JP2000262000A - Coupling structure between submerged speed reduction part casing and motor casing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize coupling structure between a speed reduction part casing and a motor casing which enables operation without affecting parts, etc., even if the speed reduction casing and the motor casing (a driver) are submerged. SOLUTION: A motor casing 107 is made a completely waterproof type which does not allow the penetration of water, and a speed reduction part casing 110 is made a semi-waterproof type which allows some amount of penetration of water, and also these speed reduction part casing 110 and motor casing 107 are joined with each other through a junction plate 187 which as a through- hole 184 at the center, and a cylindrical coupling body 150 where bottomed holes 186a and 186b are made from the side of both ends of itself is incorporated through a seal member 188 into the through-hole 184 of the junction plate 182, and also an output shaft 122 on the side of the motor casing and an input shaft 130 on the side of the speed reduction part casing are coupled to the sections of the several bottomed holes 186a and 186b of the coupling body 150.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flooded type including a motor, a reduction unit for reducing the rotation of the motor, a motor casing for housing the motor, and a reduction unit casing for housing the reduction unit. The present invention relates to a connection structure between a reduction gear casing and a motor casing.

[0002]

2. Description of the Related Art A motor and a speed reducer (hereinafter simply referred to as a driving device) are used outdoors or in places using water (for example,
When used in water treatment facilities such as pump stations, waterproofing measures are required.

For example, a water treatment facility is generally located outdoors, and an area where a driving device is installed or the entire water treatment facility may be temporarily submerged due to heavy rain or a typhoon.

[0004] However, there are cases where it is necessary to operate the driving device even when the vehicle is submerged.

Therefore, even if the driving device is submerged, it is necessary to prevent water from entering the inside. In particular, if the electric components are not completely waterproofed, there is a risk that the function of the driving device may be stopped by the ingress of water, or a short circuit or a failure may occur.

[0006] The driving device is mainly composed of a motor section and a reduction section, and outputs the rotation of the motor from an output shaft.

The motor section includes a motor, a motor cover (casing) for housing the motor, a terminal box for a power supply port for supplying power to the motor, and an electric power supply for protecting the motor from failure due to overload. And a torque limiter (limit switch) that can shut off the current.

[0008] The speed reducer is internally constituted by gears, shafts and the like for reducing the rotation transmitted from the motor, and the outside is constituted by a speed reducer casing accommodating the gears, shaft and the like.

As described above, the motor section is provided with electric components such as a motor, a terminal box, and a torque limiter. As is well known, these electric parts are parts that dislike contact with water. Therefore, a dedicated casing (cover) is attached to each of the terminal box and the torque limiter, and measures are taken to prevent water from entering the cover by caulking or packing at the joint of the casing.

The joint between the motor and the deceleration unit is similarly subjected to caulking, an O-ring is used for a mating surface that comes into contact with the outside air, and a plurality of pressure-resistant seals are used where a pressure is applied. Thereby, waterproof measures are taken to prevent water from entering each cover. In this way, measures were taken to temporarily withstand submersion.

[0011]

However, even if such a waterproof measure is taken, water may enter the casing, and the waterproof measure is not always sufficient.

For example, it is necessary to connect a counterpart machine to the output shaft. In particular, when the output shaft is of a hollow shaft type, the waterproofness near the output shaft and the state where the durability of the waterproofing measures are weak are considered. Had become. In other words, it was difficult to completely waterproof the reduction gear.

On the other hand, inside the respective casings of the speed reduction unit and the motor unit, a motor shaft of the motor and an input shaft of the speed reduction unit are connected in order to transmit rotation from the motor. It is not in a partitioned state.

Therefore, in the event that water enters the inside of the reduction section, there is a problem that water naturally flows from the reduction section to the motor section. However, as described above, the motor unit is provided with electric components such as a motor, a terminal box, and a torque limiter,
If water is brought into contact with these electric components, there is a problem that they do not function properly.

Further, lubricating oil is supplied in the reduction gear casing to lubricate a plurality of kinds of gears housed in the casing. As described above, there is a possibility that lubricating oil may flow from the casing of the reduction unit to the motor cover unless the interior of the reduction unit and the motor unit is partitioned with particular consideration.

