JP2022094528A - Object moving device - Google Patents

Abstract

To provide an object moving device capable of preventing from changing a cable feeding amount or a winding amount even when a reduction ratio of a gear in a motor unit changes.SOLUTION: An object moving device includes: a cylindrical drum that is located outside a motor unit including a motor, a gear for transmitting the power of the motors, and a motor housing for storing the motor and the gear, and is connected to a rotation shaft rotated by the gear to wind and feed a cable; a magnet provided on the dram and rotating with the drum; and a sensor detecting a rotational position of the drum by detecting a change in a magnetic flux generated from the magnet.SELECTED DRAWING: Figure 2

Description

The present invention relates to an object moving device.

Patent Document 1 discloses an electric motor used for a power window of an automobile. The electric motor disclosed in Patent Document 1 includes a rotor, a gear that reduces the rotation speed of the rotor, an output gear that functions as an output shaft rotated by the gear, and a housing that covers the rotor. There is.

The output gear projects from the inside of the housing to the outside and is connected to the drum. A cable is spirally wound around the drum.

Further, this electric motor includes a magnet arranged in an annular shape around an output shaft connected to the rotor, and a plurality of magnetic sensors for detecting the magnetic flux generated by the magnet.

Then, when the drum rotates forward or reverse due to the rotation of the rotor of the electric motor, the cable is unwound from the drum or wound around the drum, and the carrier plate connected to the cable moves up and down on the guide rail. As a result, the window glass attached to the carrier plate rises or falls.

Further, when the rotor of the electric motor rotates, the above-mentioned magnet rotates. Then, the amount of rotation of the rotor is detected based on the position information output from the plurality of magnetic sensors as the magnet rotates.

Japanese Unexamined Patent Publication No. 2001-27547

However, although the motor disclosed in Patent Document 1 can detect the amount of rotation of the rotor, when trying to detect the moving distance of the carrier plate that moves up and down, it is necessary to make a correction according to the reduction ratio of the gear. There was a problem.

Specifically, in this motor, the amount of rotation of the rotor is detected by detecting the magnetic flux generated by the magnet arranged on the output shaft of the rotor, but when the reduction ratio of the gear is changed. Even if the rotation amount of the rotor is the same, the feeding amount or the winding amount of the cable changes.

Therefore, there is a problem that the open / closed position of the window glass cannot be accurately controlled unless the position information output from the magnetic sensor is corrected according to the reduction ratio.

An object of the present invention is to provide an object moving device capable of preventing a change in a cable feeding amount or a winding amount even when a reduction ratio of a gear in a motor unit changes.

The object moving device of the present invention is arranged outside a motor unit including a motor, a gear for transmitting the power of the motor, and the motor and a motor housing for accommodating the gear, and is rotated by the gear. A cylindrical drum connected to a shaft to wind or unwind a cable, a magnet provided on the drum that rotates with the drum, and a change in magnetic flux generated from the magnet to detect a change in the amount of rotation of the drum. It is equipped with a sensor to detect.

According to the present invention, it is possible to obtain an object moving device capable of preventing the change in the feeding amount or the winding amount of the cable even when the reduction ratio of the gear in the motor unit changes.

The figure which shows the structural example of the object moving apparatus 100 which concerns on embodiment of this invention. An exploded perspective view of the drive unit 30 An exploded perspective view of the drive unit 30 The figure for demonstrating the 1st modification of the drive part 30 The figure for demonstrating the 2nd modification of the drive part 30

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Object moving device 100]
FIG. 1 is a diagram showing a configuration example of an object moving device 100 according to an embodiment of the present invention. The object moving device 100 is attached to the inner panel of the door of the vehicle, and is applied to a wind regulator or the like that moves the window glass attached to the carrier plate 40 by moving the carrier plate 40.

In the embodiment of the present invention, the moving object is a window glass attached to the carrier plate 40.

When the application example is a wind regulator, the vertical direction of the wind regulator and the moving direction of the carrier plate 40 are the vertical directions defined with reference to the vertical direction of the window glass which is the moving object.

The object moving device 100 includes a guide rail 10, a pulley portion 20, a driving portion 30, a carrier plate 40, and a cable 50.

(Pulley part 20)
The pulley portion 20 provided at the end of the guide rail 10 is a member having a pulley that changes the moving direction of the cable 50 and a structure that supports the rotation axis of the pulley.

(Cable 50)
The cable 50 is a member for transmitting the driving force generated by the driving unit 30 to the carrier plate 40, and is, for example, a flexible cable obtained by twisting a metal wire, a resin fiber wire, or the like.

