JPS60257749A - Implanting method of vent pipe in warren motor - Google Patents

Abstract

PURPOSE:To implant a vent pipe without special punching work by implanting the pipe to an outer housing simultaneously while boring a vent pipe engaging hole at the housing by the pipe. CONSTITUTION:When a punch 20 is continuously pressed, part of extruded portion into a hole 170 of a lower die 17 is broken, a hole 38 is bored (extruded) together with a sheather 37 at a cover 32, and when it is pressed until the large- diameter part 201 of a punch 20 is contacted with the upper surface of an upper die 18, a vent pipe 16 is implanted in the prescribed depth to the cover 32 to complete the implanting of the pipe 16 into the cover 32. Thus, since the pipe 16 is implanted into the hole simultaneously while boring the hole 38 at the housing by the pipe 16 itself, special punching step can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a Warren motor having a two-pole shaded synchronous motor, more specifically, an output shaft that receives the rotation of a rotor through a reduction gear train, and houses the rotor and the reduction gear train. and an outer casing having a storage space sealed from the outside air, an output shaft bearing that supports the output shaft and has a bearing hole with one end communicating with the storage space and the other end communicating with the outside air and holding lubricating oil; Warren having a ventilation pipe embedded in the housing, one end of which communicates with the storage space and the other end of which communicates with the outside air to eliminate the difference in air pressure between the inside and outside of the outer housing and prevent lubricating oil from being discharged from the output shaft bearing. The present invention relates to an improvement in a method for installing the ventilation pipe in a motor.

[Prior art]

Figures 3 and 4 show conventional Warren motors of this type.
There was something shown in the figure. In Fig. 3, (1) is the iron core, (2) is the coil wound around one end of the iron core (1), and (3) is the coil wound around one end of the iron core (1).
) is the outer casing joined to the other end of the iron core (1), and the outer casing (3)
A rotor (4) is provided inside the rotor (4) at a position where it is subjected to the action of an alternating magnetic field formed on the iron core (1) by the coil (2). (5) is the rotor shaft of the rotor (4), (6) is the rotor gear fixed to the rotor @ (5), (7) is the reduction gear train connected to the rotor gear (6), (8) is the pillar (9
) are fixed in parallel at regular intervals to the outer casing (3) and support the rotating shaft (5) and the gear shaft of the reduction gear train (7); (10) is the outer casing; (3)
A storage space (11) contains the rotor (4) and the reduction gear train (7), and the output shaft gear (12) and the output tooth rl'E (13) are connected to the reduction gear train (7). An output shaft (14) having an output shaft (14) supports the output shaft (11), has one end located in the storage space (10) and communicates with the storage space (10), and has the other end located in the outside air to communicate with the outside air. communicates with the bearing hole (
141).

The outer casing (3) consists of a case (31) and a cover (32), and the joint between the case (31) and the cover (32) and the output shaft bearing penetration part of the cover (32) are made of a suitable material such as synthetic resin. The storage space (10) is sealed with a sealing material (33).
The storage space (10) is sealed from the outside air to prevent dust from entering, and the Re oil inserted into the storage space (10) is prevented from leaking from the joint.

Further, lubricating oil (15) is filled and held in a substantially cylindrical shape in the gap between the output shaft (1) and the output shaft bearing (14) by affinity due to capillary action.

Next, the operation of the Warren motor will be explained. When alternating current E is applied to the coil (2), an alternating magnetic field is applied to the iron core (1), and the rotor (4) is affected by this alternating magnetic field and rotates at the source frequency. This rotational force is generated by the reduced ti vehicle train (7), the output shaft gear (12), and the output; Yuzu (1
1) to the output gear (13).

