WO2008059657A1

WO2008059657A1 - Actuator structure by means of can electric motor

Info

Publication number: WO2008059657A1
Application number: PCT/JP2007/067930
Authority: WO
Inventors: Hironobu Ichimaru; Naofumi Yoshimi
Original assignee: Hirotek Inc.
Priority date: 2006-11-14
Filing date: 2007-09-14
Publication date: 2008-05-22
Also published as: JP2008125271A

Abstract

[PROBLEMS] To provide an actuator structure by means of a can electric motor, which enables to reduce the cost required for the replacement (or cleaning) of a rotor by allowing only the rotor to be removed from the inside of a motor case compared to the case where the complete can electrode motor set is replaced by new one, and which also enables to operate the removal of the rotor in a simple manner. [MEANS FOR SOLVING PROBLEMS] A rotor (3) and a stator coil (4) partitioned by a septum (5) are provided in the inside of a motor case (6). An actuator axis (2) which can be fixed in the rotating direction but can slide in the axis direction so as to be removed is connected to one end of the rotor. In the motor case, an opening (61) is formed on a surface opposing to other end of the rotor. The rotor can be pulled out from the inside of the motor case through the opening. In the pulling operation, the connection between the rotor and the actuator axis can be released by the sliding of the rotor in the axis direction.

Description

Specification

Drive structure with can type electric motor

Technical field

TECHNICAL FIELD [0001] The present invention relates to a drive structure using a can-type electric motor in which a partition between a rotor and a stator coil is defined by a partition wall, and in particular, a rotor capable of improving maintainability and downsizing in a fluid feeder. It is related with attachment and detachment technology.

Background art

[0002] A tire vulcanizer includes a bladder that expands and contracts by supplying and discharging heated fluid, and the raw tire is pressed by pressing the bladder expanded by supplying heated fluid against the inner surface of the raw tire set inside the mold. Is vulcanized.

In this case, the heated fluid is supplied to the bladder by a fluid feeder provided in the piping system, but a so-called can type electric motor is known as a drive motor of this fluid feeder. ! /, Ru (see Patent Document 1).

In this conventional can type electric motor, since the rotor and the stator coil are partitioned by a partition (can), the stator coil is isolated from the heating fluid, and troubles due to the influence of heat and steam are prevented. It can be avoided.

[0004] However, in such a can-type electric motor, the rotor is exposed to a high-temperature or high-humidity environment. And may adhere to the outer peripheral surface of the rotor and lock the rotation.

In such a case, conventionally, there is a problem that the force that replaces a set of can-type electric motors is disadvantageous in terms of cost.

[0005] In order to reduce the cost burden associated with the replacement of such a can-type electric motor, the rotor is taken out of the motor case and replaced (or cleaned) with a new rotor. You only need to replace the rotor, such as assembling it inside.

However, in the conventional can type electric motor, since the motor case is formed so as to enclose the rotor, only the rotor cannot be taken out from the inside of the motor case. It had a structure.

Patent Document 1: Japanese Unexamined Patent Publication No. 2006-22644

Disclosure of the invention

Problems to be solved by the invention

[0006] The present invention has been made to solve the above-described conventional problems. When the rotor is replaced (or cleaned), only the rotor can be taken out from the inside of the motor case. The objective is to provide a drive structure with a can-type electric motor that reduces the cost burden compared to the replacement of a set-type electric motor and makes it easy to remove the rotor.

Means for solving the problem

[0007] In order to solve the above problem, the drive structure using the can type electric motor of the present invention (Claim 1)

A rotor and a stator coil are provided inside the motor case,

The partition between the rotor and the stator coil is partitioned by a partition wall,

A driving shaft is coupled to one end of the rotor so as to be fixed in the rotational direction and slidably attached to and detached from the axial direction.

The motor case has an opening formed on a surface facing the other end surface of the rotor, and the rotor is formed so that the rotor can be pulled out from the inside of the motor case through the opening. It was formed so that the connection with the shaft was released by sliding in the axial direction.

[0008] In addition, the drive structure using the can electric motor according to the present invention (Claim 2) is the drive structure using the can electric motor according to Claim 1,

The motor case includes a case body in which a rotor and a stator coil are incorporated.

And a case cover attached in a state of closing the opening of the case body,

One end side rotor shaft protruding from one end of the rotor is detachably supported on the case body, and is fixed to the one end side rotor shaft in the rotational direction and is slidably attached to the axial direction. Connected to the drive shaft as The other end side rotor shaft projecting from the other end of the rotor is detachably supported by the case cover,

The case cover is formed by removing the case cover from the case body so that the opening of the case body is opened.

The rotor is formed so as to be able to be pulled out from the inside of the case body through the opening, and at the time of being pulled out, the connection between the one end side rotor shaft and the driving shaft is released by sliding in the axial direction.

[0009] Further, the drive structure by the can type electric motor of the present invention (Claim 3) is the drive structure by the can type electric motor according to Claim 1 or 2,

An impeller is attached to the drive shaft, and by rotating the impeller, a fluid feeding device that sucks fluid from the suction port formed in the pump casing and discharges it from the discharge port is formed! / The configuration.

The invention's effect

[0010] In the drive structure using the can type electric motor of the present invention (Claim 1), a drive shaft is connected to one end of the rotor so as to be fixed in the rotational direction and slidably attached to and detached from the axial direction. For this reason, the rotation S of the rotor is transmitted to the driving shaft while the rotor and the driving shaft are detachably connected to each other.

The rotor can be pulled out from the inside through an opening formed in the motor case, and the rotor and the driving shaft are connected to each other by an axial slide when the rotor is pulled out.

Therefore, when it is necessary to replace (or clean) the rotor, it is possible to remove the rotor by a simple operation of pulling it out through the opening.

[0011] In the drive structure using the can type electric motor of the present invention (Claim 2), when the case cover is removed from the case main body, the opening of the motor case is opened.

In this state, the rotor is pulled out from the inside of the motor case through the opening. At this time, the rotor shaft is slid in the axial direction with respect to the drive shaft and separated, so the rotor can be easily removed from the inside of the partition wall. Can be pulled out.

[0012] The rotor removed as described above was replaced (or cleaned) with a new rotor. After that, it can be easily fitted into the partition wall and assembled into the motor case in the reverse order of the above operation. At the time of the fitting, the force to connect the rotor and the drive shaft by sliding in the axial direction. S can.

[0013] Further, the drive structure using the can type electric motor of the present invention (Claim 3) can be applied to a fluid feeder by attaching an impeller to a drive shaft. For example, tire vulcanization is possible. Applicable to fluid feeders for supplying / discharging heated fluid to / from the bladder installed in the machine.

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 is a schematic cross-sectional view showing an embodiment of a fluid feed apparatus to which a drive structure using a can type electric motor of the present invention is applied. FIG. 2 is an embodiment of a tire vulcanizer provided with the fluid feed apparatus. It is a schematic sectional drawing shown.

A tire vulcanizer B shown in FIG. 2 includes upper and lower molds 7 and 7 and a bladder 70 that expands and contracts by supplying and discharging heated fluid, and is set inside the molds 7 and 7. On the inner surface of the raw tire T

By pressing the bladder 70 expanded by supplying heated fluid (high-temperature steam), vulcanization molding is performed while holding the raw tire T.

[0016] Inside the bladder 70, a fluid supply pipe 8a provided with an on-off valve 80 and a fluid discharge pipe 8b provided with an on-off valve 81 are connected, and are located closer to the bladder 70 side than the on-off valves 80, 81. In addition, the fluid supply pipe 8a and the fluid discharge pipe 8b are connected by a communication pipe 8c.

The communication pipe 8c, the fluid supply pipe 8a, the fluid discharge pipe 8b, and the bladder 7

A circulation closed circuit 8 is formed with the inside of 0, and a fluid feeder is provided on the circulation closed circuit 8.

A is arranged.

In this embodiment, the fluid feeding device A is disposed in the middle of the communication pipe 8c, but may be provided in the middle of the fluid supply pipe 8a or in the middle of the fluid discharge pipe 8b.

The communication pipe 8c is also provided with an opening / closing valve 82.

Accordingly, when the on-off valves 80 and 81 are opened with the raw tire T set in the molds 7 and 7 and the heating fluid is supplied from the fluid supply pipe 8a, the heating fluid flows into the bladder 70. Then, the on-off valves 80 and 81 are closed while the inside of the bladder 70 is filled with the heated fluid. [0018] After filling the inside of the bladder 70 with the heating fluid as described above, the open / close valve 82 of the communication pipe 8c is opened to open the circulation closed circuit 8.

In this state, the fluid feeding device A is operated to circulate the heating fluid in the circulation closed circuit 8, and this heating fluid circulates to maintain the bladder 70 at a uniform temperature with force S.

[0019] As described above, the raw tire T is vulcanized and molded while circulating the heating fluid in the circulation closed circuit 8. After the vulcanization molding is completed, the on-off valves 81 and 82 And the on-off valve 80 is closed to operate the fluid feeder A, whereby the heated fluid filled in the bladder 70 can be discharged at once from the fluid discharge pipe 8b.

[0020] The fluid feeder A is configured by applying a drive structure using a can type electric motor. The configuration of the fluid feeder A will be described with reference to FIG.

In FIG. 1, reference numeral 1 denotes a pump portion, and an impeller 13 is disposed inside a pump casing 10 having a suction port 11 formed in the center and a discharge port 12 formed on the outer periphery. By rotating 13, the heated fluid is sucked from the suction port 11 and discharged from the discharge port 12 in the circulation closed circuit 8.

The impeller 13 is attached to the lower end of the drive shaft 2, and the port 3 is attached to the upper end of the drive shaft 2.

This drive shaft 2 is supported by a bearing 21.

The rotor 3 is paired with a stator coil 4 provided around the rotor 3, and is configured as a can-type electric motor by partitioning the rotor 3 and the stator coil 4 by a partition wall 5.

