JPH087802Y2 - Motor fixing structure for electric actuator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a motor fixing structure, and more particularly to fixing a small motor incorporated in an electric actuator or the like with a tape-shaped joining member. It is a fixed structure of the motor.

(Prior Art) Recently, electric vehicles have been increasingly electrified, and electric actuators are used to open and close windows of doors for lifting passengers and to open and close dampers of air conditioners for automobiles.

As this electric actuator,
Japanese Patent Publication No. 57-146,766 and the like.

As shown in FIG. 4, this electric actuator has a casing 1 as a main body composed of a bottomed case 1a and a case 1b closing the case 1a. Inside the casing 1, a motor M, a speed reducing mechanism 5 connected to the motor M to reduce the rotation of the motor M, an output shaft 6 rotated by the speed reducing mechanism 5, and a rotation controlling the rotation of the motor M. The control unit 9 is provided. The reduction mechanism 5
Is composed of a worm 2, a worm wheel 3, spur gears 4, 4, etc., and the rotation control section 9 has a brush-shaped sliding member 7 which rotates in synchronization with the rotation of the motor M, and the sliding member 7.
And a patterned conductor 8 for controlling energization of the motor M according to the rotational position of the motor M. Further, the end of the output shaft 6 projects from the case 1b.

Then, the rotation of the output shaft 6 is transmitted to the rotation link 10, and various dampers (not shown) and the like are opened and closed via the control cable 11 connected to this rotation link.

FIG. 5 shows a fixing structure of the motor M in such an electric actuator (for example, the actual construction sho 6363-11).
(See No. 7,251).

In the motor fixing structure shown in FIG. 5A, the motor M is screwed to the plate-shaped mounting bracket 12 formed on the case 1a.
13 It has been stopped.

Further, as shown in FIG. 1B, a leg-shaped mounting bracket 12 projecting from the case 1a is provided with a semi-circular fastening band 14.
The screw M is fastened with a screw 13 and the motor M is sandwiched by the fastening band 14 and the support plate 15.

Further, as shown in FIG. 7C, the O-ring is attached to the support plate 15.
The motor M is fixed by attaching 16 and fitting the convex portion 17 of the motor M to the O-ring 16.

By the way, in the electric actuator, in order to absorb the vibration of the motor M and to absorb the impact of the external force,
Is a so-called soft mount.
Japanese Patent No. 17,251 discloses a motor fixing device for softly mounting the motor M.

In this motor fixing device, as shown in FIG. 6, an engaging piece 19 is formed on the lower end of a bracket 18 to which a motor M is attached, and a hole 20 with which the engaging piece 19 engages is formed on the case 1a. It is formed on. The engaging piece 19 and the hole 20 are engaged with each other in a resilient state.

(Problems to be solved by the invention) However, in such a motor fixing structure and fixing device, work for aligning both screw holes of the motor M and the mounting brackets 12 and 18, work for mounting the fastening band 14 ,
Screw fixing work, or convex part of the motor M on the O-ring 16
The work of fitting the 17 must be done in an extremely small case 1, and the motor,
Since the reduction mechanism and the like must be incorporated, the efficiency of the assembling work is hindered.

Moreover, in the fixing structure of the motor M by the brackets 12 and 18 and the O-ring 16, since the thrust of the motor M and the radial or the dimensional accuracy of the case are influenced, In order to absorb the rattling, it is necessary to finish the mold and the like when molding the case 1a with high precision, which leads to complication of the mold manufacturing process.

The present invention has been made in view of the above-mentioned drawbacks and problems of the prior art. A motor fixing structure that achieves improvement in assembly workability by reducing the number of parts for fixing and soft mounting the motor is provided. The purpose is to provide.

[Means for Solving the Problems] (Means for Solving the Problems) The present invention for achieving the above object has a casing having a bottomed case and a case closing the case, and at least the motor in the casing. And an electric actuator provided with a speed reduction mechanism connected to the motor and an output shaft rotated by the speed reduction mechanism,
One of the cases is integrally molded with a fixing base having a concave receiving portion corresponding to the outer shape of the motor,
Between the receiving portion and the outer peripheral surface of the motor, a joining member in which an adhesive is applied to both sides of a vibration absorbing material that absorbs vibration is interposed, and the motor is fixed to the fixing base. Is a structure for fixing a motor in an electric actuator.

(Operation) According to the motor fixing structure in such an electric actuator, even if a minute protrusion or the like is formed during molding on the surface of the receiving portion of the fixing base integrally molded with the case, the base material of the joining member Because the dimensional error can be absorbed by
The mold is not required to have high precision, the mold manufacturing process is not complicated, and the manufacturing work is facilitated.

In addition, the motor is fixed to the receiving portion of the fixing base with an adhesive, and the vibration absorbing material absorbs the vibration of the motor and soft mounts.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a motor fixing structure according to the present invention, FIG. 2 is a front view of the same embodiment, and FIG. 3 is an enlarged sectional view showing a joining member of the embodiment. And the fourth
The same members as those shown in FIGS. 6 to 6 are designated by the same reference numerals, and the description thereof will be partially omitted.

The motor fixing structure shown in FIGS. 1 and 2 is a structure for simultaneously fixing the motor M and soft mounting, and a fixing base 21 for mounting the motor M is formed in the case 1a of the electric actuator. ing. In this fixed base 21,
Receiving part with a semi-circular cross section corresponding to the outer shape of the motor M
22 are formed. The motor M is fixed and soft-mounted on the fixed base 21 via a tape-shaped joining member 23.

