JPH07322561A - Washer and fixing method of washer to shaft - Google Patents

Abstract

PURPOSE:To perform a work for bearing a shaft, provided with a large diameter flange part, easily and positively at a supporting part while interposing a washer between the supporting part and the flange part. CONSTITUTION:The washer 9 is bent to exhibit spring characteristics. The through hole of the washer 9 passing a third shaft 7 has diameter M larger than the outer diameter N of the third shaft 7 under planar state before bending. Under naturally bent state, the through hole has diameter (m) smaller than M and N. The washer 9 is temporarily held by the third shaft 7 such that it is not removed and then it is set in a frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer for attaching a support shaft such as a gear shaft provided to an actuator of a sunroof to a support portion such as a motor frame, and a method for attaching the washer to the support shaft. is there.

[0002]

BACKGROUND OF THE INVENTION Generally,
In this kind of actuator, a support shaft integrally formed with a large-diameter flange-shaped wheel gear for decelerating and outputting the driving force from the electric motor is provided with the large-diameter wheel with respect to the motor frame of the electric motor. In some cases, the gear and the inner surface of the motor frame are rotatably supported so as to face each other. In such a case, as shown in FIG. 8, between the large-diameter wheel gear 7a and the inner surface of the frame 4, A washer 10 for absorbing backlash in the thrust direction may be interposed. Then, as an assembly procedure in such a case, the support shaft 7 is passed through the through hole 4a with the washer 10 set at the position of the through hole 4a through which the support shaft 7 of the frame 4 passes, or the washer 10 is loosely fitted. There is a method of penetrating the support shaft 7 in the state of being penetrated into the through hole 4a. However, in the former case, when the support shaft 7 is passed through the through hole 4a, the large-diameter wheel 7a is present, so that the set washer 10 is set.
It is difficult to penetrate the through hole 4a without shifting the shaft, and there is a possibility that the support shaft 7 may be attached through while the washer 10 is displaced. On the other hand, in the latter case, the washer 10 penetrating loosely must be pushed through the through hole 4a while holding the washer 10 so as not to fall off from the spindle 7, but the large diameter wheel gear 7a And the large diameter wheel gear 7a interferes and the washer 10 is properly assembled between the large diameter wheel gear 7a and the frame 4 in any case. There is a problem that it is difficult to visually confirm whether or not the product is not reliable, and the reliability of the product is poor.

[0003]

SUMMARY OF THE INVENTION The present invention was devised with the object of providing a washer and a method of assembling a washer to a support shaft that can eliminate these drawbacks in view of the above circumstances. In addition, a through hole having a diameter larger than the outer diameter of the support shaft is formed in a flat plate state between the support portion supporting the support shaft and the large-diameter flange-shaped portion integrally provided on the support shaft. When inserting a washer in the form of a ring plate, the washer has a plate surface that curves in a natural state and elastically deforms into a flat plate by applying a load, and the washer has a hole diameter of a through hole in a natural state. It is characterized in that a part thereof is curved so as to have a diameter smaller than the outer diameter of the support shaft. Further, according to the present invention, the support shaft integrally provided with the large-diameter collar-shaped portion penetrates the support shaft through a ring-plate-shaped washer having a through hole having a diameter larger than the support shaft outer diameter in a flat plate state. When assembling the bearing to the support in the pressed state, the washer shall have the plate diameter curved so that part of the diameter of the through hole is smaller than the outer diameter of the support shaft in the natural state. After one of the facing parts is set in an inclined shape that passes over the support shaft edge, the other side part is pressed while supporting the one side part to widen the space between the facing parts of small diameter. The washer is temporarily held by the support shaft by sandwiching the support shaft by the opposing portion having a small diameter by penetrating the shaft and elastically returning to the natural state side after passing through the support shaft. It is characterized in that it is configured so as to be bearing-assembled to the support portion.

