JPH0712739Y2 - Axis support mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a device for attaching a shaft-supported body that can be operated either coaxially or eccentrically with a shaft-supported body such as a pulley or sprocket.

[Prior art]

FIG. 2 is a sectional view of a clamp bush as a conventional shaft-supported body for firmly supporting a rotating wheel. In the figure, 1 is a clamp bush consisting of an inner ring 1a, an outer ring 1b and a plurality of clamp screws 1c, 2 is a transmission rotary wheel, and 11 is a rotary shaft. 2a is an installation opening.

In this type of clamp bush, a tapered portion 1d is provided between the inner ring 1a and the outer ring 1b, and by tightening the two, the rotary wheel 2 is clamped on the rotary shaft 11 by utilizing frictional force without interposing a key. It is a thing. In this case, the clamp bush 1 has a clamping function (that is, a power transmission function) that pivotally supports the rotating wheel 2 on the rotating shaft 11, and a coaxial holding function that maintains the central axis of the rotating wheel 2 coaxially with the axis of the rotating shaft 11 ( That is, it also has a centering function).

〔problem〕

In the conventional clamp bush 1, the coaxial holding function is of course the power transmission function as a matter of course, and as a general rule, it is necessary to replace the belt except when the bearing is overhauled or when the pulley itself needs to be replaced or replaced. You don't even have to remove it. Therefore, when the clamp bushing 1 is completely mounted, there is rarely an opportunity to operate the clamp bush 1 itself, and since the power transmission function is required, the clamp bush 1 is firmly adhered to the rotating wheel 2 and the rotating shaft 11. Yes,
There is a drawback that disassembling or removing work is extremely difficult due to rusting due to long-term use, and it is not suitable for frequent attachment and detachment work.

Furthermore, when attaching or detaching the rotary wheel 2 as the shaft-supported body to the rotary shaft 11, the work is usually performed in a state in which a belt, a chain or the like is not wound around the rotary wheel 2. Done,
After connecting both, the shaft 11 and the rotary wheel 2 are generally moved as a whole to replace the tension band or apply and release tension. However, as disclosed in the invention of the applicant's application (see Japanese Patent Application No. 61-278957), the cord is wound around the rotating wheel 2 and is rotated without moving the rotary shaft 11 at all. When only the wheel 2 is moved to replace the tension band and apply / release the tension, in the conventional clamp bush 1 shown in FIG. 2, only the rotary wheel 2 is gradually moved in the direction perpendicular to the axis. Since it cannot be moved, it cannot perform work such as applying and releasing tension, and it has the drawback that the tension band can be replaced only by moving the shaft.

〔Purpose〕

When the coaxial holding bush interposed between the shaft and the supported body is attached and detached, the supported body that contacts the bush is slid in a direction perpendicular to the shaft to support the supported body. An object of the present invention is to provide a shaft-supported body mounting device for positioning the center and the shaft center coaxially or eccentrically.

[Technical means for solving problems]

In a device for attaching a supported body that is coaxial with the shaft when the cone is fitted into an inverted cone-shaped opening formed in the supported body, the cone has a large-diameter end portion. Side, the operation part of the thread winding upper body and the screw portion on the small diameter end side are respectively located on the support center line of the cone, and the coaxial holding bush integrally assembled with the screw winding upper body, and the screw. The shaft on which the hoisting body is screwed to the shaft end and a support base provided on the shaft are provided, and the shaft-supported body is slid in a direction perpendicular to the shaft center of the shaft and in the shaft center direction. And a guide device for blocking the movement of the cone, and the support center of the shaft-supported body is coaxially or eccentrically positioned with respect to the shaft core in response to the cone being screwed onto the shaft. It is a device for attaching a supported body that includes a supported body.

[Action]

The cone located between the shaft and the supported body is positioned so that the support center of the supported body is coaxial with the axis of the shaft as a result of the mounting operation by the screw winding body that is integrally attached to the body. Moreover, the support center of the shaft-supported body can be positioned at an arbitrary eccentric position from the axis of the shaft in accordance with the withdrawal operation by the screw winding body. Therefore, as a secondary effect, when the thread winding body is attached and detached while the tension band is wound around the shaft support, tension is applied to the tension band through the shaft support as it is attached. In addition, the tension is released with the extraction. Further, the tension band can be replaced by moving the shaft-supported body without moving the shaft at all.

〔Example〕

FIGS. 1 (A) and 1 (B) each show a state in which a coaxial holding bush is interposed between a supported body and a rotary shaft supporting the supported body mounting device of an embodiment of the present invention. FIG. 3 is a sectional view and a plan view of the entire transmission vehicle shown in FIG.