(Drive unit 30)
The drive unit 30 is a device that moves the carrier plate 40 by winding and unwinding the cable 50.

Next, a configuration example of the drive unit 30 will be described with reference to FIGS. 2 and 3.

2 and 3 are exploded perspective views of the drive unit 30. As shown in FIGS. 2 and 3, the drive unit 30 includes a motor unit 300 and a drum unit 310.

(Motor unit 300)
The motor unit 300 includes a motor 302, a reduction mechanism 303, an output shaft 304, and a motor housing 301.

The motor 302 is a rotary electric machine for rotating the drum 315. The motor 302 is fixed to the motor housing 301, for example, with screws or the like.

The speed reduction mechanism 303 is a mechanism that combines a worm gear, a worm wheel, and the like for decelerating the rotational force of the motor 302 and transmitting it to the drum 315. The deceleration mechanism 303 is housed in the motor housing 301.

The output shaft 304 is a rotation shaft for transmitting the rotation of the motor 302 decelerated by the deceleration mechanism 303 to the drum 315.

The output shaft 304 is provided coaxially with, for example, a worm wheel constituting the deceleration mechanism 303. The tip of the output shaft 304 protrudes to the outside of the motor housing 301.

The motor housing 301 is a housing for accommodating the motor 302, the deceleration mechanism 303, and the like. The motor housing 301 is formed with a through hole for inserting the fastening member 305.

The fastening member 305 is a bolt for fixing the drum unit 310 to the motor unit 300.

(Drum unit 310)
The drum unit 310 includes a drum 315, a drum housing 311 and a magnet cover 312, a magnet 313, and a magnet installation member 314.

The drum 315 is a cylindrical member for winding or unwinding the cable 50 shown in FIG.

A spiral groove 315b for winding the cable 50 is formed on the outer peripheral surface of the drum 315.

The drum housing 311 is a housing for accommodating the drum 315.

As shown in FIG. 3, a recess 311b for rotatably accommodating the drum 315 is formed on the surface of the drum housing 311 facing the motor unit 300.

A columnar support portion 311d is provided at the bottom portion 311c of the recess 311b.

The support portion 311d is a member for supporting the tip end portion of the output shaft 304 shown in FIG. A hole into which the tip of the output shaft 304 can be inserted is formed in the central portion of the support portion 311d.

Further, the drum housing 311 is formed with an opening 317 for guiding the cable 50 wound around the drum 315 to the outside of the drum housing 311.

Further, the drum housing 311 is formed with a fastened portion 311a into which the male screw portion of the fastening member 305 is screwed.

The magnet installation member 314 is a member for installing the ring-shaped magnet 313 on the end face of the drum 315. The end surface of the drum 315 is a surface opposite to the motor unit 300 side of the drum 315.

The magnet installation member 314 is a member formed of stainless steel, iron, or the like in an annular shape. A plurality of caulking portions 314a are formed on the inner peripheral portion of the magnet installation member 314.

The plurality of caulking portions 314a are arranged at equal intervals with respect to the circumferential direction of the magnet installation member 314.

In order to fix the magnet installation member 314 on which the caulking portion 314a is formed to the end surface of the drum 315, the caulking portion 314a is fitted into the fitting hole 315a of the drum 315.

Then, by crimping the crimped portion 314a, the crimped portion 314a is engaged with the fitting hole 315a of the drum 315. As a result, the magnet installation member 314 is fixed to the end face of the drum 315.

The magnet 313 is fixed to the magnet installation member 314 with, for example, an adhesive. As a result, the magnet 313 is fixed to the end face of the drum 315 via the magnet installation member 314.

By fixing the magnet 313 to the drum 315 using the magnet installation member 314 in this way, for example, even when the end face of the drum 315 is drilled for weight reduction, the magnet 313 can be attached to the drum 315. Can be installed stably on the end face of the.

The adhesive is, for example, an epoxy resin-based adhesive, an acrylic resin-based adhesive, or the like. In particular, a two-component epoxy resin adhesive that does not require heating during curing is preferable. As a result, it is possible to suppress a decrease in the magnetic force of the magnet 313 due to an increase in temperature.

The magnet 313 is a permanent magnet in which a magnetic material such as a ferrite type or an Nd (neodymium) -Fe (iron) -B (boron) type is formed in an annular shape.

The magnet 313 has a first magnetic pole and a second magnetic pole that are alternately arranged in the rotation direction of the drum 315. The first magnetic pole is, for example, the north pole. The second magnetic pole is a magnetic pole different from that of the first magnetic pole, and in this case, it is the S pole.

