JPS6130014Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an oil burner used in hot air blowers, etc., and in particular to a so-called vertical oil burner having an oil pump driven by an open-bottom motor with a drive shaft disposed below. The present invention relates to a structure for preventing oil intrusion on the lower surface of the motor.

Conventionally, as this type of vertical oil burner, for example, as shown in Fig. 3, on a fixed plate a,
A motor c with a drive shaft b disposed below and an open bottom surface is disposed, and at the lower end of the drive shaft b of the motor c,
Oil pump e having a pump chamber d open to the atmosphere
At the same time, the pump chamber d of the oil pump e is divided into upper and lower parts by a partition plate g having a central hole f through which the drive shaft b passes through, and an oil supply port (not shown) is provided on the upper side. A communicating oil storage chamber h,
A rotor chamber i communicating with the oil reservoir chamber h through the center hole f of the partition plate g is defined on the lower side, and the oil supplied to the oil reservoir chamber h is sucked into the rotor chamber i and discharged. It is known that this was done. Furthermore, the third
In the figure, j is built in the lower part of the motor c and is attached to the drive shaft b.
k is a mounting plate for supporting the partition plate g, and 1 is a vortex prevention plate formed on the mounting plate k.

However, in the conventional system, the lower surface of the motor c, which is the drive source of the oil pump e, is open and faces the oil sump chamber h, so the drive vibration causes the oil sump chamber h to
When the oil surface vibrates or the oil flows up along the rotating drive shaft b, oil enters the bearing part j from the lower surface of the motor c, and washes away the lubricating oil (grease) from the bearing part j. As a result, the motor c seizes and rotates poorly, resulting in a motor lock phenomenon.

In addition, in order to prevent such motor lock,
If a closed type motor is used as the motor c, there is a problem in that the cost is high.

In view of the above, the present invention aims to provide an oil burner which prevents the motor from locking in the above-mentioned vertical oil burner with a simple structure.

That is, the present invention is an oil pump in which the pump chamber of an oil pump driven by a motor with a drive shaft disposed downward and an open bottom is partitioned vertically into an oil reservoir chamber and a rotor chamber by a partition plate. In the burner, on the lower surface of the motor facing the upper side of the oil sump chamber,
A medium-convex protective cover plate having a through hole in the center through which the drive shaft passes and slopes downward toward the through hole is provided, and a burring portion hanging downward is provided on the periphery of the through hole of the protective cover plate. At the same time, a scattering plate fixed to the drive shaft is provided in the interior surrounded by the protective cover plate, so that the oil splashing and entering from the oil reservoir chamber is blocked by the protective cover plate,
In particular, the burring part reliably prevents splashing and infiltration from the through-hole of the protective cover plate, and even if oil travels up the drive shaft and enters the interior through the through-hole of the protective cover plate, this oil will be rotated. The oil is scattered around by the scattering plate and flows down along the inner surface of the protective cover plate, thereby reliably preventing oil from entering from the bottom of the motor and collecting the oil that attempts to enter into the oil sump chamber again. This is how it was done.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 shows an oil burner A for a hot air blower according to the present invention, where 1 is a housing, 2 is a double-shaft motor disposed in the center of the housing 1 with a drive shaft 3 in the vertical direction, The upper and lower surfaces of the double-shaft motor 2 through which the drive shaft 3 projects are open. Reference numeral 4 denotes an oil pump for feeding oil, which is disposed below the double-shaft motor 2 and driven by the motor 2. The oil pump 4 supplies oil fuel into the pump receiver 5 through an oil supply port 6. The pump chamber 7 is divided into upper and lower parts by a partition plate 8 having a central hole 8a through which the drive shaft 3 passes, and the pump chamber 7 has an oil reservoir chamber communicating with the oil supply port 6. 7a and a rotor chamber 7b are formed, the lower end of the drive shaft 3 of the double-shaft motor 2 extends into the rotor chamber 7b, and an oil rotor 9 is fixed to the lower end of the drive shaft 3, The oil rotor chamber 9, which rotates with the rotation of the drive shaft 3 of the motor 2, is configured to suck oil from the oil reservoir chamber 7a into the upper part of the rotor chamber 7b and discharge it from the lower part of the rotor chamber 7b.

Further, the upper end of the drive shaft 3 of the double-shaft motor 2 extends to the center of the carburetor 18, which will be described later, and an oil supply passage 10 is formed in the center of the drive shaft 3. The lower end of the oil supply passage 10 communicates with the rotor chamber 7b of the pump chamber 7 via an orifice 11 with a filter. On the other hand, a boss member 1 is provided at the upper end of the drive shaft 3 and has a vertical communication passage 12 that communicates with the upper end of the oil supply passage 10.
3 is connected to the boss member 13 and the upper end of the drive shaft 3 with a diffusion part 14 sandwiched between the boss member 13 and the upper end of the communication path 12, and communicates with the upper end of the communication path 12 in the radial direction (horizontal direction). ) with multiple openings (for example, 4
horizontal discharge ports 15, 15... are provided on the outer periphery of the upper end of the boss member 13
Diffusion vane 1 having collision plate portions 16a, 16a... facing each horizontal discharge port 15 with a certain angle deviation
6 is installed. Therefore, the oil from the oil pump 4 is transferred to the oil supply passage 10 of the drive shaft 3 and the boss member 1.
Each horizontal discharge port 15, 15 via the communication path 12 of 3
... is discharged in the horizontal direction, and the discharged oil is diffused by the diffusion plate 14 and the diffusion vanes 16, and is atomized by collision with the collision plate parts 16a, 16a, etc. of the diffusion vanes 16, and then enters the vaporizer 18. configured to supply.

