JP2001263452A - Laminated vibration-noise preventing gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated vibration-noise preventing gear manufactured by a conventional gear machining technology so as to reduce cost while reducing vibration and noise for a long period of time by using this gear in a gear train causing the problem of vibration of noise. SOLUTION: This laminated gear B is formed by laminating a plurality of thin steel plates 3 and clamp-fixing a gear part 1 with each tooth part 4 gear-cut at the outer periphery of each steel plate 3, from both sides of the gear part 1 by clamping members 2 through elastic interposed plates 13 so that each tooth part 4 of the gear part 1 is independently movable slightly in a circumferential direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated anti-vibration gear, which does not require special modification of the tooth surface during manufacture and has a damper function during use to attenuate vibration and noise. It relates to a gear characterized by the above.

[0002]

2. Description of the Related Art There are various possible causes of vibration and noise between meshing gears. One of the causes is an error in the tooth surface of the gear, which is not appropriate.
Therefore, conventionally, the tooth surface error (error formed by the tooth trace error and the tooth profile error) of at least one of the gears is corrected to the optimum tooth surface (correction by the tooth trace correction and the tooth profile correction) to thereby reduce the vibration.・ Reduction of noise is being carried out.

[0003]

However, since it is different for each case in relation to the counterpart gear to modify the tooth surface of the gear to the optimal one, it is very difficult to find the optimal modified machining value. was difficult. It has become necessary to make corrections once after the correction processing, and it has been difficult to maintain and maintain the state even after performing the optimum correction.

[0004] In addition, in order to perform the optimum correction processing on the tooth surface, higher precision is required than the conventional gear processing technology.
Since this is different for each case, there is a problem that the cost of the gear with the modified tooth surface increases.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems of the conventional anti-vibration gear by modifying the tooth surface and the method of manufacturing the same. In other words, the object of the present invention is to reduce costs and reduce costs over the long term by using this gear in a gear train where vibration and noise are a problem, while at the same time making it possible to manufacture using conventional gear processing techniques. It is an object of the present invention to provide a laminated vibration and noise prevention gear.

[0006]

The first aspect of the laminated vibration and noise reduction gear according to the present invention is that a plurality of thin steel plates 3 are laminated, and each tooth portion 4 is tooth-cut on the outer periphery of each steel plate 3. An interposed plate 1 having elasticity from both sides of the gear portion 1 so that each tooth portion 4 of the gear portion 1 can independently move slightly in the circumferential direction.
The laminated gear B is formed by being clamped and fixed by the clamping member 2 via the pinion 3.

The second type of the laminated vibration and noise prevention gear according to the present invention comprises a gear portion 1 in which a plurality of thin steel plates 3 are laminated, and holding members 2 and 2 for holding and fixing the gear portion 1 from both sides. The gear portion 1 has a toothed portion 4 on the outer periphery of each of the laminated steel plates 3, a central hole 5 for boss engagement in the center, and a plurality of small holes 7 for fastening in an annular portion 6 therebetween. Member 2
The one 2a has a cylindrical boss 8 in the center, a plurality of small holes 10 for fastening in the peripheral annular plate 9, and the other 2b has a plurality of small holes 10 in the peripheral annular plate 11. Small holes for fastening 12
From one side of the gear portion 1 to one side of the holding member 2
The cylindrical boss portion 8a is engaged with the center hole 5, the annular plate portion 11 of the clamping member 2b on the other side is engaged with the boss portion 8 from the other side, and the small holes 7, 10 and 12 are tightened. The laminated gear B is formed by passing through the tightening bolts 14 and tightening and clamping and fixing through the elastic mounting plate 13.

A third type of the laminated vibration and noise prevention gear according to the present invention comprises a gear portion 1 in which a plurality of thin steel plates 3 are laminated, and a holding member 2 for holding and fixing the thin steel plate 3 from both sides. The part 1 includes each tooth part 4 on the outer periphery of each laminated steel plate 3,
A center hole 5 for boss engagement at the center,
The one 2a has a tubular boss 8 at the center, the annular portion 15 around the periphery, the male thread 16 on the outer periphery near the side end of the boss 8, and the other 2b has An annular portion 17 is provided on the periphery, and a female screw portion 18 is provided on the inner periphery thereof. From one side of the gear portion 1, the boss 8 of the holding member 2 a on one side is engaged with the central hole 5, and the other side is engaged. From the other side of the annular portion 17 of the holding member 2b
Female screw portion 18 of the boss portion 8 is screwed into the female screw portion 18 of
It is formed into a laminated gear B by tightening, clamping and fixing via an interposed plate 13 having elasticity.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the above construction, it is desirable that the plurality of thin steel plates 3 constituting the gear portion 1 have a thickness of about 1.00 mm to 0.01 mm, but are slightly thicker or thinner. There may be. The number of the steel plates 3 to be laminated varies depending on the size, type, application, and the like of the gear, but may be any number as long as the thickness of the laminated gear is substantially equal to the thickness of a normal gear.

