JPH0511393Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a brake motor distance measurement mechanism.

(Prior art) In general, when a brake motor's magnetic field widens due to brake lining wear due to long-term use, the starting current increases and the impact noise during starting and stopping becomes intense, causing discomfort to the user. Not only does it give a pleasant feeling, but it also shortens the life of the brake motor, and if the brake motor wears out further, the brake will not release and will not be able to start, so measures have been taken to adjust the magnetic field. There is a simple way to remove the adjustment plate between the thin walls. For example, in a brake motor using an axial air type motor, as shown in FIG. When the motor is stopped, a viewing gauge is inserted into the magnetic gap 6 between the stator core 4 and the rotor core 5 through the viewing window 7 provided in the lid 2, and its dimensions are measured, and this value is the magnetic gap 6. If the initial value of 6 exceeds the sum of the thickness of the adjusting plate 3, slightly loosen the bolts 8 that fasten the stator frame 1 and the lid 2. 8
A simple means is adopted to adjust the magnetic field 6 in stages by re-fastening the two.

Also, in a brake motor consisting of a radial air type motor and an axial air type electromagnetic brake, as shown in FIG. A gauge is inserted into the magnetic gap 14 between the movable iron core 13 and the gauge is inserted between the brake cover body 9 and the stator frame 15 in advance based on the measured value as described above.
By removing the adjustment plate 16, the magnetic field can be adjusted in stages.

(Problem to be solved by the invention) However, as shown in Fig. 1, the stator core 2
A rotor core 23 and a magnetic pole body 24 are arranged in a magnetic field of 2, and a brake actuating body 25 having a magnetic ring portion 25a facing the magnetic pole body 24 in the axial direction is provided. This is a so-called pull rotor system in which the brake actuating body 25 is moved in the axial direction against the action of the spring 39 to release the brake by the magnetic attraction force generated by the stator field magnetic flux passing through the ring portion 25a. In the brake motor, the magnetic gap 48 between the magnetic pole body 24 and the magnetic ring portion 25a of the brake operating body 25 is covered by the coil end portion of the stator winding 52 wound around the stator core 22; 48, it was not possible to insert a sight gauge, so I removed the bracket 27, which also served as a brake cover, and disassembled the brake part.
Each brake lining 28, 32, 33, 36,
If the wear amount of 37 is not measured, the interval adjustment plate 41
Therefore, it is extremely difficult for the user of the brake motor to adjust the magnetic gap 48.

Furthermore, the magnetic gap is continuously reduced by the screw action.
In a pull rotor type brake motor that uses a means to adjust the magnetic field, the magnetic field can be determined from the rotation angle of the screw, but the work is more complicated than measuring with a sight gauge, so it is not possible to measure it indirectly. Even in this case, it is preferable that the magnetic field can be measured with a sight gauge.

The present invention was created in view of the above problems.
In the pull rotor type brake motor,
By inserting a gauge from the outside, you can easily measure the magnetic gap of the brake part indirectly, and if you use a gap adjustment plate as a means of adjusting this magnetic gap, you can easily determine when it is time to remove it. It provides a measurement mechanism for brake motors that can be used.

(Means for Solving the Problems) The measuring mechanism of the brake motor of the present invention includes a rotor core and a magnetic pole body arranged within the magnetic field of the stator core, and a magnetic ring axially opposed to the magnetic pole body. The brake actuating body is moved against the action of a spring by a magnetic attraction force generated by the stator field magnetic flux passing through the magnetic ring portion via the magnetic pole body. In a brake motor that moves in the axial direction to release the brake, a measuring surface is formed on the side surface of the rotating brake plate portion on the side of the magnetic ring portion of the rotary brake plate portion provided on the opposite side of the magnetic ring portion of the brake operating body; During this period: When facing the measurement surface or its extension surface: When the measurement board is installed on the stator frame to which the stator core is fixed, and when the brake motor is stopped: Between the measurement surface and the thin wall: Between the measurement plate so that the distance to be measured is a set value wider than the initial value of the magnetic distance between the magnetic pole body and the magnetic ring portion.
The thickness and number of plates are selected, the measurement plate is attached to the measurement surface side of the measurement board, the measurement surface and the measurement surface, the measurement target plate between the measurement plate.
The stator frame is provided with a viewing window into which a viewing gauge can be inserted from the outside.

