JPS6143290Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a shaft rotation adjustment mechanism for transmitting the shaft rotational motion of one shaft to the other shaft and adjusting the shaft rotation angle of the latter shaft in two shafts whose relative positions are perpendicular to each other; More specifically, the present invention relates to a shaft rotation adjustment mechanism that can be suitably used in an antenna support device that supports an antenna used for communication.

An antenna support device must maintain its function in the natural environment for a long period of time after adjusting its direction to match the radio wave emission axis of the opposing antenna. Therefore, it is desirable to improve accuracy, strength, and corrosion resistance. FIG. 2 is a perspective view showing the configuration of a conventional adjustment mechanism used in the support device.

As a conventional adjustment mechanism, as shown in FIG.
It is considered that the shaft rotational motion of the shaft is transmitted to the driven shaft 12 to adjust the shaft rotation angle. This mechanism that combines a worm gear and a worm is an effective means when the distance between the two axes is short, but when used for a large object such as an antenna device, the distance between the axes becomes long.
In addition, the size of the teeth must be increased in order to withstand external forces such as wind loads. However, the mechanism that combines a worm gear and worm has a long distance between the axes, and as the tooth size increases, the bumpiness of the gear meshing area increases, so precision machining and accurate positioning of the distance between the two axes are required. Therefore, it had the disadvantage of being expensive and heavy.

An object of the present invention is to provide a shaft rotation adjustment mechanism that eliminates the above-mentioned drawbacks, is inexpensive, lightweight, and has sufficient strength.

In order to achieve the above object, the shaft rotation adjustment mechanism according to the present invention is a two-shaft rotation transmission mechanism that is arranged at right angles to each other with a certain interval, and one shaft is provided with a threaded portion and a sliding nut is engaged with the shaft rotation transmission mechanism. , an arm having a hole at the tip and capable of using a hollow member is fixed to the other shaft within a range permitted by strength, and the sliding nut is fixed so that the one shaft can slide into the hole. is engaged with the arm, and as the one shaft rotates, the sliding nut pushes the arm and transmits the rotation to the other shaft.

According to the above configuration, all of the above-mentioned problems are solved and the purpose of the present invention can be completely achieved.

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

FIG. 1 is a partially cutaway perspective view of an embodiment of the adjustment mechanism according to the present invention. In the figure, reference numeral 1 is a driving shaft, and a male thread is provided in the middle of the shaft. 2 is the driven shaft,
An object whose rotation is adjusted is attached to this shaft.
Both ends of the shafts 1 and 2 are supported by bearings that restrict their movement in the axial direction and allow them to freely rotate around the shafts, and as these bearings are of a known type, explanations and illustrations are omitted. . 3 is an arm made of a tetrahedral hollow member to increase its light weight and rigidity, and one end is fixed to the driven shaft 2 at right angles by welding or a suitable coupling means such as a key, and the other end is connected to the driving shaft 1. two faces 3a, 3 facing each other so that the
A long hole 3c is provided in b. Reference numeral 4 denotes a relatively thick parallel plate, which is positioned inside the hollow member where the elongated hole 3c of the arm 3 is open so as to be parallel to the elongated hole surface 3a, and is fixed to the arm 3 with upper and lower bolts 6. ing. The parallel plate 4 has a long hole 4a of the same size as the long hole 3c of the arm 3.

Numeral 5 is a cylindrical sliding nut with a female thread on the side that matches the male thread of drive shaft 1 in the radial direction, and is capable of sliding and rotating between two parallel surfaces made up of arm 3 and parallel plate 4. It is meshed with the driving shaft 1 as shown in FIG.

The operating principle of this structure is that when the driving shaft 1 rotates, the rotational movement of the driving shaft 1 is converted into linear movement of the sliding nut 5 by the pair of screws formed by the combination of the male thread of the driving shaft 1 and the female thread of the sliding nut 5. be done. The sliding nut 5, which performs this linear motion, is pushed by the sliding nut 5 while sliding on the outer diameter surface of the sliding nut 5. It performs rotational movement around the driven shaft 2. That is, the driven shaft 2 connected to the arm 3 performs a rotational movement.

As described in detail above, since the adjustment mechanism according to the present invention transmits motion between the two axes through the screw pair and the sliding pair, machining of the component parts is simple and inexpensive.

In addition, the distance between the two axes can be easily changed by changing the length of the arms, and errors caused by assembly are absorbed by the sliding pair mechanism.Furthermore, hollow materials can be used for the arm members, reducing weight. Various effects can be obtained, such as being able to measure

[Brief explanation of the drawing]

FIG. 1 is a partially sectional perspective view showing an embodiment of the shaft rotation adjustment mechanism according to the present invention, and FIG. 2 is a perspective view of a conventional mechanism. 1... Driving axis, 2... Driven axis, 3... Arm, 4...
... Parallel plate, 5 ... Sliding nut, 11 ... Driving shaft with a worm formed in the middle part of the shaft, 12 ... Driven shaft, 13 ... Worm gear.

Claims (1)

[Scope of utility model registration request] In a rotation transmission mechanism with two shafts arranged at right angles to each other with a certain interval, one shaft has a threaded part to engage a sliding nut, and the other shaft has a hole at the tip and a strong To the extent permitted by
A hollow member is fixed to the usable arm, the sliding nut is engaged to the arm such that the one shaft is slidable into the hole, and rotation of the one shaft causes the sliding nut to engage the arm. A shaft rotation adjustment mechanism configured to push the arm and transmit rotation to other shafts.