The joining member 23 is a base material such as an acrylic foam or a polyurethane foam, which is a vibration-absorbing material having a good vibration-absorbing property.
It has a sandwich structure in which adhesives 25a and 25b are applied to both sides of 24. The base material 24 absorbs the vibration of the motor M, the impact of external force, and the like. A peeling film (not shown) is attached to the surface of each of the adhesives 25a and 25b, and when the bonding member 23 is used, the peeling film is peeled off and used.

Further, the clearance K between the motor M and the receiving portion 22 is set to be slightly smaller than the thickness of the joining member 23 in the free state and not to press the joining member 23. Further, the lengths of the joining member 23 and the fixing base 21 in the longitudinal direction are set to be substantially equal to the axial length of the motor casing 26.

 Next, the operation of this embodiment will be described.

When the motor M is attached to the fixed base 21, first, the peeling film on one adhesive 25a side is peeled off, and the joining member 23 is attached to a predetermined position of the motor casing 26. Next, the release film on the other side is peeled off, and the entire motor M is pressed while the adhesive 25b is directed toward the receiving portion 22. As a result, the motor casing 26 is pressure-bonded to the adhesive 25a and the receiving portion 22 is pressure-bonded to the adhesive 25b, and the motor M is fixed and soft-mounted on the fixing base 21 via the base material 24.

Thus, in the motor fixing structure of this embodiment, the base material 24
Since the motor M is fixed by the adhesives 25a and 25b applied in advance to the motor M, the number of parts such as the conventional screw 13 and the fastening band 14 can be reduced, and the assembling work in the narrow electric actuator is extremely easy. And it became possible to do it surely.

Further, since the motor M is soft-mounted, the vibration of the motor M and the impact of external force are absorbed by the base material 24. As a result, noise can be reduced, impact can be alleviated, and the reliability and durability of the motor M can be improved.

Furthermore, when molding, minute protrusions etc.
The joining member 23 can absorb the dimensional error by the base material 24 even if it occurs on the surface. As a result, rattling in both the thrust direction and the radial direction can be prevented, and the motor M can be securely fixed.

Moreover, since the fixing base 21 has a simple shape, it is easy to manufacture a mold for molding, and the cost of the mold can be reduced.

What has been described above is one embodiment of the present invention, and the present invention is not limited to this, and can be variously modified within the scope described in the scope of claims for utility model registration. For example, the joining member interposed between the receiving portion and the outer peripheral surface of the motor does not have to be the entire inner peripheral surface of the receiving portion as in the illustrated embodiment, and may be a part of the receiving member. The shape of the inner peripheral surface of the part is not limited to a semi-circle, but may be a shape of a bow with a smaller angle of about 45 to 50 degrees.

[Advantages of the Invention] As described above, according to the present invention, a fixing base in which a concave receiving portion corresponding to the outer shape of the motor is formed is integrally formed in one of the cases, and the receiving portion and the motor are formed. A fixing structure of a motor in an electric actuator, in which a joining member in which an adhesive is applied to both surfaces of a vibration absorbing material for absorbing vibration is interposed between the outer peripheral surface and the outer peripheral surface and the motor is fixed to the fixing base. Therefore, the following effects are achieved.

a) When the motor is supported in the case, the play in the thrust direction and the play in the radial direction of the motor is affected by the dimensional accuracy of the case. Therefore, in order to absorb this backlash, the metal mold for molding the case must be finished with high precision, which complicates the mold manufacturing process. However, as in the present invention, if the motor is fixed to the surface of the concave receiving portion of the fixed base integrally molded with the case with the elastic double-sided adhesive tape, the structure of the receiving portion can prevent backlash, and the molding Even if minute protrusions or the like occur at the time, the dimensional error can be absorbed by the base material of the joining member, high precision of the mold is not required, the mold manufacturing process is not complicated, and the manufacturing work can be performed. It will be easy.

b) The number of parts such as conventional screws and fastening bands can be reduced,
Assembly work in a small electric actuator can be performed very easily and reliably.

c) The motor is fixed to the receiving portion of the fixing base by an adhesive, and the vibration of the motor is absorbed by the vibration absorbing material to be soft-mounted.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a motor fixing structure according to the present invention, FIG. 2 is a front view of the same embodiment, and FIG.
FIG. 4 is an exploded perspective view showing a general electric actuator, and FIGS. 5 (A) to 5 (C) are perspective views showing a fixing structure of a conventional motor. , FIG. 6 is a perspective view showing a conventional motor fixing device. 1 ... Casing, 1a, 1b ... Case, 5 ... Reduction mechanism, 6 ... Output shaft, 21 ... Fixed base, 22 ... Receiving part, 23 ...
… Joining member, 24 …… Base material (vibration absorbing material), 25a, 25b…
… Adhesive, M… Motor.

Claims (1)

[Scope of utility model registration request] 1. A bottomed case (1a) and this case (1a)
A casing (1) that closes the casing (1b), and at least a motor (M), a reduction mechanism (5) connected to the motor (M), and the reduction gear In an electric actuator provided with an output shaft (6) rotated by a mechanism (5), one of the cases (1a, 1b) has a concave receiving portion (corresponding to the outer shape of the motor (M) ( A fixing base (21) on which the 22) is formed is integrally molded, and an adhesive is applied to both sides of a vibration absorbing material (24) that absorbs vibration between the receiving portion (22) and the outer peripheral surface of the motor (M). A motor fixing structure for an electric actuator, characterized in that a motor (M) is fixed to the fixing base (21) with a joining member (23) coated with (25a, 25b) interposed.