JPH1089437A - Plurality of lead double-speed screws for always evenly changing dimesion of plurality of clearances adjacent to each other - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of part items so as to miniaturize a device, and to facilitate the assembling, transportation, adjustment and maintenance by using plurality of lead double-speed screws, which is formed by arranging plurality of different lead screws and each nut in series, and arranging plurality of moving and fixed stages, to which each nut is fixed, in series in a guide shaft fitted in parallel with a screw shaft. SOLUTION: A plurality of lead double-speed screws 1 is formed of three kinds of different leads, and the leads are formed by arranging one time, two time, and three time screws and each nut 2 in order, and each nut 2 is moved by one rotation of the screw shaft at one time, two time and three time magnification of lead. One side of the plurality of lead double-speed screws 1 is fitted to a fixed bearing 5 for preventing axial displacement, and the other side thereof is fitted to a support bearing 6. Three moving stages 4, to which each nut is fixed, are provided in a guide shaft 7 fitted in parallel with the screw shaft so as to be moved simultaneously with the rotation of the screw shaft. In a screw side of one time lead of the plurality of lead double-speed screws 1, dimension of adjacent clearances formed by one fixed stage and three moving stages 4 to move the guide shaft is evenly changed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION In the present invention, a screw and nuts each having a ratio of 1: 2: to N times with a plurality of different leads are serially arranged in order. Each nut is a multiple lead double speed screw that moves at a lead magnification of 1: 2: to N times with one rotation of the screw shaft.

[0002]

2. Description of the Related Art A conventional method of always changing a plurality of adjacent spacing dimensions equally is a multi-groove cam method in which a plurality of groove cams and a cam follower are used to move simultaneously. In addition, a manual measurement method in which a plurality of moving stages are manually moved in order and individually measured to measure an interval dimension. In addition, there were multiple individual feed screw systems that move multiple moving stages in order with multiple individual feed screws, measure the spacing dimension, and adjust them individually.

[0003]

Conventionally, a method of always changing a plurality of adjacent spacing dimensions equally is divided into a multi-groove cam method for simultaneous adjustment, a manual measurement method for individual adjustment, and a plurality of individual feed screw methods. was. At the same time, the groove cam method, which adjusts at the same time, has a limited range of spacing dimensions, making it particularly difficult to make short dimensions, and the parts have also become larger. In addition, in the manual measurement method that adjusts individually and the multiple individual feed screw methods, in order to perform the manual measurement of the interval size of the moving stage,
It required a great deal of time, skill, work space and ease of measurement.

The present invention is directed to a method of always changing a plurality of adjacent spacing dimensions equally by using a plurality of different leads at a ratio of 1: 2:
A multi-lead double-speed screw in which ネ ジ N times the screw and each nut are serially arranged in order. Each rotation of the screw shaft makes each nut 1x: 2
Double: Moves at a read magnification of ~ N times. In the multiple moving stages and the fixed stage to which each nut is fixed, the adjacent spacing dimension always changes equally. In addition, fixing the positions of multiple moving stages is completed at the same time as fixing the screw shaft, so that the spacing dimension can be changed easily in a short time.

[0005]

In order to achieve the above object, the present invention provides a multiple lead double speed screw in which a plurality of screws of different leads and respective nuts are connected in series.

The above-mentioned multiple lead double speed screw in which a plurality of different leads, a screw and a nut are connected in series, has a lead one time in order.
Double: Up to N times the screw and each nut are connected in series. Each rotation of the screw shaft moves each nut at 1x: 2x: ~ N times the lead magnification.

[0007] The above-mentioned multiple lead double speed screw is one of the screw shafts.
By rotation, each nut moves at the same time with 1x: 2x: ~ Nx lead magnification. In the multiple moving stages and the fixed stage to which each nut is fixed, the adjacent spacing dimension always changes equally.

By attaching a graduated handle to a multiple-lead double-speed screw, more precise adjustments can be made. Furthermore, remote control can be performed by connecting a multiple lead double speed screw and an electric motor with position control.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings. The multi-lead double-speed screw (1) has different leads with 1x: 2x: ~ N times screws and nuts in series. Each rotation of the screw shaft moves each nut at 1x: 2x: ~ N times the lead magnification.

