JP2016174460A - Magnetic levitation type brake motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic levitation type brake motor.SOLUTION: A magnetic levitation type brake motor is applied to an electric screwdriver. A magnetic levitation clutch 2 is coupled to a motor 1 for outputting power. Current at the startup time of the motor is reduced by the interaction of the same-poles repel and opposite-poles attraction at the operation time of the magnetic levitation clutch. The motor has a small inertia moment and frictional force. Heat generation and damage to control the driving current of the motor is reduced. Accordingly, on the operation, the magnetic levitation clutch rotates after starting up while following the motor, thereby increasing the inertia moment, and also kinetic energy is accumulated. When encountering a load, the rotation speed of the magnetic levitation clutch is reduced, and the kinetic energy is released, so that the torque is increased. When the torque is preset, the motor stops its rotation, and the magnetic levitation clutch sustains its rotation by the inertia moment. However, magnetic resistance occurring by the action of magnetic poles gradually stops, and thus the reaction force when the clutch is stopped is reduced.SELECTED DRAWING: Figure 1

Description

The present invention relates to a combination structure of a motor and a clutch used for an electric driver, and more particularly to a magnetic levitation brake motor used for an electric driver.

When starting a motor from a stationary state and putting it into a running state, instantaneously supplying large kinetic energy destroys the equilibrium and rotates the rotor. The smaller the load on the rotor, the less the kinetic energy required for starting, whereas the larger the load on the rotor, the more kinetic energy required for starting.

However, in the above-described conventional technology, for example, a large supply current is usually required when a general electric driver is activated, and the motor is smoothly activated to operate at high speed. Moreover, since it is necessary to start repeatedly when tightening a screw each time, there is much power consumption. In a typical screw tightening operation with a fixed torque value, the screw initially has no load (negligibly small), but when the screw thread contacts the object, some load is generated due to frictional resistance, In this process, the idle rotation of the screw occurs, and finally the load increases rapidly until the fixed torque is stopped by the action of tension after the screw head is screwed into contact with the surface of the object. Although this starting current is small as described above, the torque value is limited, and the range in which fastening is possible is also limited.

In addition, an electric screwdriver with a large torque has the disadvantage that a large amount of power is consumed because it requires a current when starting up.In addition, the maximum torque value is often required for engagement, and a considerably large reaction is caused by the disengagement of the clutch. Force was generated, and when the operator engaged the fastening work, an error occurred in the torque, and in the long term, the operator was easily injured.

   Therefore, the present inventor considered that the above-mentioned drawbacks can be improved, and as a result of intensive studies, the present inventor has arrived at a proposal of the present invention that effectively improves the above-described problems by rational design.

The present invention has been made in view of such conventional problems. In order to solve the above problems, it is a main object of the present invention to provide a magnetically levitated brake motor. In other words, this reduces the error in torque generated when operating the electric screwdriver, avoids a decrease in torque accuracy when used for a long period of time, and achieves the effect of increasing the accuracy of torque overall.

Another object of the present invention is to provide a magnetically levitated brake motor. In other words, this reduces the current required to start the electric driver, has a soft start action, and simultaneously provides a brake action when stopped.

The present invention for solving the above-described problems and achieving the above-described object is as follows.
A magnetically levitated brake motor used for electric drivers,
A motor that supplies a power source, and a magnetic levitation clutch that is coupled to a shaft of the motor, has alternating magnetic repulsion and magnetic attraction, and provides a soft start and braking action for an electric driver. Magnetic levitation brake motor.

As a result, the current at the start of the motor is reduced by the interaction between the same-polarity repulsion and the different-polarity attraction when the magnetic levitation clutch is operated, and the motor has a small inertia moment and frictional force to control the motor drive current. This reduces the heat generation and damage to the MOSFET.

Preferably, the magnetic levitation clutch includes an active member, a passive member attached to the active member, and a pin for connecting to the active member and the passive member.

Preferably, at least two or more magnetic bodies that are installed with dislocations are uniformly distributed on the surface on which the active member and the passive member are attached to each other, and the same polarity is installed. .

Preferably, a first elastic body is installed between the active member and the passive member.

Preferably, a second elastic body is installed between the active member and the passive member.

Preferably, the above-described magnetic levitation clutch includes an active member in which a shaft of a motor is drilled and positioned, and a passive member attached to the active member, and the active member and the passive member are At least two or more magnetic materials arranged dislocations are uniformly distributed on the surfaces to be bonded to each other, and the polarities are oppositely arranged.

Preferably, the above-described magnetic levitation clutch includes an active member in which a shaft of a motor is drilled and positioned, and a passive member attached to the active member, and the active member and the passive member include A magnetic body and a magnetically permeable material are respectively employed and manufactured.

