JPH0554828U - Coupling - Google Patents

Abstract

(57) [Abstract] [Purpose] The purpose is to improve durability by providing a low spring when a small torque is input to improve the damping property against the input vibration and to have a high rigidity when a large torque is input. And [Structure] A damper portion 3 formed in a bellows shape by alternately providing peaks 6 and valleys 7 between a protrusion 4 of a first plate 1 and a protrusion 5 of a second plate 2 is interposed. Then, the first plate 1 is connected to the drive-side shaft and the second plate 2 is connected to the driven-side shaft. When a small torque is input,
When the damper portion 3 expands and contracts in the rotational direction to obtain a soft spring constant, and when a large torque is input, the damper portion 3 is compressed by both the protruding portions 4 and 5, and the adjacent mountain portion 6 and the mountain portion 6 are adjacent to each other. The close contact with the portion 6 increases the spring constant of the damper portion 3 and increases the overall rigidity.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a coupling, and more particularly to a coupling effectively used in a power transmission section of an automobile or the like.

[0002]

[Prior art and its problems]

 Generally, a coupling provided between the drive-side shaft and the driven-side shaft to integrally connect the two and to transmit the driving-side torque to the driven-side is shown in FIG. As described above, the disk-shaped plate 21 is integrally connected to either one of the drive side shaft and the driven side shaft, and the damper portion 23 is integrally connected to the other side shaft. .

A mounting hole 27 is formed in the central portion of the plate 21, and a hole 22 penetrating from one side to the other side is formed on the concentric circle of the peripheral portion of the hole 27. A plurality of holes are provided at predetermined intervals, and the damper portion 23 is provided in the hole 22.

The damper portion 23 is formed by integrally connecting a cylindrical outer ring 26 to the outside of a cylindrical inner ring 24 via a rubber-like elastic body 25.

Then, the plate 21 of the coupling configured as described above is integrally formed on the drive-side shaft or the driven-side shaft (in this case, the drive-side shaft) through the hole 27 at the center thereof. The inner ring 24 of each damper portion 23 fitted in each hole 22 of the plate 21 is integrally connected to the driven-side shaft or the driving-side shaft (in this case, the driven-side shaft) by bolts. When the drive-side shaft is connected and the drive-side shaft is rotated, the plate 21 integrally connected to the drive-side shaft and the drive-side shaft integrally rotates, and the rotation of the plate 21 causes the damper portion 23 to rotate. By being transmitted to the driven-side shaft via the shaft, the driven-side shaft rotates integrally with the drive-side shaft.

When a vibration is input from the drive shaft in the above process, the vibration is absorbed by the rubber-like elastic body 25 of each damper portion 23. In this case, the rubber-like elasticity is generated. The lower (softer) the spring constant of the body 25 is, the higher the damping property against vibration is.

However, when the spring constant of the rubber-like elastic body 25 is made too low, the damping property against vibration is enhanced, but when a large torque is input, the rubber-like elastic body 25 exceeds the allowable limit. There is a problem in that the durability is remarkably reduced because it is greatly deformed and damaged, or it is settled.

On the other hand, in order to solve the above-mentioned problems, when the spring constant of the rubber-like elastic body 25 of the damper portion 23 is set high, the rubber-like elastic body 25 is set even when a large torque is input. Since the rigidity of the rubber-like elastic body 25 can be increased, damage and sag of the rubber-like elastic body 25 can be prevented and durability can be improved. However, by increasing the spring constant of the rubber-like elastic body 25, There was a problem that the damping property against vibration was significantly reduced.

The present invention solves the above-mentioned problems of the conventional ones, and is capable of exhibiting an excellent damping property with respect to the input vibration, and at the same time, even when a large torque is input, the rubber is used. An object of the present invention is to provide a coupling having excellent durability, in which there is no risk of breakage or fatigue of the elastic body.

[0010]

[Means for solving problems]

 In order to solve the above problems, the present invention is a coupling for integrally connecting a drive-side shaft and a driven-side shaft to transmit driving-side torque to the driven-side. A first plate integrally connected to either one of the shaft and the driven shaft, a second plate integrally connected to the other shaft, and the first plate and the first plate. And a damper portion that is provided between the two plates and integrally connects the two plates, and the damper portion is formed in a bellows shape as a whole by alternately providing peak portions and valley portions, When the input torque is small, the damper part expands and contracts to obtain a low spring, and when the input torque is large, the damper part is compressed and the adjacent ridges and ridges are in close contact with each other. By adopting this method, a high spring can be obtained. It is intended. Further, the damper part employs a means that it is provided at a plurality of positions between the first plate and the second plate, and a resin is provided in a valley part of the damper part. A plate made of metal is provided, a lubricant is provided in the valley of the damper part, and a resin coating film is formed on the inner peripheral surface of the second plate. Is.

[0011]

[Action]

 By adopting the above-mentioned means, this device obtains a soft spring constant by the elastic deformation of the bellows-shaped damper part when the vibration is input from the drive-side shaft. Therefore, it is possible to exhibit an excellent damping property against the input vibration, and when a high torque is input, the damper part compresses between the first plate and the second plate. Since the adjacent peaks and the peaks are in close contact with each other, a high spring constant can be obtained, so that the overall rigidity is increased.

[0012]

【Example】

 An embodiment of the present invention shown in the drawings will be described below. FIG. 1 shows a first embodiment of a coupling according to the present invention. The coupling according to this embodiment includes an annular first plate 1 integrally connected to a drive shaft. A second plate 2 that is integrally connected to the driven shaft and that is located on the outer peripheral side of the first plate 1 with a predetermined gap, the first plate 1 and the second plate 2. A damper portion 3 is provided between the plate 2 and the plate 1 to integrally connect the plates 1 and 2 together.

A mounting hole 8 is formed in the central portion of the first plate 1, and a plate-shaped projecting portion 4 projecting radially outward is provided at an appropriate position on the outer peripheral surface. Is integrally provided, and a plate-shaped projecting portion 5 projecting radially inward is integrally provided at an appropriate position on the inner surface of the second plate 2. The damper part 3 is provided between the four and five parts.

The damper portion 3 has peak portions 6 and valley portions 7 alternately provided at predetermined intervals, and is formed in a bellows shape as a whole, and one end thereof has a protruding portion of the first plate 1. The other end is fixed to the projecting portion 5 of the second plate 2 so that it can be expanded and contracted in the rotational direction while being held between the projecting portions 4 and 5.

The damper part 3 may be provided only at one place between the first plate 1 and the second plate 2, and is provided at a plurality of places although not shown. It is also good to set the installation location according to the application.

Then, the first plate 1 of the coupling configured as described above is integrally connected to the drive-side shaft through the hole 8 in the central portion thereof, and at the same time as being connected to the outer side of the first plate 1. When the second plate 2 located is integrally connected to the driven shaft and the drive shaft rotates, the first plate 1 rotates integrally with the drive shaft, and the first plate 1 rotates. The rotation of the gate 1 is transmitted to the second plate 2 via the damper portion 3 and is transmitted to the driven shaft integrally connected to the second plate 2 from the second plate 2. In this way, the driven shaft rotates together with the driving shaft, and the driving torque is transmitted to the driven shaft.

When vibration is input from the shaft on the drive side in such a process, the vibration is caused by the damper portion 3 which integrally connects the first plate 1 and the second plate 2 in the rotation direction. It is absorbed by expanding and contracting, and in this case, since the damper part 3 is formed in a bellows shape by alternately providing the peaks 6 and the valleys 7 as described above, the damper constant 3 Becomes extremely soft, and therefore, it is possible to exhibit excellent damping properties against the input vibration.

On the other hand, when a large torque is input, the damper portion 3 is protruded from the first plate 1 side due to the relative displacement of the first plate 1 and the second plate 2 in the rotation direction. The protrusion 4 of the second plate 2 is compressed between the protrusions 4 and the adjacent peaks 6 and the adjacent peaks 6 are in close contact with each other, thereby increasing the spring constant of the damper 3. Become. Therefore, the rigidity of the damper portion 3 can be increased, and the large torque to be input can be sufficiently endured, so that the damper portion 3 can be prevented from being damaged or settling. Become.

As described above, in the coupling according to the present embodiment, when a small torque is input, a soft spring constant is obtained by the expansion and contraction deformation of the damper portion 3 in the rotation direction, and a large spring constant is obtained. When torque is input, the damper part 3 is compressed and the peaks 6 come into close contact with each other, so that a high spring constant can be obtained. On the other hand, excellent damping properties can be exhibited, and the damper part 3 can be prevented from being damaged when a large torque is input, so that durability can be improved.

In the above description, the first plate 1 is connected to the drive-side shaft and the second plate 2 is connected to the driven-side shaft. However, the first plate 1 is connected to the driven-side shaft. In addition, the second plate 2 may be connected to the drive side shaft.

FIG. 2 shows a second embodiment of the coupling according to the present invention. In the coupling shown in this embodiment, a resin plate 9 is provided in the valley portion 7 of the damper portion 3. Since the other parts are the same as those shown in the first embodiment, the same parts as those shown in the first embodiment are designated by the same reference numerals. Then, detailed description of the configuration will be omitted.

The coupling shown in this embodiment also exhibits the same action and effect as those shown in the first embodiment, and when a small torque is input, the rotation of the damper section 3 is rotated. A soft spring constant can be obtained by the expansion and contraction in the direction, and when a large torque is input, the damper part 3 is compressed and the gap between the peaks 6 is made through the resin plate 9. By closely contacting, a high spring constant can be obtained. Therefore, it is possible to exhibit excellent damping properties against vibrations generated when a small torque is input, and it is possible to prevent damage to the damper part 3 when a large torque is input and improve durability. Become.

Further, in the coupling shown in this embodiment, since the resin plate 9 is provided in the valley portion 7 of the damper portion 3, the damper portion 3 is expanded and contracted when the damper portion 3 is deformed. The ridges 6 and 6 do not come into direct contact with each other and wear.

FIG. 3 shows a third embodiment of the coupling according to the present invention. The coupling shown in this embodiment has a lubricant 10 such as grease in the trough 7 of the damper portion 3. Since the other components are the same as those shown in the first embodiment, the same parts as those shown in the first embodiment are designated by the same reference numerals. The detailed description of the configuration will be omitted.

The coupling shown in this embodiment also exhibits the same action and effect as those shown in the first embodiment, and when a small torque is input, the rotation of the damper part 3 is rotated. A soft spring constant is obtained by expansion and contraction in the direction, and when a large torque is input, the damper part 3 is compressed and the gap between the peaks 6 is made to pass through a lubricant 10 such as grease. A high spring constant can be obtained by closely contacting with each other. Therefore, it is possible to exhibit excellent damping properties against vibrations generated when a small torque is input, and it is possible to prevent the damper part 3 from being damaged when a large torque is input, thereby improving durability. become.

Further, in the coupling shown in this embodiment, since the lubricant 10 such as grease is provided in the valley portion 7 of the damper portion 3, when the damper portion 3 expands and contracts, the peak portion is formed. It is possible to prevent the occurrence of wear due to the direct contact between the ridge 6 and the mountain portion 6.

FIG. 4 shows a fourth embodiment of the coupling according to the present invention. The coupling shown in this embodiment has a resin coating on the inner peripheral surface side of the second plate 2. Since the film 11 is formed and the other structure is similar to that shown in the first embodiment, the same parts as those shown in the first embodiment will be described. The same numbers are assigned and detailed description of the configuration is omitted.

The coupling shown in this embodiment also exhibits the same action and effect as those shown in the first embodiment, and when a small torque is input, the rotation of the damper portion 3 A soft spring constant can be obtained by expansion and contraction in the direction, and when a large torque is input, the damper part 3 is compressed and the peaks 6 come into close contact with each other, so that a high spring is obtained. A constant will be obtained. Therefore, it is possible to exhibit an excellent damping property against the vibration generated when a small torque is input, and it is possible to prevent the damper part 3 from being damaged when a large torque is input, thereby improving the durability. .

Further, in the coupling shown in this embodiment, since the resin coating film 11 is formed on the inner peripheral surface side of the second plate 2, when the damper portion 3 expands and contracts. Even when the outer peripheral surface side of the damper portion 3 comes into contact with the inner peripheral surface side of the second plate 2, the friction coefficient between the two can be made small, so that the wear of the damper portion 3 can be suppressed as much as possible. It is a thing.

[0030]

[Effect of the device]

 With this configuration, the soft spring constant can be obtained by the expansion and contraction deformation of the damper part in the rotation direction when the input torque is small. Therefore, the vibration generated when a small torque is input is obtained. Therefore, it is possible to exhibit excellent damping characteristics. Also, when the input torque is large, the damper part is compressed and deformed, and the adjacent crest parts come into close contact with each other, which increases the spring constant of the damper part. The rigidity of the part can be increased, and a large torque can be sufficiently endured. Therefore, it is possible to exhibit excellent damping properties against the input vibration, and it is possible to make the entire structure highly rigid at the time of inputting a large torque, which has an excellent effect such as improving durability. It is a thing.

[Brief description of drawings]

FIG. 1 is a schematic view showing a first embodiment of a coupling according to the present invention.

FIG. 2 is a schematic view showing a second embodiment of the coupling according to the present invention.

FIG. 3 is a schematic view showing a third embodiment of the coupling according to the present invention.

FIG. 4 is a schematic view showing a fourth embodiment of the coupling according to the present invention.

FIG. 5 is a schematic view showing a conventional coupling.

[Explanation of symbols]

 1 ... 1st plate 2 ... 2nd plate 3, 23 ... Damper part 4, 5 ... Projection part 6 ... Mountain part 7 ... Valley part 8, 22, 27 ... Hole 9 ... Resin Made plate 10 …… Lubricant 11 …… Coating film 21 …… Plate 24 …… Inner ring 25 …… Rubber-like elastic body 26 …… Outer ring

Claims (5)

[Scope of utility model registration request] 1. A coupling for integrally connecting a drive-side shaft and a driven-side shaft to transmit drive-side torque to the driven-side shaft, which is either the drive-side shaft or the driven-side shaft. A first plate (1) integrally connected to one of the shafts;
The first plate (1) and the second plate (2), which are integrally connected to the other shaft, are provided between the first plate (1) and the second plate (2). 2) A damper part (3) integrally connecting the two parts is provided, and the damper part (3) is formed in a bellows shape as a whole by alternately providing peak parts (6) and valley parts (7). When the input torque is small, the damper part (3) is expanded and contracted to obtain a low spring, and when the input torque is large, the damper part (3) is compressed and the adjacent peaks are compressed. A coupling characterized in that a high spring can be obtained by bringing the portion (6) and the mountain portion (6) into close contact with each other. 2. The coupling according to claim 1, wherein the damper portion (3) is provided at a plurality of positions between the first plate (1) and the second plate (2). 3. The coupling according to claim 1, wherein a resin plate (9) is provided in the trough (7) of the damper portion (3). 4. Coupling according to claim 1, wherein a lubricant (10) is provided in the troughs (7) of the damper part (3). 5. The coupling according to claim 1, wherein a resin coating film (11) is formed on the inner peripheral surface of the second plate (2).