JPH0611094Y2 - Rotary drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Field of Industrial Application The present invention relates to a rotary drive device such as a stirring device for stirring liquid in the production of chemicals and chemicals or stirring gas in an oven.

(2) Conventional technology In the production of chemicals, chemicals, etc., there are cases where invasion of germs, dust, etc. is prevented and the inside of the agitation tank is evacuated or pressurized to agitate. As a stirring device in such a case, a motor (b) and a rotation transmission device (c) are provided on a frame (a) as shown in FIGS. 4 and 5, and the transmission device (c) is provided.
Is an outer cylinder (e) having a pulley groove (d) on the outer circumference of the lower end as shown in FIG. 5 and a stirring shaft (g) fitted and supported with a gap (f) in the outer cylinder (e). And a non-magnetic seal pipe (h) for sealing between the stirring shaft (g) and the outer cylinder (e) over the entire circumference in the gap (f), and the outer cylinder (e). ), The external magnet (i) is embedded in the stirring shaft (g), and the internal magnet (j) is embedded in the stirring shaft (g). The pulley (k) and the pulley groove fixed to the rotary shaft of the motor (b) are provided. A belt (1) is stretched between the outer cylinder (e) and the outer magnet (e) by driving the motor (b) through the belt (1). The stirring shaft (g) is rotated by the pulling action of the magnetic force between the inner magnet (j) of the stirring shaft (g) and the stirring tank (g). ) A stirring blade in a rotated,
There is also known a device in which the vacuum or high pressure state in the stirring tank (m) is secured by the seal pipe (h).

(3) Problems to be Solved by the Invention According to this conventional stirring device, the external magnets (i) and the internal magnets (j) are composed of Nagaishi magnets, and the magnetic force thereof decreases with time, thus increasing the A slip occurs due to a load, and a space is taken because the rotation transmission device (c) is mounted on the frame (a) together with the motor (b), and further, an outer cylinder (e) of the rotation transmission device (c). Also, the belt (1) is exposed to the outside and rotates, which is dangerous.

It is an object of the present invention to provide a rotary drive device for a stirrer or the like which has a simple structure and solves these drawbacks.

(4) Means for Solving the Problems In order to achieve this object, the present invention provides a stator in a motor housing in which a rotor is supported so as to face each other with a gap, and a synthetic resin is applied to the inner wall of the housing. It is characterized in that the stator is embedded, and at least the inner peripheral surface of the stator is coated with a thin film of the synthetic resin to maintain airtightness in the housing.

(5) Function The stator is embedded with synthetic resin, at least the inner peripheral surface of the stator is coated with a thin film of the synthetic resin, and the gap between the stator and the rotor is sealed over the front surface by the thin film to rotate the rotor or the like. Since the portion is sealed from the atmosphere, it is possible to easily secure a vacuum or high pressure in a tank such as a stirring tank having stirring blades connected to the rotating portion.

(6) Example 1 The rotary drive device of the present invention was applied to a stirring device of a stirring tank.
An embodiment will be described with reference to FIG.

(1) shows a motor which is a rotary drive device, and the motor (1) is a stator (1b) embedded in a thick housing (1a) made of synthetic resin and a gap (2) in the stator (1b). ), And the rotor is inserted and supported (1
c) and the rotating shaft (1) fitted in the center hole of the rotor (1c).
d) and.

(3) shows a cylindrical thin film, and the thin film (3) is formed integrally with the housing (1a) so as to coat the inner peripheral surface of the stator (1b) with a synthetic resin. The rotor (1c) and the rotating shaft (1d) are intervened in the gap (2) to seal the rotor (1c) and the rotating shaft (1d) from the atmosphere.

Incidentally, (4) shows a stirring tank formed in the body (5), (6) shows a lid of the body (5), and a support base (7) having a T-shaped section fixed to the lid (6). The motor (1) was fixed to.

(8) is a stirring blade fixed to a stirring shaft on the extension of the rotating shaft (1d), (9) is a valve interposed on the extension of the suction pipe (10), and (11) and (12) are pressure derivation pipes ( A pressure gauge and a relief valve provided on the extension of 13), (14) a cooling water pipe, (15) a bearing, and (16) an O-ring.

Thus, a predetermined solution requiring stirring is put in the stirring tank (4), the motor (1) is driven, and the stirring blade (8) is rotated to stir. Here, when this stirring is carried out under vacuum or high pressure, the rotating shaft (1d) and the rotor (1c) connected to the stirring blade (8) are sealed from the atmosphere by the cylindrical thin film (3). ) Inside is kept vacuum or high pressure, so that germs, dust, etc. are not mixed in the solution, and if the stirring tank (4) is connected to an oven etc., the air in the oven can be stirred in a clean environment. Become.

FIG. 2 shows another embodiment, in which a synthetic resin is enclosed so that the stator (1b) is embedded in a housing (1a) to which the stator (1b) is fixed, and the inside of the stator (1) is A substantially cylindrical thin film (3) made of the synthetic resin is integrally formed on the upper and lower portions of the peripheral surface, and has a higher mechanical strength than the example.

FIG. 3 shows still another embodiment. In this embodiment, the motor (1) has a doughnut-shaped stator (1b) and a doughnut-shaped rotor (1) facing each other with a gap (2) on the lower surface thereof. 1c), the stator (1b) is embedded in a thick housing (1a) made of synthetic resin of the motor (1), and the lower surface of the stator (1b) is a thin film (3) of the synthetic resin. ) Is coated.

Incidentally, in the motor (1) of this embodiment, there is a housing for the motor (1) as in the embodiment of FIG. 2 and the stator (1b) fixed to the housing is embedded in the housing with synthetic resin, and The lower surface of the stator (1b) may be coated with the thin film (3) of the synthetic resin.

(7) Effect of the Invention Thus, according to the present invention, since the stator portion is made of synthetic resin and the gap between the stator and the rotor is sealed with a thin film of synthetic resin, the rotating portion of the rotor or the like is sealed from the atmosphere. Vacuum or high pressure in a tank such as a stirring tank having stirring blades connected to the rotating portion can be easily ensured, and this seal is a thin film of synthetic resin adhered to at least the inner peripheral surface of the stator. Therefore, the gap between the stator and the rotor can be made small, and thus the rotor can rotate efficiently, and since the rotation transmission device unlike the conventional device is unnecessary, the rotational force can be directly obtained from the rotary drive device. It is possible to prevent the occurrence of slippage, save space, and keep the rotating part exposed to the outside, so it is safe, has good insulation and moisture resistance, and has a simple structure and is inexpensive. Has the effect of being

[Brief description of drawings]

FIG. 1 is a front view of a device according to one embodiment of the present invention, a part of which is cut away, FIG. 2 is a front view of a part of another embodiment cut away, and FIG. 3 is a cross-sectional view of yet another embodiment. FIG. 4 is an overall front view of the conventional device, and FIG. 5 is a semi-cut front view of the rotation transmission device. (1) …… Rotary drive device (1a) …… Housing (1b) …… Stator (1c) …… Rotor (2) …… Gap (3) …… Thin film

Claims (1)

[Scope of utility model registration request] 1. A motor in which a rotor is supported by a stator in a housing so as to face each other with a gap, and the stator is embedded in an inner wall of the housing with a synthetic resin, and at least an inner peripheral surface of the stator is provided. A rotary drive device, characterized in that the housing is kept airtight by coating with a thin film of the synthetic resin.