JPH0144832Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a torque buffer device used in an automobile window glass lifting device.

Conventionally, as the above-mentioned torque buffer device, those shown in FIGS. 1 and 2 have been used.

That is, 1 is a casing, 2 is a lid, 3 is an input side gear, 4 is a rubber elastic ring, 5 is an output shaft, 6 is a bearing, 7 is a transmission plate, 8 is an output pinion, and the transmission plate 7 and the output The shaft 5 is connected with a coupling fitting A and fixed with a nut 5b, and the rotation on the input side, which is decelerated from the electric motor through a worm (not shown), is transmitted to the gear 3 - elastic ring 4 - transmission plate 7. -Joining metal fittings A
- Output shaft 5 - When transmitted to the output pinion 8, the elastic ring body 4 buffers sudden torque at the time of starting and stopping the electric motor.

As shown in the figure, the coupling fitting A for connecting the transmission plate 7 and the output shaft 5 is made by punching out a circular plate 9 from a thick plate, having a square hole 10 in the center, and three bent legs on the periphery. A piece 11 is provided, and the square hole 10 is fitted into the square shaft portion 5a of the output shaft 5.
1 is fitted into the receiving hole of the transmission plate 7, but this coupling fitting A is heavy and
The leg piece 11 is weak against twisting, and the punched side surface is rough and not smooth, which causes deformation and wear on the mating member that comes into contact with that surface.

This invention was made to solve the above problem.

Hereinafter, this invention will be explained in detail based on drawings showing an example of its implementation.

What is shown in FIGS. 3 to 6 is one example, and members that are the same or similar to those shown in FIGS. 1 and 2 are given the same reference numerals.

That is, 1 is a casing, 2 is a lid, 3 is an input gear, 4 is a rubber elastic ring, 5 is an output shaft, 6 is a bearing, 7 is a transmission plate, 8 is an output pinion, and B
is a coupling fitting A that connects the transmission plate 7 and the output shaft 5.

The coupling fitting B is press-formed by punching from a thin plate, and includes a circular flat plate 12, a triangular square hole 13 provided in the center thereof, and a shroud plate 14 that bends and stands up integrally from the edge of the square hole. Circular flat plate 12
three protruding plates 15 extending in the radial direction from the same central angle portion of the periphery of the plate; and a shrouding plate 16 that bends and stands up integrally from the side edges of the protruding plates 15 and the periphery of the circular flat plate 12 on the opposite side of the shrouding plate 16. It is formed of.

On the other hand, the transmission board 7 has a concave portion 1 that receives the circular flat plate 12 and the extension plate 15 of the coupling fitting B.
7, and a triangular square hole 18 for receiving the triangular shroud plate 14 of the coupling fitting B is bored in the center thereof.

There are three grooves 4a and 4b on both upper and lower sides of the rubber elastic ring body 4, respectively. A standing plate 3a protruding from the input gear 3 is fitted into the lower groove 4a, and the upper groove A vertical plate 7a protruding from the lower surface of the transmission plate 7 is fitted into the transmission plate 4b, so that the rotation of the input gear 3 can be transmitted to the transmission plate 7.

In the torque buffer device constructed as described above, the coupling fitting B is used as shown in FIG. 3. That is, the circular flat plate 12 and the extension plate 15 forming the coupling fitting B are fitted into the concave portion 17 of the transmission plate 7 together with the shroud plate 16,
The triangular shroud plate 14 is inserted into the triangular square hole 18 of the transmission board 7.
The transmission disk 7 and the output shaft 5 are connected via the coupling fitting B by fitting the triangular square shaft portion 5a of the output shaft 5 into the triangular square hole 13 of the coupling fitting.

