JPH0734228U - Large-diameter rotating body support structure - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a shaft support structure for a large-diameter rotating body, which is advantageous in terms of manufacturing economy and processing accuracy. [Structure] In a shaft support structure in which a cylindrical boss portion 3a formed in a central portion of a driving pulley 3 in a cableway is fitted and fixed to a rotary shaft 1 so as not to be rotatable relative to the rotary shaft 1, an annular shape is provided around a rotary shaft 1 and an outer peripheral portion. The sleeve 2 having the flange portion 2a protruding from the key engagement means 4,
5, the sleeve 2 is fitted and fixed so that it cannot rotate relative to the sleeve 2.
Then, the boss portion 3a of the pulley 3 is fitted and inserted with the axial end portion thereof abutting against the collar portion 2a, and both portions 2
The abutting portions of a and 3a are connected and fixed by fixing tools 6 and 7 so that they cannot rotate relative to each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a shaft support structure for a large diameter rotating body such as a driving pulley in a cableway. More specifically, the present invention relates to a shaft support structure for a large-diameter rotating body in which a cylindrical boss formed in the center of the large-diameter rotating body is fitted and fixed so as not to rotate relative to the rotating shaft. .

[0002]

[Prior art]

 Generally, when a rotating body such as a pulley or a gear is rotatably supported, a cylindrical boss formed at the center of the rotating body is fitted onto the rotating shaft by a key or spline engagement means so that they cannot rotate relative to each other. I am trying to fix it. That is, a key groove is formed on the inner peripheral surface of the boss portion, and this is engaged with a key provided on the rotary shaft. Alternatively, a spline groove is formed on the inner peripheral surface of the boss portion, and this is engaged with the spline shaft portion formed on the rotary shaft.

[0003]

[Problems to be solved by the device]

 However, when the diameter of the rotating body is large, such as a driving pulley in a cableway, it is extremely troublesome to machine a key groove or a spline groove on the inner peripheral surface of the boss portion, which is a problem in manufacturing economy.

That is, in the case of a driving pulley, a ministerial decree specifies that the rope diameter be 100 times or more, and the diameter is usually 4 to 5 m. In order to form a key groove on the inner peripheral surface of the boss to be placed, a large processing machine (key theta) having a pocket larger than the radius is required. In addition, generally, the processing machine to be used is different between the key groove processing and the inner diameter processing of the boss portion. For example, the inner diameter of the boss portion and the outer peripheral groove portion (line engaging groove portion) of the driving pulley is circular machining, and the turning machine is used, while the key groove processing is performed by a slotter machine in which the blade moves up and down. Therefore, a lot of manpower and time are required for setting for processing, and the processing cost becomes extremely high in combination with the expensive machine usage fee. This is the same when forming the spline groove.

In addition, in the case of a drive pulley having a large transmission torque, it is often necessary to provide a plurality of keys and key grooves in view of the transmission strength of the key. When multiple keyways are required in this way, it is necessary to align the scoring with the mating shaft when machining the keyway on the boss. The work is extremely troublesome and labor-intensive. This also applies to the spline groove, but especially in the case of the spline groove, it is practically impossible to perform mating with the mating shaft (spline shaft). Since there is no choice but to use only scoring, the processing accuracy is greatly affected by the scoring accuracy, and it is extremely difficult to make uniform contact with the mating axis, which is a problem with processing accuracy.

An object of the present invention is to solve the problems described above and to provide a large-diameter rotating body shaft support structure which is advantageous in terms of manufacturing economy and processing accuracy.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the large-diameter rotary body shaft support structure of the present invention is particularly provided with a sleeve having a ring-shaped flange portion projecting from the outer peripheral portion on the rotary shaft as a key or spline engagement means. The boss portion of the rotating body is fitted and inserted into this sleeve with its axial end portion abutting against the collar portion, and the abutting portion of both portions is abutted. It is proposed to fix and fix the so as not to rotate relative to each other by a fixing tool.

[0008]

[Action]

 Since the rotary shaft and the sleeve are connected to each other by key engagement means or spline engagement means, and the flange portion of the sleeve and the boss portion of the rotating body are connected to each other so as to be relatively non-rotatable, As in the case where the boss portion is directly fixed to the rotating shaft, the torque of the rotating shaft can be satisfactorily transmitted to the rotating body.

Moreover, since the key groove or the spline groove is formed on the small-diameter sleeve instead of the large-diameter rotating body, it is not necessary to use a large-sized processing machine, and the groove processing can be easily performed. Further, it is possible to easily perform a scoring operation when forming a plurality of key grooves and a rubbing operation with a mating shaft when forming a spline groove.

[0010]

【Example】

 Hereinafter, the configuration of the present invention will be specifically described with reference to the embodiments shown in FIGS. This embodiment relates to an example in which the present invention is applied to a shaft supporting structure of a driving pulley in a cableway.

In the shaft support structure shown in FIG. 1, 1 is a drive shaft that is a rotatably supported rotary shaft, 2 is a sleeve fitted and fixed to the drive shaft 1, and 3 is a drive shaft 1 via a sleeve 2. It is a driving pulley that is a large-diameter rotating body that is fitted and fixed.

