JPS6219083Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the mounting structure of a motor. For example, the distance between the shaft centers of a gear fixed to the motor shaft and a driven gear that meshes with the gear is adjusted to facilitate proper meshing of both gears. The present invention relates to a motor mounting structure that can be obtained.

Structures that transmit the rotational driving force of a motor through gears to obtain a predetermined operation are widely used in various fields, and conventional examples of such structures are shown in FIGS. 1 and 2.

What is shown in this figure is related to a structure that operates a wiper blade to remove mud, dust, and other dirt attached to the headlight of a car, and the reference numeral 1 in the figure is a box-shaped case; Code 2 is the case 1 mentioned above.
It is a lid-like cover that covers the opening surface of the A wiper motor 3 is fixed to the inside of the case 1 with screws via a mounting bracket, and the wiper motor 3 is
Gears 4, 5, and 6 are provided for transmitting rotational driving force, and a crankshaft 7 protruding toward the cover 2 is fixed to the gear 6.

A pivot shaft 8 is attached to the cover 2 so as to freely rotate while protruding from the cover 2, a wiper blade 9 is fixed to one end of the pivot shaft 8, and one end of a pivot arm 10 is fixed to the other end. ing. One end of a connecting rod 11 is connected to the other end of the pivot arm 10 by a pin 12, and the crankshaft 7 is inserted into a connecting hole 11a formed at the other end of the connecting rod 11.

That is, the wiper motor 3 is rotationally driven to rotate a gear (in this case, a worm) 4 fitted and fixed on its drive shaft, and the rotational force is applied to a gear (in this case, a worm wheel) 5 that meshes with the gear 4.
Transmits deceleration to. Next, the rotational force of the gear 5 causes the gear 6 and the crankshaft 7 to rotate, and at the same time, one end side of the connecting rod 11 is rotated. Then, the pivot arm 10 connected to the other end of the condensing rod 11 is reciprocated about the pivot shaft 8, thereby reciprocating the pivot shaft 8 and causing the wiper blade 9 to perform a predetermined wiping operation. ing. In addition, a continuous thin endless protrusion 1a is formed on the contact surface of the case 1 with the cover 2,
With the cover 2 attached, the thin protrusion 1a
is embedded in the elastic sealing material 13 so that watertightness can be improved at any time.

However, in such a conventional motor mounting structure, it is difficult to easily adjust the position of the motor 3. Therefore, in order to make the distance between the shaft centers of gear 4 (driving gear) and gear 5 (driven gear) appropriate and to improve the meshing of both gears 4 and 5, it is necessary to improve the machining accuracy and assembly of each component. To improve accuracy or use a separate bracket, motor 3
I had to adjust the fixing position of the. Therefore, the production cost is high in terms of precision or the number of parts, the handling of the parts is troublesome, and the structure is large, making it difficult to arrange the motor 3.

Therefore, the object of this invention is to provide a motor mounting structure that allows the center position of the motor shaft to be adjusted extremely easily.

This invention is a motor mounting structure in which a motor fixing part provided on an end cover of the motor is fitted into a motor insertion hole provided in a mounting bracket to fix the motor, and the motor fixing part provided on the end cover of the motor is fitted into a motor fitting hole provided in a mounting bracket. The part is provided with a protrusion that partially protrudes outside the outer peripheral part of the motor fixing part, and the motor fitting hole and the motor fitting hole, which is larger than the outer diameter of the motor fixing part provided in the mounting bracket, are provided. forming a protrusion-fitting receptacle that abuts a protrusion provided on the motor fixing part in a loosely fitted state with the motor fixing part to serve as a rotation fulcrum in the motor insertion hole of the motor fixing part; The motor is characterized in that the axial center of the motor is finely adjusted and fixed within the range of play between the motor fixing part and the motor insertion hole.

Next, an embodiment of this invention will be described in detail based on the drawings.

3 to 8 show an embodiment of this invention. As shown in the figures, the motor housing 32 of the motor 23 has a generally cylindrical shape with an opening at one end, and an end cover 34 is provided at the opening. A plurality of claws 3 formed on the motor housing 32 by inserting the
5 is bent to fix the end cover 34 to the motor housing 32. A motor shaft 33 protrudes from this end cover 34.
A drive gear (worm) 24 is fixed to the drive gear 24, and a driven gear (worm wheel) 25 that rotates around a rotation support shaft 25a fixed to a mounting bracket 30 is meshed with the drive gear 24. As shown in the figure, the structure is such that the wiper blade 9 can be operated.

A generally circular motor fixing portion 34a that protrudes toward the drive gear 24 is formed in the center of the end cover 34.
A bearing metal 36 that supports the motor shaft 33 is disposed at the center of a (see FIG. 6). Furthermore, a protrusion 34b is provided at the lower end of the motor fixing part 34a in FIG. The thickness h (see FIG. 4) is the same as or slightly larger than the thickness t of the mounting bracket 30.

Furthermore, in the end cover 34 in this embodiment, a semicircular flange 34c is formed to cover the protrusion 34b from the drive gear 24 side,
The radius of the semicircle is made the same as the outer circumferential radius of the motor fixing portion 34a. In this way, when the end cover 34 is inserted into the mounting bracket 30 and the motor 23 is fixed, the position of the motor 23 can be stabilized, so that the fixation can be performed reliably and easily.

As shown in FIG. 7, the mounting bracket 30
An elongated motor fitting hole 30a, which is larger than the outer diameter of the motor fixing part 34a, is formed in the end cover 34 of the motor 23 so that the motor fixing part 34a formed on the end cover 34 of the motor 23 can be loosely fitted therein. The radius of the semicircular shape formed in the upper and lower parts of the motor fitting hole 30a in FIG. 7 is slightly larger than the radius of the motor fixing part 34a of the motor 23, and 34c can be inserted and inserted at the same time.