The gear here functions as a single gear in a state where thin steel plates 3 are stacked and subjected to gear cutting and finishing, and refers to a cylindrical gear such as a spur gear or a helical gear. .

The gear cutting and the finishing performed in addition to the gear cutting may be performed by a conventional hobbing machine which is a general gear cutting method, but it is also possible to perform the gear cutting by wire cutting. In this case, the gear cutting or the like is different from the conventional case where high precision is required to suppress vibration and noise, and the gear cutting with a normal level of accuracy is sufficient. However, needless to say, shaving may be further performed if necessary.

The holding member 2 has a cylindrical boss portion 8 in which one side 2a can be engaged with the center hole 5 of the gear portion 1 at the center.
In the second embodiment, the peripheral annular plate portion 9 is provided.
Has a plurality of small holes 10 for fastening. It is desirable that the tightening small hole 10 be a female screw hole into which the tightening bolt 14 can be screwed. However, if a nut (not shown) is used, a through hole through which the tightening bolt 14 can be inserted may be used. The third above
In this case, a male screw 16 is formed on the outer periphery of the cylindrical boss 8 near the other side.

The holding member 2b on the other side has a hole 26 which can be fitted to the cylindrical boss 8 of the holding member 2a on one side in the second embodiment, and the annular plate portion 11 on the outer periphery thereof. A plurality of fastening small holes 12 are formed in the circumferential direction. In the third embodiment, a female screw portion 18 that can be screwed to the male screw portion 16 of the cylindrical boss portion 8 is formed on the inner periphery of the peripheral annular portion 17.

The tightening small holes 7 formed in the gear portion 1 of the second type allow each steel plate 3 to slightly rotate in the circumferential direction even after being tightened by the tightening bolts 14. Are slightly larger than the outer diameter of the tightening bolt 14.

In order to clamp and fix the gear portion 1 with the clamping member 2, in the second embodiment, the cylindrical boss 8 of the clamping member 2 a on one side is inserted into the central hole 5 from one side of the gear portion 1. In the state in which the annular plate portion 11 of the holding member 2b on the other side is engaged with the boss portion 8 from the other side, the other side is interposed via the elastic interposed plate 13 such as a disc spring. A screw 14 is screwed from the small hole 12 of the clamping member 2b into the small hole 10 of the clamping member 2a on one side through the small hole 7 of the gear portion 1, and is clamped and fixed. .

In the third embodiment, the cylindrical boss portion 8 of the holding member 2a on one side is engaged with the central hole 5 from one side of the gear portion 1, and the holding member 2b on the other side is engaged from the other side. The female threaded portion 18 of the annular portion 17 is screwed into the male threaded portion 16 of the boss portion 8, and the elastic interposed plate 1 such as a corrugated washer is formed.
3 and tighten and fix.

The state of use of the laminated vibration and noise prevention gear according to the present invention is as follows.
One or more gear trains may be used in place of the gear train where noise is a problem, and may be meshed with the mating gear 19.

Thus, in the gear portion 1 of the laminated vibration and noise reduction gear, each tooth portion 4 on the outer periphery is formed by the tooth portion 20 of the mating gear 19.
And rotate to transmit power. At this time, in the gear portion 1 of the laminated vibration noise prevention gear, the tooth surface 21 of each tooth portion 4 of each steel plate 3 corresponds to the tooth surface 22 of the tooth portion 20 of the counterpart gear 19 and slightly in the circumferential direction. As a result, the toothed portion 20 of the mating gear 19 has a shape along the tooth surface 22.

That is, since the gear portion 1 of the laminated vibration noise prevention gear is slightly rotatable in the circumferential direction, the tooth surface 21 of the tooth portion 4 is shaped along the tooth surface 22 of the mating gear 19. , And moves in a direction to absorb the tooth surface error in relation to the counterpart gear 19. This allows
The gear is automatically aligned with the tooth surface 22 of the tooth portion 20 of the mating gear 19 without any special tooth surface modification, so that generation of vibration and noise between meshing gears is prevented, The generated vibration and noise are also attenuated.

