JPH026075Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to electrical chain blocks.

[Conventional technology and its problems]

In conventional electric chain blocks, an insertion hole in the direction of the motor axis for passing the lead wire of the electromagnetic brake is integrally formed in the peripheral wall of a motor case made of cast metal or the like that houses the drive motor. Therefore, the insertion hole requires machining, which is troublesome and costly.

[Means for solving problems]

The present invention combines a motor case with a built-in drive motor, a shield board attached to one end of the motor case and equipped with an electromagnetic brake, into a common threaded fastener on one side of the main body cover. A protective pipe through which the electromagnetic brake lead wire is inserted is arranged along the outer circumferential surface of the motor case in the direction of the motor axis, and the openings at both ends of the protective pipe are connected and fixed inside the main body cover and inside the main body cover. It is connected to the lead wire hole of the shield panel,
Further, both ends of the protective pipe are held against the main body cover and the shield board by the axial tightening force of the fastener.

[Effect]

By tightening the through-fasteners, the motor case and the shield board can be attached to the main body cover, and at the same time, the protective pipe can be supported by the main body cover and the shield board. Since the electromagnetic brake lead wire is inserted through the protective pipe provided separately from the motor case, there is no need to form an insertion hole for the lead wire in a part of the motor case by machining or the like.

〔Example〕

Embodiments of the present invention will be explained in detail based on the drawings.

In FIGS. 1 and 2, a chain 2 with a hook 1 attached to its lower end is wound around a chain wheel 4 provided within a main body cover 3. The main body cover 3
, a pair of side plates 5, 5 held in parallel at a constant interval, and a connecting member 8 provided between the side plates 5, 5 and having a main hook 7 for suspending the entire body on the upper end surface 6. It is equipped with. 9 is the chain wheel 4 mentioned above
A transmission shaft 1 for driving a chain wheel, which is a drive motor for
0, a rotor 12 fixed to the rotor 11, and a stator 13 provided close to the rotor 12. A mechanical brake 14 is provided on one of the side plates 5, 5.
A storage box 15 is provided inside, and an operation box 16 is attached to each of the storage boxes 15.

Therefore, on one side 17 of the main body cover 3, a motor case 18 containing a drive motor 9 is provided.
and a shield board 21, which is attached to one end 19 of the motor case 18 and has an electromagnetic brake 20 attached thereto, are connected and fixed by a common through-fastener 22. Specifically, an interposed member 23 is fixed to the one side surface 17 of the main body cover 3 with bolts or the like, and the other end 24 of the substantially cylindrical motor case 18 is in contact with the interposed member 23, and A male threaded portion 26 at the tip of the fastener 22 is screwed into a female threaded portion 25 provided on the surface of the intervening member 23. The shield board 21 is
It has a boss portion 27 that supports one end of the rotating shaft 11, and also has a space portion 29 formed by the boss portion 27 and the outer circumferential wall portion 28 and containing the electromagnetic brake 20 therein. Boss portion 27 and the outer peripheral wall portion 2
A radial wall portion 30 that connects the motor case 8 is fitted into an inner circumferential surface 31 of one end portion 19 of the motor case 18 .
As shown in FIG. 4, through holes 32 through which the fasteners 22 are inserted are formed at appropriate pitches in the circumferential direction on the outer peripheral side of the radial wall portion 30. The fasteners 22 pass through insertion grooves 33 formed on the outer peripheral surface of the stator 13 at positions in the circumferential direction corresponding to the through holes 32. The protective pipe 35 through which the electromagnetic brake lead wires 34 are inserted is connected to the outer peripheral surface 40 of the motor case 18.
is arranged along the motor axis. The openings 36 and 36 at both ends of the protective pipe 35 communicate with the inside of the main body cover 3 and the lead wire extraction hole 37 of the shield panel 21.
Both end portions 38 and 39 of 5 are held against the main body cover 3 and shield board 21 by the axial direction tightening force of through-fasteners 22. Specifically, one end 38 of the protection pipe 35 is loosely fitted into the hole 41 of the intervening member 23. 42 is a sealing member such as a gasket held between one side 17 of the main body cover 3 and the intervening member 23. The lead wire extraction hole 37 is formed in a connecting protrusion 43 protruding from the outer peripheral surface of the shield board 21, and a shield member 44 such as a rubber packing is fitted into the extraction hole 37. Therefore, both ends 38, 39 of the protection pipe 35 come into contact with the seal members 42, 44 due to the tightening force of the fasteners 22, and are sealed.
Both ends of the motor case 18 are fitted onto the circumferential steps 45 and 46 of the intervening member 23 and the radial wall 30, and the outer circumferential surface of the protective pipe 35 is in contact with the outer circumferential surface 40 of the motor case 18. It is considered tangential. In addition, in the illustrated example, the protective pipe 35 is connected to the motor case 1.
8 is shown, but it may be provided on the front side or the back side. The electromagnetic brake lead wire 34 is connected to a terminal block (not shown) inside the main body cover 3, and is connected there to a lead wire 47 from the operation box 16.