For example, when the magnet 313 has 10 first magnetic poles and 10 second magnetic poles, the first magnetic pole and the second magnetic pole are 18 ° (= 360 ° / 20) in the rotation direction of the drum 315. ) Pitch and are arranged at equal intervals.

The magnet cover 312 is a protective member for preventing the magnet 313 from hitting the drum housing 311, the sensor unit, or the like and cracking when the drum 315 moves in the extending direction of the output shaft 304 during the operation of the drive unit 30.

The magnet cover 312 is a member in which a ferromagnetic material such as stainless steel, iron, or nickel is formed in an annular shape.

The material of the magnet cover 312 is not limited to these, and may be any material that can pass the magnetic flux generated from the magnet 313.

The magnet cover 312 is installed on the surface of the magnet 313 opposite to the magnet installation member 314 side. The magnet cover 312 is fixed to the magnet 313, for example, with an adhesive.

The sensor unit 316 is a unit for detecting the amount of rotation of the drum 315. The sensor unit 316 includes a Hall IC (Integrated Circuit) 316a, an arithmetic circuit 316b, and a substrate 316c.

The Hall IC 316a detects a change in the magnetic flux generated from the magnetic poles constituting the magnet 313, and outputs a voltage corresponding to the change in the magnetic flux. The Hall IC 316a is an example of a sensor that detects the amount of rotation of the drum 315 by detecting a change in the magnetic flux generated from the magnet 313 of the present disclosure. Although the rotation amount of the drum 315 is detected here, the rotation angle and the rotation speed of the drum 315 may be detected instead of the rotation amount.

The Hall IC 316a transmits a voltage corresponding to a change in magnetic flux to the arithmetic circuit 316b.

The sensor that detects the change in magnetic flux is not limited to the Hall IC 316a, and for example, an MR (Magnet-Resistive) element whose electrical resistance changes depending on the strength of magnetism and an MI (Magnet-Impedance) effect. An MI sensor or the like using the above may be used.

The arithmetic circuit 316b is a circuit that outputs a signal indicating the rotation amount and the rotation direction of the drum 315 based on the voltage output from the hall IC 316a.

The board 316c is a circuit board for electrically connecting the hall IC 316a and the arithmetic circuit 316b and connecting the arithmetic circuit 316b to the wiring for transmitting the signal output from the arithmetic circuit 316b.

The substrate 316c is fixed to the drum housing 311 so that the hole IC 316a faces the magnet cover 312 and a certain gap is formed between the hole IC 316a and the magnet cover 312.

When assembling the drive unit 30, first, the drum 315 is assembled to the motor unit 300 so that the output shaft 304 of the motor unit 300 is inserted into the fitting hole 315a of the drum 315.

Next, the magnet installation member 314, the magnet 313, and the magnet cover 312 are attached to the drum 315. The magnet installation member 314, the magnet 313, and the magnet cover 312 may be integrally manufactured in advance and then assembled to the drum 315, or the magnet installation member 314, the magnet 313, and the magnet cover 312 may be assembled to the drum 315 in this order. You may.

Then, the drum housing 311 is combined with the motor housing 301 so that the drum housing 311 covers the drum 315.

At this time, the tip of the output shaft 304 penetrating the fitting hole 315a of the drum 315 is inserted into the hole formed in the support portion 311d of the drum housing 311.

After the drum housing 311 is combined with the motor housing 301, the fastening member 305 is inserted into the through hole 301a formed in the motor housing 301, and the male screw portion of the fastening member 305 is inserted into the fastened portion 311a of the drum housing 311. Screw in. As a result, the drum housing 311 is fixed to the motor housing 301.

(Operation of drive unit 30)
When the motor 302 provided in the drive unit 30 rotates in the forward direction, the rotational motion of the motor 302 is transmitted to the drum 315 via the power transmission unit, so that the drum 315 rotates in the forward direction. In this case, one end side of the cable 50 is wound around the drum 315, and the other end side of the cable 50 is unwound from the drum 315. As a result, the two carrier plates 40 are lowered.

On the other hand, when the motor 302 provided in the drive unit 30 rotates in the opposite direction, the drum 315 rotates in the opposite direction, so that the other end side of the cable 50 is wound around the drum 315 and one end side of the cable 50 is the drum 315. It is delivered from. This raises the two carrier plates 40.

