JPS60261342A - Providing method of ventilating pipe for warren motor - Google Patents

Abstract

PURPOSE:To provide ventilating pipes firmly reducing the number of man-hour for industrial process, by a method wherein punches are inserted into the ventilating pipes and fitted holes are bored through covers by the punches and at the same time the ventilating pipes are inserted into the fitted holes. CONSTITUTION:When ventilating pipes 16 for the connection between the open air and the containing space for containing reduction gear trains in the covers 32 of a Warren motor is provided, then the tips of the ventilating pipes 16 are butted to the outer faces of the covers 32 at first and in this state, the small diameter sections 200 of the punches 20 are inserted inside the ventilating pipes 16. And fitted holes are bored through the covers 32 by the small diameter sections 200 of the punches 20 and at the same time the ventilating pipes 16 are pressed down by the medium diameter sections 201 provided with the punches 20 and the ventilating pipes 16 are arranged to be provided into the fitted holes bored by the small diameter sections 200 of the punches. As the result, the fitted length is made larger so that the pipes may be firmly provided.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a Warren motor having a two-pole shaded synchronous motor, and more particularly to an output shaft that receives the rotation of a rotor via a reduction gear train, the rotor, and An outer casing that houses a reduction gear train and has a storage space sealed from the outside air, and has a bearing hole that supports the output shaft and communicates with the storage space at one end and the outside air at the other end, and holds lubricating oil. The output shaft bearing is embedded in the output shaft bearing and the outer casing, and one end communicates with the storage space and the other end communicates with the outside air to eliminate the difference in air pressure inside and outside the outer casing, and to prevent lubricating oil from being discharged from the output shaft bearing. The present invention relates to an improvement in a method for installing a ventilation pipe in a Warren motor having a ventilation pipe that prevents the use of air.

[Prior art]

Figures 3 and 4 show conventional Warren motors of this type.
There was something shown in the figure. In Figure 3, (1) is the iron core, (2 is the coil wound around one end of the iron core (1), (3)
is an outer casing joined to the other end of the iron core (1), and inside the outer casing (3) there is a rotor (4) located at a position where it is affected by an alternating magnetic field formed on the iron core (D) by the coil [2]. (5) is the rotor shaft of the rotor (4), (6) is the rotor gear fixed to the rotor shaft (5), and (7 is the rotor gear (6).
) is connected to the reduction gear train (8), which is fixed in parallel at regular intervals by the support (9) and fixed to the outer casing (3). A pair of shaft support plates (10) support the rotor (4) and the reduction gear train (7) in the outer casing (3);
) is the output shaft gear (12) connected to the reduction gear train (7)
and an output gear (13), the output shaft (14) supports the output shaft (11), has one end located in and communicates with the storage space (10), and has the other end is an output shaft bearing located in the outside air, communicating with the outside air, and having a 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 synthetic resin. The storage space (1) is sealed with a suitable sealing material (33).
0) The storage space (10) is sealed from the outside air to prevent dust from entering the storage space (10), and the lubricating oil sealed in the storage space (10) is prevented from leaking from the joints. Furthermore, a gap between the output shaft (11) and the output shaft bearing (14) is filled with lubricating oil (15) in a substantially cylindrical shape due to affinity caused by capillary phenomenon.

Next, the operation of the weave motor will be explained. When an alternating current voltage is applied to the coil (2), an alternating magnetic field is formed in the iron core (1), and the rotor (4) is affected by this alternating magnetic field and rotates in synchronization with the power supply frequency. This rotational force is transmitted to the reduction gear train (7), the output shaft gear (12), and the output shaft (11).
is transmitted to the output gear (13) via.

By the way, during operation of the Warren motor, in particular, heat is generated in the storage space (10) due to meshing of various gears, friction between various gear shafts and bearings, etc., and 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)
leaks out to the outside (3) as shown by arrow A in FIG. 4 until the pressure inside and outside the storage space (10) reaches an equilibrium state. Next, when the application of AC voltage to coil (2) is stopped,
The rotation of the various gears also stops and frictional heat is no longer generated, so the temperature of the storage space (10) decreases, and the air pressure within the storage space (10) also decreases accordingly. 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 to the output shaft bearing (14), and a small amount of lubricating oil (1 d) leaks out every time the Warren motor operates. become. As a result, the lubricating oil (15) held in the output shaft bearing (14)
) is insufficient, and the output shaft (11) and output shaft bearing (14)
This may cause wear or seizure.

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 diameter slightly smaller than the outer diameter of the hole (34) of the hole (16) is formed by press punching, and then the hole (34) of the
The ventilation pipe (16) is assembled using an assembly jig consisting of a lower die (17), an upper die (18) and a punch (19) as shown in the figure.
A method of press-fitting is used. However, such conventional fixing means not only requires a special press punching process to make the hole (34) in the cover (32), but also requires a special press punching process to form the hole (34) in the cover (32). 16
) and the hole diameter of the hole (34) must be maintained with strict dimensional accuracy.
5) and a fractured part (36), which actually breaks the ventilation pipe (16).
) The straight part that holds the pipe is only a box, about 1/3 of the board thickness, so it is not possible to obtain sufficient pipe fixing force, and the ventilation pipe (16) tends to fall off. There were drawbacks such as not being able to maintain a tight posture.

