JP3239624U - Belt tension adjustment jig - Google Patents

Abstract

An object of the present invention is to easily and accurately adjust the tension of a power transmission belt. A belt tension adjusting jig (1) has a V (V) contacting upper and lower peripheral surfaces of a drive system pulley with respect to a center line (A) connecting a center axis of a drive system pulley (Pd) and a center axis of a driven system pulley (Pds). A first pulley supporter 10 having a shape, a second V-shaped pulley supporter 20 abutting on the upper and lower peripheral surfaces of the driven pulley with respect to the center line, and a pulley support from the first pulley support to the center line. A bolt member 30 extending along the direction toward the second pulley stopper and formed with a thread groove on its periphery, and a nut member 41 whose one end engages the second pulley stopper and whose other end is screwed with the bolt member. A length adjusting member 40 is provided, which is formed in a hollow shape so that the bolt member can be inserted through the nut member, and is rotatable with respect to the bolt member and the second pulley support. [Selection drawing] Fig. 1

Description

The present invention relates to a belt tension adjusting jig for a power transmission belt provided on a drive system pulley and a driven system pulley.

A power transmission belt such as an endless belt (for example, a V-belt) is stretched to transmit power from a pulley of a driving system such as a motor to a pulley of a driven system (driven system). The power transmission belt is stretched between the driven system pulley and the drive system pulley under a predetermined tension (tensile force). Maintenance to replace the power transmission belt and adjust the tension is required.

To adjust the tension of the power transmission belt, confirm whether the drive system pulley is coaxial with the driven system pulley, in other words, whether the drive system pulley and the driven system pulley are positioned on a straight line. It is done while

JP-A-11-37236 Patent No. 6370267

For example, the tension of the power transmission belt can be adjusted while confirming the positions of both pulleys using a centering jig and an axial position measuring jig as described in Patent Documents 1 and 2. It could be done, but it was a lot of work.

FIG. 9 is a diagram for explaining a conventional tension adjustment operation of a power transmission belt. As shown in FIG. 9, a motor position adjustment mechanism (tension bolts C1, C2, elongated hole plates C3a to C3d) is provided on the installation base B on the motor M side, and the motor M is positioned relative to the driven system pulley Pds. By adjusting the position, the tension of the power transmission belt Va is adjusted. At this time, since nothing other than the power transmission belt Va exists between the drive system pulley Pd and the driven system pulley Pds, the power transmission belt Va is tensioned by adjusting the position of the motor M. The motor M (driving system pulley Pd) is tilted by being pulled by Va. As indicated by the dashed line in FIG. 9, the driving system pulley Pd is tilted, and misalignment occurs between the driving system pulley Pd and the driven system pulley Pds.

Therefore, the jigs described in Patent Documents 1 and 2 can be used to perform work while confirming the tilted state, but the jigs described in Patent Documents 1 and 2 originally prevent the tilt of the drive system pulley Pd. It's not a way to prevent it, it's just a way to check if it's tilted. For this reason, it is necessary to carefully proceed with the tension adjustment work little by little while checking the tilted state so that the drive system pulley Pd is not tilted, which is a very laborious and time-consuming task.

In particular, once the drive system pulley Pd is tilted, it is necessary to correct the tilt. As shown in FIG. 9, for example, while correcting the inclination while pushing the power transmission belt Va little by little in the opposite direction from the left and right with respect to the inclination direction, tension is applied to the power transmission belt Va to adjust the tension. It must be made. However, the space for installing the jack device J or the like for tilt correction cannot be secured, or the jack device J or the like must be mounted in a limited space or in an unstable place. In the latter case, there is a risk that the attached jack device J or the like will come off, and that the installation base B may be damaged by the external force of the jack device J or the like.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a belt tension adjusting jig that can suppress the inclination of a motor (driving system pulley) and easily and quickly adjust the tension of a power transmission belt.

(1) The present invention is a belt tension adjusting jig for a power transmission belt provided on a driving system pulley and a driven system pulley, and the driven system pulley and A V-shaped first pulley that abuts on the peripheral surface of the opposing drive system pulley and on the peripheral surfaces above and below the center line connecting the center axis of the drive system pulley and the center axis of the driven system pulley. a V-shaped second pulley abutment that abuts on the peripheral surface of the driven system pulley facing the drive system pulley in the region and on the upper and lower peripheral surfaces with respect to the center line; a bolt member having one end fixed to a first pulley contact, extending from the first pulley contact along the centerline toward the second pulley contact, and having a thread groove formed around its circumference; and a second pulley at one end. A nut member is provided on the other end that engages with the abutment and is screwed with the bolt member. and a rotatable length adjustment member. In the region where the power transmission belt is stretched, the first pulley contact device, the second pulley contact device, the bolt member, and the length adjusting member are arranged side by side on the center line.