Further, since the magnetic flux of the magnet 313 detected by the hall IC 316a changes with time due to the rotation of the drum 315, for example, by using the signal output from the arithmetic circuit 316b, the rotation amount of the drum 315 and the amount of rotation of the drum 315 can be used. The direction of rotation can be detected.

Here, the feeding amount or winding amount of the cable 50 can be accurately estimated from the rotation amount and the rotation direction of the drum 315 for feeding or winding the cable 50. Therefore, the moving direction, the moving amount, and the like of the moving object can be finely controlled by the driving unit 30.

On the other hand, in the publicly known technique described in Patent Document 1, for example, when the rotor of the motor rotates, the magnets arranged in an annular shape around the output shaft connected to the rotor rotate, and the rotation thereof. A plurality of magnetic sensors detect the change in magnetic flux due to the above, and the amount of rotation of the rotor is detected based on the position information of the rotor output from those magnetic sensors.

However, although the known technique described in Patent Document 1 can detect the amount of rotation of the rotor, when trying to detect the moving distance of the carrier plate that moves up and down, it is necessary to make a correction according to the reduction ratio of the gear. ..

For example, the reduction ratio of the gear may change when the type of the motor unit 300 combined with the drum unit 310 differs depending on the specifications of the manufacturer, the model cycle, and the like. In such a case, even if the rotation amount of the rotor is the same, the feeding amount or the winding amount of the cable changes. Therefore, unless the position information output from the magnetic sensor is corrected according to the reduction ratio, the opening / closing position of the window glass cannot be accurately controlled.

In the object moving device 100 according to the embodiment of the present invention, since the drum 315 is provided with the magnet 313, even if the type of the motor unit 300 combined with the drum unit 310 is different, it depends on the type of the motor unit 300. It is possible to control the raising and lowering of the moving object without changing the settings of the winding amount and the feeding amount of the cable 50.

Further, according to the object moving device 100 according to the embodiment of the present invention, the diameter of the drum 315 provided with the magnet 313 is relatively larger than the diameter of the rotor of the motor 302, so that the magnet 313 has a diameter of the magnet 313. The number of magnetic poles is increased, and the detection accuracy of the rotation amount of the drum 315 is greatly improved. As a result, fine control of the moving object becomes possible.

Further, by providing the object moving device 100 according to the embodiment of the present invention in the vehicle, the feeding amount and the winding amount of the cable 50 are based on the rotation amount of the drum 315, not the rotation amount of the rotation shaft of the motor 302. The amount can be calculated. Therefore, as compared with the case of calculating the feeding amount and the winding amount of the cable 50 based on the rotation amount of the motor 302, it is possible to realize the operation of the moving object more realistically.

Hereinafter, a modified example of the drive unit 30 according to the embodiment of the present invention will be described with reference to FIGS. 4 and 5.

FIG. 4 is a diagram for explaining a first modification of the drive unit 30.

In the drive unit 30 according to the first modification, a plurality of magnets 313A arranged apart from each other in the rotation direction of the drum 315 are used instead of the annular magnet 313.

The plurality of magnets 313A are composed of a plurality of first magnetic poles and a plurality of second magnetic poles. The first magnetic pole and the second magnetic pole are arranged apart from each other in the rotation direction of the drum 315.

The plurality of magnets 313A are provided on the end face 315d of the drum 315. The plurality of magnets 313A may be provided on the end surface 315d of the drum 315 integrally with the drum 315, or may be manufactured separately from the drum 315 and then attached to the end surface 315d of the drum 315, separately from the drum 315. The body magnet 313A may be used.

According to the drive unit 30 according to the first modification, by providing the plurality of magnets 313A on the end surface 315d of the drum 315, the magnet installation member 314 becomes unnecessary, so that the structure of the drive unit 30 is simplified and the drive unit 30 is provided. The manufacturing cost of 30 can be reduced.

FIG. 5 is a diagram for explaining a second modification of the drive unit 30.

The drive unit 30 according to the second modification includes a plurality of magnets 313B arranged apart from each other in the rotation direction of the drum 315.

In the drive unit 30 according to the second modification, a plurality of magnets 313B are provided on the outer peripheral surface 315c of the drum 315.

The plurality of magnets 313B may be integrally provided on the outer peripheral surface 315c of the drum 315, or may be a magnet 313B separate from the drum 315, which is manufactured separately from the drum 315 and then attached to the drum 315.

In the drive unit 30 according to the second modification, the sensor unit 316 is provided at a position facing the outer peripheral surface 315c of the drum 315. In this case, the sensor unit 316 is fixed to the inner peripheral surface of the recess 311b of the drum housing 311 shown in FIG.