In this embodiment, a rotating wheel 15 used as a transmission wheel 10 for winding a timing belt is shown as an example of the shaft-supported body. In the figure, 10 is a transmission wheel, 11 is a rotating shaft, and a support base 13 is installed on the shaft 11 via a key 12 by a set screw (not shown) or the like. The support base 13 may be made of the same material as the rotary shaft 11 and integrally processed. This support base 13 is provided with a screw hole 13a at a position distant from the axis of rotation, and the upper portion is a flat surface portion 13b.
Is formed. Reference numeral 14 denotes a coaxial holding bush, and in this embodiment, a cone 14e having a conical taper portion 14a on the outer wall and a through hole 1 formed in the closing support portion 14d (see FIGS. 1 (c) and (d)).
4b, the inner wall is formed by a cylindrical shaft insertion hole 14c. On the other hand, the thread winding body 17 is penetrated through the through hole 14d, the nut 19 as the first locking portion is provided outside the through hole 14b, and the protruding locking for separating the cylindrical body is provided as the second locking portion inside the through hole 14b. The portion 18 is processed and the screw portion 17a is arranged in the axial direction. Nut 19
Since the operation part of the thread winding upper body 17 is formed by the second screw portion 17b and the screw winding upper body 17 is integrally assembled with the cone 14e, the coaxial holding bush 14 is operated by the operation of this operation portion. It is always attached and detached as a unit. In the present embodiment, 15 is a rotating wheel as a supported body supported by the rotating shaft 11, and is formed by three parts, namely, a belt groove portion 15a, a flat surface portion 15b, and a receiving portion 15c, and the groove portion 15a is for a toothed belt. The guide ring of 15g is
15b has a plurality of elongated holes 15e directed in the same direction to each other, and the bush receiving portion 15c has a reverse cone-shaped mounting opening portion 15f so that its supporting center is arranged coaxially with the rotating shaft 11 when mounted. The taper portion 15d having an inverted conical shape is processed therein. Further, a bolt 16 for fixing the shaft-supported body, that is, the rotating wheel 15 is attached to the elongated hole 15e between the elongated hole 15e and the screw hole 13a of the support base 13. In FIG. 1 (A), a coaxial holding bush
The state where the rotary wheel 15 is arranged coaxially with the rotary shaft 11 on the support base 13 by mounting 14 is shown. Further, FIG. 1 (B) shows a state in which four bolts are arranged. The bolt 16 and the elongated hole 15e form a guide device for the shaft-supported body 15, and the guide device has a clamp function for power transmission during operation, that is, a power transmission function between the shaft 11 and the rotating wheel 15. It is used, but during maintenance work such as belt replacement,
As will be described later, it has a function as a retaining bolt for the rotating wheel 15 and a guide function for determining the direction in which only the rotating wheel 15 slides without moving the shaft 11.

In this embodiment, the coaxial holding bush 14 functions as a coaxial holding function, that is, a centering function so that the rotation center axis of the rotating wheel 15 always coincides with the axis of the rotating shaft 11, but it is a clamp for fixing the rotating wheel 15. It does not work as a function. For the clamping function, the four bolts 16 are supported on the support base 13, and the support base 13 is pivotally supported on the rotary shaft 11 via the key 12, so that
The rotational force to 15 is transmitted via the support 13 and the bolt 16.

Further, the attachment / detachment of the coaxial holding bush 14 is extremely efficient at the time of maintenance work such as replacement of belts such as belts, or at the time of replacement of the rotary wheel 15 itself for changing the acceleration / deceleration ratio. Therefore, the work procedure will be described below.

That is, the bolt 16b is removed from the plurality of bolts 16, the bolt 16a acts as a retaining bolt, and the coaxial holding bush 14
It functions as a retaining function to prevent the rotary wheel 15 from being removed together when the is removed. Further, the bolt 16a is loosened to some extent, and the retaining bolt 16a is provided with a sliding guide, that is, a guide function and an axial retainer so that the rotary wheel 15 can be eccentrically slid in the longitudinal direction of the elongated hole 15e. It also fulfills the prevention function. Next, in this state, insert the bush 14 into the thread winding upper body.
When it is released by the operation of 17, the pressing force by the pre-timing belt is actually applied to the rotary wheel 15 accordingly, so that the rotary wheel 15 is reliably locked by the locking or locking action of the two locking bolts 16a. 15 is a cone of the coaxial holding bush 14.
Separation and removal from 14e is achieved. Along with this, the bush 14 begins to rise, and the rotating wheel 15 gradually moves on the supporting base 13 while a part of the tapered portion 14a thereof abuts on a part of the reverse tapered portion of the mounting opening 15f. It eccentrically slides in the direction of (not shown). Further, when the coaxial holding bush 14 is completely removed, a clearance of the thickness L of the bush 14 (see FIG. 1 (D)) is secured between the belt and the outer periphery of the rotating wheel 15a, and this interval is secured. This means that the rotating wheel 15 can slide. Therefore, it is possible to replace the rotary wheel 15 or the belt by utilizing this clearance. Fig. 1 (A)
The broken line indicates the state where the receiving portion 15c of the rotating wheel 15 has moved.