This can type electric motor is formed in a DC motor in which magnetic poles are switched by a commutator (not shown).

[0024] The partition wall 5 is a non-magnetic material (titanium, stainless steel, plastic, aluminum, ceramic, etc., or a composite material containing this) or a weak magnetic material (titanium, stainless steel, plastic, aluminum, ceramic, etc.), or A composite material including the same).

[0025] The rotor 3 and the stator coil 4 are provided inside a motor case 6. The motor case 6 has a case body 60 with an upper end opened and a case so as to close the opening 61. The case cover 63 is detachably attached to the case body 60.

Therefore, by removing the case cover 63 from the case body 60, the opening 61 of the case body 60 is opened.

[0026] A lower end side rotor shaft 30 protrudes from the lower end of the rotor 3, and an upper end side rotor shaft 31 protrudes from the upper end, and the upper end side rotor shaft 31 is connected to the case via a bearing 32. The cover 63 is pivotally supported so as to be detachable.

[0027] The lower end side rotor shaft 30 is fixed to the driving shaft 2 in a rotational direction and is coupled so as to be slidable and detachable in the axial direction.

In this case, a parallel two-surface shaft 20 formed on the upper end surface of the drive shaft 2 and a parallel two-surface hole 34 formed on the lower end portion of the lower end side rotor shaft 30 are fitted to be slidable in the vertical direction. Forming.

Thus, the lower end side rotor shaft 30 can be separated from the drive shaft 2 by sliding in the axial direction while transmitting the rotation of the rotor 3 to the drive shaft 2.

[0028] The rotor 3 is formed so that it can be pulled out from the inside of the case body 60 through the opening 61. When the rotor 3 is pulled out, the connection between the lower end side rotor shaft 30 and the driving shaft 2 is axial. It is formed so as to be released by sliding.

[0029] Therefore, for example, when the outer peripheral surface of the rotor 3 is crushed or dust is attached, the opening 61 can be opened by removing the case cover 63 from the case body 60. .

Next, when the rotor 3 is pulled out from the inside of the case main body 60 through the opening 61, the lower end side rotor shaft 30 slides in the axial direction (upward) with respect to the drive shaft 2 and is thus separated. 3 can be easily pulled out from the inside of the case body 60.

[0030] After the rotor 3 taken out in this way is replaced (or cleaned) with a new rotor, the rotor 3 is simply fitted into the partition wall 5 and incorporated into the motor case 6 in the reverse order of the above operation. be able to.

Even in this case, the lower rotor shaft 30 can be easily connected to the driving shaft 2 by sliding in the axial direction.

[0031] Note that the fluid feeder to which the drive structure using the can type electric motor of the present invention is applied is indispensable. The present invention can be applied to a fluid feeding device provided in the middle of a flow path as a fluid feeding device for various industrial equipment which is not necessary to be used for supplying fluid to a bladder in a tire vulcanizer as described above.

Brief Description of Drawings

FIG. 1 is a schematic cross-sectional view showing an embodiment of a fluid feeder to which a drive structure using a can type electric motor of the present invention is applied.

FIG. 2 is a schematic cross-sectional view showing an embodiment of a tire vulcanizer provided with this fluid feeder. Explanation of symbols

[0033] 1 Pump section

10 Pump casing

11 Suction port

12 Discharge port

13 impeller

2 Drive shaft

20 Parallel 2-axis

21 Bearing

3 Rotor

30 Lower end rotor shaft

31 Upper rotor shaft

32 bearings

34 Parallel 2-sided hole

4 Stator coil

5 Bulkhead

6 Motor case

60 Case body

61 opening

63 Case cover 70 Bladder 8 Circulating closed circuit 8a Fluid supply pipe 8b Fluid discharge pipe 8c Communication pipe

80 On-off valve

81 On-off valve

82 On-off valve

A Fluid feeder B Tire vulcanizer T Raw tire

Claims

The scope of the claims

[1] A rotor and a stator coil are provided inside the motor case,

The motor case has an opening formed on a surface facing the other end surface of the rotor, and the rotor is formed so that the rotor can be pulled out from the inside of the motor case through the opening. A drive structure with a can-type electric motor, wherein the connection with the shaft is released by sliding in the axial direction.

[2] The motor case includes a case body in which a rotor and a stator coil are incorporated.

And a case cover attached in a state of closing the opening of the case body,

One end side rotor shaft protruding from one end of the rotor is detachably supported on the case body, and is fixed to the one end side rotor shaft in the rotational direction and is slidably attached to the axial direction. Connected to the drive shaft as

The other end side rotor shaft projecting from the other end of the rotor is detachably supported by the case cover,

The rotor is formed so that it can be pulled out from the inside of the case body through the opening, and the connection between the one end side rotor shaft and the driving shaft is released by sliding in the axial direction when the rotor is pulled out. Drive structure with can type electric motor as described in 1.

[3] An impeller is attached to the drive shaft, and by rotating the impeller, a fluid feeding device that sucks fluid from the suction port formed in the pump casing and discharges it from the discharge port is formed. The drive structure by the can type electric motor according to claim 1 or 2.