A lid 4 is attached to the end of the shield panel 21 on the side opposite to the motor.
8 is attached with screws etc. One side 1 of the main body cover 3 below the motor case 18
7 is provided with a limit switch 49,
50 is its protective cover.

Next, to explain how to assemble the motor case 18 and the protective pipe 35, as shown in FIG.
are held between the main body cover 3 and the shield board 21, and the through fasteners 22 are tightened to fasten them to the main body cover 3. After this, the lid 48 is attached.

In the above embodiment, a case is shown in which the end of the motor case 18 is attached to the main body cover 3 with the end part in contact with the intervening member 23, but of course it may be attached directly to one side 17 of the main body cover 3. Good too.

[Effect of idea]

The present invention has the following remarkable practical effects due to the above-mentioned configuration.

Simply tighten the through-fasteners 22... to attach the motor case 18 and shield panel 21 to the main body cover 3.
Can be installed on the protection pipe 3 at the same time
5 can be arranged along the outer circumferential surface 40 of the motor case 18 in the direction of the motor axis.

Since the motor case 18, shield panel 21, and protection pipe 35 can be attached only by tightening the through-fasteners 22, the assembly becomes easy and quick.

Since the protective pipe 35 is made separate from the motor case 18, there is no need to machine a lead wire insertion hole in a part of the motor case made of cast metal, etc., as in the conventional case. Because a circular pipe can be used,
Manufacturing is easy and costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional front view showing an embodiment of the present invention;
FIG. 2 is an enlarged sectional view showing how the protective pipe is attached, FIG. 3 is a perspective view showing the method of assembly, and FIG. 4 is an enlarged half-sectional view of the shield panel. 3...Body cover, 9...Motor, 17...One side, 18...Motor case, 20...Electromagnetic brake, 21...Shield board, 22...Threading fastener, 34...Lead wire, 35 ...protective pipe, 3
6...Opening, 37...Lead wire extraction hole, 38...
... end, 39 ... end, 40 ... outer peripheral surface.

Claims (1)

[Scope of utility model registration request] Motor case 18 with built-in drive motor 9
and a shield board 21 attached to one end 19 of the motor case 18 and provided with an electromagnetic brake 20 are connected and fixed to one side 17 of the main body cover 3 with a common through fastener 22, A protective pipe 35 through which the electromagnetic brake lead wires 34 are inserted is arranged in the motor axis direction along the outer peripheral surface 40 of the motor case 18, and the openings 36 at both ends of the protective pipe 35 are inserted into the main body. The protective pipe 35 communicates with the inside of the cover 3 and the lead wire extraction hole 37 of the shield panel 21.
An electric chain block characterized in that both ends 38 and 39 of the chain block are held against the main body cover 3 and the shield board 21 by the axial tightening force of the fasteners 22.