JPH0113873Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to the improvement of a speed change control device suitable for automatically controlling a belt transmission from a remote location using electric signals. The present invention relates to a speed change control device for a belt transmission that can withstand long-term operation even if the machine is installed in a dangerous outdoor location or in a narrow space or is directly exposed to raindrops, dust, etc.

[Conventional technology]

FIGS. 3A and 3B show a front view and a side sectional view, respectively, of an entire belt transmission to which a conventional speed change control device is applied. In the figure, 1 is a belt transmission, 2 is a main motor, 3 is an input shaft, 4 is an output shaft,
5 is a speed change controller. Further, 5a is a conversion section, 5b
5c and 5d are transmitters, 5e is an increase/decrease switching unit, 5c and 5d are transmitters,
is a lever, and 5f is a winding screw. 6 and 7 are variable diameter pulley bodies, 8 is an operating device, and 9 is a housing. As is clear from the figure, the power of the main motor 2 is applied to the output shaft 4 via the belt transmission 1 in accordance with the switching operation of the operating device 8, and is taken out as a variable speed output. However, conventional belt transmissions 1 of this type are overwhelmingly used indoors, such as in factories. For this reason, the housing 9 of the belt transmission section has a semi-closed structure in order to suppress heat generation in the pulley body.
On the other hand, along with this, the speed change controller 5 was also designed as an open type, and each part was designed individually. Especially the third
As is clear from the figure, the conversion section 5a and the increase/deceleration switching section 5b are installed separately in the housing 9. Therefore, the transmitters 5c and 5d are exposed.

〔problem〕

However, with the structure of the conventional belt transmission 1 and speed change control device 5, exposure to raindrops, dust, etc. must be avoided from the viewpoint of rust prevention, and on the other hand, exposure to raindrops, dust, etc. must be avoided, and on the other hand, it is necessary to avoid exposure to raindrops, dust, etc. In some cases, it is inconvenient to cover it with a large protective cover even in order to create a smooth air flow.

Furthermore, in this type of transmission, maintenance work such as belt replacement is frequently required, but in the configuration of the conventional transmission control device described above, the converting section 5c,
Since the acceleration/deceleration switching unit 5b and the transmitters 5c and 5d are not arranged centrally, maintenance work requires a lot of time and manpower. In particular, in the case of belt replacement, it is extremely difficult to disassemble the transmitters 5c and 5d, remove the sprocket, remove the speed change controller 5, remove the lid of the housing 9, and then disassemble the pulley bodies 6 and 7. Complex work is unavoidable and maintenance work is completely inefficient. For this reason, this belt transmission is unsuitable for application to, for example, a blower installed in a dangerous and narrow space at a high place, such as a heat exchanger, and has not been put to practical use. This is because the speed change controller 5 itself is installed completely separately from the housing 9, and the internal engagement type between the speed change controller 5 and the variable diameter pulley body 6, as well as the internal equipment of the speed change controller 5. This is due to the fact that no consideration has been given to the arrangement and the mutual relationship between the casing and the housing 9.

[Means for solving problems]

In this idea, in order to construct the entire transmission control device as a single integrated assembly, we first placed a heavy geared motor at the center, and installed a dish-shaped frame on the indoor side of this motor and a circuit panel on the outdoor side. Placed. Furthermore, a support for the shift lever is arranged on the frame, and a control circuit element is arranged on the circuit panel.

With this configuration, the shift lever, hoisting screw, and
The frame, geared motor, and circuit panel form an integrated assembly, and this integrated assembly can be attached to and removed from the transmission housing. Especially when installed, the end engagement part of the shift lever engages with the pulley body. configured to match.