(Function) Between the brake motor of the present invention: When the brake lining of the brake motor wears out, the axial position of the brake actuating body moves toward the brake side when the brake motor is stopped. Between the magnetic ring part of the actuating body and the magnetic ring between the measuring plate and the brake actuating body
The distance to be measured between the measurement surfaces is enlarged by the wear amount of the brake lining.

Therefore, the amount of wear on the brake lining can be measured by inserting a sight gauge into the space to be measured through the viewing window and measuring its dimensions.
As a result, the magnetic field can be measured indirectly.

(Embodiment) Next, the configuration of an embodiment of the present invention will be described based on FIGS. 1 and 2 of the drawings.

1 and 2 show an embodiment in which the present invention is applied to a multi-plate brake type brake motor, in which a rotor core 23 and a magnetic pole body 24 are placed in a magnetic field of a stator core 22 fixed to a stator frame 21. A brake actuating body 25 having a magnetic ring portion 25a facing the magnetic pole body 24 in the axial direction is attached to the rotary shaft 26 by spline connection so as to be movable in the axial direction. A brake lining 28 fixed to the rotary brake plate part 25b and a stator frame are provided between the rotary brake plate part 25b provided on the opposite side of the part 25a and the stop brake plate part 27a of the bracket 27 which also serves as a brake lid. A first stop braking plate 30 is non-rotatably engaged with a plurality of studs 29 supported between the rotary shaft 21 and the bracket 27 so as to be movable in the axial direction, and a hub 31 attached to the rotating shaft 26 by spline connection is rotated relative to the hub 31. A first rotary brake plate 3 that is loosely fitted with a spline connection so as to be movable in the axial direction and has brake linings 32 and 33 fixed to both sides.
4. A second stop brake plate 35 is engaged with the stud 29 so as to be unrotatable but movable in the axial direction, and is loosely fitted to the hub 31 by spline connection so as to be unrotatable but movable in the axial direction. A second rotary brake plate 38 with brake linings 36 and 37 fixed to both sides is arranged in sequence, a spring 39 is suspended between the magnetic pole body 24 and the brake actuating body 25, and a bolt 40
As shown in FIG. 2, between the stator frame 21 and the bracket 27 which are fastened together, one or more sets of adjustment plates 41 are inserted between the two parts of a thin ring and punched out portions 41a corresponding to the bolts 40. By inserting and clamping them, a so-called pull rotor type brake motor is constructed.

Next, the time measurement mechanism will be explained.

An annular measuring board 42 is provided at the brake side end of the stator frame 21 and also serves as a support plate for the stud 29 and protrudes inwardly.
A step 25c is provided on the outer diameter portion of the rotational braking plate portion 25b, and a step 25c is provided on the side surface of the magnetic ring portion 25a.
A narrow radial gap 44 is formed between the inner peripheral surface of the measurement board 42 and the inner peripheral surface of the measurement board 42 to prevent brake lining wear particles from entering the motor side. Between
The above-mentioned interval of the measurement board 42: A thin rectangular space with a selected thickness and number of sheets on the measurement surface 43 side; A measurement contact plate 45 is attached with rivets 46, etc.; and a measurement contact plate 4
The distance between 5 and the measurement surface 43 when the brake motor is stopped is defined as the distance to be measured 47.

The thickness and number of the measurement plate 45 are as follows: When the brake motor is stopped, the distance between the measurement plate 45 and the measurement plate 45 and the measurement surface 43 are as follows:
47 is selected so that it has a predetermined dimension, that is, a set value, which is wider than the initial value of the magnetic distance 48 between the magnetic pole body 24 and the magnetic ring portion 25a of the brake actuating body 25.