This means that in the past, when replacing the belt, the replacement work was carried out by moving the rotary shaft or the entire electric motor, whereas it is possible to accomplish the replacement work by simply moving only the rotary wheel without moving the rotary shaft. Means

When loading a new belt, slide the rotating wheel 15 so that the belt is inserted into the groove 15a of the rotating wheel 15 in the reverse order of the above, and then wind the coaxial holding bush 14 again by screwing. The rotary shaft 11 is loaded by the body 17. Depending on the tightening of the thread winding upper body 17, the head of the thread winding upper body, that is, the nut 19 serves as a first locking portion here, and a part of the tapered portion 14a of the coaxial holding bush 14 is opposite to the mounting opening 15f. Tapered part
As a result of sliding the rotating wheel 15 gradually against the tension of the belt while abutting on a part of 15d, the support center of the rotating wheel 15 that was finally positioned in the eccentric state, that is, The axis of rotation coincides with the axis of the rotary shaft 11, and the centering function is achieved. At the same time, appropriate tension is applied to the belt. Further, by tightening the four bolts 16a, 16b, the clamping function is fulfilled again, and the belt exchange is completed.

FIGS. 1C and 1D are an external perspective view and a sectional view of the coaxial holding bush 14 described above, respectively.
In this embodiment, the thread winding upper body 17 has a first screw portion 17a and a second screw portion 17b, and the second screw portion 17b has a first locking portion 19a.
That is, the nut 19 is applied, and the loctite or welded part 17
They are fixed so that they cannot rotate relative to each other at c. The second locking portion 18 is provided inside the closing support portion 14d of the cone 14e.
However, first locking portions 19 are arranged on the outside, respectively, and the thread winding upper body 17 is held as a whole in a state in which the through hole 14b maintains some play.

FIGS. 1 (E), (F) and (G) show the closing support portion 14d.
Top view of the cone 14e for showing the positional relationship between the cone 14e and the cone 14e, and the state of attachment of the slit, a sectional view taken along line FF, and G
The -G line sectional view is shown, respectively. An opening portion is arranged on one end side of the shaft insertion hole 14c of the annular cone 14e, that is, a small diameter side of the cone-shaped outer circumference, and a closing support portion 14d is arranged on the other end side, that is, a large diameter side of the cone-shaped outer circumference. Also, a large slit 14f that is large in the radial direction of the axial center from the closing support portion 14d toward the longitudinal cross section of the cone.
In addition to this, small slits 14g and through holes 14h are also radially provided in a plurality of places for bending in the longitudinal section of the cone only. These slits are provided for the purpose of further improving the assembling accuracy in the coaxial state, but they are not necessary when the accuracy is not required.

[Other Examples]

In the embodiment shown in FIG. 1, in the shaft-supported body 15 supported by the shaft 11,
Although the pulley rotating wheel for winding the timing belt is disclosed, the pulley is not limited to the pulley and may include sprockets, gears, and the like. The thickness L of the tip of the conical body may be arbitrarily changed depending on the type of the conical body and other usage conditions of the shaft-supported body, and the taper angle and the length of the conical body may be changed according to the magnitude of tension.

In addition to the above, various modifications can be made as the embodiment of the present invention. For example, the shaft connected to the coaxial holding bush 14 is not necessarily limited to the rotating shaft 11, and the support base 13 to the rotating shaft 11 can be freely changed. A free end similar to the end may be formed, and the rotating shaft of the present invention is a concept including such a shaft.

[Effect of device]

The ring-shaped cone is provided with a closing support part, and the coaxial holding bush is attached or removed by simply operating the screw winding body that is integrally provided in that part. Since the part moves while coming into contact with the inverted cone-shaped opening of the shaft-supported body, the shaft-supported body itself can be slid in the direction perpendicular to the shaft center, and the support center of the shaft-supported body and the shaft can be slid. It can be coaxial with the core or can be positioned eccentrically. Therefore, there is an advantage that the shaft-supported body can be replaced easily and quickly and the overhaul work of the bearings can be simplified and speeded up only by the operation of pulling out or mounting the coaxial holding bush.

