JPH07224850A - Spring type resilient shaft coupling - Google Patents

Abstract

PURPOSE:To suppress or prevent the generation of noise during operation by a method wherein a buffering mechanism is juxtaposed with a coil spring between a spring support on the drive side and a spring support on the driven side. CONSTITUTION:When a disc 13 on the drive side is suddenly displaced through twist vibration of an engine and an impact load F is exerted on a spring support 32 on the drive side, the spring support 32 on the side is pushed forward against a support surface 51 and makes access to a spring support 33 on the driven side. Coil springs 31a and 31b are compressed therealong and absorb impulsive displacement and transmission to the disc 21 on the driven side is suppressed. When a compression amount of the coil springs 31a and 31b attains 70% of a free length, i.e., a given value, a gap S between a buffering material 41 at the tip of a stopper part 32a and a buffering material 42 at the tip of a stopper part 33a is reduced to zero and the buffering materials 41 and 42 are brought into contact with each other. This constitution blocks further compression of the coil springs 31a and 31b and prevents the occurrence of damage. Further, through resilient deformation of the buffering materials 41 and 42, an impact load is relaxed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring type elastic shaft coupling suitable for being provided at a connecting portion between a crankshaft of an engine and a rotary shaft of a generator.

[0002]

2. Description of the Related Art When a generator is driven by an engine,
In order to prevent the torsional vibration of the engine from being transmitted to the generator, a rubber element type elastic shaft coupling, a spring type elastic shaft coupling, etc. are provided.

FIG. 6 shows an example of a conventional spring type elastic shaft coupling disclosed in Japanese Patent Publication No. 59-43647. In FIG. 6A, 010 is an output shaft such as an engine crankshaft, 011 is a drive side disk wedged to the output shaft 010 via a key 012, 020 is an input shaft such as a rotating shaft of a generator, and 021. Is the driven side disk wedged to the input shaft 020 via the key 038, and 014 is the bolt on the drive side disk 011.
It is an auxiliary disc fixed at 015.

Reference numeral 031 is a coil spring, one end of which is supported by a drive side spring bearing 032 and the other end of which is supported by a driven side spring bearing 033, as shown in FIG. 6 (B). The back surface of the driving side spring bearing 032 abuts on the supporting surface 041 formed on the driving side disk 011 and the auxiliary disc 014, and the back surface of the driven side spring bearing 033 abuts on the supporting surface 042 formed on the driven side disk 021. There is.

The spring mechanism composed of the coil spring 031, the driving side spring bearing 032, and the driven side spring bearing 033 is arranged at equal intervals along the outer periphery of the driving side disc 011, the driven side disc 021 and the auxiliary disc 014. It is housed in a number of compartments 040.

Drive side disk due to torsional vibration of the engine
When 011 is abruptly displaced in the Z direction of FIG. 6 (B), the coil spring 031 is compressed and absorbs this shock displacement, and the shock displacement is transmitted to the driven disk 021. Suppress.

[0007]

In the above-mentioned conventional spring type elastic shaft joint, in order to protect the coil spring 031 of the spring mechanism, when the amount of deflection thereof reaches a predetermined value, the drive side spring receiver 032 and the driven side are supported. The tip surfaces of the spring bearing 033 are in contact with each other to function as a stopper.However, when an impact load is applied to the coil spring 031, the tip surface of the drive side spring bearing 032 and the tip surface of the driven side spring bearing 033 will not contact each other. May collide with each other to generate noise, or the tip surfaces may be worn or damaged.

Further, the back surface of the driving side spring bearing 032 and the supporting surface 041 abutting on the back surface and the back surface of the driven side spring bearing 033 and the supporting surface 042 abutting on the back surface are repeatedly worn by an impact load to be worn or damaged. There was a fear.

The present invention has been invented in order to solve the above problems, and an object thereof is to provide a spring type elastic shaft coupling which can suppress or prevent noise during operation. Another object of the present invention is to provide a spring type elastic shaft coupling which has low maintenance and repair costs and a long service life. Another object of the present invention is to provide a spring type elastic shaft coupling whose elastic characteristics can be easily changed.