For example, the initial value of the magnetic gap 48 is 0.5 mm,
If the set value of the measurement distance 〓47 is 1.0 mm,
Measurement plate 4 with thickness between 0.1mm, 0.3mm and 0.5mm
5 is prepared, and the magnetic gap 48 between the magnetic pole body 24 and the magnetic ring portion 25a of the brake actuator 25 is set to 0.5 mm.
After inserting the adjustment seat 50 on the front bearing 49 side so that the distance is 2.0 mm, the axial distance φ between the distance measurement surface 43 and the end face of the distance measurement base plate 42 facing it is measured. If the distance φ is 2.0 mm, two 0.5 mm distance measurement plates 45 are used. If the distance φ is 1.8 mm, two 0.5 mm distance measurement plates 45 are used.
For each of the 0.3 mm interval measurement plates 45, and for each of the 2.1 mm interval measurement plates 45, 2 for the 0.5 mm interval measurement plates 45 are used.
1 and 0.1 mm, one each of the measurement plates 45 is selected, and the measurement surface 43 of the measurement board 42 is
When the brake motor is stopped, the measurement distance 47 can be set to 1.0 mm by attaching the brake

In addition, between the measurement surface 43 and the measurement plate 45
The space to be measured (47) of the stator frame 21 is such that a gauge can be inserted into the space to be measured (47) from the outside.
A viewing window 51 is provided on the radial extension of.

Next, the operation of the embodiment configured as above will be explained.

When the brake motor is energized, a stator field magnetic flux is generated, and the majority of this stator field magnetic flux passes through the rotor core 23 to generate driving torque, and is transmitted through the magnetic pole body 24 to the magnetic field of the brake actuating body 25. Ring part 2
The remaining stator field magnetic flux passing through 5a generates a magnetic attraction force between the magnetic pole body 24 and the magnetic ring portion 25a, and moves the brake operating body 25 in the axial direction against the action of the spring 39. The brake is released.

Subsequently, when the power is turned off, the stator field magnetic flux disappears, the driving torque and the magnetic attraction force disappear, and the brake actuating body 25 moves in the axial direction by the action of the spring 39, and the stop brake plates 30, 35 Rotating brake plates 34, 38 are connected to brake linings 28, 32, 3
3, 36, and 37 against the stop brake plate 27a of the bracket 27, the brake is actuated.

The operation of the brake motor is stopped as described above, but if the brake linings 28, 32, 33, 36, and 37 are worn out due to the repetition, the axial position of the brake actuating body 25 when the brake motor is stopped increases. moves toward the brake side, and the magnetic gap between the magnetic pole body 24 and the magnetic ring portion 25a of the brake actuating body 25 is 48 and the measurement plate 45 is moved to the brake side.
and the brake actuating body 25 〓The measured space between the measuring surface 43〓 47 is the brake lining 28,
The amount of wear at 32, 33, 36, and 37 is increased.

Therefore, if the initial value of the magnetic gap 48 and the set value of the measured gap 47 are known, the sight gauge is inserted from the viewing window 51 into the measured gap 47 and the measured gap 47 is set. By measuring the dimensions, the magnetic field 48 can be measured indirectly.

Also, when the distance to be measured 47 is the sum of the set value and the thickness of the distance adjusting plate 41, the magnetic distance 47
8 is the sum of the initial value and the thickness of the adjustment plate 41, so periodically check the distance to be measured with a gauge.
is measured, and when the value is greater than or equal to the sum of the set value of the distance to be measured 47 and the thickness of the distance adjustment plate 41,
By loosening the bolts 40 that fasten the stator frame 21 and the bracket 27 a little, removing one set of gap adjustment plates 41, and re-fastening the bolts 40, the magnetic gap 48 can be set to the initial value or a little more than this. It can be adjusted to a large value, and if a plurality of sets of interval adjustment plates 41 are inserted, readjustment can be performed as many times as the number of sets.

For example, as mentioned above, the initial value of the magnetic field 48 is
When the set value of the distance to be measured 47 is 1.0 mm at 0.5 mm, and the thickness of the distance adjusting plate 41 is 1.0 mm,
Brake lining 28, 32, 33, 36, 3
7 wears a total of 1.0 mm and when the measured distance 47 when the brake motor is stopped reaches 2.0 mm, which is the sum of this set value and the thickness of the distance adjustment plate 41, the magnetic distance 48 becomes 1.5 mm. However, if the gap adjustment plate 41 is removed at this time, the magnetic gap 48 will be 0.5 mm.
can be adjusted to its initial value, and the measured interval 〓47 is again
1.0mm, or when the distance to be measured 47 becomes 2.2mm due to further wear, the distance adjustment plate 4
By removing 1, the magnetic distance 48 can be adjusted to 0.7 mm, which is slightly larger than the initial value, and the measured distance 47
is 1.2mm.