The present invention has been made in view of such a conventional problem, and has been developed in an emergency (heavy rain, typhoon, etc.).
Even if the area where the drive unit (reduction unit casing and motor casing) is installed, or the entire processing facility where the drive unit is installed, is temporarily submerged by flooding, it can be operable. It is an object of the present invention to provide a connecting portion structure between a reduction gear casing of a mold and a motor casing.

[0017]

According to a first aspect of the present invention, there is provided a motor, a deceleration unit for decelerating the rotation of the motor,
In a connection structure of a flooded speed reduction unit casing and a motor casing including a motor casing that houses the motor and a speed reduction unit casing that houses the speed reduction unit, the speed reduction unit casing and the motor casing are penetrated. A cylindrical coupling body having bottomed holes formed at both ends of the joining plate through a sealing member, and joining the coupling plate into the through-hole of the joining plate via a sealing member. The above object is achieved by connecting an output shaft on the motor casing side and an input shaft on the reduction unit casing side to the respective bottomed holes of the ring body.

The term "joining plate" as used herein means a waterproof member provided on a surface (joining surface) where the speed reduction portion casing and the motor casing face each other. By installing this joining plate, it is possible to prevent water from entering from the outside at the connection portion between the reduction gear casing and the motor casing.

A through-hole is provided in the joining plate, and a coupling body is incorporated into the through-hole via a sealing member, so that a speed reduction portion casing and a motor are provided between the outside of the coupling body and the joining plate. The flow of water between the casings can be blocked.

The coupling body is provided with “bottomed” holes from the motor side and the reduction gear side, respectively. The respective bottomed holes have an output shaft on the motor casing side and a reduction section casing side. By connecting the input shafts of
Water can be prevented from flowing back and forth between the speed reduction unit casing and the motor casing via the (inside) the coupling body.

Therefore, for example, even when water enters the reduction gear casing, it is possible to prevent the water that has entered the reduction gear casing from flowing into the motor casing.

According to a second aspect of the present invention, in the first aspect, the motor casing is of a completely waterproof type that does not allow water to enter, and the speed reduction unit casing is of a semi-waterproof type. By incorporating a limit switch mechanism capable of electrically stopping the operation of the motor, the above-described problem is also solved.

Claim 2 shows an example of a specific electric component housed in the motor casing in claim 1.

The limit switch mechanism according to the second aspect is a part that does not want to come into contact with water. According to claim 2, since the motor casing is of a completely waterproof type, by contacting the motor casing with these electric components, contact with water can be eliminated. The function of the component can be fully exhibited.

It should be noted that the semi-waterproof type here is not a complete prevention type, but allows some water to enter.
At this time, even if water invades, it is composed of components that function normally.

According to a third aspect of the present invention, the above-mentioned problem is similarly solved by filling the oil for lubricating the gears in the speed reduction portion casing in the speed reduction portion casing in the first aspect. Things.

As described above, by filling the lubricating oil in the reduction gear casing, each element of the reduction gear can be lubricated and water can be prevented from entering the reduction gear casing. Even in this case, since the flow of water between the reduction gear casing and the motor casing is blocked, the oil filled in the reduction gear casing does not flow into the motor casing.

[0028]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a sectional view showing the internal structure of the reduction gear casing, the motor casing, and the connecting portion thereof according to the present invention. FIG. 2 is a partially enlarged view of a portion II in FIG. FIG. 3 is a sectional view taken along line III-III in FIG. 1, and FIG. 4 is a side view of FIG. 1 as viewed from the left side of the drawing.

FIGS. 10 and 11 are an external view as seen from the front of FIG. 1 and an external view as viewed from above. FIGS. 12 and 13 show only the inside of the motor casing of FIGS. 10 and 11, respectively.

First, this embodiment will be described with reference to FIG.

This embodiment is mainly constituted by a speed reduction portion R, a motor portion M, and a connection portion S thereof (hereinafter, referred to as a connection portion S).
This is simply referred to as a driving device G).

The motor section M of the driving device G is mainly composed of a motor M1 and a front-stage reduction section MR1 for reducing the rotation of the motor M1, and the outside is covered by a motor casing 107.

The motor M1 is driven by a motor shaft 120, which is a rotation shaft of the motor M1, through the front-stage reduction unit MR1.
To transmit rotation. In the present embodiment, the pre-stage reduction unit MR1 employs a speed reducer having an internally meshing planetary gear structure, where the first-stage reduction is performed.

