JPS5825159Y2 - double toothed belt - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a double toothed belt that rotates a plurality of adjacent driven wheels one rotation in opposite directions using one belt. This belt relates to a double toothed belt characterized in that the tooth surfaces of the belts lb are engaged with each other to form one belt, and when driving the driven wheel 2, the belt is separated and driven by the tooth surfaces.

In fields such as precision machinery, office equipment, and household appliances, there are many devices that rotate adjacent driven wheels in opposite directions.

When trying to transmit power using a single belt, conventionally, a double belt 3 as shown in Fig. 1 was bent with a small radius of curvature in the forward and reverse directions as shown in Fig. 1. It needs to be arranged in a certain form.

Note that 4 is one driving wheel, and 5 is an idler wheel.

Therefore, since the double belt 3 is repeatedly bent in forward and reverse directions, it is damaged quickly and has a short lifespan, and this tendency increases when there are many driven wheels 2 that try to rotate in opposite directions. There were drawbacks.

Furthermore, since the toothed belts that have recently been widely used in this field have a structure in which only one side can be used for transmission, it is difficult to use them for this purpose.

The present invention was developed in view of the above points, and its purpose is to be able to reliably transmit power from the driving wheels to the driven wheels, with little power loss, and to ensure accurate rotational speed of the driven wheels. The objective is to provide a double toothed belt that has high strength, long life, simple structure, and is economical.

The present invention will be explained below with reference to the illustrated embodiments.

FIG. 3 is an explanatory view of power transmission when a double toothed belt according to an embodiment of the present invention is used, and FIG. 4 is a partially enlarged view of FIG. 3.

In Fig. 3, 4 is a driving wheel, 5 is an idler wheel, 6 is an idler wheel,
2a and 2b are driven wheels.

Therefore, a toothed belt 1a is attached to the outer periphery of the driven wheels 2a and 2b.
, 1b are formed with t-tooths to engage with the unevenness of the tooth surfaces.

7 is a double toothed belt, comprising l pairs of toothed belts 1a.
, 1b are formed into one belt by interlocking the tooth surfaces of the belts.

The double toothed belt 7 is suspended between the driving wheel 4 and the idler wheel 5, and further separates into the respective toothed belts Ha and 1b at the idler wheel 6 disposed in front of the driven wheels 2a and 2b. One of the toothed belts Ha is suspended so as to mesh with the teeth on the upper surface of the outer periphery of the driven wheel 2a, and the other toothed belt 1b is suspended so as to mesh with the teeth on the lower surface of the outer periphery of the driven wheel 2b.

As shown in FIG. 3, the double toothed belt 7 is separated into toothed belts tla and 1b at the idler ring 6, and the teeth of each tooth are connected to the teeth on the outer periphery of the driven wheels 2a and 2b in different rotation directions. Since the toothed belt 1a is designed to mesh with each other, the number of forward and reverse curvatures is reduced and the radius of curvature is large.
Even if 1b is suspended, toothed belts Ia, Ib and driven wheel 2a
, 2b to prevent them from slipping.
This driving force is transmitted to rotate the plurality of driven wheels 2a, 2b in mutually opposite directions.

In addition, even in the case of reverse curvature, the idler ring 6 of the toothed belt tla, lb
Since the toothed belts tla and 1b are in contact with each other on a surface which is not provided with teeth, damage to the toothed belts tla and 1b is extremely small.

When the drive wheel 4 is rotationally driven in the direction of the arrow a by a drive means (not shown), the double toothed belt 7 rotates around the driven wheels 2a,
Each toothed bell lea at the front idler ring 6 of 2b,
1b, one toothed belt 1a connects the driven wheel 2a to a
The other toothed bell Nb is rotated in the direction of the arrow t.
b is rotated in the direction of the arrow b, and then at the idler wheel 5, the tooth surfaces of the l pair of toothed belts 1a and 1b are engaged,
It moves again in the direction of the first drive wheel 4 (direction C in FIG. 2).

By repeating the above operations, the rotational power of the drive wheel 4 is reliably transmitted to the plurality of driven wheels 2a, 2b, and the driven wheels 2a, 2b rotate in opposite directions.

As shown in FIGS. 3 and 4, the double toothed belt 7 has two toothed belts 1a and 1b between the idler wheel 5 and the drive wheel 4, and between the drive wheel 4 and the idler wheel 6. Since the teeth move with their tooth surfaces meshing with each other, there is no damage to the teeth due to movement in this section.

Moreover, the toothed bell lla comes into contact with wheels such as the driving wheel 4, the idler wheel 5, and the idler wheel 6.

Since the toothed belts 1a and 1b are on the back side, there is little damage to the toothed belts 1a and 1b, and the manufacturing cost of the wheels can be reduced.

Note that the tooth profile and material of the toothed belts tla and lb are not limited, and combinations of known toothed belts may be used.

The present invention (as mentioned above, in this double toothed belt, since the tooth surfaces of l pairs of toothed belts are intermeshed with each other to form one belt, the number of forward and reverse bends is reduced,
Moreover, even if the toothed belt is suspended on the driven wheels with a large radius of curvature, multiple driven wheels can be rotated once in opposite directions to prevent the toothed belt and the driven wheels from slipping. By suspending the toothed belt while reducing the number of reverse curvatures and increasing the radius of curvature, damage to the toothed belt can be reduced and the life of the toothed belt can be extended.

Furthermore, since the l pair of toothed belts that are made into one belt are separated and driven by the tooth surfaces when driving the driven wheel, the tooth surfaces of the toothed belt and Since contact with the wheels can be reduced, damage to the toothed belt can be reduced, and contact between the tooth surface of the toothed belt and the wheels can be reduced, so the number of toothed wheels can be reduced. It has the advantage that the manufacturing cost of the wheel is low and economical.

Further, since the drive is performed by the toothed surface of the toothed belt, there is an advantage that the transmission force is large and accurate rotation speed of the driven wheel can be obtained.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of power transmission in a conventional example using a double ■ belt, Fig. 2 is a sectional view of a double ■ belt, and Fig. 3 is an illustration of an example of transmission using a double toothed belt according to an embodiment of the present invention. 1 drive explanatory diagram. Figure 4 is an enlarged view of the main parts of Figure 3. 1a, 1b...Toothed belt, 2.2a, 2b.
...Driven wheel.

Claims (1)

[Scope of utility model registration request] A double toothed belt characterized in that the tooth surfaces of one pair of toothed belts are engaged with each other to form one belt, and when driving a driven wheel, the belts are separated and the tooth surfaces are driven once.