By the way, the measuring plate 45 may be in the form of a thin ring or the like in addition to the thin rectangular shape of the above embodiment.

Further, in the embodiment, the brake actuating body 2
However, as shown in FIG. For example, the side surface of the rotary brake plate portion 25b of the brake operating body 25 on the side of the magnetic ring portion 25a serves as the measurement surface 43, and there is no need to form a step on the outer diameter portion of the rotary brake plate portion 25b. The measurement board 42 may be formed in an annular shape, or may be formed partially or in a strip shape, with only the portion corresponding to the measurement plate 45 protruding from the stator frame 21.

However, in both cases, a narrow radial gap 44 cannot be formed between the rotary brake plate portion 25b and the measurement board 42 as in the previous embodiment, and wear particles of the brake linings 28, 32, 33, 36, and 37 cannot be formed. Since it is easy to invade the motor side, it is desirable to adopt the configuration of the above practical example.

The embodiments in which the present invention is applied to a multi-plate brake type brake motor have been described above, but it can of course also be applied to a single-plate brake type brake motor. 48
In addition to a brake motor having means for adjusting the
Although not shown, the magnetic field is continuously closed by screw action.
It is also applicable to brake motors having means for adjusting 48.

(Effect of the invention) According to the measurement mechanism of the brake motor of the present invention, the measurement surface 43 is formed on the side surface of the magnetic ring portion 25a of the rotating brake plate portion 25b of the brake operating body 25.
or while facing its extended surface = measurement board 42
is provided on the stator frame 21, and between the measuring plate 45 and the
Select the thickness and number of measurement plates 45 so that the distance to be measured between the measurement surfaces 43 47 becomes the set value, and attach the measurement plate 45 to the measurement board 42, and connect the distance between the measurement surfaces 47 from the outside. With the simple structure of simply providing a viewing window 51 in the stator frame 21 into which a viewing gauge can be inserted, if the viewing gauge is inserted from the outside when the brake motor is stopped and the distance to be measured 47 is measured, the magnetic pole body 24 and the brake The magnetic gap between the operating body 25 and the magnetic ring portion 25a is 4
8 can be measured indirectly, and when the gap adjustment plate 41 is used as a means for adjusting the magnetic gap 48, the time to remove it can be easily determined without disassembling the brake part. It is highly practical.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view showing an embodiment of the measuring mechanism of the brake motor of the present invention; Fig. 2 is a partial cross-sectional perspective view of the measuring mechanism of the same embodiment;
Figure 4 is a partial cross-sectional view showing another embodiment of the present invention.
The figure is a longitudinal sectional front view of a conventional brake motor using an axial air type motor, and Figure 5 is a partial sectional view of a conventional brake motor consisting of a radial air type motor and an axial air type electromagnetic brake. be. 21...Stator frame, 22...Stator core, 23
... Rotor core, 24 ... Magnetic pole body, 25 ... Brake actuating body, 25a ... Magnetic ring part, 25b ... Rotating brake plate part, 39 ... Spring, 41 ... Between
Adjustment plate, 42...Measurement board, 43...Measurement surface, 45...Measurement plate, 47...Measurement space, 48...Magnetic space, 51...Peep window.

Claims (1)

[Claims for Utility Model Registration] A rotor core and a magnetic pole body are disposed within the magnetic field of the stator core, a brake actuating body having a magnetic ring portion facing the magnetic pole body in the axial direction is provided, and the magnetic pole body In the brake motor, the brake actuating body is moved in an axial direction against the action of a spring to release the brake by a magnetic attraction force generated by a stator field magnetic flux passing through the magnetic ring portion. , forming a measurement surface on the side surface of the magnetic ring of the rotary brake plate provided on the opposite side of the magnetic ring of the brake actuating body, and forming a measurement surface facing the measurement surface or its extension surface; A measurement board is installed on the stator frame to which the stator core is fixed, and when the brake motor is stopped, the distance between the measurement surface and the thin wall and the measurement plate is the distance between the magnetic pole body and the magnetic field. The thickness and the number of plates are selected so that the magnetic distance between the ring part and the ring part is set to a wider value than the initial value.A measurement plate is attached to the measurement surface side of the measurement board. A measuring mechanism for a brake motor, characterized in that the stator frame is provided with a viewing window through which a sight gauge can be inserted from the outside between the measuring surface and the measuring plate.