Moreover, in the gear portion 1 of the laminated vibration and noise prevention gear, the laminated steel plates 3 also function as dampers. Noise is attenuated.

[0021]

1 to 7 show an embodiment of the second embodiment of the laminated vibration and noise reduction gear according to the present invention.
First, in the manufacturing method, here, a plurality of steel plates 3 having a thickness of about 0.50 mm are prepared, as shown in FIG. Each steel plate 3 has a vertical and horizontal dimension larger than the outer diameter of the gear to be manufactured, here, about 100.0 mm × about 100.0 mm.
It was cut to 0.0 mm.

As shown in FIG. 2, the plurality of steel plates 3
Here, the center hole 5 is formed at the center by press working. The hole center hole 5 is a hole through which an arbor 23 can be inserted when a hobbing machine is used at the time of gear cutting, and can be engaged with the cylindrical boss portion 8 of the holding member 2 later. Has an inner diameter of about 60.0 mm.

As shown in FIG. 3, the plurality of steel plates 3 are press-molded to have an outer diameter of about 90 mm.
An annular portion 6 having a diameter of 0 mm is formed, and a plurality of, in this case, four fastening small holes 7 are formed in the annular portion 6 at equal intervals in the circumferential direction. The tightening small holes 7 are slightly larger than the outer diameter of the tightening bolts 14 described later, and are about 1.0 m in this case.
It is formed to have a larger inside diameter by about m.

Next, as shown in FIG. 4, an annular patch plate 24 is applied from both sides of the ten steel plates 3, and a tightening bolt 25 is inserted into each of the small holes 7 for tightening. Shaped gear material A. Then, the laminated gear material A is
With the central hole 5 set in a state of being fitted to the arbor 23 of the hobbing machine, the entire outer periphery is subjected to gear cutting to form each tooth portion 4. Finishing may be performed as necessary. After that, the tightening bolt 25 and the contact plate 24
Remove.

Now, as shown in FIG.
The gear portion 1 having a central hole 5 formed in the center portion, a tooth portion 4 formed in the outer peripheral portion, and a small fastening hole 7 formed in an annular portion 6 therebetween is completed.

Next, as shown in FIG. 6, the gear portion 1 shown in FIG. 5 is clamped and fixed from both sides using the clamping member 2 and the tightening bolt 14. Here, the holding member 2 is made of carbon steel, and one side of the holding member 2a corresponds to the cylindrical boss portion 8 that can be engaged with the central hole 5 of the gear portion 1 and the side surface portion of the gear portion 1. It has an annular plate portion 9, and a small hole 10 with a female screw is formed in the annular plate portion 9 corresponding to the small hole 7 of the gear portion 1. The cylindrical boss portion 8 is formed to be slightly longer than the thickness of the gear portion 1, in other words, the tooth thickness.

As shown in FIG. 6, the other side of the holding member 2b also has an annular plate portion 1 corresponding to the side surface portion of the gear portion 1.
And a hole 26 at the center that can be fitted to the cylindrical boss 8
, And a short cylindrical portion 27 following it, and the annular plate portion 11 has a tightening small hole 12 corresponding to the tightening small hole 7 of the gear portion 1.

The connection between the gear portion 1 and the holding member 2 is as follows.
As shown in FIGS. 6 and 7, from one side of the gear portion 1,
The cylindrical boss 8 of the one holding member 2 a is engaged with the central hole 5 of the gear 1, and the annular plate 9 is applied to the side surface of the gear 1. Further, the holding member 2b on the other side is engaged with the side end of the cylindrical boss portion 8 protruding through the central hole 5 of the gear portion 1 through the hole portion 26 from the other side, and the annular plate portion 11 is formed. To the side surface of the gear unit 1.

In the above case, a disc spring washer is interposed here as an elastic interposed plate 13 between each side surface of the gear portion 1 and the annular plate portions 9 and 11 of the holding plate portions 2a and 2b. In advance, the fastening bolt 14 is inserted through the small hole 12 of the clamping member 2b on the other side into the small hole 7 of the gear portion 1 and the male screw portion 28 at the other end is clamped on one side. It is screwed into the female screw part of the small hole 10 for tightening 2a, and tightened and fixed. Thus, the laminated gear B is completed.

