JPH1113857A - Motion transmitting mechanical element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motion transmitting mechanical element whereby whether the motion transmitting mechanical element used in a machine is disused or reused can be visually easily and surely discriminated, in the case of tending to recycle the machine. SOLUTION: A motion transmitting mechanical element 1 has a plurality of tooth surfaces 5, in at least one tooth surface 5 of the tooth surfaces, so as to correspond to a wearing amount determining a life, a groove 15 of depth offset by a prescribed depth from this tooth surface 5 is provided at least by one quantity from a bottom 9 over to a tip 7. In this way, when presence of the groove 15 is confirmed by wearing of the tooth surface 5, the motion transmitting mechanical element 1 used in a machine for whether it is disused or able to reuse can be visually easily and surely discriminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a mechanical element for transmitting motion such as a gear, which is a component for transmitting motion by sliding contact.

[0002]

2. Description of the Related Art Gears, sprockets of chains, pulleys of toothed belts (timing belts), and the like are examples of motion transmitting parts that transmit motion by making sliding contact or friction. These mechanical elements are frequently used as motion transmitting parts in various machines such as copying machines and printers.

[0003] Incidentally, disposal of a machine that has retired from service due to replacement with a new product or aging of the machine itself has been regarded as a problem from the viewpoint of environmental protection and recycling of raw materials in recent years. Therefore, it is necessary to regenerate such a machine that has retired from service and use it again.

[0004]

[0005] However, the reproduction company,
When recycling a machine, it is necessary to determine which parts should be reused and which parts should be discarded for each individual part.
The discrimination work is difficult.

Accordingly, the present invention solves the above-mentioned problems, and it is possible to easily and reliably visually check whether a mechanical element for motion transmission used in a machine can be discarded or reused when trying to regenerate the machine. It is an object to provide a mechanical element for motion transmission that can be distinguished.

[0006]

According to a first aspect of the present invention, there are provided a plurality of tooth surfaces, at least one of which has a tooth surface corresponding to a wear amount for determining a life. At least one groove having a predetermined depth is provided on the tooth surface from the tooth bottom to the tooth tip.

According to the first aspect of the present invention, at least one groove is provided from the tooth bottom to the tooth tip so as to correspond to the amount of wear that determines the life. can do. By checking the presence or absence of grooves due to tooth surface wear, it is possible to discard or reuse the motion transmission mechanical elements used in the machine.
The determination can be made easily and reliably by visual inspection.

According to a second aspect of the present invention, in the first aspect of the present invention, a plurality of grooves on one tooth surface or a plurality of tooth surfaces are formed on one tooth surface or a plurality of tooth surfaces so as to correspond to a wear amount for determining a life. The present invention is characterized in that the depth of each groove is changed.

According to the second aspect of the present invention, the grooves are provided so as to correspond to the amount of wear which determines the life, and the depth of each groove corresponds to a different use time. You can determine how much is left. Accordingly, if the presence or absence of the groove due to the wear of the tooth surface is confirmed, it is possible to easily and reliably visually determine whether the motion transmitting mechanical element used in the machine can be discarded or reused.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a mark for specifying the presence or absence of the groove or the depth of the groove is provided on the side surface of the tooth provided with the groove. It is characterized by having been provided. The invention described in claim 4 is the invention according to any one of claims 1 to 3,
The mechanical element for transmitting motion is a gear.

According to the third and fourth aspects of the present invention, it is possible to identify at a glance where the groove is provided even if the groove is shallow and is difficult to see visually.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a gear (spur gear) 1 as an example of the motion transmitting mechanical element of the present invention. The gear 1 has a plurality of teeth 3. FIG. 2 typically shows two adjacent teeth 3 of the gear 1 on an enlarged scale. The life of the gear 1 as a mechanical element for transmitting motion is usually determined by the degree of wear of the tooth surface 5 of the tooth 3.

In the present invention, the tooth surface 5 includes a tooth end surface 11 and a root surface 13 extending from the tooth tip surface 7 to the tooth bottom surface 9. The life of the gear 1 when the wear of the tooth surface 5 becomes quantitatively longer than the initial state (designed state) depends on the type of the gear 1.

Therefore, as shown in FIG. 2, when the machine is to be regenerated, whether the gear 1 can be discarded or reused as a mechanical element for motion transmission can be easily and reliably visually determined. The gear 1 according to the embodiment of the present invention has the following configuration.

For the tooth surface 5 of one tooth 3 of the gear 1, 1
One groove 15 is formed in advance. That is, this groove 15
Are formed along the apical surface 11 and the root surface 13 from the tooth tip surface 7 to the tooth bottom surface 9, and the groove 15 is located at the center of the tooth surface 5. The depth d of the groove 15 is set to the wear amount m0 on the tooth surface 5 specified in advance by experiments or the like (d = m0).
An operator can visually and easily determine whether the gear 1 is discarded or reused as a motion transmitting mechanical element by the presence or absence of the groove 15. That is, the operator can determine that the gear 1 has reached the end of its life when the groove 15 becomes invisible.

Although the tooth surface 5 does not always wear uniformly from the tooth bottom surface 9 to the tooth tip surface 7 depending on how the gear 1 is used, the groove 15 is formed between the tooth bottom surface 9 and the tooth tip surface 7.
It is desirable to form it.

