JPS622357Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is based on the invention in which the distance between one axis and the other axis is relatively far, and the directions of these axes are arranged almost orthogonally. The present invention relates to an improvement in a rotation transmission mechanism that transmits rotation in a relatively small range to a shaft.

In various types of equipment, it is often necessary to rotate the driven shaft within a relatively small range for purposes such as unlocking. Additionally, in this case, due to the constraints of the related mechanisms, the main drive shaft that drives the driven shaft may be relatively far away from the driven shaft, and its axial direction may be perpendicular to the driven shaft. Not a few.

This idea is as follows: one axis (main drive axis)
and the other axis (driven axis) are relatively far apart,
The present invention also relates to a mechanism for transmitting rotation within a relatively small range from one of two axes arranged at positions where their axial directions are substantially orthogonal to the other, which operates reliably, is easy to adjust, and is low-cost. The purpose is to provide a mechanism that can be used to create.

Traditionally, in order to accomplish this kind of daily task, levers,
Mechanisms that use a combination of many parts, such as links and cams, are common, but they require a large number of parts, are expensive, and have problems such as stroke loss caused by accumulated backlash. In addition, in a mechanism using a connecting rod, the connecting part between the connecting rod and the driving shaft and driven shaft may be die-cast, resin molded, or a sheet metal lever crimped onto the boss of a cut workpiece. However, the parts are expensive.

The drawing shows an embodiment of the rotation transmission mechanism of this invention, and in the drawing, for example, one shaft 1, which is a driving shaft, is vertically arranged, and the other shaft 2, which is a driven shaft, is arranged vertically. The two shafts are relatively far apart from the other shaft 1, and are arranged so that the axial direction thereof is substantially orthogonal to the axial direction of the other shaft 1. 3 is a bracket fixed to one shaft 1 with a nut 4 or the like, and has a flat plate portion 3a whose portion extending substantially perpendicular to the shaft 1 is further bent in the axial direction of the shaft 1; 5 is the other shaft 2; A bracket 7 has a flat plate part 5a fixed to the bracket by a screw 6 or the like and substantially opposed to the flat plate part 3a of the bracket 3, and 7 is bored in the flat plate parts 3a and 5a of the first and second brackets 3 and 5. The first and second through holes 3
b, 5b at both ends thereof, and the end thereof penetrated through hole 5b has a stopper 10 so that it is slightly loosely fitted and cannot be pulled out in the pulling direction, and A screw 7a is provided at the end penetrated by the hole 3a, and an adjuster nut 8 serving as a stopper is screwed into the screw 7a. Further, a spring 9 is hung on the flat plate portion 5a of the bracket 5 to pull it in the opposite direction to the bracket 3.

The rotation transmission mechanism of this invention includes one shaft, another shaft spaced apart from the one shaft by a predetermined distance, and arranged so that the axial directions thereof are substantially perpendicular to each other.
a first bracket fixed to the one shaft and having a flat plate part parallel to the other axis and a first through hole provided in the flat plate part; a second hole extending a predetermined distance from the axis in a direction perpendicular to the axis and substantially facing the first through hole;
a second bracket having through-holes, a connecting rod that is loosely fitted through these through-holes and connected at both ends thereof, and at least one side provided at both ends of the connecting rod is screwed to the connecting rod. A stopper made of an adjusted nut, and a spring provided on the bracket, which always applies a tensile force to the connecting rod in the opposite direction to the driving traction direction, prevents one shaft 1 from rotating in the direction of arrow A. When moved,
The rotation pulls the connecting rod 7 in the direction of the arrow B through the bracket 3, and is further transmitted to the other shaft 2 through the bracket 5 connected to the connecting rod 7, pulling it in the direction of the arrow B. It can be rotated. As is clear from the figure, the rotation direction of one shaft 1 is changed by approximately 90 degrees and is transmitted to the other shaft 2. Also, the relative rotation angle between one shaft 1 and the other shaft 2 is determined by adjusting the adjustment nut 8.
It can be adjusted by turning. Furthermore, the spring 9 always applies a tensile force to the connecting rod 7 in the opposite direction to the driving and pulling direction, thereby preventing stroke loss due to looseness, thereby making the rotation movement more accurate.

Further, as shown in FIG. 1, the distance between the axis of one shaft 1 and the center of the through hole 3b bored in the flat plate part of the bracket 3 is a, and the distance between the axis of the other shaft 2 and the bracket If the distance from the center of the through hole 5b drilled in the flat plate part 5a of 5 is b, the rotation ratio between one shaft 1 and the other shaft 2 is b/a, so the distances a and b are By adjusting and setting appropriately,
A desired rotation ratio can be obtained.

The rotation transmission mechanism devised as described above has a small number of parts and does not require expensive parts such as parts made by die casting, resin molding, cutting, etc. Cost is low.

In addition, as a mechanical element with a degree of freedom interposed between the two shafts, only one connecting rod is required, and since the spring always applies a tensile force to the connecting rod in the opposite direction to the driving traction direction, the accumulation of backlash can cause It has features such as no cross, allowing for high rotational position accuracy.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the rotation transmission mechanism of this invention, Fig. 2 is a detailed view of the fixed state of the bracket fixed to the other shaft, and Fig. 3 is a detailed view of the screwed state of the adjustment nut to the connecting rod. It is. 1...One axis, 2...The other axis, 3...First
Bracket, 3a... Flat plate part, 3b... First through hole, 4... Nut, 5... Second bracket,
5a... Flat plate part, 5b... Second through hole, 7... Connecting rod, 7a... Screw, 8... Adjustment nut,
9...Spring, 10...Stopper.

Claims (1)

[Scope of utility model registration request] one shaft, another shaft spaced a predetermined distance from the one shaft and arranged so that the axial directions are substantially orthogonal to each other, and fixed to the one shaft;
a first bracket having a flat plate portion parallel to the other axis and a first through hole provided in the flat plate portion; a second bracket having a second through hole that is substantially opposite to the first through hole at a position where the second through hole is located; a connecting rod that is loosely fitted through these through holes and whose both ends are connected; stoppers provided at both ends of the connecting rod, at least one of which is made of an adjuster nut screwed onto the connecting rod; and a spring provided in the bracket, which always applies a tensile force to the connecting rod in the opposite direction to the driving traction direction. A rotation transmission mechanism consisting of: