JP4742310B2 - Non-excitation actuated rotating electric machine with electromagnetic brake - Google Patents

Description

The present invention relates to a non-excited operation type electromagnetic brake-equipped rotating electrical machine including an electromagnetic brake that operates in a non-excited state.

  Conventionally, as a non-excited actuating electromagnetic brake rotating electrical machine with a manual opening structure, it has been provided with a brake disk that cannot be rotated within the fixed frame and is movable in the axial direction. There is a configuration to make it. And, by sandwiching the brake disk between the two rotating plates, the rotating shaft is prevented from moving in the rotating direction, and one rotating plate is braked by magnetic attraction as soon as the winding of the rotating electrical machine is excited. Non-excitation actuated electromagnetic brake provided on a frame that is moved in the axial direction against the spring, and the other rotating plate is configured to receive an action from a manual control mechanism via an appropriately arranged intermediate bearing An attached rotating electrical machine is disclosed (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 63-315792 (Means for Solving Problems, Drawing)

  In the above prior art, when the brake is released in a non-excited state such as during a power failure, the frame is pressed against the brake spring in the axial direction by pulling a manual control mechanism, and is provided on the frame. The brake plate is unlocked by pulling one of the rotating plates away from the brake disc, and it is necessary to always apply an external force to maintain the brake released state. Therefore, in the case of a structure in which the armature is pressed by a strong brake spring, there is a problem that the structure becomes large in order to perform the opening operation by human power.

  The present invention has been made for the purpose of solving the above-described problems of the prior art, and does not require a tool, and can easily release a brake without increasing the structure. The object is to provide a rotating electrical machine equipped with a brake.

A rotating electrical machine according to the present invention includes an electromagnetic brake that operates a brake in a non-excited state to restrain a rotating shaft that constitutes the rotating electrical machine main body and releases the brake by releasing the constraint to release the restraint of the rotating shaft. A non-excitation actuated rotating electric machine with an electromagnetic brake, a fixed core mounted on a non-load side of the rotating electric machine main body, an armature that is always pressed by a pressing means mounted on the fixed core, and the armature With a non-excited operation type electromagnetic brake having a brake portion configured to include a brake plate disposed opposite to each other, and a brake disk disposed between the armature and the brake plate and coupled to a rotating shaft of the rotating electrical machine In the rotating electrical machine, a brake cover that is mounted on the rotating electrical machine body and surrounds the brake portion with the rotating electrical machine body; A threaded portion that engages with the rake cover is formed at one end, an open rod having the same axial direction as the axial direction of the rotating shaft, and the other end of the open rod orthogonal to the axial direction of the open rod. It is mounted with a bearing between an opening lever that is mounted with an axial direction and moves the opening rod in the axial direction by a rotating operation, and the threaded portion of the opening rod and the mounting portion of the opening lever, An attachment member that moves in the axial direction of the release rod together with the release rod, and an release shaft that is attached to the attachment member and presses the armature to the fixed core at the tip to release the brake part. Is.

  According to the present invention, when the brake is released in the state where the non-excited operation type rotating electric machine with electromagnetic brake is not powered, the radial force of the release lever is amplified in the thrust direction so that the brake plate 5 and the brake disc 6 Since the contact is released, it is easy to release manually, and even when the electromagnetic brake is kept open, it can be kept open without applying radial holding force to the release lever. There is an effect that an easy non-excitation operation type rotating electric machine with electromagnetic brake can be obtained.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a non-excited operation type electromagnetic brake-equipped rotating electrical machine according to Embodiment 1 of the present invention, and FIG. 2 is a front view of the rotating electrical machine shown in FIG.

In these drawings, a fixed core 2 is attached to one end of the rotating shaft 1 on the side opposite to the load, and the rotating shaft 1 is rotatably supported by a bearing 3. The fixed core 2 is equipped with pressing means, for example, a brake spring (not shown), and an armature 4 that is always pressed by the brake spring is disposed on the end face on the opposite side of the fixed core 2.

A brake plate 5 is disposed between the armature 4 and a predetermined gap, and a brake disk 6 having both surfaces made of a friction body is disposed between the brake plate 5 and the armature 4. That is, the brake disc 6 is sandwiched between the armature 4 and the brake plate 5, the armature 4 and the brake plate 5 are attached to the fixed core 2, and the brake disc 6 is formed at the end of the rotating shaft 1. It is connected to the hub portion 7 to be connected.

The fixed core 2, the hub portion 7 of the rotating shaft 1, the armature 4, the brake plate 5, the brake disc 6, and the like constitute a brake portion 8, and this brake portion 8 is attached to the non-load side of the rotating electrical machine body 9 with a screw 10. The brake cover 11 is covered. As shown in FIG. 1, the brake cover 11 is provided with an open shaft 12 that penetrates the brake portion 8 from the outside, and its tip is configured to be movable in the axial direction until it contacts the armature 4.

The proximal end portion of the open shaft 12 is screwed to a mounting member 15 that is mounted on the open rod 13 with a bearing 14 interposed therebetween, and the open shaft 12, the open rod 13, the bearing 14, the mounting member 15, and the like. Thus, the brake release portion 16 is configured. The brake release portion 16 is covered with an open cover 17 so as to have a waterproof and dustproof structure with the brake cover 11 as shown in FIG.