[Effect]

With the above-mentioned configuration, in the past, control power sources such as reversible motors, hoisting screw lever positions, etc. were arranged at different locations, and the axis directions of each device were also different.In contrast, in the present invention, The speed change control device itself can now be constructed compactly as a completely single integrated assembly, and the axes of the devices placed there can now be positioned parallel to the pulley rotation axis. Therefore, as long as there is a narrow space around the side of the variable diameter pulley body, almost the entire speed change control device can be sufficiently accommodated in the housing. Therefore, unlike in the past, they are not disposed separately on the outer wall of the housing of the transmission itself, but only the part necessary for operation protrudes from the housing, resulting in an excellent design. Circuit elements can be easily operated from outside. In addition, the speed change control device itself can be installed and removed as long as there is a designated pull-out space around the side of the housing in the radial direction from the pulley rotation axis, making maintenance work such as belt conversion faster and more efficient. The belt transmission can be applied to poor environments such as wards, rain, and dust.

〔Example〕

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

FIG. 1 shows a partial sectional view of a belt transmission equipped with a speed change control device of the present invention for speed change control of a variable diameter pulley device on the driven side of a known belt transmission.

In the figure, 10 is a housing of a belt transmission, and a flange portion 11 of a main electric motor (not shown) is attached above. Furthermore, the rotating shaft 12 of the main motor 11 is inserted into the room through the opening 13 through the flange portion 11, and a variable diameter pulley body 2 consisting of fixed and sliding pulleys 21 and 22 is inserted into the rotating shaft 12.
0 is attached in a cantilevered manner. The sliding pulley 2 is connected to the support shaft portion 25 of the fixed pulley 21.
As the sliding contact portion 26 of No. 2 slides up and down, a belt (not shown) held by the conical tapered portion of each pulley 21 and 22 is moved between the pulleys 21 and 22.
The radius of the contact circumference is continuously changed.
As a result, the speed ratio of the belt transmission can be controlled.

Next, the configuration of the speed change control device 60 will be explained. The speed change control device 60 includes three parts, a circuit panel part 30, a frame part 40, and a shift lever support part 50, each of which is constructed as an integral assembly.

First, the circuit panel section 30 has a shape that protrudes from the housing 10 in this embodiment. A T-shaped panel 33 to which a circuit device 34 is attached is arranged in a space surrounded by an outer cover body 31 and an outer cover 32 for maintenance work from the outside. The circuit device 3 provided on the flat surface of this panel 33 in the outdoor direction
4 is composed of a phase advance capacitor 35, a potentiometer 36, a limit switch (not shown), and a shift position detection device 37 consisting of a rotation screw 37a and an adjustment piece 37b. on the other hand,
The rotation screw 37a is connected to the second power transmission device. In this embodiment, the second power transmission is the gear 3
8 and 19. This rotation screw 3
The rotational power of 7a is further transmitted to a pair of gears 37c, 37.
d to the potentiometer 36.

Next, the frame portion 40 will be explained. Frame part 4
0 is a frame 4 configured in a special shape to form a space for housing a geared motor in which a motor 15 and a gear head 16 are integrated.
It consists of 1. The frame 41 is made of sheet metal and has the following configuration. That is, the flange portion 41 has a mounting hole 41a for installing the outer cover body 31 and a through hole 41b for installing the above-described integral assembly on the wall surface of the transmission housing 10 via the outer cover body 31.
d, and a geared motor installation space 41e formed by protruding the inside of the flange portion 41d into a dish shape.
, a flat part 41f that holds the support frame 42 of the shift lever 51, and a connecting part 41 that connects the flat part 41f and the flange part 41d and transmits the bending moment applied to the flat part 41f to the flange part 41d.
It consists of g. Note that instead of the plane part 33c of the T-shaped panel 33, there is a plane part of the motor installation part that is perpendicular to the flange part 41d and the plane part 41f and has an opening in the center that passes through the output shafts of the geared motors 15 and 16. is configured to protrude from the connecting portion 41g and the flat portion 41f, and the panel 33 is
It may be made into a flat shape without being made into a mold. Further, in this case, it is also easy to support the flat panel on the frame 41 side. A gear 19 and a sprocket 17 for the first and second power transmitters are installed on the output shaft of the geared motor, and the gear 19
further meshes with a rear gear 38 to form a second power transmission. Also, sprocket 17 is
It is interlocked with the sprocket 18 via a transmission body, and forms a first power transmission machine. Note that gears may be used here.

Further, the shift lever support portion 50 is attached to the frame 41.
A support frame 42 fixed to the back surface of a flat part 41f by four screw parts 43, a hoisting screw 54 installed inside the support frame 42, and guide shafts 57a, 57b.
and a shift lever 51. This shift lever 51 is formed into a U-shape or a Y-shape as a whole, and has through-holes installed with rubber seals (not shown) in the upper and lower ends thereof, respectively, and pass through the guide shafts 57a and 57b. ing. The center of one end of the shift lever 51 is screwed into a winding screw 54 via a pusher 53 which is internally threaded. The other free end is bifurcated in a Y- or U-shape, with an engaging end 5 at the tip.
8 is formed. Since the above-mentioned sprocket 18 is installed on the hoisting screw 54, the shift lever 51 slides up and down on the hoisting screw 54 and the guide shafts 57a, 57b, depending on the rotating direction of the motor 15, and the tip The engaging end rises and the sliding pulley 2
2 is slid upward, thereby controlling the speed change. Note that the U-shaped engagement end 58 of the shift lever 51 is connected to a support 24 installed via a bearing 23 provided around the sliding contact portion 26 of the sliding pulley 22.
It engages with the engagement groove 28 provided in the. Note that it may be directly engaged with the back side stepped portion of the support ring 24, and an intervening body 27 may be installed if necessary to adjust the amount of sliding of the sliding pulley 22. Further, in the speed change control device 60 of this embodiment, an example in which the axis A of the hoisting screw 54 and the axis B of each of the shafts 57a and 57b are arranged in a straight line so as to be substantially parallel to the housing wall surface 10 is used. As shown, only one guide shaft is installed in the center, and its axis B and the axis A of the hoisting screw 54 are aligned.
are located at opposite ends of the pulley rotating shaft 12 with the axis C of the pulley rotating shaft 12 as the center, and are arranged in a straight line so that each axis is aligned perpendicularly to the housing wall surface 10 to prevent mechanical strain. It is also possible to prevent the occurrence of

As described above, the transmission control device 60 of this embodiment has the circuit panel section 30 arranged on the outdoor side and the shift lever support section 50 arranged on the indoor side, centering on the frame section 40 surrounding the geared motor. Moreover, these three parts are the circuit panel 30,
Since the frame part 40 and the support frame 50 are integrally assembled in this order, the screw hole 31a provided in the flange part 31b of the outer cover 31 and the frame 41
As long as the screw holes 41b provided in the housing 10 and the screw holes 41b are opened at the same position, the tip of the shift lever 51 of this integrated assembly can be inserted into the room through the hole 14 provided in the housing 10, and the flange portion 31b ,4
1b can be attached to the installation surface 45 from outside using screws 31c. At this time, if the tip engaging portion 58 of the shift lever 51 is set to a predetermined length from the indoor end surface of the flange portion 41a or the installation surface 45, the engaging portion 58 can be connected to the variable diameter pulley body 20 by simply attaching it. The engaged state is automatically obtained. Furthermore, it is easy to remove the integral assembly 60 from the wall surface of the housing 10 by performing the reverse procedure to that described above, and there is no need to disassemble the integral assembly 60 itself at all. Work efficiency is significantly improved. In addition, when performing maintenance work only on the circuit panel, such as when changing the speed range, the lid
Since it is only necessary to open 2, maintenance work can be made more efficient in this respect as well.

[Other Examples]

In the above-described embodiment, the panel 33 is held inside the outer cover body 31, but there is no need to be limited to this, and suitable fittings may be placed on the frame 41 to support it. Further, in this embodiment, the first power transmission section is shown as a chain and a sprocket, but it may also be a timing belt or a pulley. In addition, by installing a gear on the geared motor shaft and the rotating screw 37a, further providing an intermediate gear between them, and also installing a gear on the rotating screw 37a, direct power is generated only by the combination of multiple gears. It may be communicated. Furthermore, although the variable diameter pulley body 20 is a driving pulley in this embodiment, it may be controlled by connecting a driven pulley (not shown) to the speed change control device 60. Further, it is also easy to construct the frame 41 and the support frame 42 as an integral casting.

Furthermore, in this embodiment, the tip of the shift lever 51 is Y-shaped or U-shaped; however,
The support ring 24 does not necessarily need to be pressed at two points, and may be engaged and pressed at one point. In that case, it does not have to be Y- or U-shaped, and may be rod-shaped.

[Effect of idea]

According to this invention, the shift control device for use in belt transmissions consists of a single integral assembly in which the main components of the shift lever, hoisting screw, frame, geared motor, and circuit panel are arranged in this order. Since it has become possible to configure it as a Since there is no additional work to do, maintenance work becomes faster and more efficient.

In particular, by downsizing the speed change control device, the shift control device can be automatically moved from the side wall of the belt transmission housing toward the pulley axis by simply inserting the speed change control device and bolting it to the housing. It has the advantage that it can be installed in a narrow space between the pulley body and the housing so that the pulley body and the pulley body engage with each other. In addition, when removing the pulley, all you have to do is pull it out in the radial direction relative to the pulley rotating shaft, so maintenance work can be performed safely even when a load with a wide flat area, such as a blower blade, is attached to the output shaft of the transmission. There are advantages.

Further, according to the configuration of the present invention, even if the device is installed outdoors and exposed directly to the atmosphere, it will not be affected by temperature and humidity, eliminating the risk of corrosion. This has achieved what was conventionally thought to be impossible for belt transmissions to be used even under adverse atmospheres such as raindrops, water vapor, or dust. Moreover, since it has achieved full automation through remote control, it has great industrial utility value.

[Brief explanation of the drawing]

FIGS. 1A and 1B are longitudinal and cross-sectional views of a transmission control device according to an embodiment of the present invention, respectively, and FIGS.
The figure shows a perspective view of a shift lever support frame and a support ring used in the same embodiment. FIGS. 3A and 3B show a front view and a side sectional view, respectively, of an entire belt transmission using a conventional speed change control device. In the figure, 10...belt transmission housing, 15
... Reversible motor, 16 ... Gear head, 20 ... Variable diameter pulley body, 30 ... Circuit panel section, 34 ... Circuit device, 36 ... Potentiometer, 40 ... Frame section, 41 ... Frame,
50...Shift lever section, 51...Shift lever, 60...Shift control device.

Claims (1)

[Claims for Utility Model Registration] (1) In a speed change control device for a belt transmission that is installed in a housing to control a speed change pulley at variable speed, a dish-shaped frame is installed on the indoor side of the housing, centering on a geared motor. A circuit panel is arranged on the outdoor side, and a hoisting screw that slidably supports the shift lever and a support frame that pivotally supports the guide shaft are arranged on the indoor side plane of the frame, and a support frame that pivotally supports the guide shaft is placed on the indoor side plane of the above circuit panel. 1. A speed change control device for a belt transmission, characterized in that the circuit panel, the frame, and the support frame are integrally assembled by arranging control circuit elements for electrical control in each part. (2) In the shift control device for a belt transmission as set forth in claim (1) of the utility model filing, when the flange portion of the dish-shaped frame is attached to the housing, the tip engaging portion of the shift lever is The gearshift pulley is positioned so as to be engaged with the gearshift pulley via a bearing, and the end engaging part of the shift lever is capable of engaging or separating from the gearshift pulley as the flange is attached or detached. A speed change control device for a belt transmission. (3) In the speed change control device for a belt transmission as described in claim (2) of the utility model registration, the tip engaging portion of the shift lever is connected to the sliding portion of the speed change pulley housed in the housing. A speed change control device for a belt transmission, characterized in that it can be engaged with or separated from a support ring attached via a bearing. (4) The shift control device for a belt transmission according to claim (3) of the utility model registration, wherein the tip engaging portion of the shift lever is formed in a Y or U shape. Machine speed control device.