JP7160392B2 - braking device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braking device, and more particularly to a braking device for holding a device having a rotating shaft such as a machine tool, a robot, or an electric motor.

Conventionally, as a braking device of this type, as shown in FIG. By maintaining the stopped state and energizing the electromagnetic coil 62 to attract the movable iron core 64, the disc 65 is released and the output shaft 67A of the electric motor 67 rotates.

The braking force (clamping force) of the disk 65 is generated by the spline mechanism portion S _P in which the center hole 65A of the disk 65 and the outer peripheral surface of the cylindrical body (spline hub) 68 fixed to the motor output shaft 67A mesh with each other. (see Patent Document 1).
In this spline mechanism portion S _P , the disk 65 moves in the axial direction each time the brake is opened and closed, causing wear over time and smooth movement in some cases. There is a risk that the powder will fall directly on the spline mechanism S _P and adhere to it, hindering its movement.

In addition, in the braking device with the above configuration (Fig. 10), since the attractive force of the electromagnetic coil becomes the braking force, an electromagnetic coil corresponding to the magnitude of the braking force is required. increased, which was a factor in lowering productivity.
Therefore, as shown in FIGS. 11 and 12, a braking (clamping) device having a plurality of actuators 71, 71 has also been proposed (see Patent Document 2).

JP 2016-56925 A JP 2007-246187 A

In the conventional braking device (see Patent Document 2 and FIGS. 11 and 12), in order to install a plurality of actuators 71, 71, the actuators protrude radially outward, and the mounting bracket 70 is particularly required. board.
Therefore, it has been found that the overall size of the braking device is increased, the cost is increased, and the improvement in performance is hardly improved.

Accordingly, in the present invention, a disk-shaped disk is fixed to the rotating shaft of a rotating device in which the rotating shaft rotatably protrudes from the outer end surface of a stationary casing having a substantially circular outer peripheral surface; A plurality of actuators are arranged along the axis; the plurality of actuators are arranged in a radially inward direction area inside the substantially circular outer peripheral edge of the fixed casing when viewed from the axial direction of the rotating shaft, each actuator is held by a fixing pin projecting from the outer end surface of the fixed casing; and the actuator has an oval shape when viewed from the axial direction of the rotating shaft. It has a cocoon-shaped fixed core and a movable core with both long sides formed concavely, and two electromagnetic coils separated in the circumferential direction are electrically connected in series by connection wiring, and the cocoon-shaped movable core A pad is arranged at the center position of the iron core.

In addition, a disk-shaped disk is fixed to the rotating shaft of a rotating device in which the rotating shaft rotatably protrudes from the outer end surface of a fixed casing having a substantially circular outer peripheral surface; a plurality of actuators are arranged; the plurality of actuators are arranged in a radially inward direction area inside a substantially circular outer peripheral edge of the stationary casing when viewed from the axial direction of the rotating shaft; Further, a mounting plate is provided which is attached to the outer end surface of the fixed casing with a fastener, and a plurality of fixing pins are provided on the mounting plate so as to protrude in the axial direction to fix the actuators. Configured to be held by pins.

Further, the fixing pin is fixed to and detachable from the outer end face; and the number of the actuators arranged can be increased or decreased.
Further, the fixing pin is fixed to and detachable from the mounting plate; and the number of the actuators arranged can be increased or decreased.
The actuator has a cocoon-shaped fixed iron core and a movable iron core with both long sides of an elliptical shape formed concavely when viewed from the axial direction of the rotating shaft, and two electromagnetic coils separated in the circumferential direction. The coils are electrically connected in series by connecting wires, and a pad is provided at the center of the cocoon-shaped movable iron core.

According to the invention, when installing the braking device, it can be easily installed (without the use of brackets). Also, the installation space is small. That is, the rotating device such as an electric motor (to which the braking device is attached) can be installed without (almost) protruding radially outward from the outer peripheral edge of the substantially circular shape viewed from the direction of the rotation axis. It is possible to save the space of the place (place).