(2) In (1) above, the first pulley contacting device and the second pulley contacting device may be block members having a V-shaped groove. The length adjusting member can be a cylindrical member, and can be constructed so as to be hollow in the entire longitudinal direction. At this time, the base end portion of the first pulley supporter facing the driven system pulley is provided with a fixing portion that is screwed with the bolt member, and the base end portion of the second pulley supporter facing the drive system pulley is provided with a length. An engagement protrusion may be provided which is inserted into the hollow of the length adjustment member and rotatably engages the length adjustment member. Each of the first pulley contact tool, the second pulley contact tool, the bolt member, and the length adjusting member is configured as a part that can be assembled.

(3) In (1) or (2) above, the length adjusting member may be a cylindrical member, and a non-slip portion may be provided on the outer peripheral surface.

(4) In the above (1) or (2), the contact surface of the first pulley contact that contacts the drive system pulley and the contact surface of the second pulley contact that contacts the driven system pulley are provided with pulley protection can be provided respectively.

According to the present invention, the belt tension adjusting jig is attached so as to be sandwiched between the driving system pulley and the driven system pulley in a state where the power transmission belt is stretched, and the length adjusting member is rotated to rotate the pulley. By adjusting the position in between, the tension applied to the power transmission belt can be adjusted.

Therefore, since the tension applied to the power transmission belt is adjusted while the positional relationship between the pulleys is physically maintained by the belt tension adjusting jig, the inclination of the drive system pulley can be suppressed, easily and easily. The tension of the power transmission belt can be adjusted in a short time.

It is a figure which shows an example of the belt tension|tensile_strength adjustment jig|tool of Example 1 which concerns on this invention, and is a figure which shows the state attached to the drive system pulley and the driven system pulley. It is a figure which shows an example which looked down on FIG. 1 from upper direction. 1 is an exploded view of a belt tension adjusting jig according to Embodiment 1 of the present invention; FIG. 1 is a cross-sectional view of a belt tension adjuster according to Embodiment 1 of the present invention; FIG. It is a figure for demonstrating the use condition of the belt tension adjusting tool of Example 1 which concerns on this invention. It is a figure for demonstrating the belt tension adjustment work to which the belt tension adjusting tool of Example 1 which concerns on this invention is applied. It is a figure for demonstrating the belt tension adjustment work to which the belt tension adjusting tool of Example 1 which concerns on this invention is applied. It is a figure which shows an example which applied the pulley protection sheet to the belt tension adjusting tool of Example 1 which concerns on this invention. FIG. 10 is a diagram for explaining a conventional operation of adjusting the tension of a power transmission belt;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

(Example 1)
1 to 8 are diagrams showing a first embodiment according to the present invention. FIG. 1 is a diagram showing an example of a belt tension adjusting jig 1 of this embodiment, and is a front view showing a state in which it is attached to a drive system pulley Pd and a driven system pulley Pds. FIG. 2 is a top view of FIG. 1 viewed from above, with part of the power transmission belt Va omitted.

As shown in FIGS. 1 and 2, a power transmission belt Va is stretched between a drive system pulley Pd and a driven system pulley Pds of a drive system such as a motor M. power is transmitted to the driven system pulley Pds.

In the belt tension adjusting jig 1 of this embodiment, the central axis a1 of the driving system pulley Pd and the central axis a2 of the driven system pulley Pds are aligned in the region S sandwiched between the driving system pulley Pd and the driven system pulley Pds. It is arranged along the connecting center line A and serves as a tension rod between the drive system pulley Pd and the driven system pulley Pds, while adjusting the position between the drive system pulley Pd and the driven system pulley Pds. do. The central axis a1 and the central axis a2 are parallel to each other, and the central line A intersects both the central axis a1 and the central axis a2 perpendicularly.

3 is an exploded view of the belt tension adjusting jig 1, and FIG. 4 is a sectional view of the belt tension adjusting jig 1. As shown in FIG.

