JPH03152401A - Shim for measuring clearance - Google Patents

Abstract

PURPOSE:To enable accurate measurement of an actual clearance between a rotating shaft ad a supporting body by a construction wherein projections to be deformed plastically when a compression force is applied thereto are provided on the lateral side of a disk-shaped base of a shim for measuring clearance. CONSTITUTION:A shim 1 is constructed of a disk-shaped base 2 and three projections 3a to 3c provided on one lateral side 2a of the base, and a through hole 2b is formed in the central part of the base 2. The projections 3a to 3c are positioned on lines forming central angles of 120 degrees to each other and also are formed on circumferences different in the central radium respectively. By interposing a shim 1 between a rotating shaft and a supporting body and by assembling the rotating shaft and the supporting body temporarily, accordingly, the projections 3a to 3c are compressed to the dimension of a clearance between the rotating shaft and the supporting body and deformed plastically. Subsequently the shim 1 is taken out by removing the temporary assembling of the rotating shaft and the supporting body, and the dimensions between the rear side of the base of the shim 1 and the top faces of the projections 3a to 3c are measured. Thereby an actual clearance between the rotating shaft and the supporting body can be known accurately.

Description

[Detailed description of the invention] [Industrial Application Field J The present invention relates to a clearance measuring shim.

[Prior Art] In a structure in which a rotating shaft is supported by a support, such as an engine or a power transmission device, in order to obtain smooth rotational movement of the rotating shaft with respect to the support, there is a gap between the support and the rotating shaft. ,
It is necessary to provide an appropriate gap along the axial direction of the rotating shaft, that is, an appropriate clearance.

Therefore, conventionally, the above-mentioned clearance has been adjusted by interposing a shim of an appropriate thickness between the support and the rotating shaft.

[Problems to be Solved by the Invention] By the way, in order to obtain a proper clearance, it is necessary to accurately grasp the gap between the support and the rotating shaft without a washer, and adjust the size of the gap. It is necessary to select and use a washer with the appropriate thickness.

However, for example, in a car transmission,
In a structure in which a bearing is provided on each of the one support body and the other support body that are assembled together, and both ends of the rotating shaft are supported by one support body and the other support body, respectively, both supports are provided. When the bodies are assembled together, the rotating shaft is completely covered by both supports, making it impossible for the operator to accurately grasp the internal situation, that is, the gap between the supports and the rotating shaft. , it was very difficult to obtain an appropriate clearance.

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, an object of the present invention is to provide a shim for measuring clearance that can accurately measure the actual gap (clearance) between a rotating shaft and a support body.

[Means for Solving the Problems] Therefore, in the clearance measuring shim according to the present invention, a protrusion that plastically deforms when compressive force is applied is provided on the side surface of the base, which has a disk shape.

[Function] According to the above configuration, by interposing the clearance measuring shim between the rotating shaft and the support and temporarily assembling the rotating shaft and the support, the protrusion can It is compressed and plastically deformed to the size of the gap between the shaft and the support. Therefore, by untying the temporary assembly of the rotating shaft and the support body, taking out the clearance n1 measuring shim, and measuring the dimension between the back surface of the base of the clearance measuring shim and the top surface of the protrusion, the above-mentioned result can be obtained. The actual gap between the rotating shaft and the support can be known accurately.

[Example] Hereinafter, a specific configuration of the present invention will be described in detail based on drawings showing one example.

In FIG. 1 and FIG. 2, the clearance n1 according to the present invention is shown.
Regular shim 1 is shown.

The shim 1 includes a disk-shaped base 2 and a base 2.
three protrusions 3a protruding from one side (surface) 2a of the
3b and 3c, and a through hole 2b is formed in the center of the base 2.

The protrusions 3a, 3b, and 3c are located on lines forming a central angle of 120 degrees with each other, and are formed on circumferences having different center radii.

Also, as clearly shown in FIG. 2, the protrusion 3a.

3b and 3c are formed thin so that they are easily crushed when compressive force is applied to the shim 1 in the axial direction (horizontal direction in the figure).

The shim 1 is made of a metal material that can be easily deformed by external force, such as iron, aluminum, copper, tin, or zinc, or a low yield point material such as plastic. When exposed to water, it undergoes plastic deformation without returning to its original shape.

Below, with reference to the apparatus shown in FIG. 3, the manner of use of the clearance measuring shim 1 will be explained.

