JPH03140654A - Deterioration detector for transmission belt - Google Patents

Abstract

PURPOSE:To prevent a belt from being damaged by installing a conductive body in the inner part of a transmission belt energizeably with current, and detecting and displaying a fact that plural pieces of contacts are conducted with the body when this transmission belt is worn out and the conductive body is exposed. CONSTITUTION:When a V-belt 4 is worn out and a metallic fiber 6 is exposed, this metal fiber 6 comes into contact with flange parts 3A, 3B of an alternator pulley 3 and thereby an electric circuit is formed there through each route of brush 7 flange part 3B V-belt 4 and metallic fiber 6 flange part 3A center axis 3D brush 8 so that an interval between these brushes 7 and 8 comes to a state of being conducted. When wear in the V-belt 4 goes forward and an exposed range of the metallic fiber 6 is widened, another electric circuit is formed as well through the brush 7 the flange part 3B of alternator pulley 3 the metallic fiber of the V-belt 4 ... the flange part 1B of the crank pulley 1 brush 9, so that an interval between the brushes 7 and 9 comes to a state of being conducted. If so, a detector 11 impresses a pulse voltage to a gap between these brushes, energizing them with current and simultaneously it puts a pilot lamp 12. With this constitution, the necessity of replacement for a transmission belt can be recognized in advance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a deterioration detection device for detecting in advance that a conduction belt such as a V-belt or a timing belt will deteriorate due to wear or the like, leading to breakage. .

[Prior Art 1] Conventionally, for example, as shown in FIG. 7, a V-belt 54, which is passed between a crank pulley 51 of a vehicle, a pulley 52, and an alternator pulley 53, has a cross section as shown in FIG. It has a structure. That is, the V-belt 54 has a core wire disposed inside thereof as a reinforcing material in the circumferential direction, but when it gradually deteriorates due to wear over time and the core wire is cut, the alternator pulley 53 is rotated. In many cases, it becomes impossible to transmit the necessary force, and the necessary power generation and charging for the vehicle are no longer possible.

[2!1 Problems to be Solved by the Invention] In the conduction 1114N using the conventional V-belt 54,
Unless the V-belt 54 is checked for deterioration through periodic inspection, it is impossible to know in advance when deterioration will lead to breakage. Therefore, there was a problem in that power generation stopped during the drive, making the drive impossible, and it took a lot of time to repair the problem.

Therefore, it is a technical object of the present invention to solve the above-mentioned conventional problems by detecting deterioration of the V-belt, timing belt, etc. before it becomes damaged and displaying the deterioration.

[Means for Solving the Problems] The technical means for solving the above problems is to install a deterioration detection device for a conductive belt by disposing an electrically conductive object inside so that it can be energized, and by applying a rotational force from a drive pulley to a deterioration detection device for a conduction belt. a conductive belt that transmits the electrically conductive material to a driven pulley and rotates the driven pulley; A plurality of contacts are connected to each of the plurality of contacts for electrical conduction with an object, and when it is detected that at least two of the contacts are electrically connected to the object, an indication that the conduction belt has deteriorated is detected. According to another aspect of the present invention, the present invention is configured to include a detection means for outputting a display signal to cause the transmission belt to deteriorate, and a display means for inputting the display signal and displaying that the conduction belt has deteriorated.

[Function] According to the deterioration detection device for a conductive belt having the above configuration, the conductive belt that is stretched between the driving pulley and one or more driven pulleys is worn out due to long-term use, and the internal conductive belt is worn out due to long-term use. When a conductive object is exposed, conduction occurs between the conductive object and the driving pulley or the driven pulley, or between the conductive object and both the driving pulley and the driven pulley. At least two of the plurality of contacts installed in electrical contact with the driving pulley and the driven pulley are either the driving pulley, the driven pulley, or both the driving pulley and the driven pulley. When the conductive belt becomes electrically connected to the conductive object through the conductive belt, and the conductive object is able to be energized, the detection means outputs a display signal to the display means to indicate that the conductive belt has deteriorated. , display it on a display means.

[Example] Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a V-belt 4 that is passed around a crank pulley 1, a fan pulley 2, and an alternator pulley 3 of a vehicle, so that when the crank pulley 1 is rotated, the fan pulley 2 and alternator pulley 3 are rotated. This figure shows the conduction mechanism.

Further, FIG. 2 is a perspective view showing a longitudinal section of the V-belt 4. As shown in FIG.

As shown in FIG. 2, inside the V-belt 4, a large number of core wires 5 as reinforcing materials are arranged in the circumferential direction. Also,
A metal fiber 6 is disposed inside the V-belt 4 so as to be energized. Note that instead of the metal fibers 6, conductive synthetic resin, conductive synthetic rubber, or the like that can conduct electricity may be provided inside the V-belt 4.

FIG. 3 shows a cross section of three parts of the alternator pulley.

In FIG. 3, the flanges 3A, 3 of the alternator pulley 3
B is made of a metal body that can conduct electricity, and the central circumferential part 3C is made of an electrically insulating material to electrically insulate between the collar parts 3A and 3B.

On the other hand, the center circumference of the collar portion 3B is a circular gap. In the gap, there are a metal brush (contact) 7 that electrically contacts the inner diameter surface of the flange 3B and a metal brush (contact) 8 that contacts the outer peripheral surface of the central shaft 3D, as shown in the figure. Not attached to the brush bracket.

FIG. 4 shows a cross section of the crank pulley 1.

