JP3201939B2 - Actuator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor driven actuator.

[0002]

2. Description of the Related Art Conventionally, motor driven actuators have been used everywhere. The actuator is a motor,
It comprises a speed reduction mechanism and an output mechanism, includes a clutch mechanism according to the application, and stores each of these mechanisms in a case divided into two. When the actuator is used in a place where water such as rainwater splashes, a waterproof structure is provided to prevent water from entering the inside of the actuator. For example, Japanese Unexamined Patent Publication No. 2-91376 discloses an actuator for operating a lock device incorporated in a door of an automobile to a lock or unlock position. In Japanese Patent Application Laid-Open No. 2-91376, FIGS.
A groove 105 is formed in one mating surface 103 of the two divided cases 101 and 102 as described above, an O-ring 106 is inserted into the groove 105, and an O-ring is formed on the other mating surface 104 of the cases 101 and 102. It compresses to prevent water from entering the case. It also discloses that the mating surfaces of the cases 101 and 102 are bonded or welded to improve the sealing property.

[0003]

The conventional technique disclosed in Japanese Patent Laid-Open No.
In the case of 91376, when the plane shape of the mating surface of the case draws a complicated curve, even if an O-ring is inserted into the groove provided in the mating surface, the O-ring itself jumps out of the groove by the restoring force,
In order to solve the extremely poor workability, a grip portion 1 having a diameter slightly larger than the groove width is provided in a part of the O-ring 106.
07 is provided to press the grip portion 107 into a predetermined position of the groove to prevent the O-ring from jumping out. However, in Japanese Patent Application Laid-Open No. 2-91376, two cases 10 are used for the O-ring grip portion and the portion other than the grip portion.
There is a difference in the compression amount when combining 1,102,
When used for a long period of time, there is a problem that the grip portion having a large compression amount is settled and the sealing performance is deteriorated. The present invention seeks to solve the aforementioned problems.

[0004]

Therefore SUMMARY OF THE INVENTION The present invention is Ueke
Motor and deceleration inside the outer frame consisting of the base and lower case
Built-in machine groove, output machine groove, the upper case and the lower case
Is an actuator connected to each other via an O-ring
In the above, the O-ring is compressed in the lower case.
Forming a groove to be mounted without
The O-ring forms a holding portion on which the O-ring is compressed and mounted.
The above case has a contact with the O-ring attached to the groove.
The O-ring attached to the projecting part and the holding part
Forming a holding corresponding portion to be in contact with the groove and the protrusion;
The relationship and the relationship between the holding unit and the holding corresponding unit are as described above.
Compression of the O-ring compressed between the groove and the protrusion
Before being compressed between the holding part and the holding counterpart
An o-ring is configured so that the amount of compression becomes equal to that of the O-ring.
It is a couture .

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Is an actuator, which forms an outer frame body with the upper case 2 and the lower case 3, and has a motor 4, a reduction mechanism 5, a clutch mechanism 6, and an output mechanism 7 built in the outer frame body, and an output member 8.
And the electric wiring cord 9 is out of the case.
The motor 4 is fixed to the substrate 10 and its output shaft has a small gear 1
1 is attached, and meshes with a large gear 13 supported on a shaft 12 fixed to the substrate 10. A clutch mechanism 6 is also attached to the shaft 12, and a gear 15 is formed on a clutch drum 14, which is a final output member of the clutch mechanism 6.

[0006] One of the shafts 17 and 18 formed concentrically on the front and back of the sector gear 16 is inserted into a hole 19 of the substrate 10, and the other is inserted into a hole 21 of the sub-substrate 20, and the sector gear 16 is rotatably mounted. A gear 22 is provided at one end of the sector gear 16.
Are formed and mesh with the gear 15 of the clutch drum 14. The sub-board 20 is fixed by the shaft 12. One shaft 17 of the center gear 16 projects from the upper case via a seal 23, and fixes the output member 8 to the projecting portion.

The substrate 10 is attached to one of the upper case 2 and the lower case 3 by a plurality of screw screws 24. The upper case 2 and the lower case 3 are joined by respective mating surfaces 25 and 26 and fixed by screw screws 27. Mating surface 2 of upper case 2
5 or groove 28 in one of the mating surfaces 26 of the lower case.
And a protrusion 29 is provided on one of the other. Mating surface 2
Reference numerals 5 and 26 are provided on the entire outer periphery of the upper case 2 and the lower case 3 excluding a portion for taking out the electric wiring cord 9 to the outside. The groove 28 has a width larger than the diameter of the O-ring 30 and a depth of O
-Make the diameter of the ring 30 substantially the same. A plurality of holding portions 31 are provided in the groove 28, and the width of the holding portion 31 is smaller than the width of the groove 28 so that when the O-ring is inserted, it is somewhat compressed in the width direction. The depth of the holding portion 31 is made larger than the depth of the groove 28 so that the O-ring 30 does not project much from the mating surface when the O-ring 30 is inserted. The groove 28 and the holding part 31 are connected by a gentle line at the connecting part 32.