Next, FIG. 8 shows an embodiment of the third embodiment of the laminated vibration and noise prevention gear according to the present invention, and the gear portion 1 is almost as thin as the second embodiment. What is necessary is just to form by gear cutting in the state which laminated | stacked the steel plate 3. Each of the laminated steel plates 3 has a tooth portion 4 on the outer periphery and a central hole 5 in a central portion, and an annular portion 6 is provided therebetween. In this case, a small hole for fastening is formed in the annular portion 6. Not.

The holding member 2 is composed of two members in the same manner as described above. Here, one of the holding members 2a has an annular portion 15 corresponding to the side surface of the gear portion 1 and a central portion of the gear portion 1. It has a cylindrical boss 8 that can be engaged with the hole 5, and a male screw 16 is formed on the outer periphery of the cylindrical boss 8 near the other side.

The holding member 2b on the other side has an annular portion 17 corresponding to the side surface portion of the gear portion 1, and a female screw portion 18 which can be screwed to the male screw portion 16 of the boss portion 8 on the inner periphery thereof. Is formed.

The coupling between the gear portion 1 and the holding member 2 is performed by engaging the cylindrical boss 8 of the holding member 2a with the center hole 5 from one side of the gear portion 1 from one side. The female screw portion 18 of the annular portion 17 of the holding member 2b on the other side is screwed from the other side to the male screw portion 16 of the boss portion 8 protruding to the other side portion, and tightened and fixed.

In the above case, an elastic interposition plate 13 is provided between both sides of the gear portion 1 and the two holding members 2a and 2b.
An annular washer is interposed in the waveform. In the figure,
Reference numeral 29 denotes a snap ring engaged with the outer periphery of each of the holding members 2a and 2b, and reference numeral 30 denotes a locking screw between the male screw portion 16 and the female screw portion 18.

In each of the above embodiments, the tooth portions 4 of the laminated steel plates 4 are initially arranged in a laminated state as shown in FIG. When a force is applied, as shown in FIG. 10, each tooth portion 4 is independently and slightly rotatable in the circumferential direction.

Therefore, when the laminated gear B is engaged with the mating gear 19 and rotated, as shown in FIG. 10, the laminated steel plates 3 of the gear portion 1 are independently rotated in the circumferential direction. 11 and 12, each tooth surface 21 automatically moves between the tooth surface 22 and the tooth surface 22 of the mating gear 19 in a direction to absorb the tooth surface error. .

As a result, the laminated vibration and noise reduction gear according to the present invention, as shown in FIG. 12, has a tooth surface 21 without any special tooth surface modification between the gear and the mating gear. A state follows the tooth surface 22 of the gear 19. Moreover, since the laminated steel plates 3 are not fixed but fixed and fixed.
It plays the role of a damper against vibration and impact. Therefore, the generation of vibration and noise due to meshing with the mating gear 19 is prevented, and the generated vibration and noise is reduced.

In the illustrated example, a cylindrical gear and a spur gear have been described. However, it is needless to say that the present invention can be applied to a conical gear and a helical gear.

[0039]

As is apparent from the above, the laminated vibration and noise prevention gear according to the present invention can be manufactured by the conventional gear processing technology, which can reduce the cost and the gear train in which vibration and noise are problematic. By using this gear inside, vibration and noise can be reduced in a long term.

That is, 1) The laminated vibration and noise reduction gear according to the present invention can be formed by a conventional hobbing machine, which is a conventional gear processing method, in a state where thin steel plates are laminated. There is no need to make special tooth surface modifications in relation to Therefore, it can be manufactured by gear cutting or the like with a normal level of accuracy, and the manufacturing cost can be reduced.

2) In the laminated vibration and noise reduction gear according to the present invention, the gear portion formed by laminating thin steel plates is sandwiched and fixed from both sides by clamping members. It is clamped and fixed via an elastic interposed plate between the two.

Thus, in the laminated vibration noise reduction gear, the tooth surface of each tooth portion of each steel plate of the gear portion is slightly movable in the circumferential direction, so that when the gear is rotated by meshing with the mating gear. In addition, the tooth surface of each tooth portion of each steel plate moves slightly in the circumferential direction corresponding to the tooth surface of the tooth portion of the counterpart gear, and takes a shape along the tooth surface of the counterpart gear.

That is, since the gear portion of the laminated vibration and noise prevention gear moves in a direction to absorb the tooth surface error between the gear and the mating gear, the mating portion is automatically made without any special tooth surface modification. It is in the state of being along the tooth surface of the shaped gear, and it is possible to prevent the generation of vibration and noise between the two meshing gears, and to attenuate the generated vibration and noise.

