JPH04124628U - Reinforced structure of synthetic resin pinion - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the strength of synthetic resin pinions. To prevent a synthetic resin pinion to which a reinforcing metal plate is attached from cracking at high or low temperatures, and to prevent the synthetic resin pinion from being damaged. Improve assembly work efficiency. [Structure] A plurality of protrusions 5 as engaging parts are formed on one side of the synthetic resin pinion 1 so as to surround the shaft hole 2. metal plate 1
A plurality of engagement holes 15 are provided at positions facing one of the protrusions 5. The metal plate 15 is attached to the synthetic resin pinion 1 by engaging the protrusion 5 with the engagement hole 15.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a reinforcement structure for synthetic resin pinions. A shaft hole is formed for the shaft to pass through, a gear is formed on the outer periphery, and supplementary parts are formed on the side. This invention relates to a reinforcing structure for a synthetic resin pinion to which a reinforcing metal plate is attached.

0002

[Conventional technology]

For example, power recliners using power motors, which are applied to vehicle seats. In the reclining mechanism, the pinion gear and the recliner are rotated by a motor. The seat back reclines by engaging the pinion gear on the side of the holding device. It is designed to perform the following operations. And in recent years, such pinions have become more economical. Products made of synthetic resin have come to be widely used due to their properties and workability. on the other hand Since the strength of synthetic resin pinions is weak, various reinforcement structures are used. child As a reinforcement structure, a boss part is provided near the shaft hole of the synthetic resin pinion, or a shaft The shaft and shaft hole are formed with a large diameter to increase the contact area between the shaft and the synthetic resin pinion. However, it is subject to layout constraints and does not yet have sufficient strength. Generally, a reinforcing metal plate is inserted into the synthetic resin pinion. It was widely practiced to burn the ground and bury it.

0003

[Problem that the idea aims to solve]

When inserting the metal plate into a synthetic resin pinion, the metal plate and synthetic resin Because the coefficient of thermal expansion and contraction is different from that of the pinion, the metal plate It expands or contracts and presses the contact surface with the synthetic resin pinion, causing the synthetic resin pinion to There was a risk that it would not function effectively due to cracks. In addition, the insert molding process between the synthetic resin pinion and the metal plate is complicated, and This had the disadvantage of increasing processing and molding costs. The purpose of this invention is to significantly improve the strength of synthetic resin pinions, and to Prevents the plastic pinion from cracking and not functioning effectively, improving assembly work efficiency. The purpose of the present invention is to provide a reinforcing structure for a synthetic resin pinion that can improve the performance of the pinion.

0004

[Means to solve the problem]

The present invention was developed in view of the above-mentioned problems, and is Several engaging parts are formed, and a shaft hole for shaft insertion is formed in the center of the reinforcing metal plate. and a plurality of engagement parts on the side surface of the synthetic resin pinion that engage with the side surface of the metal plate. A feature is that an engaging portion is formed.

[0005]

[Effect]

According to the present invention, a plurality of engaging portions formed on the side surface of a synthetic resin pinion, and a Multiple engagements formed on the side of a reinforcing metal plate attached to the side of the resin pinion The strength is similar to that of a synthetic resin pinion with a metal plate inserted. In addition, damage to the synthetic resin pinion due to thermal expansion and contraction of the metal plate, etc. There is no risk of damage, and it can be assembled easily and quickly, improving work efficiency. can.

[0006]

【Example】

The reinforcing structure of the synthetic resin pinion according to the present invention will be explained in detail below with reference to the drawings. FIGS. 1 and 2 show the configuration of an embodiment of the present invention, and are made of polycarbonate resin. Synthetic resin pinion made of synthetic resin such as carbon steel, polypropylene, polyacetal, etc. 1 is a shaft through which a shaft 10 rotatably driven by a power motor or the like is inserted; Hole 2 is formed. A reinforcing metal plate 1 is attached to one side of the synthetic resin pinion 1. 1 is installed. Furthermore, a gear 3 is formed on the outer periphery of the synthetic resin pinion 1. For example, as shown in Figure 4, other pinions, gears, other rack members, etc. As described later, it can be applied, for example, to the reclining mechanism of a vehicle seat. It is designed so that

[0007] On the side where the metal plate 11 of the synthetic resin pinion 1 is attached, there is a hole around the shaft hole 2. A plurality of (eight in this embodiment) protrusions 5 are formed as engaging portions concentrically with the shaft hole 2. has been done. Although this protrusion 5 is formed in a fan shape that expands outward, it is not shown in the figure. It is not limited to the shape of. Also, the position and number of protrusions 5 can be changed as appropriate. Wear. The reinforcing metal plate 11 is formed into a circular shape corresponding to the shape of the synthetic resin pinion 1. A shaft hole 12 through which a shaft 10 is inserted is formed in the center. This shaft hole 12 is formed in the serration part and fits with the shaft 10 to be inserted, and the shaft 10 The rotation of the metal plate 11 is transmitted to the metal plate 11. Further, the metal plate 11 has the above-mentioned A plurality of engagement holes 15 as engagement portions are provided at positions facing the protrusion 5 of the synthetic resin pinion 1. are formed, and by engaging with the protrusions 5, the metal plate 11 becomes a synthetic resin pinion. 1 to transmit the rotation of the shaft 10 to the synthetic resin pinion 1. is being done.