A terminal box 106 for receiving electric power is supplied to the motor M1 of the motor section M, and electric power is supplied to the pre-stage deceleration section MR1 to protect the motor M1 from failure when the motor M1 is overloaded. A shutoff torque limiter (limit switch) mechanism 124 (described in detail later) is provided.

The speed reducing portion R has a gear mechanism for reducing the speed of rotation transmitted from the motor portion M (described later).
And the outside is constituted by a reduction gear casing 110 that accommodates the gear mechanism.

Reference numerals 192 and 194 denote a cable hole for supplying electric power to the torque limiter 124 and a cable hole for supplying electric power to the motor M1, respectively. These holes are provided with cap tire cords according to the well-known JIS standard F8801 to prevent water from entering there. Reference numeral 196 denotes a hole 196 for confirming whether or not water has entered the motor casing 107. Normally, the stopper 200 is closed, and no water enters from here.

FIG. 2 is an enlarged view of a portion II in FIG.
And the pre-stage reduction unit MR1 will be described.

Eccentric bodies 152a and 152b are fitted to the motor shaft 120 with a predetermined phase difference (180 ° in this example). The eccentric bodies 152a and 152b are integrated. Each eccentric body 152a, 152b has a bearing 1
The two external gears 156a, 156
6b is attached. These external gears 156a, 156
b, a plurality of inner roller holes 168 are provided.
0 and the inner roller 158 are fitted.

On the outer periphery of the external gears 156a and 156b, external teeth 162 such as a trochoid tooth shape and an arc tooth shape are provided. The external teeth 162 are internally meshed with an internal gear 166 fixed to the free frame 172.

When the motor shaft 120 makes one rotation, the eccentric body 15
2a and 152b make one rotation. These eccentric bodies 152a, 15
With one rotation of 2b, the external gears 156a and 156b also try to perform oscillating rotation around the motor shaft 120, but since their free rotation is restricted by the internal gear 166, the external gears 156a and 156b Thus, almost only swinging is performed while inscribed in the internal gear 166. Note that reference numeral 170 denotes a fixed frame connecting the gantry 164. The free frame 172 is rotatable within the fixed frame 170.

The rotation of the external gears 156a, 156b is absorbed by the gap between the inner roller hole 168 and the inner pin 160, and only the rotation component is transmitted to the first output shaft 122 via the inner pin 160. Is transmitted.

A first output shaft (output shaft on the motor casing side) 122 for outputting reduced rotation from the reduction unit MR1.
Is connected to the coupling body 150. The details of the connection between the first output shaft (output shaft on the motor casing side) 122 and the coupling body 150 will be described later.

Next, returning to FIG. 1, the speed reduction section R will be described.

An input shaft 130 is connected to the side of the speed reduction portion R of the coupling body 150. The input shaft 130
Are formed integrally with the pinion shaft 132, and the bearing 1
36 rotatably supported.

The pinion shaft 132 is orthogonally engaged with a first gear 138 incorporated in the first shaft 142. Also, the first shaft 142 rotated by the pinion shaft 132
Transmits the rotation to the third gear 142 incorporated in the second output shaft 102 via the second gear 140 incorporated in the first shaft 142.

The second output shaft 102 is of a hollow shaft type, and a rotation input shaft (not shown) of a mating member is connected to the second output shaft 102.

As described above, in the present embodiment, the first-stage reduction is performed by the reduction unit MR1 in the motor casing 107, and the second-stage reduction is performed by the orthogonal gear reducer in the reduction unit casing 110. It employs a two-stage deceleration structure to execute.

Reference numerals 190 and 198 denote oil supply holes for supplying oil into the speed reduction unit casing 110 and oil discharge holes for discharging oil, respectively. These holes are in a closed state except when supplying oil and when draining oil.

Next, the limit switch mechanism (torque limiter) 124 installed in the reduction section MR1 in the motor casing 107 will be described.

FIG. 5 shows the torque limiter 12 in FIG.
FIG. 5 is an enlarged view of a section viewed from the direction indicated by arrow V in FIG. 4.

FIG. 6 is a sectional view taken along the line VI-VI of FIG.

