JP2967261B2 - Transmission belt car - Google Patents

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 pulley (pulley) used as one part of a belt transmission.

[0002]

2. Description of the Related Art As power transmission means, a V-belt transmission system, a toothed belt transmission system, a chain transmission system, and others are widely known.

The V-belt transmission system has the following advantages. Slippage is small even when the shaft distance is small and the speed ratio is large. Driving is quiet and has the effect of alleviating impact. Long life and saves space. In particular, the V-belt not only has a large coefficient of friction, but also wraps around the V-belt wheel and, when the inside spreads, comes into close contact with both side surfaces of the groove of the V-belt wheel to generate a sufficient frictional force, and has a linear shape. Occasionally, the width is reduced and the vehicle is easily separated from the groove of the V-belt wheel. Therefore, a large rotational force can be transmitted with a relatively small tension.

[0004] The toothed belt drive system is also referred to as the timing belt drive system and synchronous belt drive system. This toothed belt transmission scheme is a belt with a tooth of a certain pitch, it applied to the belt pulley with the teeth of the same pitch as this
Not occur slippage between them, it is possible to maintain the speed ratio constant. Since the toothed belt transmission does not depend on frictional force, no initial tension is required. Therefore, there are many advantages such as a small load on the bearing, a large speed ratio without fear of slippage, a very high speed to a very high speed transmission, and no need for lubrication.

[0005] In the chain transmission method, the distance between the shafts is 4 m or less.
Toka case short as of, and if you want to ensure to keep the speed ratio
Whether, and if you want to transmission from one of the driving shaft to a large number of the driven shaft
It is mainly used when the transmission power is large.
Ji En transmission also, initial tension does not depend on the frictional force is not required, the transmission efficiency is good.

In the V- belt transmission, a V-belt, a driving V-belt wheel, a driven V-belt wheel, and the like are used. In the toothed belt transmission, a toothed belt, a driving toothed belt wheel, a driven toothed belt wheel, and the like are used. In the chain transmission system, a chain, a driving sprocket, a driven sprocket, and the like are used. These belt transmission systems are used in various devices including an automatic door opening and closing device.

One of the most expensive of the above-mentioned power transmission means is a toothed belt transmission system in which a belt or a belt wheel having teeth with a constant pitch is required. In order to alleviate such cost increase factors, an inexpensive T-belt wheel is used on the driven side of the toothed belt transmission system. Therefore, in the case of the automatic door opening / closing device described below with reference to FIGS. 5 and 6, a T-belt wheel is used on the driven side of the toothed belt transmission.

[0008] The above "T belt car" is
It is an abbreviation (slang) for "Gubert car". This is "
"T" is abbreviated as "T"
-ing Therefore, in the following description, "T belt
"Car" also refers to "timing belt car".

In the automatic door opening and closing device illustrated in FIGS. 5 and 6, the driven T-belt wheel 1 has a belt hooking surface (circumferential surface) 2 and a pair of flanges 3. The support 4 for supporting the T-belt wheel 1 is formed of a channel having flanges 5a and 5b. The T-belt wheel 1 is rotatably mounted on the front surface of the support 4. The base 6 includes a support 4
Receiving groove 7a · for receiving the flanges 5a · 5b of
7 b and other uneven structures are provided on the front side of the mounting plate 8.

After the flanges 5a and 5b are respectively fitted into the receiving grooves 7a and 7b, the support 4 is provided with one of the bolts 11 which is screwed into the screw hole 9 of the mounting plate 8 through the flange 5b. When, is fixed to the base 6 at the other bolt 12 screwed into the screw hole 10 of the flange 5b. In this case , one of the bolts 11 tightens one side of the flange 5b and the mounting plate 8, while the other bolt 12 has its tip abutting on the mounting plate 8 when screwed in. Other side of the but to Tsu <br/> both flanges 5a · 5b, due screwing the bolt 12 relative to the threaded hole 10, from the front of the mounting plate 8 and retracted to collide with the edges of the two receiving grooves 7a · 7b Release. The support 4 thus attached to the base 6
The other side of the mounting plate 8 is separated from the front surface of the mounting plate 8 to cause an inclination of an α angle.

In the automatic door opening / closing apparatus illustrated in FIGS. 5 and 6, the toothed belt 13 is driven by a driving side T-belt wheel (not shown) .
Toothed belt wheel ) and the driven side T belt wheel 1. A part of the door (not shown) is a toothed belt 1
Fixed to 3. Incidentally, T belt vehicle 1 of core wire L ₀₁ shown in Figure 6, tilted by θ angle relative to center line L ₀₂ of toothed belt 13 to the support 4 resulted inclination of α angle.