According to the present invention, the washer can easily and surely be interposed between the large-diameter wheel gear and the supporting surface.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 is an actuator for a sunroof provided on a ceiling portion of a vehicle, and the actuator 1 is composed of a motor unit 2 and a deceleration output unit 3 for decelerating and outputting a driving force of the motor unit 2. Has been done.
The deceleration output unit 3 is composed of first, second, and third support shafts 5, 6, and 7 that are supported by the frame 4 of the actuator 1, and a drive control unit 8 that controls motor drive.
The second large-diameter gear 6a of the second support shaft 6 meshes with the first small-diameter gear 5b of the first support shaft 5 integrally formed with the worm wheel 5a that meshes with the worm gear 2a projecting from the motor unit 2. The second small diameter gear 6b of the second support shaft 6 meshes with the third large diameter gear 7a of the third support shaft 7, and the third small diameter gear 7b of the third support shaft 7 meshes with the drive control unit 8. In this way, the driving force from the motor unit 2 is decelerated via the first support shaft 5 and the drive control unit 8 via the third support shaft 7.
Is output from the second support shaft 6 in a drive-controlled state from which the roof is opened and closed.

The third support shaft 7 is rotatably supported by the frame 4 with the third large-diameter gear 7a closely facing the frame 4, and the third large-diameter gear 7a and the frame are supported. A washer 9 embodying the present invention is interposed between the washer 9 and 4. That is, this washer 9 has an arc surface shape (R surface shape) so that one surface side of the plate surface projects and the other surface side immerses in the natural state.
However, in the present embodiment, the washer 9 is curved so as to form an arc surface with an axis X orthogonal to one lateral position on the axis L of the washer 9 as an axis. It is formed so as to elastically deform into a flat plate by applying a load in the direction of the core wire, and a flat plate-shaped steel material is punched into a predetermined shape and formed into a curved shape. It is formed by imparting characteristics, but in this case, in the punched state, a perfect circular through hole 9 having a diameter M is formed in the center thereof.
Although a is formed, the diameter M is larger than the diameter N of the third support shaft 7 penetrating the through hole 9a (M>
N). Then, although the through hole 9a having the diameter M is curved, the through hole 9a is deformed into an elliptical shape in a plan view, that is, the through hole 9a has the diameter M. The diameter m of the small diameter portion 9c is set to be smaller than the diameter N of the third support shaft 7 (N> m). The heat treatment is performed so as to have the above-mentioned spring characteristic so as to maintain this dimensional state (that is, M>N> m).

Next, the procedure for attaching the third support shaft 7 to the frame 4 with the washer 9 formed as described above interposed will be described. To do so, first, the washer 9 is to be held through the third support shaft 7 in a temporary holding state. In that case, the washer 9 must be attached to the third support shaft 7 from the protruding surface side thereof. become. That is, as shown in FIG. 4 (A), after the washer 9 is set in such a manner that one side of the small-diameter portion 9c of the through hole 9a passes the one end edge portion of the third support shaft 7 in an inclined shape, the one side While supporting the part (for example, supporting it by holding it in a retaining shape with the operator's finger or an appropriate tool or jig), press the other part (use the operator's finger or the appropriate tool or jig. When the washer 9 is elastically deformed into a flat plate shape (deformed in a direction in which the curved shape is flattened), the small diameter portion 9c of the through hole 9a is widened and its diameter is the diameter N of the third support shaft 7. As a result, the washer 9 is assembled in a state of penetrating the third support shaft 7, and the pressure of the washer 9 is released to elastically return the washer 9 as shown in FIG. 4 (B). As described above, the facing portion of the through-hole small-diameter portion 9c is in a small-diameter state in which the third spindle 7 is sandwiched, 3
Is temporarily held by the support shaft 2 in a retaining shape. In this temporary holding state, the tip end of the third support shaft 7 is passed through the frame through hole 4a, and the other end of the third support shaft 7 is supported by the cover body 4b that covers the open end of the frame 4. The third support shaft 7 is configured to be bearing-assembled to the frame 4 with the washer 9 interposed.

In the embodiment of the present invention configured as described above, the third support shaft 7 integrally provided with the large diameter wheel gear 7a, which is the third large diameter gear, is provided with the large diameter wheel gear 7a and the frame 4. When the washer 9 is supported by the frame 4 with the washer 9 interposed therebetween, the washer 9 temporarily held in advance by the third support shaft 7 in a retaining shape is inserted into the frame through hole 4a. As in the conventional case, the washer is placed in the frame through hole 4a with the washer through hole 9a aligned in advance, and the third support shaft 7 is inserted while paying close attention so that this state is not displaced. It is not necessary to do so, and the assembling work with the washer 9 of the third support shaft 7 penetrating is reliable, and the assembling work becomes easy, and the workability is greatly improved and the product reliability is also improved. To do.