It is a front view showing one embodiment of the present invention. It is a side view. It is a principal part side view shown with a partial cross section. FIG. 5 is a side view of another embodiment of the invention, shown during assembly, and with a mounting plate; 5 is an enlarged view of a main portion of FIG. 4; FIG. Front view for explanation showing that the number of actuators arranged can be increased or decreased, for example, 6 as in (A), 4 as in (B), and 3 as in (C). It is a diagram. FIG. 4 is a front view of another embodiment of the present invention; 8 is an enlarged cross-sectional view taken along line VIII-VIII of FIG. 7; FIG. 8 is an enlarged cross-sectional view taken along line IX-IX of FIG. 7; FIG. It is a figure which shows a prior art example, Comprising: (A) is a principal part cross-sectional side view, (B) is a principal part enlarged view of (A). FIG. 11 is a side view showing another conventional example; FIG. 12 is a front view of the conventional example (FIG. 11);

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below based on the illustrated embodiments.
Referring to one embodiment of the invention shown in FIGS. 1-3, M designates a rotating device such as an electric motor having a stationary casing 10 and a rotating shaft 11. FIG. The fixed casing 10 has a substantially circular outer peripheral surface 12 and substantially disk-shaped outer end surfaces 13 and 14 .

The rotating shaft 11 protrudes from the center of one outer end surface 13 . A disc-shaped disk 5 is fixed to the rotatable rotary shaft 11 .
As the rotating device M, an electric motor (electric motor) is generally used, but a pneumatic motor or a hydraulic motor may be freely used as a rotational drive source, and various reduction gears may also be used. .

Along the outer peripheral edge 5A of the disk 5, a plurality of actuators 20--six in FIG.
When viewed from the direction along the axis L11 of the rotating shaft ₁₁ of the rotating device M---the axial direction _Y11 ---, the plurality of actuators 20, as shown in FIG. It is disposed in a radially inward direction area inside the substantially circular outer peripheral edge _C10 .

1 to 3, ΔR is a (circular) envelope C ₂₀ that envelops the remotest parts of the plurality of actuators 20 centering on the axis L ₁₁ of the rotating shaft 11, and It shows the radial difference from the substantially circular outer peripheral edge _C10 . Each actuator 20 is held by a fixing pin 15 fixed to an axial outer end surface 13 of the fixed casing 10 and projecting from the outer end surface 13 . That is, the conventional large bracket 70 (see FIGS. 11 and 12) is omitted.

The fixing pin 15 has, for example, a bolt shape having a male screw, and the male screw is detachably screwed into a screw hole 16 recessed in the outer end surface 13 of the fixed casing 10 (of the rotating device M). Then, it is (removably) fixed to the outer end surface 13 of the stationary casing 10 .

As described above, the fixing pin 15 is fixed to the outer end surface 13 of the fixed casing 10 so as to be freely fixed and detachable, thereby reducing the number of actuators 20 (six in FIG. 1). is possible.

FIG. 6A is the same view as FIG. 1 and shows a state in which six actuators 20 are arranged in the circumferential direction. This can be freely reduced to four actuators 20 as shown in FIG. 6(B) and further to three actuators 20 as shown in FIG. 6(C).

As shown in FIGS. 6A, 6B, and 6C, the number of actuators 20 to be installed can be increased or decreased according to the requirements (braking performance) and conditions of the installation site. I understand. In particular, there is an advantage that the braking force can be changed stepwise and common basic members (parts) can be used interchangeably regardless of the magnitude of the braking force.

4 and 5 show another embodiment of the invention. 1 to 3, a mounting plate 25 is provided.
4 and 5, similarly to FIGS. 1 to 3, a rotating shaft 11 is rotatably projected from an outer end surface 13 of a stationary casing 10 having a substantially circular outer peripheral surface 12. A disk-shaped disk 5 is fixed to the rotating shaft 11 of the rotating device M, and a plurality of actuators 20 are arranged along the outer peripheral edge 5A of the disk 5. When viewed from the axial direction Y11 of the rotating shaft ₁₁ , it is arranged in a radially inward direction area inside the substantially circular outer peripheral edge C10 of the fixed casing _10. As shown in FIG.