Furthermore, a protrusion fitting receiving part 30b having a shape slightly larger than the protrusion 34b of the motor 23 is formed at the lower end of the motor fitting hole 30a in FIG. 7, and when inserted in the state shown in FIG. When the motor 23 is inserted downward to the state shown in Fig. 8, the motor 23
The protrusion 34b fits into the protrusion fitting receiving part 30b, and the tip (lower end) of the protrusion 34b and the bottom part of the protrusion fitting receiving part 30b are in line contact along the longitudinal direction of the motor shaft 33. do. At this time, the internal threaded portion 34d provided on the end cover 34 of the motor 32
The formation position of the elongated hole 30c formed in the mounting bracket 30 is made to coincide with the formation position of the long hole 30c formed in the mounting bracket 30,
As shown in FIG. 4, the male screw 31 passes through the elongated hole 30c and can be screwed into the female threaded portion 34d, so that the mounting bracket 30 and the end cover 34, that is, the motor 23 can be fixed.

In the motor mounting structure configured as described above, when the motor fixing part 34a of the motor 23 is inserted into the motor insertion hole 30a of the mounting bracket 30 and pushed downward, the protrusion 34b formed on the end cover 34 The tip of the motor shaft 33 and the protrusion fitting receiving portion 30b formed in the motor fitting hole 30a are connected to the motor shaft 33.
Since the motor fitting hole 30a has a shape slightly larger than the motor fixing part 34a and is in a loosely fitted state, the motor can be moved with the contact point as a fulcrum. 2
3 can be rotated as appropriate within the range of play between the motor fixing portion 34a and the motor insertion hole 30a. Since the female threaded portion 34d provided on the end cover 34 and the elongated hole 30c provided on the mounting bracket 30 are formed in the same position, the motor 23 can be moved in the direction orthogonal to the longitudinal direction of the motor shaft 33 as described above. After finely adjusting the position of the motor shaft 33 by rotating it as appropriate, it can be fixed with the male screw 31. This situation is shown in Figures 9 to 1.
Fig. 1 shows the lines A-A in Fig. 4 when the motor 23 is installed in the neutral position, and Figs. 10 and 11 show the cases when the motor 23 is installed shifted to the left or right. A cross section corresponding to the cross section is shown.

In this way, if the mounting position of the motor 23 is adjustable, the dimension D in FIG. Fine adjustment can be easily made by changing the center-to-center distance with 25. In this case, it goes without saying that the driving gear 24 and the driven gear 25 are not limited to a worm or a worm wheel as in this embodiment.

As described above, according to this invention, there is provided a motor mounting structure in which a motor fixing part provided on an end cover of the motor is fitted into a motor insertion hole provided in a mounting bracket to fix the motor. The motor fixing part provided on the end cover of the motor fixing part is provided with a protrusion that partially protrudes outside the outer periphery of the motor fixing part, and the motor fitting hole provided in the mounting bracket is larger than the outer diameter of the motor fixing part. , a protrusion fitting that comes into contact with a protrusion provided on the motor fixing part and serves as a pivot point for rotation of the motor fixing part in the motor fixing hole in a state where the motor fixing part and the motor fixing part are loosely fitted; A matching receiving part is formed, and the shaft center of the motor is finely adjusted and fixed within the range of play between the motor fixing part and the motor insertion hole. It is possible to easily and reliably adjust the distance between the shafts of the driven gear that meshes with the driven gear to improve the meshing of both gears, and there is no need to extremely increase the precision of parts or increase the number of parts as in the past. An extremely large practical effect can be obtained in that the production cost for mounting the motor can be significantly reduced, and the design requirement of fitting the mounting structure into a small space can also be satisfied.

[Brief explanation of the drawing]

Fig. 1 is an explanatory view of the external appearance of a wiper for automobile headlights, Fig. 2 is an exploded explanatory view showing a conventional example of the motor mounting state, and Fig. 3 is a plan view showing the motor mounting structure in one embodiment of this invention. 4 is an exploded side view of the motor and mounting bracket in FIG. 3, FIG. 5 is a front view of the motor in FIG. 3,
FIG. 6 is a sectional view taken along the line A-A in FIG. 4, FIGS. 7 and 8 are front explanatory views of the mounting bracket showing the positional relationship between the mounting bracket and the motor fixing part, and FIGS. 9 to 11 respectively. The figures are respectively a cross-sectional explanatory view when the motor is fixed at a neutral position, a cross-sectional explanatory view when the motor is shifted to the right and fixed, and a cross-sectional explanatory view when the motor is shifted and fixed to the left. 23...Motor, 30...Mounting bracket, 3
0a...Motor fitting hole, 30b...Protrusion fitting receiving part, 30c...Long hole, 31...Male thread, 33...
Motor shaft, 34...End cover, 34a...Motor fixing part, 34b...Protrusion, 34c...Flange, 34d...Female thread.

Claims (1)

[Scope of utility model registration request] A motor mounting structure in which a motor fixing part provided on an end cover of the motor is fixed by fitting into a motor insertion hole provided in a mounting bracket, the motor fixing part provided on the end cover of the motor having:
A protrusion that partially protrudes outside the outer periphery of the motor fixing part is provided, and a motor fitting hole larger than the outer diameter of the motor fixing part provided in the mounting bracket is connected to the motor fitting hole and the motor fixing part. A protrusion fitting receptacle is formed which comes into contact with a protrusion provided on the motor fixing part in a loosely fitted state and serves as a rotation fulcrum in the motor insertion hole of the motor fixing part, and the shaft of the motor A motor mounting structure characterized in that the motor is fixed by finely adjusting the center within the range of play between the motor fixing part and the motor insertion hole.