Incidentally, the washer of the present invention is not limited to the above-mentioned embodiment, and the curved shape is such that, when the washer is curved in an arc shape, the axis orthogonal to the reference washer axis is one side. However, it is also possible that the washer is elastic when it is bent. In the natural state, there is a part with a larger diameter and a part with a smaller diameter than the penetrating spindle, and when the curved shape is elastically deformed to the flat plate side, the small diameter part becomes larger than the spindle. What is necessary is that the washer penetrates the support shaft.

[0010]

In summary, since the present invention is constructed as described above, a support shaft integrally formed with a large-diameter collar-shaped portion has a washer interposed between the collar-shaped portion and the support portion. While the washer is supported in the supported state, the plate surface of the washer is curved in the natural state, and the hole diameter of the through hole through which the spindle passes is such that in the natural state, part of the hole diameter is outside the spindle. Although the diameter is smaller than the diameter, it becomes larger than the outer diameter of the support shaft when it is elastically deformed into a flat plate shape by applying a load.Therefore, insert the washer into the support part while temporarily holding it in a retaining shape on the support shaft. Can be supported by
It is no longer necessary to insert and assemble the support shaft in a state where the washer is placed on the support portion in advance and easily shifts, unlike the conventional case
Assembling the washer to the support part with the washer penetratingly assembled to the support shaft is simple and reliable, and the penetrating and assembling work of this washer is easy and the workability is greatly improved. Reliability is also improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view of a sunroof 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.

FIG. 4 (A) is a side view showing a state in which a washer is set to be incorporated into a support shaft, and FIG. 4 (B) is a side view showing a state in which the washer is incorporated into the support shaft.

FIG. 5 (A) is a plan view of a washer in a natural state,
FIG. 5B is a side view of the washer in the natural state.

FIG. 6 (A) is a plan view of a washer at a pre-stage of curve forming, and FIG. 5 (B) is a side view of a washer at a pre-stage of curve forming.

FIG. 7 is a side view of a washer of the second embodiment.

FIG. 8 is an assembly explanatory diagram of a conventional example.

[Explanation of symbols]

 1 Actuator 2 Motor part 2a Worm gear 3 Deceleration output part 4 Frame 5 First support shaft 7 Third support shaft 7a Third large diameter gear (large diameter wheel gear) 8 Drive control part 9 Washer 9a Through hole 9b Large diameter part 9c Small diameter Part

Claims (4)

[Claims] 1. A through hole having a larger diameter than the outer diameter of the support shaft is formed in a flat plate state between a support portion supporting the support shaft and a large-diameter collar-shaped portion integrally provided on the support shaft. When a washer in the form of a ring plate is interposed, the washer has a plate surface that bends in a natural state and elastically deforms into a flat plate when a load is applied. A washer characterized in that a part of is curved so as to have a diameter smaller than the outer diameter of the support shaft. 2. A ring plate-shaped washer having a through hole having a diameter larger than the outer diameter of the support shaft in a flat plate state is passed through the support shaft integrally provided with a large-diameter collar-shaped portion. When assembling the bearing to the support in the pressed state, the washer shall have the plate diameter curved so that part of the diameter of the through hole is smaller than the outer diameter of the support shaft in the natural state, and the washer has the aforementioned small diameter. After one of the facing parts is set in an inclined shape that passes over the spindle edge, the other side part is pressed while supporting the one side part to widen the space between the facing parts of small diameter. The washer is temporarily held by the support shaft by sandwiching the support shaft by the opposing portion having a small diameter by penetrating the shaft and elastically returning to the natural state side after passing through the support shaft. Assembling a washer to a support shaft, characterized by being configured to be bearing-mounted on a support portion Method. 3. The washer according to claim 1 or 2, wherein the washer is curved in an arc surface with an axis orthogonal to the washer axis direction as a reference, and the washer and the washer are attached to a support shaft. Method. 4. A washer and a washer according to claim 1, wherein an axis of the washer which is curved in an arcuate surface and which is orthogonal to a direction of the washer axis is at either position on the washer axis. How to attach to the spindle.