A mounting plate 25 is detachably fixed to the outer end surface 13 of the fixed casing 10 by means of fasteners (bolts) 21 .
The mounting plate 25 has a plurality of fixing pins 15 projecting in the axial direction. Each actuator 20 is held by this fixed pin 15 .

Thus, in another embodiment shown in FIGS. 4 and 5, a plurality of actuators ₂₀ are first attached to a mounting plate 25 to form a unit U ₂₀ which is secured by bolts or the like. It is detachably attached to the outer end face 13 of the fixed casing 10 by means of the tool 21 .

The fixing pin 15 is fixed to the mounting plate 25 so as to be fixed and detachable. Therefore, the number of actuators 20 attached to the mounting plate 25 as the unit U ₂₀ can be increased or decreased.

1 to 3 and 6, the number of attached actuators 20 can be increased or decreased in the embodiments of FIGS. 4 and 5 as well. Furthermore, in FIGS. 4 and 5, the structure of the unit U ₂₀ , which is lightweight and easy to handle, allows the work of removing and attaching the actuator 20, so that the work can be carried out easily and quickly. Furthermore, if a set of units U ₂₀ , . In FIG. 4, the arrow FU indicates the direction in which the unit _{U 20} approaches the stationary casing 10 of the rotating device M for attachment.

2 and 3, and the other embodiments of FIGS. and a gap that is approximately half the amount of movement of the movable core 2 from the disk 5 is set between the pads 6A and 6B. With such a configuration, a gap can be reliably formed between the disk 5 and the pads 6A and 6B, and safety and reliability are high.

Next, FIGS. 7, 8, and 9 show another embodiment of the present invention, and FIG. 7 is a diagram to be compared with FIG. 8 and 9 are (VIII-VIII) cross section and (IX-IX) cross section of FIG. 7, respectively, and the disc-shaped disk is omitted.

As shown in FIG. 7, the actuator 20 includes a cocoon-shaped fixed iron core 1 and a movable iron core 2 having both long sides of an elliptical shape concave when viewed from the axial direction of the axis L11 of the rotating shaft ₁₁ . , has. That is, although only the fixed core 1 is visible in FIG. 7, the outline shape of the movable core 2 is the same.

Each actuator 20 also has two circular electromagnetic coils 3, 3 separated in the circumferential direction. Moreover, the two electromagnetic coils 3, 3 are electrically connected in series by a connection wiring 33 (indicated by broken lines in FIGS. 7 and 8).
A pad 6A is arranged at the center position of the cocoon-shaped movable core 2 (as seen from the axial direction of the rotating shaft 11). Further, the caliper 7 is provided with a pad 6B having the same shape as the pad 6A so as to face the pad 6A.

8 and 9, the actuator 20 is attached to the mounting plate 25 with the fixing pin ₁₅ to assemble the unit U20. Thereafter, (similarly to FIG. 4), the mounting plate 25 is brought into contact with the outer end surface 13 of the fixed casing 10 of the rotating device M and fixed with fasteners (bolts) 21 (see FIG. 7).

At this time, as shown in FIG. 7, the actuator 20 has a cocoon shape in which both long sides of an elliptical shape are formed into concave shapes. can be arranged, and the unit U ₂₀ can be fixed to the outer end surface 13 of the rotating device M with this fixture 21 .
That is, not only the plurality of (three) actuators 20, 20, 20 but also the fasteners 21, 21, 21 are arranged in the radially inward direction area inside the substantially circular outer peripheral edge C10 of the stationary casing ₁₀ . , are arranged.

By the way, in the embodiments of FIGS. 8 and 9, each actuator 20 is a floating type that is slidable with respect to the fixed pin (fastening pin) 15, and the movable core 2 is moved from the disk 5. A gap of about half the amount is configured to be set between both pads 6A and 6B. With such a configuration, a gap can be reliably formed between the disk 5 and the pads 6A and 6B, and safety and reliability are high.