Preferably, the above-described magnetic levitation clutch includes an active member in which a shaft of a motor is drilled and positioned, and a passive member attached to the active member, and the active member and the passive member include At least two or more magnetic bodies arranged at intervals on the surfaces to be adhered to each other, and at least two concave surfaces arranged at intervals, and a magnetically permeable material installed with dislocations Are adopted.

Preferably, the above-described magnetic levitation clutch is coupled to a front end or a rear end of a shaft in the motor.

Preferably, the above-described magnetic levitation clutch is coupled to the front end or rear end of the shaft outside the motor.

Preferably, the magnetic levitation clutch described above employs two sets of front and rear ends respectively coupled to a shaft outside the motor.

Preferably, the magnetic levitation clutch described above is coupled to a reduction configuration of the shaft outside the motor in the electric driver.

Due to the interaction between homopolar repulsion and heteropolar attraction during operation of the magnetic levitation clutch according to the present invention, the current at the start of the motor is reduced, the motor has a small moment of inertia and friction force, and the drive current of the motor is controlled This reduces the heat generation and damage to the MOSFET.

It is a conceptual diagram which shows the motor structure used for the automatic driver of this invention. It is a key map explaining the brake composition of magnetic levitation concerning the present invention. FIG. 3 is a schematic cross-sectional view showing C1-C1 shown in FIG. FIG. 3 is a schematic cross-sectional view showing C2-C2 shown in FIG. It is a conceptual diagram explaining the magnetic body structure of the magnetic levitation clutch which concerns on this invention. It is a conceptual diagram which shows the motor structure used for the other automatic driver of this invention. It is another embodiment figure of a magnetic levitation clutch concerning the present invention. It is another embodiment figure of a magnetic levitation clutch concerning the present invention. It is a conceptual diagram (1) which couple | bonds the magnetic levitation clutch and motor which concern on this invention. It is a conceptual diagram (2) which couple | bonds the magnetic levitation clutch and motor which concern on this invention. It is a conceptual diagram (3) which couple | bonds the magnetic levitation clutch and motor which concern on this invention. It is a conceptual diagram (4) which couple | bonds the magnetic levitation clutch and motor which concern on this invention. It is a conceptual diagram (5) which couple | bonds the magnetic levitation clutch and motor which concern on this invention. It is a conceptual diagram (six) which couple | bonds the magnetic levitation clutch and motor which concern on this invention.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments described below.
<First Embodiment>

Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. The magnetically levitated brake motor according to the present invention includes a motor (1) that provides a power source, and a magnetically levitated clutch (2) that provides a braking action.

 The shaft (11) of the motor (1) passes through the magnetic levitation clutch (2) and achieves fixed fixation, and the magnetic levitation clutch (2) when the motor (1) starts and rotates. Rotate in sync with each other. The magnetic levitation clutch (2) includes an active member (21), a passive member (22) attached to the active member (21), and the active member (21) and the passive member (22). (23) (see FIGS. 1 to 5).

At least two or more magnetisms (211) are uniformly distributed on the surfaces of the active member (21) and the passive member (22) attached to each other. Similarly, at least two or more magnetic bodies (221) are evenly distributed on the surfaces of the passive member (22) and the active member (21) attached to each other, and the active member (21). The surface magnetic body (211) and the passive body (22) surface magnetic body (221) are placed with dislocations, but the same polarity (ie, N-pole vs. N-pole, or S Pole pair S pole). Accordingly, when the magnetic levitation clutch (2) rotates in conjunction with each other, a repulsive action is formed by the plurality of magnets (211 and 221) installed with the same polarity, and a thrust is generated naturally, and the magnetic repulsion is generated. When the active member (21) is activated or decelerated by the action, torque is generated to stop the rotation of the passive member (22).

When the magnetic levitation brake motor is actually operated by an electric driver, when the motor (1) is started and operated, the shaft (11) synchronizes the active member (21) of the magnetic levitation clutch (2). The active member (21) is connected by the pin (23) so that the receiving member (22) attached to each other is rotated in conjunction with the active member (21). At this time, the moment of inertia of the shaft (11) increases and the kinetic energy accelerometer accelerates with the rotation speed, and the gear mechanism, clutch mechanism, driver head and other units in the electric driver are further linked. The normal operation of the electric screwdriver is started. The motor (1) is driven at high speed by the thrust of the same polarity repulsion of the magnetic bodies (211 and 221), and the gear mechanism, the clutch mechanism, etc. are linked together to start the high speed operation. In this starting process, since it is not necessary to operate all the mechanisms in close contact with each other, only a small current is supplied to the motor (1). The horsepower and rotational speed are increased by an asymptotic method in synchronism with the thrust action of 211, 221). This achieves the effect of mechanical soft start.