This also means that when the shaft-supported body is a rotating wheel such as a pulley or sprocket, the conventional coaxial holding bush is not loaded or unloaded while the eccentric force due to the tension band is constantly applied to the rotating wheel. Although it is difficult itself, in the case of the present invention, it is only necessary to taper the outer periphery of the cone of the coaxial holding bush, and the center of the rotating wheel can be positioned while the taper and the tapered part of the shaft-supported body contact each other. Therefore, work such as changing the reduction ratio or exchanging the belt can be performed safely, reliably and promptly. That is, in the conventional pulley power transmission, when the belt is replaced, it is impossible to remove the belt from the groove and perform the replacement work without moving the entire shaft to which the pulley is attached. Since only the shaft-supported body, that is, only the pulley can be moved separately from the shaft while the shaft is fixed, the belt exchange including applying and releasing the tension can be remarkably simplified. At the same time, it has been considered impossible to assemble a belt transmission with an electric motor like a gear transmission, but according to the present invention, a shaft (that is, a rotary shaft)
Since the belt can be replaced by moving only the shaft-supported body (that is, the pulley) without moving the belt, it means that the entire transmitter can be stored in a single casing. However, similar to a gear transmission, a power transmission integrated with an electric motor can be realized, and industrially excellent derivative effects can be achieved.

[Brief description of drawings]

FIGS. 1 (A) and 1 (B) are a sectional view and a plan view of a pulley transmission vehicle to which an embodiment of a device for mounting a supported shaft of the present invention is applied, and FIGS. 1 (C) and (D) are respectively. FIGS. 1 (E), 1 (F) and 1 (G) are respectively an external view and a cross-sectional view of the shaft-supported body mounting device of the same embodiment, and FIGS. FIG. 2 is a top view showing a configuration of a cone, a sectional view taken along line FF and a sectional view taken along line GG, and FIG. 2 is a sectional view of a transmission vehicle using a conventional clamp bush. 10 ... Transmission wheel, 11 ... Shaft or rotary shaft, 13 ... Support base, 14 ... Coaxial holding bush, 15 ... Spindle support or rotary wheel, 17 ... Screw winding upper body

Claims (7)

[Scope of utility model registration request] 1. A shaft-supported body attachment device for holding the shaft-supported body coaxially with a shaft when the cone is fitted into an inverted cone-shaped opening formed in the shaft-supported body, wherein Is a coaxial holding in which the screw winding body is integrally assembled on the support center line of the cone so that the operating portion of the screw winding body is located on the large diameter end side and the screw portion is located on the small diameter end side. The bush, the shaft on which the screw winding body is screwed to the shaft end, and the support base provided on the shaft are provided to slide the shaft-supported body in a direction perpendicular to the axis of the shaft. And a guide device for preventing movement in the axial direction, and a position of a supporting center of the shaft-supported body with respect to the shaft center in accordance with the conical body being screwed onto the shaft. A device for attaching a supported body, which comprises: 2. The utility model registration claim, wherein the guide device is formed of an elongated hole formed in a flat surface portion of the shaft-supported body and a retaining bolt assembled to the support base through the elongated hole. The device for attaching a shaft-supported body according to item 1. 3. The shaft-supported body extends along the elongated hole between the periphery of the inverted cone-shaped opening and the shaft end of the shaft projecting into the opening when the coaxial holding bush is removed. The device for mounting a shaft-supported body according to claim 2, wherein the device is registered so as to be slidable. 4. The conical body of the coaxial holding bush has a thickness between an opening end into which the shaft is inserted and a small-diameter end portion of the conical taper portion so that a sliding region in which the shaft-supported body is movable. A device for mounting a shaft-supported body according to claim 3, characterized in that 5. The driven body is a pulley rotating wheel,
The sliding area of the pulley rotating wheel when the cone is removed is selected according to the thickness of the replaceable area of the tension band wound around the pulley rotating wheel. The device for attaching a shaft-supported body according to item 4. 6. The cone of the coaxial holding bush is such that a large slit extending from a closing support portion provided in a shaft insertion hole into which a shaft end of the shaft is inserted to a vertical cross section of the cone has a radial line of the shaft core. The device for mounting a shaft-supported body according to claim 4, which is applied in the direction of the utility model. 7. The utility model registration claim 6 in which the conical body of the coaxial holding bush has a small slit formed in a longitudinal section of the annular conical body in a radial direction of the shaft core. Attached device for shaft support.