The belt tension adjusting jig 1 includes a first pulley contact tool 10 , a second pulley contact tool 20 , a bolt member 30 and a length adjusting member 40 . The first pulley contact tool 10 and the second pulley contact tool 20 are connected via the bolt member 30 and the length adjusting member 40 .

The first pulley support 10 is a V-shaped block that abuts on the peripheral surface of the driving system pulley Pd facing the driven system pulley Pds in the region S and on the peripheral surfaces above and below the center line A. A V-shaped groove portion 11 is formed in which contact surfaces 10a and 10b that contact the peripheral surface of the drive system pulley Pd are provided. A fixing portion 13 that is screwed with the bolt member 30 is provided on the driven system pulley Pds, that is, the base end portion 12 facing the second pulley support 20 side. A nut member, for example, can be applied to the fixing portion 13 .

The contact surfaces 10a and 10b are inclined surfaces formed vertically symmetrically about the center line A, and the contact surfaces 10a and 10b are in contact with the arc-shaped peripheral surface of the driving system pulley Pd. In this state, the contact point of the contact surface 10b is positioned on the extension of the perpendicular drawn from the contact point of the contact surface 10a to the center line A. That is, the contact surfaces 10a and 10b are in contact with the peripheral surface of the drive system pulley Pd at positions equidistant from the center line A. As shown in FIG. The size of the V-shaped groove 11 of the first pulley support 10 and the angle of inclination of the contact surfaces 10a and 10b are arbitrarily set in consideration of the size of the pulley and the versatility of the belt tension adjusting jig 1. be able to. The same applies to the second pulley support 20 as well.

The second pulley support 20 is a V-shaped block that abuts on the peripheral surface of the driven system pulley Pds that faces the drive system pulley Pd in the region S, and also abuts on the upper and lower peripheral surfaces with respect to the center line A. A V-shaped groove portion 21 is formed in which contact surfaces 20a and 20b that contact the peripheral surface of the driven system pulley Pds are provided. Further, an engagement projection 23 that engages with the length adjustment member 40 is provided on the drive system pulley Pd, that is, the base end 22 facing the first pulley support 10 side. Although the first pulley contacting device 10 and the second pulley contacting device 20 are block members, they have hollowed out structures for weight reduction (see FIG. 4).

A screw groove is formed around the bolt member 30 , and one end of the bolt member 30 is screwed into and fixed to the fixing portion 13 of the first pulley stopper 10 . The bolt member 30 is an elongated member extending from the first pulley contact member 10 along the centerline A toward the second pulley contact member 20 .

One end of the length adjusting member 40 engages with the engaging projection 23 of the second pulley support 20 , and the other end is provided with a nut member 41 that screws together with the bolt member 30 . The length adjusting member 40 is a cylindrical elongated member which is formed in a hollow shape (a hollow portion 42) through which the bolt member 30 can be inserted through the nut member 41, and which is hollow in the entire longitudinal direction. The engaging projection 23 of the second pulley support 20 has a size that allows it to be inserted into the hollow portion 42 and engages the length adjusting member 40 so that it can rotate. The length adjusting member 40 can rotate due to its hollow shape that engages with the nut member 41 that is screwed with the bolt member 30 and the engaging protrusion 23 of the second pulley support 20. 30 advances and retreats with respect to the length adjusting member 40 .

The method of rotating the length adjusting member 40 is as follows: First, the nut member 41 can be rotated by pinching it with a tightening tool such as a wrench. Second, the length adjusting member 40 is gripped and manually rotated. be able to. In the latter, a non-slip portion 43 can be provided on the outer peripheral surface of the tubular length adjusting member 40 . The non-slip portion 43 can be formed directly on the outer peripheral surface of the length adjusting member 40 by knurling, or can be configured by winding a non-slip sheet made of resin or the like around the length adjusting member 40. - 特許庁Note that the anti-slip portion 43 can be formed on the length adjusting member 40 entirely or partially in the longitudinal direction. In this embodiment, an aspect in which the anti-slip portion 43 is provided in a partial area of the length adjusting member 40 in the longitudinal direction is illustrated.

In the belt tension adjusting jig 1, the first pulley contacting device 10, the second pulley contacting device 20, the bolt member 30, and the length adjusting member 40 are configured as parts that can be assembled. In the stretched region S, the first pulley stopper 10, the second pulley stopper 20, the bolt member 30, and the length adjusting member 40 are arranged side by side on the center line A (Fig. 1 , see Figure 2).

