JP2009115183A - Coupling device and connection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and properly connect a rotary shaft having a small diameter to a measuring shaft of a measuring device. <P>SOLUTION: When moving a slide member 121 leftward to a base part 11 against energization of a coil spring 123 (c), a head part 1221 of a chuck member 122 projects by separating from a right side end part of the slide member 121, and three claws 1223 are put in an opening state by elasticity of itself. When releasing the slide member 121 by inserting the rotary shaft 2 of a motor 60 between the three claws 1223 of the chuck member 122 in this state, the slide member 121 closes the three claws 1223 of the chuck member 122 by moving to the right side while allowing an inner peripheral surface to abut in a tapered shape of an outer peripheral surface of the head part 1221 by the energizing action of the coil spring 123. The three claws 1223 of the closed chuck member 122 firmly grip and hold the rotary shaft 2 of the motor 60 with energizing force of the coil spring 123 in a state of arranging the rotary shaft 2 of the motor 60 in the center (d). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a technique for connecting a rotating shaft to be measured such as a motor to a measuring shaft of a measuring device such as a torque meter or a tachometer.

2. Description of the Related Art Conventionally, a measuring device for evaluating the characteristics of a motor that measures the torque and other various characteristics of the motor based on the behavior of a measuring shaft connected to the rotating shaft of the motor is known (for example, Patent Documents 1 and 2).
Further, as a technique for connecting the measurement shaft of such a measurement device and the rotation shaft of the motor, for example, as shown in Patent Document 3, the measurement shaft of the measurement device and the rotation shaft of the motor are hollow from both sides. A hollow cylindrical coupling device inserted into a part has been used. Here, in such a coupling device, the measuring shaft and the rotating shaft inserted into the hollow portion are respectively connected to the core by a screw provided in the coupling device and projecting back and forth in the radial direction and projecting into the hollow portion. Out and fixing are done.
JP 2006-220497 JP JP 2006-284501 A JP 2005-036861 A

  When the rotating shaft of a micro motor whose diameter is less than 1 mm is connected to the measuring shaft by the coupling device disclosed in Patent Document 3, the coupling device is also small and precise according to the diameter. In addition, it is necessary to make a precise work to connect the appropriate measuring shaft and rotating shaft using the coupling device.

  Therefore, an object of the present invention is to make it possible to easily and appropriately connect the rotation shaft to be measured to the measurement shaft of the measuring apparatus even when the diameter of the rotation shaft is small.

  In order to achieve the above object, a coupling device for connecting the measurement shaft of the measurement device of the present invention and the rotation shaft of the measurement object is composed of a base portion and connecting portions respectively provided at both ends of the base portion. A hollow of the slide member having a hollow cylindrical slide member mounted on each connecting portion so as to be slidable in the axial direction with respect to the base portion, and a head formed by a plurality of concentric claws. A chuck that is fixed to the base portion in a form inserted into the portion and a biasing member are provided. Here, the chuck has an expanding force of the plurality of claws due to elasticity, and the slide member is fitted to and detached from the head of the chuck along with the slide with respect to the base portion. The biasing member biases the slide member in a position direction in which the slide member is fitted to the chuck head.

  According to such a coupling device, the diameter of the rotary shaft can be simply operated by simply sliding the slide member to a position where it is separated from the chuck head, inserting the rotary shaft into the chuck, and releasing the slide member. Even when the angle is small, the rotation shaft to be operated can be properly held in the center of the chuck by the plurality of claws arranged concentrically with the chuck by the biasing force of the biasing member.

  In addition, a connecting part is provided only at one end of such a coupling device to constitute a connecting device, and the other end of the base part of the outside connecting device is connected to the measuring shaft so as to be detachable or fixed by any means. You may make it do. Further, the urging member may be a coil spring arranged in a form in which the chuck is passed through the hollow portion of the slide member.

  As described above, according to the present invention, even when the diameter of the rotating shaft is small, the rotating shaft to be measured can be easily and appropriately connected to the measuring shaft of the measuring apparatus.

