JPH0596612U - Pulley - Google Patents

Abstract

(57) [Abstract] [Purpose] To make the rotation of the pulley that hangs multiple belts smooth. [Structure] A plurality of grooves 3 and 4 for hanging belts 5 and 6 on a pulley 2 are formed on a peripheral surface. A pulley 2 made of resin or the like is fixed to the support shaft 1. The support shaft 1 is rotatably arranged on the chassis 10 and 11. The belt 5 is hooked on the driving portion and the belt 6 is hooked on the driven portion. A meat relief portion 8 is formed between the grooves 3 and 4 of the pulley 2. Therefore, it is possible to prevent the formation of cavities in the corresponding portions between the grooves 3 and 4, and to make the filling degree of the resin or the like between the grooves 3 and 4 uniform. Therefore, the pulley 2 can be smoothly rotated without the rotation blur of the pulley 2, so that the vibration of the chassis 10 and 11 to which the support shaft 1 of the pulley 2 is attached and the load on the support shaft 1 can be reduced, and the rotation system can be in a good state. Can be maintained.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pulley in which a plurality of grooves for hanging a belt are formed on the peripheral surface.

[0002]

[Prior Art]

 Conventionally, in order to transmit the rotational force of the driving portion to the driven portion, an intermediate pulley having a plurality of grooves for hanging a belt on the outer peripheral surface of the pulley may be interposed. FIG. 2 shows an example thereof.

In FIG. 1, reference numeral 1 denotes a support shaft, and both ends of the support shaft 1 are rotatably attached to a pair of chassis 10 and 11. Reference numeral 2 is a relay pulley, and the relay pulley 2 is arranged between a drive unit and a driven unit (not shown). The relay pulley 2 is integrally formed of resin or the like and is fixed to the support shaft 1.

Further, the relay pulley (pulley) 2 has grooves 3 and 4 for hanging the belts 5 and 6 on its outer peripheral surface formed at two positions with appropriate intervals. The belt 5 is hung on the drive unit and the pulley 2, and the belt 6 is hung on the pulley 2 and the driven unit. Then, as the drive unit rotates, the pulley 2 is rotationally driven to transmit the rotational force of the drive unit to the driven unit.

[0005]

[Problems to be solved by the device]

 In the structure as shown in FIG. 2, when the resin or the like is filled, a cavity (hole) 7 is formed in the vicinity of the corresponding portion between the grooves 3 and 4 (particularly where the belts 5 and 6 are hung). In addition, it was not possible to make the degree of resin filling in such a part uniform. Therefore, the pulley 2 causes a rotational shake to vibrate the chassis 10 and 11, and the spindle 1 is burdened, which adversely affects the rotating system.

Therefore, an object of the present invention is to smooth the rotation of a pulley that hangs a plurality of belts.

[0007]

[Means for Solving the Problems]

 In this invention, a pulley having a plurality of grooves for hanging the belt formed on the peripheral surface is integrally formed with resin, and a meat relief portion is formed between the grooves. is there.

[0008]

[Action]

 Since the meat relief portion 8 is formed between the grooves 3 and 4 of the pulley 2, it is possible to prevent a nest (hole) from being formed in a corresponding portion between the grooves 3 and 4, and It is possible to make the filling degree of the resin, etc. between them uniform. Accordingly, since the pulley 2 is free from rotational shake and the pulley 2 rotates smoothly, the load on the support shaft 1 to which the pulley 2 is attached can be reduced, and the rotating system can be maintained in a favorable state.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, parts corresponding to those in FIG. 2 are designated by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, reference numeral 8 denotes a meat relief portion, and the meat relief portion 8 is formed with an appropriate space between the meat relief portion 8 and the grooves 3 and 4. The meat escape portion 8 is formed from the outer peripheral surface of the pulley 2 to the vicinity of the support shaft 1. Also, the portion (flesh portion) 9 of the pulley 2 corresponding to the meat escape portion 8 does not cause a break or the like in the meat portion 9 even when the belts 5 and 6 are hung on the pulley 2 to rotate the pulley 2. Is set to. The rest of the configuration is similar to the example of FIG.

According to this example, since the meat relief portion 8 is formed between the grooves 3 and 4 of the pulley 2, it is possible to form a nest (hole) at a corresponding portion between the grooves 3 and 4. It can be prevented, and the filling degree of the resin or the like between the grooves 3 and 4 can be made uniform. Therefore, according to this example, since the pulley 2 is free from the rotational shake and the pulley 2 rotates smoothly, the vibration of the chassis 10, 11 to which the spindle 1 of the pulley 2 is attached and the load on the spindle 1 are reduced. The rotating system can be maintained in good condition.

In the above embodiment, the grooves 3 and 4 of the pulley 2 are formed at two places, but the number of grooves for hanging the belt is not limited to this. In this case, the degree of filling with resin or the like between the grooves can be made uniform by forming the meat relief portions between the grooves.

Further, in the above-described embodiment, the pulley 2 is an example arranged between the driving portion and the driven portion, but the pulley is not limited to this. For example, it can be similarly applied to a pulley of a driving unit or a pulley of a driven unit.

[0014]

[Effect of the device]

 According to this invention, since the meat relief portion is formed between the plurality of grooves for hanging the belt of the pulley, it is possible to prevent a nest from being formed in a corresponding portion between the grooves and to prevent the resin between the grooves from being formed. The filling degree of etc. can be made uniform. Therefore, according to the present invention, since the rotation blur of the pulley is eliminated and the pulley can rotate smoothly, the load on the support shaft to which the pulley is attached can be reduced and the rotating system can be maintained in a good state.

[Brief description of drawings]

FIG. 1 is a sectional view of an example.

FIG. 2 is a sectional view of a conventional example.

[Explanation of symbols]

 1 Spindle 2 Relay pulley 3,4 Groove 5,6 Belt 8 Meat relief part 10,11 Chassis

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) The inventor Hiromichi Nishirenchi 1-2-11 Ikenohata, Taito-ku, Tokyo Inside Aiwa Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A pulley in which a plurality of grooves for hanging a belt are formed on a peripheral surface, wherein the pulley is integrally molded with resin or the like, and a meat relief portion is formed between the grooves. And the pulley.