In the case of the automatic door opening / closing device illustrated in FIGS. 5 and 6, the forward / reverse rotation of the motor is transmitted to the toothed belt wheel (drive side) via the speed reducer, and the toothed belt is accordingly driven. 13 and the T-belt wheel 1 rotate forward and backward, so that the door is opened and closed.

[0013]

In [0008] The toothed belt transmission system described above, in order to core wire L ₀₁ T-belt pulley 1 has occurred inclined relative core L ₀₂ of the toothed belt 13, toothed The side surface of the attached belt 13 rubs strongly against the inner surface of the flange 5 to generate noise (squeaking noise). In addition, the life of the toothed belt 13 is shortened. Such a phenomenon also occurs when the center line of the V-belt wheel is inclined with respect to the center line of the V-belt in the V-belt transmission system.

Further, in the technical field where the V-belt transmission system, the toothed belt transmission system, the chain transmission system, the wire transmission system, etc. are selectively used, for example, in the field of the automatic door opening and closing device, these are used. Since there is no interchangeability between belt pulleys, it is necessary to assemble a predetermined pulley and attach it to a predetermined portion when assembling the apparatus or replacing parts. Therefore, it is often troublesome and inconvenient to perform this kind of work.

SUMMARY OF THE INVENTION In view of the above technical problems, the present invention can prevent noise generation during belt transmission and reduce the cost of products, and can also be used for various belt transmission systems. The purpose of the present invention is to provide a transmission belt wheel that can be used.

[0016]

According to a first aspect of the present invention , there is provided a transmission belt drive having the following means for achieving the desired object. That is, the transmission belt of claim 1
Ltd car is along the circumferential direction and has a V-belt
And V-shaped groove for, along and adjacent to both sides of the V-shaped groove in the circumferential direction
A pair of inclined steps for hanging a toothed belt, and a pair of flanges along the circumferential direction adjacent to the outside of both inclined steps, are formed on the belt hooking surface; both inner side surfaces of the shaped groove is inclined toward the both inclined step portion
And the width of the bottom of the V-shaped groove extends over both inner surfaces.
And that the two inclined steps have V
It has a larger diameter than the groove, and these inclined steps have V
It is characterized in that it is inclined toward both flanges with a gentler gradient than both inner side surfaces of the shaped groove, and that both flanges have a larger diameter than both inclined steps.

A transmission belt wheel according to a second aspect of the present invention.
Is the inner surface of both flanges according to claim 1.
Is steeper toward the outside of the flange
It is characterized by being inclined.

A transmission belt wheel according to claim 3 of the present invention.
Is the one according to claim 1, which is along the circumferential direction.
Sectional arcuate concave groove for applying a wire belt there is a feature that it is formed in the groove bottom center of V-grooves
I do.

[0019]

The transmission belt wheel according to the present invention is used as a driving side V-belt wheel or driven side V-belt wheel in a V-belt transmission system, or as a driven side toothed belt-wheel in a toothed belt transmission system. I do. In the case of the V-belt transmission system, the V-belt can be stably held by hanging the V-belt in the V-shaped groove of the belt wheel. It can be stably held by hanging on a part. Further, in the case of a transmission belt wheel having a concave groove on the bottom surface of the V-shaped groove, a thin belt (circular cross section, rectangular cross section, etc.) is provided in the concave groove.
And hold it stably.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a transmission belt wheel according to an embodiment of the present invention.

The belt wheel 21 illustrated in FIGS.
One example is a plastic molded product, and another example is a metal molded product or a metal processed product, and has a well-known wheel structure as a skeleton. A hole is formed in the shaft center of the belt wheel 21, and a metal bearing 22 is fitted into the shaft center hole as an example. A belt hooking surface 23 as an outer peripheral surface of the belt wheel 21 has a V-shaped groove 24 extending in the circumferential direction, a pair of inclined steps 28a and 28b extending in the circumferential direction, and a pair of flanges 30a and 30b extending in the circumferential direction. doing.

The V-shaped groove 24 is located at the center in the width direction of the belt hanging surface 23 and has a pair of inner surfaces 25a and 25 inclined in a V-shape.
b and a groove bottom (circumferential surface) 26 extending over both inner side surfaces 25a and 25b . Both inner surfaces 25a and 25b
And the groove bottom surface 26, these intersecting corners are arcuate surfaces 27.
a. 27b chamfered.

The pair of inclined steps 28a and 28b are V-shaped grooves 2
4 are larger than the V-shaped groove 24 on both sides. These inclined steps 28a and 28b are formed on both inner side surfaces 25 of the V-shaped groove 24.
It is inclined toward both flanges 30a and 30b at a gentler gradient than a and 25b. Both inner side surfaces 25a and 2 of V-shaped groove 24
5b and the two inclined steps 28a and 28b are chamfered at their intersecting corners by arcuate surfaces 29a and 29b.