FIG. 5 is a diagram for explaining how the belt tension adjuster 1 is used. As described above, the bolt member 30 advances and retreats with respect to the length adjusting member 40 by rotating the length adjusting member 40 . In the example of FIG. 5, when the nut member 41 is rotated in the tightening direction from the state illustrated in the center, the bolt member 30 enters the length adjusting member 40 (inside the hollow portion 42), and the entire belt tension adjusting jig 1 is tightened. shorter in length. On the other hand, when the nut member 41 is rotated in the loosening direction from the state shown in the center, the bolt member 30 comes out of the length adjusting member 40 and the length of the entire belt tension adjusting jig 1 is lengthened.

6 and 7 are diagrams for explaining the belt tension adjustment work using the belt tension adjuster 1. FIG.

First, as in the example of FIG. 9 described above, the motor M to which the drive system pulley Pd is attached is provided with a motor position adjustment mechanism (tension bolts C1, C2, elongated hole plates C3a to C3d). It is installed on the installation base B via plates C3a to C3d. The installation base B is provided with tension bolts C1 and C2 that press the frame of the motor M. By operating the tension bolts C1 and C2, the position of the motor M with respect to the driven system pulley Pds, that is, The position of the drive system pulley Pd can be adjusted. The tension bolts C1 and C2 are spaced apart in the direction of the central axis a1 of the drive system pulley Pd. It is provided at the end of the body of the motor M on the side opposite to Pd, and can adjust the position of the drive system pulley Pd with respect to the driven system pulley Pds and the centering adjustment of the drive system pulley Pd.

Before the belt tension adjustment jig 1 is installed, the worker performs centering work between the drive system pulley Pd and the driven system pulley Pds. For example, the tension bolts C1 and C2 are operated while checking using the measuring tools described in Patent Documents 1 and 2, and the driving system pulley Pd and the driven system pulley Pds are perpendicular to the central axes a1 and a2, respectively. Perform centering adjustment so that it is positioned on a straight line (center line A).

Next, the operator places the belt tension adjusting jig 1 in the area S, brings the first pulley contact 10 into contact with the peripheral surface of the driving system pulley Pd, and moves the second pulley contact 20 to the driven system. The belt tension adjusting jig 1 is installed between the driving system pulley Pd and the driven system pulley Pds by rotating the length adjusting member 40 in contact with the peripheral surface of the pulley Pds. At this time, the length adjusting member 40 is manually rotated by gripping the non-slip portion 43, thereby improving working efficiency. The installed belt tension adjusting jig 1 includes a first pulley contact device 10, a second pulley contact device 20, a bolt member 30, and a length adjusting member in a region S where the power transmission belt Va is stretched. 40 are aligned on the center line A.

Then, the length adjusting member 40 is manually rotated or the nut member 41 is rotated using a tightening tool to adjust the position of the driving system pulley Pd away from the driven system pulley Pds, and tension is applied to the power transmission belt Va. . At this time, the tension bolts C1 and C2 can be operated to adjust the position of the motor M with respect to the driven system pulley Pds. For example, while rotating the length adjusting member 40, the tension of the power transmission belt Va is checked, and if it is necessary to apply more tension, the tension bolts C1 and C2 are operated to position the motor M with respect to the driven system pulley Pds. are separated from each other, and the length adjusting member 40 is rotated to apply tension to the power transmission belt Va.

The operator checks with a tension meter or the like whether the tension applied to the power transmission belt Va after rotating the length adjusting member 40 is a predetermined tension. After confirming that the power transmission belt Va is stretched with a predetermined tension, the drive system pulley Pd and the driven system pulley Pds are each aligned with a straight line perpendicular to the central axes a1 and a2 using a measuring tool or the like. It is confirmed whether it is positioned upward, and if necessary, the tension bolts C1 and C2 are operated to perform the centering adjustment described above.

FIG. 8 is a diagram showing an example of applying the pulley protection sheet 50 to the belt tension adjuster 1. As shown in FIG.

The pulley protection sheet 50 is a sheet member made of resin such as rubber, and includes the contact surfaces 10a and 10b of the first pulley contact member 10 contacting the drive system pulley Pd and the second pulley contact contacting the driven system pulley Pds. The contact surfaces 20a and 20b of the tool 20 are provided to protect the drive system pulley Pd and the driven system pulley Pds.

