it in a fixed position. This mechanism is suitable for machines, etc.

In addition, in this mechanism, an appropriate gap is provided between both shafts of the oblique shaft 1 and their bearings, and by mounting it so that it can move in the axial direction, the straight line connecting the centers of the maximum meshing parts of the two sets of face gears and the oscillation can be achieved. A balanced preload can be applied to both meshing parts while keeping the distance from the center O constant. In a normal sinkle gear reducer, the surface pressure of this meshing part causes the oblique shaft 1 to
By moving the gear in the axial direction, there is almost no difference in the back clearance between the meshing teeth, but for special applications, an elastic body 10 is interposed between both ends of the oblique shaft and the bearing to eliminate the difference in the back clearance between the meshing teeth that occurs during operation. It is also possible to adopt a method of making the gap uniform.

By adding this device to a sinkle gear, the tooth surfaces can be easily finished, and a backless meshing mechanism can be easily obtained without deteriorating its performance. Furthermore, back gap adjustment due to tooth profile wear is automatically compensated for by deformation of the elastic body, so the accuracy can be maintained for a long time without repair.

[Brief explanation of drawings]

FIG. 1 is a central vertical cross-sectional view at the maximum engagement position of an embodiment in which the present device is added to a sinkle gear reducer. 1... Oblique shaft with high-speed shaft, 2... Drive (fixed) face gear with flange N ₁ , 3... Face gear N ₂ , N ₃ , 4
...Driven (rotating) face gear N ₄ , 5 ... Low speed shaft, 6
...Flange, 7...Housing, 8...Pin,
9... Elastic body (coil spring), 10... Elastic body (disc spring), O... Center of oscillation, Σ°... Synclinal angle.

Claims (1)

[Claims for Utility Model Registration] (1) Bearings and surface gears N ₂ and N ₃ are installed at fixed positions with respect to the center of swing O of the oblique shaft 1, and are opposed to each other by the rotation of the oblique shaft 1. In a mesh adjustment device for a facing slope gear mechanism in which a pair of face gears N ₁ and N ₂ are rotated, a low speed shaft 5 having a center hole portion holding an end of the oblique shaft 1 via a bearing is provided. A rotating gear N ₄ that is in mesh with the surface gear N ₃
is provided to be slidable via a coupling ring, the rotating gear _N4 is elastically biased, the oblique shaft 1 is provided to be movable, and the face gear N4 is provided to be movable.
By elastically pressing _N4 toward the surface gear in parallel to the axis X-X, two sets of maximum meshing portions are created in opposite directions with respect to the central axis X-X.
A meshing adjustment device for a facing helical gear mechanism, characterized in that each meshing portion is preloaded without changing the relative positions of N ₁ -N ₂ , N ₃ -N ₄ and the center of oscillation O. (2) Flange 6 fitted to low-speed shaft 5 and face gear N ₄
A plurality of pins 8 and an elastic body 9 are provided to form a face gear.
N ₄ The mesh adjustment device for a face-to-face helical gear mechanism according to claim 1, which applies pressure to the face-to-face gear in parallel with the axis XX. (3) Utility model registration claim 1 or 2, in which a gap is provided between both ends of the oblique shaft 1 and its bearing to enable the oblique shaft to move in the axial direction, and an elastic body 10 is provided in this gap. 2. A mesh adjustment device for a facing helical gear mechanism according to item 2.