A screw hole (not shown) is formed at one end of the open rod 13, and the shaft 18 is screwed into the screw hole. An opening lever 19 that rotates the shaft 18 is attached to the shaft 18 so that the axial direction thereof is orthogonal to the axial direction of the shaft 18, and the opening lever 19 is attached to the opening cover 17. Is held in place. The attachment plate 20 is attached to the open cover 17 by means of attachment screws 21.

Further, a screw portion 22 is formed at the other end portion of the release rod 13, and this screw portion 22 is screwed into a screw hole 23 formed at the center portion of the brake cover 11, and the other end of the release rod 13 is formed. Part is held. With this configuration, the radial force of the release lever 19 is converted into the thrust force of the release rod 13, and the tip of the release shaft 12 presses the armature 4 as a powerful force. That is, the radial force of the release lever 19 is amplified in the thrust direction to release the contact between the brake plate 5 and the brake disc 6.

The rotating electrical machine according to Embodiment 1 is configured as described above, and the operation thereof will be described next.
First, the case of manually releasing the brake will be described. In this case, the mounting screw 21 is loosened and the mounting plate 20 is removed. Thereafter, when the release lever 19 is rotated, for example, in the clockwise direction, the release rod 13 is screwed by the screw portion 21 formed at the other end of the release rod 13, and the attachment member 15 is moved to the right in FIG. Push into. As a result, the open shaft 12 fixed to the attachment member 15 presses the armature 4 against the fixed core 2 against the pressing force of a brake spring (not shown), and the brake disk 6 is in a free state. In this state, since the brake disc 6 is connected to the rotary shaft 1 by the hub 7, the rotary shaft 1 is opened.

  Next, the case where the manual release is released and the rotating shaft 1 is fixed will be described. In this case, when the release lever 19 is rotated counterclockwise, the release rod 13 returns to the position before manual release, but when the release rod 13 tries to return to the position before manual release, the release shaft 12 is returned. At the same time, the brake disc 6 is sandwiched between the armature 4 and the brake plate 11 by the brake spring built in the fixed core 2. Since the brake disc 6 is connected to the rotary shaft 1 by the hub 7, the rotary shaft 1 is fixed. At this time, since the release rod 13 is assembled to the brake cover 11 by the screw portion 22, a radial force for holding the release lever 19 is not required.

  Opening operation by interfering with the brake cover 11 by setting the screw length of the screw portion 22 formed on the other end of the release rod 13 to be equal to or greater than the dimension from the initial thickness of the brake disc 6 to the wear limit thickness. Can be prevented in advance.

  Further, even if the release rod 19 is continuously rotated counterclockwise by the release lever 19, the attachment member 15 coupled to the release cover 17 and the release rod 13 via the bearing 14 is connected to the threaded portion of the brake cover 11 and the release rod 13. Since it interferes in the state which 22 has engaged, it is preventing that a structure decomposes | disassembles inside a manual release apparatus.

The non-excitation actuated rotating electric machine with electromagnetic brake according to the present invention facilitates the manual opening operation when the brake is released in the absence of a power source, and has a force for maintaining the electromagnetic brake in the opened state. Even if it is not added, an open state can be maintained and a rotating electric machine with a non-excitation operation type electromagnetic brake that is easy to operate can be obtained.

It is sectional drawing of the rotary electric machine with a non-excitation actuated electromagnetic brake in Embodiment 1 of this invention. It is a front view of the rotary electric machine shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating shaft 2 Fixed core 3 Bearing 4 Armature 5 Brake plate 6 Brake disc 7 Hub part 8 Brake part 9 Rotating electrical machine main body 10 Screw 11 Brake cover 12 Release shaft 13 Release rod 14 Bearing 15 Mounting member 16 Brake release part 17 Release cover 18 Shaft 19 Release lever 20 Mounting plate 21 Mounting screw 22 Screw part 23 Screw hole

Claims (2)

Non-excitation actuated electromagnetic brake including an electromagnetic brake that operates the brake in a non-excited state to constrain the rotating shaft constituting the rotating electrical machine body and releases the brake by releasing the restraint. A rotating electric machine with
A fixed core mounted on the anti-load side of the rotating electrical machine body;
An armature that is constantly pressed by the pressing means mounted on the fixed core;
A brake plate disposed opposite to the armature,
A brake disc disposed between the armature and the brake plate and coupled to a rotating shaft of the rotating electrical machine;
In a rotating electrical machine with a non-excitation actuating electromagnetic brake having a brake portion configured to include:
A brake cover mounted on the rotating electrical machine body and surrounding the brake part with the rotating electrical machine body;
A threaded portion that is screwed into the brake cover is formed at one end, and an open rod having the same axial direction as the axial direction of the rotating shaft;
An opening lever that is attached to the other end of the opening rod with an axial direction orthogonal to the axial direction of the opening rod, and that moves the opening rod in the axial direction by a rotating operation;
An attachment member which is attached via a bearing between the threaded portion of the release rod and the attachment portion of the release lever, and moves in the axial direction of the release rod together with the release rod;
An open shaft that is mounted on the mounting member and presses the armature at the distal end against the fixed core to release the brake portion;
A rotating electrical machine with a non-excited operation type electromagnetic brake. 2. The non-excitation actuated electromagnetic brake according to claim 1, wherein a thread length of a thread portion formed at one end of the open rod is set to be not less than a dimension from an initial thickness of the brake disk to a use limit wear thickness. With rotating electric machine.

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