When fastening is performed (ie, the driver head encounters a soft or hard load), the operation of the driver head is decelerated, and the rotation speed of the active member (21) of the magnetic levitation clutch (2) is also reduced. The speed is reduced accordingly, and the passive member (22) releases the kinetic energy and supplies it to the active member (21), thereby increasing the maximum torque of the clutch mechanism.

 After the engagement is completed, the clutch mechanism is engaged with the electric screwdriver and has a releasing action when the torque value is preset, and the active member (21) of the magnetic levitation clutch (2) stops rotating. At this time, the passive member (22) rotates because the moment of inertia continues, but the kinetic energy due to the rotation described above is generated with the same or different polarity of a plurality of magnets (211 and 221) attached to each other. Absorbed by the reluctance magnetoresistive to produce a braking effect, the motor (1) stops operating.

In addition, when the electric screwdriver starts and operates the motor (1) and the load reaches the maximum torque value, the clutch mechanism is disengaged, and the motor (1) The reaction force generated when stopping from high-speed rotation is reduced by the auxiliary brake action provided by the magnetic levitation clutch (2), reducing the operator's occupational trauma and reducing the operator's torque error. , Improve the accuracy of torque of the power tool.

As shown in FIG. 6, the brake when the motor (1) is stopped by the magnetic bodies (211 and 221) between the active member (21) and the passive member (22) of the magnetic levitation clutch (2) described above. An action is provided. Further, it is installed between the active member (21) and the passive member (22) and is separated from the shaft (11), and a pin (23) is drilled and placed in the seal (241), and The outer cover is covered by the copper (242), so that when the electric screwdriver reaches the preset torque value, the active member (21) provides an auxiliary brake action on the passive member (22) after the clutch mechanism is disengaged The first elastic body (24) that enhances the braking effect, and is installed between the active member (21) and the passive member (22) and approaches the shaft (11) to One side of one or more balls (252), a fixing device (254), and a brake board (253) are installed around the bearing (251) on the surface, so that the electric screwdriver is preset When the torque value is reached and the clutch mechanism is disengaged, the active member (21) is received. Reducing the impact sound for member (22), further comprising a second elastic body having a GenShin effect (25).

As a result, when the motor (1) is started up, the remaining mechanism is deactivated, and after the shaft (11) is rotated, the elastic body (24) is interlocked to generate a squeezing action, thereby operating the acceleration device. The gear driver, the clutch mechanism, and the like are linked together and the electric driver starts operating. Thus, when the electric driver stops, the motor (1) becomes a secondary auxiliary brake by the anti-propulsion action of the magnetic levitation clutch (2), the first elastic body (24), and the second elastic body (25). And provide a seismic reduction effect.

Further, as shown in FIG. 7, the magnetic levitation clutch (2) according to the present invention has the structure described below except that the torque is stopped by the magnetic repulsion action in addition to the structure shown in FIG. A form may be adopted. An active member (21) in which the shaft (11) of the motor (1) is drilled and positioned, and a passive member (22) attached to the active member (21) are provided. At least two or more magnetic bodies (211) are uniformly distributed on the surfaces of the active member (21) and the passive member (22) attached to each other. Similarly, the passive member (22) and the active member (22) At least two or more magnetic bodies (221) are evenly distributed on the surfaces of the members (21) attached to each other, and the magnetic bodies (211) and the passive members (22) on the surface of the active member (21). ) Is disposed with dislocations, but with opposite polarities (ie, N pole pair S pole, or S pole pair N pole). As a result, when the magnetic levitation clutch (2) rotates in conjunction with each other, a plurality of magnetic bodies (211 and 221) installed with different polarities as described above form a mutual attracting action, which naturally generates a tensile force. In addition, the magnetic attractive action causes the active member (21) to decelerate at the time of startup and pull the passive member (22) to rotate, and at the time of deceleration to generate torque that pulls the passive member (22) and stops rotation. Thus, the torque output by the active member (21) is increased, and the reaction force generated by the active member (21) is reduced when stopped.

Furthermore, as shown in FIG. 8, other forms may be adopted as the structure of the magnetic levitation clutch (2) according to the present invention. That is, the active member (21) and the passive member (22) constituting the unit are manufactured by the magnetic body (211) and the magnetically permeable material body (222), respectively, or the active member (21) and the passive member (22). Having at least two or more magnetic bodies (211) arranged at intervals on the surfaces to be bonded to each other and at least two concave surfaces (223) arranged at intervals, A magnetically permeable material body (222) to be presented and installed is provided. Thus, similarly, due to the magnetic attraction action, the active member (21) decelerates at startup and pulls the passive member (22) to rotate, and at the time of deceleration, pulls the passive member (22) to stop rotation. To increase the torque output by the active member (21) and decrease the reaction force generated by the active member (21) when stopped.