The pair of flanges 30a and 30b are located outside the two inclined steps 28a and 28b and
Having a diameter larger than 8b. These flanges 30a
The inner side surfaces 31a and 31b of 30b are formed with both inclined steps 28a and 31b.
It inclines toward the outer surface of each flange at a steeper angle than 28b. Inner side surfaces 31a and 3 of both flanges 30a and 30b
The corner where 1b and both inclined steps 28a and 28b intersect also
It is chamfered by the arc surfaces 32a and 32b.

The axle 33 illustrated in FIGS. 1 and 2 is made of metal. The axle 33 passes through the bearing 22 of the belt wheel 21 and is attached to the axis of the belt wheel 21. Therefore, the belt wheel 21 can freely rotate around the axle 33.

In FIG. 1 and FIG. 2, a support 34 for rotatably supporting the belt wheel 21 is made of an arbitrary material such as a metal molded product, a metal processed product, and a plastic molded product. It is composed of a channel member having the same. When the belt wheel 21 is mounted on the front surface of the support 34, the support 3 is attached to the through-end portion (bolt portion) of the axle 33 penetrating the front wall (illustrated wall hole) of the support 34.
The nut 36 is screwed in from the back side of 4 and tightened. In this case, since the spacer 37 ring-shaped between the belt pulley rear surface and the support front is interposed, the axle 31 also passing through the scan <br/> spacers 37.

1 to 3, reference numeral 41 denotes an endless V-belt , and reference numeral 42 denotes an endless toothed belt (timing belt). The V-belt 41 and the toothed belt 42 are mainly made of rubber or synthetic resin and combined with a reinforcing material, and both are well known.

The belt wheel 21 illustrated in FIGS.
When this is used as a part of the automatic door opening / closing device, it is attached to the base of the automatic door opening / closing device in the same manner as in FIGS. 5 and 6 described above. And if it is a V belt 41, FIG.
The V-belt 41 is hung on the V-shaped groove 24 of the belt wheel 21 as shown by a dashed line in FIG. 3, and if it is a toothed belt 42, the toothed belt is shown as a two-dot chain line in FIGS. A belt 42 is hung on both inclined steps 28a and 28b of the belt wheel 21.

[0028] In an example in the above, the belt wheel 21 as V belt pulley and / or V belt pulley follower for the drive are <br/> used. In this use example , the V-belt 41 is a V-shaped groove 24.
, And is rotated in a predetermined direction when each of the driving and driven belt wheels 21 rotates forward or backward. In other examples in the, because pulley 21 is used as a driven belt wheel in the toothed belt drive, toothed belt 42 is subjected over with driving teeth belt pulley and the driven pulley 21 Doo. Therefore, the toothed belt 42 in this example has its driving side meshed with the driving toothed belt wheel, and its driven side has the driven belt wheel 21.
Are held stably by the two inclined steps 28a and 28b, and rotate forward and backward with each belt wheel.

The belt wheel 21 illustrated in FIG.
In the above-described belt wheel described with reference to FIG. 3, a concave groove 38 having an arc-shaped cross section (substantially semicircular) along the circumferential direction is formed on the groove bottom surface 26 of the V-shaped groove 24. This example
However, the groove bottom surface 26 of the V-shaped groove 24 and both side surfaces 3 of the concave groove 38
9a and 39b mean that these intersecting corners are circular arc surfaces 40.
chamfered at a.40b. Incidentally, a polygonal shape such as a quadrangle may be adopted as the cross-sectional shape of the concave groove 38. Other technical matters in the embodiment of FIG.
It is substantially the same as or similar to the technical matter described with reference to FIGS.

In the chain transmission system, when the endless rotating belt is rotated from normal rotation to reverse rotation and from reverse rotation to normal rotation within a range of less than one rotation, a driving sprocket wheel, a driven belt wheel, and a special endless rotating belt are used. Sometimes. In this case, a part of the endless rotary belt (the part corresponding to the driving sprocket vehicle) is a chain , and the remaining part (the part corresponding to the driven belt wheel) is a wire belt having a circular cross section. The belt is connected endlessly. Such means are implemented for cost of chain transmission scheme.

The belt wheel 21 exemplified in FIG. 4 is used as a driving V-belt wheel, a driven V-belt wheel, and a driven belt wheel in a toothed belt transmission as described above.
It is also used as a driven belt wheel in the above chain transmission. That is, the wire belt portion 43 of the combined chain and wire belt endless rotating belt is hung on the concave groove 38 of the belt wheel 21 as a driven belt wheel. When the endless rotating belt is composed of only a wire belt, the belt wheel 21 illustrated in FIG. 4 is used for both the driving belt wheel and the driven belt wheel.

