JPS595611Y2 - Drive motor unit mounting structure - Google Patents

Description

[Detailed Description of the Invention] The present invention is applicable to a drive motor unit, such as a heater unit of an automobile. This invention relates to a mounting structure for a drive motor unit that switches and operates a knitted damper.

Recently, in automobiles, various control levers that were previously operated manually are now operated using drive motors, solenoids, etc.
There is a tendency to simplify operations.

For example, in the case of heaters (including air conditioners), each mode (DEF, HEAT, VENT, etc.) of the heater unit was conventionally controlled by operating each switching damper using a manual lever.

This mode control is attempted to be performed by using a motor, converting the rotational force of the motor into reciprocating motion via a deceleration mechanism, and operating operating levers connected to each damper.

For example, as an example is shown in FIG. 1, a drive motor unit M consisting of a drive motor 2, a speed reduction mechanism 3 (not shown), and a case body 4 housing the speed reduction mechanism is attached to the heater unit 1, Levers 7 and 8 for operating the dampers 5 and 6 of the heater unit and the speed reduction mechanism 3 are connected by a rod 9 to open and close the dampers 5 and 6.

The lever 8 is operated in conjunction with the lever 7 by sliding a roller 7a protruding from the lever 7 through a guide groove 8a formed in the lever 8.

However, in such a structure, if the drive motor unit M is directly fixed to the heater unit 1, the operating noise of the drive motor 2 will be directly transmitted to the heater unit 1, and since the heater unit 1 is hollow, the operating noise will be reduced. There is a problem in that the noise is greatly amplified and propagated into the vehicle interior, contributing to noise.

Incidentally, the above structure is known from Japanese Utility Model Application Publication No. 53-31750.

On the other hand, in order to solve the above problem, if the motor unit M is attached to the heater unit 1 through an elastic body such as rubber, the motor unit M will not move against the heater unit 1 due to the reaction force caused by the operation of the drive motor 2. There is a problem in that the levers 7 and 8 are displaced due to the elastic deformation of the elastic body, resulting in errors in the stopping positions of the levers 7 and 8.

Particularly when there are many stop positions within a limited stroke, such as mode control of a heater, errors in the stop positions greatly affect mode control.

In view of the above points, the present invention provides a mount structure that reduces transmission of vibration from the drive motor unit to the base body (heater unit) and restricts movement of the drive motor unit relative to the base body to a minimum. It is something.

The present invention will be explained below based on the embodiments shown in FIGS. 2 to 5.

Figure 2 shows the drive motor unit shown in Figure 1.
This is an external view of the case body 4, where 2 is the drive motor.
The case body 4 includes a deceleration mechanism 3 consisting of a worm gear, a worm wheel, and a pinion.
(not shown) is built in, and the rack 10 is reciprocated by the speed reduction mechanism 3, and the rack 10 and the operated lever (lever 7) are connected by a rod 9.

As shown in FIG. 3, on the bottom surface 4a of the case body 4, a boss 4b for supporting the worm wheel and pinion shaft 11 of the speed reduction mechanism 3 is projected from approximately the center thereof, and a boss 4b is formed around the boss. It has three protruding legs.

Note that 4d is a rib that connects the boss 4b and the leg 4C.

As shown in FIG. 4, a plate-shaped elastic body 12 made of rubber or the like is fitted to the bottom of the case body 4, and a fixing plate 14 is fixed to the tip of the leg 4C with a screw 13, and the case body The structure is such that the elastic body 12 is supported by the bottom surface 4a of the elastic body 4.

As shown in FIG. 3, the elastic body 12 includes a through hole 12a into which the boss 4b of the case body 4 is loosely inserted, a groove 12b into which the rib 4d is inserted, and a through hole 12 into which the leg 4C is fitted.
C is formed, and a fitting groove 12f is formed around the entire circumference of the peripheral wall 12e.

Note that the elastic body 12 has through holes 12 C, 12 C,
The elastic body 12 has a shape substantially similar to a triangle connecting 12C, and is arranged so that the through hole 12C is located near the outer periphery of the elastic body 12.

Fitting groove 12 provided in the outer peripheral wall 12e of the elastic body 12
f has a base body (heater unit 1) as shown in Fig. 4.
) A peripheral edge 16 of a fitting hole 16a (see Fig. 3) formed in a mounting bracket 16 fixed with a screw 15 to
b is fitted, and the drive motor unit M is attached to the base body (heater unit 1) via the elastic body 12.