Further, in the gear portion of the laminated vibration and noise prevention gear, the laminated steel plates also function as a damper, so that vibration and noise are generated from this surface, and the generated vibration and Noise can be attenuated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a laminated steel sheet used for manufacturing a laminated vibration noise reduction gear according to the present invention.

FIG. 2 is a perspective view showing a state in which a central hole is formed in the laminated steel plates shown in FIG.

FIG. 3 is a perspective view of a state in which the outer periphery of the laminated steel plate shown in FIG. 2 is formed in a circular shape and small holes for fastening are formed to form a laminated gear material.

FIG. 4 is a perspective view showing a state in which the laminated gear material shown in FIG. 3 is being tooth-cut.

FIG. 5 is a perspective view showing a gear portion formed by cutting the laminated gear material shown in FIG. 4;

FIG. 6 is an exploded perspective view of a holding member used in the embodiment of the second laminated vibration noise reduction gear according to the present invention.

FIG. 7 is a longitudinal sectional side view of the second laminated vibration noise reduction gear according to the present invention.

FIG. 8 is a vertical sectional side view of the third laminated vibration noise reduction gear according to the present invention.

FIG. 9 is a partially enlarged perspective view of a tooth portion of the embodiment of the laminated vibration noise reduction gear according to the present invention.

FIG. 10 is a perspective view showing a state in which each tooth portion of the embodiment shown in FIG. 9 is slightly rotated in the circumferential direction.

FIG. 11 is a partially enlarged front view showing a meshing state between the laminated vibration noise reduction gear according to the present invention and a mating gear.

FIG. 12 is an enlarged sectional view taken along line II in FIG. 11;

[Explanation of symbols]

 A-Laminated gear material B-Laminated gear 1-Gear part 2-Clamping member 2a-Clamping member 2b-Clamping member 3-Steel plate 4-Tooth portion 5-Center hole 6-Ring portion 7-Small for tightening Hole 8-Cylindrical boss 9-Annular plate 10-Tightening hole 11-Annular plate 12-Tightening hole 13-Interposition plate 14-Tightening bolt 15-Annular portion 16-Male thread 17-Annular Part 18-female screw part 19-counterpart gear 20-tooth part 21-tooth surface 22-tooth surface 23-arbor 24-backing plate 25-tightening bolt 26-hole 27-short cylindrical part 28-male screw part 29- Snap ring 30-Loosening screw

Claims (3)

[Claims] 1. A gear 1 having a plurality of thin steel plates 3 laminated on each other and a toothed portion 4 formed on the outer periphery of each steel plate 3, and each toothed portion 4 of the gear portion 1 is independently circulated. A laminated vibration noise reduction gear formed in the laminated gear B by being fixed to the holding member 2 via elastic interposition plates 13 from both sides of the gear portion 1 so as to be able to slightly move in the direction. . 2. A gear unit 1 in which a plurality of thin steel plates 3 are stacked.
And a pair of clamping members 2 and 2 for clamping and fixing the same from both sides.
And a central hole 5 for boss engagement at the center, and an annular portion 6 therebetween.
The holding member 2 has a cylindrical boss 8 at the center and a plurality of fastening small holes 10 in a peripheral annular plate 9. The other side 2b has a plurality of small holes 12 for fastening in the peripheral annular plate portion 11, and from one side of the gear portion 1, the cylindrical boss 8 of the one-side holding member 2a is And the annular plate portion 11 of the holding member 2b on the other side is engaged with the boss portion 8 from the other side, and the tightening bolts 14 are passed through the small holes 7, 10, and 12 for elasticity. A laminated vibration and noise prevention gear formed on the laminated gear B by being clamped and fixed through the plate 13. 3. A gear unit 1 in which a plurality of thin steel plates 3 are stacked.
And a pinching member 2 for pinching and fixing it from both sides.
A center hole 5 for boss engagement in the center, and the holding member 2 has a tubular boss portion 8 in one side 2a, an annular portion 15 in the periphery, and a boss portion 8a. Has an external thread portion 16 on the outer periphery near the side end, the other side 2b has an annular portion 17 on the periphery, and has an internal thread portion 18 on the inner periphery thereof. The boss 8 of the holding member 2a is engaged with the center hole 5, and the female thread 18 of the annular portion 17 of the other holding member 2b is screwed into the male thread 16 of the boss 8 from the other side. A laminated vibration noise prevention gear formed on the laminated gear B by tightening, clamping and fixing via an elastic interposed plate 13.