The multiple lead double speed screw (1) is mounted on one side to a fixed bearing (5) in which axial displacement is prevented, and the other is mounted to a support bearing (6). There are N moving stages (4) with each nut fixed to a guide shaft (7) mounted parallel to the screw shaft.

By rotating the multiple lead double speed screw (1), the N moving stages (4) simultaneously move the guide shaft (5) at the lead magnification. Fixing the position of N moving stages is completed at the same time as fixing the screw shaft.

By attaching a graduated handle (8) to the multiple lead double speed screw (1), it is possible to adjust the dimensions to an accurate value. Furthermore, remote control can be performed by connecting the multiple lead double speed screw (1) and the electric motor with position control (9).

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A multiple lead double speed screw (1) is made into three kinds of different leads. The lead has 1x: 2x: 3x screws and nuts (2) in order, and each rotation of the screw shaft moves each nut at 1x: 2x: 3x lead magnification.

The multiple lead double speed screw (1) is mounted on one side to a fixed bearing (5) for preventing axial displacement and the other to a support bearing (6). There are three moving stages (4) with each nut fixed on the guide shaft (7) mounted parallel to the screw shaft. When the screw shaft is rotated, the three moving stages (4) move simultaneously.

A single fixed stage (3) and three moving stages (4) for moving a guide shaft are provided on the screw side of the single lead of the multiple lead double speed screw (1), and these stages are adjacent to each other. Spacing dimensions always change equally. The position of the moving stage can be fixed at the same time by fixing the screw shaft.

If a handle (8) with a circumferential scale is attached to the above-mentioned multiple lead double-speed screw (1), the dimensions can be adjusted accurately. Furthermore, remote control can be performed by connecting the multiple lead double speed screw (1) and the electric motor with position control (9).

FIG. 4 shows an arrangement in which a fixed stage (3) and three moving stages (4) are arranged in a vertical line on a multiple lead double speed screw (1), and the starting positions are the same for all stages. Change all stage spacing dimensions equally. Remote operation is possible by connecting the screw shaft and the electric motor with position control (9).

[0018]

Since the present invention is configured as described above, it has the following effects.

A multiple lead double speed screw is formed by serially connecting a plurality of different lead screws and each nut. A plurality of moving stages in which each nut is fixed to a guide shaft mounted parallel to the screw shaft and a stage of the fixed stage are arranged in series, so that the number of parts is reduced and the size can be reduced. Assembly, transportation, adjustment, and maintenance are easier, and prices and costs are lower.

The multiple lead double speed screw can simultaneously change and fix the distance between adjacent moving stages by rotating and fixing the screw shaft, so that it is simple and the adjustment time is short.

If a handle with a circular scale is attached to the multiple lead double speed screw, the dimensions can be adjusted accurately. Furthermore, remote control can be performed by connecting a multiple lead double speed screw and an electric motor with position control.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a state in which all stages are reduced and enlarged by a plurality of lead double-speed screws.

FIG. 2 is a plan view with a handle with a circumferential scale.

FIG. 3 is a plan view in which an electric motor with position control is mounted.

FIG. 4 is a plan view of a multiple lead double speed screw in which all stages are arranged in a vertical line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Multiple lead double speed screw 2 Each nut 3 Fixed stage 4 Moving stage 5 Fixed bearing 6 Support bearing 7 Guide shaft 8 Handle with circumferential scale 9 Electric motor with position control

Claims (1)

[Claims] The multiple lead double-speed screw (1) is composed of a plurality of different leads, in which 1: 1: 2: ~ N times screws and each nut (2) are serially arranged in order. Each rotation of the screw shaft moves each nut at 1x: 2x: ~ N times the lead magnification. N moving stages (4) to which each nut is fixed are on the guide shaft (7) mounted parallel to the screw shaft (1).
There is one fixed stage (3) that does not move on the screw side of the lead. When the screw shaft is rotated, the distance between the N moving stages (4) that have moved simultaneously and the fixed stage adjacent to each other always changes equally. The fixing of the positions of the N moving stages is completed at the same time by fixing the screw shaft, so that it is possible to easily change the interval dimension in a short time. By connecting multiple lead double speed screw (1) and electric motor with position control (9), the distance dimension can be easily changed by remote control.