By the way, when the Warren motor is operating, heat is generated in the storage space 1 (10) due to meshing of various gears, friction between various gear shafts and bearings, etc., and the pressure in the storage space (10) increases. Since the storage space (10) is sealed from the outside air as described above, the lubricating oil (15) held between the output shaft (11) and the output shaft bearing (14)
However, the pressure inside and outside of the storage space (10) leaks to the outside of the outer casing (3) as shown by arrow A in FIG. 4 until the pressure inside and outside of the storage space (10) reaches an equilibrium state. Next, when the application of AC voltage to the coil (2) is stopped, the rotation of the various gears also stops, and the generation of frictional heat disappears, so the temperature of the storage space (10) decreases, and accordingly, the temperature inside the storage space (10) decreases. Air pressure also decreases. Therefore, the lubricating oil (15) now moves in the direction of arrow B in FIG. 4 until the pressures inside and outside of the storage space (10) are balanced. However, once the lubricating oil (15) leaks out of the outer casing (3), it cannot return into the output shaft bearing (14), and the lubricating oil leaks out little by little each time the Warren motor operates. Become. As a result, the lubricating oil (15) held in the output shaft bearing (14)
If the amount is insufficient, the output shaft (11) and output shaft bearing (14) may wear out or seize.

In order to prevent this, a cover (3
A ventilation pipe (16) is installed in 2), and this ventilation pipe (
16) communicates the storage space (10) with the outside air by connecting one end to the storage space (10) and the other end to the outside air;
It has been conventionally proposed that this eliminates the pressure difference between the storage space (10) and the outside air and prevents the lubricating oil (15) from leaking from the output shaft bearing (14).

Conventionally, as a means for installing the ventilation pipe (16), as shown in FIG.
A hole (34) with a slightly smaller diameter than the outer diameter of the hole (16) is formed by press punching, and a lower mold (17) and a lower mold (18) as shown in FIG. ) and a punch (19) using an assembly jig consisting of a ventilation pipe (1
6) is being manufactured manually. However, with such conventional fixing means, the holes (34) in the cover (32)
Not only does it require a special press punching process to drill holes in the vent pipe (1
The outer diameter of the hole (34) and the outer diameter of the hole (34) must be maintained with strict dimensional accuracy.
5) and the broken part (36) actually occurs in the ventilation pipe (16).
Since the straight part that holds the pipe is only as small as the thickness of a board, it is not possible to obtain sufficient adhesion force, and the ventilation pipe (
16) easily falls off, and the ventilation pipe (16) is not held in the correct installed position.

The present invention has been made in order to solve the problem of the conventional one, and has a special feature in which the vent pipe is installed in the outer casing while simultaneously burring the vent pipe fitting hole in the outer casing. To provide a method for installing a ventilation pipe, which does not require a heavy punching process, does not cause problems with the dimensional accuracy of the pipe and the hole into which it is press-fitted, and can secure a longer fitting length than before. It is intended for the purpose of

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be explained as shown in Figs. 1 (a), (b),
(c) will be explained.

In Figure 1, (32) is a lower mold (17) with a cover and receiver (170) made of the same aluminum material as the conventional product.
is placed on top.

(18) is an upper mold, which is placed on the cover (32) placed on the lower mold (17), and is placed on the lower mold receiver (17).
A guide hole (180) is provided concentrically with 0). (16) is a ventilation pipe made of steel material (for example, stainless steel) that is implanted in the cover (32), and is inserted into the guide hole (X5O) of the upper mold (18).

(20) is a punch with a small diameter part (200) and a large diameter part (
201). The diameter of the small diameter part (200) of the punch (20) is approximately equal to the outer diameter of the ventilation pipe (16), and the diameter of the large diameter part (201) is larger than the guide hole (180) of the second type (18). It is. Next, Figure 1 (a)
, (B), (C) according to the order of ventilation pipe (16
) to the cover (32) will be explained.

As shown in Figure 1 (a), the cover (32) is attached to the lower mold (17).
Place the upper mold (18) on top of it, then put the upper mold (18) on top of it.
8) Drop the ventilation pipe (16) into the guide hole (180), then insert the small diameter part (200) of the punch (20) into the guide hole (180), and lower the punch (20).
Push in the direction of (17'). When appropriate, remove the ventilation pipe (1
6) is pressed against the surface of the cover (32).