On the other hand, 17 is a combustion air plate fan fixed to the upper part of the drive shaft 3 of the double-shaft motor 2 and driven, and 18 is an oil fuel disposed above (downstream) of the plate fan 17 at a predetermined distance. A preheating electric heater 19 is disposed on the outer periphery of the vaporizer 18 to heat the vaporizer 18 to promote vaporization. Through the cylindrical shape vaporizer 2
1 is provided, and a flame port 22 made of a wire mesh is formed on the outer peripheral surface of the vaporization tube 21, while an electrode plug 23 for ignition is arranged near the flame port 22 and facing each other through a gap. The vaporizer 18
The oil fuel supplied to the fuel tank and vaporized by the vaporizer 18 is mixed with the air taken in by the plate fan 17 from the intake port 24 provided in the housing 1, and this gaseous fuel is passed through the electrode plug 23 at the flame port 22. The structure is such that it is ignited and combusted by a discharge arc.

As a feature of the present invention, as shown in enlarged detail in FIG. 2, on the lower surface of the motor 2 facing above the oil reservoir chamber 7a of the pump chamber 7, there is a through hole 25 through which the drive shaft 3 passes through the center. A protective cover plate 26 having a downwardly bulging convex shape protects the motor 2.
The protective cover plate 26 is fixed at its outer peripheral end so as to cover the open portion of the lower surface, and the protective cover plate 26 is formed to be inclined downward toward the through hole 25.
Further, a burring portion 26a that hangs downward is formed at the periphery of the through hole 25 by burring. Furthermore, a disk-shaped scattering plate 27 is provided in the space surrounded by the protective cover plate 26 for driving the drive shaft 3.
The drive shaft 3 is fixed to the drive shaft 3 and rotates together with the drive shaft 3.

In FIG. 1, reference numeral 28 indicates the oil supply passage 1 so as to leak air mixed into the oil supply passage 10.
0 is a leak hole that opens upward through the communication path 12 of the boss member 13, 29 is a mounting plate that supports the partition plate 8, and 30 is a vortex prevention plate formed on the mounting plate 29, This is for suppressing the generation of vortices so as to prevent air from being drawn into the rotor chamber 7b of the chamber 7, and 31 is an oil drain port. Further, in FIG. 2, reference numeral 32 denotes a bearing section provided at the lower part of the motor 2 to rotatably support the drive shaft 3.

Therefore, in the above embodiment, the motor 2
When the oil pump 4 is operated by the drive, the oil level in the oil reservoir chamber 7a of the pump chamber 7 vibrates due to the drive vibration, etc., and the oil scatters upward. It is blocked by the cover plate 26 and does not enter the inside of the motor 2 (bearing portion 32, etc.) from the bottom surface of the motor 2. Moreover, a burring portion 26a hanging downward is provided at the periphery of the through hole 25 of the protective cover plate 26 through which the drive shaft 3 is passed.
By providing this, it is possible to reliably prevent splashed oil from entering through the through hole 25.

Further, the drive shaft 3 on which the oil in the oil reservoir chamber 7a rotates
along the through hole 2 of the protective cover plate 26.
5, this oil enters the protective cover plate 26 through the drive shaft 3, but this oil is scattered to the inner surface of the surrounding protective cover plate 26 by the scattering plate 27 that rotates together with the drive shaft 3.
The oil flows down along the inner surface which slopes downward toward the through hole 25, falls from the through hole 25, and is collected again in the oil sump chamber 7a.

Therefore, in this way, it is possible to reliably prevent the oil in the oil reservoir chamber 7a from entering the inside of the motor 2 from the lower surface of the motor 2, prevent the occurrence of motor lock due to seizure of the bearing part 32, and prevent oil from being scattered. It has the advantage that oil and the like can be reliably collected into the oil reservoir chamber 7a and there is no wasteful consumption of oil.

As explained above, according to the present invention, in a vertical oil burner, the lower surface of the open-bottom motor facing the upper side of the oil reservoir chamber of the pump chamber has a through hole through which the drive shaft passes through the center. A medium convex protective cover plate is provided that slopes downward toward the through hole.
And, even with a simple structure in which a burring part that hangs downward is formed on the periphery of the through hole of the protective cover plate, and a scattering plate fixed to the drive shaft is provided inside the protective cover plate, The motor lock can be reliably prevented, the durability of the motor can be improved, and oil consumption can also be reduced.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view showing an embodiment of the present invention;
The figure is an enlarged view of the main part of FIG. 1, and FIG. 3 is a sectional view of the main part showing a conventional example. 2...Double shaft motor, 3...Drive shaft, 4...Oil pump, 7...Pump chamber, 7a...Oil reservoir chamber, 7b...
...Rotor chamber, 8...Partition plate, 25...Through hole, 2
6...protective cover plate, 27...dispersion plate.

Claims (1)

[Scope of utility model registration request] A pump chamber 7 of an oil pump 4 driven by a motor 2 with a drive shaft 3 disposed below and an open bottom surface.
In an oil burner which is vertically partitioned into an oil reservoir chamber 7a and a rotor chamber 7b by a partition plate 8,
On the lower surface of the motor 2 facing above the oil sump chamber 7a,
A protective cover plate 26 having a concavo-convex shape having a through hole 25 through which the drive shaft 3 passes through the center thereof and tilting downward toward the through hole 25 is provided, and a protective cover plate 26 having a concave and convex shape is provided at the periphery of the through hole 25 of the protective cover plate 26. An oil burner characterized in that a hanging burring part 26a is formed, and a scattering plate 27 fixed to the drive shaft 3 is provided inside the protective cover plate 26.