According to the drive unit 30 according to the second modification, by providing the plurality of magnets 313B on the outer peripheral surface 315c of the drum 315, the magnet installation member 314 becomes unnecessary, so that the structure of the drive unit 30 is simplified and the drive unit 30 is driven. The manufacturing cost of the unit 30 can be reduced.

Further, since the magnet installation member 314, the magnet cover 312, and the like are not required, the region where the end face of the drum and the drum housing face each other can be narrowed, so that the size of the drive unit 30 can be reduced.

The sensor unit 316 according to the embodiment of the present invention may be rubber-coated. By applying the rubber coating, the vibration of the drum unit 310 is less likely to be transmitted to the sensor unit 316. Therefore, it is possible to prevent the Hall IC 316a from being damaged by vibration.

Further, the sensor unit 316 may be waterproofed. For example, waterproofing can be performed by covering the entire circumference of the sensor unit 316 with an insulating synthetic resin.

By waterproofing the sensor unit 316, it is possible to prevent the hall IC 316a from being flooded. Further, since it is possible to prevent dust from adhering to the substrate 316c of the sensor unit, deterioration of the insulating performance can be suppressed and the drive unit 30 can be used for a long period of time.

Further, since the sensor unit 316 can be fixed to the drum housing 311 in a state of being covered with synthetic resin, robust rotation amount detection that is not easily affected by vibration, impact, etc. becomes possible.

In addition, by covering the sensor unit 316 with synthetic resin, the replacement cycle of the sensor unit 316 can be lengthened, so that it can be moved stably for a long period of time even in an environment where the vehicle is overused, especially in hot and humid areas. The operation of things can be guaranteed.

It should be noted that, for example, the following aspects are also understood to belong to the technical scope of the present disclosure.

(1) The object moving device is arranged outside the motor unit including the motor, the gear for transmitting the power of the motor, and the motor and the motor housing for accommodating the gear, and is rotated by the gear. A cylindrical drum connected to a shaft to wind or unwind a cable, a magnet provided on the drum that rotates with the drum, and a change in magnetic flux generated from the magnet to detect a change in the amount of rotation of the drum. It is equipped with a sensor to detect.

(2) The gear reduces the rotation speed of the motor.

(3) A drum housing for accommodating the drum and the magnet is further provided, and the sensor is provided at a position of the drum housing facing the drum.

(4) The magnet is a ring-shaped magnet.

(5) The magnet is arranged on a surface of the drum opposite to the motor housing side.

It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is shown not by the above description but by the scope of claims, and is intended to include all modifications within the meaning and scope such as equality with the scope of claims.

The embodiment of the present invention has been described above. The above description is an example of a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto. That is, the description of the configuration of the device and the shape of each part is an example, and it is clear that various changes and additions to these examples are possible within the scope of the present invention.

The object moving device according to the present invention can prevent the cable feeding amount or winding amount from changing even when the reduction ratio of the gear in the motor unit changes.

10 Guide rail 20 Pulley part 30 Drive part 40 Carrier plate 50 Cable 100 Object moving device 300 Motor unit 301 Motor housing 301a Through hole 302 Motor 303 Deceleration mechanism 304 Output shaft 305 Fastening member 310 Drum unit 311 Drum housing 311a Fastened part 311b Recess 311c Bottom 311d Support 312 Magnet Cover 313 Magnet 313A Magnet 313B Magnet 314 Magnet Installation Member 314a Caulking 315a Drum 315a Fitting Hole 315b Groove 315c Outer Surface 315d End Face 316c
317 opening
316a Hall IC

Claims (5)

A motor is located outside a motor unit comprising a motor, a gear that transmits the power of the motor, and a motor housing that houses the motor and the gear, and is connected to a rotating shaft rotated by the gear to wind a cable. Cylindrical drums to be taken out or fed out, and
A magnet provided on the drum and rotating with the drum,
A sensor that detects the amount of rotation of the drum by detecting changes in the magnetic flux generated from the magnet, and
An object moving device equipped with. The object moving device according to claim 1, wherein the gear reduces the rotation speed of the motor. Further provided with a drum housing for accommodating the drum and the magnet.
The object moving device according to claim 1 or 2, wherein the sensor is provided at a position of the drum housing facing the drum. The object moving device according to any one of claims 1 to 3, wherein the magnet is a ring-shaped magnet. The object moving device according to any one of claims 1 to 4, wherein the magnet is arranged on a surface of the drum opposite to the motor housing side.

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