In FIG. 5, reference numeral 176 denotes a dock bar attached to the free frame 172 (see FIG. 2). When the second output shaft 102 is under a steady load, the dock rod 176 is placed at a fixed position by the force of a coil spring 174 set in advance. When a load equal to or more than a preset torque is generated on the second output shaft 102, the free frame 172
, And the dock rod 176 is rotated by the coil spring 17.
Press 4 to activate the torque limiter 124. Specifically, the tip end 180A of the contact circuit 180 is pushed upward in FIG. 6, and the power of the motor M1 is turned off by cutting off a contact (not shown) in the contact circuit 180.

Next, the motor section M which is the main part of the present invention
The structure of the connecting portion S between the (motor casing 107) and the reduction portion R (the reduction portion casing 110) and the waterproof structure of the motor casing 107 and the reduction portion casing 110 will be described.

Before describing the structure of the connecting portion S, the importance of waterproof measures at the connecting portion of the connecting portion S will be briefly described.

As described with reference to FIG. 1, the terminal box 10 of the power supply port of the motor M1 is provided in the motor casing 107.
6. An electric component such as a torque limiter 124 for detecting an overload of the motor M1 and electrically stopping the operation of the motor is provided. As is well known, such electrical components will not function properly if they come into contact with water.

Therefore, in the present embodiment, the torque limiter 124 and the terminal box 10 are provided in the motor casing 107.
6, while taking measures to make the motor casing 107 a completely waterproof type that does not allow water to enter.

Originally, it is ideal that both the motor casing 107 and the reduction gear casing 110 are completely waterproof.
As described in "Problems to be solved by the invention",
Since the reduction unit casing 110 has the second output shaft 102 (connected to a mating member (not shown)),
There is a current situation that the waterproofing treatment of the output shaft portion is weakened and is likely to be insufficient.

Conventionally, if water enters the speed reduction unit casing 110, water flows into the motor casing 107 unless a special partitioning process is performed inside the motor casing 107 and the speed reduction unit casing R. There was a possibility.

Therefore, in this embodiment, the connecting portion structure S between the speed reduction portion casing and the motor casing has the following structure.

FIG. 7 is an enlarged view of the connecting portion structure S between the speed reduction portion casing and the motor casing in FIG.

FIGS. 8 and 9 are sectional views taken along lines VIII-VIII and IX-IX in FIG. 1, respectively.

As shown in FIG. 7, in the present embodiment, when connecting the casings of the reduction gear casing 110 and the motor casing 107 to each other, a joining plate 182 having a through hole 184 in the center is sandwiched between the casing and the joining plate 182. It is fixed to both casings by bolts 190a and 190b. Then, the bottomed holes 186a, 1b are inserted into the through holes 184 of the joining plate 182 from both ends 110a, 107a thereof.
The cylindrical coupling body 150 on which 86b is formed is
The coupling member 150 is assembled through a sealing member 188, and the bottomed holes 186a and 186b of the coupling body 150 are respectively provided.
A first output shaft 122 (corresponding to an “output shaft” in the first embodiment) 122 on the motor casing 107 side and an input shaft 130 on the speed reduction unit casing 110 side are connected to the keys 190a, 19
0b.

By doing so, the bottomed hole 186a,
Since the cylindrical coupling body 150 having 186b is interposed between the input shaft 130 on the reduction casing 110 and the first output shaft 122 on the motor casing 107, the bottom 192 of the bottomed holes 186a and 186b is provided. With this arrangement, it is possible to completely eliminate the flow of water between the two, and since the seal member 188 is incorporated between the outer periphery of the coupling body 150 and the joining plate 182, the flow of water between the casings from this gap is also completely completed. Can be eliminated.

Therefore, even if water enters the speed reduction unit casing 110, water does not flow into the motor casing 107 housing the electric components, and the motor casing 107 Fully waterproof can be maintained.

Therefore, even if the entire driving device G is immersed in water, it can be operated without any trouble.

The seal member 188 may be, for example, an oil seal. In addition, it is not particularly limited to this.

On the other hand, as described above, the speed reduction unit casing 110 is constituted by the shaft, the gears, and the like, so that it can function even if a small amount of water enters even temporarily. Therefore, it is a semi-waterproof type.