As described above, the belt tension adjusting jig 1 of the present embodiment is attached so as to be sandwiched between the driving system pulley Pd and the driven system pulley Pds in a state where the power transmission belt Va is stretched, thereby adjusting the length. By rotating the member 40, the position between the pulleys can be adjusted, and the tension applied to the power transmission belt Va can be adjusted.

Therefore, the tension applied to the power transmission belt Va is adjusted by the belt tension adjusting jig 1 while the positional relationship between the pulleys is physically maintained. Adjustment of the tension of the power transmission belt Va when replacing the power transmission belt Va and adjustment of the tension of the existing power transmission belt Va can be performed easily and in a short time.

The belt tension adjusting jig 1 of this embodiment is composed of the first pulley contacting device 10, the second pulley contacting device 20, the bolt member 30, and the length adjusting member 40, which can be assembled. For example, when performing belt tension adjustment work, a worker may install the belt tension adjustment jig 1 by assembling parts on site.

In addition, since the first pulley contact tool 10, the second pulley contact tool 20, the bolt member 30, and the length adjustment member 40 are parts that can be assembled, for example, the bolt member 30 and the length adjustment member 40 are A plurality of members having different lengths can be prepared in advance and selected arbitrarily according to the distance between pulleys for belt tension adjustment to assemble and use the belt tension adjusting jig 1 .

In the above description, a mode in which one power transmission belt is stretched has been described as an example. Tool 1 is applicable.

1 belt tension adjusting jig 10 first pulley contact tools 10a, 10b contact surface 11 groove 12 base end 13 fixed part 20 second pulley contact tool 20a, 20b contact surface 21 groove 22 base end 23 engagement protrusion 30 bolt member 40 length adjusting member 41 nut member 42 hollow portion 43 non-slip portion 50 pulley protection sheet Pd driving system pulley Pds driven system pulleys a1, a2 center axis A center line M motor B installation bases C1, C2, C3a~ C3d motor position adjustment mechanism

Claims (4)

A belt tension adjusting jig for a power transmission belt provided on a driving system pulley and a driven system pulley,
A center connecting the center axis of the drive system pulley and the center axis of the driven system pulley while contacting the peripheral surface of the drive system pulley facing the driven system pulley in the area sandwiched between the drive system pulley and the driven system pulley a V-shaped first pulley contact tool that abuts on the upper and lower peripheral surfaces of the line;
a V-shaped second pulley support that abuts on the peripheral surface of the driven system pulley facing the driving system pulley in the region and abuts on the peripheral surfaces above and below the center line;
a bolt member having one end fixed to the first pulley stopper, extending from the first pulley stopper along the centerline toward the second pulley stopper, and having a thread groove formed on its periphery;
A nut member having one end engaged with the second pulley stopper and the other end screwed with the bolt member is provided, and the bolt member is formed in a hollow shape so that the bolt member can be inserted through the nut member. a length adjusting member rotatable with respect to the bolt member and the second pulley fitting,
The first pulley stopper, the second pulley stopper, the bolt member, and the length adjusting member are arranged side by side on the center line in the region where the power transmission belt is stretched. A belt tension adjusting jig characterized by: The first pulley contact tool and the second pulley contact tool are block members having a V-shaped groove,
The length adjusting member is a cylindrical member, and is formed hollow in the entire longitudinal direction,
A fixing portion that is screwed with the bolt member is provided at a base end portion of the first pulley stopper facing the driven pulley,
An engagement projection is provided at the base end of the second pulley support facing the drive system pulley, which is inserted into the hollow of the length adjustment member and rotatably engaged with the length adjustment member,
2. The belt tension adjusting jig according to claim 1, wherein said first pulley contacting device, said second pulley contacting device, said bolt member, and said length adjusting member are configured as parts that can be assembled. equipment. 3. The belt tension adjusting jig according to claim 1, wherein the length adjusting member is a cylindrical member, and is provided with a non-slip portion on an outer peripheral surface thereof. A resin sheet for protecting the pulleys is provided on the contact surface of the first pulley contact member that contacts the drive system pulley and the contact surface of the second pulley contact device that contacts the driven system pulley. 3. The belt tension adjusting jig according to claim 1 or 2.

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