As shown in FIG. 4, the flanges 1A, 1 of the crank pulley 1
Similarly to the alternator pulley 3, B is made of a metal body that can conduct electricity, and the central circumferential portion 1C is made of an insulating material. The center circumferential portion of the flange portion 1B is a circular gap similar to the alternator pulley 3,
In the gap, a brush (contact) 9 having the same shape as the brush 7 is attached to a brush bracket (not shown).

As described above, the brushes 7 and 8 are arranged so as to be in contact with the alternator pulley 3, and the brush 9 is also arranged so as to be in contact with the crank pulley 1. These brushes 7.8 and 9 are connected to a detection circuit 11 as shown in FIG.

When the detection circuit 11 detects that the V-belt 4 is worn out and the metal TL fibers 6 are exposed and damaged, it outputs a display signal to indicate the deterioration of the V-belt 4. Further, a display lamp 12 attached to an instrument panel or the like is electrically connected to the detection circuit 11, and when a display signal is output from the detection circuit 11 to the display lamp 12, the display lamp 12 Deterioration of the V-belt 4 is displayed.

Next, the operation of the belt deterioration detection device constructed as above will be explained.

As shown in FIG. 3, the brush 7 contacts the inner diameter surface of the flange 3B, while the brush 8 is electrically connected to the flange 3A via the central axis 3D. Further, when the V-belt 4 wears and the metal fibers 6 are exposed, the metal fibers 6 come into contact with the flange 3A and the flange 3B of the alternator pulley 3. Therefore, an electric circuit is formed by the path of the brush 7 - the collar 3BV, the metal fiber N6 of the bell 1-4, the collar 3A, the center @ 3D, and the brush 8.

Therefore, the brush 7 and the brush 8 become electrically conductive.

Furthermore, if the V-belt 4 becomes more worn and the exposed range of the metal fibers 6 becomes wider, it is conceivable that the metal l116 will come into contact with both the alternator pulley 3 and the crank pulley 1 at the same time. In such a case, an electric circuit is formed along the path of the brush 7, the collar 3 of the alternator pulley 3, the metal fiber 6 of the BV belt 4, the collar 1B of the crank pulley 1, and the brush 9. Therefore, the brush 7 and the brush 9 are electrically connected.

As described above, when the brushes 7 and 8 or the brushes 7 and 9 become conductive, the detection circuit 11 applies a pulse voltage P as shown in FIG. 7 and the brush 9 to energize, and at the same time output a display signal Q as shown in FIG. 5 to the display lamp 12, causing the display lamp 12 to light up continuously.

Moreover, instead of continuously lighting the indicator lamp 12, the detection circuit 11 generates a lighting current for lighting the indicator lamp 12 when the brush 7 and the brush 8 IfA or the brush 7 and the brush 9 are in a conductive state. The indicator lamp 12 may be energized via the brushes 7 and 8 or the brushes 7 and 9. However, in the case of such a display circuit, when the V-belt 4 is initially worn, the metal fibers N of the V-belt 4
6 and the alternator pulley 3 or the contact with the flange of the crank pulley 1 is unstable, so the indicator lamp 12
The lamp will blink, and as wear progresses, it will turn on relatively continuously.

Next, in FIG. 6, the timing belt 2 is attached to the injection pulley 21, cam pulley 22, and crank pulley 23.
Multiplying 4 shows the conduction mechanism passed. Even in such a transmission mechanism, the timing belt 24 wears out due to long-term use, so the timing belt 24 deteriorates due to wear, and it is necessary to detect this before cutting it. Therefore, the deterioration of the timing belt 24 can be recognized in advance by displaying the deterioration of the timing belt 24 on the display lamp 12 with the same configuration as in the above embodiment. In addition,
In the embodiments and embodiments described above, depending on the exposed state of the metal fibers 6 of the V-belt 4, conduction may occur between the brushes 8 and 9, so deterioration of the V-belt 4 can be detected with higher accuracy. can do.

[Effects of the Invention] As described above, according to the present invention, ■ Deterioration of a transmission belt such as a belt or a timing belt can be detected and displayed before it becomes damaged, thereby eliminating the need for replacement of the transmission belt. This has the effect of avoiding conventional problems, such as when a vehicle stops due to a sudden power generation abnormality, and it takes a long time to recover. .

[Brief explanation of the drawing]

Fig. 1 is a system diagram showing the overall configuration of an embodiment of the present invention, Fig. 2 is a perspective sectional view of the belt, Fig. 3 is a longitudinal sectional view of the alternator pulley, and Fig. 4 is a crank pulley. Fig. 5 is a timing chart showing deterioration of the V-belt, Fig. 6 is a schematic diagram of an IO machine mechanism using a timing belt, and Fig. 7 is a diagram of a transmission mechanism road body using a conventional V-belt. FIG. 8 is a perspective sectional view of a conventional V-belt. 1... Crank pulley 1B... Flange part 3... Alternator pulley 3A, 3B... Flange part 4... V-belt 6... Metal! l Miscellaneous 7.8.9...Brush 11...Detection circuit 12...Indication lamp 24...Timing belt

Claims (1)

[Claims] A conductive object is arranged inside so as to be able to conduct electricity, and
a transmission belt that transmits rotational force from a driving pulley to a driven pulley to rotate the driven pulley; and the driving pulley that comes into contact with the conductive object when the transmission belt is worn and the object is exposed; a plurality of contacts for electrical connection with the object via a driven pulley, and the conduction belt is connected to each of the plurality of contacts, and when it is detected that at least two of the contacts are electrically connected to the object; A deterioration detection device for a conduction belt, comprising: a detection means for outputting a display signal for indicating that the conduction belt has deteriorated; and a display means for inputting the display signal and displaying that the conduction belt has deteriorated.