The protrusion 29 is formed corresponding to the groove 28, and the groove 2
The width of the O-ring 30 is set to be smaller than the width of the O-ring 30 when the upper case 2 and the lower case 3 are combined. The protrusion 29 is provided with a holding portion corresponding portion 33 at a position corresponding to the holding portion 31 of the groove 28.
The width of 3 is smaller than the width of the holding portion 31 so that the O-ring 30 can be compressed when the upper case 2 and the lower case 3 are combined. The connecting portion 34 between the protrusion 29 and the holding portion corresponding portion 33 is connected by a gentle line. O- in groove 28 and protrusion 29
The amount by which the ring 30 is compressed, the amount by which the O-ring 30 is compressed by the holding portion 31 and the holding portion corresponding portion 33, and the connection portion 3
The amount by which the O-ring 30 is compressed at 2, 34 is approximately the same.

The holding portion 31 of the groove 28 is provided at a bent portion of the groove (a bent portion in a plane and a bent portion in a height direction) or in the vicinity of the bent portion. The outlet 35 of the electric wiring cord 9 provided in the upper case 2 and / or the lower case 3 is sealed with a filler such as resin or rubber as required. The clutch mechanism 6 can be omitted depending on the use of the actuator.

Next, the operation will be described. The motor 4, the speed reduction mechanism 5, the clutch mechanism 6, and the output mechanism 7 are all mounted on the board 10, and the board 10 is fixed to one of the upper case 2 or the lower case 3, and the O-ring 30 is inserted into the groove 28, and When the output member 8 is attached, the case is completed when the output member 8 is attached. When the motor 4 is not operating, the output member 8 is disconnected from the motor 4 and the output member 8 can be manually rotated. When the motor 4 is operated, the speed reduction mechanism 5,
The output member 8 rotates via the clutch mechanism 6 and the output mechanism 7. When the power supply to the motor 4 is stopped, the connection between the output member 8 and the motor 4 is disconnected by the clutch mechanism 6.

[0011]

When the O-ring is inserted into the groove provided in either the upper case or the lower case, the O-ring is held by the plurality of holding portions and does not protrude from the groove.
-Even if the positional relationship between the ring and the groove is displaced, there is no problem in the sealing performance and the assembly, and the assembly is easy. Also, since the amount of compression of the O-ring is made substantially constant in the groove and the holding portion, the O-ring does not cause local settling. Further, the O-ring may have a constant cross-sectional shape, does not require special work, and is inexpensive.

[Brief description of the drawings]

FIG. 1 is a plan view of an actuator.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a diagram showing the relationship between grooves and protrusions.

FIG. 5 is a plan view of a groove.

FIG. 6 is a sectional view taken along the line CC of FIG. 5;

FIG. 7 is a plan view of a protrusion.

FIG. 8 is a sectional view taken along the line DD of FIG. 7;

FIG. 9 is a diagram illustrating a relationship between a holding unit and a holding unit corresponding unit.

FIG. 10 is an assembly diagram of a groove and a protrusion.

FIG. 11 is a diagram illustrating a relationship between a holding unit and a holding unit corresponding unit.

FIG. 12 is a diagram of a known example.

FIG. 13 is a diagram of a known example.

[Explanation of symbols]

1 ... actuator, 2 ... upper case, 3 ... lower case, 4
... Motor, 5 ... Reduction mechanism, 6 ... Clutch mechanism, 7 ... Output mechanism, 8 ... Output member, 9 ... Electrical wiring cord, 10 ... Board, 11 ... Small gear, 12 ... Shaft, 13 ... Large gear, 14 ... Clutch drum, 15 ... gear, 16 ... sector gear, 17
... shaft, 18 ... shaft, 19 ... hole, 20 ... sub-substrate, 21 ... hole,
22 ... gear, 23 ... seal, 24 ... screw screw, 25 ... mating surface, 26 ... mating surface, 27 ... screw screw, 28 ... groove, 29
... Protrusion, 30 ... O-ring, 31 ... holding part, 32 ... connecting part, 33 ... holding part corresponding part, 34 ... connecting part, 35 ... outlet, 101 ... case, 102 ... case, 103 ... 104: mating surface, 105: groove, 106: O-ring, 107: grip part.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02K 5/10 F16J 15/10 H02K 7/116

Claims (2)

(57) [Claims] 1. An outer frame body comprising an upper case and a lower case.
Built-in motor, reduction gear groove and output gear groove inside,
And the lower case are joined to each other via an O-ring.
In the actuator, the lower case has the O
-Forming a groove in which the ring is mounted without compression
The O-ring is compressed and mounted in a part of the groove.
A holding portion is formed, and the upper case is mounted in the groove.
The protrusion attached to the O-ring and the holder
Forming a holding corresponding portion that contacts the O-ring,
Relationship between the groove and the protrusion, and the holding portion and the holding correspondence
The relationship between the groove and the projection before being compressed
The O-ring compression amount, the holding portion, the holding corresponding portion,
The compression amount of the O-ring compressed between
Actuator configured to work. 2. The device according to claim 1, wherein the groove is formed by
Groove width greater than the diameter of the O-ring and a groove equal to the diameter of the O-ring
And a shape having a depth, wherein the holding portion is the groove of the groove.
Holding part width smaller than width and holding deeper than the groove depth of the groove
Actuator that has a shape with a depth.