When the press is further tightened, a part of the cover (32) is pushed into the lower mold (1) by the ventilation pipe (16), as shown in Figure 1 (B).
7) into the recipient (170). Furthermore, punch (
20), a part of the lower die (17) pushed out into the receiver (170) breaks, as shown in FIG. When the hole (38) is burred (extruded) together with 37) and the large diameter part (201) of the punch (20) is pushed in until it comes into contact with the upper surface of the upper mold (18), the hole (38) is pressed into the cover (32) to a predetermined depth. The ventilation pipe (16) is driven into the cover (32) as shown in FIGS. 1(c) and 2.
) planting is completed.

In addition, in the above embodiment, the ventilation pipe (16) is connected to the cover (3).
Although we have explained the case of planting in case (2), case (31)
) may be planted at an appropriate location.

〔Effect of the invention〕

As described above, in the present invention, a fitting hole is made in the outer casing by the ventilation pipe itself to connect the ventilation pipe that communicates the storage space with the outside air, and at the same time, the ventilation pipe is implanted into the hole. This eliminates the need for strict dimensional control, which shortens the manufacturing process and significantly reduces assembly costs. Furthermore, since the pipe fitting hole in the outer casing is burred (extruded) with the ventilation pipe, the fitting length can be several times longer than conventional ones, and the pipe can be firmly held in the correct position. play.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view of a Warren motor in which a ventilation pipe is installed according to the present invention, FIG. 3 is a vertical cross-sectional view of a conventional Warren motor, and FIG. The figure is an enlarged cross-sectional view of the output shaft bearing part of the one in Figure 3, and Figures 5 and 6 are explanatory diagrams of installing and assembling the ventilation pipe of a conventional Warren motor. shows. In Figure 1, (3) is the outer casing, (4) is the rotor, and (7) is the outer casing.
is the reduction gear train, (11) is the output shaft, (14) is the output shaft bearing, (141) is the bearing hole, (15) is the lubricating oil, (16) is the ventilation pipe, (20) is the punch, (38) is the This is a vent pipe fitting hole. Agent Patent attorney Masuo Oiwa Figure 2 Figure 3 Procedural amendment (voluntary) 1. Indication of the case Japanese Patent Application No. 115903/1982 2. Name of the invention Method for installing ventilation pipes in Warren motors 3. Amendment Relationship with the case involving the person who filed the patent application Patent applicant address: 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name:
(601,) Mitsubishi Electric Corporation Representative Hitoshi Katayama Department 5, "Detailed Description of the Invention" column 6 of the specification subject to amendment, Contents of the amendment (1) Page 4, lines 14 to 14 of the specification In line 16, ``Various gears --- heat is generated,'' is changed to ``The storage space (10) is heated by the Joule heat of the coil (2), the iron loss of the iron core (1), and the heat generated. ” Seven corrections. (2) Page 5, lines 4 and 5, “Various gears---
- Correct "no more heat generation" to "no more heat generation in the coil (2) and iron core (1)."that's all

Claims (1)

[Claims] (1) An output shaft that receives the rotation of the rotor via a reduction gear train, an outer casing that houses the rotor and the reduction gear train and has a storage space sealed from the outside air, and an outer casing that supports the output shaft and has one end an output shaft bearing that holds lubricating oil and has a bearing hole that communicates with the storage space and the other end communicates with the outside air; and a ventilation pipe that is implanted in the outer casing and has one end that communicates with the storage space and the other end that communicates with the outside air. The method for installing the ventilation pipe in the Warren motor having the above-mentioned Warren motor is characterized in that a pre-air ventilation pipe is installed in the outer casing at the same time as the ventilation pipe is burred into the ventilation pipe fitting hole in the outer casing. How to install ventilation pipes in motors.