[Summary of the invention]

The present invention has been made in order to solve the problem of the conventional one, and includes inserting a punch into the ventilation pipe, burring the fitting hole with the punch, and simultaneously planting the ventilation pipe into the fitting hole. By doing so, it is possible to plant a ventilation pipe that does not require a special press punching process, eliminates problems with the dimensional accuracy of the ventilation pipe and the hole into which it is press-fitted, and can secure a longer fitting length than before. The purpose of this document is to provide a method for setting up the system.

[Embodiments of the invention]

An embodiment of this invention is shown in FIGS. 1(A) and 1(B) below.

(c) will be explained.

In Fig. 1, (32) is a cover made of the same aluminum material as the conventional product, and the lower mold (17o) has a receiver (17o).
) 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).
0 (16) is a ventilation pipe made of steel (for example, stainless steel) that is installed in the cover (32), and has a guide hole (180) concentrically with the upper mold (18). is inserted into the guide hole (180) of.

(20) is a punch with a small diameter part (200 mm) with a sharp tip.
), a medium diameter part (201) and a large diameter part (202),
The diameter of the small diameter portion (200) is slightly smaller than the hole of the ventilation pipe (16) so that it can be loosely inserted into the hole of the ventilation pipe (16), and the overall length of the small diameter portion (200) is longer than that of the ventilation pipe (16). It is. The diameter of the medium diameter part (201) is the same as that of the ventilation pipe (1
6), and the diameter of the large diameter portion (202) is approximately equal to the outer diameter of the upper mold (202).
It is larger than the guide hole (180) of 18).

The procedure for installing the ventilation pipe (16) in the cover (32) will be explained again in the order shown in FIGS. 1(a), (b), and (c).

As shown in Figure 1 (a), the cover (32) is attached to the lower mold (17).
and cover it with the upper ff (18). Next, the upper mold (
Drop the ventilation pipe (16) into the guide hole (180) of the ventilation pipe (18), and then insert the ventilation pipe (16) into the hole of the ventilation pipe (16).
20), and push the punch (20) toward the lower die (17). In such a case, remove the small diameter part (2
Since the total length of 00) is longer than the ventilation pipe, punch (20)
The tip of the small diameter portion (200) of the cover (32) is pressed into the receiver (170) of the lower mold (17),
Eventually, the abutting portion of the cover (32) will break through within the receiver (170) of the lower die (17).

If you continue pushing further, the middle diameter part (20
1) comes into contact with the ventilation pipe (16), and thereafter the ventilation pipe (
16) is integrated with the punch (20), and the upper mold (18)
is guided by the guide hole (180) of the punch (20) and pressed vertically against the cover (32),
The ventilation pipe (16) is further pushed into the cover (32) while suppressing the extrusion of the fitting hole which has been burred (extruded) by the method 00).

As shown in Figure 1, the large diameter part (20) of the punch (20)
2) until it comes into contact with the top surface of the upper mold (18), the ventilation pipe (16) is driven into the cover (32) at a predetermined depth, as shown in Figure 1 (c) and Figure 2. Cover (3
The installation of the ventilation pipe (16) to 2) 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, the ventilation pipe that communicates the storage space with the outside air is drilled in the outer casing by the cooperation of the ventilation pipe and the punch, and the ventilation pipe is simultaneously planted into the hole. It is no longer necessary to carry out strict dimensional control as in conventional products, and together with the shortening of the manufacturing process, it is possible to significantly reduce manufacturing 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 that of conventional ones, and the ventilation pipe can be firmly held in the correct position. play.

Furthermore, since the punch is inserted into the hole in the vent pipe, the vent pipe will not buckle, and the hole in the vent pipe will not be clogged with shavings generated during extrusion.

[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 from Figure 3.J: Enlarged longitudinal sectional view of the output shaft bearing part,
FIGS. 5 and 6 are explanatory diagrams for installing and assembling a ventilation pipe of a conventional Warren motor, and the same reference numerals in the figures indicate the same or equivalent parts. In the figure, (3) is the outer casing, (4) is the rotor, (7) is the reduction gear train, (11) is the output shaft, (14) is the output shaft bearing, (141) is the bearing hole, ( 15) is lubricating oil, (16) is a ventilation pipe, and (20) is a punch. Agent Patent Attorney Masuo Oiwa - Loss - No. 254 Figure 3 Procedural Amendment (Voluntary) Pipe installation method 3, person making the amendment 5, “Detailed description of the invention” of the specification to be amended Column 6, Contents of amendment (1) In page 4, lines 14 to 16 of the specification, "heat is generated in each gear" has been changed to "Joule heat of coil (2), iron core ( 1) The storage space (10) is heated by the heat generated due to the iron loss.'' Ru. that's all

Claims (1)

[Claims] (1) An output shaft that receives 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 supports the output shaft and has one end. has a bearing hole that communicates with the storage space and the other end with the outside air, and is implanted in an output shaft bearing that retains lubricating oil and the outer casing, and has one end that communicates with the storage space and the other end with the outside air. In the method for installing the ventilation pipe in a Warren motor having a communicating ventilation pipe, a punch is inserted into the ventilation pipe, and while the punch is burring the fitting hole, the ventilation pipe is simultaneously planted in the fitting hole. A method for installing a ventilation pipe in a Warren motor, characterized by: