JPH0732987Y2 - Elastic coupling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an elastic coupling, and more particularly to an elastic coupling that is easy to manufacture.

[Prior art and its problems]

Conventionally, for example, it is provided between a propeller shaft and a differential of an automobile or the like to transmit the driving force of the propeller shaft to the differential and to absorb so-called rotational noise between the two to reduce so-called differential noise generated in the differential. In the elastic coupling described above, the structure of each component is complicated, so that it takes time and labor to process the structure, and there is a problem in that it is not easy to manufacture.

The present invention solves the above-mentioned problems of the conventional one, and an object thereof is to provide an elastic coupling that can be easily manufactured by simplifying the structure of individual components. It is what

[Means for solving problems]

In order to achieve the above object, the present invention is an elastic coupling that is provided between a drive-side shaft and a driven-side shaft to connect the two and to transmit a driving force. Disk-shaped hub that is connected to either the shaft of the driven side or the driven side and is provided with protrusions at predetermined intervals over the entire circumference of one side surface, and the driven side shaft or the drive side. And a disc-shaped stopper provided with a groove portion for positioning the protrusions of the hub at predetermined intervals over the entire circumference of the outer peripheral surface, while being connected to the other of the shafts,
In addition to providing recesses on both side surfaces of the groove portion, on the circumferential side surface of the projecting portion of the hub, there are projections located at predetermined intervals in the recesses on both side surfaces of the groove portion at the tip end in the circumferential direction. It adopts a means in which a rubber material is integrally provided.

[Action]

By adopting the above means in this invention, the torque from the drive side shaft is transmitted to the driven side shaft via the hub, the rubber material and the stopper.

〔Example〕

 An embodiment of the present invention shown in the drawings will be described below.

1 to 3 show an embodiment of an elastic coupling according to the present invention, and FIG. 1 is a schematic view showing the whole,
2 is a sectional view taken along line XX of FIG. 1, and FIG. 3 is a partial perspective view of what is shown in FIG.

That is, the elastic coupling is integrally provided on the hub 1 and the hub 1 connected to the drive side shaft (propeller shaft), the stopper 3 connected to the driven side shaft (differential), and It is composed of a rubber material 6 located between the hub 1 and the stopper 3.

The hub 1 has a disc shape, and a tubular portion 14 is integrally provided at the center of one side surface of the hub.
A screw portion 15 is formed at the tip of the outer peripheral surface of 14, and further,
A plurality of substantially fan-shaped projections 2, 2, ... Are integrally provided at predetermined intervals on the outer side in the radial direction of the tubular portion 14, and the projections 2, 2 ,. Screw holes 9,
9, ... are provided.

The stopper 3 has a disk shape, a bearing hole 16 is formed in the center thereof, and the outer peripheral surface has a plurality of substantially fan-shaped groove portions 4, 4, ... ... are provided, and recesses 5 and 5 are formed on both side surfaces inside the groove portions 4, 4, ..., and further, holes 8 for bolt insertion are formed between the groove portions 4 and 4. It is set up.

The rubber material 6 has a convex shape and is integrally provided on both side surfaces of the protrusion 2 of the hub 1 by vulcanization adhesion or the like. In this case, the tip end of the protrusion 7 of the rubber material 6 is the stopper. 3 is located in the recess 5 in the groove 4.

Then, in order to assemble the hub 1 and the stopper 3 configured as described above integrally, the thrust bearing 12 is provided on the outer periphery of the cylindrical portion 14 at the center of the hub 1, and the radial bearing 10 is provided in the hole 16 at the center. Install the stopper 3 and the thrust bearing 11 in this order, and from the outside, thread the threaded portion of the tip of the tubular portion 14.
The stopper 3 is integrally attached to the hub 1 by screwing the nut 13 onto the hub 15.

In this case, the stopper 3 is attached to the hub 1 so that the protrusions 2, 2, ... Of the hub 1 are located in the grooves 4, 4 ,.
Attach.

By attaching the stopper 3 to the hub 1 in this manner, the protrusions 7 and 7 of the rubber materials 6 and 6 that are integrally provided on the protrusion 2 of the hub 1 are formed in the recesses 5 and 5 of the groove 4 of the stopper 3, respectively. Will be located inside.

Therefore, in this state, the hub 1 and the stopper 3 are relatively rotatable within a range in which the upper surface 7a of the protrusion 7 of the rubber material 6 abuts the bottom surface 5a of the recess 5 of the stopper 3.

Next, the operation of the above-described one will be described.

First, a bolt (not shown) is screwed into the screw holes 9, 9, ... of the hub 1 from the drive side shaft (propeller shaft) to form the drive side shaft (propeller shaft). The hub 1 is integrally connected, and a bolt (not shown) is inserted from the driven shaft (differential) into the bolt insertion hole 8 of the stopper 3 and tightened to tighten the driven shaft (differential) and the stopper 3.
And are connected together.

When the drive side shaft (propeller shaft) rotates, the driven side shaft (differential) rotates integrally with the rotation of the drive side shaft (propeller shaft) via the hub 1, the rubber material 6, and the stopper 3. To do.

The rotational fluctuation between the drive-side shaft (propeller shaft) and the driven-side shaft (differential) at this time is absorbed by elastic deformation of the rubber member 6 provided between the hub 1 and the stopper 3. Will be done, and therefore
It is possible to reduce so-called differential noise generated in the driven shaft (differential).

Further, the drive side shaft (propeller shaft) and the driven side shaft (differential) are integrally connected via the radial bearing 10, so that the drive side shaft center and the driven side shaft center should be aligned. Therefore, it is possible to reliably prevent axial runout due to axial misalignment.

When the torsional torque is small, the torque transmission from the drive-side shaft (propeller shaft) is limited only to the upper surface 7a of the protrusion 7 of the rubber member 6 as shown by the cross mark in FIG. By contacting the bottom surface 5a of the recess 5 of 3, the torque transmission is performed in a small area.

When the torsional torque is large, the rubber material 6 is compressed and deformed as shown by the mark X in FIG.
By contacting both the bottom surface 5a and the top surface 5b of the recess 5 of the stopper 3 with both 7a and the bottom surface 7b, torque is transmitted in a large area.

Therefore, the torque from the drive-side shaft (propeller shaft) is smoothly transmitted to the driven-side shaft (differential) via the rubber material 6 without being affected by the magnitude of the torsion torque.

Further, since the rubber material 6 is always present between the protrusion 2 of the hub 1 and the groove 4 of the stopper 3, the side surface of the protrusion 2 of the hub 1 and the side surface of the groove 4 of the stopper 3 are transmitted during torque transmission. It is also possible to reliably prevent noise from being generated by direct collision between and.

As described above, when the elastic coupling according to the present invention is used, it is possible to reduce differential noise in the differential that can reliably absorb the rotational fluctuation between the drive-side shaft (propeller shaft) and the driven-side shaft (differential). In addition to this, it is possible to reliably prevent the generation of noise due to the collision between the protrusion 2 of the hub 1 and the groove 4 of the stopper 3, and the spring characteristics of each rubber member 6 can be sufficiently adjusted according to the magnitude of the torsion torque. Therefore, the torque on the driving side can always be smoothly transmitted to the driven side, and the structure of each component can be simplified, so that the processing of each component can be performed. It will be easier and the whole production will be easier.

[Effect of device]

This invention is configured as described above, and thus the protrusion is provided on one side surface of the hub, the groove is provided on the outer peripheral surface of the stopper and the recess is provided on the side surface, and the stopper is provided on the tip of the protruding portion of the hub. It is sufficient to assemble these parts by providing a rubber material with a protrusion located in the recess of the groove part, so that the structure of each component can be simplified and the workability and assemblability are improved. However, the production as a whole becomes easy.

Further, since the rubber material provided on the protrusion of the hub is elastically deformed, it is possible to absorb the rotational fluctuation between the hub and the stopper, that is, between the drive-side shaft and the driven-side shaft. It is possible to reduce the noise generated at the same time, and it is also possible to prevent the noise from being generated by the protrusion of the hub coming into direct contact with the groove of the stopper.

Further, when the torsional torque is small, the torque transmission from the drive-side shaft is such that the protrusion of the rubber material comes into contact with a part of the inner surface of the recess of the stopper to transmit the torque in a small area. When the torsional torque is large, the projection of the rubber material is compressed and deformed, so that the entire rubber material comes into contact with the entire inner surface of the recess of the stopper, and the torque is transmitted in a large area.

Therefore, it is possible to smoothly transmit the torque from the drive side shaft to the driven side shaft through the rubber material without being affected by the magnitude of the torsional torque. Is.

[Brief description of drawings]

FIGS. 1, 2 and 3 show an embodiment of the elastic coupling according to the present invention, FIG. 1 is a schematic view showing the whole, and FIG. 2 is a sectional view taken along line XX of FIG. Figure, third
The figure shows a partial perspective view of what is shown in FIG. 1, FIG. 4 and FIG.
The figure is an explanatory view showing a state of torque transmission. 1 …… Hub 2 …… Projection 3 …… Stopper 4 …… Groove 5 …… Concave 6 …… Rubber material 7 …… Protrusion 8,16 …… Hole 9 …… Screw hole 10 …… Radial bearing 11,12 ...... Thrust bearing 13 ...... Nut 14 ...... Cylindrical part 15 ...... Screw part

Claims (1)

[Scope of utility model registration request] 1. An elastic coupling which is provided between a drive-side shaft and a driven-side shaft to connect the two and to transmit a driving force, the driving-side shaft or the driven-side shaft. And a disc-shaped hub (1) provided with projections (2) at predetermined intervals over the entire circumference of one side surface, and the driven-side shaft or drive-side hub. A disk-shaped stopper (which is connected to either of the other shafts and is provided with a groove (4) for positioning the protrusions (2) of the hub (1) at predetermined intervals over the entire circumference of the outer peripheral surface ( 3)
And a recess (5) is provided on both side surfaces of the groove (4), and the groove (4) is provided at the circumferential end of the protrusion (2) of the hub (1) in the circumferential direction. The elastic coupling is characterized in that the rubber material (6) having the protrusions (7) located at a predetermined interval is integrally provided in the recesses (5) on both side surfaces of (1).