Hereinafter, an embodiment of the present invention will be described taking application to a torque meter that measures various torque characteristics such as cogging torque of a motor as an example.
FIG. 1 shows an overview of a coupling device according to this embodiment.
FIG. 1A is a diagram illustrating the coupling device 1 in a non-use state, where a1 is a perspective view of the coupling device 1 in a non-use state, a2 is a front view of the coupling device 1 in a non-use state, and a3 is a non-use state. The right view of the coupling apparatus 1 of the use condition is represented.
FIG. 1 b is a diagram showing the coupling device 1 in a use state. In the use state, the coupling device 1 is connected to a rotation shaft 2 of a motor to be measured and a measurement shaft 3 of a measurement device. In FIG. 1, b1 is a perspective view of the coupling device 1 in use, b2 is a front view of the coupling device 1 in use, and b3 is a right side view of the coupling device 1 in use. Yes. The back surface, top surface, and bottom surface of the coupling device 1 appear in the same manner as the front surface, and the left side surface of the coupling device 1 appears in the same manner as the right side surface.

As shown in the figure, the coupling device 1 includes a hollow pipe-shaped base portion 11 and a pair of connecting portions 12 provided at the left and right ends of the base portion 11.
Each of the connecting portions 12 includes a hollow pipe-shaped slide member 121 in which the end of the base portion 11 is loosely fitted in the hollow portion, and a base member 11 as shown in FIG. The chuck member 122 is fixed to the end in a form in which one end is inserted, and the coil spring 123 is disposed between the chuck member 122 and the slide member 121 in the radial direction.

  As shown in FIG. 2B, the chuck member 122 is provided with a head portion 1221 having a diameter larger than that of the other portion on the side opposite to the end inserted into the base portion 11. The outer peripheral surface of the head 1223 is formed in a tapered shape whose diameter decreases toward the base portion 11 side. Further, the chuck member 122 is provided with a through hole 1222 in the center. The chuck member 122 is provided with three notches 1224 at equal angular intervals so that the head 1221 is formed by three equal angularly spaced claws 1223.

  The coil spring 123 described above is sandwiched between the head portion 1221 of the chuck member 122 having one end fitted into the base portion 11 and the end portion of the base portion 11 in the left-right direction, as shown in FIG. It arrange | positions between the chuck | zipper member 122 and the slide member 121 about radial direction.

Next, a stopper portion 1211 that engages with a flange 111 provided at an end portion of the base portion 11 is provided on the inner peripheral surface of the slide member 121 in order to prevent the slide member 121 from falling off the base portion 11. It has been.
Hereinafter, the operation of the connecting portion 12 will be described by taking as an example the operation of connecting the rotating shaft 2 of the motor to the right connecting portion 12.
First, in the non-use state, as shown in FIG. 2 a 1, the slide member 121 is moved to the maximum right side where the stopper portion 1211 comes into contact with the flange 111 provided at the end portion of the base portion 11 by the biasing action of the coil spring 123. It will be in the state moved to the approached position. In this state, as shown in the right side view of FIG. 2 a 2, the three claws 1223 of the chuck member 122 are constricted on the inner peripheral surface of the slide member 121 until the notch 1224 is closed at the right end portion and closed. It becomes a state.

Then, as shown in FIG. 2 c 1, when the slide member 121 is moved to the left with respect to the base portion 11 against the biasing force of the coil spring 123, the head portion 1221 of the chuck portion is moved to the right side of the slide member 121. As shown in the right side view of FIG. 2 c 2, the three claws 1223 are in an open state by separating from the end portion and projecting, and by the expansion force due to its own elasticity.
Therefore, in this state, when the rotating shaft 2 of the motor is inserted between the three claws 1223 of the chuck member 122 and the slide member 121 is released, the slide member 121 is moved to the inner peripheral surface by the biasing action of the coil spring 123. Is moved to the right side while abutting the taper shape of the head portion 1221, the three claws 1223 of the chuck member 122 are closed, and the rotating shaft 2 of the motor is moved to the center of the chuck member 122. Then, as shown in FIG. 3d1, when the three claws 1223 move to a position where the rotary shaft 2 of the motor is sandwiched, the slide member 121 stops moving. And in this state, as shown in the right side view of FIG. Hold the rotating shaft 2 of the motor.

The operation of the connecting portion 12 has been described above by taking the operation of connecting the rotating shaft 2 of the motor to the right connecting portion 12 as an example. The connection of the measuring shaft 3 of the torque meter of the left connecting portion 12 is similarly performed.
Next, FIG. 3 a shows an overall configuration of a torque meter to which such a coupling device 1 is applied.
As shown in the figure, the torque meter includes a measuring apparatus main body 51 having a measuring shaft 3 and a moving stage 52 that fixes and supports a motor 60 to be measured and positions the position at an arbitrary position. The rotating shaft 2 of the fixed motor 60 and the measuring shaft 3 are connected by the coupling device 1, and various rotational characteristics such as torque fluctuations of the motor 60 are measured while the motor 60 is rotated by the measurement main body. is there.