[0010]

SUMMARY OF THE INVENTION The gist of the first invention is to connect a drive side disk connected to an output shaft of a drive machine such as an engine and an input shaft of a driven machine such as a generator. A spring type elasticity that accommodates a coil spring and a spring mechanism composed of a drive side spring receiver supporting both ends of the coil spring and a driven side spring receiver in a plurality of cavities formed at intervals along the outer periphery of the driven side disk. In the shaft joint, a spring type elastic shaft joint is characterized in that a buffer mechanism is provided along with the coil spring between the drive-side spring receiver and the driven-side spring receiver.

The buffer mechanism may be composed of a buffer material such as rubber or rubber fixed to the opposite end surfaces of the drive-side spring receiver and the driven-side spring receiver.

The buffer mechanism may be constructed by a dashpot mechanism in which a viscous fluid such as silicon oil is enclosed in the fluid chamber.

The gist of the second invention is that the outer circumference of a drive side disk connected to an output shaft of a drive machine such as an engine and a driven side disk connected to an input shaft of a driven machine such as a generator. A spring-type elastic shaft coupling that accommodates a coil spring and a spring mechanism composed of a drive-side spring bearing supporting both ends of the coil spring and a driven-side spring bearing in a plurality of cavities that are formed at intervals along the space. The supporting surface of the drive side disk with which the back surface of the side spring bearing contacts and the supporting surface of the driven side disk with which the back surface of the driven side spring bearing contacts are subjected to surface hardening treatment such as hard chrome plating, carburizing and nitriding. A spring type elastic shaft coupling characterized by the above.

The drive-side spring bearing and the driven-side spring bearing can be made of a material having a hardness lower than that of the supporting surface.

The gist of the third invention is that the outer circumference of a drive side disk connected to an output shaft of a drive machine such as an engine and a driven side disk connected to an input shaft of a driven machine such as a generator. A spring-type elastic shaft coupling that accommodates a coil spring and a spring mechanism composed of a drive-side spring bearing supporting both ends of the coil spring and a driven-side spring bearing in a plurality of cavities that are formed at intervals along the space. A spring characterized in that the side spring receiver and the driven side spring receiver are divided into a spring seat portion and a stopper portion and manufactured separately, and the spring seat portion and the stopper portion are detachably coupled by press fitting, screwing or the like. Type elastic shaft coupling.

[0016]

According to the present invention, when an impact load is applied by the torsional vibration of the engine or the like, noise due to the collision of the front end faces of the driving side spring bearing and the driven side spring bearing facing each other, and the noise of these tip faces. Wear and damage are suppressed or prevented by the buffer mechanism.

In the inventions of claims 4 and 5, even if a shock load is repeatedly applied to the support surface of the drive side disk and the support surface of the driven side disk, the support surface is subjected to surface hardening treatment. The wear and damage can be suppressed or prevented.

In the sixth aspect of the invention, the stopper portion can be reused by replacing only the spring seat portion.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT One embodiment of the present invention is shown in FIGS. 1 (A), (B), and (C) are enlarged front views of a spring mechanism of a spring type elastic shaft coupling, respectively, and FIG. 2 (A) is a partial cross-sectional view of the coil spring type elastic shaft coupling along an axial center line. FIG. 2B is a partial sectional view taken along the line BB of FIG. 2A.

In FIG. 2A, 10 is an output shaft of the engine, 20 is an input shaft of the generator, 11 is a flywheel fastened to the output shaft 10 by bolts 12, 13 is a drive side disk, and 14 is a drive side disk.
Is an auxiliary disk. The drive side disc 13 and the auxiliary disc 14 are detachably fastened to the flywheel 11 by a plurality of fastening bolts 15 arranged at intervals along the circumferential direction.

Reference numeral 21 is a driven side disk, which is fastened to the connecting shaft 22 by a plurality of bolts 23, and the connecting shaft 22 is fastened to the input shaft 20 by bolts 24.

Reference numerals 31a and 31b are coil springs, 32 is a drive-side spring bearing, and 33 is a driven-side spring bearing, which constitute a spring mechanism. Spring mechanism is drive side disc
13, a plurality of auxiliary discs 14 and driven-side discs 21 are housed in cavities 40 having an oval cross section, which are divided into a plurality of compartments at equal intervals along the outer periphery thereof. This space 40 is an auxiliary disk 14
It is covered with an annular inspection cover 84 that is detachably fastened by a bolt 85.

The coil springs 31a and 31b are arranged in parallel, one end of each of the coil springs 31a and 31b is supported by the driving side spring bearing 32, and the other end is supported by the driven side spring bearing 33. The arc-shaped back surface of the drive-side spring bearing 32 contacts the arc-shaped support surface 51 formed on the drive-side disk 13 and the auxiliary disk 14 as clearly shown in FIG. Is an arcuate support surface 52 formed on the driven disk 21.
Is in contact with.

As shown in FIG. 1 (A), the drive side spring receiver 32 comprises a stopper portion 32a and a spring seat portion 32b.
A cushioning material 41 made of an elastic member such as rubber or rubber is attached to the tip end surface of 32a and the outer peripheral surface of the tip end portion by baking or adhesion. Further, the driven-side spring receiver 33 has a stopper portion 33.
A buffer member 42 made of an elastic member such as rubber or rubber is attached to the tip end surface of the stopper portion 33a and the outer peripheral surface of the tip end portion by baking and bonding. 101 is a screw used to pull out the drive side spring receiver 32, 1
Reference numeral 02 denotes a screw used when the driven-side spring bearing 33 is pulled out.

However, when the driving side disk 13 is abruptly displaced in the direction of arrow Z in FIG. 2B due to the torsional vibration of the engine, and the impact load F acts on the driving side spring bearing 32,
The drive-side spring bearing 32 is pushed toward the support surface 51 to move the driven-side spring bearing 33.
The coil springs 31a and 31b are compressed and absorb this shock displacement, and the driven side disk 21
To be suppressed.

When the compression amount of the coil springs 31a, 31b reaches about 70% of the free length, that is, reaches a predetermined value, the stopper portion
Buffer material 41 at the tip of 32a and buffer material at the tip of stopper 33a
The gap S between the coil springs 31a and 31b disappears, and the cushioning members 41 and 42 contact each other to prevent the coil springs 31a and 31b from being compressed any more, thereby preventing the coil springs 31a and 31b from being damaged. When the cushioning materials 41 and 42 collide with each other, the impact load is alleviated by the elastic deformation of the cushioning materials 41 and 42, and noise is suppressed or prevented. In addition, the cushioning materials 41, 42 on the outer peripheral surfaces of the tips of the stoppers 32a, 33a.
Reduces wear on the inner peripheral surface of the coil springs 31a and 31b when the coil springs 31a and 31b expand and contract.

As shown in FIG. 1B, the cushioning material 42 can be attached only to the stopper portion 33a of the driven-side spring bearing 33, and as shown in FIG. Can also be fitted and attached to the tip surface of the stopper portion 33a by an eyelet structure.

FIG. 3 shows another embodiment of the present invention. In FIG. 3, reference numeral 60 denotes a dashpot mechanism, which is interposed between a cylindrical portion 32d formed in the driving side spring bearing 32 and a cylindrical portion 33d formed in the driven side spring bearing 33.

The inside of the cylinder 69 of this dashpot mechanism is divided into two oil chambers 63 and 64 by a piston 61b. A viscous fluid such as silicon oil is enclosed in the oil chambers 63 and 64, and the oil chambers 63 and 64 are communicated with each other through a small diameter oil passage 61c formed in the piston 61. Further, a cushioning material 65 such as rubber or rubber is interposed between the rear surface of the cylinder 69 and the spring seat portion 33b, and rubber, rubber or the like is provided between the spherical tip portion 70 of the rod 61a and the spring seat portion 32b. The cushioning material 66 of FIG. In addition, 67 is a seal.

However, when the impact load F acts due to the torsional vibration of the engine, the rod 61a and the piston 61b are pushed to the left to reduce the volume of the oil chamber 63, and the viscous fluid in the oil chamber 63 causes the oil passage 61 to flow. Through and flows into the oil chamber 64. The spring 62 is also compressed according to the movement of the piston 61b.

Therefore, the viscous fluid is squeezed by the oil passage 61c, the coil spring 62 is bent, and the cushioning materials 65 and 66 are used.
The impact load is relaxed by the elastic deformation of the, and the transmission of the impact to the generator is suppressed. Other configurations and operations are similar to those of the first embodiment, and corresponding members are designated by the same reference numerals.

FIG. 4 shows still another embodiment of the present invention. The arcuate support surface 51 formed on the drive side disk 13 and the auxiliary disk 14 that abut on the arcuate back surface of the spring seat portion 32b of the drive side spring receiver 32 and the spring seat portion 33b of the driven side spring receiver 33.
The arcuate support surface 52 formed on the driven-side disk 21 that abuts against the arcuate back surface is subjected to surface hardening treatment such as hard chrome plating, carburizing, induction hardening, and nitriding. The spring seats 32b and 33b are made of a material whose hardness is lower than that of the support surfaces 51 and 52.

In this embodiment, the support surfaces 51 and 52 are surface-hardened to form the spring seat portions 32b and 33b.
Since the material whose hardness is lower than 1, 52 is used, when the impact load F is repeatedly applied, wear and fatigue fracture will not occur in the spring seat portion.
It will occur first in 32b and 33b. Therefore, only the low-priced drive side spring bearing 32 or the driven side spring bearing 33 needs to be replaced, and the high-priced drive side disk 13 and auxiliary disk 1
4, it is not necessary to replace the driven disk 21.

FIG. 5 shows still another embodiment of the present invention. As shown in FIG. 5 (A), the driving side spring receiver 32 is divided into a stopper portion 32a and a spring seat portion 32b, and the spring seat portion 32
The shaft portion 322 protruding from the stopper portion 32a is press-fitted into the fitting hole 321 formed in b so that they can be detached from each other. The fitting hole 321 and the shaft portion 322 may be threaded and screwed together.

FIG. 5 (B) shows a driving side spring receiver 32 formed by connecting two stopper portions 32a to one spring seat portion 32b. Also, in FIG. 5 (C), three stopper parts 32a are shown as one.
A drive-side spring bearing 32 is shown which is connected to the individual spring seat portions 32b. Although not shown, the driven-side spring bearing 33 has the same structure as the driving-side spring bearing 32.

However, the back surface of the spring seat portion 32b is the support surface 51.
If the spring seat portion 32b is removed from the stopper portion 32a and replaced with a new one when it is worn or damaged due to repeated collisions with the conventional stopper portion 32a, the conventional stopper portion 32a can be reused.

Further, in order to change the elastic characteristics of the shaft coupling,
When changing the number and diameter of the coil springs 31a and 31b, it is sufficient to change the stopper portion 32a or the spring seat portion 32b. Furthermore, since the stopper portion 32a and the spring seat portion 32b can be manufactured separately, the stopper portion 32a and the spring seat portion 32b can be manufactured at low cost, and the effect is particularly large when the number of the stopper portions 32a is two or more.

[0038]

According to the first aspect of the present invention, since the buffer mechanism is provided between the drive-side spring receiver and the driven-side spring receiver, the shock load due to torsional vibration is not limited to the coil spring. It can also be mitigated by the mechanism.

Further, in the second aspect of the invention, the noise and impact load generated when the driving side spring bearing and the driven side spring bearing collide with each other are alleviated by the cushioning material, so that the driving side spring bearing and the driven side spring bearing are absorbed. Wear and damage can be prevented.

According to the third aspect of the invention, a large shock absorbing effect can be obtained by the shock absorbing action of the coil spring and the dashpot mechanism.

According to the fourth and fifth aspects of the present invention, wear and damage due to repeated impact loads occur in the drive side and driven side spring bearings and do not occur in the supporting surfaces of the drive side disk and the driven side disk. It is sufficient to replace the inexpensive drive side and driven side spring bearings, and therefore, the maintenance and repair costs of the shaft coupling can be reduced and the service life thereof can be extended.

According to the sixth aspect of the present invention, the drive-side spring bearing and the driven-side spring bearing can be manufactured at low cost, and when the spring seat portion is worn or damaged, only the spring seat portion needs to be replaced to re-install the stopper portion. Since it can be used, maintenance and repair costs of the shaft coupling can be reduced. Further, it is possible to easily deal with the change of the elastic characteristic of the shaft coupling by replacing the stopper portion or the spring seat portion.

[Brief description of drawings]

1 (A), (B), and (C) are enlarged front views of a spring mechanism of a spring type elastic shaft coupling according to an embodiment of the present invention.

2A and 2B show a spring type elastic shaft coupling according to an embodiment of the present invention, in which FIG. 2A is a partial sectional view taken along a shaft core line, and FIG.
3 is a partial cross-sectional view taken along line BB of FIG.

FIG. 3 is an enlarged front view corresponding to FIG. 1 showing another embodiment of the present invention.

FIG. 4 is a partially enlarged front view showing a spring mechanism according to still another embodiment of the present invention.

5 (A), (B), and (C) are exploded perspective views of driving-side spring bearings according to still another embodiment of the present invention.

6A and 6B show a conventional spring type elastic shaft coupling, in which FIG. 6A is a partial sectional view taken along a shaft core line, and FIG. 6B is an enlarged sectional view of a spring mechanism.

[Explanation of symbols]

 10 Output shaft 20 Input shaft 11 Flywheel 13 Drive side disc 14 Auxiliary disc 21 Driven side discs 31a, 31b Coil spring 32 Drive side spring bearing 32a Stopper portion 32b Spring seat portion 33 Driven side spring bearing 33a Stopper portion 33b Spring seat portion 41 , 42 Buffer material 51, 52 Support surface

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Kasuzaki 3000 Tana, Sagamihara City, Kanagawa Mitsubishi Heavy Industries, Ltd. Sagamihara Plant (72) Inventor Kazuo Ogawa 3000, Tana, Sagamihara, Kanagawa Ichii Sagami High Tech Co., Ltd.

Claims (6)

[Claims] 1. A drive-side disk connected to an output shaft of a drive machine such as an engine and a driven-side disk connected to an input shaft of a driven machine such as a generator are partitioned along the outer circumference of the drive-side disk. In a spring type elastic shaft coupling that accommodates a coil spring and a spring mechanism consisting of a drive side spring receiver supporting both ends of the coil spring and a driven side spring receiver in a plurality of cavities, the drive side spring receiver and the driven side spring receiver are provided. A spring type elastic shaft joint characterized in that a buffer mechanism is provided between the coil spring and the coil spring. 2. The spring type elasticity according to claim 1, wherein the cushioning mechanism is made of a cushioning material such as rubber or rubber fixed to opposite end surfaces of the driving side spring receiver and the driven side spring receiver. Shaft coupling. 3. The spring type elastic shaft coupling according to claim 1, wherein the buffer mechanism is a dashpot mechanism in which a viscous fluid such as silicon oil is enclosed in a fluid chamber. 4. A drive-side disc connected to an output shaft of a drive machine such as an engine and a driven-side disc connected to an input shaft of a driven machine such as a generator are partitioned and formed along the outer periphery of the driven-side disc. In a spring type elastic shaft coupling which accommodates a coil spring and a spring mechanism composed of a drive side spring receiver supporting both ends of the coil spring and a driven side spring receiver in a plurality of cavities, the back surface of the drive side spring receiver contacts A spring type elastic shaft characterized in that the supporting surface of the driven side disk and the back surface of the driven side spring bearing contact the supporting surface of the driven side disk, which has been subjected to surface hardening treatment such as hard chrome plating, carburizing and quenching, and nitriding Fittings. 5. The spring type elastic shaft coupling according to claim 4, wherein the drive-side spring bearing and the driven-side spring bearing are made of a material having a hardness lower than that of the supporting surface. 6. A drive-side disk connected to an output shaft of a driving machine such as an engine and a driven-side disk connected to an input shaft of a driven machine such as a generator are partitioned and formed along the outer circumference of the driven-side disk. In a spring type elastic shaft coupling that accommodates a coil spring and a spring mechanism composed of a driven side spring bearing supporting both ends of the coil spring in a plurality of cavities, the driving side spring bearing and the driven side spring bearing are A spring type elastic shaft coupling, characterized in that the spring seat portion and the stopper portion are separately manufactured and the spring seat portion and the stopper portion are detachably coupled by press fitting, screwing or the like.