Further, since the reduction portion R is constituted by the gears, shafts, etc., oil for lubricating them is required.

Therefore, in the present embodiment, the inside of the reduction gear casing 110 is filled with oil. By doing so, it is possible to prevent water from entering from outside the reduction unit casing 110 and also prevent water from easily entering the reduction unit casing 110.

Further, since the inside of the reduction casing 110 and the interior of the motor casing 107 are completely separated from each other to prevent water from flowing between the casings, the lubricating oil fills the reduction casing 110. Even in this state, it does not flow from the speed reduction unit casing 110 into the motor casing 107.

Therefore, the stable operation of the motor M1 and the function of the original electric parts can be exhibited.

In the present embodiment, the first-stage reduction is performed by the intermediate reduction unit MR1 having the internal meshing planetary gear structure in the motor casing, and the second reduction is performed by the orthogonal gear reduction unit R in the reduction unit casing 110. Although a two-stage type deceleration structure for decelerating the eyes is used, the present invention is not particularly limited to this.

The advantage of performing the first-stage deceleration in the motor casing in the present embodiment is that the seal member 188 is employed on the outer periphery of the coupling body 150, so that the first-stage deceleration is performed in the motor casing 107. When the eye is decelerated and brought into contact with the seal member 188 in a state where the coupling body 150 is sufficiently decelerated, the seal member 1
88 can be prevented from being worn early.

[0075]

According to the present invention as described above,
Even if the reduction gear casing and the motor casing (drive device) are submerged, it can be operated without affecting components and the like.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an entire internal structure of a reduction gear casing and a motor casing according to an embodiment of the present invention.

FIG. 2 is a partially enlarged view of a part II in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a side view of FIG. 1 as viewed from the left side of the drawing.

FIG. 5 is a cross-sectional view as viewed from a direction indicated by an arrow V in FIG. 1;

6 is a sectional view taken along the line VI-VI in FIG.

FIG. 7 is an enlarged view of a connecting portion structure S in FIG. 1;

FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 1;

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is an external view as viewed from the front of the page of FIG. 1;

11 is an external view of FIG. 1 as viewed from above.

12 is a diagram showing the inside of only the motor casing side of FIG. 10;

FIG. 13 is a view showing the inside of only the motor casing side of FIG. 11;

[Explanation of symbols]

 102 second output shaft 104 limit switch cover 106 terminal box 108 motor cover 110 reduction gear casing 107 motor casing 108 motor casing 110 reduction gear casing 120 motor shaft 122 first output shaft 124 torque Limiter (limit switch) 130 ... input shaft 132 ... pinion shaft 150 ... coupling body 156a, 156b ... external gear 160 ... internal pin 166 ... internal gear 182 ... joining plate 184 ... through hole 186a, 186b ... bottomed hole 188 ... Seal member M1 ... Motor

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3J063 AA31 AC01 BB02 CA01 CB41 CB58 CC35 CD46 5H605 AA02 BB05 CC01 CC03 CC05 CC10 DD17 5H607 AA05 BB01 CC01 CC03 DD03 DD07 DD08 DD09 DD17 DD19 EE21 EE36

Claims (3)

[Claims] 1. A submergence type reduction unit casing and a motor casing comprising a motor, a reduction unit for reducing the rotation of the motor, a motor casing for storing the motor, and a reduction unit casing for storing the reduction unit. In the connecting portion structure, the deceleration portion casing and the motor casing are joined via a joining plate having a through hole, and a bottomed hole is formed in the through hole of the joining plate from both ends thereof. The assembled cylindrical coupling body is inserted via a sealing member, and the output shaft on the motor casing side and the input shaft on the reduction unit casing side are respectively connected to the respective bottomed holes of the coupling body. The structure of the connecting portion between the flooded speed reduction unit casing and the motor casing. 2. The motor casing according to claim 1, wherein the motor casing is of a completely waterproof type that does not allow water to enter, and the speed reduction unit casing is of a semi-waterproof type. A connection structure between a flooded speed reduction unit casing and a motor casing, wherein a limit switch mechanism that can be stopped is incorporated. 3. A connection part between a submersion type reduction gear casing and a motor casing according to claim 1, wherein the reduction gear casing is filled with oil for lubricating gears in the reduction gear casing. Construction.