As shown in FIGS. 11 and 12 of the conventional example, the actuator 71 can be moved to an imaginary circle C ₁₂₄ having a diameter 24% larger than the diameter D ₆₀ of the circular outer peripheral edge of the fixed casing 60 of the conventional rotating device 59. Alternatively, the bracket 70 protrudes. Furthermore, in the prior art document 2, the brake (actuator) or bracket protrudes into an imaginary circle with a diameter that is 33% larger than the diameter of the circular outer peripheral edge of the stationary casing.

In defining the "radial inward direction area inside the substantially circular outer peripheral edge C10 of the fixed casing ₁₀ " in the present invention, the above-mentioned conventional "24%" and "33%" should be considered. In the present invention, assuming that the diameter of the substantially circular outer peripheral edge C10 of the fixed casing ₁₀ is 100, the "radial inner direction area" is defined as being within 110% of the diameter.

As described in detail above, the present invention provides a rotating device M in which the rotating shaft 11 is rotatably projected from the outer end surface 13 of the stationary casing 10 having the substantially circular outer peripheral surface 12. A disk 5 is fixed; a plurality of actuators ₂₀ are arranged along the outer peripheral edge 5A of the disk 5; Each actuator 20 is disposed in a radially inward direction area inside the substantially circular outer peripheral edge C10 of the stationary casing ₁₀ ; Since it is held by , it is possible to achieve compactness without increasing the outer diameter, and it is possible to simply attach it with the fixing pin 15 without requiring a bracket. In particular, the plurality of actuators 20 hardly protrude from the substantially circular outer peripheral surface 12 of the rotating device M, so that a sufficiently large braking function can be exhibited while being compact. That is, the braking performance can be improved without increasing the size. Moreover, simplification of the structure and cost reduction can be realized. Moreover, since the braking force can be increased without increasing the space for installing the braking device, there is also the advantage of saving space. Furthermore, the overall braking force can be changed stepwise by increasing or decreasing the actuator 20. FIG.

Further, according to the present invention, a disk-shaped disk 5 is fixed to the rotating shaft 11 in a rotating device M in which the rotating shaft 11 is rotatably projected from the outer end surface 13 of a fixed casing 10 having a substantially circular outer peripheral surface 12. A plurality of actuators ₂₀ are arranged along the outer peripheral edge 5A of the disk 5; A mounting plate 25 is disposed in a radially inward direction area inside the circular outer peripheral edge C ₁₀ ; A plurality of fixing pins 15 are protruded from the mounting plate 25 in the axial direction, and the actuators 20 are held by the fixing pins 15. Therefore, the outer diameter is not increased, and compactness is achieved. In addition, it can be easily attached by fixing pins 15 without requiring a bracket. In particular, the plurality of actuators 20 hardly protrude from the substantially circular outer peripheral surface 12 of the rotating device M, so that a sufficiently large braking function can be exhibited while being compact. That is, the braking performance can be improved without increasing the size. Moreover, simplification of the structure and cost reduction can be achieved. Moreover, since the braking force can be increased without increasing the space for installing the braking device, there is also the advantage of saving space. Furthermore, the overall braking force can be changed stepwise by increasing or decreasing the actuator 20. FIG.
Furthermore, a plurality of actuators 20 are assembled to the mounting plate 25 to prepare the unit _{U 20} in advance, and then it can be easily and quickly attached to the outer end surface 13 of the rotating device M from the direction of the arrow FU in FIG. can wear In other words, the final attachment work can be efficiently performed by the pre-assembly method.

Further, according to the present invention, the fixing pin 15 is fixed to and detachable from the outer end face 13; 70 (see Fig. 12) is not required, and it is possible to achieve compactness, simplification of structure, and cost reduction. Moreover, the magnitude of the braking torque can be set step by step with a simple operation (see FIG. 6).