The apparatus shown in FIG. 3 includes a rotating shaft 10, and one support 20 and the other support 30 that respectively support both ends of the rotating shaft 10 and are assembled to each other. Also,
The rotating shaft 10 has a gear 11 and a gear 12.

To measure the clearance between the support 20 and the rotating shaft 10, specifically, the axial gap between one of the supports 20 and the gear 12, first, the right end 10 of the rotating shaft 10 is measured.
A clearance measuring shim 1 (hereinafter referred to as shim 1) according to the present invention is fitted into R.

Next, both ends 1 of the rotating shaft 10 are attached to both supports 20 and 30.
Both supports 20 are attached while attaching 0R and IOL respectively.
．． 30 to each other and perform temporary assembly.

Here, when assembling one support 20 and the other support 30 to each other, as both supports 20 and 30 approach each other, the shim 1, specifically each protrusion 3a of the shim 1,
, 3b, 3c are the support boss end face 20a on one support body 20 and the side face 1 of the gear 12 on the rotating shaft 10.
2a and was crushed. Then, as shown in FIG. 3, when both the supports 20, 30 are completely assembled to each other, the protrusions 3a, 3 of the shim 1
b+3c is plastically deformed following the gear side surface 12a of the rotating shaft 10.

After the temporary assembly of both supports 20 and 30 is completed, the temporary assembly is released and the shim 1 is removed from the right end of the rotating shaft.

Next, by measuring the dimensions of three points from the other side (back surface) 2c of the base 2 of the shim 1 to the top surface of each protrusion 3a, 3b, and 3c with a caliper or the like, one support 20 The gap between the rotating shaft 10 and the rotary shaft 10 is determined by fi11.

After that, select a shim with an appropriate thickness based on the above measurement results, more specifically, the smallest total δP1 value among the measurement results at the three points mentioned above, and use this shim to assemble the above device. Accordingly, the support 20
An appropriate clearance can be set between the rotary shaft 10 and the rotating shaft 10.

In the above embodiment, three protrusions are provided on the base, but the number and installation position of the protrusions are not limited to those in the embodiment, and may vary depending on various factors such as the size of the object to be measured. Needless to say, it can be set as appropriate depending on the conditions.

Moreover, the above-mentioned protrusions are not limited to mutually independent small protrusions, and of course may be, for example, annular protrusions extending along the side surface of the base.

Furthermore, the clearance measurement shim according to the present invention can be used for shim adjustment work to suppress gear noise caused by axial play in transmissions, transfers, differentials, etc. of motorcycles and four-wheeled vehicles, and for tapered roller bearings. It is effective for shim adjustment work to prevent abnormal wear of the bearings in equipment that supports the rotating shaft, and is also effective for shim adjustment in the gear case of outboard motors. Needless to say.

That is, the clearance measuring shim according to the present invention can be effectively used for all operations that require shim adjustment.

[Effects of the Invention] As described above in detail, in the clearance measuring shim according to the present invention, a protrusion that plastically deforms when compressive force is applied is provided on the side surface of the disc-shaped base.

According to this configuration, by interposing the clearance measuring shim between the rotating shaft and the support and temporarily assembling the rotating shaft and the support, the protrusion can be moved between the rotating shaft and the support. It is compressed to the size of the gap between it and the body and undergoes plastic deformation. Therefore, by undoing the temporary assembly of the rotating shaft and support body,
The actual gap between the rotating shaft and the support body is determined by taking out the clearance measuring shim and measuring the dimension from the back surface of the base of the clearance Δ-1 measuring shim to the top surface of the protrusion in total by 1IP1. can be known accurately.

As a result, by using a shim with a thickness that corresponds to the gap between the rotating shaft and the support, an appropriate clearance can be easily obtained.

FIG. 1 is a front view of the clearance measuring shim according to the present invention, FIG. 2 is a cross-sectional view taken along the line ■-■ in FIG. 1, and FIG. 3 shows how the clearance measuring shim according to the present invention is used. FIG. 3 is a cross-sectional side view of the subject and measurement shim shown in FIG.

1... Shim for clearance measurement, 2... Base, 2
a...-blade side (surface), 2b...through hole, 2C...
...Other side surface (back surface), 3a, 3b, 3c --- protrusion.

Claims (1)

[Scope of Claims] A base having a disk shape; and a protrusion that protrudes from one side of the base and deforms plastically when compressive force is applied in a direction perpendicular to the base. A clearance measurement shim characterized by: