JPS606678Y2 - Transmission drive control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive control device for variably controlling the gear ratio of a variable diameter belt transmission.

In general, in variable diameter belt transmissions, by controlling the distance between the fixed pulley and the sliding pulley on the drive side, the diameter of the contact circumference between the belt and the pulley is changed, and thereby the gear ratio of rotational power can be varied. I have to.

As a method to control the distance between fixed and sliding pulleys,
There are two methods: a hydraulic method and a screw winding method, but the former is expensive, so the latter is usually used.

Conventionally, in either method, maintenance work such as belt replacement requires removing the driven or sliding pulley itself, or
Alternatively, the entire rotating shaft is removed, and especially in the latter case, when automating the control of the distance between the pulleys of the drive-side pulley device, this pulley device is linked to the pilot motor mechanism via a worm gear, etc. Because there are
There is a drawback that this belt replacement and maintenance becomes extremely complicated.

In particular, when this type of belt transmission is used for blowers in cooling towers, etc., there are various restrictions on maintenance work conditions, such as installing it in a dangerous location and in a narrow area. It is necessary to make improvements to the transmission that will simplify replacement work.

An object of the present invention is to provide a drive control device for a transmission that simplifies maintenance work such as belt replacement.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is an input rotating shaft connected to a power source such as an electric motor, 2 is an intermediate rotating shaft, and 3 is an output rotating shaft to which a load such as a blower fan is connected, each of which is a frame sealed by a lid 12. It is located within 11.

Further, on the input shaft 1, there is a driving pulley device 6 consisting of fixed and sliding pulleys 6a and 6b, and on one end of the intermediate shaft 2, there is a driven pulley device 7 consisting of similar fixed and sliding pulleys 7a and 7b. The belt 4 is wound between both pulley devices 6 and 7.

On the other hand, a large-diameter pulley 8 is attached to the output shaft 3, a small-diameter boolean IJ 9 is attached to the other end of the intermediate shaft 2, and three
A belt 5 is wrapped around it.

The intermediate shaft 2 is supported by a fixed holder 13.

The holding body 13 has three fixed arms 13a, 13b and 13c.
, each of which has a standing pillar 1 erected from a frame 11
4a, 14b and 14C and are fixed by stud bolts and nuts embedded therein.

Further, this holder 13 is secured to the arc wall 15a of the projecting pieces 14d and 14e by bolts 16a, 16b and 17.

15b to compensate for the elongation of the belt 5.

On the other hand, above the driven pulley 7, there is a centrifugal blower 20, and an impeller 21 and a spiral cover 22 are mounted on the spring part of the pulley 7b.
There is.

Further, in the drive-side pulley device 6, an operating threaded rod 25 is installed between both pulleys via a bearing, and a sprocket 26 is installed at the protruding open end.

The rotation of the threaded rod 25 causes the guide 27 to move up and down, and the sliding pulley 6b also moves up and down accordingly.

In FIG. 2, a transmission member, ie, a chain transmission member 28, is connected to the sprocket 26 and a pilot motor control device 30.

Based on the control of this pilot motor control device 30, the belt 4 shifts between the drive side and driven side pulley devices 6, 7 to change the gear ratio.

As a result, the speed of the output shaft 3 is controlled from the input shaft 1 via the intermediate shaft 2.

However, to replace the belts 4 and 5, first remove the lid 12, then loosen the nuts that fix the holder 13 on the stand columns 14a, 14b, and 14c, and then Reduce the distance between the shafts and remove belts 4 and 5.

However, at this time, as is clear from FIGS. 1 and 2, the belt 4 needs to straddle the transmission member 28, so the transmission member 28 must be separated from the sprocket 26.

Next, this situation will be explained with reference to FIGS. 3 to 5.

FIG. 3a shows the constituent countries of the pilot motor control device 30 installed in the frame 11, and the diagram also shows the drive side pulley device 6.
The countries in which the regulators are comprised are shown.

A casing 31 is screwed to the outer wall of the frame 11,
A cover 32 is provided on the front surface of the casing 31 to seal it.

A holding slide plate 33 having a T-shaped cross section is provided inside the holding slide plate 33, and a combination of a pilot motor 34 and a gear head 35 is installed on the horizontal surface portion 33a of the slide plate 33.

The back surface of the vertical surface 33b is used as a terminal operation plate, and lead wires (not shown) are drawn out and introduced from the wiring through hole 51 of the casing 31.

4 and 5 are a cross-sectional view and a front view, respectively, of the transmission drive control device of FIG. 3.

As is clear from FIGS. 4 and 5, there are bolt support parts 38a, 3Bby38c and 38d at the four corners of the inner wall of the casing 31, and the bolts 39 are attached to the T-shaped slide plate 3.
3 is fixed.

The horizontal surface 33a of the slide plate 33 has a shaft hole 33c, and the vertical surface 33b thereof has a through hole 33 for passing a gear.
d is opened.

An output shaft 40 from the gear head 35 is inserted into the shaft hole 33c, and a gear 41a and a sprocket 42 are connected thereto, and a bearing 44 and a bearing fitting 43 are bolted to bolt supports 38b and 38d at the tip of the shaft hole 33c. has been done.

The rotational power of the gear 41a is further transmitted to the gears 41b, 41c,
The rotational power is transmitted from the gears 41e and 41f to the potentiometer 46 via the shaft 45 via the shaft 41d, where it is converted into a rotation range of about 270 degrees.

The shaft 45 is further provided with cams 47a and 47b, which can drive high limit and low limit switches 48at48b, respectively.

50 is a terminal plate, and the energizing power of the pilot motor 34 and the signal line of the potentiometer 46 are connected to this terminal plate 5.
0 through the wiring through hole portion 51.

52 is a capacitor for controlling the power phase of the pilot motor 34.

FIG. 3 shows an adjustment device that is provided integrally with the drive pulley device 6 as already shown in FIG.

In the figure, the large diameter sprocket 26 is controlled via the small diameter sprocket 42 and chain transmission member 28 shown in FIG. 3a.

In this case, the output shaft 40 from the pilot motor 34 and the rotating shaft of the drive-side pulley device 6, that is, the input shaft 1 or the operating threaded rod 25, are parallel to each other, and the distance between their axes is fixed.

When replacing the belt 4, the belt 4 needs to straddle the transmission member 28, and the transmission member 28
must be removed when replacing.

To do this, the output shaft 40 of the pilot motor 34 is brought closer to the operating threaded rod 25 to shorten the distance between the shafts.

That is, in this embodiment, the slide plate 3 on which the combined body of the pilot motor 34 and the gear head 35 is installed
3 toward the operating threaded rod 25.

This moving operation is performed by removing the cover 32 from the housing 31, inserting a tool such as a spanner through the opening of the housing 31, and then inserting a tool such as a spanner into the bolt supports 38a, 38b, 38c, and 38d.
This is done by loosening the nuts 37 screwed onto each bolt 39 of the bolts 39, in which case the nuts 37 are only loosened and not removed from the bolts 39.

Therefore, the slide plate 33 is attached to the housing 31 with the bolt 3.
9. Since the pilot motor 34 can be brought close to the operating threaded rod 25 while being attached via the fixing means consisting of the nuts 37, the transmission member 28 stretched between both sprockets 26 and 42 can be easily removed. can be removed.

Next, when the transmission member 28 is removed from between both sprockets 26, 42, the belt 4 between both pulley devices 6, 7 is attached, and a new belt 4 is stretched between both pulley devices 6, 7.

Next, the transmission member 28 is stretched again between both sprockets 26 and 42 and tightened with the fixing means consisting of the nut 37 and bolt 39, and then the cover 32 is screwed onto the housing 31 to complete the replacement work of the belt 4. .

In this figure, although the slide plate 33 is moved by loosening the nut 37, it is held by the bolt 39 and nut 37 so as not to separate from the housing 31, and the pilot motor 34 and the gear head 3
The combined body No. 5 remains fixed to the slide plate 33.

Therefore, by simply loosening or tightening the nut 37 with respect to the bolt 39 by operating from the outside of the frame 11, the transmission member 28 can be easily removed from or tensioned from both sprockets 26 and 42. pulley device 6,
This makes it extremely easy to remove the belt 4 stretched between the belts 7 and to install a new belt 4.

This invention is as described above, and consists of a variable diameter pulley member 6 on the driving side and a variable diameter pulley member 7 on the driven side, and a belt 4 is stretched between the two members 6 and 7 to seal the belt transmission for transmitting power. It is housed in a frame 11, and this sealed frame 11 is provided with a lid for opening and closing the opening for belt replacement, and the sliding pulley is moved to the drive side variable diameter pulley member 6 and fixed to this pulley. A pilot motor 34 of a pilot motor control device includes a reversible rotating member 25 that adjusts the distance between the pulley and the pulley, and controls the rotation of the reversible rotating member 25.
is tightened to the sealed frame 11 by fixing means 37 and 39 that can be operated from the outside so that the distance between the pilot motor 34 and the reversible rotating member 25 can be moved toward and away from each other, and the rotation of the pilot motor 34 is transmitted. Since the transmission is transmitted to the reversible rotating member 25 by the member, when replacing the belt stretched between the variable diameter pulley members, the pilot motor can be rotated by simply loosening the fixing means from outside the sealed frame. It is easy and simple to move the motor in the direction of the reversible rotating member, and there is no need to hold the heavy pilot motor during this time, so rotation can be transmitted between the pilot motor and the reversible rotating member. The transmission member can be easily removed or tensioned.

Therefore, the belt that straddles the transmission member can be replaced easily without requiring a large number of workers.

Therefore, in belt replacement and maintenance work, the conventional effort of removing the entire transmission from the load such as the blower or disassembling the variable diameter pulley member to replace the belt is completely eliminated. It is possible to efficiently replace the belt with a simple operation from outside the sealed frame, which greatly contributes to reducing the cost of replacing the belt and reducing the risks of belt replacement work in dangerous areas. It is.

[Brief explanation of the drawing]

1 and 2 show longitudinal and transverse cross-sectional views, respectively, of a belt transmission in which a drive control device according to an embodiment of the present invention is used. 3a and 3b respectively show the drive control device and the adjusting device of the pulley device connected thereto, and FIGS. 4 and 5 show a cross-sectional schematic diagram and a front view of the drive control device. A schematic diagram is shown for each. In the figure, 10...belt transmission, 6 and 7...
...Drive side and driven side pulley devices, 8 and 9
...Pulley, 30...Pilot motor control device, 26.42...Sprocket.

Claims (1)

[Scope of utility model registration request] A belt transmission consisting of a variable diameter pulley member 6 on the driving side and a variable diameter pulley member 7 on the driven side, with a belt 4 stretched between the two members 6 and 7 to transmit power, is housed in a sealed frame 11,
A lid body for opening and closing the opening for replacing the belt 4 is provided on the hermetic frame body 11, and the sliding pulley is moved to the drive side variable diameter pulley member 6 to increase the distance between the sliding pulley and the fixed pulley. A reversible adjustment device 25, 27 for wide/narrow adjustment is provided,
A pilot motor 34 of a pilot motor control device for controlling the operation of this reversible adjustment device 25.27 is attached to the closed frame 11 by fixing means 37.39 which can be operated from the outside. The rotation of the pilot motor 34 is transmitted between the transmission members 26, 42.2 and 42.2.
8 to the reversible adjustment device 25, 27.