9 to 11 are conceptual views of different positions for coupling the magnetic levitation clutch and the motor according to the present invention. In Fig. 9 (A), the magnetic levitation clutch (2) is installed at the front end of the shaft (11) in the motor (1). In Fig. 9 (B), the magnetic levitation clutch (2) is connected to the shaft ( 11) Installed at the rear end. In Fig. 10 (A), the magnetic levitation clutch (2) is installed at the front end of the shaft (11) outside the motor (1). In Fig. 10 (B), the magnetic levitation clutch (2) is installed in the shaft outside the motor (1). (11) Installed at the rear end. In Fig. 11 (A), two sets of magnetic levitation clutches (2) are installed at the front and rear ends of the shaft (11) outside the motor (1). In Fig. 11 (B), the magnetic levitation clutch (2) is installed in the motor. (1) It is installed on the sprocket of the speed reduction configuration (3) connected to the front end of the outer shaft (11), and the magnetic levitation clutch (2) and the speed reduction configuration (3) are combined to form an integral form. The above is the type of the magnetic levitation clutch (2) coupled to the motor (1) inside, outside, front end, rear end, or deceleration configuration, both of which provide soft start and braking action when operating the motor of the electric driver To do.

 The above-described embodiments are merely for explaining the technical idea and features of the present invention, and are intended to allow those skilled in the art to understand the contents of the present invention and to carry out the same with the present invention. It is not intended to limit the scope of the claims. Accordingly, improvements or modifications having various similar effects made without departing from the spirit of the present invention shall be included in the following claims.

(1) Motor (11) Shaft (2) Magnetic levitation clutch (21) Active member (211) Magnetic body (22) Passive member (221) Magnetic body (222) Magnetically permeable material (223) Concave surface (23) Pin (24 ) First elastic body (241) Seal (242) Cover (25) Second elastic body (251) Bearing (252) Ball (253) Brake board (254) Fixture (3) Deceleration configuration

Claims (12)

A magnetically levitated brake motor used for electric drivers,
A motor that supplies a power source; and a magnetic levitation clutch that is coupled to the shaft of the motor, has alternating magnetic repulsion and magnetic attraction, and provides a soft start and braking action for an electric driver. Magnetic levitation brake motor. 2. The magnetic levitation clutch according to claim 1, wherein the magnetic levitation clutch includes an active member, a passive member attached to the active member, and a pin for connecting to the active member and the passive member. Brake motor. The magnetic levitation clutch includes an active member that is positioned by drilling a shaft of a motor, and a passive member that is attached to the active member. The active member and the passive member are attached to each other. 3. The magnetically levitated brake motor according to claim 2, wherein at least two or more magnetic bodies installed with dislocations are uniformly distributed on the surface to be arranged, and are installed with the same polarity. . 3. The brake motor according to claim 2, wherein a first elastic body is installed between the active member and the passive member. 3. The brake motor according to claim 2, wherein a second elastic body is installed between the active member and the passive member. The magnetic levitation clutch includes an active member that is positioned by drilling a shaft of a motor, and a passive member that is attached to the active member. The active member and the passive member are attached to each other. 2. The magnetically levitated brake motor according to claim 1, wherein at least two or more magnetic bodies installed with dislocations are uniformly distributed on the surface to be arranged, and are installed with opposite polarities. . The magnetic levitation clutch includes an active member that is positioned by drilling a shaft of a motor, and a passive member that is attached to the active member. The active member and the passive member include a magnetic body and 2. The magnetically levitated brake motor according to claim 1, wherein each of the magnetically permeable materials is adopted and manufactured. The magnetic levitation clutch includes an active member that is positioned by drilling a shaft of a motor, and a passive member that is attached to the active member. The active member and the passive member are attached to each other. At least two or more magnetic materials arranged at intervals on the surface to be worn and at least two concave surfaces arranged at intervals and a magnetically permeable material installed with dislocations are adopted. 2. The magnetically levitated brake motor according to claim 1, wherein 2. The brake motor according to claim 1, wherein the magnetic levitation clutch is coupled to a front end or a rear end of a shaft in the motor. 2. The magnetically levitated brake motor according to claim 1, wherein the magnetically levitated clutch is coupled to a front end or a rear end of a shaft outside the motor. 2. The magnetically levitated brake motor according to claim 1, wherein the magnetically levitated clutch employs two sets of front and rear ends respectively coupled to a shaft outside the motor. 2. The magnetically levitated brake motor according to claim 1, wherein the magnetically levitated clutch is coupled to a speed reducing structure of a shaft outside the motor in the electric driver.