By the way, when the value of the depth d of the groove 15 is, for example, in the order of several μm, it is difficult to visually determine which tooth 3 the groove 15 is formed in, so as shown in FIG. On the side surface 17 of the tooth 3 having the groove 15, a mark 19 for specifying the presence or absence of the groove or the depth of the groove is provided. The mark 19 is, for example, a circular shape. However, the mark 19 may be a concave portion or a convex portion, or may be printed or pasted with a seal. Workers can use this landmark 1
By searching for a 9, a tooth 3 with a groove 15 can be found easily and quickly.

Next, another embodiment of the present invention will be described with reference to FIG. FIG. 3 shows a gear 101 according to another embodiment. Two adjacent teeth 103 of the gear 101 are shown in FIG.

In FIG. 4, the tooth surface 10 of one tooth 103
5, one groove 115 is formed in advance. That is, the groove 115 extends from the tooth tip surface 107 to the tooth bottom surface 109.
And the groove 115 is located at the center of the tooth surface 105.

FIG. 4 shows another tooth 103.
One groove 215 is formed in advance with respect to the tooth surface 205. That is, the groove 215 is formed along the apical surface 211 and the root surface 213 from the tooth tip surface 207 to the tooth bottom surface 209, and the groove 215 is formed on the tooth surface 205.
It is located in the center of.

The depth d1 of the groove 115 and the depth d2 of the groove 215 are set such that d1 <d2 <m0 with respect to the wear amount m0 on the tooth surface 105 specified in advance by experiments or the like.

Thus, when the user tries to regenerate the machine, the user checks whether the groove 115 of the gear 101 is gone, and then looks at the groove 215 to see how long the life of the gear 101 remains. Can be roughly determined.

The side faces 117, 2 of each tooth 103, 103
17 are provided with marks 119 and 219 for specifying the presence or absence of a groove or the depth of the groove, respectively. These landmarks 11
9, 219, and the depth d of the grooves 115, 215
1, d2. By providing the marks 119 and 219, the operator can easily and reliably find the difference between the location of the tooth provided with the groove and the depth of each groove at a glance.

As described above, the grooves having different depths are provided stepwise with respect to the plurality of teeth, and the operator checks the presence / absence of each groove and changes in the depth to determine the time until the life of the gear 101 is reached. Can be predicted.

Incidentally, the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the scope of the claims. The mechanical element for motion transmission according to the present invention is not limited to a gear, but may be a mechanical element having other types of teeth, such as a sprocket for hanging a chain or a pulley for hanging a toothed belt (timing belt). Also included.

The mechanical element for motion transmission according to the present invention is not limited to the spur gear shown, but may be a helical gear, a bevel gear, a rack, a straight bevel gear, a helical bevel gear, a spiral bevel gear, It also includes screw gears, hypoid gears, cylindrical worm gears, cylindrical worms, and the like.

Further, the color may be classified according to the depth of the groove, and the degree of wear may be determined based on the color of the worn position.

[0028]

According to the first aspect of the present invention, at least one groove is provided from the tooth bottom to the tooth tip so as to correspond to the amount of wear that determines the life. Can be determined. By checking the presence or absence of grooves due to tooth surface wear, it is possible to discard or reuse the motion transmission mechanical elements used in the machine.
The determination can be made easily and reliably by visual inspection.

According to the second aspect of the present invention, the grooves are provided so as to correspond to the amount of wear that determines the life, and the depth of each groove corresponds to a different use time. You can judge how much there is. Accordingly, if the presence or absence of the groove due to the wear of the tooth surface is confirmed, it is possible to easily and reliably visually determine whether the motion transmitting mechanical element used in the machine can be discarded or reused.

According to the third and fourth aspects of the present invention,
Even if the groove is shallow and hard to see visually, it is possible to identify at a glance where the groove is provided.

[Brief description of the drawings]

FIG. 1 is a view showing a gear as an embodiment of a motion transmitting mechanical element of the present invention.

FIG. 2 is a perspective view showing two teeth of the gear of FIG. 1;

FIG. 3 is a view showing a gear as another embodiment of the motion transmitting mechanical element of the present invention.

FIG. 4 is a perspective view showing two teeth of the gear of FIG. 3;

[Explanation of symbols]

 1,101 Gears (mechanical elements for motion transmission) 5,105,205 Tooth surface 7 Tooth tip 9 Root 15,15,215 Groove

Claims (4)

[Claims] A plurality of tooth flanks, at least one of which is provided with a groove having a predetermined depth from the root so as to correspond to an amount of wear that determines the life. A mechanical element for motion transmission, characterized in that at least one element is provided over the tooth tip. 2. A method according to claim 1, wherein a plurality of grooves on the tooth surface are provided on one tooth surface or on a plurality of tooth surfaces so as to correspond to the amount of wear that determines the life, and the depth of each groove is changed. The mechanical element for motion transmission according to claim 1. 3. The motion transmitting device according to claim 1, wherein a mark for specifying the presence or absence of the groove or the depth of the groove is provided on a side surface of the tooth provided with the groove. Mechanical element. 4. The motion transmitting machine element according to claim 1, wherein the motion transmitting machine element is a gear.