Therefore, when the coupling fitting B is used, the three protruding plates 15, which are particularly effective in transmitting torque, are brought into contact with the transmission plate side through the shroud plate 16 that stands up from the edges, and the square shaft of the output shaft is A circular plate 1 is provided in the portion 5a.
Since the shroud 16 standing up from 2 is brought into contact with the metal fitting, it has the advantage of providing a large torque transmission area and a strong bonding force even though it is a thin plate metal fitting. The contact surface is
Since it is not a punched side surface of a thin plate, but a smooth plate surface that bends and stands upright, there is no risk of deformation and wear on the mating member, and when it comes to the fitting itself,
The weight of materials and costs can be reduced.

In addition, in the illustrated example, the circular flat plate 12 of the coupling fitting is
The square hole 13 is triangular, but it could also be a square hole, and the veneer 15 extending from the circular flat plate 12 would be unstable if it had two holes, and it would be complicated if it were four or more holes, so it could be made by having three holes. It is appropriate to do so.

As described above, according to this invention, the output shaft is fitted and supported in the casing, and the output shaft portion that protrudes into the casing is provided with an input side gear, a ring made of an elastic material such as rubber, and a transmission disk. are fitted in an overlapping manner, the transmission disk and the input shaft are connected by a coupling fitting, the rotation of the input side gear is transmitted from the elastic ring to the transmission disk, and then output from the transmission disk via the coupling fitting. In the torque buffering device that is transmitted to the shaft, the coupling fitting includes a circular flat plate having a square hole in the center, a projecting plate integrally protruding in the radial direction from a plurality of parts on the periphery of the circular plate, and a protruding plate integrally bent and standing up from the edge of the square hole. and a shroud that bends and stands up from the side edge of the projecting plate and the periphery of the circular flat plate, and the transmission board is formed with a recess for receiving the coupling fitting, and the rectangular shape of the coupling fitting is formed with a recess for receiving the output shaft. Since the rectangular shaft portion is fitted, even if the coupling fitting is made of a thin plate, a large torque transmission area and strong bonding force can be obtained, and there is no risk of deformation and wear on other mating members to the coupling fitting. This has a remarkable effect on improving the reliability of this type of torque buffer device, as it can contribute to reducing the weight and increasing the strength of the coupling fitting itself.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a conventional torque buffer device, Fig. 2 is a perspective view of a coupling fitting, Fig. 3 is a longitudinal sectional side view of a torque buffer device showing an embodiment of this invention, and Fig. 4 is a longitudinal sectional view of a conventional torque buffer device.
5 is a perspective view of the coupling fitting, FIG. 5 is a perspective view of the transmission plate, and FIG. 6 is a perspective view of the combined input gear and elastic ring. DESCRIPTION OF SYMBOLS 1... Casing, 2... Lid, 3... Input side gear, 4... Elastic ring, 5... Output shaft, 5a... Square shaft portion, 6... Bearing, 7... Transmission plate, 8... ...output pinion, A...conventional coupling fitting, B...coupling fitting of this invention, 12...circular flat plate, 13...square hole, 14...shrouding plate, 15...projection plate, 16...shrouding plate , 17... recess, 18... square hole.

Claims (1)

[Scope of utility model registration request] The output shaft is fitted and supported in the casing, and the input side gear, a ring made of an elastic material such as rubber, and a transmission disk are fitted in an overlapping manner to the output shaft part that protrudes into the casing, and the transmission disk and input In the torque buffer device, the rotation of the input side gear is transmitted from the elastic ring to the transmission plate, and further transmitted from the transmission plate to the output shaft via the coupling fitting, the coupling fitting is connected to the shaft by a coupling fitting. , a circular flat plate with a square hole in the center, a protruding plate integrally protruding in the radial direction from multiple parts of its periphery, a shroud plate bent and standing up integrally from the edge of the square hole, a side edge of the protruding plate, and a circular flat plate. and a shroud that bends and stands up from the periphery of the transmission plate, and the transmission board is formed with a recess for receiving the coupling fitting, and the square shaft portion of the output shaft is fitted into the square coupling fitting. Torque buffer device.