As shown in FIGS. 1 and 2, the sleeve 2 is fitted to the upper end portion of the drive shaft 1 and is prevented from rotating relative to the drive shaft 1 by the key engaging means 4 ,. There is. That is, the inner peripheral surface of the sleeve 2 is formed with a plurality of key grooves 5 ... Which engage with the respective keys 4 provided on the upper end of the drive shaft 1, Due to the engagement action of the two, the first and second parties are connected so that they cannot rotate relative to each other. Further, as shown in FIG. 1, an annular collar portion 2a is formed on the outer peripheral portion of the upper end of the sleeve 2.

As shown in FIG. 1, the driving pulley 3 has a cylindrical boss portion 3a formed at the center thereof and an annular cord engaging groove 3b formed at the outer peripheral portion thereof. It is fitted into the sleeve 2 in a state of abutting against the lower surface of the collar portion 2a.

As shown in FIGS. 1 and 2, the sleeve 2 and the pulley 3 are relatively fixed to each other by connecting and fixing the flange portion 2a and the boss portion 3a with a plurality of fixing members 6, ... It is non-rotatably fitted and integrated. As the fixture, a combination of the shirring 6 and the reamer bolt 7 is used.

Therefore, in the shaft support structure configured as described above, between the drive shaft 1 and the sleeve 2 is the key engaging means 4, ..., 5 and the flange portion 2a of the sleeve 2. Since the pulleys 3 and the boss portion 3a of the pulley 3 are connected to each other in a non-rotatable manner by fixing members 6, ..., 7 respectively, the same as when the boss portion is directly fixed to the rotary shaft via the key engaging means. In addition, the torque of the drive shaft 1 can be satisfactorily transmitted to the pulley 2.

Moreover, since the plurality of keyways 5 ... Are formed in the small-diameter sleeve 2 instead of the large-diameter pulley 3, it is not necessary to use the large-sized keyway processing machine as described at the beginning, and the key is used. Grooving can be performed easily. In addition, the scoring operation during the machining is easy, and the key groove machining can be performed with high accuracy. Of course, with regard to the pulley 2, since the boss portion 3a is simply formed with a hole such as a tap hole, it is not necessary to change the machine or make a large-scale setting after the inner diameter processing of the boss portion 3a and the rope groove 3b. Therefore, the manufacturing cost can be significantly reduced as compared with the conventional structure.

The present invention is not limited to the above-described embodiments, but can be appropriately improved and modified within a range that does not deviate from the basic principle of the present invention.

For example, the number of key grooves 5 can be arbitrarily set according to the transmission torque. Further, as the relative rotation preventing means between the rotary shaft 1 and the sleeve 2, in addition to the above-mentioned key engaging means 4 and 5, spline engaging means can be adopted. That is, a part or the whole of the rotary shaft 1 is configured as a spline shaft, and a spline groove that engages with the spline shaft is formed on the inner peripheral surface of the sleeve 2. Even in such a case, it is possible to secure the above-mentioned manufacturing economic advantage, and moreover, as compared with the case where the spline groove is formed in the boss portion 3a of the large diameter rotating body 3, It is possible to easily perform the rubbing, to secure a uniform hit, and to greatly improve the accuracy. Further, the flange portion 2a of the sleeve 2 and the boss portion 3a of the rotating body 3 may have any shape, provided that the two portions 2a, 3a can be connected and fixed by a fixing tool in an abutting state. For example, the collar portion 2a may be formed at one end portion of the sleeve 2 as described above, or may be formed at an intermediate portion in the axial direction in relation to the boss portion 3a. Further, the fixture is also optional as long as it can transmit torque, and is not limited to the shirring 6 and the bolt 7 described above.

Further, the present invention is not limited to the pivotal support structure of the driving pulley 3 in the cableway, but can be suitably applied to any pivotal support structure of any large diameter rotating body such as a large diameter gear. When applied, the advantage becomes more remarkable as the diameter of the rotating body increases.

[0020]

[Effect of device]

 As can be easily understood from the above description, the shaft support structure of the large-diameter rotating body of the present invention can exhibit the same torque transmission function as the conventional structure, but the key groove or spline groove is small. It can be easily formed by using a processing machine, and it can easily perform scoring work when forming multiple key grooves and rubbing work with the mating shaft when forming spline grooves. Therefore, it is extremely advantageous in terms of manufacturing cost and processing accuracy.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of a shaft support structure for a large-diameter rotating body according to the present invention.

FIG. 2 is a cross-sectional bottom view taken along the line II-II of FIG.

[Explanation of symbols]

1 ... Drive shaft (rotating shaft), 2 ... Sleeve, 2a ... Collar part, 3
... prime mover (large diameter rotating body), 3a ... boss, 4 ... key (key engaging means), 5 ... key groove (key engaging means), 6 ...
Shirring (fixture), 7 ... Bolt (fixture).

Claims (1)

[Scope of utility model registration request] 1. A shaft support structure for a large-diameter rotating body, wherein a cylindrical boss portion formed in the central part of the large-diameter rotating body is fitted and fixed so as not to rotate relative to the rotating shaft. A sleeve having an annular flange portion projecting from the portion is fitted and fixed by a key or spline engagement means so that they cannot rotate relative to each other.
The boss portion of the rotating body is fitted and inserted with its axial end portion abutting against the flange portion, and the abutting portions of both portions are connected and fixed by a fixture so as not to rotate relative to each other. A large-diameter rotating body supporting structure.