Note that FIG. 5 shows a state in which the elastic body 12 and the mounting brackets 1 to 16 are attached to the drive motor unit (M) (with the fixing plate 14 removed), viewed from below.

As described above, in the mount structure according to the present invention, the case body 4
At least three legs 4C are formed around the boss 4b which protrudes from the bottom surface 4a of the
The elastic body 12 is formed with a through hole 12a into which the leg 4C is fitted, and a through hole 12C through which the leg 4C passes near the outer periphery. The peripheral edge 16 of the fitting hole 16a of the mounting bracket 16 fixed to the base body 1 in the fitting groove 12f formed in the outer peripheral wall 12e.
Since the drive motor unit is attached to the base body through an elastic body, vibrations caused by the operation of the motor can be damped by the elastic body.

In particular, the vibration energy of the boss is large because it supports the deceleration mechanism, but in the mount structure of the present invention, the distance between the boss and the mounting bracket (indicated by H in Figure 5) is such that the boss penetrates almost the center of the elastic body. Due to the holes provided, it is large enough to sufficiently attenuate vibration energy, while also reducing the distance between the legs and the mounting bracket (h in Figure 5).
) are shorter because the leg through holes are provided near the outer periphery of the elastic body, so the amount of elastic deformation of the elastic body is small, and lateral movement due to reaction force from drive motor operation is restricted and stopped. This allows positioning errors to be minimized.

As described above, the mounting structure of the present invention not only prevents vibration by simply attaching the drive motor unit to the base body via an elastic body, but also minimizes displacement due to the reaction force of motor operation, so that the heater This is particularly effective for mode control, which requires a large number of stopping positions within a limited stroke.

Furthermore, since the structure includes at least three legs, lateral movement in all directions can be restricted.

In addition, in this invention, the mounting bracket is fixed to the base body,
Although the drive motor unit is attached to the mounting bracket via an elastic body, in some cases, the mounting bracket may be eliminated and a fitting hole for fitting the elastic body directly to the base body may be formed. It may be possible.

[Brief explanation of drawings]

Fig. 1 is an external view showing the drive motor unit attached to the heater unit, Fig. 2 is an external view of the drive motor unit viewed from below, Fig. 3 is an exploded perspective view showing the structure of the mount, and Fig. 4 The figure is a partial cross-sectional view showing the mount structure (
FIG. 5 is a downward external view showing a state in which the elastic plate and the mounting bracket are attached to the drive motor unit. 1... Base body (heater unit), 2... Curved drive motor, 3... Deceleration mechanism, 4...
Case body, 4a... Case body bottom, 4b...
... Boss, 4c... Bent leg, 7, 8... Lever (operated member), 12... Bent elastic body, 12a...
・Boss through hole, 12c...Leg through hole, 12e
......Outer peripheral wall, 12 f...Fitting groove, 1
6...Mounting bracket, 16a...Fitting hole, 16b...Surrounding edge, M/curve/drive motor unit.

Claims (1)

[Scope of utility model registration request] A drive device in which the rotational force of a drive motor is converted into reciprocating motion via a speed reduction mechanism to operate an operated member,
A drive motor unit is constituted by a drive motor, a deceleration mechanism, and a case body housing the deceleration mechanism, and the bottom surface of the case body of the drive motor unit has at least a boss formed on the bottom surface protruding from the bottom surface. A plate-shaped elastic body has three protruding legs, a through hole in which the boss fits approximately in the center, and a through hole through which the legs pass through near the outer periphery. A boss and a leg are inserted into the hole and fitted to the bottom of the case body, and the elastic body is supported by a fixing plate fixed to the bottom of the case body and the tip of the leg, and the elastic body is attached to the outer peripheral wall of the elastic body. A shaped fitting groove is fitted into the peripheral edge of a fitting hole formed in either the base body or a mounting bracket fixed to the base body, and the fitting groove is fitted into the circumferential edge of a fitting hole formed in either one of the base body and a mounting bracket fixed to the base body, and the fitting groove is fitted into the circumferential edge of a fitting hole formed in either one of the base body and the mounting bracket fixed to the base body. The distance between the circumferential edges of the hole and the elastic body is shorter than the distance between the case body, one of the mounting brackets, and the boss to restrict lateral movement of the drive motor unit. Mount structure of the drive motor unit.