[0008] The engagement hole 15 is shown in FIG. As is clear from the figure, it is formed slightly larger than the protrusion 5 and rotates in the engaged state. Only one side of the protrusion 5 that receives the rolling force is formed so as to come into contact with the side of the engagement hole 15. ing. That is, clearances are provided above and below and on one side of the protrusion 5. still The clearance on one side of this protrusion 5 is the same as that on the other side of the adjacent protrusion 5. The side surface is brought into contact with the side of the engagement hole 15 so that the engaged state can be firmly maintained. It is also possible to make various other modifications. Depending on the configuration, e.g. For example, when the entire metal plate 11 thermally contracts at low temperatures, or when it thermally expands at high temperatures. However, each engagement hole 15 contacts only one side of the protrusion 5 and does not contact the other three sides. Since there is a gap between them, the protrusion 5 made of synthetic resin may crack or be damaged. There is no danger.

[0009] In the above embodiment, the protrusion 5 is provided on the synthetic resin pinion 1 side as the engagement portion. Although the engagement hole 15 is formed on the metal plate 11 side, the invention is not limited to this. However, other configurations such as an engagement hole on the pinion 1 side and a protrusion on the metal plate 11 side may be used. It can also be done. Also, instead of a protrusion, it does not penetrate the metal plate 11 or the pinion 1. It may also be used as an engagement recess, and furthermore, an engagement claw 35 and an engagement recess 25 as shown in FIG. 3 may be used. It is possible to employ various conventionally known configurations, such as the one shown in FIG. Also, in this example Although the shaft hole 2 of the synthetic resin pinion 1 is formed larger than the shaft hole 12 of the metal plate 11, It can also be formed into one size. Furthermore, a plurality of A metal plate 11 can also be attached.

0010 Figure 4 shows a synthetic resin pinion according to the present invention used for power reclining vehicle seats. An example is shown in which the reclining mechanism 40 is applied to a reclining mechanism. has a constantly engaged locking mechanism and is connected to the output shaft side of the small motor 41. The gear 3 on the outer periphery of the synthetic resin pinion 1 meshes with the pinion 42, and this synthetic resin pin The shaft 10 is inserted and fitted into the shaft hole 12 of the metal plate 11 attached to the union 1. The state is maintained. A sun gear 45 is formed on the tip side of this shaft 10, A plurality of stepped planetary gears 47 that mesh with the sun gear 45 are connected to the base 51 and the arm 5. Each gear of this stepped planetary gear 47 is arranged between the base 51 and the arm 52. The grooves are respectively engaged with internal teeth formed on the inner peripheral edges of grooves formed opposite to each other. Therefore, by rotating the pinion 42 connected to the output shaft side of the small motor 41, the When the resin pinion 1 is rotated and the shaft 10 is rotated, the sun gear 45, Each gear of the stepped planetary gear 47 rotates, and the tilting angle of the arm 52 with respect to the base 51 is adjusted. is adjusted.

[0011]

[Effect of the idea]

The above is the configuration of one embodiment of the reinforcing structure for the synthetic resin pinion according to the present invention. According to such a configuration, a reinforcing metal plate is attached to the side of the synthetic resin pinion, and the synthetic resin pinion is Reinforcement that forms multiple engaging parts on the side of the pinion and is attached to the side of the pinion. A plurality of engaging portions are formed on the side surface of the metal plate for use, and a plurality of engaging portions are formed on the side surface of the synthetic resin pinion. Since the engaging portion of the metal plate is engaged with the plurality of engaging portions on the side surface of the metal plate, the metal plate It has the same strength as a pinion with a There is no risk of damage to the resin pinion, and assembly work can be done easily and quickly. , it is possible to obtain a reinforced structure for the synthetic resin pinion that can improve work efficiency. can.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a front view.

FIG. 3 is a schematic cross-sectional view showing a modification of the engaging portion.

FIG. 4 is a sectional view showing an embodiment in which the present invention is applied to a reclining mechanism.

[Explanation of symbols]

1 Synthetic resin pinion 2 Shaft hole 5 Protrusion 11 Metal plate 12 Shaft hole 15 Engagement hole 25 Engagement recess 35 Engagement claw 40 Reclining mechanism

Claims (1)

[Scope of utility model registration request] 1. A synthetic resin pinion reinforcement structure in which a shaft hole for shaft insertion is formed in the center, a gear is formed on the outer periphery, and a reinforcing metal plate is attached to the side surface of the synthetic resin pinion. A plurality of engaging portions are formed on the side surface, a shaft hole for shaft insertion is formed in the center of the reinforcing metal plate, and the metal plate engages with the side surface engaging portion of the synthetic resin pinion. A reinforcing structure for a synthetic resin pinion characterized by forming a plurality of engaging parts.