The sheave 21 of each of the aforementioned embodiments, in addition to be used as part of the transmission mechanism in the door automatic opening device, also used as a component of the transmission mechanism in various devices. In the belt wheel 21 of each embodiment described above.
Are also arcuate surfaces 27a and 27b, arcuate surfaces 29a and 29
b, arc surfaces 32a and 32b and arc surfaces 40a and 40b may be omitted. In addition , both flanges 30a and 3
0b are not inclined, that is, the inner surfaces 31a and 3b of both flanges 30a and 30b are not inclined.
1b may be parallel to these outer surfaces.

[0033]

The transmission belt wheel according to the present invention can cope with both the V-belt and the toothed belt, and can also cope with a wire belt depending on the embodiment. The versatility or versatility as a car is enhanced. Therefore, it is possible to reduce the types of parts required for assembling the apparatus including the transmission mechanism and replacing parts.
This type of work is also simplified.

When the transmission belt wheel according to the present invention is used, the V-belt is stably held by the V-shaped groove, the toothed belt is stably held by the two inclined steps, and the wire belt is stably held by the concave groove. Will be retained. In particular, when the transmission pulley according to the present invention is used as a driven pulley in toothed belt transmission, both inclined steps tend to guide the toothed belt to the center in the width direction of the pulley. Even if the center line of the belt is inclined with respect to the center line of the belt, the side surface of the toothed belt does not rub against the inner surface of the flange. Therefore, generation of noise and reduction in the life of the belt due to friction between the side surface of the toothed belt and the inner surface of the flange can be eliminated.

The transmission pulley according to the present invention has a V-shaped groove,
Since the inclined step portion and the flange are formed on the belt hooking surface, and a concave groove is optionally added,
A versatile belt wheel can be provided at a lower cost than a toothed belt wheel or a sprocket wheel.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a transmission belt wheel according to the present invention.

FIG. 2 is a cutaway side view showing one embodiment of a transmission belt wheel according to the present invention.

FIG. 3 is a partially enlarged sectional view showing one embodiment of a transmission belt wheel according to the present invention.

FIG. 4 is a cutaway side view showing another embodiment of the transmission belt wheel according to the present invention.

FIG. 5 is a side view illustrating a conventional transmission belt wheel.

FIG. 6 is a plan view illustrating a conventional transmission belt wheel.

[Explanation of symbols]

Reference Signs List 21 belt wheel 23 belt hooking surface 24 V-shaped groove 25a V-shaped groove inner surface 25b V-shaped groove inner surface 26 groove bottom surface 28a inclined step portion 28b inclined step portion 30a flange 30b flange 31a inner surface of flange 31b inner surface of flange 38 concave groove

Continuation of the front page (56) References Japanese Utility Model Showa 54-69258 (JP, U) Japanese Utility Model Showa 55-29760 (JP, U) Japanese Utility Model Showa 58-19158 (JP, U) Japanese Utility Model Showa 58-33852 (JP , U) Japanese Utility Model Showa 60-89457 (JP, U) Japanese Utility Model Hei 1-167783 (JP, U) Japanese Utility Model Sho 38-10204 (JP, Y1) Japanese Utility Model Sho 47-31957 (JP, Y1) Japanese Utility Model Sho 48-1075 (JP, Y1) (58) Field surveyed (Int. Cl. ⁶ , DB name) F16H 55/36, 7/02

Claims (3)

(57) [Claims] 1. A V-belt extending along a circumferential direction.
And V-shaped groove of the order, and a pair of sloping steps for be those adjacent to both sides of the V-shaped groove along the circumferential direction to apply a toothed belt, a circumferential adjacent the outer surfaces of the sloping steps that a pair of flanges along the direction are formed on the belt receiving surface, and both inner side surfaces of the V-shaped groove is inclined toward the both inclined step portion
And the width of the bottom of the V-shaped groove extends over both inner surfaces.
And that the two inclined steps have V
It has a larger diameter than the groove, and these inclined steps have V
A transmission belt vehicle characterized in that it is inclined toward both flanges at a gentler gradient than both inner side surfaces of the groove and both flanges have a larger diameter than both inclined steps. 2. The transmission belt drive according to claim 1, wherein the inner side surfaces of the two flanges are inclined toward the outer side surface of the flange at a steeper angle than the two inclined steps. 3. A wire belt extending along a circumferential direction.
Sectional arcuate concave grooves for hanging is in the groove bottom of the V-shaped groove
The transmission belt wheel according to claim 1, which is formed at the center .