In addition, the fixing pin 15 is fixed to and detachable from the mounting plate 25; ), it is possible to achieve compactness, simplification of structure, and cost reduction. Moreover, the magnitude of the braking torque can be set step by step with a simple operation (see FIG. 6). In particular, a plurality of actuators 20 with different numbers are prepared in advance (assorted), for example, as shown in FIGS. It is possible to respond quickly and easily to different installation locations (sites).

The actuator 20 has a cocoon-shaped fixed iron core 1 and a movable iron core 2 formed in a concave shape on both long sides of an oval when viewed from the axial direction of the rotary shaft 11, and is separated in the circumferential direction. The two electromagnetic coils 3, 3 are electrically connected in series by the connection wiring 33, and the pad 6A is arranged at the center position of the cocoon-shaped movable iron core 2, so that the overall structure is simplified. , the number of mounting and adjusting points can be reduced, and the workability of assembly can be improved. Of course, it can be easily arranged in the radially inward direction area from the outer peripheral edge C10 of the fixed casing ₁₀ of the rotating device M.

REFERENCE SIGNS LIST 1 fixed core 2 movable core 3 electromagnetic coil 5 disk-shaped disk 5A outer peripheral edge 6A pad
10 fixed casing
11 Axis of rotation
12 Roughly circular outer peripheral surface
13 Outer end face
15 Fixing pin
20 Actuator
21 Fixture
25 Mounting plate
33 Connection wiring C ₁₀ Outer edge M Rotating device Y ₁₁ Axial direction

Claims (5)

A rotary shaft (11) in a rotary device (M) in which a rotary shaft (11) rotatably protrudes from an outer end surface (13) of a stationary casing (10) having a substantially circular outer peripheral surface (12) is provided with a disk A shaped disk (5) is fixed,
A plurality of actuators (20) are arranged along the outer peripheral edge (5A) of the disk (5),
The plurality of actuators (20) are arranged radially inside the substantially circular outer edge (C10) of the fixed casing ( ₁₀ ) when viewed from the axial direction (Y11) of the rotating shaft ( ₁₁ ). disposed in the direction area,
Moreover, each actuator (20) is held by a fixing pin (15) projecting from the outer end surface (13) of the fixed casing (10) ,
The actuator (20) has a cocoon-shaped fixed iron core (1) and a movable iron core (2) having both long sides of an elliptical shape concave when viewed from the axial direction of the rotating shaft (11). , two electromagnetic coils (3) (3) separated in the circumferential direction are electrically connected in series by a connection wiring (33), and a pad (6A ) is provided
A braking device characterized by: A rotary shaft (11) in a rotary device (M) in which a rotary shaft (11) rotatably protrudes from an outer end surface (13) of a stationary casing (10) having a substantially circular outer peripheral surface (12) is provided with a disk A shaped disk (5) is fixed,
A plurality of actuators (20) are arranged along the outer peripheral edge (5A) of the disk (5),
The plurality of actuators (20) are arranged radially inside the substantially circular outer edge (C10) of the fixed casing ( ₁₀ ) when viewed from the axial direction (Y11) of the rotating shaft ( ₁₁ ). disposed in the direction area,
Further, a mounting plate (25) is attached to the outer end surface (13) of the fixed casing (10) with a fastener (21), and a plurality of fixing pins are provided on the mounting plate (25). (15) projecting in the axial direction, and each actuator (20) is held by the fixing pin (15). The fixing pin (15) is fixed to and detachable from the outer end surface (13),
2. A braking system according to claim 1, wherein the number of said actuators (20) provided can be increased or decreased. The fixing pin (15) is fixed to and detachable from the mounting plate (25),
3. The braking device according to claim 2, wherein the number of actuators (20) provided can be increased or decreased. The actuator (20) has a cocoon-shaped fixed iron core (1) and a movable iron core (2) having both long sides of an elliptical shape concave when viewed from the axial direction of the rotating shaft (11). , two electromagnetic coils (3) (3) separated in the circumferential direction are electrically connected in series by a connection wiring (33), and a pad (6A 3. A braking system according to claim 2 , wherein .

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