  As described above, according to the coupling device 1 according to the present embodiment, the slide member 121 is slid in the direction opposite to the biasing direction of the coil spring 123, the shaft is inserted into the chuck member 122, and the slide member 121 is released. Even when the diameter of the shaft is small, the shaft can be firmly held in the center by the plurality of claws 1223 arranged concentrically on the chuck member 122 with the biasing force of the coil spring 123 even when the diameter of the shaft is small. become.

  By the way, the coupling part 12 of the coupling device 1 shown in the present embodiment may be provided at the tip of the measurement shaft 3 as shown in FIG. In this way, the measuring shaft 3 is configured as the measuring shaft 3 with a chuck mechanism, and the rotating shaft 2 of the motor 60 can be directly connected to the measuring shaft 3 without using the coupling device 1. It becomes like this.

In the coupling device 1 described above, the sizes of the connecting portions 12 provided on the left and right sides may be different as shown in FIG. 3c, for example.
Further, as shown in FIG. 3d, a connecting portion 12 is provided only at one end of the coupling device 1 to connect the rotating shaft 2 of the motor 60 to the connecting portion 12, and the other end of the coupling device 1 is connected to a hollow portion. The shaft inserted into the measuring shaft 3 may be connected to the measuring shaft 3 using a second coupling 70 that is fixed by a screw 71.

  3d shows a state in which the coupling device 1 and the second coupling are connected, FIG. 3d1 shows the left side, FIG. 3d2 shows a front view, and FIG. 3d3 shows the coupling device 1 and the second coupling. The cross section of this coupling 70 is typically represented.

It is a figure showing the coupling apparatus which concerns on embodiment of this invention. It is a figure showing the mechanism of the connection part of the coupling apparatus which concerns on embodiment of this invention. It is a figure which shows the usage pattern and other structural example of the coupling apparatus which concerns on embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Coupling apparatus, 2 ... Rotating shaft, 3 ... Measuring axis, 11 ... Base part, 12 ... Connection part, 51 ... Measuring apparatus main body, 52 ... Moving stage, 60 ... Motor, 70 ... 2nd coupling, 111 DESCRIPTION OF SYMBOLS ... Flange, 121 ... Slide member, 122 ... Chuck member, 123 ... Coil spring, 1211 ... Stopper part, 1222 ... Through-hole, 1223 ... Claw, 1224 ... Cutting.

Claims (4)

A coupling device for connecting a measurement shaft of a measurement device and a rotation shaft to be measured,
A base part;
And connecting portions provided at both ends of the base portion,
Each of the connecting parts is
A hollow cylindrical slide member mounted to be slidable in the axial direction with respect to the base portion;
A chuck having a head formed by a plurality of concentrically arranged claws and fixed to the base portion in a form inserted into a hollow portion of the slide member;
An urging member,
The chuck has an expanding force of the plurality of claws due to elasticity,
As the slide member slides relative to the base portion, the slide member is fitted to and detached from the chuck head to open and close the chuck head.
The coupling device according to claim 1, wherein the biasing member biases the slide member in a position direction in which the slide member is fitted to a head of the chuck.
The coupling device according to claim 1,
The coupling device according to claim 1, wherein the biasing member is a coil spring disposed in a form in which the chuck is passed through the hollow portion of the slide member.
A connecting device for connecting a rotating shaft to be measured to a measuring shaft of a measuring device,
A hollow cylindrical slide member attached to the base portion connected to the measurement shaft so as to be slidable in the axial direction with respect to the base portion;
A chuck having a head formed by a plurality of concentrically arranged claws and fixed to the base portion in a form inserted into a hollow portion of the slide member;
An urging member,
The chuck has an expanding force of the plurality of claws due to elasticity,
As the slide member slides relative to the base portion, the slide member is fitted to and detached from the chuck head to open and close the chuck head.
The urging member urges the slide member in a position direction in which the slide member is fitted to the head of the chuck.
The connecting device according to claim 3,
The urging member is a coil spring disposed in a hollow portion of the slide member so as to penetrate the chuck.