JPS6143001Y2 - - Google Patents

Description

[Detailed description of the invention] In the conventional method of operating auxiliary equipment (alternator, water pump, compressor, etc.) around the engine of a car by obtaining power from the crankshaft via a belt (V belt, ribbed belt, etc.), As shown in the figure, 2-stage pulley 2 with 2-stage clutch and 2-stage pulley 1 (crankshaft pulley)
When controlling the capacity of the auxiliary equipment 12 by changing its reduction ratio, the tensioning of the belts 5 and 6 on the high-speed and low-speed pulleys is determined by the respective tension adjustment devices 3 and 4 (tension pulleys). Assembly: Tension pulley + tension bracket). However, this method requires two sets of tension pulleys, which increases costs due to the large number of parts.Also, it requires two sets of tension pulleys to be installed in a narrow engine room, which improves workability and serviceability. There was also the problem of deterioration of

In FIG. 1, since the crankshaft pulley 1 has a small diameter pulley 1a and a large diameter pulley 1b integrated, the pulleys 1a and 1b rotate in the same direction. When trying to transmit rotation to the second stage pulley 2 on the auxiliary side using belts 5 and 6, the ratio of pulley diameter is diameter of pulley 1a/diameter of pulley 2a, diameter of pulley 1b/diameter of pulley 2b. Since the numbers are different, there is a difference in the rotational speed of the auxiliary pulley 2a and pulley 2b. Therefore, depending on the rotation speed of the crankshaft pulley 1 and other signals, the pulley 2 of the 2-stage pulley 2 on the auxiliary equipment side
The auxiliary machine 12 rotates only one of a and 2b.
A two-stage pulley with a structure to transmit power to the shaft was required. Its structure is that a clutch is provided at the auxiliary pulley 2a and at the joint between the pulley 2a and the shaft of the auxiliary 12, and the rotation of the pulley 2a is controlled according to the rotation speed of the two-stage pulley 1 on the crankshaft side and other signals. is transmitted to the shaft of the auxiliary machine 12 (low speed), and the rotation of the pulley 2b is transmitted to the shaft of the auxiliary machine 12 (high speed). The same effect can be obtained even if the pulley with a two-stage clutch is used as the pulley on the crankshaft side.

In addition, a belt tension adjustment device has been devised in which the tension pulley is a double pulley that can be moved in two directions by combining with two adjuster bars having elongated holes (for example, in actual use). (Refer to Publication No. 55-64547), the disadvantage was that it was difficult to adjust the belt tension because the tension pulley was a double pulley and the alignment bar was separate.

The present invention has been devised to eliminate the above-mentioned drawbacks of the conventional technology, improve workability and serviceability, and reduce costs by reducing the number of parts.

The present invention is a belt tension adjustment device using two belts, in which the belt tension adjustment device of one belt and the belt tension adjustment device of the other belt are connected through a single bracket having two elongated holes arranged approximately at right angles to each other. The belt tension adjustment device is characterized in that the belt tension adjustment devices of two belts are connected and integrated, and the belt tension adjustment devices of two belts are connected through one bracket having two elongated holes arranged substantially at right angles to each other. The present invention aims to provide an integrated belt tension adjustment device that can be applied to all power transmission devices using belts.

A second embodiment of the belt tension adjustment device of the present invention is shown below.
The structure and operation will be explained with reference to FIGS. 4 to 4. FIG. 2 is a perspective view of a tension bracket used in an embodiment of the belt tension adjustment device of the present invention;
Figure 3 is an explanatory diagram of the state in which the belt is tensioned using the tension bracket shown in Figure 2, where A is a front view, B is a side view, and Figure 4 is a sectional view of a belt tension adjustment device using a tension pulley. shows. The tension bracket 8 is a tension bracket with a brace 8a integrated therein, and has a vertical elongated hole 8b and a horizontal elongated hole 8 arranged at almost right angles to each other.
c is provided. The auxiliary equipment 12 is attached to the auxiliary equipment mounting bracket 11 with a bolt 10, a nut 17, and a washer 1.
8, move the elongated hole 8c on the brace 8a that is integrated with the tension bracket 8, and tighten the belt 5 that goes over the two-stage pulley 2 that is integrated with the auxiliary machine 12 and the crankshaft pulley 1. After tensioning, the bolt 9, nut 15, and washer 16 are used to fully tighten the brace 8a. Using bolts 10, nuts 17, and washers 18, fully tighten the auxiliary equipment 12 and the auxiliary equipment mounting bracket 11 to fix the auxiliary equipment 12. The other belt 6 is tensioned by moving the tension pulley 7 along the elongated hole 8b using the adjusting bolt 14. 13 is a washer.
The tension adjustment device (tension pulley) shown in FIG. 4 will be explained. Loosen the nut 23 and rotate the adjustment bolt 14 (counterclockwise for right-handed screws) to move the shaft 24 to A' (lowest position).
Place the belt 6 on the tension pulley 7, and rotate the adjustment bolt 14 (clockwise for right-handed screws) to tension the belt to the appropriate position. After that, tighten the nut 23 to fix the position of the tension pulley 7. 13 and 19 are washers,
20 is a collar, 21 is a sleeve, and 22 is a bearing (integrated with the tension pulley 7).
A indicates the uppermost position of the shaft. Note that the uppermost position A and the lowermost position A' of the shaft indicate the positions of the shaft 24 corresponding to the uppermost end and the lowermost end of the elongated hole 8b in the vertical direction, respectively. In this way, the belt tension of the belts 5 and 6 can be adjusted without affecting each other, so that the belt adjustment work as a whole becomes easy and the optimum value of the belt tension can be reliably obtained. In addition, workability and serviceability have been significantly improved when it comes to readjusting when one belt tension loosens during operation.

The present invention has the above configuration, and by using the bracket 8 integrated with the brace 8a and tensioning two belts as described above, the number of tension pulleys that conventionally required two sets is reduced to one set. As a result, the number of parts can be reduced, costs can be reduced, and work areas can be concentrated, which has the effect of improving workability and serviceability, as well as increasing reliability and safety. Further, although the two-stage pulley on the auxiliary machine side is a two-stage pulley, the same effect can be achieved even when it is used on the crankshaft side.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of power transmission from the crankshaft to the auxiliary equipment around the engine of a conventional automobile via a belt, and Fig. 2 is a perspective view of a tension bracket used in an embodiment of the belt tension adjustment device of the present invention. , Fig. 3 is an explanatory diagram of the state in which the belt is tensioned using the tension bracket shown in Fig. 2, A is a front view, B is a side view, and Fig. 4 is a cross section of a belt tension adjustment device using a tension pulley. Show the diagram. 1...Crankshaft pulley, 1a...Small diameter pulley, 1b...Large diameter pulley, 2...Auxiliary machine side two-stage pulley, 2a, 2b...Auxiliary machine side pulley, 3, 4...
...Tension adjustment device, 5, 6...Belt, 8...Tension bracket, 8a...Brace, 8b, 8
c...Elongated hole, 7...Tension pulley, 12...
Auxiliary equipment, 9, 10... Bolt, 11... Bracket, 15, 17... Nut, 16, 18, 13,
19...Washer, 14...Adjustment bolt, 20
... Collar, 21 ... Sleeve, 22 ... Bearing, 24 ... Shaft.

Claims (1)

[Scope of utility model registration request] In a belt tension adjustment device using two belts, the belt tension adjustment device of one belt and the belt tension adjustment device of the other belt are connected via one bracket having two elongated holes arranged approximately at right angles to each other. A belt tension adjustment device characterized by an integrated belt tension adjustment device.